/* Hackathon Uji AI — tema biru tua & emas (pola tema jurnal Sah) */
:root{
  --navy:#0a2f6b; --navy-deep:#06264d; --navy-dark:#041a3d;
  --gold:#e9a912; --gold-dark:#b57f06; --gold-soft:#f5c542;
  --sky:#7fb0e6; --sky-soft:#e8f1fc; --sky-line:#bcd6f5;
  --yellow:#ffd94d; --yellow-soft:#fff6d8;
  --ink:#1d2b3a; --dim:#5a6b7d; --line:#dbe4ee;
  --bg:#f2f6fb; --card:#ffffff;
  --ok:#177245; --err:#b3261e;
  --radius:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
h1,h2,h3{color:var(--navy-deep);line-height:1.25;margin:0 0 .5em}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit;width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--sky);border-color:var(--sky)}
label{display:block;font-weight:600;margin:14px 0 6px;color:var(--navy-deep)}
small{color:var(--dim)}

/* strip utilitas */
.util-strip{background:var(--navy-dark);color:#cfe1f7;font-size:.85rem}
.util-inner{display:flex;justify-content:space-between;align-items:center;padding-top:6px;padding-bottom:6px}
.util-strip a{color:var(--gold-soft);font-weight:600}
.util-strip .sep{margin:0 8px;color:#5b7ba6}

/* header utama */
.topbar{background:linear-gradient(180deg,var(--navy) 0%,var(--navy-deep) 100%);border-bottom:4px solid var(--gold);position:sticky;top:0;z-index:50;box-shadow:0 2px 10px rgba(4,26,61,.25)}
.topbar-inner{display:flex;align-items:center;gap:18px;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:12px;color:#fff;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-name{display:block;font-size:1.42rem;font-weight:800;letter-spacing:.2px;color:#fff}
.brand-name em{font-style:normal;color:var(--gold)}
.brand-tag{display:block;font-size:.8rem;color:var(--sky);letter-spacing:.4px}
.burger{display:none;margin-left:auto;background:var(--navy-deep);border:1px solid #2c5596;color:#fff;border-radius:8px;width:44px;height:44px;font-size:1.2rem}
.mainnav{margin-left:auto;display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.mainnav a{color:#eaf2fd;font-weight:600;padding:9px 13px;border-radius:8px;white-space:nowrap}
.mainnav a:hover{background:rgba(255,255,255,.12);text-decoration:none}
.mainnav a.btn-gold{background:var(--gold);color:var(--navy-dark)}
.mainnav a.btn-gold:hover{background:var(--gold-soft)}

/* hero */
.hero{background:linear-gradient(135deg,var(--navy-dark) 0%,var(--navy) 55%,#0d3f8a 100%);color:#fff;border-radius:0 0 22px 22px;margin:0 -20px;padding:52px 40px 46px;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;right:-70px;top:-70px;width:320px;height:320px;border-radius:50%;border:56px solid rgba(233,169,18,.16)}
.hero:after{content:"";position:absolute;right:120px;bottom:-130px;width:220px;height:220px;border-radius:50%;border:38px solid rgba(127,176,230,.16)}
.hero h1{color:#fff;font-size:2.35rem;max-width:640px;position:relative;z-index:1}
.hero h1 span{color:var(--gold)}
.hero p{color:#d6e5f8;max-width:600px;font-size:1.06rem;position:relative;z-index:1}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;position:relative;z-index:1}
.btn{display:inline-block;border:0;border-radius:9px;padding:11px 20px;font-weight:700;background:var(--navy);color:#fff;text-align:center}
.btn:hover{text-decoration:none;background:var(--navy-deep)}
.btn-gold{background:var(--gold);color:var(--navy-dark)}
.btn-gold:hover{background:var(--gold-soft)}
.btn-ghost{background:transparent;border:1.5px solid var(--navy);color:var(--navy)}
.btn-ghost:hover{background:var(--sky-soft)}
.btn-light{background:#fff;color:var(--navy)}
.btn-sm{padding:7px 13px;font-size:.9rem}
.btn[disabled]{opacity:.55;cursor:not-allowed}

/* statistik */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:26px 0}
.stat{background:var(--card);border:1px solid var(--line);border-top:4px solid var(--gold);border-radius:var(--radius);padding:18px 20px;text-align:center}
.stat b{display:block;font-size:1.9rem;color:var(--navy)}
.stat span{color:var(--dim);font-size:.92rem}

/* kartu hackathon */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:18px;margin:18px 0 30px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 3px rgba(6,38,77,.05)}
.card h3{margin-bottom:4px}
.card .tagline{color:var(--dim);margin:0 0 12px}
.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:700;letter-spacing:.3px}
.badge-open{background:#e2f4e8;color:var(--ok)}
.badge-closed{background:#fbe7e5;color:var(--err)}
.badge-draft{background:var(--yellow-soft);color:#8a6d00}
.badge-metric{background:var(--sky-soft);color:var(--navy)}
.meta-row{display:flex;gap:14px;flex-wrap:wrap;color:var(--dim);font-size:.9rem;margin:10px 0}
.card .actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}

/* langkah */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin:16px 0 34px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.step .num{width:38px;height:38px;border-radius:50%;background:var(--navy);color:var(--gold);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:1.05rem;margin-bottom:10px}
.step h3{font-size:1.02rem;margin-bottom:4px}
.step p{color:var(--dim);margin:0;font-size:.94rem}

/* halaman detail */
.detail-head{background:var(--card);border:1px solid var(--line);border-top:5px solid var(--navy);border-radius:var(--radius);padding:26px;margin:24px 0 18px}
.detail-head h1{margin-bottom:2px}
.cols{display:grid;grid-template-columns:1fr 340px;gap:18px;align-items:start;margin-bottom:34px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:18px}
.panel h2{font-size:1.18rem;border-bottom:2px solid var(--sky-line);padding-bottom:8px}
.panel.gold{border-top:5px solid var(--gold)}
.rules-text{white-space:pre-wrap}
.dl-row{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
.dl-row:last-child{border-bottom:0}
input[type=file]{padding:8px;background:var(--sky-soft)}

/* tabel leaderboard */
table{width:100%;border-collapse:collapse;font-size:.95rem}
th{background:var(--navy);color:#fff;text-align:left;padding:10px 12px}
th:first-child{border-radius:8px 0 0 0}
th:last-child{border-radius:0 8px 0 0}
td{padding:9px 12px;border-bottom:1px solid var(--line)}
tr.me td{background:var(--yellow-soft);font-weight:600}
.rank-1 td{background:linear-gradient(90deg,#fff3c4,#fffdf4);font-weight:700}
.rank-medal{display:inline-flex;width:26px;height:26px;border-radius:50%;align-items:center;justify-content:center;font-weight:800;background:var(--sky-soft);color:var(--navy)}
.rank-1 .rank-medal{background:var(--gold);color:var(--navy-dark)}
.score{font-variant-numeric:tabular-nums;font-weight:700;color:var(--navy)}

/* formulir & auth */
.auth-box{max-width:440px;margin:38px auto;background:var(--card);border:1px solid var(--line);border-top:5px solid var(--gold);border-radius:var(--radius);padding:28px}
.auth-box h1{font-size:1.4rem}
.form-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:24px 0}
.form-box .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.checkline{display:flex;gap:8px;align-items:center;margin-top:12px}
.checkline input{width:auto}
.alert{border-radius:9px;padding:12px 16px;margin:14px 0}
.alert-ok{background:#e2f4e8;color:#0d4d29;border:1px solid #a9d8ba}
.alert-err{background:#fbe7e5;color:#7a1710;border:1px solid #f0b8b2}
.alert-info{background:var(--sky-soft);color:var(--navy-deep);border:1px solid var(--sky-line)}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:var(--navy-dark);color:#fff;padding:12px 20px;border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.3);z-index:200;max-width:90vw}
.section-title{margin:30px 0 4px;font-size:1.35rem}
.section-sub{color:var(--dim);margin:0 0 8px}
.empty{color:var(--dim);text-align:center;padding:28px;border:1.5px dashed var(--sky-line);border-radius:var(--radius);background:#fbfdff}
.kv{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--line);font-size:.94rem}
.kv:last-child{border-bottom:0}
.kv b{color:var(--navy-deep)}

/* footer */
.footer{background:var(--navy-dark);color:#cfe1f7;margin-top:44px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:26px;padding:34px 20px}
.footer-brand{font-size:1.2rem;font-weight:800;color:#fff;margin-bottom:8px}
.footer p{color:#9db9dd;font-size:.93rem;margin:0}
.footer-head{color:var(--gold);font-weight:700;margin-bottom:10px}
.footer a{display:block;color:#cfe1f7;padding:3px 0;font-size:.94rem}
.footer-bottom{border-top:1px solid #123c73;padding:13px 0;font-size:.85rem;color:#8fa9cc}

@media (max-width:900px){
  .cols{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
}
@media (max-width:760px){
  .burger{display:block}
  .mainnav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--navy-deep);flex-direction:column;align-items:stretch;padding:10px 16px 16px;border-bottom:4px solid var(--gold)}
  .mainnav.open{display:flex}
  .mainnav a{padding:11px 10px}
  .hero{padding:36px 22px 32px}
  .hero h1{font-size:1.7rem}
  .stats{grid-template-columns:1fr}
  .util-left{display:none}
  .util-inner{justify-content:flex-end}
  .form-box .row2{grid-template-columns:1fr}
}