:root{
    --bg:#FFFFFF;
    --bg-alt:#F6F7F9;
    --surface:#FFFFFF;
    --surface-2:#F1F2F5;
    --line:#E6E8EC;
    --text:#15171C;
    --text-dim:#5B6472;
    --text-faint:#9AA3AF;
    --amber:#E3312B;
    --amber-dim:#C22521;
    --cyan:#F0A93B;
    --navy:#0B1524;
    --header-bg:rgba(255,255,255,0.88);
    --radius:10px;
  }
  html[data-theme="dark"]{
    --bg:#0B1524;
    --bg-alt:#0F1B2E;
    --surface:#121F33;
    --surface-2:#182842;
    --line:#233350;
    --text:#F3F5F8;
    --text-dim:#A9B4C4;
    --text-faint:#6B7A90;
    --amber:#FF5652;
    --amber-dim:#E3312B;
    --cyan:#F5B94D;
    --header-bg:rgba(11,21,36,0.86);
  }
  html, body{transition:background-color .25s ease, color .25s ease;}
  *{transition:background-color .2s ease, border-color .2s ease, color .2s ease;}
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    background:var(--bg);
    color:var(--text);
    font-family:'Inter',sans-serif;
    line-height:1.6;
    overflow-x:hidden;
  }
  h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;letter-spacing:-0.01em;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 24px;}
  .eyebrow{
    font-family:'Space Grotesk',sans-serif;
    font-size:17px;
    font-weight:700;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color:var(--amber);
    display:flex;align-items:center;gap:10px;
    margin-bottom:14px;
  }
  .eyebrow::before{content:"";width:22px;height:1.5px;background:var(--amber);display:inline-block;}
  .section{padding:110px 0;}
  .section-head{max-width:620px;margin-bottom:56px;}
  .section-head h2{font-size:clamp(28px,4vw,40px);font-weight:600;margin-bottom:14px;}
  .section-head p{color:var(--text-dim);font-size:16px;}
  .btn{
    display:inline-flex;align-items:center;gap:10px;
    padding:14px 26px;border-radius:6px;
    font-weight:600;font-size:14.5px;
    font-family:'Inter',sans-serif;
    cursor:pointer;border:1px solid transparent;
    transition:transform .15s ease, background .2s ease, border-color .2s ease;
  }
  .btn:hover{transform:translateY(-2px);}
  .btn-primary{background:var(--amber);color:#FFFFFF;}
  .btn-primary:hover{background:#F2453F;}
  .btn-outline{border-color:var(--line);color:var(--text);}
  .btn-outline:hover{border-color:var(--amber);color:var(--amber);}

  /* NAV */
  header{
    position:fixed;top:0;left:0;right:0;z-index:100;
    background:var(--header-bg);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px;}
  .logo{display:flex;align-items:center;gap:11px;font-family:'Space Grotesk',sans-serif;font-weight:700;}
  .logo .mark{
    width:40px;height:40px;border-radius:50%;flex-shrink:0;
    background:var(--surface-2);border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    font-family:'JetBrains Mono',monospace;font-size:9px;color:var(--text-faint);font-weight:500;
    overflow:hidden;text-align:center;line-height:1.15;
  }
  .logo .mark img{width:100%;height:100%;object-fit:cover;}
  .logo .txt{display:flex;flex-direction:column;line-height:1.15;}
  .logo .txt .l1{font-size:15.5px;font-weight:700;letter-spacing:.01em;}
  .logo .txt .l2{font-size:11px;font-weight:600;color:var(--amber);letter-spacing:.06em;}
  .nav-links{display:flex;gap:34px;align-items:center;}
  .nav-links a{font-size:14px;color:var(--text-dim);font-weight:500;transition:color .15s;}
  .nav-links a:hover{color:var(--amber);}
  .nav-links a.active{color:var(--amber);font-weight:700;}
  .nav-cta{display:flex;align-items:center;gap:14px;}
  .menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:22px;cursor:pointer;width:40px;height:40px;flex-shrink:0;}
  .theme-toggle{
    width:40px;height:40px;border-radius:8px;
    border:1px solid var(--line);background:var(--surface);
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;font-size:17px;color:var(--text);flex-shrink:0;
  }
  .theme-toggle:hover{border-color:var(--amber);}
  .theme-toggle .icon-moon{display:none;}
  html[data-theme="dark"] .theme-toggle .icon-sun{display:none;}
  html[data-theme="dark"] .theme-toggle .icon-moon{display:block;}

  /* HERO */
  .hero{
    position:relative;
    padding:190px 0 120px;
    overflow:hidden;
    background:
      radial-gradient(ellipse 900px 500px at 85% -10%, rgba(227,49,43,0.16), transparent 60%),
      radial-gradient(ellipse 700px 500px at 0% 20%, rgba(240,169,59,0.10), transparent 60%),
      var(--bg);
  }
  .hero-grid{
    position:absolute;inset:0;
    background-image:
      linear-gradient(var(--line) 1px, transparent 1px),
      linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size:64px 64px;
    opacity:0.5;
    mask-image:linear-gradient(to bottom, black, transparent 85%);
  }
  .hero-inner{position:relative;display:grid;grid-template-columns:1.15fr 0.85fr;gap:50px;align-items:center;}
  .hero-tag{
    display:inline-flex;align-items:center;gap:8px;
    font-family:'Inter',sans-serif;font-weight:600;font-size:12.5px;letter-spacing:0.06em;
    color:#FFFFFF;border:1px solid var(--amber);
    background:var(--amber);
    padding:8px 16px;border-radius:100px;margin-bottom:26px;
  }
  .hero-tag .dot{width:6px;height:6px;border-radius:50%;background:#FFFFFF;animation:pulse 1.6s infinite;}
  @keyframes pulse{0%,100%{opacity:1;}50%{opacity:0.25;}}
  .hero-tag-lg{
    font-size:16px;font-weight:700;padding:12px 22px;
    box-shadow:0 4px 18px rgba(227,49,43,0.45);
  }
  .hero-tag-lg .dot{width:8px;height:8px;}
  .hero h1{
    font-size:clamp(46px,7vw,84px);
    font-weight:700;
    line-height:0.98;
    text-transform:uppercase;
  }
  .hero h1 span{color:var(--amber);}
  .hero p.lead{font-size:18px;color:var(--text-dim);max-width:460px;margin:24px 0 34px;}
  .hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
  .hero-meta{display:flex;gap:28px;margin-top:44px;flex-wrap:wrap;}
  .hero-meta div{border-left:2px solid var(--line);padding-left:14px;}
  .hero-meta .k{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.08em;}
  .hero-meta .v{font-weight:600;font-size:15px;margin-top:3px;}

  .hero-panel{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:16px;
    padding:32px;
    position:relative;
  }
  .hero-panel::before{
    content:"";position:absolute;inset:-1px;border-radius:16px;
    padding:1px;background:linear-gradient(135deg,var(--amber),transparent 40%);
    -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
  }
  .hero-panel h3{font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--text-dim);margin-bottom:20px;font-family:'JetBrains Mono',monospace;font-weight:500;text-align:center;}
  .hero-logo-big{
    width:150px;height:150px;border-radius:50%;margin:0 auto 22px;
    background:radial-gradient(circle at 50% 40%, rgba(227,49,43,0.10), transparent 70%), var(--surface-2);
    border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-faint);text-align:center;
    overflow:hidden;
  }
  .hero-logo-big img{width:100%;height:100%;object-fit:contain;padding:18px;}
  .countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;}
  .countdown .cell{background:var(--bg-alt);border:1px solid var(--line);border-radius:8px;padding:16px 4px;text-align:center;}
  .countdown .num{font-family:'JetBrains Mono',monospace;font-size:30px;font-weight:700;color:var(--amber);}
  .countdown .lbl{font-size:10.5px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.08em;margin-top:4px;}
  .hero-panel .divider{height:1px;background:var(--line);margin:26px 0;}

  /* VIDEO SHOWCASE */
  .video-showcase{padding:100px 0;text-align:center;}
  .video-showcase .section-head{margin:0 auto 48px;text-align:center;}
  .video-showcase h2{font-size:clamp(28px,4vw,40px);font-weight:700;}
  .video-showcase h2 .accent{color:var(--amber);}
  .video-showcase > .wrap > p{color:var(--text-dim);font-size:16px;margin-top:10px;}
  .video-card{
    max-width:360px;margin:40px auto 0;
    background:var(--surface);border:1px solid var(--line);border-radius:16px;
    overflow:hidden;text-align:left;
  }
  .video-frame{
    position:relative;aspect-ratio:9/16;background:var(--surface-2);
    display:flex;align-items:center;justify-content:center;cursor:pointer;
  }
  .video-frame video, .video-frame .ph{width:100%;height:100%;object-fit:cover;border:none;border-radius:0;}
  .video-frame video:fullscreen{width:100%;height:100%;object-fit:contain;background:#000;}
  .video-frame video:-webkit-full-screen{width:100%;height:100%;object-fit:contain;background:#000;}
  .video-frame video:-moz-full-screen{width:100%;height:100%;object-fit:contain;background:#000;}
  .video-badges{
    position:absolute;top:16px;left:50%;transform:translateX(-50%);
    background:rgba(255,255,255,0.9);border-radius:8px;padding:8px 14px;
    display:flex;gap:10px;align-items:center;
  }
  .video-badges span{font-size:11px;font-weight:700;color:var(--navy);}
  .video-play{
    position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
    width:64px;height:64px;border-radius:50%;background:var(--amber);
    display:flex;align-items:center;justify-content:center;
    color:#FFFFFF;font-size:24px;border:none;cursor:pointer;
    box-shadow:0 6px 20px rgba(227,49,43,0.35);
  }
  .video-info{padding:20px;}
  .video-info h3{font-size:17px;margin-bottom:6px;}
  .video-info p{color:var(--text-dim);font-size:14px;margin-bottom:16px;}
  .video-info .actions{display:flex;align-items:center;gap:16px;}
  .video-info .btn{padding:9px 18px;font-size:13.5px;}
  .video-info .audio-note{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-dim);}
  .fee-row{display:flex;justify-content:space-between;align-items:baseline;}
  .fee-row .amt{font-family:'JetBrains Mono',monospace;font-size:26px;font-weight:700;color:var(--cyan);}

  /* IMAGE PLACEHOLDER */
  .ph{
    background:var(--surface-2);
    display:flex;align-items:center;justify-content:center;
    overflow:hidden;
  }
  .ph img{width:100%;height:100%;object-fit:cover;display:block;}

  /* CATEGORIES */
  .cat-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:22px;}
  .cat-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;transition:border-color .2s ease, transform .2s ease;
    display:block;
    flex:0 1 calc(33.333% - 14.667px);
  }
  .cat-card:hover{border-color:var(--amber);transform:translateY(-4px);}
  .cat-card .ph{height:170px;}
  .cat-body{padding:22px;}
  .cat-body .num{font-family:'JetBrains Mono',monospace;color:var(--amber);font-size:12px;letter-spacing:.08em;}
  .cat-body h3{font-size:19px;margin:8px 0 8px;}
  .cat-body p{color:var(--text-dim);font-size:14px;margin-bottom:16px;}
  .cat-body .link{font-size:13.5px;font-weight:600;color:var(--amber);display:inline-flex;align-items:center;gap:6px;}

  /* PRIZES */
  .prize-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-bottom:22px;}
  .prize-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
    padding:30px;position:relative;
  }
  .prize-card .place{font-family:'JetBrains Mono',monospace;font-size:34px;color:var(--amber);font-weight:700;}
  .prize-card h4{font-size:16px;margin:10px 0 6px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;}
  .prize-card .amount{font-size:32px;font-weight:700;font-family:'Space Grotesk',sans-serif;}
  .fee-card{
    background:linear-gradient(135deg, rgba(227,49,43,0.08), rgba(240,169,59,0.05));
    border:1px solid var(--line);border-radius:var(--radius);padding:34px;
    display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;
  }
  .fee-card .amount{font-size:40px;font-weight:700;color:var(--amber);font-family:'Space Grotesk',sans-serif;}
  .fee-list{list-style:none;color:var(--text-dim);font-size:14px;display:flex;flex-direction:column;gap:6px;}

  .warn-box{
    display:flex;gap:18px;align-items:flex-start;
    background:var(--surface);border:1px solid rgba(240,169,59,0.45);
    border-radius:14px;padding:26px 28px;margin-bottom:40px;
  }
  .warn-box .warn-ic{
    width:38px;height:38px;border-radius:50%;background:var(--cyan);color:#FFFFFF;
    display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;
  }
  .warn-box h4{font-size:17px;display:flex;align-items:center;gap:8px;margin-bottom:10px;}
  .warn-box p{font-size:14.5px;color:var(--text-dim);line-height:1.6;margin-bottom:12px;}
  .warn-box strong.hl-gold{color:var(--cyan);}
  .warn-box strong.hl-red{color:var(--amber);}
  .warn-box ul{list-style:none;color:var(--text-dim);font-size:13.5px;display:flex;flex-direction:column;gap:4px;}
  .warn-box ul li::before{content:"• ";color:var(--text-faint);}
  .fee-list li::before{content:"— ";color:var(--cyan);}

  /* GALLERY */
    /* CAROUSEL */
  .carousel{position:relative;}
  .carousel-main{
    position:relative;border-radius:14px;overflow:hidden;
    aspect-ratio:16/8;background:var(--surface-2);
  }
  .carousel-track{display:flex;height:100%;transition:transform .45s cubic-bezier(.4,0,.2,1);}
  .carousel-slide{flex:0 0 100%;height:100%;position:relative;}
  .carousel-slide .ph{width:100%;height:100%;border:none;border-radius:0;}
  .carousel-caption{
    position:absolute;left:0;right:0;bottom:0;padding:26px 30px;
    background:linear-gradient(to top, rgba(6,10,8,0.88), transparent);
  }
  .carousel-caption .idx{
    display:inline-block;
    font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:13px;
    color:#FFFFFF;background:var(--amber);
    letter-spacing:.02em;padding:6px 14px;border-radius:8px;
    margin-bottom:10px;box-shadow:0 4px 12px rgba(0,0,0,0.35);
  }
  .carousel-caption h3{font-size:22px;color:#fff;margin-bottom:4px;}
  .carousel-caption p{color:rgba(255,255,255,0.78);font-size:14px;max-width:480px;}
  .carousel-nav{
    position:absolute;top:50%;transform:translateY(-50%);
    width:42px;height:42px;border-radius:50%;
    background:rgba(10,14,11,0.55);border:1px solid rgba(255,255,255,0.25);
    color:#fff;font-size:18px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    backdrop-filter:blur(3px);
  }
  .carousel-nav:hover{background:var(--amber);color:#1A1400;border-color:var(--amber);}
  .carousel-prev{left:16px;}
  .carousel-next{right:16px;}
  .carousel-thumbs{display:flex;gap:10px;margin-top:14px;overflow-x:auto;padding-bottom:4px;}
  .carousel-thumbs .ph{
    flex:0 0 96px;height:64px;border-radius:6px;cursor:pointer;
    opacity:0.5;border:2px solid transparent;font-size:10px;
  }
  .carousel-thumbs .ph.active{opacity:1;border-color:var(--amber);}

  /* LOCATION */
  .loc-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;}
  .map-frame{
    height:360px;border-radius:12px;overflow:hidden;
    border:1px solid var(--line);
  }
  .map-frame iframe{width:100%;height:100%;border:0;filter:saturate(0.9);}
  .loc-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);}
  .loc-item .ic{
    width:38px;height:38px;border-radius:8px;background:var(--surface-2);
    display:flex;align-items:center;justify-content:center;color:var(--cyan);
    font-family:'JetBrains Mono',monospace;font-weight:700;flex-shrink:0;
  }
  .loc-item h4{font-size:15px;margin-bottom:4px;}
  .loc-item p{color:var(--text-dim);font-size:14px;}

  /* SCHEDULE */
  .timeline{border-left:1px solid var(--line);padding-left:34px;display:flex;flex-direction:column;gap:0;}
  .t-item{position:relative;padding-bottom:36px;}
  .t-item:last-child{padding-bottom:0;}
  .t-item::before{
    content:"";position:absolute;left:-40px;top:2px;width:11px;height:11px;
    border-radius:50%;background:var(--bg);border:2px solid var(--amber);
  }
  .t-time{font-family:'JetBrains Mono',monospace;color:var(--amber);font-size:13px;margin-bottom:6px;}
  .t-item h4{font-size:16.5px;margin-bottom:4px;}
  .t-item p{color:var(--text-dim);font-size:14px;}

  /* ORGANIZERS */
  .org-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:20px;}
  .org-card{text-align:center;display:block;border-radius:10px;padding:14px 10px;border:1px solid transparent;flex:0 0 calc(25% - 15px);}
  .org-card:hover{border-color:var(--amber);background:var(--surface);transform:translateY(-3px);}
  .org-card .ph{aspect-ratio:1;border-radius:50%;margin:0 auto 14px;overflow:hidden;}
  .org-card .ph img{object-fit:contain;padding:8px;}
  /* Los logos de instituciones/patrocinadores suelen tener fondo transparente;
     forzamos fondo blanco fijo (no ligado al tema) para que no se vean oscuros
     ni ilegibles cuando el tema oscuro invierte --surface-2. */
  .logo-grid .org-card .ph{background:#FFFFFF;border:1px solid var(--line);}
  .team-grid .org-card .ph img{object-fit:cover;padding:0;}
  .org-card h4{font-size:14.5px;display:flex;align-items:center;justify-content:center;gap:6px;}
  .org-card h4 .ext{font-size:11px;color:var(--cyan);}
  .org-card p{font-size:12.5px;color:var(--text-faint);margin-top:2px;}

  /* CONTACT */
  .contact-box{
    background:var(--surface);border:1px solid var(--line);border-radius:16px;
    padding:56px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px;
  }
  .contact-box h2{font-size:30px;margin-bottom:10px;}
  .contact-box p{color:var(--text-dim);}
  .contact-actions{display:flex;flex-wrap:wrap;gap:12px;}

  footer{border-top:1px solid var(--line);padding:60px 0 30px;background:var(--navy);}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:50px;}
  .foot-grid h5{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,0.42);margin-bottom:16px;}
  .foot-grid ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
  .foot-grid a{color:rgba(255,255,255,0.72);font-size:14px;}
  .foot-grid a:hover{color:var(--amber);}
  .foot-bottom{border-top:1px solid rgba(255,255,255,0.12);padding-top:24px;display:flex;justify-content:space-between;color:rgba(255,255,255,0.42);font-size:13px;flex-wrap:wrap;gap:10px;}
  footer .logo, footer .logo p{color:#FFFFFF;}

  /* PDF MODAL */
  .cat-body .link{background:none;border:none;cursor:pointer;font-family:'Inter',sans-serif;padding:0;}
  .modal-overlay{
    display:none;position:fixed;inset:0;z-index:200;
    background:rgba(6,8,11,0.78);
    backdrop-filter:blur(4px);
    align-items:center;justify-content:center;
    padding:24px;
  }
  .modal-overlay.open{display:flex;}
  .modal-box{
    width:100%;max-width:900px;height:88vh;
    background:var(--surface);border:1px solid var(--line);border-radius:12px;
    display:flex;flex-direction:column;overflow:hidden;
  }
  .modal-head{
    display:flex;align-items:center;justify-content:space-between;
    padding:16px 22px;border-bottom:1px solid var(--line);flex-shrink:0;
  }
  .modal-head h3{font-size:16px;font-family:'Space Grotesk',sans-serif;}
  .modal-head .actions{display:flex;align-items:center;gap:10px;}
  .modal-head a{
    font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--amber);
    border:1px solid var(--amber);padding:6px 12px;border-radius:6px;
  }
  .modal-close{
    width:32px;height:32px;border-radius:6px;border:1px solid var(--line);
    background:var(--surface-2);color:var(--text);font-size:16px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;line-height:1;
  }
  .modal-close:hover{border-color:var(--amber);color:var(--amber);}
  .modal-body{flex:1;background:#2A2A2A;}
  .lightbox-overlay{padding:40px;}
  .lightbox-frame{
    position:relative;display:inline-block;max-width:100%;max-height:100%;
    border-radius:10px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,0.5);
  }
  .lightbox-frame img{display:block;max-width:92vw;max-height:80vh;object-fit:contain;}
  .lightbox-close{
    position:absolute;top:20px;right:20px;
    background:rgba(10,14,11,0.6);border-color:rgba(255,255,255,0.25);color:#fff;
  }
  .lightbox-close:hover{border-color:var(--amber);color:var(--amber);}
  .modal-body iframe{width:100%;height:100%;border:none;}
  #inscripcionModal .modal-box{height:auto;max-height:88vh;}
  .modal-body-text{
    background:var(--surface);color:var(--text-dim);
    padding:24px 26px 28px;overflow-y:auto;
    font-family:'Inter',sans-serif;font-size:14.5px;line-height:1.65;
  }
  .modal-body-text > p{margin-bottom:16px;color:var(--text);}
  .modal-body-text ol{padding-left:20px;display:flex;flex-direction:column;gap:14px;}
  .modal-body-text ol li{padding-left:4px;}
  .modal-body-text strong{color:var(--text);}
  .modal-body-text a{color:var(--cyan);}
  .modal-body-text .modal-cta a.btn-primary{color:#FFFFFF;}
  .modal-cta{margin-top:26px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:center;}

  @media(max-width:1024px){
    .cat-card{flex-basis:calc(50% - 11px);}
    .org-card{flex-basis:calc(33.333% - 13.333px);}
    .hero h1{font-size:clamp(40px,8vw,64px);}
  }

  @media(max-width:880px){
    .nav-links{
      display:flex;flex-direction:column;align-items:flex-start;gap:0;
      position:absolute;top:74px;left:0;right:0;
      background:var(--surface);border-bottom:1px solid var(--line);
      max-height:0;overflow:hidden;padding:0 24px;
      transition:max-height .25s ease, padding .25s ease;
    }
    .nav-links.open{max-height:400px;padding:14px 24px 20px;}
    .nav-links a{width:100%;padding:12px 0;border-bottom:1px solid var(--line);}
    .nav-links a:last-child{border-bottom:none;}
    .menu-toggle{display:block;}
    .hero{padding:150px 0 80px;}
    .hero-inner{grid-template-columns:1fr;}
    .hero-actions .btn{flex:1;justify-content:center;}
    .cat-card{flex-basis:calc(50% - 11px);}
    .prize-grid{grid-template-columns:1fr;}
    .warn-box{flex-direction:column;padding:20px;}
    .loc-grid{grid-template-columns:1fr;}
    .map-frame{height:280px;}
    .carousel-main{aspect-ratio:4/3;}
    .carousel-caption h3{font-size:18px;}
    .carousel-caption p{font-size:13px;}
    .carousel-nav{width:36px;height:36px;font-size:16px;}
    .org-grid{grid-template-columns:1fr 1fr;}
    .contact-box{grid-template-columns:1fr;text-align:center;}
    .section{padding:70px 0;}
    .video-showcase{padding:60px 0;}
    .section-head{margin-bottom:36px;}
  }

  @media(max-width:640px){
    .wrap{padding:0 18px;}
    .hero-tag{font-size:11px;}
    .hero-tag-lg{font-size:13px;padding:10px 18px;}
    .hero p.lead{font-size:16px;}
    .hero-meta{gap:18px;}
    .countdown .num{font-size:22px;}
    .cat-card{flex-basis:100%;}
    .org-grid{gap:14px;}
    .org-card{flex-basis:calc(50% - 7px);}
    .contact-box{padding:34px 22px;}
    .contact-box h2{font-size:24px;}
    .contact-actions{flex-direction:column;}
    .contact-actions .btn{justify-content:center;}
    .modal-box{height:82vh;}
    .modal-head h3{font-size:14px;}
    .modal-head a{display:none;}
    .foot-grid{grid-template-columns:1fr;gap:30px;}
    .foot-bottom{flex-direction:column;text-align:center;}
  }

  @media(max-width:420px){
    .org-card{flex-basis:100%;}
    .prize-card .amount{font-size:26px;}
    .fee-card .amount{font-size:32px;}
  }