:root {
    --navy: #0B2545;
    --teal: #1A7FA0;
    --teal-light: #5BB8D4;
    --teal-glow: rgba(26,127,160,0.15);
    --cream: #F5F1EB;
    --white: #ffffff;
    --gray: #6b7280;
    --dark: #1a1a2e;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    background: var(--navy);
    color: var(--white);
    font-family: 'DM Sans', sans-serif;
    font-weight: 300;
    overflow-x: hidden;
  }

  /* ── HERO ── */
  .hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: 80px 40px;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(26,127,160,0.18) 0%, transparent 70%);
    pointer-events: none;
  }

  .hero-eyebrow {
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--teal-light);
    margin-bottom: 24px;
    position: relative;
    z-index: 2;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.2s forwards;
  }

  .hero-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(3.5rem, 6vw, 5.5rem);
    font-weight: 900;
    line-height: 1.0;
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.4s forwards;
  }

  .hero-title em {
    font-style: italic;
    color: var(--teal-light);
  }

  .hero-subtitle {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: 700;
    font-style: italic;
    color: rgba(255,255,255,0.5);
    margin-bottom: 32px;
    position: relative;
    z-index: 2;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.55s forwards;
  }

  .hero-desc {
    font-size: 1.05rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.7);
    max-width: 640px;
    margin: 0 auto 48px;
    position: relative;
    z-index: 2;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.7s forwards;
  }

  .hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--teal);
    color: white;
    padding: 16px 32px;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
    position: relative;
    z-index: 2;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.85s forwards;
  }

  .hero-cta:hover { background: var(--teal-light); transform: translateX(4px); }
  .hero-cta svg { transition: transform 0.2s; }
  .hero-cta:hover svg { transform: translateX(4px); }

  /* ── STATS STRIP ── */
  .stats {
    background: var(--teal);
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    position: relative;
    z-index: 10;
  }

  .stat-item {
    padding: 40px 40px;
    border-right: 1px solid rgba(255,255,255,0.2);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: background 0.3s;
  }
  .stat-item:last-child { border-right: none; }
  .stat-item:hover { background: rgba(0,0,0,0.1); }

  .stat-num {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.8rem, 4vw, 4rem);
    font-weight: 900;
    color: white;
    display: block;
    line-height: 1;
    margin-bottom: 8px;
  }

  .stat-label {
    font-size: 0.8rem;
    font-weight: 400;
    color: rgba(255,255,255,0.8);
    letter-spacing: 0.05em;
    line-height: 1.4;
    max-width: 220px;
    margin: 0 auto;
  }

  /* ── SECTIONS WRAPPER ── */
  .sections {
    background: var(--cream);
    color: var(--navy);
  }

  /* ── SECTION CARD ── */
  .section-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 480px;
    border-bottom: 1px solid rgba(11,37,69,0.08);
  }

  .section-card.reverse { direction: rtl; }
  .section-card.reverse > * { direction: ltr; }

  .section-visual {
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy);
    padding: 48px 40px;
  }

  .section-content {
    padding: 60px 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .section-num {
    font-family: 'Playfair Display', serif;
    font-size: 5rem;
    font-weight: 900;
    color: rgba(26,127,160,0.1);
    line-height: 1;
    margin-bottom: -16px;
  }

  .section-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.6rem, 2.5vw, 2.2rem);
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 16px;
    line-height: 1.2;
  }

  .section-rule {
    width: 48px;
    height: 3px;
    background: var(--teal);
    margin-bottom: 20px;
  }

  .section-text {
    font-size: 1rem;
    line-height: 1.75;
    color: #3d4d60;
    margin-bottom: 24px;
  }

  .bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .bullets li {
    font-size: 0.925rem;
    color: #4a5568;
    line-height: 1.6;
    padding-left: 1.2em;
    text-indent: -1.2em;
  }

  .bullets li::before {
    content: '\25B8';
    color: var(--teal);
    font-size: 0.8rem;
    margin-right: 0.4em;
  }

  .callout {
    margin-top: 24px;
    padding: 16px 20px;
    background: rgba(26,127,160,0.08);
    border-left: 3px solid var(--teal);
    font-size: 0.9rem;
    color: #2d4a5e;
    line-height: 1.6;
  }

  .callout strong { color: var(--navy); }

  /* ── VISUAL PANELS ── */
  .diagram-flow {
    text-align: center;
    color: var(--white);
  }

  .diagram-flow .flow-step {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 3vw, 3rem);
    font-weight: 900;
    display: block;
    margin: 8px 0;
    line-height: 1.2;
  }

  .diagram-flow .flow-arrow {
    font-size: 1.6rem;
    color: var(--teal-light);
    display: block;
    margin: 4px 0;
    opacity: 0.7;
  }

  .diagram-flow .flow-catalyst {
    display: inline-block;
    margin-top: 24px;
    padding: 10px 28px;
    border: 2px solid var(--teal-light);
    border-radius: 6px;
    font-family: 'DM Sans', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--teal-light);
  }

  .diagram-flow .flow-label {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    margin-top: 8px;
    display: block;
  }

  .visual-text-panel {
    text-align: center;
    color: var(--white);
  }

  .visual-text-panel .vt-line {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.6rem, 2.5vw, 2.4rem);
    font-weight: 900;
    display: block;
    line-height: 1.3;
    margin: 6px 0;
  }

  .visual-text-panel .vt-arrow {
    font-size: 1.4rem;
    color: var(--teal-light);
    display: block;
    margin: 4px 0;
    opacity: 0.7;
  }

  .visual-text-panel .vt-highlight {
    color: var(--teal-light);
  }

  /* ── TEXT-ONLY GRID ── */
  .mini-grid {
    background: var(--cream);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border-bottom: 1px solid rgba(11,37,69,0.08);
  }

  .mini-card {
    padding: 56px 60px;
    border-right: 1px solid rgba(11,37,69,0.08);
    border-bottom: 1px solid rgba(11,37,69,0.08);
    position: relative;
    overflow: hidden;
    transition: background 0.3s;
  }

  .mini-card:hover { background: rgba(26,127,160,0.04); }
  .mini-card:nth-child(even) { border-right: none; }

  .mini-card .section-num { font-size: 4rem; margin-bottom: -10px; }

  /* ── COMPARISON TABLE ── */
  .comparison {
    background: var(--navy);
    padding: 100px 80px;
  }

  .comparison-header {
    text-align: center;
    margin-bottom: 60px;
  }

  .comparison-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    margin-bottom: 12px;
  }

  .comparison-header p {
    color: rgba(255,255,255,0.5);
    font-size: 1rem;
  }

  .cmp-table {
    max-width: 860px;
    margin: 0 auto;
    border-collapse: collapse;
    width: 100%;
  }

  .cmp-table thead th {
    padding: 16px 24px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
  }

  .cmp-table thead th:first-child {
    text-align: left;
    color: rgba(255,255,255,0.4);
  }

  .cmp-table thead th:nth-child(2) {
    color: rgba(255,255,255,0.4);
  }

  .cmp-table thead th:nth-child(3) {
    background: var(--teal);
    color: white;
    border-radius: 8px 8px 0 0;
  }

  .cmp-table tbody tr {
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: background 0.2s;
  }

  .cmp-table tbody tr:hover { background: rgba(255,255,255,0.04); }

  .cmp-table tbody td {
    padding: 18px 24px;
    font-size: 0.95rem;
  }

  .cmp-table tbody td:first-child {
    color: rgba(255,255,255,0.75);
  }

  .cmp-table tbody td:nth-child(2) {
    text-align: center;
    color: rgba(255,255,255,0.35);
    font-size: 1.1rem;
  }

  .cmp-table tbody td:nth-child(3) {
    text-align: center;
    background: rgba(26,127,160,0.12);
    font-size: 1.2rem;
  }

  .good { color: #4ade80; font-weight: 500; }
  .bad { color: #f87171; }

  /* ── REFERENCES ── */
  .ref-accordion {
    margin-top: 16px;
    border: none;
  }

  .ref-toggle {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--teal);
    cursor: pointer;
    letter-spacing: 0.05em;
    list-style: none;
    padding: 4px 0;
  }

  .ref-toggle::-webkit-details-marker { display: none; }

  .ref-toggle::before {
    content: '+ ';
    font-weight: 700;
  }

  details[open] .ref-toggle::before {
    content: '- ';
  }

  .ref-list {
    margin-top: 8px;
    padding-left: 20px;
    font-size: 0.8rem;
    color: #5a6a7a;
    line-height: 1.7;
  }

  .ref-list li {
    margin-bottom: 4px;
  }

  .ref-num {
    color: var(--teal);
    font-size: 0.7rem;
    vertical-align: super;
  }

  .sections .cite {
    color: var(--teal);
    opacity: 0.75;
  }

  /* ── FOOTER ── */
  .footer {
    background: #06172e;
    border-top: 2px solid var(--teal);
    padding: 80px;
    text-align: center;
  }

  .footer-headline {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.8rem, 3vw, 2.8rem);
    font-weight: 700;
    font-style: italic;
    color: var(--teal-light);
    margin-bottom: 16px;
  }

  .footer-sub {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    margin-bottom: 40px;
  }

  .footer-divider {
    width: 60px;
    height: 2px;
    background: var(--teal);
    margin: 32px auto;
  }

  /* ── ANIMATIONS ── */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  /* Scroll reveal */
  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ── RESPONSIVE ── */
  @media (max-width: 900px) {
    .hero { min-height: auto; padding: 60px 24px; }
    .stats { grid-template-columns: 1fr; }
    .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.2); }
    .section-card, .section-card.reverse { grid-template-columns: 1fr; direction: ltr; }
    .section-visual { min-height: 280px; }
    .section-content { padding: 40px 32px; }
    .mini-grid { grid-template-columns: 1fr; }
    .mini-card { border-right: none; padding: 40px 32px; }
    .comparison { padding: 60px 24px; }
    .footer { padding: 60px 32px; }
    .cmp-table { font-size: 0.85rem; }
    .cmp-table thead th, .cmp-table tbody td { padding: 12px 12px; }
  }