/* ══════════════════════════════════════════
       DESIGN TOKENS
    ══════════════════════════════════════════ */
    :root {
      --bg:         #080b0e;
      --bg2:        #0e1318;
      --bg3:        #141b22;
      --border:     #1e2a35;
      --border2:    #243040;

      --amber:      #f5a623;
      --amber-dim:  #c47d0e;
      --amber-glow: rgba(245,166,35,0.15);
      --green:      #00e5a0;
      --green-dim:  rgba(0,229,160,0.12);
      --red:        #ff4c4c;

      --text:       #dde4ed;
      --text2:      #8b9aad;
      --text3:      #4a5a6a;

      --ff-display: 'Rajdhani', sans-serif;
      --ff-mono:    'JetBrains Mono', monospace;
      --ff-body:    'Barlow', sans-serif;

      --radius:     6px;
      --max-w:      1140px;
      --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    }

    /* ══════════════════════════════════════════
       RESET & BASE
    ══════════════════════════════════════════ */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; font-size: 16px; }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: var(--ff-body);
      font-weight: 400;
      line-height: 1.6;
      overflow-x: hidden;
    }

    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }

    /* ══════════════════════════════════════════
       CIRCUIT GRID BACKGROUND
    ══════════════════════════════════════════ */
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image:
        linear-gradient(rgba(245,166,35,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245,166,35,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: 0;
    }

    /* ══════════════════════════════════════════
       LAYOUT HELPERS
    ══════════════════════════════════════════ */
    .container {
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 24px;
    }

    section { position: relative; z-index: 1; }

    /* ══════════════════════════════════════════
       TYPOGRAPHY HELPERS
    ══════════════════════════════════════════ */
    .label {
      font-family: var(--ff-mono);
      font-size: 0.72rem;
      font-weight: 500;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--amber);
    }

    .section-title {
      font-family: var(--ff-display);
      font-size: clamp(2rem, 5vw, 3rem);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: 0.02em;
    }

    /* ══════════════════════════════════════════
       NAVBAR
    ══════════════════════════════════════════ */
    #navbar {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      border-bottom: 1px solid transparent;
      transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
    }

    #navbar.scrolled {
      background: rgba(8,11,14,0.88);
      backdrop-filter: blur(12px);
      border-color: var(--border);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .nav-logo-icon {
      width: 32px; height: 32px;
      background: var(--amber);
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }

    .nav-logo-text {
      font-family: var(--ff-display);
      font-size: 1.35rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: var(--text);
    }

    .nav-logo-text span { color: var(--amber); }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      font-family: var(--ff-mono);
      font-size: 0.78rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text2);
      transition: color var(--transition);
    }

    .nav-links a:hover { color: var(--amber); }

    .nav-cta {
      background: var(--amber) !important;
      color: var(--bg) !important;
      padding: 8px 20px;
      border-radius: var(--radius);
      font-weight: 700 !important;
      transition: opacity var(--transition) !important;
    }
    .nav-cta:hover { opacity: 0.85; }

    /* Hamburger */
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      padding: 6px;
      background: none;
      border: none;
    }
    .hamburger span {
      display: block;
      width: 24px; height: 2px;
      background: var(--text);
      transition: var(--transition);
    }
    .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger.open span:nth-child(2) { opacity: 0; }
    .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .mobile-menu {
      display: none;
      flex-direction: column;
      background: var(--bg2);
      border-top: 1px solid var(--border);
      padding: 20px 24px;
      gap: 16px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a {
      font-family: var(--ff-mono);
      font-size: 0.85rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text2);
      transition: color var(--transition);
    }
    .mobile-menu a:hover { color: var(--amber); }
    .mobile-menu .nav-cta {
      background: var(--amber) !important;
      color: var(--bg) !important;
      padding: 10px 20px;
      border-radius: var(--radius);
      text-align: center;
    }

    /* ══════════════════════════════════════════
       HERO
    ══════════════════════════════════════════ */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding: 100px 0 60px;
      overflow: hidden;
    }

    .hero-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid var(--amber-dim);
      background: var(--amber-glow);
      padding: 6px 14px;
      border-radius: 100px;
      margin-bottom: 24px;
    }

    .badge-dot {
      width: 6px; height: 6px;
      border-radius: 50%;
      background: var(--amber);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.8); }
    }

    .hero-title {
      font-family: var(--ff-display);
      font-size: clamp(2.6rem, 6vw, 4.2rem);
      font-weight: 700;
      line-height: 1.05;
      letter-spacing: 0.02em;
      margin-bottom: 20px;
    }

    .hero-title .highlight {
      color: var(--amber);
      position: relative;
    }

    .hero-title .highlight::after {
      content: '';
      position: absolute;
      bottom: 2px; left: 0; right: 0;
      height: 3px;
      background: var(--amber);
      opacity: 0.3;
      border-radius: 2px;
    }

    .hero-sub {
      font-size: 1.05rem;
      color: var(--text2);
      line-height: 1.75;
      margin-bottom: 36px;
      max-width: 520px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      align-items: center;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--amber);
      color: var(--bg);
      font-family: var(--ff-display);
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      padding: 14px 28px;
      border-radius: var(--radius);
      border: none;
      cursor: pointer;
      transition: transform var(--transition), box-shadow var(--transition);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(245,166,35,0.3);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text);
      font-family: var(--ff-display);
      font-size: 1rem;
      font-weight: 600;
      letter-spacing: 0.06em;
      padding: 13px 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border2);
      cursor: pointer;
      transition: border-color var(--transition), background var(--transition);
    }
    .btn-ghost:hover {
      border-color: var(--amber-dim);
      background: var(--amber-glow);
    }

    /* Hero stats */
    .hero-stats {
      display: flex;
      gap: 32px;
      margin-top: 40px;
      padding-top: 32px;
      border-top: 1px solid var(--border);
    }

    .stat-item { display: flex; flex-direction: column; gap: 2px; }
    .stat-num {
      font-family: var(--ff-display);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--amber);
      line-height: 1;
    }
    .stat-label {
      font-size: 0.8rem;
      color: var(--text3);
      font-family: var(--ff-mono);
      letter-spacing: 0.08em;
    }

    /* Hero visual */
    .hero-visual {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .circuit-board {
      width: 100%;
      max-width: 460px;
      aspect-ratio: 1;
      position: relative;
    }

    .circuit-board svg {
      width: 100%;
      height: 100%;
      opacity: 0.85;
    }

    /* Floating chips */
    .chip-card {
      position: absolute;
      background: var(--bg3);
      border: 1px solid var(--border2);
      border-radius: var(--radius);
      padding: 10px 14px;
      font-family: var(--ff-mono);
      font-size: 0.72rem;
      color: var(--amber);
      white-space: nowrap;
      animation: float 4s ease-in-out infinite;
    }
    .chip-card:nth-child(2) { top: 5%; right: -8%; animation-delay: 0s; }
    .chip-card:nth-child(3) { bottom: 18%; left: -10%; animation-delay: 1.5s; }
    .chip-card:nth-child(4) { top: 48%; right: -12%; animation-delay: 0.8s; }

    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }

    /* ══════════════════════════════════════════
       MARQUEE STRIP
    ══════════════════════════════════════════ */
    .marquee-strip {
      background: var(--amber);
      padding: 12px 0;
      overflow: hidden;
      position: relative;
      z-index: 1;
    }

    .marquee-track {
      display: flex;
      gap: 48px;
      animation: marquee 22s linear infinite;
      width: max-content;
    }

    .marquee-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-family: var(--ff-display);
      font-size: 0.9rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--bg);
      white-space: nowrap;
    }

    .marquee-dot {
      width: 5px; height: 5px;
      border-radius: 50%;
      background: var(--bg);
      opacity: 0.4;
    }

    @keyframes marquee {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }

    /* ══════════════════════════════════════════
       COURSES SECTION
    ══════════════════════════════════════════ */
    #courses {
      padding: 100px 0;
    }

    .section-head {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-head .label { margin-bottom: 12px; display: block; }

    .section-head p {
      font-size: 1.05rem;
      color: var(--text2);
      max-width: 540px;
      margin: 16px auto 0;
    }

    .courses-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .course-card {
      background: var(--bg2);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 32px;
      position: relative;
      overflow: hidden;
      transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
      cursor: default;
    }

    .course-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: var(--amber);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform var(--transition);
    }

    .course-card:hover {
      transform: translateY(-6px);
      border-color: var(--border2);
      box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    }

    .course-card:hover::before { transform: scaleX(1); }

    .course-card.featured {
      border-color: var(--amber-dim);
      background: linear-gradient(135deg, var(--bg2) 60%, rgba(245,166,35,0.05));
    }

    .course-card.featured::before { transform: scaleX(1); }

    .featured-badge {
      position: absolute;
      top: 16px; right: 16px;
      background: var(--amber);
      color: var(--bg);
      font-family: var(--ff-mono);
      font-size: 0.65rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 3px 10px;
      border-radius: 100px;
    }

    .course-icon {
      width: 52px; height: 52px;
      background: var(--bg3);
      border: 1px solid var(--border2);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      font-size: 1.5rem;
    }

    .course-num {
      font-family: var(--ff-mono);
      font-size: 0.7rem;
      color: var(--text3);
      letter-spacing: 0.12em;
      margin-bottom: 8px;
    }

    .course-title {
      font-family: var(--ff-display);
      font-size: 1.4rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 12px;
      letter-spacing: 0.02em;
    }

    .course-desc {
      font-size: 0.9rem;
      color: var(--text2);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .course-topics {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 28px;
    }

    .course-topics li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.85rem;
      color: var(--text2);
    }

    .course-topics li::before {
      content: '▸';
      color: var(--amber);
      flex-shrink: 0;
      margin-top: 1px;
      font-size: 0.75rem;
    }

    .course-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }

    .course-level {
      font-family: var(--ff-mono);
      font-size: 0.7rem;
      color: var(--text3);
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }

    .course-link {
      font-family: var(--ff-mono);
      font-size: 0.78rem;
      color: var(--amber);
      letter-spacing: 0.08em;
      transition: gap var(--transition);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .course-link:hover { gap: 8px; }

    /* ══════════════════════════════════════════
       WHY SECTION
    ══════════════════════════════════════════ */
    #why {
      padding: 100px 0;
      background: var(--bg2);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .why-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: center;
    }

    .why-content .label { margin-bottom: 12px; display: block; }
    .why-content .section-title { margin-bottom: 16px; }
    .why-content > p {
      color: var(--text2);
      font-size: 1rem;
      line-height: 1.75;
      margin-bottom: 36px;
    }

    .why-features {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .why-feature {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .why-feature-icon {
      width: 40px; height: 40px;
      border-radius: 8px;
      background: var(--amber-glow);
      border: 1px solid var(--amber-dim);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .why-feature-text h4 {
      font-family: var(--ff-display);
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 4px;
      letter-spacing: 0.03em;
    }

    .why-feature-text p {
      font-size: 0.88rem;
      color: var(--text2);
      line-height: 1.6;
    }

    /* Terminal widget */
    .terminal {
      background: #050809;
      border: 1px solid var(--border2);
      border-radius: 10px;
      overflow: hidden;
      font-family: var(--ff-mono);
    }

    .terminal-bar {
      background: var(--bg3);
      padding: 10px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      border-bottom: 1px solid var(--border);
    }

    .t-dot {
      width: 11px; height: 11px;
      border-radius: 50%;
    }
    .t-dot:nth-child(1) { background: #ff5f57; }
    .t-dot:nth-child(2) { background: #ffbd2e; }
    .t-dot:nth-child(3) { background: #28c840; }

    .terminal-title {
      font-size: 0.72rem;
      color: var(--text3);
      letter-spacing: 0.08em;
      margin-left: 8px;
    }

    .terminal-body {
      padding: 20px 20px 28px;
      font-size: 0.82rem;
      line-height: 2;
    }

    .t-line { display: block; }
    .t-prompt { color: var(--amber); }
    .t-cmd { color: var(--text); }
    .t-comment { color: var(--text3); }
    .t-out { color: var(--green); }
    .t-warn { color: #ff5e3a; }

    .cursor {
      display: inline-block;
      width: 8px; height: 14px;
      background: var(--amber);
      vertical-align: middle;
      animation: blink 1.1s step-end infinite;
    }

    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0; }
    }

    /* ══════════════════════════════════════════
       CURRICULUM OVERVIEW
    ══════════════════════════════════════════ */
    #curriculum {
      padding: 100px 0;
    }

    .curriculum-tabs {
      display: flex;
      gap: 4px;
      background: var(--bg2);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 4px;
      margin-bottom: 40px;
      width: fit-content;
    }

    .tab-btn {
      font-family: var(--ff-mono);
      font-size: 0.78rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 9px 20px;
      border-radius: 6px;
      border: none;
      background: transparent;
      color: var(--text2);
      cursor: pointer;
      transition: background var(--transition), color var(--transition);
      white-space: nowrap;
    }

    .tab-btn.active {
      background: var(--amber);
      color: var(--bg);
      font-weight: 700;
    }

    .tab-panel { display: none; }
    .tab-panel.active { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }

    .module-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 2px;
    }

    .module-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 16px;
      border-radius: var(--radius);
      border: 1px solid transparent;
      transition: background var(--transition), border-color var(--transition);
      cursor: default;
    }

    .module-item:hover {
      background: var(--bg2);
      border-color: var(--border);
    }

    .module-num {
      font-family: var(--ff-mono);
      font-size: 0.7rem;
      color: var(--text3);
      width: 28px;
      flex-shrink: 0;
    }

    .module-name {
      font-size: 0.92rem;
      color: var(--text);
      flex: 1;
    }

    .module-tag {
      font-family: var(--ff-mono);
      font-size: 0.65rem;
      padding: 2px 8px;
      border-radius: 100px;
      background: var(--bg3);
      color: var(--text3);
      border: 1px solid var(--border);
    }

    .module-tag.lab { color: var(--green); border-color: rgba(0,229,160,0.25); background: var(--green-dim); }
    .module-tag.proj { color: var(--amber); border-color: rgba(245,166,35,0.25); background: var(--amber-glow); }

    .tab-aside {
      position: sticky;
      top: 90px;
    }

    .aside-card {
      background: var(--bg2);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 28px;
    }

    .aside-card h4 {
      font-family: var(--ff-display);
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .aside-card p {
      font-size: 0.88rem;
      color: var(--text2);
      margin-bottom: 20px;
      line-height: 1.65;
    }

    .aside-meta {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .meta-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border);
    }
    .meta-row:last-child { border-bottom: none; padding-bottom: 0; }

    .meta-key { color: var(--text3); font-family: var(--ff-mono); font-size: 0.75rem; letter-spacing: 0.08em; }
    .meta-val { color: var(--text); font-weight: 500; }

    /* ══════════════════════════════════════════
       TOOLS SECTION
    ══════════════════════════════════════════ */
    #tools {
      padding: 80px 0;
      background: var(--bg2);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .tools-inner {
      display: flex;
      gap: 60px;
      align-items: center;
    }

    .tools-left { flex-shrink: 0; }
    .tools-left .label { margin-bottom: 12px; display: block; }
    .tools-left h3 {
      font-family: var(--ff-display);
      font-size: 1.8rem;
      font-weight: 700;
      line-height: 1.2;
      max-width: 280px;
    }

    .tools-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      flex: 1;
    }

    .tool-chip {
      background: var(--bg3);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 14px 10px;
      text-align: center;
      font-family: var(--ff-mono);
      font-size: 0.75rem;
      color: var(--text2);
      letter-spacing: 0.06em;
      transition: border-color var(--transition), color var(--transition), background var(--transition);
    }

    .tool-chip:hover {
      border-color: var(--amber-dim);
      color: var(--amber);
      background: var(--amber-glow);
    }

    .tool-chip-icon { font-size: 1.4rem; margin-bottom: 6px; }

    /* ══════════════════════════════════════════
       ENROLL / CTA
    ══════════════════════════════════════════ */
    #enroll {
      padding: 100px 0;
    }

    .enroll-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: start;
    }

    .enroll-content .label { margin-bottom: 12px; display: block; }
    .enroll-content .section-title { margin-bottom: 16px; }
    .enroll-content > p { color: var(--text2); font-size: 1rem; line-height: 1.75; margin-bottom: 32px; }

    .contact-rows {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .contact-row {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.9rem;
    }

    .contact-icon {
      width: 36px; height: 36px;
      border-radius: var(--radius);
      background: var(--amber-glow);
      border: 1px solid var(--amber-dim);
      display: flex; align-items: center; justify-content: center;
      font-size: 1rem;
      flex-shrink: 0;
    }

    .contact-row span { color: var(--text2); }
    .contact-row a { color: var(--text); transition: color var(--transition); }
    .contact-row a:hover { color: var(--amber); }

    /* Enroll form */
    .enroll-form-wrap {
      background: var(--bg2);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 36px;
    }

    .form-title {
      font-family: var(--ff-display);
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .form-sub {
      font-size: 0.88rem;
      color: var(--text2);
      margin-bottom: 28px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 16px;
    }

    .form-group label {
      font-family: var(--ff-mono);
      font-size: 0.72rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text3);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      background: var(--bg3);
      border: 1px solid var(--border2);
      border-radius: var(--radius);
      color: var(--text);
      font-family: var(--ff-body);
      font-size: 0.92rem;
      padding: 11px 14px;
      outline: none;
      transition: border-color var(--transition);
      width: 100%;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--amber-dim);
    }

    .form-group select option { background: var(--bg3); }
    .form-group textarea { resize: vertical; min-height: 90px; }

    .form-submit {
      width: 100%;
      background: var(--amber);
      color: var(--bg);
      font-family: var(--ff-display);
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      padding: 14px;
      border: none;
      border-radius: var(--radius);
      cursor: pointer;
      margin-top: 8px;
      transition: opacity var(--transition), transform var(--transition);
    }
    .form-submit:hover { opacity: 0.88; transform: translateY(-1px); }

    .form-note {
      font-size: 0.78rem;
      color: var(--text3);
      text-align: center;
      margin-top: 12px;
    }

    .whatsapp-fab {
      position: fixed;
      right: 18px;
      bottom: 18px;
      width: 54px;
      height: 54px;
      border-radius: 999px;
      background: #25D366;
      color: #06210f;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 26px;
      z-index: 220;
      box-shadow: 0 12px 34px rgba(0,0,0,0.45);
      border: 1px solid rgba(255,255,255,0.14);
      transition: transform var(--transition), opacity var(--transition), box-shadow var(--transition);
    }
    .whatsapp-fab:hover {
      transform: translateY(-2px);
      opacity: 0.92;
      box-shadow: 0 16px 46px rgba(0,0,0,0.5);
    }

    /* ══════════════════════════════════════════
       FOOTER
    ══════════════════════════════════════════ */
    footer {
      border-top: 1px solid var(--border);
      padding: 48px 0 32px;
      position: relative;
      z-index: 1;
    }

    .footer-inner {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 40px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      color: var(--text2);
      margin-top: 12px;
      line-height: 1.7;
      max-width: 280px;
    }

    .footer-col h5 {
      font-family: var(--ff-mono);
      font-size: 0.72rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--text3);
      margin-bottom: 16px;
    }

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

    .footer-col ul li a {
      font-size: 0.88rem;
      color: var(--text2);
      transition: color var(--transition);
    }

    .footer-col ul li a:hover { color: var(--amber); }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 24px;
      border-top: 1px solid var(--border);
      font-size: 0.82rem;
      color: var(--text3);
      font-family: var(--ff-mono);
      letter-spacing: 0.06em;
    }

    /* ══════════════════════════════════════════
       SCROLL REVEAL
    ══════════════════════════════════════════ */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.65s ease, transform 0.65s ease;
    }

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

    /* ══════════════════════════════════════════
       RESPONSIVE — TABLET (≤900px)
    ══════════════════════════════════════════ */
    @media (max-width: 900px) {
      .nav-links, .nav-cta { display: none; }
      .hamburger { display: flex; }

      .hero-inner {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
      }
      .hero-sub { margin: 0 auto 36px; }
      .hero-actions { justify-content: center; }
      .hero-stats { justify-content: center; }
      .hero-visual { display: none; }

      .courses-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }

      .why-inner { grid-template-columns: 1fr; gap: 40px; }

      .tab-panel.active { grid-template-columns: 1fr; }
      .tab-aside { position: static; }

      .tools-inner { flex-direction: column; gap: 32px; }
      .tools-left h3 { max-width: none; }
      .tools-grid { grid-template-columns: repeat(3, 1fr); }

      .enroll-inner { grid-template-columns: 1fr; gap: 40px; }

      .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
      .footer-brand { grid-column: 1 / -1; }
    }

    /* ══════════════════════════════════════════
       RESPONSIVE — MOBILE (≤540px)
    ══════════════════════════════════════════ */
    @media (max-width: 540px) {
      .container { padding: 0 16px; }

      #hero { padding: 90px 0 50px; }

      .hero-stats { flex-wrap: wrap; gap: 20px; }

      .curriculum-tabs {
        overflow-x: auto;
        width: 100%;
        max-width: 100%;
      }

      .tools-grid { grid-template-columns: repeat(2, 1fr); }

      .footer-inner { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    }