:root {
      --bg: #010b1f;
      --card: rgba(255,255,255,0.06);
      --card-border: rgba(255,255,255,0.08);
      --text: #f8fbff;
      --muted: rgba(255,255,255,0.7);
      --primary: #3b82f6;
      --accent: #22d3ee;
      --warning: #fbbf24;
    }
    * { box-sizing: border-box; }
    body {
      margin: 0;
      font-family: 'SF Pro Display', 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Inter', sans-serif;
      background: radial-gradient(circle at top, rgba(59,130,246,0.35), transparent 45%),
                  radial-gradient(circle at 80% 0%, rgba(34,211,238,0.25), transparent 55%),
                  var(--bg);
      color: var(--text);
      line-height: 1.6;
      min-height: 100vh;
    }
    header {
      padding: 28px 7vw 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .logo {
      font-size: 1.1rem;
      letter-spacing: 0.2em;
    }
    nav {
      display: flex;
      gap: 20px;
      font-size: 0.95rem;
    }
    nav a {
      color: var(--muted);
      text-decoration: none;
    }
    nav a:hover { color: white; }
    .pill {
      border: 1px solid var(--card-border);
      border-radius: 999px;
      padding: 10px 20px;
      font-size: 0.9rem;
      color: var(--muted);
    }
    main { padding: 40px 7vw 100px; }
    .hero {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 40px;
      padding: 40px 0 10px;
      align-items: center;
    }
    h1 {
      font-size: clamp(2.6rem, 5vw, 4.2rem);
      margin: 0 0 18px;
    }
    .hero p { color: var(--muted); font-size: 1.1rem; }
    .highlight {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(59,130,246,0.15);
      border-radius: 999px;
      padding: 10px 18px;
      font-size: 0.95rem;
      color: #9cc7ff;
    }
    .hero-card,
    .hero-visual {
      border: 1px solid var(--card-border);
      border-radius: 24px;
      padding: 24px;
      backdrop-filter: blur(16px);
      background: linear-gradient(150deg, rgba(59,130,246,0.25), rgba(34,211,238,0.1));
      box-shadow: 0 30px 80px rgba(0,0,0,0.4);
    }
    .hero-visual {
      position: relative;
      overflow: hidden;
      padding: 0;
    }
    .hero-visual img {
      width: 100%;
      display: block;
      height: 100%;
      object-fit: cover;
    }
    .hero-visual .tagline {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(0,3,12,0.75);
      padding: 16px;
      border-radius: 16px;
      color: var(--text);
      font-size: 0.95rem;
    }
    .metrics {
      margin-top: 30px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
      gap: 18px;
    }
    .metric {
      border: 1px solid var(--card-border);
      border-radius: 20px;
      padding: 18px 20px;
      background: var(--card);
      text-align: center;
    }
    .metric span { font-size: 2rem; font-weight: 700; display:block; }
    section { margin-top: 80px; }
    h2 { font-size: 2rem; margin-bottom: 10px; }
    .subtitle { color: var(--muted); max-width: 760px; }
    .brand-banner {
      margin-top: 60px;
      border: 1px solid var(--card-border);
      border-radius: 26px;
      padding: 24px;
      background: rgba(2,11,31,0.85);
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      justify-content: space-around;
      align-items: center;
      text-transform: uppercase;
      color: rgba(255,255,255,0.65);
      font-size: 0.9rem;
      letter-spacing: 0.2em;
    }
    .role-switcher {
      margin-top: 30px;
      border: 1px solid var(--card-border);
      border-radius: 30px;
      padding: 8px;
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      background: rgba(255,255,255,0.04);
    }
    .role-switcher button {
      flex: 1;
      min-width: 120px;
      padding: 12px;
      border-radius: 24px;
      border: none;
      background: transparent;
      color: var(--muted);
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .role-switcher button.active {
      background: linear-gradient(120deg, var(--primary), var(--accent));
      color: #021330;
      box-shadow: 0 12px 30px rgba(59,130,246,0.35);
    }
    .dashboard {
      margin-top: 24px;
      border: 1px solid var(--card-border);
      border-radius: 28px;
      padding: 24px;
      background: rgba(3,13,35,0.85);
      display: grid;
      gap: 20px;
    }
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
      gap: 16px;
    }
    .tile {
      border: 1px solid var(--card-border);
      border-radius: 22px;
      padding: 18px;
      background: var(--card);
      min-height: 140px;
    }
    .tile small { color: var(--muted); text-transform: uppercase; letter-spacing: 0.12em; }
    .courses,
    .gallery {
      margin-top: 40px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 18px;
    }
    .course,
    .gallery img {
      border: 1px solid var(--card-border);
      border-radius: 22px;
      background: rgba(255,255,255,0.03);
      position: relative;
      overflow: hidden;
    }
    .course { padding: 18px; }
    .gallery img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }
    .timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
      gap: 20px;
      margin-top: 24px;
    }
    .timeline-step {
      border-left: 2px solid var(--primary);
      padding-left: 18px;
    }
    .cta {
      margin-top: 90px;
      border: 1px solid var(--card-border);
      border-radius: 30px;
      padding: 32px;
      background: linear-gradient(135deg, rgba(34,211,238,0.2), rgba(59,130,246,0.25));
      text-align: center;
    }
    .btn-primary {
      margin-top: 18px;
      border: none;
      border-radius: 999px;
      padding: 16px 34px;
      font-size: 1rem;
      font-weight: 600;
      background: #fff;
      color: #0a1f3c;
      cursor: pointer;
      box-shadow: 0 20px 45px rgba(10,31,60,0.35);
    }
    .media-slider {
      margin-top: 40px;
      border: 1px solid var(--card-border);
      border-radius: 28px;
      padding: 24px;
      background: rgba(255,255,255,0.03);
      position: relative;
      overflow: hidden;
    }
    .slides {
      display: flex;
      gap: 24px;
      transition: transform 0.5s ease;
    }
    .slide {
      min-width: 280px;
      border: 1px solid var(--card-border);
      border-radius: 22px;
      overflow: hidden;
      background: rgba(0,0,0,0.35);
    }
    .slide img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
    }
    .slide-content { padding: 18px; }
    .slider-controls {
      display: flex;
      justify-content: flex-end;
      gap: 12px;
      margin-top: 18px;
    }
    .slider-controls button {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: rgba(255,255,255,0.1);
      border: 1px solid var(--card-border);
      color: #fff;
      font-size: 1rem;
      cursor: pointer;
    }
    .content-grid {
      margin-top: 40px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
      gap: 18px;
    }
    .content-block {
      border: 1px solid var(--card-border);
      border-radius: 24px;
      padding: 20px;
      background: rgba(2,11,31,0.9);
    }
    .quiz-panel {
      margin-top: 32px;
      border: 1px solid var(--card-border);
      border-radius: 26px;
      padding: 24px;
      background: rgba(3,13,35,0.9);
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
      gap: 20px;
    }
    .quiz-panel h3 { margin-top: 0; }
    .quiz-panel ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
    .quiz-progress {
      border-radius: 18px;
      padding: 18px;
      background: rgba(59,130,246,0.15);
      border: 1px solid rgba(59,130,246,0.35);
    }
    .quiz-progress strong { font-size: 2rem; display: block; }
    footer {
      padding: 40px 7vw 80px;
      color: var(--muted);
      font-size: 0.9rem;
    }
    @media (max-width: 640px) {
      header { flex-direction: column; gap: 12px; }
      nav { flex-wrap: wrap; justify-content: center; }
      .role-switcher { flex-direction: column; }
      .slides { gap: 12px; }
      .slide { min-width: 240px; }
    }
nav a.active {
  color: #ffffff;
  font-weight: 600;
}