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

    /* ─── Tokens ─────────────────────────────────────────────── */
    :root {
      --blue-50:  #e8f0fe;
      --blue-100: #c5d8fd;
      --blue-400: #4285f4;
      --blue-600: #1a73e8;
      --blue-700: #1557b0;
      --blue-900: #0d3880;

      --grey-50:  #f8f9fa;
      --grey-100: #f1f3f4;
      --grey-200: #e8eaed;
      --grey-400: #bdc1c6;
      --grey-600: #80868b;
      --grey-800: #3c4043;
      --grey-900: #202124;

      --white: #ffffff;
      --ink: #202124;
      --ink-soft: #3c4043;
      --ink-muted: #5f6368;

      --shadow-1: 0 1px 3px rgba(60,64,67,.12), 0 1px 2px rgba(60,64,67,.08);
      --shadow-2: 0 2px 6px rgba(60,64,67,.14), 0 1px 3px rgba(60,64,67,.10);
      --shadow-3: 0 4px 12px rgba(60,64,67,.16), 0 2px 4px rgba(60,64,67,.10);

      --radius-sm: 4px;
      --radius:    8px;
      --radius-lg: 12px;
      --radius-xl: 16px;

      --max-w: 1080px;
    }

    /* ─── Base ───────────────────────────────────────────────── */
    body {
      font-family: 'DM Sans', 'Roboto', -apple-system, sans-serif;
      font-size: 18px;
      line-height: 1.65;
      color: var(--ink);
      background: var(--white);
    }
    img { max-width: 100%; display: block; }
    a { color: var(--blue-600); text-decoration: none; }

    h1, h2 {
      font-family: 'Playfair Display', Georgia, serif;
      line-height: 1.2;
      font-weight: 800;
    }
    h3, h4 {
      font-family: 'DM Sans', 'Roboto', sans-serif;
      line-height: 1.25;
      font-weight: 700;
    }
    h1 { font-size: clamp(2.6rem, 5.5vw, 4rem); letter-spacing: -0.02em; }
    h2 { font-size: clamp(1.9rem, 3.5vw, 2.6rem); letter-spacing: -0.015em; }
    h3 { font-size: clamp(1.25rem, 2.2vw, 1.55rem); font-weight: 500; }

    p { color: var(--ink-soft); line-height: 1.7; }

    .container { max-width: var(--max-w); margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px); }
    .section { padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px); }
    .text-center { text-align: center; }

    /* ─── NAV ────────────────────────────────────────────────── */
    nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 200;
      background: var(--white);
      border-bottom: 1px solid var(--grey-200);
      box-shadow: var(--shadow-1);
    }
    .nav-inner {
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 clamp(20px, 4vw, 40px);
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-logo {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--ink);
      letter-spacing: -0.01em;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: clamp(12px, 3vw, 32px);
      list-style: none;
    }
    .nav-links a {
      font-size: 1rem;
      font-weight: 500;
      color: var(--ink-muted);
      transition: color 0.15s;
      padding: 4px 0;
    }
    .nav-links a:hover { color: var(--blue-600); }
    .btn-nav {
      display: inline-block;
      background: var(--blue-600);
      color: var(--white) !important;
      padding: 9px 28px;
      border-radius: 20px;
      white-space: nowrap;
      box-sizing: border-box;
      font-weight: 500 !important;
      font-size: 1rem !important;
      transition: background 0.15s, box-shadow 0.15s !important;
      box-shadow: var(--shadow-1);
    }
    .nav-links a.btn-nav { padding: 9px 28px; }
    .btn-nav:hover { background: var(--blue-700) !important; box-shadow: var(--shadow-2) !important; }
    @media (max-width: 640px) {
      .nav-links li:not(:last-child) { display: none; }
    }

    /* ─── HERO ───────────────────────────────────────────────── */
    .hero {
      padding-top: 64px;
      min-height: 100svh;
      display: grid;
      grid-template-columns: 1fr;
      background: var(--white);
    }
    @media (min-width: 768px) {
      .hero { grid-template-columns: 1fr 1fr; }
    }
    .hero-content {
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: clamp(40px, 7vw, 88px) clamp(16px, 5vw, 56px);
      background: var(--white);
    }
    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--blue-600);
      background: var(--blue-50);
      border: 1px solid var(--blue-100);
      padding: 6px 14px;
      border-radius: 20px;
      margin-bottom: 24px;
      width: fit-content;
    }
    .hero h1 { color: var(--ink); margin-bottom: 20px; }
    .hero h1 .accent { color: var(--blue-600); }
    .hero-sub {
      font-size: clamp(1.1rem, 2vw, 1.25rem);
      color: var(--ink-soft);
      max-width: 500px;
      margin-bottom: 36px;
      line-height: 1.75;
    }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }

    .btn-primary {
      display: inline-flex; align-items: center; gap: 8px;
      background: var(--blue-600);
      color: var(--white);
      padding: 13px 24px;
      border-radius: 24px;
      font-weight: 500;
      font-size: 0.95rem;
      box-shadow: var(--shadow-2);
      transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
    }
    .btn-primary:hover { background: var(--blue-700); box-shadow: var(--shadow-3); transform: translateY(-1px); }

    .btn-outlined {
      display: inline-flex; align-items: center; gap: 8px;
      background: transparent;
      color: var(--blue-600);
      padding: 12px 22px;
      border-radius: 24px;
      font-weight: 500;
      font-size: 0.95rem;
      border: 1.5px solid var(--blue-400);
      transition: background 0.15s, border-color 0.15s;
    }
    .btn-outlined:hover { background: var(--blue-50); border-color: var(--blue-600); }

    .hero-stats {
      display: flex;
      gap: clamp(24px, 5vw, 48px);
      padding-top: 32px;
      border-top: 1px solid var(--grey-200);
    }
    .stat-num {
      display: block;
      font-size: 2rem;
      font-weight: 700;
      color: var(--ink);
      letter-spacing: -0.02em;
      line-height: 1;
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.78rem;
      font-weight: 500;
      color: var(--ink-muted);
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }

    .hero-image-col {
      min-height: 480px;
      background: var(--grey-100);
      display: flex; align-items: center; justify-content: center;
      color: var(--grey-600);
      font-size: 0.9rem;
      text-align: center;
    }

    /* ─── MEDIA STRIP ────────────────────────────────────────── */
    .media-strip {
      background: var(--grey-900);
      padding: 36px clamp(16px, 4vw, 40px);
    }
    .media-strip-inner { max-width: var(--max-w); margin: 0 auto; }
    .strip-label {
      font-size: 0.75rem;
      font-weight: 500;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--grey-400);
      text-align: center;
      margin-bottom: 24px;
    }
    .logos-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: clamp(24px, 5vw, 56px);
    }
    .logo-item {
      display: flex;
      align-items: center;
      opacity: 0.6;
      transition: opacity 0.15s;
    }
    .logo-item:hover { opacity: 0.9; }
    .logo-item svg { fill: white; }
    .logo-item img {
      height: 50px;
      width: auto;
      max-width: 200px;
      object-fit: contain;
    }
    .logo-wordmark {
      font-weight: 700;
      color: rgba(255,255,255,0.55);
      letter-spacing: 0.02em;
      white-space: nowrap;
      font-size: clamp(0.9rem, 1.8vw, 1.15rem);
    }
    .strip-divider {
      border: none;
      border-top: 1px solid rgba(255,255,255,0.08);
      margin: 28px 0 24px;
    }
    .stages-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: clamp(10px, 2.5vw, 24px);
    }
    .stage-chip {
      font-size: 0.82rem;
      color: rgba(255,255,255,0.3);
      font-weight: 400;
      white-space: nowrap;
    }

    /* ─── SECTION HEADER ─────────────────────────────────────── */
    .section-eyebrow {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 500;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--blue-600);
      margin-bottom: 12px;
    }
    .section-header { margin-bottom: 48px; }
    .section-header h2 { margin-bottom: 12px; color: var(--ink); }
    .section-header p {
      font-size: 1.15rem;
      color: var(--ink-muted);
      max-width: 560px;
    }
    .section-header.center p { margin: 0 auto; }

    /* ─── PROBLEM ────────────────────────────────────────────── */
    .problem { background: var(--grey-50); }
    .problem-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 48px;
      align-items: start;
      max-width: var(--max-w);
      margin: 0 auto;
    }
    @media (min-width: 768px) { .problem-grid { grid-template-columns: 1fr 1fr; gap: 64px; } }

    .problem-list {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .problem-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 1.05rem;
      color: var(--ink-soft);
      line-height: 1.65;
    }
    .problem-list li .dash {
      color: var(--blue-600);
      font-weight: 700;
      flex-shrink: 0;
      margin-top: 1px;
    }

    .card {
      background: var(--white);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-2);
      padding: 32px;
    }
    .card-blue {
      background: var(--blue-600);
      color: var(--white);
      border-radius: var(--radius-lg);
      padding: 32px;
    }
    .card-blue blockquote {
      font-size: clamp(1.1rem, 2.2vw, 1.35rem);
      font-weight: 400;
      line-height: 1.65;
      color: rgba(255,255,255,0.92);
      font-style: italic;
      margin-bottom: 20px;
    }
    .card-blue cite {
      font-size: 0.85rem;
      color: rgba(255,255,255,0.6);
      font-style: normal;
      font-weight: 500;
    }

    /* ─── VIDEO ──────────────────────────────────────────────── */
    .video-section { background: var(--white); }
    .video-wrap {
      max-width: 800px;
      margin: 0 auto;
      aspect-ratio: 16/9;
      background: var(--grey-900);
      border-radius: var(--radius-xl);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-3);
      position: relative;
      cursor: pointer;
    }
    .play-circle {
      width: 72px; height: 72px;
      border-radius: 50%;
      background: var(--blue-600);
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 4px 16px rgba(26,115,232,0.4);
      transition: transform 0.15s, background 0.15s;
      position: relative; z-index: 1;
    }
    .play-circle:hover { transform: scale(1.08); background: var(--blue-700); }
    .video-caption {
      position: absolute;
      bottom: 0; left: 0; right: 0;
      padding: 16px 24px;
      background: linear-gradient(transparent, rgba(0,0,0,0.65));
      color: rgba(255,255,255,0.65);
      font-size: 0.82rem;
      text-align: center;
    }

    /* ─── KEYNOTE ────────────────────────────────────────────── */
    .keynote-section { background: var(--grey-50); }
    .keynote-card {
      max-width: 820px;
      margin: 0 auto;
      background: var(--white);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-2);
      overflow: hidden;
      border: 1px solid var(--grey-200);
    }
    .keynote-header {
      background: var(--blue-600);
      padding: clamp(28px, 5vw, 48px);
    }
    .talk-label {
      font-size: 0.72rem;
      font-weight: 500;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.65);
      margin-bottom: 14px;
    }
    .talk-title {
      font-size: clamp(1.3rem, 3vw, 1.85rem);
      font-weight: 700;
      color: var(--white);
      line-height: 1.3;
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }
    .talk-meta {
      font-size: 1rem;
      color: rgba(255,255,255,0.6);
    }
    .keynote-card-secondary { border: 2px solid var(--blue-100); }
    .keynote-header-secondary {
      background: var(--blue-50);
      padding: clamp(28px, 5vw, 48px);
      border-bottom: 1px solid var(--blue-100);
    }
    .keynote-body { padding: clamp(24px, 4vw, 44px); }
    .keynote-body p {
      font-size: 1.05rem;
      line-height: 1.75;
      margin-bottom: 16px;
    }
    .outcomes-label {
      font-size: 0.85rem;
      font-weight: 500;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--blue-600);
      margin: 28px 0 16px;
    }
    .outcomes-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 10px;
    }
    @media (min-width: 560px) { .outcomes-grid { grid-template-columns: 1fr 1fr; } }
    .outcome-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 1rem;
      color: var(--ink-soft);
      line-height: 1.55;
    }
    .outcome-icon {
      width: 20px; height: 20px;
      border-radius: 50%;
      background: var(--blue-50);
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
      margin-top: 1px;
    }
    .outcome-icon svg { width: 11px; height: 11px; }

    /* ─── TESTIMONIALS ───────────────────────────────────────── */
    .testimonials-section { background: var(--grey-50); }
    .t-carousel {
      position: relative;
      max-width: var(--max-w);
      margin: 0 auto;
      overflow: hidden;
    }
    .t-track {
      display: flex;
      transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .t-card {
      background: var(--white);
      border: 1px solid var(--grey-200);
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      box-shadow: var(--shadow-1);
      flex: 0 0 100%;
      box-sizing: border-box;
    }
    .t-card blockquote {
      font-size: 1.1rem;
      color: var(--ink-soft);
      line-height: 1.75;
      font-style: italic;
      margin-bottom: 24px;
      text-align: left;
    }
    .t-meta { display: flex; align-items: center; gap: 12px; justify-content: center; }
    .t-avatar {
      width: 40px; height: 40px;
      border-radius: 50%;
      background: var(--blue-50);
      border: 1.5px solid var(--blue-100);
      display: flex; align-items: center; justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      color: var(--blue-600);
      flex-shrink: 0;
    }
    .t-name { font-weight: 600; font-size: 1rem; color: var(--ink); display: block; text-align: center; }
    .t-role { font-size: 0.875rem; color: var(--ink-muted); display: block; text-align: center; }
    .t-institution { font-size: 0.875rem; color: var(--ink-muted); display: block; text-align: center; font-style: italic; }
    .t-controls {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      margin-top: 24px;
    }
    .t-dots {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .t-playpause {
      width: 28px; height: 28px;
      border-radius: 50%;
      border: 1.5px solid var(--grey-200);
      background: var(--white);
      color: var(--ink-muted);
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      transition: border-color 0.2s, color 0.2s;
      padding: 0;
    }
    .t-playpause:hover { border-color: var(--blue-600); color: var(--blue-600); }
    .t-dot {
      width: 8px; height: 8px;
      border-radius: 50%;
      background: var(--grey-200);
      border: none;
      padding: 0;
      cursor: pointer;
      transition: background 0.3s, transform 0.3s;
    }
    .t-dot.active {
      background: var(--blue-600);
      transform: scale(1.3);
    }
    .t-progress {
      position: absolute;
      bottom: 0; left: 0;
      height: 3px;
      background: var(--blue-600);
      opacity: 0.4;
      border-radius: 0 2px 2px 0;
      animation: t-progress-bar 7s linear infinite;
    }
    @keyframes t-progress-bar {
      from { width: 0%; }
      to   { width: 100%; }
    }

    /* ─── SOCIAL PROOF ───────────────────────────────────────── */
    .social-proof-section { background: var(--grey-50); }
    .social-proof-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 48px;
      align-items: center;
      max-width: var(--max-w);
      margin: 0 auto;
    }
    @media (min-width: 768px) {
      .social-proof-grid { grid-template-columns: 1fr 1fr; gap: 64px; }
    }
    .proof-photo-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-3);
    }
    .proof-photo {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .proof-institutions { }
    .institution-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px 24px;
      margin-top: 4px;
    }
    .institution-list li {
      font-size: 0.95rem;
      color: var(--ink-soft);
      padding: 6px 0;
      border-bottom: 1px solid var(--grey-200);
      line-height: 1.4;
    }

    /* ─── BIO ────────────────────────────────────────────────── */
    .bio-section { background: var(--white); }
    .bio-grid {
      display: flex;
      flex-direction: column;
      align-items: center;
      max-width: var(--max-w);
      margin: 0 auto;
      gap: 40px;
    }
    .bio-photo {
      width: 100%;
      max-width: 480px;
      aspect-ratio: 1/1;
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-2);
      overflow: hidden;
      flex-shrink: 0;
    }
    @media (min-width: 768px) {
      .bio-photo { max-width: 520px; }
    }
    .bio-photo-caption {
      font-size: 0.92rem;
      color: var(--ink-muted);
      text-align: center;
      margin-top: -28px;
      font-style: italic;
    }
    .bio-text {
      width: 100%;
      max-width: 760px;
    }
    .bio-text h2 { margin-bottom: 20px; color: var(--ink); }
    .bio-text p { font-size: 1.05rem; line-height: 1.75; margin-bottom: 16px; }
    .bio-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 28px;
    }
    .chip {
      background: var(--blue-50);
      border: 1px solid var(--blue-100);
      color: var(--blue-700);
      font-size: 0.8rem;
      font-weight: 500;
      padding: 5px 14px;
      border-radius: 20px;
    }
    .bio-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 32px;
      padding-top: 28px;
      border-top: 1px solid var(--grey-200);
    }
    .bs-num {
      display: block;
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--blue-600);
      letter-spacing: -0.02em;
      line-height: 1;
      margin-bottom: 4px;
    }
    .bs-label {
      font-size: 0.75rem;
      font-weight: 500;
      color: var(--ink-muted);
      text-transform: uppercase;
      letter-spacing: 0.07em;
    }

    /* ─── BOOKING ────────────────────────────────────────────── */
    .booking-section { background: var(--grey-50); }
    .booking-inner {
      max-width: 640px;
      margin: 0 auto;
    }
    .booking-form {
      background: var(--white);
      border: 1px solid var(--grey-200);
      border-radius: var(--radius-xl);
      padding: clamp(24px, 4vw, 44px);
      box-shadow: var(--shadow-2);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }
    @media (min-width: 480px) { .form-row { grid-template-columns: 1fr 1fr; } }
    .form-group { display: flex; flex-direction: column; gap: 6px; }
    .form-group label {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--ink-muted);
      letter-spacing: 0.03em;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      background: var(--white);
      border: 1.5px solid var(--grey-200);
      border-radius: var(--radius);
      padding: 12px 16px;
      font-size: 1rem;
      font-family: inherit;
      color: var(--ink);
      outline: none;
      transition: border-color 0.15s, box-shadow 0.15s;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--blue-600);
      box-shadow: 0 0 0 3px rgba(26,115,232,0.12);
    }
    .form-group input::placeholder,
    .form-group textarea::placeholder { color: var(--grey-400); }
    .form-group textarea { resize: vertical; min-height: 96px; }
    .form-submit {
      width: 100%;
      background: var(--blue-600);
      color: var(--white);
      border: none;
      border-radius: 24px;
      padding: 15px;
      font-size: 1rem;
      font-weight: 500;
      font-family: inherit;
      cursor: pointer;
      margin-top: 8px;
      box-shadow: var(--shadow-2);
      transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
    }
    .form-submit:hover { background: var(--blue-700); box-shadow: var(--shadow-3); transform: translateY(-1px); }
    .form-note {
      text-align: center;
      font-size: 0.78rem;
      color: var(--ink-muted);
      margin-top: 14px;
    }
    .divider-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin: 20px 0;
      color: var(--grey-400);
      font-size: 0.82rem;
    }
    .divider-row::before, .divider-row::after {
      content: '';
      flex: 1;
      height: 1px;
      background: var(--grey-200);
    }
    .btn-outlined-dark {
      display: block;
      text-align: center;
      width: 100%;
      border: 1.5px solid var(--grey-200);
      border-radius: 24px;
      padding: 13px;
      color: var(--blue-600);
      font-weight: 500;
      font-size: 0.95rem;
      font-family: inherit;
      transition: border-color 0.15s, background 0.15s;
    }
    .btn-outlined-dark:hover { border-color: var(--blue-400); background: var(--blue-50); }

    /* ─── FORM SUCCESS ──────────────────────────────────────── */
    .form-success {
      display: none;
      background: #e6f4ea;
      border: 1px solid #a8d5b5;
      border-radius: var(--radius);
      padding: 16px 20px;
      margin-bottom: 20px;
      color: #1e6e3a;
      font-weight: 500;
      text-align: center;
    }

    /* ─── FOOTER ─────────────────────────────────────────────── */
    footer {
      background: var(--grey-900);
      padding: 36px clamp(16px, 4vw, 40px);
    }
    .footer-inner {
      max-width: var(--max-w);
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
    }
    .footer-name {
      font-size: 1rem;
      font-weight: 700;
      color: rgba(255,255,255,0.7);
    }
    .footer-links {
      display: flex;
      gap: 24px;
    }
    .footer-links a {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.35);
      transition: color 0.15s;
    }
    .footer-links a:hover { color: var(--blue-400); }
    .footer-copy {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.2);
    }