:root {
    --black: #020408;
    --deep: #050d1a;
    --blue-dark: #0a1628;
    --blue: #0066ff;
    --blue-bright: #00aaff;
    --cyan: #00e5ff;
    --white: #f0f4ff;
    --gray: #8899bb;
    --glow: 0 0 20px rgba(0,170,255,0.4), 0 0 60px rgba(0,102,255,0.2);
    --glow-sm: 0 0 10px rgba(0,170,255,0.3);
    --font-display: 'Orbitron', monospace;
    --font-body: 'Rajdhani', sans-serif;
    --font-mono: 'Share Tech Mono', monospace;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--black);
    color: var(--white);
    font-family: var(--font-body);
    font-size: 18px;
    overflow-x: hidden;
    cursor: default;
  }

  /* ── SCROLLBAR ── */
  ::-webkit-scrollbar { width: 4px; }
  ::-webkit-scrollbar-track { background: var(--deep); }
  ::-webkit-scrollbar-thumb { background: var(--blue); border-radius: 2px; }

  /* ── CANVAS BG ── */
  #bg-canvas {
    position: fixed; inset: 0; z-index: -1;
    pointer-events: none; opacity: 0.35;
  }

  /* ── NAV MOBILE OVERLAY ── */
  #nav-overlay {
    display: none;
    position: fixed; inset: 0; top: 56px;
    z-index: 998;
    background: rgba(2, 4, 8, 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }
  #nav-overlay.open { display: block; }

  /* ── NAV ── */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 40px;
    display: flex; align-items: center; justify-content: space-between;
    background: rgba(2,4,8,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,170,255,0.15);
    transition: all 0.3s;
  }
  nav.scrolled {
    padding: 10px 40px;
    background: rgba(2,4,8,0.97);
    border-bottom-color: rgba(0,170,255,0.3);
  }
  .nav-logo {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.3rem;
    color: var(--white);
    text-decoration: none;
    letter-spacing: 2px;
  }
  .nav-logo span { color: var(--cyan); }
  .nav-links {
    display: flex; gap: 32px; list-style: none;
  }
  .nav-links a {
    color: var(--gray); text-decoration: none;
    font-family: var(--font-body); font-weight: 600;
    font-size: 0.9rem; letter-spacing: 1px; text-transform: uppercase;
    transition: color 0.2s;
    position: relative;
  }
  .nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 1px;
    background: var(--cyan); transition: width 0.3s;
  }
  .nav-links a:hover { color: var(--cyan); }
  .nav-links a:hover::after { width: 100%; }
  .nav-cta {
    background: var(--blue); color: var(--white) !important;
    padding: 8px 20px; border-radius: 2px;
    font-weight: 700 !important;
    box-shadow: var(--glow-sm);
    transition: background 0.2s, box-shadow 0.2s !important;
  }
  .nav-cta:hover {
    background: var(--cyan) !important;
    color: var(--black) !important;
    box-shadow: var(--glow) !important;
  }
  .nav-cta::after { display: none !important; }
  .hamburger {
    display: none; flex-direction: column; gap: 5px;
    cursor: pointer; background: none; border: none;
  }
  .hamburger span {
    display: block; width: 24px; height: 2px;
    background: var(--cyan); transition: all 0.3s;
  }

  /* ── HERO ── */
  #hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    padding: 120px 40px 60px;
    overflow: hidden;
  }
  .hero-grid {
    position: absolute; inset: 0; z-index: 1;
    background-image:
      linear-gradient(rgba(0,102,255,0.06) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,102,255,0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
  }
  @keyframes gridMove {
    from { transform: translateY(0); }
    to { transform: translateY(60px); }
  }
  .hero-glow {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%,-50%);
    width: 800px; height: 800px;
    background: radial-gradient(ellipse, rgba(0,102,255,0.15) 0%, transparent 70%);
    z-index: 1; pointer-events: none;
    animation: pulse 4s ease-in-out infinite;
  }
  @keyframes pulse {
    0%,100% { opacity: 0.6; transform: translate(-50%,-50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%,-50%) scale(1.1); }
  }
  .hero-content {
    position: relative; z-index: 2;
    text-align: center; max-width: 900px;
  }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(0,170,255,0.1); border: 1px solid rgba(0,170,255,0.3);
    padding: 6px 16px; border-radius: 100px;
    font-family: var(--font-mono); font-size: 0.75rem;
    color: var(--cyan); letter-spacing: 2px; text-transform: uppercase;
    margin-bottom: 32px;
    animation: fadeInDown 0.8s ease both;
  }
  .hero-badge::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--cyan);
    animation: blink 1.2s ease-in-out infinite;
  }
  @keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.2; } }
  .hero-title {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(3rem, 9vw, 7rem);
    line-height: 0.95;
    letter-spacing: -1px;
    color: var(--white);
    margin-bottom: 16px;
    animation: fadeInUp 0.9s ease 0.1s both;
  }
  .hero-title .accent { color: var(--cyan); text-shadow: var(--glow); }
  .hero-year {
    display: block;
    color: transparent;
    -webkit-text-stroke: 1px rgba(0,170,255,0.4);
    font-size: clamp(3.5rem, 11vw, 8.5rem);
    letter-spacing: 8px;
    line-height: 1;
    margin-bottom: 32px;
    animation: fadeInUp 0.9s ease 0.2s both;
  }
  .hero-sub {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--gray);
    font-weight: 500;
    letter-spacing: 1px;
    max-width: 640px;
    margin: 0 auto 48px;
    line-height: 1.6;
    animation: fadeInUp 0.9s ease 0.3s both;
  }
  .hero-sub strong { color: var(--white); }
  .hero-btns {
    display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
    animation: fadeInUp 0.9s ease 0.4s both;
  }
  .btn-primary {
    background: var(--blue);
    color: var(--white); text-decoration: none;
    padding: 14px 36px; border-radius: 2px;
    font-family: var(--font-display);
    font-weight: 700; font-size: 0.8rem;
    letter-spacing: 2px; text-transform: uppercase;
    box-shadow: var(--glow);
    transition: all 0.3s; border: none; cursor: pointer;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
  }
  .btn-primary:hover {
    background: var(--cyan); color: var(--black);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0,229,255,0.6), 0 0 80px rgba(0,170,255,0.3);
  }
  .btn-secondary {
    background: transparent;
    color: var(--cyan); text-decoration: none;
    padding: 13px 36px; border-radius: 2px;
    font-family: var(--font-display);
    font-weight: 700; font-size: 0.8rem;
    letter-spacing: 2px; text-transform: uppercase;
    border: 1px solid rgba(0,170,255,0.4);
    transition: all 0.3s; cursor: pointer;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
  }
  .btn-secondary:hover {
    background: rgba(0,170,255,0.1);
    border-color: var(--cyan);
    box-shadow: var(--glow-sm);
    transform: translateY(-2px);
  }

  /* ── COUNTDOWN ── */
  #countdown {
    position: relative; z-index: 2;
    background: rgba(5,13,26,0.8);
    border-top: 1px solid rgba(0,170,255,0.15);
    border-bottom: 1px solid rgba(0,170,255,0.15);
    padding: 32px 40px;
  }
  .countdown-inner {
    max-width: 800px; margin: 0 auto;
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; gap: 12px;
  }
  .countdown-label {
    font-family: var(--font-mono);
    font-size: 0.75rem; letter-spacing: 3px;
    color: var(--gray); text-transform: uppercase;
  }
  .countdown-units {
    display: flex; gap: 8px; align-items: center;
    flex-wrap: nowrap; justify-content: center;
  }
  .unit {
    display: flex; flex-direction: column; align-items: center;
    background: rgba(0,102,255,0.08);
    border: 1px solid rgba(0,170,255,0.2);
    padding: 10px 0; width: 72px;
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
  }
  .unit-num {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 5vw, 2rem); font-weight: 700;
    color: var(--cyan); line-height: 1;
    text-shadow: var(--glow-sm);
  }
  .unit-label {
    font-family: var(--font-mono);
    font-size: 0.55rem; color: var(--gray);
    letter-spacing: 2px; text-transform: uppercase;
    margin-top: 4px;
  }
  .unit-sep {
    font-family: var(--font-display);
    font-size: 1.5rem; color: var(--blue);
    animation: blink 1s ease-in-out infinite;
    flex-shrink: 0;
  }

  /* ── SECTIONS COMMON ── */
  section { position: relative; z-index: 2; padding: 100px 40px; }
  .section-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem; letter-spacing: 4px;
    text-transform: uppercase; color: var(--blue-bright);
    margin-bottom: 12px;
    display: flex; align-items: center; gap: 10px;
  }
  .section-tag::before {
    content: '//'; color: var(--blue); font-size: 0.8rem;
  }
  .section-title {
    font-family: var(--font-display);
    font-weight: 700; font-size: clamp(1.8rem, 4vw, 3rem);
    line-height: 1.1; letter-spacing: -0.5px;
    margin-bottom: 20px;
  }
  .section-title .accent { color: var(--cyan); }
  .section-sub {
    color: var(--gray); max-width: 600px;
    line-height: 1.7; font-size: 1rem;
  }
  .divider {
    width: 60px; height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    margin: 20px 0;
  }
  .centered { text-align: center; }
  .centered .section-tag { justify-content: center; }
  .centered .section-sub { margin: 0 auto; }
  .centered .divider { margin: 20px auto; }

  /* ── ABOUT ── */
  #about {
    background: linear-gradient(180deg, var(--black) 0%, var(--deep) 100%);
  }
  .about-grid {
    max-width: 1100px; margin: 60px auto 0;
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; align-items: center;
  }
  .about-visual {
    position: relative;
    display: flex; align-items: center; justify-content: center;
  }
  .hex-grid {
    display: grid;
    grid-template-columns: repeat(4, 70px);
    gap: 8px;
    transform: rotate(-10deg);
  }
  .hex {
    width: 70px; height: 70px;
    background: rgba(0,102,255,0.08);
    border: 1px solid rgba(0,170,255,0.2);
    clip-path: polygon(50% 0%,100% 25%,100% 75%,50% 100%,0% 75%,0% 25%);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    transition: all 0.5s;
  }
  .hex.active {
    background: rgba(0,102,255,0.3);
    border-color: var(--cyan);
    box-shadow: 0 0 20px rgba(0,170,255,0.3);
  }
  .about-stats {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 16px; margin-top: 40px;
  }
  .stat-card {
    background: rgba(0,102,255,0.06);
    border: 1px solid rgba(0,170,255,0.15);
    padding: 20px;
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
    transition: border-color 0.3s;
  }
  .stat-card:hover { border-color: rgba(0,170,255,0.4); }
  .stat-num {
    font-family: var(--font-display);
    font-size: 2rem; font-weight: 700;
    color: var(--cyan); line-height: 1;
  }
  .stat-desc { color: var(--gray); font-size: 0.85rem; margin-top: 4px; }

  /* ── TOPICS ── */
  #topics { background: var(--deep); }
  .topics-grid {
    max-width: 1100px; margin: 60px auto 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
  }
  .topic-card {
    background: rgba(2,4,8,0.8);
    border: 1px solid rgba(0,170,255,0.12);
    padding: 36px 24px;
    text-align: center;
    clip-path: polygon(12px 0%, 100% 0%, calc(100% - 12px) 100%, 0% 100%);
    transition: all 0.4s;
    cursor: default;
  }
  .topic-card:hover {
    border-color: rgba(0,229,255,0.4);
    background: rgba(0,102,255,0.08);
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,102,255,0.2);
  }
  .topic-icon {
    font-size: 2.5rem; margin-bottom: 16px;
    display: block;
    filter: grayscale(0.3);
    transition: filter 0.3s, transform 0.3s;
  }
  .topic-card:hover .topic-icon { filter: none; transform: scale(1.1); }
  .topic-name {
    font-family: var(--font-display);
    font-size: 0.85rem; font-weight: 700;
    letter-spacing: 1px; color: var(--white);
    margin-bottom: 10px;
  }
  .topic-desc { color: var(--gray); font-size: 0.85rem; line-height: 1.5; }

  /* ── SPEAKERS ── */
  #speakers { background: var(--black); }
  .speakers-grid {
    max-width: 1100px; margin: 60px auto 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
  }
  .speaker-card {
    background: rgba(5,13,26,0.9);
    border: 1px solid rgba(0,170,255,0.15);
    overflow: hidden;
    clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
    transition: all 0.4s;
  }
  .speaker-card:hover {
    border-color: rgba(0,229,255,0.35);
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(0,102,255,0.2);
  }
  .speaker-img {
    width: 100%; height: 240px; object-fit: cover;
    background: linear-gradient(135deg, var(--blue-dark) 0%, rgba(0,102,255,0.3) 100%);
    display: flex; align-items: center; justify-content: center;
    font-size: 4rem; color: rgba(0,170,255,0.3);
    position: relative; overflow: hidden;
  }
  .speaker-img img {
    width: 100%; height: 100%; object-fit: cover;
    position: absolute; inset: 0;
  }
  .speaker-img-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(2,4,8,0.9));
  }
  .speaker-info { padding: 20px; }
  .speaker-name {
    font-family: var(--font-display);
    font-size: 0.95rem; font-weight: 700;
    color: var(--white); margin-bottom: 4px;
  }
  .speaker-role { color: var(--blue-bright); font-size: 0.8rem; margin-bottom: 6px; }
  .speaker-company { color: var(--gray); font-size: 0.8rem; }
  .speaker-tag {
    display: inline-block; margin-top: 10px;
    background: rgba(0,102,255,0.15); border: 1px solid rgba(0,102,255,0.3);
    color: var(--cyan); padding: 2px 10px;
    font-family: var(--font-mono); font-size: 0.65rem;
    letter-spacing: 1px; text-transform: uppercase;
  }
  .speakers-note {
    text-align: center; margin-top: 40px;
    font-family: var(--font-mono); font-size: 0.8rem;
    color: var(--gray); letter-spacing: 2px;
  }
  .speakers-note span { color: var(--cyan); }

  /* ── AGENDA ── */
  #agenda { background: var(--deep); }
  .agenda-wrap { max-width: 800px; margin: 60px auto 0; }
  .agenda-day {
    font-family: var(--font-mono); font-size: 0.75rem;
    letter-spacing: 3px; text-transform: uppercase;
    color: var(--blue-bright); margin-bottom: 24px;
    display: flex; align-items: center; gap: 16px;
  }
  .agenda-day::after {
    content: ''; flex: 1; height: 1px;
    background: linear-gradient(90deg, rgba(0,170,255,0.3), transparent);
  }
  .timeline { position: relative; padding-left: 40px; }
  .timeline::before {
    content: ''; position: absolute; left: 8px; top: 0; bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, var(--blue), rgba(0,102,255,0.1));
  }
  .tl-item {
    position: relative; padding: 0 0 32px;
    animation: fadeInLeft 0.5s ease both;
  }
  .tl-dot {
    position: absolute; left: -40px; top: 6px;
    width: 16px; height: 16px;
    background: var(--blue-dark); border: 2px solid var(--blue);
    border-radius: 50%;
    transition: border-color 0.3s, background 0.3s;
  }
  .tl-item:hover .tl-dot {
    border-color: var(--cyan); background: var(--blue);
    box-shadow: 0 0 12px var(--blue);
  }
  .tl-time {
    font-family: var(--font-mono); font-size: 0.7rem;
    color: var(--cyan); letter-spacing: 1px; margin-bottom: 6px;
  }
  .tl-title {
    font-family: var(--font-body); font-weight: 700;
    font-size: 1.05rem; color: var(--white); margin-bottom: 4px;
  }
  .tl-speaker { color: var(--gray); font-size: 0.85rem; }
  .tl-type {
    display: inline-block; margin-top: 8px;
    padding: 2px 10px; font-size: 0.65rem;
    font-family: var(--font-mono); letter-spacing: 1px; text-transform: uppercase;
  }
  .tl-type.conf { background: rgba(0,102,255,0.15); color: var(--blue-bright); border: 1px solid rgba(0,102,255,0.3); }
  .tl-type.break { background: rgba(0,229,255,0.08); color: var(--gray); border: 1px solid rgba(0,229,255,0.15); }
  .tl-type.net { background: rgba(0,200,100,0.1); color: #00e5a0; border: 1px solid rgba(0,200,100,0.2); }
  .tl-type.open { background: rgba(255,200,0,0.08); color: #ffd700; border: 1px solid rgba(255,200,0,0.2); }

  /* ── SPONSORS ── */
  #sponsors { background: var(--black); }
  .sponsor-tiers { max-width: 1000px; margin: 60px auto 0; }
  .tier-label {
    font-family: var(--font-mono); font-size: 0.65rem;
    letter-spacing: 3px; text-transform: uppercase;
    text-align: center; margin-bottom: 20px;
  }
  .tier-label.gold { color: #ffd700; }
  .tier-label.silver { color: #b0c0d0; }
  .tier-label.bronze { color: #cd7f32; }
  .sponsor-row {
    display: flex; justify-content: center;
    gap: 20px; flex-wrap: wrap; margin-bottom: 40px;
  }
  .sponsor-slot {
    background: rgba(5,13,26,0.9);
    border: 1px dashed rgba(0,170,255,0.2);
    display: flex; align-items: center; justify-content: center;
    color: rgba(0,170,255,0.2);
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 2px; text-transform: uppercase;
    transition: all 0.3s;
    cursor: pointer;
  }
  .sponsor-slot:hover { border-color: rgba(0,170,255,0.5); color: rgba(0,170,255,0.5); }
  .sponsor-slot.lg { width: 220px; height: 90px; font-size: 0.75rem; }
  .sponsor-slot.md { width: 170px; height: 70px; }
  .sponsor-slot.sm { width: 140px; height: 55px; font-size: 0.6rem; }
  .sponsor-cta {
  text-align: center; margin-top: 40px;
  padding: 0 20px;
}
.sponsor-cta p { color: var(--gray); margin-bottom: 16px; font-size: 0.95rem; }
.sponsor-cta .btn-secondary {
  display: inline-block;
  max-width: 100%;
  white-space: normal;
  word-break: break-word;
  line-height: 1.4;
  clip-path: none;
  border-radius: 2px;
}

  /* ── LOCATION ── */
  #location { background: var(--deep); }
  .location-grid {
    max-width: 1100px; margin: 60px auto 0;
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 40px; align-items: start;
  }
  /* .location-info { } */
  .location-detail {
    display: flex; align-items: flex-start; gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: rgba(0,102,255,0.05);
    border: 1px solid rgba(0,170,255,0.1);
    clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
  }
  .location-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
  .location-text strong {
    display: block; font-family: var(--font-display);
    font-size: 0.85rem; color: var(--white); margin-bottom: 4px;
  }
  .location-text span { color: var(--gray); font-size: 0.9rem; }
  .map-container {
    background: rgba(5,13,26,0.9);
    border: 1px solid rgba(0,170,255,0.15);
    height: 380px; overflow: hidden;
    clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
    position: relative;
  }
  .map-container iframe {
    width: 100%; height: 100%; border: none;
    filter: invert(0.9) hue-rotate(180deg) saturate(0.8) brightness(0.9);
  }
  .map-overlay {
    position: absolute; inset: 0; pointer-events: none;
    border: 1px solid rgba(0,170,255,0.2);
    clip-path: inherit;
  }

  /* ── REGISTER ── */
  #register {
    background: linear-gradient(180deg, var(--black) 0%, var(--blue-dark) 50%, var(--black) 100%);
  }
  .register-form-wrap {
    max-width: 600px; margin: 60px auto 0;
    background: rgba(5,13,26,0.9);
    border: 1px solid rgba(0,170,255,0.2);
    padding: 48px;
    clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
    position: relative;
    overflow: hidden;
  }
  .register-form-wrap::before {
    content: ''; position: absolute;
    top: -100px; right: -100px;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(0,102,255,0.1), transparent 70%);
    pointer-events: none;
  }
  .form-row { margin-bottom: 20px; }
  .form-row label {
    display: block;
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 2px; text-transform: uppercase;
    color: var(--blue-bright); margin-bottom: 8px;
  }
  .form-row input, .form-row select {
    width: 100%; padding: 12px 16px;
    background: rgba(0,102,255,0.06);
    border: 1px solid rgba(0,170,255,0.2);
    color: var(--white);
    font-family: var(--font-body); font-size: 1rem;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
    appearance: none;
    -webkit-appearance: none;
  }
  .form-row input::placeholder { color: rgba(136,153,187,0.5); }
  .form-row input:focus, .form-row select:focus {
    border-color: var(--cyan);
    box-shadow: 0 0 15px rgba(0,229,255,0.15);
  }
  .form-row select option { background: var(--deep); }
  .form-submit {
    width: 100%; padding: 16px;
    background: var(--blue); color: var(--white);
    border: none; cursor: pointer;
    font-family: var(--font-display); font-weight: 700;
    font-size: 0.9rem; letter-spacing: 3px;
    text-transform: uppercase;
    clip-path: polygon(10px 0%, 100% 0%, calc(100% - 10px) 100%, 0% 100%);
    transition: all 0.3s;
    margin-top: 8px;
    box-shadow: var(--glow);
  }
  .form-submit:hover {
    background: var(--cyan); color: var(--black);
    box-shadow: 0 0 40px rgba(0,229,255,0.5);
    transform: translateY(-2px);
  }
  .form-note {
    text-align: center; margin-top: 16px;
    color: var(--gray); font-size: 0.8rem;
  }
  .form-note a { color: var(--cyan); text-decoration: none; }
  .form-success {
    display: none;
    text-align: center; padding: 40px 20px;
  }
  .form-success .success-icon { font-size: 3rem; margin-bottom: 16px; }
  .form-success h3 {
    font-family: var(--font-display); color: var(--cyan);
    margin-bottom: 8px;
  }
  .form-success p { color: var(--gray); }

  /* ── FORM STATES ── */
  .form-error {
    display: none; margin-top: 14px;
    background: rgba(255,60,60,0.08);
    border: 1px solid rgba(255,80,80,0.3);
    color: #ff8080;
    padding: 12px 16px;
    font-family: var(--font-mono); font-size: 0.75rem;
    letter-spacing: 1px;
    clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
  }
  .form-submit:disabled {
    opacity: 0.6; cursor: not-allowed; transform: none !important;
  }
  .form-submit.loading::after {
    content: ''; display: inline-block;
    width: 12px; height: 12px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    margin-left: 10px;
    animation: spin 0.7s linear infinite;
    vertical-align: middle;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  /* ── FOOTER ── */
  footer {
    position: relative; z-index: 2;
    background: var(--deep);
    border-top: 1px solid rgba(0,170,255,0.15);
    padding: 60px 40px 30px;
  }
  .footer-grid {
    max-width: 1100px; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr;
    gap: 60px; margin-bottom: 40px;
  }
  /* .footer-brand {} */
  .footer-logo {
    font-family: var(--font-display); font-weight: 900;
    font-size: 1.5rem; color: var(--white);
    margin-bottom: 12px;
  }
  .footer-logo span { color: var(--cyan); }
  .footer-tagline { color: var(--gray); font-size: 0.9rem; line-height: 1.6; margin-bottom: 24px; }
  .footer-socials { display: flex; gap: 12px; }
  .social-btn {
    width: 40px; height: 40px;
    background: rgba(0,102,255,0.08); border: 1px solid rgba(0,170,255,0.2);
    display: flex; align-items: center; justify-content: center;
    color: var(--gray); text-decoration: none; font-size: 1rem;
    transition: all 0.3s;
    clip-path: polygon(4px 0%, 100% 0%, calc(100% - 4px) 100%, 0% 100%);
  }
  .social-btn:hover {
    background: rgba(0,102,255,0.25); color: var(--cyan);
    border-color: var(--cyan);
    box-shadow: var(--glow-sm);
  }
  .footer-col h4 {
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 3px; text-transform: uppercase;
    color: var(--blue-bright); margin-bottom: 20px;
  }
  .footer-col ul { list-style: none; }
  .footer-col ul li { margin-bottom: 10px; }
  .footer-col ul a {
    color: var(--gray); text-decoration: none; font-size: 0.9rem;
    transition: color 0.2s;
  }
  .footer-col ul a:hover { color: var(--cyan); }
  .footer-bottom {
    max-width: 1100px; margin: 0 auto;
    border-top: 1px solid rgba(0,170,255,0.1);
    padding-top: 24px;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px;
  }
  .footer-copy { color: var(--gray); font-size: 0.8rem; }
  .footer-edition {
    font-family: var(--font-mono); font-size: 0.7rem;
    color: var(--blue); letter-spacing: 2px;
  }

  /* ── WHATSAPP FLOAT ── */
  .wa-btn {
    position: fixed; bottom: 28px; right: 28px; z-index: 9000;
    width: 56px; height: 56px;
    background: #25D366;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 20px rgba(37,211,102,0.5);
    cursor: pointer; text-decoration: none;
    transition: all 0.3s;
    animation: waPop 3s ease-in-out infinite;
  }
  .wa-btn:hover { transform: scale(1.1); box-shadow: 0 6px 30px rgba(37,211,102,0.7); }
  @keyframes waPop {
    0%,100% { transform: scale(1); }
    50% { transform: scale(1.05); }
  }
  .wa-btn svg { width: 28px; height: 28px; fill: white; }

  /* ── ANIMATIONS ── */
  @keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  @keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
  }
  @keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
  }

  .reveal {
    opacity: 0; transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible { opacity: 1; transform: none; }

  /* ── MOBILE ── */
  @media (max-width: 900px) {
    nav { padding: 14px 20px; }
    .nav-links { display: none; }
    .hamburger { display: flex; }
    .nav-links.open {
      display: flex; flex-direction: column;
      position: fixed; inset: 0; top: 56px;
      padding: 48px 20px;
      align-items: center; gap: 28px;
      z-index: 999;
      border-top: 1px solid rgba(0,170,255,0.2);
      background: transparent;
    }
    .nav-links.open a { font-size: 1.2rem; z-index: 1; position: relative; }
    section { padding: 70px 20px; }
    .about-grid { grid-template-columns: 1fr; }
    .hex-grid { display: none; }
    .about-stats { grid-template-columns: 1fr 1fr; }
    .location-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .register-form-wrap { padding: 32px 20px; }
    footer { padding: 40px 20px 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .hero-btns { flex-direction: column; align-items: center; }
    .btn-primary, .btn-secondary { width: 100%; max-width: 300px; text-align: center; }
    #countdown { padding: 24px 12px; }
    .unit { width: clamp(58px, 20vw, 72px); padding: 8px 0; }
    .unit-sep { font-size: 1.1rem; }
  }