:root{
      --blue:#355db2;
      --blue-dark:#24448c;
      --blue-soft:#eef3ff;
      --yellow:#f5b51b;
      --yellow-soft:#fff7d8;
      --ink:#182033;
      --muted:#68738a;
      --line:#dfe5ef;
      --surface:#ffffff;
      --surface-2:#f7f9fc;
      --success:#16774a;
      --danger:#a43a3a;
      --shadow:0 18px 55px rgba(31,54,107,.10);
      --radius:24px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 8% 5%, rgba(53,93,178,.08), transparent 22%),
        radial-gradient(circle at 93% 11%, rgba(245,181,27,.10), transparent 20%),
        var(--surface-2);
      line-height:1.6;
    }
    a{color:inherit;text-decoration:none}
    button{font:inherit}
    .container{width:min(1120px, calc(100% - 36px));margin:auto}

    /* Header */
    .topbar{
      position:sticky;top:0;z-index:30;
      backdrop-filter:blur(16px);
      background:rgba(247,249,252,.85);
      border-bottom:1px solid rgba(223,229,239,.9);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;
      min-height:72px;gap:20px;
    }
    .brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:-.03em}
    .brand-mark{
      width:42px;height:42px;border-radius:13px;
      display:grid;place-items:center;color:#fff;
      background:linear-gradient(135deg,var(--blue),#6e91df);
      box-shadow:0 8px 24px rgba(53,93,178,.22);
      font-size:20px;
    }
    .brand-text span{display:block}
    .brand-text small{color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
    .navlinks{display:flex;gap:18px;align-items:center}
    .navlinks a{font-weight:700;color:#4f5a70;font-size:14px}
    .navlinks a:hover{color:var(--blue)}
    .menu-btn{display:none;border:0;background:transparent;font-size:28px}

    /* Hero */
    .hero{padding:68px 0 40px}
    .hero-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:28px;align-items:stretch}
    .hero-main{
      position:relative;overflow:hidden;
      padding:48px;border-radius:34px;color:#fff;
      background:
        linear-gradient(135deg, rgba(31,67,147,.96), rgba(73,112,199,.95)),
        var(--blue);
      box-shadow:var(--shadow);
    }
    .hero-main::after{
      content:"";position:absolute;width:260px;height:260px;border-radius:50%;
      right:-95px;bottom:-120px;background:rgba(255,255,255,.10);
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 11px;border-radius:999px;
      background:rgba(255,255,255,.14);
      font-weight:800;font-size:12px;letter-spacing:.08em;text-transform:uppercase
    }
    h1{font-size:clamp(40px,7vw,72px);line-height:.98;letter-spacing:-.05em;margin:18px 0}
    .hero-main p{max-width:680px;color:rgba(255,255,255,.88);font-size:17px;margin:0}
    .pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}
    .pill{padding:9px 12px;border-radius:999px;background:#fff;color:var(--blue-dark);font-weight:900;font-size:13px}
    .hero-side{
      display:flex;flex-direction:column;gap:16px
    }
    .count-card,.prize-card{
      border:1px solid var(--line);background:#fff;border-radius:28px;padding:24px;box-shadow:var(--shadow)
    }
    .label{font-size:11px;font-weight:900;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
    .deadline{font-size:26px;font-weight:950;letter-spacing:-.03em;margin-top:5px}
    .countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}
    .timebox{border:1px solid var(--line);border-radius:16px;background:var(--surface-2);padding:12px 7px;text-align:center}
    .timebox strong{display:block;font-size:25px;line-height:1;font-variant-numeric:tabular-nums}
    .timebox span{display:block;margin-top:5px;color:var(--muted);font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.06em}
    .prize-big{font-size:35px;font-weight:950;letter-spacing:-.04em;color:var(--blue);margin-top:3px}
    .prize-card p{color:var(--muted);font-size:13px;margin:5px 0 0}

    /* Section */
    section{padding:54px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}
    .section-head h2{font-size:clamp(28px,4vw,42px);line-height:1.05;letter-spacing:-.04em;margin:0}
    .section-head p{max-width:560px;color:var(--muted);margin:0}
    .kicker{color:var(--blue);font-weight:950;font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px}

    /* Quick facts */
    .facts{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .fact{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}
    .fact-icon{font-size:24px}
    .fact strong{display:block;font-size:17px;margin-top:7px}
    .fact span{display:block;color:var(--muted);font-size:13px;margin-top:2px}

    /* Rules */
    .rules-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:22px}
    .rules-intro,.rule-card,.video-card,.submit-card,.quest-card,.timeline-card,.faq-item{
      background:#fff;border:1px solid var(--line);border-radius:24px
    }
    .rules-intro{padding:27px;background:linear-gradient(180deg,#fff,#f6f8fd)}
    .rules-intro h3{font-size:27px;line-height:1.15;margin:0 0 10px}
    .rules-intro p{color:var(--muted);margin:0 0 18px}
    .notice{
      display:flex;gap:11px;align-items:flex-start;
      padding:14px;border-radius:16px;background:var(--yellow-soft);border:1px solid #f4df86;
      color:#654f00;font-size:13px;font-weight:700
    }
    .rule-list{display:grid;gap:11px}
    .rule-card{padding:18px 20px;display:grid;grid-template-columns:38px 1fr;gap:14px}
    .num{
      width:38px;height:38px;border-radius:13px;background:var(--blue-soft);color:var(--blue);
      display:grid;place-items:center;font-weight:950
    }
    .rule-card strong{font-size:16px}
    .rule-card p{margin:4px 0 0;color:var(--muted);font-size:13px}

    /* Table */
    .table-wrap{background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden}
    table{width:100%;border-collapse:collapse}
    th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:var(--blue);color:#fff;font-size:13px}
    td{font-size:13px}
    tbody tr:last-child td{border-bottom:0}
    td strong{font-size:13px}

    /* Video */
    .video-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .video-card{padding:24px}
    .video-card h3{margin:0 0 7px;font-size:23px}
    .video-card p{margin:0;color:var(--muted);font-size:13px}
    .video-checks{margin:18px 0 0;display:grid;gap:10px}
    .check{display:flex;align-items:flex-start;gap:10px;font-size:14px}
    .check b{
      width:23px;height:23px;border-radius:8px;display:grid;place-items:center;flex:none;
      background:#e9f7ef;color:var(--success);font-size:12px
    }
    .duration{
      margin-top:16px;padding:12px 14px;border-radius:15px;background:var(--blue-soft);color:var(--blue-dark);
      font-weight:900;font-size:13px
    }

    /* Quest */
    .quest-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .quest-card{padding:21px}
    .quest-card:nth-child(1){background:#f2f7ff}
    .quest-card:nth-child(2){background:#f4fbf4}
    .quest-card:nth-child(3){background:#fff8e7}
    .quest-tag{font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
    .quest-card h3{margin:7px 0 5px;font-size:21px}
    .quest-card p{margin:0;color:var(--muted);font-size:13px}
    .important{margin-top:15px;color:#5d4b07;font-size:12px;font-weight:900}

    /* Timeline */
    .timeline{display:grid;gap:12px}
    .timeline-card{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:18px 20px}
    .date{font-weight:950;color:var(--blue)}
    .timeline-card h3{margin:0;font-size:17px}
    .timeline-card p{margin:3px 0 0;color:var(--muted);font-size:13px}

    /* Checklist */
    .submit-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .submit-card{padding:25px}
    .submit-card h3{margin:0 0 10px;font-size:22px}
    .submit-card ul{margin:0;padding-left:19px}
    .submit-card li{margin:8px 0;color:#475166;font-size:13px}
    .submit-card li::marker{color:var(--blue)}
    .status{
      margin-top:17px;padding:13px 14px;background:#f4fbf6;border:1px solid #c9ead5;border-radius:15px;
      color:var(--success);font-size:13px;font-weight:900
    }

    /* FAQ */
    .faq{display:grid;gap:10px}
    .faq-item{overflow:hidden}
    .faq-btn{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
      padding:18px 20px;border:0;background:#fff;text-align:left;cursor:pointer;font-weight:900;color:var(--ink)
    }
    .faq-btn span:last-child{font-size:22px;color:var(--blue)}
    .faq-answer{display:none;padding:0 20px 18px;color:var(--muted);font-size:13px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-btn span:last-child{transform:rotate(45deg)}

    /* CTA */
    .cta{
      margin:10px 0 56px;padding:35px 40px;border-radius:30px;color:#fff;
      background:linear-gradient(135deg,#243f83,#5475c8);
      display:flex;justify-content:space-between;align-items:center;gap:25px;
      box-shadow:var(--shadow)
    }
    .cta h2{margin:0;font-size:31px;letter-spacing:-.04em}
    .cta p{margin:6px 0 0;color:rgba(255,255,255,.82);font-size:14px}
    .cta a{
      display:inline-flex;align-items:center;justify-content:center;
      padding:13px 18px;border-radius:14px;background:#fff;color:var(--blue-dark);font-weight:950;white-space:nowrap
    }

    footer{padding:35px 0 48px;color:var(--muted);font-size:12px;text-align:center}

    /* Responsive */
    @media (max-width: 900px){
      .hero-grid,.rules-wrap,.video-grid,.submit-grid{grid-template-columns:1fr}
      .facts{grid-template-columns:repeat(2,1fr)}
      .quest-grid{grid-template-columns:1fr}
      .navlinks{display:none}
      .menu-btn{display:block}
      .navlinks.open{
        display:flex;position:absolute;left:18px;right:18px;top:65px;
        flex-direction:column;align-items:flex-start;padding:14px 16px;
        border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)
      }
    }
    @media (max-width: 620px){
      .container{width:min(100% - 24px,1120px)}
      .hero{padding-top:34px}
      .hero-main{padding:30px 24px}
      .hero-side .count-card,.hero-side .prize-card{padding:20px}
      section{padding:40px 0}
      .facts{grid-template-columns:1fr}
      .timeline-card{grid-template-columns:1fr;gap:4px}
      .cta{padding:27px 22px;align-items:flex-start;flex-direction:column}
      .cta h2{font-size:26px}
      table{min-width:720px}
      .table-wrap{overflow-x:auto}
    }