/* ═══════════════════════════════════════════════════════════════
   BRIEF — Editorial Scholarly Design System
   Cormorant Garamond (display) + IBM Plex Sans (body) + IBM Plex Mono (data)
   Light parchment palette with dark hero section
   ═══════════════════════════════════════════════════════════════ */

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes breathe {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 1; }
}

:root {
    /* Light palette — warm paper & ink */
    --ivory:        #FDFBF7;
    --parchment:    #F4F0E8;
    --cream:        #EDE8DD;
    --white:        #FFFFFF;

    --ink:          #1C1917;
    --ink-medium:   #44403C;
    --ink-light:    #57534E;
    --ink-faint:    #78716C;

    /* Warm hero — amber/saffron glow */
    --hero-bg:      #2C1810;
    --hero-text:    #FFF8EE;

    /* Accents */
    --gold:         #B8860B;
    --gold-light:   #D4A84B;
    --gold-dim:     #8B7A48;
    --gold-glow:    rgba(184, 134, 11, 0.06);

    --crimson:      #9B2226;
    --sage:         #4A6741;
    --sage-bg:      #EEF3EC;
    --amber:        #92400E;
    --amber-bg:     #FEF3C7;

    /* Structure */
    --rule:         #D6D0C4;
    --rule-light:   #E8E4DD;
    --shadow:       rgba(28, 25, 23, 0.06);

    /* Type */
    --font-display: 'Cormorant Garamond', 'Georgia', serif;
    --font-body:    'IBM Plex Sans', -apple-system, sans-serif;
    --font-mono:    'IBM Plex Mono', 'Menlo', monospace;

    --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
    --radius:       4px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 400;
    line-height: 1.7;
    color: var(--ink);
    background: var(--ivory);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

::selection { background: var(--gold-light); color: var(--ink); }

a {
    color: var(--gold);
    text-decoration: none;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color 0.2s;
}
a:hover { color: var(--crimson); }

/* ═══════════════════════════════════════════════════════════════
   LANDING NAV
   ═══════════════════════════════════════════════════════════════ */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(44, 24, 16, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.landing-nav-mark {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: #FFEED4;
    padding-left: 0.2em;
}
.landing-nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.landing-nav-link {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: rgba(255,238,212,0.7);
    text-decoration: none;
    transition: color 0.2s;
}
.landing-nav-link:hover { color: #FFEED4; }
.landing-nav-cta {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: var(--hero-bg);
    background: #F5B446;
    padding: 0.45rem 1.2rem;
    border-radius: var(--radius);
    text-decoration: none;
    transition: background 0.2s;
}
.landing-nav-cta:hover { background: #FFEED4; color: var(--hero-bg); }

/* ═══════════════════════════════════════════════════════════════
   HERO — Dark section with constellation
   ═══════════════════════════════════════════════════════════════ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse 120% 100% at 50% 40%, #5C3A1E 0%, #3D2210 40%, var(--hero-bg) 100%);
    color: var(--hero-text);
}

#constellation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    display: block;
}

.hero-grain {
    position: absolute;
    inset: 0;
    z-index: 1;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px;
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 680px;
    padding: 0 24px;
}

.hero-eyebrow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    animation: fadeUp 0.8s var(--ease-out) both 0.2s;
}
.hero-eyebrow-line {
    display: block;
    width: 40px;
    height: 1px;
    background: rgba(245, 180, 70, 0.4);
}
.hero-eyebrow-text {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: rgba(245, 180, 70, 0.9);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 12vw, 10rem);
    font-weight: 300;
    letter-spacing: 0.3em;
    line-height: 0.9;
    color: #FFEED4;
    margin-bottom: 32px;
    padding-left: 0.3em;
    white-space: nowrap;
}
.hero-title-word {
    display: inline-block;
    animation: fadeUp 0.6s var(--ease-out) both;
}
.hero-title-word:nth-child(1) { animation-delay: 0.4s; }
.hero-title-word:nth-child(2) { animation-delay: 0.48s; }
.hero-title-word:nth-child(3) { animation-delay: 0.56s; }
.hero-title-word:nth-child(4) { animation-delay: 0.64s; }
.hero-title-word:nth-child(5) { animation-delay: 0.72s; }

.hero-subtitle {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 300;
    font-style: italic;
    line-height: 1.8;
    color: rgba(255, 238, 212, 0.85);
    margin-bottom: 56px;
    animation: fadeUp 0.8s var(--ease-out) both 0.9s;
}

.hero-metrics {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin-bottom: 64px;
}
.hero-metric {
    text-align: center;
    animation: fadeUp 0.6s var(--ease-out) both;
}
.hero-metric:nth-child(1) { animation-delay: 1.1s; }
.hero-metric:nth-child(3) { animation-delay: 1.2s; }
.hero-metric:nth-child(5) { animation-delay: 1.3s; }

.hero-metric-num {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: #F5B446;
    line-height: 1;
}
.hero-metric-plus { font-size: 1.6rem; }
.hero-metric-unit {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255, 238, 212, 0.7);
    margin-top: 4px;
    display: block;
}
.hero-metric-sep {
    width: 1px;
    height: 32px;
    background: rgba(245, 180, 70, 0.2);
}

.hero-scroll {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(245, 180, 70, 0.8);
    text-decoration: none;
    transition: color 0.3s;
    animation: fadeUp 0.6s var(--ease-out) both 1.5s;
}
.hero-scroll:hover { color: #F5B446; }
.hero-scroll-text {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}
.hero-scroll-arrow { animation: breathe 2.5s ease-in-out infinite; }

/* ═══════════════════════════════════════════════════════════════
   PILLARS — Horizontal Strip (light)
   ═══════════════════════════════════════════════════════════════ */
.pillars {
    background: var(--parchment);
    border-bottom: 1px solid var(--rule);
    overflow-x: auto;
    scrollbar-width: none;
}
.pillars::-webkit-scrollbar { display: none; }

.pillars-track {
    display: flex;
    min-width: max-content;
    margin: 0 auto;
    justify-content: center;
}

.pillar {
    flex: 0 0 auto;
    width: 180px;
    padding: 32px 24px;
    border-right: 1px solid var(--rule);
    text-align: center;
    cursor: default;
    transition: background 0.3s;
}
.pillar:last-child { border-right: none; }
.pillar:hover { background: var(--gold-glow); }

.pillar-num {
    display: block;
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 300;
    color: var(--gold);
    margin-bottom: 8px;
    line-height: 1;
}

.pillar-name {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-medium);
    line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════════
   RHYTHM — How It Works (light)
   ═══════════════════════════════════════════════════════════════ */
.rhythm {
    padding: 120px 24px;
    background: var(--ivory);
}

.rhythm-inner {
    max-width: 900px;
    margin: 0 auto;
}

.rhythm-heading {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 300;
    color: var(--ink);
    margin-bottom: 72px;
    line-height: 1.3;
}

.rhythm-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--rule);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
}

.rhythm-step {
    background: var(--white);
    padding: 32px 24px;
    transition: background 0.3s;
}
.rhythm-step:hover { background: var(--parchment); }

.rhythm-time {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--gold);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.rhythm-label {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 12px;
}

.rhythm-step p {
    font-size: 0.82rem;
    color: var(--ink-light);
    line-height: 1.7;
}

/* ═══════════════════════════════════════════════════════════════
   DASHBOARD — Light warm background
   ═══════════════════════════════════════════════════════════════ */
.dash {
    padding: 96px 24px 64px;
    background: var(--white);
    border-top: 1px solid var(--rule);
}

.dash-inner {
    max-width: 960px;
    margin: 0 auto;
}

.dash-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--ink);
    margin-bottom: 40px;
}

.dash-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--ink);
    letter-spacing: 0.02em;
}

.dash-date {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
    margin-top: 4px;
}

.dash-select {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 6px 12px;
    background: var(--ivory);
    color: var(--ink-medium);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    cursor: pointer;
}

/* ─── Metrics ────────────────────────────────────────────────── */
.metrics {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1px;
    background: var(--rule);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 40px;
}

.metric {
    background: var(--ivory);
    padding: 24px 16px;
    text-align: center;
}

.metric-val {
    display: block;
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 400;
    color: var(--ink);
    line-height: 1;
}

.metric-lbl {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-top: 6px;
}

/* ─── Paper of the Day ───────────────────────────────────────── */
.potd {
    background: var(--ivory);
    border: 1px solid var(--rule);
    border-left: 4px solid var(--gold);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: 0 1px 3px var(--shadow);
}

.potd-badge {
    font-family: var(--font-mono);
    font-size: 0.58rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 16px;
}

.potd-title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: 8px;
}

.potd-meta {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--ink-faint);
    margin-bottom: 16px;
}

.potd-summary {
    font-size: 0.95rem;
    color: var(--ink-medium);
    line-height: 1.8;
    margin-bottom: 16px;
}

.potd-why {
    background: var(--sage-bg);
    border-left: 3px solid var(--sage);
    padding: 12px 16px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 16px;
    font-size: 0.88rem;
    color: var(--ink-medium);
}

.potd-links {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}
.potd-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--ink-medium);
    padding: 5px 14px;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    transition: all 0.2s;
}
.potd-links a:hover {
    color: var(--white);
    background: var(--ink);
    border-color: var(--ink);
}

/* ─── Cards ──────────────────────────────────────────────────── */
.card {
    background: var(--ivory);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: 0 1px 3px var(--shadow);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ink);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--rule-light);
    margin-bottom: 24px;
}

/* ─── Regulatory ─────────────────────────────────────────────── */
.regulatory-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--rule-light);
}
.regulatory-item:last-child { border-bottom: none; }

.urgency-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.urgency-URGENT { background: var(--crimson); color: white; }
.urgency-IMPORTANT { background: var(--amber-bg); color: var(--amber); border: 1px solid rgba(146, 64, 14, 0.2); }
.urgency-INFORMATIVE { background: var(--parchment); color: var(--ink-light); }

/* ─── Filters ────────────────────────────────────────────────── */
.pillar-filters {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.pillar-btn {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 5px 14px;
    border: 1px solid var(--rule);
    border-radius: 2px;
    background: transparent;
    color: var(--ink-light);
    cursor: pointer;
    transition: all 0.2s;
}
.pillar-btn:hover { border-color: var(--ink-medium); color: var(--ink-medium); }
.pillar-btn.active {
    background: var(--ink);
    color: var(--white);
    border-color: var(--ink);
}

/* ─── Paper Cards ────────────────────────────────────────────── */
.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.paper-card {
    background: var(--white);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.paper-card:hover {
    border-color: var(--gold);
    box-shadow: 0 2px 8px var(--shadow);
}

.paper-card-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: 6px;
}

.paper-card-meta {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--ink-faint);
    margin-bottom: 10px;
}

.paper-card-summary {
    font-size: 0.85rem;
    color: var(--ink-medium);
    line-height: 1.7;
    margin-bottom: 12px;
}

.score-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 2px;
}
.score-high { background: var(--sage-bg); color: var(--sage); }
.score-medium { background: var(--amber-bg); color: var(--amber); }
.score-low { background: var(--parchment); color: var(--ink-faint); }

.pillar-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.55rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 2px;
    background: var(--parchment);
    color: var(--ink-light);
    margin-left: 4px;
}

/* ─── Opportunities ──────────────────────────────────────────── */
.opp-card {
    background: var(--white);
    border: 1px solid var(--rule);
    border-left: 3px solid var(--crimson);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 20px;
    margin-bottom: 12px;
}
.opp-card strong {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    display: block;
    margin-bottom: 8px;
}
.opp-card p {
    font-size: 0.85rem;
    color: var(--ink-medium);
    margin-bottom: 4px;
}

/* ─── LinkedIn ───────────────────────────────────────────────── */
.tab-bar {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.tab-btn {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 6px 16px;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: transparent;
    color: var(--ink-light);
    cursor: pointer;
    transition: all 0.2s;
}
.tab-btn.active {
    background: var(--ink);
    color: var(--white);
    border-color: var(--ink);
}

.linkedin-post {
    background: var(--white);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    padding: 28px;
}

.linkedin-hook {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.5;
    margin-bottom: 16px;
}

.linkedin-body {
    white-space: pre-wrap;
    font-size: 0.9rem;
    color: var(--ink-medium);
    line-height: 1.8;
    margin-bottom: 16px;
}

.linkedin-hashtags {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--gold);
    margin-bottom: 16px;
}

.linkedin-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--rule-light);
}
.linkedin-meta span {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--ink-faint);
}

.copy-btn {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 7px 18px;
    background: var(--ink);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}
.copy-btn:hover { background: var(--gold); }
.copy-btn.copied { background: var(--sage); }

/* ─── Table ──────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }

th {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--ink);
    color: var(--ink-light);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}
th:hover { color: var(--ink); }

td {
    font-size: 0.85rem;
    padding: 10px 12px;
    border-bottom: 1px solid var(--rule-light);
    color: var(--ink-medium);
}
td a {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--gold);
}
td a:hover { color: var(--crimson); }

/* ═══════════════════════════════════════════════════════════════
   HOW TO GET STARTED
   ═══════════════════════════════════════════════════════════════ */
.started-section {
    padding: 80px 24px;
    background: var(--ivory);
    border-top: 1px solid var(--rule);
}
.started-inner { max-width: 900px; margin: 0 auto; }
.started-heading {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--ink);
    text-align: center;
    margin-bottom: 3rem;
}
.started-steps {
    display: flex;
    align-items: flex-start;
    gap: 0;
    justify-content: center;
}
.started-step {
    flex: 1;
    max-width: 200px;
    text-align: center;
    padding: 0 1rem;
}
.started-num {
    width: 36px;
    height: 36px;
    line-height: 36px;
    border-radius: 50%;
    background: var(--gold);
    color: white;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    margin: 0 auto 0.75rem;
}
.started-step h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 0.4rem;
}
.started-step p {
    font-size: 0.78rem;
    color: var(--ink-light);
    line-height: 1.5;
}
.started-arrow {
    color: var(--rule);
    font-size: 1.3rem;
    margin-top: 0.5rem;
    padding: 0 0.3rem;
}
@media (max-width: 700px) {
    .started-steps { flex-direction: column; align-items: center; gap: 1.5rem; }
    .started-arrow { transform: rotate(90deg); }
}

/* ═══════════════════════════════════════════════════════════════
   WHAT IS BRIEF — Flip Card
   ═══════════════════════════════════════════════════════════════ */
.what-section {
    padding: 96px 24px;
    background: var(--parchment);
    border-top: 1px solid var(--rule);
}
.what-inner {
    max-width: 520px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
}
.flip-card {
    width: 100%;
    max-width: 480px;
    height: 360px;
    perspective: 1000px;
    cursor: pointer;
}
.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    transform-style: preserve-3d;
}
@media (hover: hover) {
    .flip-card:hover .flip-card-inner {
        transform: rotateY(180deg);
    }
}
.flip-card-inner.flipped {
    transform: rotateY(180deg);
}
.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2.5rem;
}
.flip-card-front {
    background: var(--white);
    border: 1px solid var(--rule);
    box-shadow: 0 4px 24px rgba(28,25,23,0.06);
}
.flip-card-back {
    background: var(--ink);
    color: var(--ivory);
    transform: rotateY(180deg);
    text-align: left;
    align-items: flex-start;
    justify-content: flex-start;
    overflow-y: auto;
}
.flip-card-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.75rem;
}
.flip-card-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 300;
    letter-spacing: 0.25em;
    color: var(--ink);
    padding-left: 0.25em;
    margin-bottom: 1.5rem;
}
.flip-card-hint {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    color: var(--ink-faint);
    animation: breathe 2.5s ease-in-out infinite;
}
.flip-card-back-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 500;
    color: #F5B446;
    margin-bottom: 1.25rem;
    line-height: 1.3;
}
.flip-card-back p {
    font-size: 0.82rem;
    line-height: 1.7;
    color: rgba(253,251,247,0.8);
    margin-bottom: 0.8rem;
}
.flip-card-back em {
    color: #F5B446;
    font-style: normal;
    font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════
   EXAMPLE BRIEF LINK
   ═══════════════════════════════════════════════════════════════ */
.example-section {
    padding: 64px 24px;
    background: var(--ivory);
    text-align: center;
}
.example-inner {
    max-width: 600px;
    margin: 0 auto;
}
.example-heading {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 400;
    color: var(--ink);
    margin-bottom: 0.5rem;
}
.example-sub {
    font-size: 0.88rem;
    color: var(--ink-light);
    margin-bottom: 1.5rem;
}
.example-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--white);
    border: 1px solid var(--rule);
    border-left: 3px solid var(--gold);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.2s;
}
.example-link:hover {
    border-color: var(--gold);
    box-shadow: 0 2px 12px rgba(28,25,23,0.08);
}
.example-link-label {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--ink);
}
.example-link-arrow {
    font-size: 1.2rem;
    color: var(--gold);
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════ */
.foot {
    background: var(--parchment);
    padding: 80px 24px;
    text-align: center;
    border-top: 1px solid var(--rule);
}

.foot-inner { max-width: 400px; margin: 0 auto; }

.foot-mark {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 300;
    letter-spacing: 0.3em;
    color: var(--ink-medium);
    margin-bottom: 8px;
    padding-left: 0.3em;
}

.foot-tagline {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 300;
    font-style: italic;
    color: var(--ink-medium);
    margin-bottom: 24px;
}

.foot-rule {
    width: 40px;
    height: 1px;
    background: var(--rule);
    margin: 0 auto 24px;
}

.foot-fine {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.05em;
    color: var(--ink-light);
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .hero-title { letter-spacing: 0.15em; padding-left: 0.15em; font-size: clamp(2.5rem, 10vw, 5rem); }
    .hero-metrics { flex-direction: column; gap: 16px; }
    .hero-metric-sep { width: 32px; height: 1px; }
    .hero-subtitle { font-size: 1rem; }

    .landing-nav { padding: 0.75rem 1rem; }
    .landing-nav-mark { font-size: 0.9rem; }
    .landing-nav-link { font-size: 0.6rem; }
    .landing-nav-cta { font-size: 0.6rem; padding: 0.35rem 0.8rem; }

    .rhythm-steps { grid-template-columns: 1fr 1fr; }
    .rhythm-heading { font-size: 1.5rem; margin-bottom: 2.5rem; }

    .metrics { grid-template-columns: repeat(3, 1fr); }

    .dash-header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .papers-grid { grid-template-columns: 1fr; }

    .flip-card { height: 300px; }
    .flip-card-title { font-size: 2.5rem; }
    .flip-card-back { padding: 1.5rem; }
    .flip-card-back p { font-size: 0.75rem; }

    .example-inner { padding: 0 0.5rem; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.2rem; letter-spacing: 0.1em; padding-left: 0.1em; }

    .rhythm-steps { grid-template-columns: 1fr; }
    .metrics { grid-template-columns: 1fr 1fr; }

    .flip-card { height: 260px; }
    .flip-card-title { font-size: 2rem; }
    .flip-card-back-title { font-size: 1rem; }
    .flip-card-back p { font-size: 0.7rem; margin-bottom: 0.5rem; }
}