:root {
    --ink: #0D0D0D;
    --paper: #F7F6F2;
    --electric: #d8af13;
    --electric-dim: #FF4D0015;
    --wire: #1A1A2E;
    --steel: #4A5568;
    --grid: #E8E6DF;
    --white: #FFFFFF;
    --green: #00C896;
  }

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

  body {
    font-family: 'Inter', sans-serif;
    background: var(--paper);
    color: var(--ink);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    max-width: 100%;
  }

  /* Circuit board background texture */
  body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
      linear-gradient(var(--grid) 1px, transparent 1px),
      linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.4;
    pointer-events: none;
    z-index: 0;
  }

  /* NAV */
  nav {
    position: sticky; top: 0; z-index: 100;
    background: var(--wire);
    padding: 0 5%;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
    border-bottom: 2px solid var(--electric);
  }

  .nav-logo {
    font-family: 'Space Mono', monospace;
    color: var(--white);
    font-size: 1.2rem;
    letter-spacing: -0.02em;
    text-decoration: none;
  }

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

  .nav-links {
    display: flex; gap: 2rem; list-style: none;
  }

  .nav-links a {
    color: #CBD5E0;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: color 0.2s;
  }

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

  .nav-cta {
    background: var(--electric);
    color: var(--white) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 4px;
    font-weight: 600 !important;
  }

  /* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 200;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Hamburger open state */
.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); }

@media (max-width: 768px) {
  /* Show hamburger */
  .hamburger { display: flex; }

  /* Mobile dropdown menu */
  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: var(--wire);
    flex-direction: column;
    padding: 1.5rem 5%;
    gap: 0;
    border-bottom: 2px solid var(--gold, #D8AF13);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    z-index: 99;
  }

  .nav-links.open { display: flex; }

  .nav-links li { border-bottom: 1px solid #1E293B; }
  .nav-links li:last-child { border-bottom: none; }

  .nav-links a {
    display: block;
    padding: 1rem 0;
    font-size: 1rem;
    color: #CBD5E0;
  }

  .nav-links a.nav-cta {
    margin-top: 0.75rem;
    background: var(--gold, #D8AF13);
    color: var(--ink, #0D0D0D) !important;
    text-align: center;
    padding: 0.875rem;
    border-radius: 6px;
    font-weight: 700;
  }
}
  /* HERO */
  .hero {
    position: relative; z-index: 1;
    background: var(--wire);
    padding: 6rem 5% 5rem;
    overflow: hidden;
  }

  .hero::after {
    content: '';
    position: absolute;
    right: -100px; top: -100px;
    width: 600px; height: 600px;
    background: radial-gradient(circle, #FF4D0020 0%, transparent 70%);
    pointer-events: none;
  }

  .hero-eyebrow {
    font-family: 'Space Mono', monospace;
    font-size: 0.75rem;
    color: var(--electric);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    display: flex; align-items: center; gap: 0.75rem;
  }

  .hero-eyebrow::before {
    content: '';
    display: inline-block;
    width: 32px; height: 2px;
    background: var(--electric);
  }

  .hero h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 700;
    color: var(--white);
    line-height: 1.1;
    max-width: 780px;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
  }

  .hero h1 em {
    font-style: normal;
    color: var(--electric);
  }

  .hero-sub {
    font-size: 1.125rem;
    color: #94A3B8;
    max-width: 580px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
  }

  .hero-ctas {
    display: flex; gap: 1rem; flex-wrap: wrap;
    margin-bottom: 3.5rem;
  }

  .btn-primary {
    background: var(--electric);
    color: var(--white);
    padding: 0.875rem 2rem;
    border-radius: 4px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    display: inline-flex; align-items: center; gap: 0.5rem;
    transition: transform 0.15s, box-shadow 0.15s;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px #FF4D0040;
  }

  .btn-secondary {
    background: transparent;
    color: var(--white);
    padding: 0.875rem 2rem;
    border-radius: 4px;
    border: 1px solid #334155;
    font-weight: 500;
    text-decoration: none;
    transition: border-color 0.2s;
  }

  .btn-secondary:hover { border-color: var(--electric); color: var(--electric); }

  .trust-bar {
    display: flex; flex-wrap: wrap; gap: 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid #1E293B;
  }

  .trust-item {
    font-size: 0.8rem;
    color: #64748B;
    display: flex; align-items: center; gap: 0.4rem;
  }

  .trust-item strong { color: #94A3B8; }

  /* SECTION BASE */
  section { position: relative; z-index: 1; }

  .section-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 5rem 5%;
  }

  .section-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--electric);
    margin-bottom: 1rem;
  }

  h2.section-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--ink);
    margin-bottom: 1rem;
    line-height: 1.2;
  }

  .section-intro {
    font-size: 1.05rem;
    color: var(--steel);
    max-width: 620px;
    margin-bottom: 3rem;
    line-height: 1.7;
  }

  /* PROBLEM SECTION */
  .problem-section { background: var(--white); }

  .problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
  }

  .problem-card {
    border: 1px solid var(--grid);
    border-radius: 8px;
    padding: 2rem;
    background: var(--paper);
    position: relative;
    overflow: hidden;
  }

  .problem-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 100%;
    background: var(--electric);
  }

  .problem-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--ink);
  }

  .problem-card p {
    font-size: 0.95rem;
    color: var(--steel);
    line-height: 1.65;
  }

  .founder-quote {
    background: var(--wire);
    border-radius: 8px;
    padding: 2rem 2.5rem;
    color: var(--white);
    font-size: 1.1rem;
    line-height: 1.7;
    font-style: italic;
    position: relative;
  }

  .founder-quote::before {
    content: '"';
    font-family: 'Space Grotesk', sans-serif;
    font-size: 5rem;
    color: var(--electric);
    position: absolute;
    top: -0.5rem; left: 1.5rem;
    line-height: 1;
    opacity: 0.6;
  }

  .founder-quote cite {
    display: block;
    margin-top: 1rem;
    font-style: normal;
    font-size: 0.875rem;
    color: #64748B;
  }

  /* VALUE PROPS */
  .value-section { background: var(--paper); }

  .value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
  }

  .value-card {
    padding: 2rem;
    border-radius: 8px;
    background: var(--white);
    border: 1px solid var(--grid);
  }

  .value-icon {
    width: 48px; height: 48px;
    background: var(--electric-dim);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
  }

  .value-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
  }

  .value-card p { font-size: 0.95rem; color: var(--steel); line-height: 1.65; }

  /* COURSES */
  .courses-section { background: var(--white); }

  .courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
  }

  .course-card {
    border: 1px solid var(--grid);
    border-radius: 8px;
    overflow: hidden;
    background: var(--paper);
    display: flex; flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
  }

  .course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.1);
  }

  .course-card.featured {
    border-color: var(--electric);
    border-width: 2px;
  }

  .course-badge {
    background: var(--electric);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.4rem 1rem;
    font-family: 'Space Mono', monospace;
  }

  .course-body { padding: 1.75rem; flex: 1; }

  .course-emoji { font-size: 2rem; margin-bottom: 1rem; }

  .course-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--ink);
  }

  .course-card p { font-size: 0.9rem; color: var(--steel); margin-bottom: 1.25rem; }

  .course-meta {
    display: flex; flex-direction: column; gap: 0.3rem;
    font-size: 0.8rem; color: var(--steel);
    padding: 1rem 1.75rem;
    border-top: 1px solid var(--grid);
    background: var(--white);
  }

  .course-meta span { display: flex; align-items: center; gap: 0.4rem; }

  .course-footer {
    padding: 1.25rem 1.75rem;
    background: var(--white);
    border-top: 1px solid var(--grid);
  }

  .btn-course {
    display: block;
    text-align: center;
    background: var(--wire);
    color: var(--white);
    padding: 0.75rem;
    border-radius: 4px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: background 0.2s;
  }

  .course-card.featured .btn-course { background: var(--electric); }
  .btn-course:hover { opacity: 0.85; }

  /* FOUNDER */
  .founder-section { background: var(--wire); color: var(--white); }
  .founder-section .section-heading { color: var(--white); }
  .founder-section .section-intro { color: #94A3B8; }

  .founder-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: start;
  }

  .founder-photo-box {
    background: #1E293B;
    border-radius: 12px;
    aspect-ratio: 3/4;
    display: flex; align-items: center; justify-content: center;
    flex-direction: column;
    gap: 0.75rem;
    border: 2px dashed #334155;
    color: #475569;
    font-size: 0.8rem;
    text-align: center;
    padding: 1rem;
  }

  .founder-photo-box .photo-icon { font-size: 3rem; }

  .founder-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.25rem;
  }

  .founder-title {
    font-size: 0.875rem;
    color: var(--electric);
    font-family: 'Space Mono', monospace;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
  }

  .founder-bio {
    color: #94A3B8;
    line-height: 1.75;
    margin-bottom: 2rem;
    font-size: 0.975rem;
  }

  .creds-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .cred-item {
    background: #1E293B;
    border-radius: 6px;
    padding: 0.875rem 1rem;
    font-size: 0.8rem;
    color: #CBD5E0;
    display: flex; align-items: flex-start; gap: 0.5rem;
    border-left: 3px solid var(--electric);
  }

  /* STATS */
  .stats-section { background: var(--paper); }

  .stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
  }

  .stat-box {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--grid);
  }

  .stat-number {
    font-family: 'Space Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--electric);
    display: block;
    line-height: 1;
    margin-bottom: 0.5rem;
  }

  .stat-label {
    font-size: 0.825rem;
    color: var(--steel);
    font-weight: 500;
  }

  .partners-row {
    display: flex; align-items: center; gap: 2rem; flex-wrap: wrap;
    padding: 2rem;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--grid);
  }

  .partners-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--steel);
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .partner-chip {
    background: var(--paper);
    border: 1px solid var(--grid);
    border-radius: 4px;
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ink);
  }

  /* SCHOOL B2B */
  .school-section { background: var(--ink); }

  .school-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 5rem 5%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
  }

  .school-section h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
  }

  .school-section p { color: #94A3B8; line-height: 1.7; margin-bottom: 2rem; }

  .school-offerings {
    display: flex; flex-direction: column; gap: 1rem;
  }

  .offering-row {
    display: flex; align-items: center; gap: 1rem;
    background: #1A1A2E;
    border-radius: 6px;
    padding: 1rem 1.25rem;
    border: 1px solid #1E293B;
  }

  .offering-check {
    width: 24px; height: 24px;
    background: var(--green);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem;
    color: white;
    flex-shrink: 0;
  }

  .offering-row span { color: #E2E8F0; font-size: 0.95rem; font-weight: 500; }

  /* FAQ */
  .faq-section { background: var(--white); }

  .faq-list {
    max-width: 720px;
    display: flex; flex-direction: column; gap: 1px;
  }

  .faq-item {
    border: 1px solid var(--grid);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 0.5rem;
  }

  .faq-q {
    padding: 1.25rem 1.5rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex; justify-content: space-between; align-items: center;
    background: var(--paper);
    user-select: none;
  }

  .faq-q:hover { background: var(--white); }
  .faq-q::after { content: '+'; color: var(--electric); font-size: 1.25rem; }
  .faq-item.open .faq-q::after { content: '−'; }

  .faq-a {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.2s;
    font-size: 0.95rem;
    color: var(--steel);
    line-height: 1.7;
    background: var(--white);
  }

  .faq-item.open .faq-a {
    max-height: 300px;
    padding: 1.25rem 1.5rem;
  }

  /* FINAL CTA */
  .final-cta {
    background: linear-gradient(135deg, var(--electric) 0%, #CC3A00 100%);
    text-align: center;
    padding: 6rem 5%;
    position: relative; z-index: 1;
    overflow: hidden;
  }

  .final-cta::before {
    content: '</>';
    position: absolute;
    font-family: 'Space Mono', monospace;
    font-size: 20rem;
    color: white;
    opacity: 0.04;
    right: -2rem;
    top: -3rem;
    pointer-events: none;
    line-height: 1;
  }

  .final-cta h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.03em;
    max-width: 700px;
    margin: 0 auto 1rem;
    line-height: 1.2;
  }

  .final-cta p {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    max-width: 540px;
    margin: 0 auto 2.5rem;
    line-height: 1.65;
  }

  .final-btns {
    display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
  }

  .btn-white {
    background: var(--white);
    color: var(--electric);
    padding: 0.875rem 2rem;
    border-radius: 4px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.15s;
  }

  .btn-white:hover { transform: translateY(-2px); }

  .btn-outline-white {
    background: transparent;
    color: var(--white);
    padding: 0.875rem 2rem;
    border-radius: 4px;
    border: 2px solid rgba(255,255,255,0.5);
    font-weight: 600;
    text-decoration: none;
    transition: border-color 0.2s;
  }

  .btn-outline-white:hover { border-color: white; }

  /* FOOTER */
  footer {
    background: var(--ink);
    padding: 3rem 5% 2rem;
    position: relative; z-index: 1;
  }

  .footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
  }

  .footer-brand .footer-logo {
    font-family: 'Space Mono', monospace;
    font-size: 1.3rem;
    color: var(--white);
    text-decoration: none;
    display: block;
    margin-bottom: 0.75rem;
  }

  .footer-brand .footer-logo span { color: var(--electric); }

  .footer-brand p {
    font-size: 0.875rem;
    color: #4A5568;
    line-height: 1.65;
    max-width: 280px;
    margin-bottom: 1rem;
  }

  .footer-contact a {
    display: block;
    color: #64748B;
    text-decoration: none;
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
  }

  .footer-contact a:hover { color: var(--electric); }

  .footer-col h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #64748B;
    margin-bottom: 1rem;
  }

  .footer-col ul { list-style: none; }

  .footer-col li { margin-bottom: 0.5rem; }

  .footer-col a {
    color: #4A5568;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
  }

  .footer-col a:hover { color: var(--electric); }

  .footer-bottom {
    border-top: 1px solid #1A1A1A;
    padding-top: 1.5rem;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 1rem;
  }

  .footer-bottom p {
    font-size: 0.8rem;
    color: #2D3748;
  }

  .footer-legal { display: flex; gap: 1.5rem; }

  .footer-legal a {
    font-size: 0.8rem;
    color: #2D3748;
    text-decoration: none;
  }

  .footer-legal a:hover { color: var(--electric); }

  /* Floating WhatsApp */
  .whatsapp-float {
    position: fixed;
    bottom: 2rem; right: 2rem;
    background: #25D366;
    color: white;
    width: 56px; height: 56px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    z-index: 200;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: transform 0.2s;
  }

  .whatsapp-float:hover { transform: scale(1.1); }

  /* Mobile responsive */
  @media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 2rem; }
    .hero-ctas { flex-direction: column; }
    .founder-layout { grid-template-columns: 1fr; }
    .founder-photo-box { aspect-ratio: 16/9; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .school-inner { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr; }
    .creds-grid { grid-template-columns: 1fr; }
  }