:root {
    --bg: #0a0e1a;
    --bg2: #0f1526;
    --card: #141b2e;
    --accent: #00d4ff;
    --accent2: #7c3aed;
    --accent3: #f59e0b;
    --text: #e8eaf0;
    --muted: #8892a4;
    --border: rgba(0,212,255,0.15);
    --grad: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: 'Source Sans 3', sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
  }

  /* ── NAV ── */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 5%;
    background: rgba(10,14,26,0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }
  .logo {
    font-family: 'Source Sans 3', sans-serif;
    font-size: 1.8rem; font-weight: 800;
    background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
  }
  .logo span { font-weight: 400; }
  .nav-links { display: flex; gap: 2rem; list-style: none; }
  .nav-links a {
    color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 500;
    transition: color 0.2s;
  }
  .nav-links a:hover { color: var(--accent); }
  .nav-cta {
    background: var(--grad); color: #fff; border: none; padding: 0.6rem 1.4rem;
    border-radius: 6px; font-family: 'Source Sans 3', sans-serif; font-size: 0.9rem;
    font-weight: 500; cursor: pointer; text-decoration: none;
    transition: opacity 0.2s, transform 0.2s;
  }
  .nav-cta:hover { opacity: 0.85; transform: translateY(-1px); }

  /* ── HERO ── */
  .hero {
    min-height: 100vh;
    display: flex; align-items: center;
    padding: 8rem 5% 4rem;
    position: relative;
    overflow: hidden;
  }
  .hero-bg {
    position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 60% 60% at 80% 40%, rgba(124,58,237,0.18) 0%, transparent 70%),
      radial-gradient(ellipse 50% 50% at 20% 70%, rgba(0,212,255,0.12) 0%, transparent 60%);
  }
  .hero-grid {
    position: absolute; inset: 0; opacity: 0.04;
    background-image: linear-gradient(var(--accent) 1px, transparent 1px),
                      linear-gradient(90deg, var(--accent) 1px, transparent 1px);
    background-size: 60px 60px;
  }
  .hero-content { position: relative; max-width: 700px; }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: rgba(0,212,255,0.1); border: 1px solid var(--border);
    padding: 0.4rem 1rem; border-radius: 100px; font-size: 0.8rem;
    color: var(--accent); font-weight: 500; margin-bottom: 1.8rem;
    animation: fadeUp 0.7s ease both;
  }
  .hero-badge::before { content:''; width:6px; height:6px; border-radius:50%; background:var(--accent); animation: pulse 1.5s infinite; }
  .hero-slogan {
    font-size: 1rem; font-weight: 600; color: var(--muted);
    letter-spacing: 0.04em; margin-bottom: 1.4rem;
    animation: fadeUp 0.7s 0.05s ease both;
  }
  .hero-slogan span {
    background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    font-weight: 700;
  }
  @keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }
  h1 {
    font-family: 'Source Sans 3', sans-serif;
    font-size: clamp(2.6rem, 5vw, 4.2rem);
    font-weight: 800; line-height: 1.1;
    letter-spacing: -2px;
    animation: fadeUp 0.7s 0.1s ease both;
  }
  h1 .accent { background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
  .hero-sub {
    font-size: 1.1rem; color: var(--muted); line-height: 1.7;
    margin: 1.5rem 0 2.5rem;
    animation: fadeUp 0.7s 0.2s ease both;
  }
  .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; animation: fadeUp 0.7s 0.3s ease both; }
  .btn-primary {
    background: var(--grad); color: #fff; padding: 0.85rem 2rem;
    border-radius: 8px; font-size: 1rem; font-weight: 600;
    text-decoration: none; transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 24px rgba(0,212,255,0.25);
  }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,212,255,0.35); }
  .btn-outline {
    background: transparent; color: var(--text); padding: 0.85rem 2rem;
    border: 1px solid var(--border); border-radius: 8px; font-size: 1rem;
    font-weight: 500; text-decoration: none; transition: border-color 0.2s, color 0.2s;
  }
  .btn-outline:hover { border-color: var(--accent); color: var(--accent); }
  .hero-stats {
    display: flex; gap: 3rem; margin-top: 4rem;
    animation: fadeUp 0.7s 0.4s ease both;
  }
  .stat-num {
    font-family: 'Source Sans 3', sans-serif; font-size: 2.2rem; font-weight: 800;
    background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  }
  .stat-label { font-size: 0.8rem; color: var(--muted); margin-top: 0.2rem; letter-spacing: 0.05em; text-transform: uppercase; }

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

  /* ── SECTION COMMON ── */
  section { padding: 6rem 5%; }
  .section-tag {
    display: inline-block; font-size: 0.75rem; letter-spacing: 0.15em;
    text-transform: uppercase; color: var(--accent); font-weight: 600;
    margin-bottom: 0.8rem;
  }
  .section-title {
    font-family: 'Source Sans 3', sans-serif; font-size: clamp(1.8rem, 3vw, 2.8rem);
    font-weight: 800; letter-spacing: -1px; line-height: 1.15; margin-bottom: 1rem;
  }
  .section-sub { color: var(--muted); font-size: 1rem; line-height: 1.7; max-width: 560px; }

  /* ── MARQUEE ── */
  .marquee-wrap {
    background: var(--bg2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
    padding: 1.2rem 0; overflow: hidden;
  }
  .marquee-track {
    display: flex; gap: 3rem; white-space: nowrap;
    animation: scroll 22s linear infinite;
  }
  .marquee-item {
    font-family: 'Source Sans 3', sans-serif; font-size: 0.85rem; font-weight: 600;
    color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase;
    display: flex; align-items: center; gap: 1rem; flex-shrink: 0;
  }
  .marquee-item::after { content:'✦'; color: var(--accent); font-size: 0.6rem; }
  @keyframes scroll { from{transform:translateX(0)} to{transform:translateX(-50%)} }

  /* ── COURSES ── */
  .courses-section { background: var(--bg); }
  .courses-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 3rem; flex-wrap: wrap; gap: 1rem; }
  .courses-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem;
  }
  .course-card {
    background: var(--card); border: 1px solid var(--border); border-radius: 14px;
    padding: 2rem; cursor: pointer; transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
    position: relative; overflow: hidden;
  }
  .course-card::before {
    content:''; position: absolute; inset: 0; opacity: 0;
    background: linear-gradient(135deg, rgba(0,212,255,0.06), rgba(124,58,237,0.06));
    transition: opacity 0.3s;
  }
  .course-card:hover { transform: translateY(-5px); border-color: rgba(0,212,255,0.4); box-shadow: 0 12px 40px rgba(0,0,0,0.3); }
  .course-card:hover::before { opacity: 1; }
  .course-icon {
    width: 48px; height: 48px; border-radius: 10px; margin-bottom: 1.2rem;
    display: flex; align-items: center; justify-content: center; font-size: 1.4rem;
  }
  .course-tag {
    font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em;
    padding: 0.25rem 0.6rem; border-radius: 4px; margin-bottom: 0.8rem; display: inline-block;
    font-weight: 600;
  }
  .course-card h3 {
    font-family: 'Source Sans 3', sans-serif; font-size: 1.15rem; font-weight: 700; margin-bottom: 0.6rem;
  }
  .course-card p { color: var(--muted); font-size: 0.88rem; line-height: 1.6; margin-bottom: 1.4rem; }
  .course-meta { display: flex; gap: 1.2rem; }
  .course-meta span { font-size: 0.78rem; color: var(--muted); display: flex; align-items: center; gap: 0.3rem; }
  .course-link {
    display: inline-flex; align-items: center; gap: 0.4rem;
    color: var(--accent); font-size: 0.85rem; font-weight: 600;
    text-decoration: none; margin-top: 1.2rem;
    transition: gap 0.2s;
  }
  .course-link:hover { gap: 0.7rem; }

  /* ── WHY US ── */
  .why-section { background: var(--bg2); }
  .why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
  .why-visual {
    position: relative; display: flex; align-items: center; justify-content: center;
  }
  .why-circle {
    width: 320px; height: 320px; border-radius: 50%;
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    position: relative;
    animation: rotateSlow 20s linear infinite;
  }
  @keyframes rotateSlow { to { transform: rotate(360deg); } }
  .why-inner {
    width: 220px; height: 220px; border-radius: 50%;
    background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(124,58,237,0.12));
    border: 1px solid var(--border);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    animation: rotateSlow 20s linear infinite reverse;
    text-align: center; padding: 1.5rem;
  }
  .why-inner-num {
    font-family: 'Source Sans 3', sans-serif; font-size: 3rem; font-weight: 800;
    background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  }
  .why-inner-label { font-size: 0.75rem; color: var(--muted); letter-spacing: 0.05em; text-transform: uppercase; }
  .orbit-dot {
    position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
    top: -5px; left: 50%; transform: translateX(-50%);
    box-shadow: 0 0 12px var(--accent);
  }
  .orbit-dot2 {
    position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--accent2);
    bottom: -4px; left: 50%; transform: translateX(-50%);
    box-shadow: 0 0 12px var(--accent2);
  }
  .why-features { list-style: none; margin-top: 2rem; display: flex; flex-direction: column; gap: 1rem; }
  .why-feature {
    display: flex; align-items: flex-start; gap: 1rem;
    background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.2rem;
    transition: border-color 0.2s;
  }
  .why-feature:hover { border-color: rgba(0,212,255,0.35); }
  .why-feature-icon {
    width: 40px; height: 40px; border-radius: 8px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  }
  .why-feature-text h4 { font-family: 'Source Sans 3', sans-serif; font-size: 0.95rem; font-weight: 700; margin-bottom: 0.2rem; }
  .why-feature-text p { font-size: 0.83rem; color: var(--muted); line-height: 1.5; }

  /* ── PROCESS ── */
  .process-section { background: var(--bg); }
  .steps {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0; margin-top: 3.5rem; position: relative;
  }
  .steps::before {
    content: ''; position: absolute; top: 32px; left: 10%; right: 10%; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), var(--border), transparent);
  }
  .step { text-align: center; padding: 0 1.5rem; position: relative; }
  .step-num {
    width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 1.2rem;
    display: flex; align-items: center; justify-content: center;
    font-family: 'Source Sans 3', sans-serif; font-size: 1.3rem; font-weight: 800;
    background: var(--card); border: 1px solid var(--border); position: relative; z-index: 1;
    transition: border-color 0.2s, box-shadow 0.2s;
  }
  .step:hover .step-num { border-color: var(--accent); box-shadow: 0 0 24px rgba(0,212,255,0.3); }
  .step h3 { font-family: 'Source Sans 3', sans-serif; font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
  .step p { font-size: 0.83rem; color: var(--muted); line-height: 1.6; }

  /* ── TESTIMONIALS ── */
  .testimonials-section { background: var(--bg2); }
  .testimonials-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
  .testimonial-card {
    background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1.8rem;
    transition: transform 0.2s;
  }
  .testimonial-card:hover { transform: translateY(-3px); }
  .stars { color: var(--accent3); font-size: 0.9rem; margin-bottom: 1rem; }
  .testimonial-card blockquote { font-size: 0.93rem; color: var(--muted); line-height: 1.7; font-style: italic; margin-bottom: 1.5rem; }
  .testimonial-author { display: flex; align-items: center; gap: 0.8rem; }
  .author-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: 'Source Sans 3', sans-serif; font-weight: 700; font-size: 0.9rem; color: #fff;
    flex-shrink: 0;
  }
  .author-name { font-family: 'Source Sans 3', sans-serif; font-size: 0.9rem; font-weight: 700; }
  .author-role { font-size: 0.78rem; color: var(--muted); }

  /* ── CTA BAND ── */
  .cta-section {
    background: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(124,58,237,0.12));
    border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
    text-align: center; padding: 5rem 5%;
  }
  .cta-section .section-title { margin: 0 auto 1rem; max-width: 600px; }
  .cta-section .section-sub { margin: 0 auto 2.5rem; text-align: center; }
  .cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

  /* ── CONTACT ── */
  .contact-section { background: var(--bg); }
  .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; margin-top: 3rem; }
  .contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
  .contact-card {
    display: flex; gap: 1rem; align-items: flex-start;
    background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.2rem;
  }
  .contact-icon {
    width: 40px; height: 40px; border-radius: 8px; flex-shrink: 0;
    background: rgba(0,212,255,0.1); display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  }
  .contact-card h4 { font-family: 'Source Sans 3', sans-serif; font-size: 0.9rem; font-weight: 700; margin-bottom: 0.2rem; }
  .contact-card p { font-size: 0.85rem; color: var(--muted); }
  .contact-form { display: flex; flex-direction: column; gap: 1rem; }
  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  .form-group { display: flex; flex-direction: column; gap: 0.4rem; }
  .form-group label { font-size: 0.82rem; color: var(--muted); font-weight: 500; }
  .form-group input, .form-group select, .form-group textarea {
    background: var(--card); border: 1px solid var(--border); border-radius: 8px;
    padding: 0.75rem 1rem; color: var(--text); font-family: 'Source Sans 3', sans-serif; font-size: 0.9rem;
    transition: border-color 0.2s; outline: none; width: 100%;
  }
  .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent);
  }
  .form-group textarea { resize: vertical; min-height: 100px; }
  .form-group select option { background: var(--bg); }

  /* ── FOOTER ── */
  footer {
    background: var(--bg2); border-top: 1px solid var(--border);
    padding: 4rem 5% 2rem;
  }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
  .footer-brand p { color: var(--muted); font-size: 0.88rem; line-height: 1.7; margin-top: 1rem; max-width: 280px; }
  .footer-social { display: flex; gap: 0.7rem; margin-top: 1.5rem; }
  .social-btn {
    width: 34px; height: 34px; border-radius: 6px; background: var(--card);
    border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; text-decoration: none; color: var(--muted); transition: color 0.2s, border-color 0.2s;
  }
  .social-btn:hover { color: var(--accent); border-color: var(--accent); }
  .footer-col h4 { font-family: 'Source Sans 3', sans-serif; font-size: 0.9rem; font-weight: 700; margin-bottom: 1.2rem; }
  .footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
  .footer-links a { color: var(--muted); text-decoration: none; font-size: 0.87rem; transition: color 0.2s; }
  .footer-links a:hover { color: var(--accent); }
  .footer-bottom {
    border-top: 1px solid var(--border); padding-top: 2rem;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem;
    font-size: 0.82rem; color: var(--muted);
  }
  .footer-bottom a { color: var(--muted); text-decoration: none; }
  .footer-bottom a:hover { color: var(--accent); }

  /* ── MOBILE ── */
  @media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-stats { gap: 1.5rem; }
    .why-grid { grid-template-columns: 1fr; }
    .why-visual { display: none; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .steps::before { display: none; }
    .courses-header { flex-direction: column; align-items: flex-start; }
  }