/* ════════════════════════════════════════
       DESIGN TOKENS
    ════════════════════════════════════════ */
    :root {
        /* Colour */
        --deep:          #07111e;
        --navy:          #0d1e32;
        --teal:          #0d9b8a;
        --teal-lt:       #11b8a4;
        --teal-dim:      rgba(13,155,138,0.12);
        --teal-rule:     rgba(13,155,138,0.3);
        --amber:         #c8883a;
        --amber-dim:     rgba(200,136,58,0.12);
        --emerald:       #10b981;
        --violet:        #8b5cf6;
        --white:         #eef2f6;
        --muted:         #8ba8bc;
        --dim:           #2d4560;
        --border:        rgba(255,255,255,0.07);
        --card:          rgba(255,255,255,0.04);
        --card-hov:      rgba(255,255,255,0.07);
        --paper:         #f2f4f7;
        --paper-alt:     #ffffff;
        --ink:           #0d1b2a;
        --ink-mid:       #2d4560;
        --ink-muted:     #546e7a;
        --border-lt:     rgba(0,0,0,0.08);
        --wave-dark:     #07111e;
        --wave-light:    #f2f4f7;

        /* Typography */
        --font-display:  'Playfair Display', Georgia, serif;
        --font-serif:    'Crimson Pro', Georgia, serif;
        --font-sans:     'Source Sans 3', system-ui, sans-serif;

        /* Spacing scale */
        --sp-xs:  0.5rem;
        --sp-sm:  1rem;
        --sp-md:  1.5rem;
        --sp-lg:  2.5rem;
        --sp-xl:  4rem;
        --sp-2xl: 7rem;

        /* Content width */
        --content: min(740px, 100% - 3rem);

        /* Effects */
        --ease:   cubic-bezier(0.4, 0, 0.2, 1);
        --shadow: 0 4px 24px rgba(0,0,0,0.3);
        --glow:   0 0 40px rgba(13,155,138,0.25);
    }

    /* ════════════════════════════════════════
       RESET & BASE — mobile first
    ════════════════════════════════════════ */
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

    body {
        font-family: var(--font-sans);
        font-size: 16px;          /* mobile base */
        line-height: 1.75;
        color: var(--muted);
        background: var(--deep);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
    }

    img { max-width: 100%; height: auto; display: block; }
    strong { color: var(--white); font-weight: 600; }
    em { font-style: italic; }

    /* ════════════════════════════════════════
       ACCESSIBILITY
    ════════════════════════════════════════ */
    .skip-link {
        position: absolute;
        top: -100%; left: var(--sp-sm);
        background: var(--teal); color: #fff;
        font-size: 0.85rem; font-weight: 600;
        padding: 0.5rem 1.25rem;
        border-radius: 0 0 8px 8px;
        text-decoration: none;
        z-index: 9999;
        transition: top 0.2s;
    }
    .skip-link:focus { top: 0; }

    :focus-visible {
        outline: 2px solid var(--teal-lt);
        outline-offset: 3px;
    }

    /* ════════════════════════════════════════
       READING PROGRESS
    ════════════════════════════════════════ */
    .reading-progress {
        position: fixed; top: 0; left: 0; right: 0;
        height: 2px; z-index: 2000;
        background: rgba(255,255,255,0.06);
    }
    .reading-progress-bar {
        height: 100%; width: 0%;
        background: linear-gradient(90deg, var(--teal), var(--amber));
        transition: width 0.1s linear;
    }

    /* ════════════════════════════════════════
       WAVE DIVIDERS
    ════════════════════════════════════════ */
    .wave { display: block; width: 100%; line-height: 0; overflow: hidden; }

    /* ════════════════════════════════════════
       HEADER ANIMATIONS
    ════════════════════════════════════════ */
    @keyframes particle-drift {
        0%   { transform: translate(0, 0) scale(1);   opacity: 0; }
        20%  { opacity: 1; }
        80%  { opacity: 0.6; }
        100% { transform: translate(var(--dx), var(--dy)) scale(0.6); opacity: 0; }
    }
    @keyframes focal-pulse {
        0%, 100% { opacity: 0.12; transform: translate(-50%, -55%) scale(1); }
        50%       { opacity: 0.18; transform: translate(-50%, -55%) scale(1.06); }
    }
    @keyframes badge-glow {
        0%, 100% { box-shadow: 0 0 0px rgba(13,155,138,0); }
        50%       { box-shadow: 0 0 12px rgba(13,155,138,0.35); }
    }
    @keyframes divider-pulse {
        0%, 100% { opacity: 0.4; transform: translateX(-50%) scale(1); }
        50%       { opacity: 1;   transform: translateX(-50%) scale(1.4); }
    }
    @keyframes scroll-fade {
        0%, 100% { opacity: 0.3; transform: translateX(-50%) translateY(0); }
        50%       { opacity: 0.7; transform: translateX(-50%) translateY(5px); }
    }
    @keyframes commitment-breathe {
        0%, 100% { opacity: 0.75; }
        50%       { opacity: 0.95; }
    }

    /* ════════════════════════════════════════
       HEADER
    ════════════════════════════════════════ */
    /* ════════════════════════════════════════
       TOP NAV
    ════════════════════════════════════════ */
    .guide-topnav {
        background: rgba(7,17,30,0.97);
        border-bottom: 2px solid var(--teal-rule);
        padding: 0 var(--sp-md);
        position: sticky; top: 0; z-index: 100;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: 0 2px 20px rgba(0,0,0,0.4);
    }
    .guide-topnav-inner {
        max-width: var(--content);
        margin: 0 auto;
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 58px;
        gap: 1rem;
    }
    .guide-topnav-breadcrumb {
        display: flex; align-items: center;
        flex-wrap: wrap; gap: 0.35rem;
    }
    .topnav-link {
        font-size: 0.85rem; font-weight: 500;
        color: rgba(238,242,246,0.65); text-decoration: none;
        letter-spacing: 0.04em;
        transition: color 0.2s;
        white-space: nowrap;
    }
    .topnav-link:hover { color: var(--teal-lt); }
    .topnav-sep {
        font-size: 0.72rem;
        color: rgba(238,242,246,0.25);
    }
    .topnav-current {
        font-size: 0.85rem; font-weight: 600;
        color: var(--teal-lt);
        letter-spacing: 0.04em;
        white-space: nowrap;
    }
    .topnav-series-btn {
        font-size: 0.8rem; font-weight: 700;
        letter-spacing: 0.12em; text-transform: uppercase;
        color: var(--teal);
        text-decoration: none;
        background: rgba(13,155,138,0.12);
        border: 1px solid var(--teal-rule);
        padding: 0.45rem 1rem;
        border-radius: 100px;
        white-space: nowrap;
        transition: background 0.2s, color 0.2s;
    }
    .topnav-series-btn:hover {
        background: rgba(13,155,138,0.22);
        border-color: var(--teal-lt);
        color: white;
    }

    /* ════════════════════════════════════════
       GUIDE HERO IMAGE
    ════════════════════════════════════════ */
    .guide-hero {
        width: 100%;
        line-height: 0;
        overflow: hidden;
    }
    .guide-hero-img {
        width: 100%;
        display: block;
        height: auto;
    }

    /* Breadcrumb */

    /* ════════════════════════════════════════
       READING COMMITMENT SIGNAL
    ════════════════════════════════════════ */
    
    /* Subtle top glow connecting to header */
    
    

    /* ════════════════════════════════════════
       DARK SECTION
    ════════════════════════════════════════ */
    .section-dark {
        background: var(--deep);
        padding: var(--sp-xl) var(--sp-md);
    }
    .section-dark .section-inner {
        max-width: var(--content);
        margin: 0 auto;
    }

    /* Dark text defaults */
    .section-dark p {
        color: var(--muted); line-height: 1.8;
        margin-bottom: var(--sp-md);
    }
    .section-dark p:last-child { margin-bottom: 0; }
    .section-dark ul, .section-dark ol {
        margin: var(--sp-md) 0 var(--sp-md) var(--sp-md);
        color: var(--muted);
    }
    .section-dark li { margin-bottom: 0.6rem; padding-left: 0.25rem; line-height: 1.7; }
    .section-dark h3 {
        font-family: var(--font-display);
        font-size: clamp(1.15rem, 3vw, 1.35rem);
        font-weight: 600; color: var(--white);
        margin: var(--sp-lg) 0 var(--sp-sm); line-height: 1.3;
    }
    .section-dark h4 {
        font-size: 0.78rem; font-weight: 700;
        color: var(--teal-lt);
        margin: var(--sp-md) 0 0.6rem;
        letter-spacing: 0.08em; text-transform: uppercase;
    }

    /* ════════════════════════════════════════
       LIGHT SECTION
    ════════════════════════════════════════ */
    .section-light {
        background: var(--paper);
        padding: var(--sp-xl) var(--sp-md);
        color: var(--ink);
    }
    .section-light .section-inner {
        max-width: var(--content);
        margin: 0 auto;
    }

    /* Light text defaults */
    .section-light p:not(.next-section-description) {
        color: var(--ink-mid); line-height: 1.8;
        margin-bottom: var(--sp-md);
    }
    .section-light p:last-child { margin-bottom: 0; }
    .section-light ul, .section-light ol {
        margin: var(--sp-md) 0 var(--sp-md) var(--sp-md);
        color: var(--ink-mid);
    }
    .section-light li { margin-bottom: 0.6rem; padding-left: 0.25rem; line-height: 1.7; }
    .section-light strong { color: var(--ink); }
    .section-light h3:not(.next-section-title) {
        font-family: var(--font-display);
        font-size: clamp(1.15rem, 3vw, 1.35rem);
        font-weight: 600; color: var(--ink);
        margin: var(--sp-lg) 0 var(--sp-sm); line-height: 1.3;
    }
    .section-light h4 {
        font-size: 0.78rem; font-weight: 700;
        color: var(--teal);
        margin: var(--sp-md) 0 0.6rem;
        letter-spacing: 0.08em; text-transform: uppercase;
    }

    /* ════════════════════════════════════════
       SECTION HEADERS (shared)
    ════════════════════════════════════════ */
    .section-header {
        margin-bottom: var(--sp-lg);
        padding-bottom: var(--sp-sm);
    }
    .section-dark .section-header { border-bottom: 2px solid var(--teal-rule); }
    .section-light .section-header { border-bottom: 1px solid var(--border-lt); }

    .section-number {
        display: inline-flex; align-items: center; gap: 0.65rem;
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.22em; text-transform: uppercase;
        margin-bottom: var(--sp-sm);
    }
    .section-number::before {
        content: ''; display: block;
        width: 1.75rem; height: 1px;
    }
    .section-dark .section-number { color: var(--teal-lt); }
    .section-dark .section-number::before { background: var(--teal-lt); }
    .section-light .section-number { color: var(--teal); }
    .section-light .section-number::before { background: var(--teal); }

    .section-title {
        font-family: var(--font-display);
        font-size: clamp(1.5rem, 5vw, 2.2rem);
        font-weight: 700; line-height: 1.15;
        letter-spacing: -0.02em;
    }
    .section-dark .section-title { color: var(--white); }
    .section-light .section-title { color: var(--ink); }

    /* ════════════════════════════════════════
       INTRODUCTION
    ════════════════════════════════════════ */
    .intro-lead {
        font-family: var(--font-serif);
        font-size: clamp(1.1rem, 3vw, 1.35rem);
        font-weight: 400; line-height: 1.75;
        color: var(--ink);
        margin-bottom: var(--sp-md);
    }
    .intro-question {
        font-family: var(--font-display);
        font-size: clamp(1.25rem, 4vw, 1.5rem);
        font-weight: 600; font-style: italic;
        color: var(--teal);
        margin: var(--sp-lg) 0 var(--sp-sm);
    }
    .principles-overview {
        background: var(--paper-alt);
        border-left: 3px solid var(--teal);
        border-radius: 0 12px 12px 0;
        padding: var(--sp-md) var(--sp-md) var(--sp-md) calc(var(--sp-md) + 0.25rem);
        margin: var(--sp-lg) 0;
        box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .principles-overview h3 {
        font-family: var(--font-display);
        font-size: 0.95rem; font-weight: 600;
        color: var(--ink); margin-bottom: var(--sp-sm);
        /* Override section-light h3 */
        margin-top: 0; text-transform: none; letter-spacing: 0;
    }
    .principles-overview ol { margin-left: var(--sp-sm); color: var(--ink-mid); }
    .principles-overview li { margin-bottom: 0.5rem; line-height: 1.6; font-size: 0.95rem; }

    /* ════════════════════════════════════════
       KEY CONCEPT CALLOUTS
    ════════════════════════════════════════ */
    .key-concept {
        border-left: 3px solid var(--amber);
        border-radius: 0 12px 12px 0;
        padding: var(--sp-md) var(--sp-md) var(--sp-md) calc(var(--sp-md) + 0.25rem);
        margin: var(--sp-lg) 0;
    }
    .section-dark .key-concept {
        background: var(--amber-dim);
        border-color: var(--amber);
    }
    .section-light .key-concept {
        background: #fff8ed;
        border-color: var(--amber);
    }

    .key-concept-label {
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.18em; text-transform: uppercase;
        color: var(--amber);
        margin-bottom: 0.65rem; display: block;
    }
    .section-dark .key-concept p { color: var(--white); margin-bottom: 0.65rem; }
    .section-light .key-concept p { color: var(--ink); margin-bottom: 0.65rem; }
    .key-concept p:last-child { margin-bottom: 0; }

    /* ════════════════════════════════════════
       PROCESS BOXES
    ════════════════════════════════════════ */
    .process-box {
        border-radius: 12px;
        padding: var(--sp-md);
        margin: var(--sp-sm) 0;
        transition: border-color 0.2s;
    }
    .section-dark .process-box {
        background: var(--card);
        border: 1px solid var(--border);
    }
    .section-dark .process-box:hover { border-color: var(--teal-rule); }
    .section-light .process-box {
        background: var(--paper-alt);
        border: 1px solid var(--border-lt);
        box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .process-box h4 {
        font-family: var(--font-display);
        font-size: 0.95rem; font-weight: 600;
        text-transform: none; letter-spacing: 0;
        margin: 0 0 0.65rem;
    }
    .section-dark .process-box h4 { color: var(--teal-lt); }
    .section-light .process-box h4 { color: var(--teal); }
    .section-dark .process-box p,
    .section-dark .process-box li { color: var(--muted); }
    .section-light .process-box p,
    .section-light .process-box li { color: var(--ink-mid); }
    .process-box ol, .process-box ul {
        margin: 0.5rem 0 0 var(--sp-sm);
    }

    /* ════════════════════════════════════════
       EXAMPLE BOXES
    ════════════════════════════════════════ */
    .example-box {
        border-left: 3px solid var(--emerald);
        border-radius: 0 12px 12px 0;
        padding: var(--sp-md) var(--sp-md) var(--sp-md) calc(var(--sp-md) + 0.25rem);
        margin: var(--sp-lg) 0;
    }
    .section-dark .example-box { background: rgba(16,185,129,0.06); border-color: var(--emerald); }
    .section-light .example-box { background: #f0fdf9; border-color: var(--emerald); }

    .example-label {
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.18em; text-transform: uppercase;
        margin-bottom: 0.65rem; display: block;
    }
    .section-dark .example-label { color: var(--emerald); }
    .section-light .example-label { color: #059669; }
    .section-dark .example-box p,
    .section-dark .example-box li { color: var(--muted); }
    .section-light .example-box p,
    .section-light .example-box li { color: var(--ink-mid); }

    /* ════════════════════════════════════════
       COMPARISON GRID
    ════════════════════════════════════════ */
    .comparison {
        display: grid;
        grid-template-columns: 1fr;   /* mobile: stack */
        gap: var(--sp-sm);
        margin: var(--sp-md) 0;
    }
    .comparison-item {
        border-radius: 12px;
        padding: var(--sp-md);
    }
    .section-dark .comparison-item {
        background: var(--card);
        border: 1px solid var(--border);
    }
    .section-light .comparison-item {
        background: var(--paper-alt);
        border: 1px solid var(--border-lt);
        box-shadow: 0 2px 6px rgba(0,0,0,0.04);
    }
    .comparison-item h4 {
        font-family: var(--font-display);
        font-size: 0.95rem; font-weight: 600;
        text-transform: none; letter-spacing: 0;
        margin: 0 0 0.65rem;
    }
    .section-dark .comparison-item h4 { color: var(--teal-lt); }
    .section-light .comparison-item h4 { color: var(--teal); }
    .section-dark .comparison-item ul { color: var(--muted); margin-top: 0; }
    .section-light .comparison-item ul { color: var(--ink-mid); margin-top: 0; }

    /* ════════════════════════════════════════
       PULL QUOTES
    ════════════════════════════════════════ */
    .pull-quote {
        margin: var(--sp-xl) 0;
        text-align: center;
    }
    .pull-quote::before, .pull-quote::after {
        content: ''; display: block;
        width: 2.5rem; height: 1px;
        background: var(--teal-rule); margin: 0 auto;
    }
    .pull-quote-text {
        font-family: var(--font-display);
        font-size: clamp(1.1rem, 3.5vw, 1.55rem);
        font-weight: 600; font-style: italic;
        line-height: 1.55; letter-spacing: -0.01em;
        padding: var(--sp-md) var(--sp-sm);
        max-width: 560px; margin: 0 auto;
    }
    .section-dark .pull-quote-text { color: var(--teal-lt); }
    .section-light .pull-quote-text { color: var(--teal); }

    /* ════════════════════════════════════════
       SCROLL DEPTH MILESTONE
    ════════════════════════════════════════ */
    .scroll-milestone {
        text-align: center;
        font-family: var(--font-serif);
        font-size: 0.95rem; font-style: italic;
        color: var(--teal-lt); opacity: 0.75;
        margin: var(--sp-md) 0;
        letter-spacing: 0.03em;
    }

    /* ════════════════════════════════════════
       SRA IMAGE
    ════════════════════════════════════════ */
    .diagram-wrap {
        margin: var(--sp-lg) 0;
        border-radius: 12px; overflow: hidden;
    }
    .diagram-wrap img { border-radius: 12px; }
    .section-dark .diagram-wrap img { box-shadow: var(--shadow); }
    .section-light .diagram-wrap img { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }

    .diagram-caption {
        font-family: var(--font-display);
        font-size: clamp(0.95rem, 2.5vw, 1.1rem);
        font-weight: 600; font-style: italic;
        text-align: center;
        margin-bottom: var(--sp-md);
    }
    .section-dark .diagram-caption { color: var(--teal-lt); }
    .section-light .diagram-caption { color: var(--teal); }

    /* ════════════════════════════════════════
       INTEGRATION BOX
    ════════════════════════════════════════ */
    .integration-box {
        background: rgba(139,92,246,0.06);
        border: 1px solid rgba(139,92,246,0.2);
        border-radius: 16px;
        padding: var(--sp-lg) var(--sp-md);
        margin: var(--sp-lg) 0;
    }
    .integration-box h3 {
        font-family: var(--font-display);
        font-size: clamp(1.2rem, 3vw, 1.4rem);
        font-weight: 700; color: var(--white);
        margin: 0 0 var(--sp-md); line-height: 1.3;
    }
    .integration-box h4 {
        font-family: var(--font-display);
        font-size: 1rem; font-weight: 600;
        color: #a78bfa;
        text-transform: none; letter-spacing: 0;
        margin: var(--sp-lg) 0 var(--sp-sm);
    }
    .integration-box p,
    .integration-box li { color: var(--muted); }

    /* ════════════════════════════════════════
       CONCLUSION
    ════════════════════════════════════════ */
    .conclusion {
        padding-top: var(--sp-lg);
        border-top: 1px solid var(--border);
        margin-top: var(--sp-lg);
    }
    .conclusion h3 {
        font-family: var(--font-display);
        font-size: clamp(1.3rem, 4vw, 1.75rem);
        font-weight: 700; color: var(--white);
        margin: 0 0 var(--sp-md);
    }
    .conclusion-anchor {
        font-family: var(--font-display);
        font-size: clamp(1.2rem, 4vw, 1.5rem);
        font-weight: 700; color: var(--white);
        line-height: 1.3; letter-spacing: -0.02em;
        margin-bottom: var(--sp-lg);
    }
    .conclusion-section { margin-bottom: var(--sp-lg); }
    .conclusion-section h4 {
        font-family: var(--font-display);
        font-size: 1rem; font-weight: 600;
        color: var(--teal-lt);
        text-transform: none; letter-spacing: 0;
        margin: 0 0 0.65rem;
    }
    .conclusion p, .conclusion li { color: var(--muted); }

    /* ════════════════════════════════════════
       NEXT SECTION CARD
    ════════════════════════════════════════ */
    .next-section {
        position: relative;
        background: #0f2035;
        border: 1px solid rgba(255,255,255,0.1);
        border-top: 3px solid var(--teal);
        border-radius: 16px;
        padding: var(--sp-lg) var(--sp-md);
        text-align: center; overflow: hidden;
    }
    .next-section::before {
        content: '';
        position: absolute; inset: 0;
        background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(13,155,138,0.07) 0%, transparent 60%);
        pointer-events: none;
    }
    .next-section-label {
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.2em; text-transform: uppercase;
        color: var(--teal-lt); margin-bottom: var(--sp-sm);
        display: flex; align-items: center; justify-content: center; gap: 0.5rem;
    }
    .next-section-label::before, .next-section-label::after {
        content: ''; display: block;
        width: 1.25rem; height: 1px; background: var(--teal-rule);
    }
    .next-section .next-section-title {
        font-family: var(--font-display);
        font-size: clamp(1.4rem, 5vw, 2.2rem);
        font-weight: 700; color: #ffffff !important;
        margin-bottom: 0.65rem; letter-spacing: -0.02em;
    }
    .next-section .next-section-description {
        font-family: var(--font-serif);
        font-size: clamp(0.95rem, 2.5vw, 1.1rem);
        font-weight: 400; color: #c8dce8 !important;
        max-width: 480px; margin: 0 auto var(--sp-lg); line-height: 1.7;
    }
    .next-button {
        display: inline-flex; align-items: center; gap: 0.65rem;
        background: var(--teal); color: white;
        padding: 0.9rem 2rem; border-radius: 4px;
        text-decoration: none; font-weight: 600;
        font-size: 0.9rem; letter-spacing: 0.03em;
        min-height: 44px;   /* touch target */
        transition: background 0.2s, transform 0.2s;
        box-shadow: 0 4px 20px rgba(13,155,138,0.25);
    }
    .next-button:hover {
        background: var(--teal-lt); transform: translateY(-2px);
    }

    /* Next section wrapper (light section) */
    .next-section-wrap {
        padding: var(--sp-xl) var(--sp-md) var(--sp-lg);
    }

    /* ════════════════════════════════════════
       FOOTER
    ════════════════════════════════════════ */
    .guide-footer {
        background: var(--paper);
        border-top: 1px solid var(--border-lt);
        padding: var(--sp-md) var(--sp-md);
    }
    .guide-footer-inner {
        max-width: var(--content);
        margin: 0 auto;
        display: flex; align-items: center;
        justify-content: space-between;
        flex-wrap: wrap; gap: var(--sp-sm);
    }
    .footer-nav-link {
        font-size: 0.85rem; color: var(--ink-muted);
        text-decoration: none; transition: color 0.2s;
        min-height: 44px; display: inline-flex; align-items: center;
    }
    .footer-nav-link:hover { color: var(--teal); }
    .footer-position {
        font-size: 0.72rem; color: var(--ink-muted);
        letter-spacing: 0.05em;
    }
    .footer-forward {
        font-size: 0.85rem; color: var(--teal);
        text-decoration: none; transition: opacity 0.2s;
        min-height: 44px; display: inline-flex; align-items: center;
    }
    .footer-forward:hover { opacity: 0.7; }

    /* ════════════════════════════════════════
       BACK TO TOP
    ════════════════════════════════════════ */
    .back-to-top {
        position: fixed; bottom: 1.5rem; right: 1.5rem;
        width: 44px; height: 44px;
        background: var(--teal); color: white;
        border: none; border-radius: 50%;
        font-size: 1.1rem; cursor: pointer;
        opacity: 0; visibility: hidden;
        transition: all 0.3s var(--ease);
        box-shadow: 0 4px 14px rgba(13,155,138,0.3);
        z-index: 99;
        display: flex; align-items: center; justify-content: center;
    }
    .back-to-top.visible { opacity: 1; visibility: visible; }
    .back-to-top:hover { background: var(--teal-lt); transform: translateY(-3px); }

    /* ════════════════════════════════════════
       SCROLL REVEAL
    ════════════════════════════════════════ */
    .reveal {
        opacity: 0; transform: translateY(18px);
        transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
    }
    .reveal.visible { opacity: 1; transform: translateY(0); }

    /* ════════════════════════════════════════
       BREADCRUMB MOBILE
    ════════════════════════════════════════ */
    /* Hide HSE link on small screens to prevent wrapping */
    @media (max-width: 479px) {
        .breadcrumb-home, .breadcrumb-sep-1 { display: none; }
    }

    /* ════════════════════════════════════════
       TABLET — 480px+
    ════════════════════════════════════════ */
    @media (min-width: 480px) {
        body { font-size: 17px; }

        .section-dark, .section-light { padding: var(--sp-xl) var(--sp-lg); }
        
        .guide-footer { padding: var(--sp-md) var(--sp-lg); }

        .comparison { grid-template-columns: 1fr 1fr; }
    }

    /* ════════════════════════════════════════
       DESKTOP — 768px+
    ════════════════════════════════════════ */
    @media (min-width: 768px) {
        body { font-size: 18px; }

        .section-dark, .section-light { padding: var(--sp-2xl) 2rem; }
        
        .guide-footer { padding: var(--sp-md) 2rem; }

        .meta-item { font-size: 0.8rem; padding: 0 1.25rem; }

        .key-concept, .example-box {
            padding: 1.75rem 1.75rem 1.75rem 2rem;
        }
        .process-box { padding: var(--sp-lg); }
        .integration-box { padding: 2.5rem; }
        .comparison-item { padding: var(--sp-md); }

        /* Three-column comparison for SRA timing only */
        .comparison-three { grid-template-columns: 1fr 1fr 1fr; }

        .next-section { padding: 3rem 2rem; }
        .next-section-wrap { padding: var(--sp-2xl) 2rem var(--sp-lg); }
    }

    /* ════════════════════════════════════════
       WIDE DESKTOP — 1024px+
    ════════════════════════════════════════ */
    @media (min-width: 1024px) {
    }

    /* ════════════════════════════════════════
       PRINT
    ════════════════════════════════════════ */
    @media print {
        .back-to-top, .reading-progress,
        .next-section-wrap, .guide-footer { display: none; }
        body { background: white; color: var(--ink); font-size: 12pt; }
        .section-dark { background: white; }
        .section-dark p, .section-dark li { color: var(--ink-mid); }
        .section-dark .section-title, .section-dark h3 { color: var(--ink); }
        .key-concept { background: #fff8ec; }
        .process-box, .comparison-item { background: #f9fafb; border-color: #e2e8f0; }
        .pull-quote-text { color: var(--teal); }
        @page { margin: 2cm; }
    }

    /* ════════════════════════════════════════
       V1.5 — MODULE COVER MOMENTS
       Full-viewport atmospheric entry for each
       module. Scrolls naturally — no JS needed.
    ════════════════════════════════════════ */
    .module-cover {
        min-height: 82svh;
        display: flex; flex-direction: column;
        align-items: center; justify-content: center;
        text-align: center;
        padding: calc(var(--sp-xl) + 60px) var(--sp-md) var(--sp-xl);
        position: relative; overflow: hidden;
    }

    /* Atmospheric grid — same as header */
    .module-cover::after {
        content: '';
        position: absolute; inset: 0;
        background-image:
            linear-gradient(rgba(13,155,138,0.035) 1px, transparent 1px),
            linear-gradient(90deg, rgba(13,155,138,0.035) 1px, transparent 1px);
        background-size: 48px 48px;
        mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black 0%, transparent 100%);
        pointer-events: none; z-index: 0;
    }

    /* Radial glow — accent-colour driven */
    .module-cover-glow {
        position: absolute; inset: 0;
        background: radial-gradient(ellipse 65% 55% at 50% 45%,
            var(--cover-glow, rgba(13,155,138,0.07)) 0%,
            transparent 70%);
        pointer-events: none; z-index: 0;
        animation: cover-glow-pulse 6s ease-in-out infinite;
    }
    @keyframes cover-glow-pulse {
        0%,100% { opacity: 0.8; transform: scale(1); }
        50%      { opacity: 1;   transform: scale(1.04); }
    }

    .module-cover-inner {
        position: relative; z-index: 1;
        max-width: min(640px, 100% - 3rem);
    }

    /* Module number eyebrow */
    .mc-eyebrow {
        display: inline-flex; align-items: center; gap: 0.65rem;
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.22em; text-transform: uppercase;
        color: var(--mc-accent, var(--teal-lt));
        margin-bottom: var(--sp-md);
    }
    .mc-eyebrow::before, .mc-eyebrow::after {
        content: ''; display: block;
        width: 2rem; height: 1px;
        background: var(--mc-accent, var(--teal-lt));
        opacity: 0.5;
    }

    /* Module title — cinematic scale */
    .mc-title {
        font-family: var(--font-display);
        font-size: clamp(2.4rem, 9vw, 5rem);
        font-weight: 700; line-height: 1.05;
        letter-spacing: -0.03em; color: var(--white);
        margin-bottom: var(--sp-sm);
        text-shadow:
            0 0 80px var(--cover-glow, rgba(13,155,138,0.18)),
            0 2px 6px rgba(0,0,0,0.5);
    }

    /* Subtitle */
    .mc-subtitle {
        font-family: var(--font-serif);
        font-size: clamp(1rem, 3vw, 1.3rem);
        font-weight: 300; font-style: italic;
        color: rgba(238,242,246,0.55);
        line-height: 1.65; margin-bottom: var(--sp-lg);
        max-width: 520px; margin-left: auto; margin-right: auto;
    }

    /* Commitment line — the emotional hook */
    .mc-commitment {
        font-family: var(--font-serif);
        font-size: clamp(1.05rem, 2.8vw, 1.2rem);
        font-weight: 400; font-style: italic;
        color: var(--mc-accent, var(--teal-lt));
        letter-spacing: 0.02em; line-height: 1.6;
        padding: 0 var(--sp-sm);
        animation: mc-breathe 5s ease-in-out infinite;
        text-shadow: 0 0 24px var(--cover-glow, rgba(13,155,138,0.25));
    }
    @keyframes mc-breathe {
        0%,100% { opacity: 0.8; }
        50%      { opacity: 1; }
    }

    /* Divider rule */
    .mc-rule {
        width: 48px; height: 1px;
        background: linear-gradient(90deg, transparent,
            var(--mc-accent, var(--teal-lt)), transparent);
        margin: var(--sp-lg) auto;
        opacity: 0.45;
    }

    /* Scroll cue */
    .mc-scroll {
        display: flex; flex-direction: column;
        align-items: center; gap: 6px;
        margin-top: var(--sp-xl);
        opacity: 0.45;
    }
    .mc-scroll-line {
        width: 1px; height: 28px;
        background: linear-gradient(180deg, transparent,
            var(--mc-accent, var(--teal-lt)));
    }
    .mc-scroll-arrow {
        font-size: 11px;
        color: var(--mc-accent, var(--teal-lt));
        animation: mc-nudge 2.2s ease-in-out infinite;
    }
    @keyframes mc-nudge {
        0%,100% { transform: translateY(0); }
        50%      { transform: translateY(5px); }
    }

    /* Dark background for cover moments that follow light sections */
    .module-cover-dark { background: var(--deep); }

    /* ════════════════════════════════════════
       V1.5 RESPONSIVE
    ════════════════════════════════════════ */
    @media (min-width: 480px) {
        .module-cover { padding: calc(var(--sp-xl) + 60px) var(--sp-lg) var(--sp-xl); }
    }
    @media (min-width: 768px) {
        .module-cover { padding: calc(5rem + 60px) 2rem var(--sp-xl); }
        .mc-title { font-size: clamp(3rem, 8vw, 5.5rem); }
    }
    @media (prefers-reduced-motion: reduce) {
        .cover-glow-pulse, .mc-breathe, .mc-nudge { animation: none; }
    }

    


.series-wrap img { max-width: 100%; height: auto; display: block; }

    /* Atmospheric background */
    body::before {
        content: '';
        position: fixed; inset: 0; z-index: 0;
        background:
            radial-gradient(ellipse 60% 50% at 20% 30%, rgba(139,92,246,0.05) 0%, transparent 55%),
            radial-gradient(ellipse 50% 40% at 80% 70%, rgba(200,136,58,0.04) 0%, transparent 55%),
            radial-gradient(ellipse 70% 60% at 50% 50%, rgba(13,155,138,0.04) 0%, transparent 60%);
        pointer-events: none;
    }

    /* ════════════════════════════════════════
       ACCESSIBILITY
    ════════════════════════════════════════ */
.series-wrap .skip-link {
        position: absolute; top: -100%; left: var(--sp-sm);
        background: var(--teal); color: #fff;
        font-size: 0.85rem; font-weight: 600;
        padding: 0.5rem 1.25rem; border-radius: 0 0 8px 8px;
        text-decoration: none; z-index: 9999; transition: top 0.2s;
    }
.series-wrap .skip-link:focus { top: 0; }
.series-wrap :focus-visible { outline: 2px solid var(--teal-lt); outline-offset: 3px; }

.series-wrap .visually-hidden {
        position: absolute; width: 1px; height: 1px; padding: 0;
        margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
        white-space: nowrap; border: 0;
    }

    /* ════════════════════════════════════════
       READING PROGRESS
    ════════════════════════════════════════ */
.series-wrap .reading-progress {
        position: fixed; top: 0; left: 0; right: 0;
        height: 2px; z-index: 2000;
        background: rgba(255,255,255,0.06);
    }
.series-wrap .reading-progress-bar {
        height: 100%; width: 0%;
        background: linear-gradient(90deg, var(--teal), var(--amber));
        transition: width 0.1s linear;
    }

    /* ════════════════════════════════════════
       ATMOSPHERIC GRID OVERLAY
    ════════════════════════════════════════ */
.series-wrap .atmosphere {
        position: fixed; inset: 0;
        pointer-events: none; z-index: 0;
    }
.series-wrap .atmosphere::before {
        content: '';
        position: absolute; inset: 0;
        background-image:
            linear-gradient(rgba(13,155,138,0.04) 1px, transparent 1px),
            linear-gradient(90deg, rgba(13,155,138,0.04) 1px, transparent 1px);
        background-size: 48px 48px;
        mask-image: radial-gradient(ellipse 80% 80% at 50% 30%, black 0%, transparent 100%);
    }

    /* ════════════════════════════════════════
       WAVE DIVIDERS
    ════════════════════════════════════════ */
.series-wrap .wave { display: block; width: 100%; line-height: 0; overflow: hidden; }

    /* ════════════════════════════════════════
       SCROLL REVEAL
    ════════════════════════════════════════ */
.series-wrap .reveal {
        opacity: 0; transform: translateY(20px);
        transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
    }
.series-wrap .reveal.visible { opacity: 1; transform: translateY(0); }
.series-wrap .rd1 {transition-delay:.1s} .rd2{transition-delay:.2s}
.series-wrap .rd3 {transition-delay:.3s} .rd4{transition-delay:.4s} .rd5{transition-delay:.5s}

    /* ════════════════════════════════════════
       SECTION THEMES
    ════════════════════════════════════════ */
.series-wrap .section-dark {
        background: var(--deep);
        position: relative; z-index: 1;
    }
.series-wrap .section-light {
        background: var(--paper);
        position: relative; z-index: 1;
    }

    /* Shared section padding — mobile */
.series-wrap .section-pad { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .section-inner { max-width: var(--content); margin: 0 auto; }
.series-wrap .section-inner-text { max-width: var(--content-text); margin: 0 auto; }

    /* Shared section header */
.series-wrap .section-header { text-align: center; margin-bottom: var(--sp-lg); }
.series-wrap .section-tag {
        display: inline-block;
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.2em; text-transform: uppercase;
        color: var(--teal-lt); margin-bottom: var(--sp-sm);
    }
.series-wrap .section-title {
        font-family: var(--font-display);
        font-size: clamp(1.6rem, 6vw, 3rem);
        font-weight: 700; line-height: 1.15;
        letter-spacing: -0.02em;
        margin-bottom: var(--sp-sm);
    }
.series-wrap .section-dark .section-title { color: var(--white); }
.series-wrap .section-light .section-title { color: var(--ink); }
.series-wrap .section-desc {
        font-family: var(--font-serif);
        font-size: clamp(1rem, 2.5vw, 1.2rem);
        line-height: 1.7; max-width: 640px; margin: 0 auto;
    }
.series-wrap .section-dark .section-desc { color: var(--muted); }
.series-wrap .section-light .section-desc { color: var(--ink-mid); }

    /* ════════════════════════════════════════
       HERO SECTION
    ════════════════════════════════════════ */
.series-wrap .hero {
        position: relative; z-index: 1;
        padding: var(--sp-xl) var(--sp-md) var(--sp-lg);
        text-align: center;
    }

    /* Book showcase */
.series-wrap .hero-banner { margin: 0 auto var(--sp-lg); max-width: 1100px; }
.series-wrap .hero-banner-img {
        width: 100%; border-radius: 16px;
        box-shadow: 0 24px 60px rgba(0,0,0,0.7), 0 0 40px rgba(13,155,138,0.15);
        transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
    }
.series-wrap .book-showcase-img:hover {
        transform: translateY(-6px) scale(1.01);
        box-shadow: 0 32px 80px rgba(0,0,0,0.8), 0 0 60px rgba(13,155,138,0.2);
    }

    /* Quote */
.series-wrap .hero-quote {
        max-width: 640px; margin: 0 auto var(--sp-md);
        padding: var(--sp-md) 0;
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }
.series-wrap .hero-quote-mark {
        font-family: var(--font-display); font-size: 4rem;
        color: var(--teal-lt); opacity: 0.2; line-height: 0.5;
        margin-bottom: var(--sp-xs); display: block;
    }
.series-wrap .hero-quote-text {
        font-family: var(--font-serif);
        font-size: clamp(1.1rem, 3vw, 1.4rem);
        line-height: 1.8; color: var(--white); font-style: italic;
    }

    /* Arc framework */
.series-wrap .arc {
        max-width: 760px; margin: var(--sp-lg) auto;
        background: #0c1827;
        border: 1px solid rgba(255,255,255,0.06);
        border-radius: 20px;
        padding: var(--sp-lg) var(--sp-md);
    }
.series-wrap .arc-title {
        font-family: var(--font-display);
        font-size: clamp(1.4rem, 5vw, 2.2rem);
        font-weight: 700; color: var(--white);
        margin-bottom: var(--sp-xs);
    }
.series-wrap .arc-subtitle {
        font-family: var(--font-serif);
        font-size: clamp(0.95rem, 2.5vw, 1.1rem);
        color: var(--muted); margin-bottom: var(--sp-md);
    }
.series-wrap .arc-steps {
        display: flex; flex-direction: column;
        align-items: stretch; gap: 0;
        margin: var(--sp-md) auto;
        max-width: 380px;
    }
.series-wrap .arc-step {
        background: transparent; border: none;
        border-bottom: 0.5px solid rgba(255,255,255,0.08);
        border-radius: 0;
        padding: var(--sp-sm) 0.5rem;
        width: 100%; max-width: none;
        display: grid;
        grid-template-columns: 60px 2.2rem 1fr;
        align-items: center;
        column-gap: 1rem;
        text-align: left;
        transition: opacity 0.3s;
    }
.series-wrap .arc-thumb {
        width: 60px; height: 60px;
        border-radius: 12px;
        object-fit: cover;
        grid-row: span 2;
        align-self: center;
        opacity: 0.92;
    }
.series-wrap .arc-step:last-child { border-bottom: none; }
.series-wrap .arc-step:hover {
        background: transparent;
        opacity: 0.7;
    }
.series-wrap .arc-num {
        font-family: var(--font-display); font-size: 1.15rem;
        font-weight: 600;
        color: var(--teal); -webkit-text-fill-color: var(--teal);
        background: none;
        opacity: 0.6;
        grid-row: span 2;
        align-self: center;
        margin: 0;
    }
.series-wrap .arc-label {
        font-size: 0.62rem; font-weight: 600; letter-spacing: 0.14em;
        text-transform: uppercase; color: var(--muted);
        margin-bottom: 0.1rem;
        opacity: 0.7;
    }
.series-wrap .arc-topic {
        font-family: var(--font-display); font-size: 1rem;
        font-weight: 500; color: var(--white);
    }
.series-wrap .arc-conclusion {
        font-family: var(--font-serif);
        font-size: clamp(0.95rem, 2.5vw, 1.05rem);
        color: var(--muted); line-height: 1.8;
        max-width: 720px; margin: 0 auto;
    }

    /* Unifying graphic */
.series-wrap .unifying { margin: var(--sp-lg) auto 0; max-width: 820px; text-align: center; }
.series-wrap .unifying-tagline {
        font-family: var(--font-display);
        font-size: clamp(1.1rem, 4vw, 1.75rem);
        font-weight: 600; font-style: italic;
        color: var(--white); margin-bottom: var(--sp-sm);
        letter-spacing: -0.01em;
    }
.series-wrap .unifying-img { border-radius: 12px; width: 100%; }

    /* ════════════════════════════════════════
       GUIDE 1 ENTRY — dark section
    ════════════════════════════════════════ */
.series-wrap .guide-entry { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .guide-entry-inner {
        max-width: var(--content);
        margin: 0 auto;
        display: grid;
        grid-template-columns: 1fr;   /* mobile: stack */
        gap: var(--sp-lg);
        align-items: center;
    }
.series-wrap .guide-entry-cover { text-align: center; }
.series-wrap .guide-entry-cover img {
        max-width: 280px; width: 100%;
        border-radius: 16px; margin: 0 auto;
        box-shadow: 0 24px 60px rgba(0,0,0,0.6), 0 0 40px rgba(13,155,138,0.1);
        transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
    }
.series-wrap .guide-entry-cover img:hover {
        transform: translateY(-6px) scale(1.015);
        box-shadow: 0 32px 80px rgba(0,0,0,0.7), 0 0 60px rgba(13,155,138,0.2);
    }
.series-wrap .guide-entry-eyebrow {
        display: inline-flex; align-items: center; gap: 0.6rem;
        font-size: 0.68rem; font-weight: 700;
        letter-spacing: 0.16em; text-transform: uppercase;
        color: var(--emerald); margin-bottom: var(--sp-md);
    }
.series-wrap .guide-entry-eyebrow::before {
        content: ''; width: 1.75rem; height: 1px;
        background: var(--emerald); display: block;
    }
.series-wrap .guide-entry-title {
        font-family: var(--font-display);
        font-size: clamp(1.75rem, 6vw, 3rem);
        font-weight: 700; line-height: 1.1;
        color: var(--white); letter-spacing: -0.025em;
        margin-bottom: var(--sp-md);
    }
.series-wrap .guide-entry-body {
        font-family: var(--font-serif);
        font-size: clamp(1rem, 2.5vw, 1.15rem);
        line-height: 1.8; color: var(--muted);
        margin-bottom: var(--sp-md);
    }
.series-wrap .guide-entry-pull {
        font-family: var(--font-serif);
        font-size: clamp(0.95rem, 2.5vw, 1.1rem);
        line-height: 1.7; color: var(--white);
        padding-left: var(--sp-md);
        border-left: 3px solid var(--teal);
        margin: var(--sp-md) 0; font-style: italic;
    }
.series-wrap .guide-entry-tags {
        display: flex; gap: var(--sp-xs); flex-wrap: wrap;
        margin-bottom: var(--sp-lg);
    }
.series-wrap .guide-tag {
        font-size: 0.78rem; color: var(--muted);
        padding: 0.35rem 0.75rem; border-radius: 100px;
        background: var(--card); border: 1px solid var(--border);
    }
.series-wrap .guide-entry-actions {
        display: flex; flex-direction: column;
        gap: var(--sp-sm); align-items: flex-start;
    }
.series-wrap .btn-primary {
        display: inline-flex; align-items: center; gap: 0.6rem;
        background: var(--teal); color: white;
        padding: 1rem 2rem; border-radius: 6px;
        font-weight: 700; font-size: 0.95rem; letter-spacing: 0.02em;
        text-decoration: none; min-height: 48px;
        transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
        box-shadow: 0 4px 20px rgba(13,155,138,0.3);
        white-space: nowrap;
    }
.series-wrap .btn-primary:hover {
        background: var(--teal-lt); transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(13,155,138,0.4);
    }
.series-wrap .btn-ghost {
        display: inline-flex; align-items: center; gap: 0.4rem;
        color: var(--muted); font-size: 0.9rem; text-decoration: none;
        min-height: 44px; transition: color 0.2s;
    }
.series-wrap .btn-ghost:hover { color: var(--teal-lt); }

    /* ════════════════════════════════════════
       QUESTIONS — light section
    ════════════════════════════════════════ */
.series-wrap .questions { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .questions-inner { max-width: var(--content-text); margin: 0 auto; text-align: center; }
.series-wrap .questions-title {
        font-family: var(--font-display);
        font-size: clamp(1.6rem, 6vw, 2.5rem);
        font-weight: 700; color: var(--ink);
        margin-bottom: var(--sp-lg);
    }
.series-wrap .questions-grid {
        display: grid; grid-template-columns: 1fr;
        gap: var(--sp-sm); margin-bottom: var(--sp-lg); text-align: left;
    }
.series-wrap .question-item {
        background: var(--paper-alt); border: 1px solid var(--border-lt);
        border-radius: 12px; padding: var(--sp-md);
        transition: border-color 0.2s, transform 0.2s;
    }
.series-wrap .question-item:hover { border-color: var(--teal); transform: translateY(-2px); }
.series-wrap .question-text {
        font-family: var(--font-serif);
        font-size: clamp(0.95rem, 2.5vw, 1.05rem);
        line-height: 1.6; color: var(--ink-mid);
    }
.series-wrap .questions-close {
        font-size: clamp(0.95rem, 2.5vw, 1.05rem);
        color: var(--ink-mid); line-height: 1.7; margin-bottom: var(--sp-sm);
    }
.series-wrap .questions-close strong { color: var(--ink); }
.series-wrap .questions-note {
        font-family: var(--font-serif); font-size: 0.95rem;
        color: var(--ink-muted); font-style: italic;
    }

    /* ════════════════════════════════════════
       FEATURES — dark section
    ════════════════════════════════════════ */
.series-wrap .features { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .features-inner { max-width: var(--content); margin: 0 auto; }
.series-wrap .features-grid {
        display: grid; grid-template-columns: 1fr;
        gap: var(--sp-md); margin-top: var(--sp-lg);
    }
.series-wrap .feature-card {
        background: #ffffff; border: 1px solid rgba(0,0,0,0.1);
        border-radius: 16px; padding: var(--sp-md);
        box-shadow: 0 2px 16px rgba(0,0,0,0.07);
        transition: box-shadow 0.3s, transform 0.3s;
    }
.series-wrap .feature-card:hover {
        box-shadow: 0 6px 24px rgba(17,184,164,0.15);
        transform: translateY(-4px);
    }
.series-wrap .feature-num {
        font-family: var(--font-display); font-size: 2rem;
        font-weight: 700; letter-spacing: 0;
        color: var(--teal); display: block; margin-bottom: 0.4rem;
        opacity: 0.6; line-height: 1;
    }
.series-wrap .feature-title {
        font-family: var(--font-display); font-size: 1.25rem;
        font-weight: 600; color: var(--ink); margin-bottom: var(--sp-xs);
    }
.series-wrap .feature-text { color: var(--muted); font-size: 0.95rem; line-height: 1.7; }

    /* ════════════════════════════════════════
       FIVE GUIDES OVERVIEW — dark section
    ════════════════════════════════════════ */
.series-wrap .guides-overview { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .guides-inner { max-width: var(--content); margin: 0 auto; }
.series-wrap .series-showcase { margin: 0 auto var(--sp-lg); max-width: 1100px; }
.series-wrap .series-showcase-img {
        width: 100%; border-radius: 12px;
        box-shadow: 0 20px 50px rgba(0,0,0,0.6), 0 0 30px rgba(13,155,138,0.1);
    }

.series-wrap .guides-grid {
        display: grid; grid-template-columns: 1fr;
        gap: var(--sp-md); margin-top: var(--sp-lg);
    }
.series-wrap .guide-card {
        background: var(--card); border: 1px solid var(--border);
        border-radius: 16px; overflow: hidden;
        transition: background 0.3s, border-color 0.3s, transform 0.3s;
        cursor: pointer; position: relative;
    }
.series-wrap .guide-card:hover {
        background: var(--card-hov); border-color: var(--teal-rule);
        transform: translateY(-6px);
    }
.series-wrap .guide-card-cover { width: 100%; height: auto; display: block; }
.series-wrap .guide-card-body { padding: var(--sp-md); }
.series-wrap .guide-card-num {
        font-size: 0.65rem; font-weight: 700;
        letter-spacing: 0.2em; text-transform: uppercase;
        color: var(--teal-lt); display: block; margin-bottom: var(--sp-xs);
    }
.series-wrap .guide-card-title {
        font-family: var(--font-display); font-size: 1.2rem;
        font-weight: 600; color: var(--white); margin-bottom: var(--sp-xs);
        line-height: 1.3; transition: color 0.2s;
    }
.series-wrap .guide-card:hover .guide-card-title { color: var(--teal-lt); }
.series-wrap .guide-card-desc {
        font-size: 0.9rem; color: var(--muted); line-height: 1.6;
        margin-bottom: var(--sp-sm);
    }
.series-wrap .guide-card-meta {
        display: flex; align-items: center; gap: var(--sp-xs);
        font-size: 0.8rem; color: var(--dim);
        padding-top: var(--sp-sm); border-top: 1px solid var(--border);
    }
.series-wrap .guide-card-cta {
        display: inline-flex; align-items: center; gap: 0.4rem;
        color: var(--teal-lt); font-size: 0.82rem; font-weight: 600;
        margin-top: var(--sp-sm); transition: gap 0.2s;
    }
.series-wrap .guide-card:hover .guide-card-cta { gap: 0.6rem; }

    /* ════════════════════════════════════════
       TESTIMONIAL — light section
    ════════════════════════════════════════ */
.series-wrap .testimonial { padding: var(--sp-xl) var(--sp-md); text-align: center; }
.series-wrap .testimonial-inner { max-width: 720px; margin: 0 auto; }
.series-wrap .testimonial-quote {
        font-family: var(--font-serif);
        font-size: clamp(1.1rem, 3vw, 1.4rem);
        line-height: 1.8; font-style: italic;
        color: var(--ink); margin-bottom: var(--sp-md);
        position: relative; padding-top: var(--sp-lg);
    }
.series-wrap .testimonial-quote::before {
        content: '"'; font-family: var(--font-display);
        font-size: 5rem; color: var(--teal); opacity: 0.2;
        position: absolute; top: 0; left: 50%;
        transform: translateX(-50%); line-height: 1;
    }
.series-wrap .testimonial-source {
        font-size: 0.78rem; font-weight: 700;
        letter-spacing: 0.15em; text-transform: uppercase;
        color: var(--teal);
    }

    /* ════════════════════════════════════════
       WHO IS THIS FOR — dark section
    ════════════════════════════════════════ */
.series-wrap .who-for { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .who-for-inner { max-width: var(--content); margin: 0 auto; }
.series-wrap .who-for-grid {
        display: grid; grid-template-columns: 1fr;
        gap: var(--sp-md); margin-top: var(--sp-lg);
    }
.series-wrap .who-card {
        background: var(--card); border: 1px solid var(--border);
        border-radius: 16px; padding: var(--sp-md);
        position: relative; overflow: hidden;
        transition: background 0.3s, transform 0.3s;
    }
.series-wrap .who-card::before {
        content: ''; position: absolute;
        top: 0; left: 0; width: 3px; height: 100%;
        background: linear-gradient(180deg, var(--teal), var(--amber));
        opacity: 0; transition: opacity 0.3s;
    }
.series-wrap .who-card:hover {
        background: var(--card-hov);
        transform: translateX(4px);
    }
.series-wrap .who-card:hover::before { opacity: 1; }
.series-wrap .who-label {
        font-family: var(--font-display); font-size: 1.25rem;
        font-weight: 600; color: var(--white);
        margin-bottom: var(--sp-sm); transition: color 0.2s;
    }
.series-wrap .who-card:hover .who-label { color: var(--teal-lt); }
.series-wrap .who-desc { color: var(--muted); font-size: 0.92rem; line-height: 1.7; }

    /* ════════════════════════════════════════
       PRICING
    ════════════════════════════════════════ */
.series-wrap .pricing { padding: var(--sp-xl) var(--sp-md); }
.series-wrap .pricing-inner { max-width: 960px; margin: 0 auto; text-align: center; }
.series-wrap .pricing-intro {
        font-family: var(--font-serif);
        font-size: clamp(1rem, 2.5vw, 1.15rem);
        color: var(--muted); line-height: 1.8;
        margin-bottom: var(--sp-lg);
        max-width: 600px; margin-left: auto; margin-right: auto;
    }

    /* Guide 1 complimentary card */
.series-wrap .guide1-card {
        display: flex; align-items: center; gap: 2rem;
        background: rgba(255,255,255,0.04);
        border: 2px solid var(--teal);
        border-radius: 20px;
        padding: 2rem 2.5rem;
        margin-bottom: 2rem;
        text-align: left;
        position: relative;
        overflow: hidden;
        transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
    }
.series-wrap .guide1-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 16px 48px rgba(0,0,0,0.2), 0 0 0 1px var(--teal);
    }
.series-wrap .guide1-card::before {
        content: '';
        position: absolute; inset: 0;
        background: linear-gradient(135deg, rgba(13,155,138,0.08) 0%, transparent 60%);
        pointer-events: none;
    }
.series-wrap .guide1-cover {
        width: 90px; flex-shrink: 0;
        border-radius: 8px; overflow: hidden;
        box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    }
.series-wrap .guide1-cover img { width: 100%; display: block; }
.series-wrap .guide1-text { flex: 1; }
.series-wrap .guide1-badge {
        display: inline-flex; align-items: center; gap: 0.4rem;
        background: rgba(13,155,138,0.15);
        border: 1px solid var(--teal-rule);
        border-radius: 20px;
        padding: 0.25rem 0.75rem;
        font-size: 0.7rem;
        font-weight: 600;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--teal);
        margin-bottom: 0.6rem;
    }
.series-wrap .guide1-badge svg {
        width: 11px; height: 11px;
        stroke: var(--teal); fill: none; stroke-width: 2.5;
    }
.series-wrap .guide1-title {
        font-family: var(--font-display);
        font-size: clamp(1.2rem, 2.5vw, 1.5rem);
        font-weight: 700;
        color: var(--white);
        margin-bottom: 0.4rem;
        line-height: 1.2;
    }
.series-wrap .guide1-desc {
        font-size: 0.875rem;
        color: var(--muted);
        line-height: 1.6;
        margin-bottom: 1rem;
        max-width: 440px;
    }
.series-wrap .guide1-tags {
        display: flex; gap: 0.5rem; flex-wrap: wrap;
        margin-bottom: 1.25rem;
    }
.series-wrap .guide1-tag {
        font-size: 0.72rem;
        color: var(--muted);
        background: rgba(255,255,255,0.06);
        border: 1px solid rgba(255,255,255,0.1);
        border-radius: 20px;
        padding: 0.2rem 0.65rem;
    }
.series-wrap .guide1-cta {
        display: inline-flex; align-items: center; gap: 0.5rem;
        padding: 0.8rem 1.75rem;
        background: var(--teal);
        color: #07111e;
        border-radius: 8px;
        font-size: 0.875rem;
        font-weight: 700;
        letter-spacing: 0.03em;
        text-decoration: none;
        transition: all 0.25s var(--ease);
    }
.series-wrap .guide1-cta:hover {
        background: var(--teal-lt);
        box-shadow: 0 6px 20px rgba(13,155,138,0.3);
        transform: translateY(-1px);
    }
.series-wrap .guide1-price-tag {
        text-align: center; flex-shrink: 0;
    }
.series-wrap .guide1-price {
        font-family: var(--font-display);
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--teal);
        line-height: 1;
    }
.series-wrap .guide1-price-note {
        font-size: 0.7rem;
        color: var(--muted);
        margin-top: 0.2rem;
        letter-spacing: 0.04em;
    }

    /* Four guide cards */
.series-wrap .guide-cards-header {
        text-align: center;
        margin: 2.5rem 0 1.25rem;
    }
.series-wrap .guide-cards-header h3 {
        font-family: var(--font-display);
        font-size: 1.1rem;
        color: var(--white);
        font-weight: 600;
        margin-bottom: 0.3rem;
    }
.series-wrap .guide-cards-header p {
        font-size: 0.85rem;
        color: var(--muted);
    }
.series-wrap .guide-cards-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
        margin-bottom: 1.25rem;
    }
.series-wrap .guide-mini-card {
        background: rgba(255,255,255,0.04);
        border: 1px solid rgba(255,255,255,0.08);
        border-radius: 12px;
        overflow: hidden;
        text-align: left;
        transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
    }
.series-wrap .guide-mini-card:hover {
        transform: translateY(-3px);
        border-color: var(--accent, rgba(255,255,255,0.15));
    }
.series-wrap .guide-mini-accent { height: 3px; background: var(--accent, var(--teal)); }
.series-wrap .guide-mini-cover {
        width: 100%; aspect-ratio: 3/4;
        overflow: hidden;
    }
.series-wrap .guide-mini-cover img {
        width: 100%; height: 100%;
        object-fit: cover; object-position: top;
        display: block;
        transition: transform 0.4s var(--ease);
    }
.series-wrap .guide-mini-card:hover .guide-mini-cover img { transform: scale(1.04); }
.series-wrap .guide-mini-body { padding: 0.9rem 1rem 1rem; }
.series-wrap .guide-mini-label {
        font-size: 0.65rem;
        font-weight: 600;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--accent, var(--teal));
        margin-bottom: 0.3rem;
    }
.series-wrap .guide-mini-title {
        font-family: var(--font-display);
        font-size: 0.9rem;
        font-weight: 700;
        color: var(--white);
        line-height: 1.25;
        margin-bottom: 0.3rem;
    }
.series-wrap .guide-mini-desc {
        font-size: 0.75rem;
        color: var(--muted);
        line-height: 1.5;
    }

    /* Group purchase banner */
.series-wrap .group-purchase {
        background: linear-gradient(135deg, rgba(13,155,138,0.1) 0%, rgba(13,155,138,0.04) 100%);
        border: 1.5px solid var(--teal-rule);
        border-radius: 16px;
        padding: 1.75rem 2rem;
        display: flex; align-items: center; gap: 2rem;
        flex-wrap: wrap;
        margin-bottom: 2rem;
        text-align: left;
    }
.series-wrap .group-purchase-text { flex: 1; min-width: 220px; }
.series-wrap .group-purchase-eyebrow {
        font-size: 0.7rem;
        font-weight: 600;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--teal);
        margin-bottom: 0.4rem;
        display: flex; align-items: center; gap: 0.5rem;
    }
.series-wrap .group-purchase-eyebrow::before {
        content: '';
        display: inline-block;
        width: 16px; height: 1.5px;
        background: var(--teal);
    }
.series-wrap .group-purchase-title {
        font-family: var(--font-display);
        font-size: clamp(1.1rem, 2vw, 1.35rem);
        font-weight: 700;
        color: var(--white);
        margin-bottom: 0.3rem;
        line-height: 1.25;
    }
.series-wrap .group-purchase-desc {
        font-size: 0.85rem;
        color: var(--muted);
        line-height: 1.6;
    }
.series-wrap .group-purchase-action {
        display: flex; flex-direction: column;
        align-items: flex-end; gap: 0.4rem;
        flex-shrink: 0;
    }
.series-wrap .group-price {
        font-family: var(--font-display);
        font-size: 2.4rem;
        font-weight: 700;
        color: var(--teal);
        line-height: 1;
    }
.series-wrap .group-price-note {
        font-size: 0.72rem;
        color: var(--muted);
        text-align: right;
    }
.series-wrap .group-cta {
        display: inline-flex; align-items: center; gap: 0.5rem;
        padding: 0.85rem 1.75rem;
        background: var(--teal);
        color: #07111e;
        border-radius: 8px;
        font-size: 0.875rem;
        font-weight: 700;
        letter-spacing: 0.03em;
        text-decoration: none;
        transition: all 0.25s var(--ease);
        white-space: nowrap;
    }
.series-wrap .group-cta:hover {
        background: var(--teal-lt);
        box-shadow: 0 6px 20px rgba(13,155,138,0.3);
        transform: translateY(-1px);
    }
.series-wrap .group-cta svg {
        width: 14px; height: 14px;
        stroke: currentColor; fill: none; stroke-width: 2.5;
        transition: transform 0.2s;
    }
.series-wrap .group-cta:hover svg { transform: translateX(3px); }

    /* Trust row */
.series-wrap .trust {
        display: flex; justify-content: center;
        flex-wrap: wrap; gap: var(--sp-md);
        margin: var(--sp-lg) 0;
    }
.series-wrap .trust-item {
        display: flex; align-items: center; gap: var(--sp-xs);
        font-size: 0.85rem; color: var(--ink-muted);
    }
.series-wrap .trust-item svg {
        width: 15px; height: 15px;
        stroke: var(--teal); stroke-width: 1.75; fill: none;
    }

    /* Diagnostic strip */
.series-wrap .diagnostic-strip {
        display: flex;
        align-items: center;
        gap: 1.5rem;
        margin-top: var(--sp-lg);
        padding: 1rem 1.5rem;
        background: rgba(13,155,138,0.08);
        border: 1px solid var(--teal-rule);
        border-radius: 12px;
    }
.series-wrap .diagnostic-strip-line {
        flex: 1; height: 1px;
        background: var(--teal-rule);
    }
.series-wrap .diagnostic-strip-content {
        display: flex; flex-direction: column;
        align-items: center; gap: 0.3rem;
        text-align: center;
    }
.series-wrap .diagnostic-strip-cta {
        font-size: 0.85rem; font-weight: 600;
        color: var(--teal); text-decoration: none;
        transition: color 0.2s;
    }
.series-wrap .diagnostic-strip-cta:hover { color: var(--teal-lt); }
.series-wrap .diagnostic-strip-label {
        font-size: 0.75rem; color: var(--ink-muted);
    }

    /* Responsive */
    @media (min-width: 900px) {
        .pricing { padding: var(--sp-xl) var(--sp-lg); }
    }
    @media (min-width: 1200px) {
        .pricing { padding: var(--sp-2xl) 2rem; }
    }
    @media (max-width: 860px) {
        .guide-cards-grid { grid-template-columns: repeat(2, 1fr); }
        .guide1-card { flex-wrap: wrap; }
        .guide1-price-tag { width: 100%; text-align: left; }
        .group-purchase-action { align-items: flex-start; }
    }
    @media (max-width: 560px) {
        .guide-cards-grid { grid-template-columns: repeat(2, 1fr); }
        .guide1-cover { width: 70px; }
        .group-purchase { flex-direction: column; gap: 1.25rem; }
        .guide1-card { padding: 1.5rem; gap: 1.25rem; }
        .guide1-title { font-size: 1.1rem; }
        .group-purchase-action { width: 100%; }
        .group-price { font-size: 2rem; }
    }
    @media (max-width: 400px) {
        .guide-cards-grid { grid-template-columns: 1fr; }
        .guide1-card { flex-direction: column; align-items: flex-start; }
        .guide1-cover { width: 80px; }
        .guide1-price-tag { display: flex; align-items: center; gap: 0.75rem; }
        .guide-mini-title { font-size: 0.85rem; }
        .guide-mini-desc { font-size: 0.72rem; }
    }

        /* ════════════════════════════════════════
       FOOTER — dark section
    ════════════════════════════════════════ */
.series-wrap .footer {
        background: var(--deep); padding: var(--sp-xl) var(--sp-md) var(--sp-lg);
        text-align: center; border-top: 1px solid var(--border);
        position: relative; z-index: 1;
    }
.series-wrap .footer-inner { max-width: var(--content); margin: 0 auto; }
.series-wrap .footer-title {
        font-family: var(--font-display); font-size: 1.4rem;
        font-style: italic; color: var(--white); margin-bottom: var(--sp-xs);
    }
.series-wrap .footer-tagline { color: var(--muted); font-size: 0.88rem; margin-bottom: var(--sp-lg); }
.series-wrap .footer-links {
        display: flex; justify-content: center; flex-wrap: wrap;
        gap: var(--sp-md); margin-bottom: var(--sp-lg);
    }
.series-wrap .footer-link {
        color: var(--muted); text-decoration: none; font-size: 0.88rem;
        min-height: 44px; display: inline-flex; align-items: center;
        transition: color 0.2s;
    }
.series-wrap .footer-link:hover { color: var(--teal-lt); }
.series-wrap .footer-copy {
        font-size: 0.8rem; color: var(--dim);
        padding-top: var(--sp-md); border-top: 1px solid var(--border);
    }
.series-wrap .footer-copy a { color: var(--muted); text-decoration: none; }
.series-wrap .footer-copy a:hover { color: var(--teal-lt); }

    /* ════════════════════════════════════════
       SCROLL TO TOP
    ════════════════════════════════════════ */
.series-wrap .back-to-top {
        position: fixed; bottom: 1.5rem; right: 1.5rem;
        width: 44px; height: 44px;
        background: var(--teal); border: none; border-radius: 50%;
        display: flex; align-items: center; justify-content: center;
        cursor: pointer; opacity: 0; visibility: hidden;
        transition: all 0.3s var(--ease);
        box-shadow: 0 4px 14px rgba(13,155,138,0.3); z-index: 99;
    }
.series-wrap .back-to-top svg { width: 20px; height: 20px; stroke: white; stroke-width: 2.5; }
.series-wrap .back-to-top.visible { opacity: 1; visibility: visible; }
.series-wrap .back-to-top:hover { background: var(--teal-lt); transform: translateY(-3px); }

    /* ════════════════════════════════════════
       BREAKPOINTS — enhance upward
    ════════════════════════════════════════ */

    /* Tablet — 480px+ */
    @media (min-width: 480px) {
        body { font-size: 17px; }
        .hero { padding: var(--sp-xl) var(--sp-lg) var(--sp-lg); }
        .guide-entry { padding: var(--sp-xl) var(--sp-lg); }
        .questions { padding: var(--sp-xl) var(--sp-lg); }
        .features { padding: var(--sp-xl) var(--sp-lg); }
        .guides-overview { padding: var(--sp-xl) var(--sp-lg); }
        .testimonial { padding: var(--sp-xl) var(--sp-lg); }
        .who-for { padding: var(--sp-xl) var(--sp-lg); }
        .pricing { padding: var(--sp-xl) var(--sp-lg); }
        .footer { padding: var(--sp-xl) var(--sp-lg) var(--sp-lg); }
        .arc-steps { flex-direction: row; flex-wrap: wrap; justify-content: center; }
        .arc-step { width: auto; min-width: 140px; flex: 1; max-width: 180px; }
        .questions-grid { grid-template-columns: 1fr 1fr; }
        .features-grid { grid-template-columns: 1fr 1fr; }
        .guides-grid { grid-template-columns: 1fr 1fr; }
        .who-for-grid { grid-template-columns: 1fr 1fr; }
        .pricing-tiers { grid-template-columns: 1fr 1fr; }
        .guide-entry-actions { flex-direction: row; align-items: center; }
    }

    /* Desktop — 768px+ */
    @media (min-width: 768px) {
        body { font-size: 18px; }
        :root { --sp-xl: 5rem; }

        .hero { padding: 5rem 2rem 4rem; }
        .guide-entry { padding: var(--sp-2xl) 2rem; }
        .questions { padding: var(--sp-2xl) 2rem; }
        .features { padding: var(--sp-2xl) 2rem; }
        .guides-overview { padding: var(--sp-2xl) 2rem; }
        .testimonial { padding: var(--sp-2xl) 2rem; }
        .who-for { padding: var(--sp-2xl) 2rem; }
        .pricing { padding: var(--sp-2xl) 2rem; }
        .footer { padding: var(--sp-2xl) 2rem var(--sp-xl); }

        .book-showcase { max-width: 760px; }
        .arc-steps { flex-wrap: nowrap; }

        .guide-entry-inner {
            grid-template-columns: 1fr 1.5fr;
            gap: var(--sp-2xl);
        }
        .guide-entry-cover img { max-width: 360px; }

        .features-grid { grid-template-columns: repeat(3, 1fr); }
        .guides-grid { grid-template-columns: repeat(3, 1fr); }
        .who-for-grid { grid-template-columns: repeat(3, 1fr); }

        .feature-card { padding: var(--sp-lg); }
        .guide-card-body { padding: var(--sp-lg); }
        .who-card { padding: var(--sp-lg); }
        .tier { padding: var(--sp-xl) var(--sp-lg); }
    }

    /* Wide — 1024px+ */
    @media (min-width: 1024px) {
        .guides-grid { grid-template-columns: repeat(5, 1fr); }
        .who-for-grid { grid-template-columns: repeat(5, 1fr); }
    }

    /* Print */
    @media print {
        .atmosphere, .reading-progress, .back-to-top { display: none; }
        body { background: white; color: var(--ink); }
    }

    /* ════════════════════════════════════════
       PHILOSOPHY SECTION
    ════════════════════════════════════════ */
.series-wrap .philosophy {
        padding: var(--sp-xl) var(--sp-md);
        text-align: center;
        position: relative; z-index: 1;
    }
.series-wrap .philosophy-inner {
        max-width: min(680px, 100% - 3rem);
        margin: 0 auto;
    }
.series-wrap .philosophy-rule {
        width: 40px; height: 1px;
        background: linear-gradient(90deg, transparent, rgba(13,155,138,0.4), transparent);
        margin: 0 auto var(--sp-lg);
    }
.series-wrap .philosophy-text {
        font-family: var(--font-serif);
        font-size: clamp(1.1rem, 2.8vw, 1.3rem);
        font-weight: 300;
        line-height: 1.9;
        color: #b8cad6;
        margin-bottom: 1.6em;
    }
.series-wrap .philosophy-text:last-of-type { margin-bottom: 0; }
.series-wrap .philosophy-text strong { color: var(--white); font-weight: 500; }
.series-wrap .philosophy-text em { color: var(--teal-lt); font-style: italic; }
.series-wrap .philosophy-close {
        font-family: var(--font-display);
        font-size: clamp(1.3rem, 4vw, 1.9rem);
        font-weight: 600; font-style: italic;
        color: var(--white);
        margin-top: var(--sp-xl);
        letter-spacing: -0.01em;
        line-height: 1.4;
    }
.series-wrap .philosophy-close::after {
        content: "";
        display: block;
        width: 48px; height: 2px;
        background: var(--teal-lt);
        margin: var(--sp-md) auto 0;
        opacity: 0.6;
    }
    @media (min-width: 480px) {
        .philosophy { padding: var(--sp-xl) var(--sp-lg); }
    }
    @media (min-width: 768px) {
        .philosophy { padding: var(--sp-2xl) 2rem; }
    }

    

.series-wrap .pricing-bridge {
        text-align: center;
        font-family: var(--font-serif);
        font-style: italic;
        font-size: clamp(1rem, 2.5vw, 1.2rem);
        color: var(--muted);
        max-width: 480px;
        margin: 0 auto 1.5rem;
        line-height: 1.6;
        padding-top: 0.5rem;
    }



    /* ═══ SKIP LINK ═══ */
    .skip-link{position:absolute;top:-100px;left:0;z-index:9999;padding:8px 16px;background:var(--teal);color:var(--deep);font-size:0.8rem;text-decoration:none;}
    .skip-link:focus{top:0;}

    /* ═══ TAB BAR ═══ */
    .g-tabbar{position:fixed;top:0;left:0;right:0;z-index:200;display:flex;justify-content:center;align-items:center;padding:10px 16px;background:var(--deep);border-bottom:1px solid rgba(255,255,255,0.07);}
    .tab-pill{display:flex;align-items:center;background:rgba(11,28,48,0.97);border:1px solid rgba(255,255,255,0.18);border-radius:999px;padding:4px 5px;gap:1px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;max-width:calc(100vw - 32px);}
    .tab-pill::-webkit-scrollbar{display:none;}
    .g-tab{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:999px;border:none;background:transparent;color:rgba(255,255,255,0.5);font-family:var(--font-sans);font-size:0.67rem;font-weight:600;letter-spacing:0.1em;text-transform:uppercase;cursor:pointer;white-space:nowrap;flex-shrink:0;position:relative;transition:color 0.2s,background 0.2s;}
    .g-tab:hover{color:rgba(255,255,255,0.8);background:rgba(255,255,255,0.05);}
    .g-tab.active{color:#fff;background:rgba(255,255,255,0.1);font-weight:700;}
    .g-tab.active::after{content:'';position:absolute;bottom:3px;left:13px;right:13px;height:2px;background:var(--ta,var(--teal-lt));border-radius:2px;}
    .t-dot{width:5px;height:5px;border-radius:50%;background:var(--ta,var(--teal-lt));flex-shrink:0;opacity:0.55;transition:opacity 0.2s;}
    .g-tab.active .t-dot{opacity:1;}
    @media(max-width:480px){.g-tab{padding:6px 9px;font-size:0.6rem;}}

    /* ═══ PANELS ═══ */
    body{padding-top:66px;}
    .guide-panel{display:none;}
    .guide-panel.active{display:block;animation:fade-in-tab 0.4s var(--ease, cubic-bezier(0.25, 0.46, 0.45, 0.94)) forwards;}
    @keyframes fade-in-tab {
        from { opacity: 0; transform: translateY(8px); }
        to { opacity: 1; transform: translateY(0); }
    }

    /* ═══ MODULE HERO ═══ */
    .mod-hero{width:100%;line-height:0;}
    .mod-hero-img{width:100%;height:auto;display:block;}

    /* ═══ GUIDE HERO ═══ */
    .guide-hero{width:100%;line-height:0;}
    .guide-hero-img{width:100%;height:auto;display:block;}

    /* ═══ GUIDE 1 INTRO ═══ */
    .g1-eyebrow{font-family:var(--font-sans);font-size:0.65rem;font-weight:600;letter-spacing:0.22em;text-transform:uppercase;color:var(--teal);margin-bottom:0.75rem;}
    .g1-title{font-family:var(--font-display);font-size:clamp(1.8rem,5vw,2.8rem);font-weight:700;color:var(--ink);line-height:1.1;margin-bottom:0.3rem;}
    .g1-sub{font-family:var(--font-serif);font-style:italic;font-size:clamp(1rem,2.5vw,1.15rem);color:var(--ink-mid);margin-bottom:1.5rem;}
    .g1-rule{width:48px;height:1px;background:rgba(0,0,0,0.15);margin-bottom:1.5rem;}
    .g1-lead{font-family:var(--font-serif);font-size:clamp(1.05rem,3vw,1.2rem);font-style:italic;color:var(--ink);line-height:1.7;margin-bottom:1rem;}
    .g1-body{font-family:var(--font-sans);font-size:clamp(0.9rem,2.5vw,1rem);color:var(--ink-mid);line-height:1.8;}

    /* ═══ INTRO — STAGED OPENING ═══ */
    @keyframes intro-rise{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}
    .intro-seq{margin:0.5rem 0 2.25rem;}
    .intro-step{
        display:flex;align-items:baseline;gap:1rem;
        padding:0.55rem 0;
        font-family:var(--font-serif);
        font-size:clamp(1.15rem,3.2vw,1.5rem);
        line-height:1.4;color:var(--ink);
    }
    .intro-step .step-mark{
        font-family:var(--font-sans);font-size:0.7rem;font-weight:600;
        letter-spacing:0.12em;color:var(--teal);
        flex-shrink:0;width:2.4ch;text-align:right;
        transform:translateY(-0.15em);opacity:0.7;
    }
    .intro-step .step-text{flex:1;}
    .intro-step .step-text em{font-style:italic;color:var(--teal);}
    .intro-step:last-child .step-text{font-weight:500;}

    .intro-pivot{
        font-family:var(--font-display);
        font-size:clamp(1.9rem,6vw,2.9rem);
        font-weight:700;font-style:italic;
        color:var(--teal);line-height:1.05;
        margin:0 0 1.75rem;
    }
    .intro-answer{
        position:relative;
        padding-left:1.4rem;
        margin-bottom:1.5rem;
    }
    .intro-answer::before{
        content:'';position:absolute;left:0;top:0.35em;bottom:0.35em;width:3px;
        background:linear-gradient(180deg,var(--teal),transparent);border-radius:3px;
    }
    .intro-answer p{font-family:var(--font-sans);font-size:clamp(1rem,2.6vw,1.12rem);
        color:var(--ink-mid);line-height:1.75;margin:0 0 0.85rem;}
    .intro-answer p:last-child{margin-bottom:0;}
    .intro-answer strong{color:var(--ink);}
    .intro-literal{
        font-family:var(--font-serif);font-style:italic;
        font-size:clamp(1.05rem,2.8vw,1.2rem);
        color:var(--ink);line-height:1.55;
        margin:2rem 0 0;padding-top:1.5rem;
        border-top:0.5px solid rgba(0,0,0,0.1);
    }
    .intro-literal .accent{color:var(--teal);font-style:normal;font-weight:600;}

    /* Staged reveal — fires only when the guide panel is shown (.intro-animate),
       so navigation into the panel plays it rather than a hidden page-load.
       Default state is fully visible: if the trigger never runs, nothing is stuck. */
    .guide-panel.intro-animate .intro-step,
    .guide-panel.intro-animate .intro-pivot,
    .guide-panel.intro-animate .intro-answer,
    .guide-panel.intro-animate .intro-literal{
        opacity:0;animation:intro-rise 0.6s var(--ease,cubic-bezier(0.4,0,0.2,1)) forwards;
    }
    .guide-panel.intro-animate .intro-step:nth-child(1){animation-delay:0.05s;}
    .guide-panel.intro-animate .intro-step:nth-child(2){animation-delay:0.30s;}
    .guide-panel.intro-animate .intro-step:nth-child(3){animation-delay:0.55s;}
    .guide-panel.intro-animate .intro-step:nth-child(4){animation-delay:0.80s;}
    .guide-panel.intro-animate .intro-pivot{animation-delay:1.10s;}
    .guide-panel.intro-animate .intro-answer{animation-delay:1.35s;}
    .guide-panel.intro-animate .intro-literal{animation-delay:1.55s;}
    @media(prefers-reduced-motion:reduce){
        .guide-panel.intro-animate .intro-step,
        .guide-panel.intro-animate .intro-pivot,
        .guide-panel.intro-animate .intro-answer,
        .guide-panel.intro-animate .intro-literal{animation:none;opacity:1;}
    }

    /* ═══ MODULE LIST ═══ */
    .gmod-item{display:flex;align-items:center;gap:1rem;padding:1rem 0.5rem;border-bottom:0.5px solid rgba(255,255,255,0.08);cursor:pointer;border-radius:6px;margin:0 -0.5rem;transition:background 0.2s;}
    .gmod-item:first-of-type{border-top:0.5px solid rgba(255,255,255,0.08);}
    .gmod-item:hover{background:rgba(255,255,255,0.04);}
    .gmod-dot{width:8px;height:8px;border-radius:50%;background:var(--ma,var(--teal));flex-shrink:0;transition:transform 0.2s;}
    .gmod-item:hover .gmod-dot{transform:scale(1.4);}
    .gmod-text{flex:1;display:flex;flex-direction:column;gap:2px;}
    .gmod-label{font-family:var(--font-sans);font-size:0.62rem;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;color:var(--ma,var(--teal));opacity:0.85;}
    .gmod-title{font-family:var(--font-display);font-size:clamp(1rem,2.5vw,1.15rem);font-weight:600;color:var(--white);line-height:1.2;}
    .gmod-arrow{font-size:0.9rem;color:var(--ma,var(--teal));opacity:0.5;transition:opacity 0.2s,transform 0.2s;flex-shrink:0;}
    .gmod-item:hover .gmod-arrow{opacity:1;transform:translateX(3px);}

    /* ═══ PARCHMENT TOC ═══ */
    .parchment{background:#f5f0e8;color:#1a0e05;padding-bottom:0;}
    .parchment-header{text-align:center;padding:3rem 1.5rem 2.5rem;border-bottom:0.5px solid rgba(26,14,5,0.12);max-width:860px;margin:0 auto;}
    .parch-eyebrow{font-family:var(--font-sans);font-size:0.62rem;font-weight:600;letter-spacing:0.38em;text-transform:uppercase;color:#7a6030;margin-bottom:0.6rem;}
    .parch-title{font-family:var(--font-display);font-size:clamp(1.9rem,5vw,3rem);font-weight:400;letter-spacing:0.06em;color:#0a1628;line-height:1.1;margin-bottom:0.7rem;}
    .parch-sub{font-family:var(--font-serif);font-style:italic;font-size:clamp(0.95rem,2.5vw,1.1rem);color:rgba(26,14,5,0.58);line-height:1.6;max-width:480px;margin:0 auto;}
    .parch-rule{display:flex;align-items:center;gap:14px;padding:1.75rem 1.5rem;max-width:860px;margin:0 auto;}
    .parch-rule-line{flex:1;height:0.5px;background:rgba(26,14,5,0.12);}
    .parch-rule-label{font-family:var(--font-sans);font-size:0.62rem;font-weight:600;letter-spacing:0.32em;text-transform:uppercase;color:#7a6030;opacity:0.75;white-space:nowrap;}
    .toc-entry{display:flex;align-items:stretch;border-bottom:0.5px solid rgba(26,14,5,0.1);position:relative;overflow:hidden;max-width:860px;margin:0 auto;transition:background 0.22s;}
    .toc-entry:first-of-type{border-top:0.5px solid rgba(26,14,5,0.1);}
    .toc-open{cursor:pointer;}
    .toc-open:hover{background:rgba(26,14,5,0.02);}
    .toc-locked{cursor:default;}
    .toc-img{width:130px;flex-shrink:0;overflow:hidden;position:relative;min-height:160px;}
    .toc-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform 0.4s;}
    .toc-open:hover .toc-img img{transform:scale(1.04);}
    .toc-badge{position:absolute;top:8px;left:6px;background:var(--teal);color:var(--deep);font-family:var(--font-sans);font-size:0.55rem;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;padding:3px 7px;border-radius:3px;}
    .toc-lockicon{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(26,14,5,0.1);}
    .toc-lockicon svg{width:22px;height:22px;stroke:rgba(26,14,5,0.4);stroke-width:1.5;fill:none;}
    .toc-body{flex:1;padding:1.5rem 1.5rem 1.5rem 1.25rem;display:flex;flex-direction:column;gap:5px;}
    .toc-eyebrow{display:flex;align-items:center;gap:7px;font-family:var(--font-sans);font-size:0.62rem;font-weight:600;letter-spacing:0.22em;text-transform:uppercase;color:#7a6030;}
    .toc-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0;}
    .toc-title{font-family:var(--font-display);font-size:clamp(1.05rem,2.8vw,1.3rem);font-weight:600;color:#0a1628;line-height:1.2;}
    .toc-sub{font-family:var(--font-serif);font-style:italic;font-size:0.88rem;color:rgba(26,14,5,0.55);line-height:1.5;}
    .toc-dek{font-family:var(--font-serif);font-size:0.88rem;color:rgba(26,14,5,0.65);line-height:1.65;}
    .toc-mods{font-family:var(--font-sans);font-size:0.6rem;letter-spacing:0.04em;color:rgba(26,14,5,0.38);line-height:1.7;}
    .toc-meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:0.5rem;}
    .toc-time{font-family:var(--font-sans);font-size:0.6rem;letter-spacing:0.1em;color:rgba(26,14,5,0.35);}
    .toc-cta{font-family:var(--font-sans);font-size:0.6rem;font-weight:700;letter-spacing:0.18em;text-transform:uppercase;color:rgba(26,14,5,0.35);opacity:0;transition:opacity 0.2s;}
    .toc-open:hover .toc-cta{opacity:1;}
    .toc-buy-btn{display:inline-flex;align-items:center;margin-top:0.75rem;padding:0.55rem 1.1rem;border-radius:6px;border:1px solid rgba(13,155,138,0.35);background:transparent;color:var(--teal);font-family:var(--font-sans);font-size:0.65rem;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;cursor:pointer;transition:all 0.22s;}
    .toc-buy-btn:hover{background:var(--teal);color:#f5f0e8;}
    .parch-purchase{background:var(--deep);}
    .parch-wave{height:56px;width:100%;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 960 56' preserveAspectRatio='none'%3E%3Cpath d='M0,0 L960,0 L960,28 Q720,4 480,28 T0,28 Z' fill='%23f5f0e8'/%3E%3Cpath d='M0,28 Q240,4 480,28 T960,28 L960,56 L0,56 Z' fill='%2307111e'/%3E%3C/svg%3E") no-repeat center/100% 100%;}
    .parch-purchase-inner{max-width:860px;margin:0 auto;padding:1.75rem 1.5rem 3rem;display:flex;align-items:center;justify-content:space-between;gap:1.5rem;flex-wrap:wrap;}
    .pp-label{font-family:var(--font-sans);font-size:0.62rem;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;color:var(--teal);margin-bottom:0.3rem;}
    .pp-tagline{font-family:var(--font-display);font-size:clamp(1rem,2.5vw,1.3rem);font-weight:600;color:var(--white);line-height:1.3;}
    .pp-action{display:flex;align-items:center;gap:1.25rem;flex-shrink:0;}
    .pp-price{font-family:var(--font-display);font-size:2.2rem;font-weight:700;color:var(--teal-lt);line-height:1;}
    .pp-btn{display:inline-flex;align-items:center;padding:0.85rem 1.75rem;border-radius:8px;background:var(--teal);color:var(--deep);font-family:var(--font-sans);font-size:0.78rem;font-weight:700;letter-spacing:0.06em;border:none;cursor:pointer;transition:all 0.22s;white-space:nowrap;}
    .pp-btn:hover{background:var(--teal-lt);}

    /* ═══ PANEL FOOTER ═══ */
    .panel-footer{display:flex;align-items:center;justify-content:space-between;padding:1.5rem 1.25rem 2.5rem;background:var(--deep);border-top:1px solid rgba(255,255,255,0.07);flex-wrap:wrap;gap:0.75rem;}
    .pf-left{display:flex;align-items:center;gap:0.75rem;flex-wrap:wrap;}
    .pf-right{margin-left:auto;}
    .pf-back{font-family:var(--font-sans);font-size:0.62rem;font-weight:500;letter-spacing:0.08em;text-transform:uppercase;color:rgba(255,255,255,0.3);background:none;border:none;cursor:pointer;transition:color 0.2s;padding:0;}
    .pf-back:hover{color:rgba(255,255,255,0.7);}
    .pf-prev,.pf-next{display:inline-flex;align-items:center;gap:0.5rem;padding:0.7rem 1.4rem;border-radius:7px;font-family:var(--font-sans);font-size:0.78rem;font-weight:700;letter-spacing:0.06em;background:transparent;cursor:pointer;transition:all 0.22s;text-decoration:none;border:1px solid rgba(255,255,255,0.15);}
    .pf-prev{color:var(--pa,var(--muted));}
    .pf-prev:hover{border-color:var(--pa);background:rgba(255,255,255,0.04);}
    .pf-next{color:var(--na,var(--teal-lt));}
    .pf-next:hover{border-color:var(--na);background:rgba(255,255,255,0.04);}

    /* ═══ INTEGRATION ═══ */
    .int-header{text-align:center;padding:3rem 1.5rem 2rem;max-width:860px;margin:0 auto;}
    .int-eyebrow{font-family:var(--font-sans);font-size:0.65rem;font-weight:600;letter-spacing:0.22em;text-transform:uppercase;color:var(--teal);margin-bottom:0.5rem;}
    .int-title{font-family:var(--font-display);font-size:clamp(2rem,6vw,3.5rem);font-weight:700;color:var(--white);line-height:1.1;margin-bottom:0.75rem;}
    .int-sub{font-family:var(--font-serif);font-style:italic;font-size:clamp(1rem,2.5vw,1.2rem);color:var(--muted);line-height:1.6;}
    .int-close{font-family:var(--font-serif);font-size:clamp(1rem,2.5vw,1.15rem);color:var(--ink-mid);line-height:1.7;font-style:italic;}

    /* ═══ SERIES WRAP ═══ */
    .series-wrap{background:var(--deep);}

    /* ═══ READING PROGRESS ═══ */
    .reading-progress-bar{transition:background 0.35s;}
    .mc-scroll{display:none;}


    /* Series panel — reveal elements always visible (no scroll trigger needed) */
    .series-wrap .reveal { opacity: 1 !important; transform: none !important; }


    /* ═══ LIGHT SECTION TEXT COLOURS ═══ */
    .section-light                         { color: var(--ink); }
    .section-light p                       { color: var(--ink-mid); }
    .section-light h2, .section-light h3,
    .section-light h4                      { color: var(--ink); }
    .section-light li                      { color: var(--ink-mid); }
    .section-light strong                  { color: var(--ink); }
    .section-light .key-concept            { border-color: var(--teal-rule); background: var(--teal-dim); }
    .section-light .key-concept-label      { color: var(--teal); }
    .section-light .key-concept p          { color: var(--ink-mid); }
    .section-light .process-box            { border-color: var(--border-lt); background: var(--paper-alt); }
    .section-light .process-box h4         { color: var(--ink); }
    .section-light .process-box p,
    .section-light .process-box li         { color: var(--ink-mid); }
    .section-light .pull-quote             { border-color: var(--teal-rule); }
    .section-light .pull-quote-text        { color: var(--ink); }
    .section-light .further-reading        { border-color: var(--border-lt); }
    .section-light .further-reading h4     { color: var(--ink); }
    .section-light .example-box            { border-color: var(--border-lt); background: var(--paper-alt); }
    .section-light .example-box p          { color: var(--ink-mid); }
    .section-light .example-label          { color: var(--teal); }
    .section-light .takeaway               { border-color: var(--border-lt); }
    .section-light .takeaway h4            { color: var(--ink); }
    .section-light .diagram-wrap img       { border-color: var(--border-lt); }





    /* ═══ SERIES PAGE — minimal overrides, let series CSS handle the rest ═══ */
    .series-wrap .question-text  { color: var(--ink-mid) !important; }
    .series-wrap .testimonial-quote { color: rgba(238,242,246,0.88) !important; }


/* ── Launch hero additions ── */
.series-wrap .hero-eyebrow {
        font-family: var(--font-sans);
        font-size: 0.72rem; font-weight: 600;
        letter-spacing: 0.16em; text-transform: uppercase;
        color: var(--teal-lt); opacity: 0.8;
        margin: 0 auto var(--sp-sm);
    }
.series-wrap .hero-headline {
        font-family: var(--font-display);
        font-size: clamp(2.4rem, 8vw, 4.5rem);
        font-weight: 700; line-height: 1.02;
        letter-spacing: -0.02em; color: var(--white);
        margin: 0 auto var(--sp-sm); max-width: 16ch;
    }
.series-wrap .hero-deck {
        font-family: var(--font-serif);
        font-size: clamp(1.05rem, 2.6vw, 1.35rem);
        line-height: 1.7; color: var(--muted);
        max-width: 50ch; margin: 0 auto var(--sp-lg);
    }
.series-wrap .hero-engine { max-width: 1080px; margin: 0 auto var(--sp-lg); }
.series-wrap .hero-engine-img {
        width: 100%; border-radius: 16px;
        box-shadow: 0 24px 60px rgba(0,0,0,0.7), 0 0 50px rgba(13,155,138,0.12);
    }
.series-wrap .hero-cta-row {
        display: flex; flex-wrap: wrap; gap: var(--sp-sm);
        align-items: center; justify-content: center; margin-bottom: var(--sp-xs);
    }
.series-wrap .hero-primary-cta {
        display: inline-flex; align-items: center; gap: 0.5rem;
        font-family: var(--font-sans); font-size: 1rem; font-weight: 600;
        color: var(--deep); background: var(--teal-lt);
        padding: 0.85rem 1.75rem; border-radius: 10px; text-decoration: none;
        transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
        box-shadow: 0 8px 24px rgba(17,184,164,0.25);
    }
.series-wrap .hero-primary-cta:hover {
        transform: translateY(-2px); box-shadow: 0 12px 32px rgba(17,184,164,0.35);
    }
.series-wrap .hero-secondary-cta {
        font-family: var(--font-sans); font-size: 0.9rem; font-weight: 500;
        color: var(--teal-lt); text-decoration: none;
        border-bottom: 1px solid var(--teal-rule); padding-bottom: 2px; transition: color 0.2s;
    }
.series-wrap .hero-secondary-cta:hover { color: var(--white); }
.series-wrap .hero-cta-note {
        font-family: var(--font-sans); font-size: 0.82rem;
        color: var(--muted); opacity: 0.7; margin-top: 0.25rem;
    }
.series-wrap .midpage-cta {
        text-align: center; margin-top: var(--sp-xl);
        display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
    }
.series-wrap .midpage-cta-note {
        font-family: var(--font-sans); font-size: 0.85rem;
        color: var(--muted); opacity: 0.8; max-width: 42ch; line-height: 1.6;
    }