/* CYBER FRONTIER 2026 — tema selaras sibersentinel.asia.
   Dark navy (#040812 / #050b22 / #0a1526), aksen utama mint #00ffcc,
   aksen sekunder #9fc2ff / #4a6a9c. Teks terang, scoreboard tetap nyaman dibaca. */
:root {
  --bg: #040812;
  --bg2: #050b22;
  --panel: #0a1526;
  --panel2: #0d1c33;
  --border: #1b2c4e;
  --text: #e9f0ff;
  --muted: #9fc2ff;
  --muted-dim: #6f87b3;
  --mint: #00ffcc;
  --mint-bg: rgba(0, 255, 204, .10);
  --mint-border: rgba(0, 255, 204, .35);
  --blue: #4a6a9c;
  --blue-lt: #9fc2ff;
  --navy: #0a1526;
  --green: #3fb950;
  --green-bg: rgba(63, 185, 80, .13);
  --red: #f85149;
  --red-bg: rgba(248, 81, 73, .13);
  --amber: #d29922;
  --amber-bg: rgba(210, 153, 34, .13);
  --purple: #a371f7;
  --gold: #f5b301;
  --silver: #9aa7bd;
  --bronze: #c47b2b;
  --shadow: 0 2px 14px rgba(0, 0, 0, .45);
}
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 420px at 12% -4%, rgba(0, 255, 204, .07), transparent 60%),
    radial-gradient(800px 420px at 88% -6%, rgba(74, 106, 156, .16), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 140 140'%3E%3Cg fill='none' stroke='%2300ffcc' stroke-opacity='0.05' stroke-width='1.5'%3E%3Cpath d='M10 10h40v30h30M130 130h-40v-30h-30M10 130v-40h30M130 10v40h-30'/%3E%3Ccircle cx='80' cy='40' r='3'/%3E%3Ccircle cx='60' cy='100' r='3'/%3E%3Ccircle cx='10' cy='10' r='2.5'/%3E%3Ccircle cx='130' cy='130' r='2.5'/%3E%3C/g%3E%3C/svg%3E");
}
a { color: var(--mint); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Sidebar (panel samping kiri, seperti demo panitia) ---- */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: 240px;
  background: #040812; border-right: 1px solid var(--border);
  z-index: 100; display: flex; flex-direction: column;
  padding: 1em .9em; overflow-y: auto;
  box-shadow: 2px 0 14px rgba(0, 0, 0, .5);
}
.sidebar::after {
  content: ""; position: absolute; top: 0; right: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, transparent, var(--mint), var(--blue-lt), transparent);
  opacity: .6;
}
.sidebar .brand { display: flex; flex-direction: column; align-items: center;
                  gap: .4em; text-align: center; font-weight: 800;
                  letter-spacing: .02em; font-size: 1.02em;
                  color: #fff; text-transform: uppercase; }
.sidebar .brand:hover { text-decoration: none; }
.sidebar .brand img { height: 56px; width: auto; display: block;
                      filter: drop-shadow(0 0 14px rgba(0, 255, 204, .25)); }
.sidebar .brand .bta { color: var(--mint); }
.sidebar .brand-sub { display: block; font-size: .6em; font-weight: 600;
                       letter-spacing: .28em; color: var(--muted);
                       text-transform: uppercase; }
.sidebar-user { text-align: center; color: var(--text); font-weight: 700;
                font-size: .92em; margin-top: 1em; padding: .5em;
                background: var(--panel); border: 1px solid var(--border);
                border-radius: 8px; }
.sidebar-user small { display: block; color: var(--muted); font-weight: 400;
                      font-size: .82em; margin-top: .15em; }
.sidebar-nav { display: flex; flex-direction: column; gap: 1.3em; margin-top: 1.3em; }
.nav-group-title { font-size: .72em; letter-spacing: .18em; text-transform: uppercase;
                   color: var(--muted-dim); font-weight: 800;
                   margin-bottom: .45em; padding-left: .6em; }
.nav-link { display: block; padding: .55em .7em; border-radius: 8px;
            color: var(--muted); font-weight: 600; font-size: .95em; }
.nav-link:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.nav-link.active { background: var(--mint-bg); color: var(--mint);
                   border: 1px solid var(--mint-border); }
.sidebar-close { display: none; position: absolute; top: .4em; right: .5em;
                 background: none; border: none; color: var(--muted);
                 font-size: 1.6em; line-height: 1; cursor: pointer; padding: 0 .2em; }
.sidebar-close:hover { color: var(--mint); }
.hamburger { display: none; position: fixed; top: .7em; left: .7em; z-index: 110;
             background: var(--panel); border: 1px solid var(--border);
             color: var(--mint); border-radius: 8px; font-size: 1.3em;
             line-height: 1; padding: .35em .5em; cursor: pointer; }
.hamburger:hover { border-color: var(--mint); }
.sidebar-backdrop { display: none; position: fixed; inset: 0;
                    background: rgba(0, 0, 0, .6); z-index: 90; }
.sidebar-backdrop.show { display: block; }

.main-content { margin-left: 240px; min-height: 100vh; }
body:not(.has-sidebar) .main-content { margin-left: 0; }
@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); transition: transform .25s ease; }
  .sidebar.open { transform: translateX(0); }
  .hamburger { display: block; }
  .sidebar-close { display: block; }
  .main-content { margin-left: 0; }
}

.comp-banner { text-align: center; padding: .45em; font-size: .9em; font-weight: 600; }
.status-running { background: var(--green-bg); color: var(--green); }
.status-not_started { background: var(--amber-bg); color: var(--amber); }
.status-ended { background: var(--red-bg); color: var(--red); }

.container { max-width: 1200px; margin: 0 auto; padding: 1.2em 1em 3em; }
.footer { text-align: center; color: var(--muted-dim); padding: 1.8em 1em; font-size: .85em;
          background: var(--bg2); border-top: 1px solid var(--border); margin-top: 2em; }
.footer .tagline { color: var(--mint); font-weight: 700; letter-spacing: .12em;
                   text-transform: uppercase; font-size: .8em; }
.footer small { display: block; margin-top: .5em; color: var(--muted-dim); line-height: 1.7; }
.footer a { color: var(--mint); }
.footer .awards { color: var(--blue-lt); }

/* ---- Kartu & tombol ---- */
.card { background: var(--panel); border: 1px solid var(--border);
        border-radius: 12px; padding: 1.2em; margin-bottom: 1.2em;
        box-shadow: var(--shadow); }
.card h2 { margin-top: 0; font-size: 1.15em; color: #fff; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2em; }
@media (max-width: 800px) { .two-col { grid-template-columns: 1fr; } }
.page-head { display: flex; align-items: center; justify-content: space-between;
             flex-wrap: wrap; gap: .5em; margin-bottom: .8em; }
.page-head h1, h1 { margin: .2em 0 .6em; color: #fff; }
h1 .grad { background: linear-gradient(90deg, var(--mint), var(--blue-lt));
           -webkit-background-clip: text; background-clip: text; color: transparent; }
.muted { color: var(--muted); } .small { font-size: .85em; }
.back { display: inline-block; margin-bottom: .8em; }

.btn { display: inline-block; background: var(--panel2); color: var(--text);
       border: 1px solid var(--border); border-radius: 8px; padding: .5em 1em;
       cursor: pointer; font-size: .95em; font-weight: 600; }
.btn:hover { border-color: var(--mint); text-decoration: none;
             box-shadow: 0 0 0 3px rgba(0, 255, 204, .12); }
.btn-primary { background: linear-gradient(90deg, #00e6b8, var(--mint));
               border: none; color: #04281f; }
.btn-primary:hover { box-shadow: 0 4px 14px rgba(0, 255, 204, .35); }
.btn-danger { background: var(--red-bg); border: 1px solid var(--red); color: #ffb4ae; }
.btn-sm { padding: .25em .6em; font-size: .85em; }
.btn-block { width: 100%; margin-top: .5em; }

.flashes { margin-bottom: 1em; }
.flash { padding: .7em 1em; border-radius: 8px; margin-bottom: .5em; font-weight: 600; }
.flash-ok { background: var(--green-bg); border: 1px solid var(--green); color: var(--green); }
.flash-error { background: var(--red-bg); border: 1px solid var(--red); color: #ffb4ae; }

/* ---- Tabel / scoreboard ---- */
.table-wrap { overflow-x: auto; padding: 0; }
.table { width: 100%; border-collapse: collapse; font-size: .95em; }
.table th, .table td { padding: .65em .8em; border-bottom: 1px solid var(--border);
                       text-align: left; }
.table thead th { background: #071026; color: var(--mint); font-size: .85em;
                   letter-spacing: .06em; text-transform: uppercase;
                   border-bottom: 2px solid var(--mint-border); }
.table thead th:first-child { border-radius: 8px 0 0 0; }
.table thead th:last-child { border-radius: 0 8px 0 0; }
.table tbody tr { transition: background-color .4s, transform .4s; background: var(--panel); }
.table tbody tr:nth-child(even) { background: #0c1930; }
.table tbody tr:hover { background: #122544; }
.table tbody tr.rank-up { background: var(--green-bg); }
.table tbody tr.rank-down { background: var(--red-bg); }
.table .rank-1 td:first-child, .table .rank-2 td:first-child,
.table .rank-3 td:first-child { font-weight: 800; color: #fff; }
.table .rank-1 { box-shadow: inset 4px 0 0 var(--gold); }
.table .rank-2 { box-shadow: inset 4px 0 0 var(--silver); }
.table .rank-3 { box-shadow: inset 4px 0 0 var(--bronze); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
             gap: 1em; margin-bottom: 1.2em; }
.stat-card { background: var(--panel); border: 1px solid var(--border);
             border-radius: 12px; padding: 1em; text-align: center;
             box-shadow: var(--shadow); border-top: 3px solid var(--mint); }
.stat-num { font-size: 1.8em; font-weight: 800; color: var(--mint); }
.stat-label { color: var(--muted); font-size: .85em; }

.badge { display: inline-block; background: var(--panel2); border: 1px solid var(--border);
         border-radius: 20px; padding: .15em .7em; font-size: .8em; margin: .1em;
         color: var(--text); font-weight: 600; }
.badge-solved { background: var(--green-bg); border-color: var(--green); color: var(--green); }
.badge-dyn { background: rgba(163, 113, 247, .14); border-color: var(--purple); color: #c9a8ff; }
.badge-type { border-color: var(--mint-border); color: var(--mint); }
.badge-on { background: var(--green-bg); border-color: var(--green); color: var(--green); }
.badge-off { background: var(--red-bg); border-color: var(--red); color: #ffb4ae; }
.badge-btn { cursor: pointer; font: inherit; }

.form-grid label { display: block; margin-bottom: .8em; font-weight: 600; }
.form-grid small { font-weight: 400; }
input[type=text], input[type=password], input[type=email], input[type=number],
input[type=datetime-local], select, textarea {
  width: 100%; background: #060d1d; border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); padding: .55em .7em; margin-top: .3em;
  font: inherit; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--mint);
  box-shadow: 0 0 0 3px rgba(0, 255, 204, .15); }
input[type=checkbox], input[type=radio] { width: auto; margin-right: .4em; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: .8em; }
.form-actions { margin-top: 1em; display: flex; gap: .6em; }
pre { background: #060d1d; color: var(--blue-lt); padding: .8em; border-radius: 8px;
      overflow-x: auto; border: 1px solid var(--border); }
code { background: var(--panel2); border: 1px solid var(--border);
       padding: .1em .35em; border-radius: 4px; color: var(--mint); }

/* ---- Login & hero acara ---- */
.login-hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 1.5em;
              align-items: start; margin-bottom: 1.5em; }
@media (max-width: 900px) { .login-hero { grid-template-columns: 1fr; } }
.hero-panel { background: linear-gradient(160deg, var(--panel), var(--bg2));
              border: 1px solid var(--border); border-radius: 14px;
              padding: 2em 1.6em; box-shadow: var(--shadow); text-align: center; }
.logo-hero { max-width: 300px; width: 70%; height: auto; margin: 0 auto .8em;
             display: block; filter: drop-shadow(0 0 22px rgba(0, 255, 204, .25)); }
.event-kicker { font-size: .78em; font-weight: 800; letter-spacing: .3em;
                text-transform: uppercase; color: var(--mint); }
.hero-tagline { color: var(--text); font-size: 1.02em; line-height: 1.65;
                max-width: 46em; margin: .8em auto 0; }
.chips { display: flex; flex-wrap: wrap; gap: .5em; justify-content: center;
         margin-top: 1.1em; }
.chip { border: 1px solid var(--mint-border); background: var(--mint-bg);
        color: var(--mint); border-radius: 20px; padding: .3em .9em;
        font-size: .82em; font-weight: 700; }
.countdown { display: flex; gap: .6em; justify-content: center; margin-top: 1.2em;
              flex-wrap: wrap; }
.cd-box { background: #060d1d; border: 1px solid var(--border); border-radius: 10px;
          min-width: 74px; padding: .6em .4em; }
.cd-box b { display: block; font-size: 1.5em; color: var(--mint);
            font-variant-numeric: tabular-nums; }
.cd-box span { font-size: .68em; letter-spacing: .14em; text-transform: uppercase;
               color: var(--muted-dim); }
.cd-label { width: 100%; font-size: .78em; letter-spacing: .22em;
            text-transform: uppercase; color: var(--muted); margin-bottom: .2em; }
.login-card { width: 100%; }
.login-card h1 { margin-top: 0; }
.event-title { font-size: 1.6em; font-weight: 800; font-style: italic;
               text-transform: uppercase; margin: .15em 0; line-height: 1.15; }
.event-title .grad { background: linear-gradient(90deg, var(--mint), var(--blue-lt));
                     -webkit-background-clip: text; background-clip: text;
                     color: transparent; }
.event-strip { display: flex; gap: 1em; flex-wrap: wrap; }
.event-item { flex: 1 1 200px; background: var(--panel); border: 1px solid var(--border);
              border-left: 4px solid var(--mint); border-radius: 10px; padding: .9em 1em;
              box-shadow: var(--shadow); }
.event-item b { display: block; font-size: .78em; letter-spacing: .1em;
                text-transform: uppercase; color: var(--muted); margin-bottom: .25em; }
.event-item span { font-weight: 800; font-size: 1.02em; color: #fff; }

/* ---- Tantangan ---- */
.chal-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
             gap: 1em; }
.chal-card { background: var(--panel); border: 1px solid var(--border);
             border-radius: 12px; padding: 1em; color: var(--text);
             transition: transform .15s, border-color .15s, box-shadow .15s;
             display: block; box-shadow: var(--shadow); border-top: 3px solid var(--mint); }
.chal-card:hover { transform: translateY(-3px); border-color: var(--mint);
                   box-shadow: 0 8px 22px rgba(0, 255, 204, .15); text-decoration: none; }
.chal-card.solved { border-top-color: var(--green); }
.chal-card h3 { margin: .5em 0; color: #fff; }
.chal-meta { display: flex; gap: .9em; flex-wrap: wrap; font-size: .85em; color: var(--muted); }
.chal-meta .pts { color: var(--amber); font-weight: 800; }
.chal-top { display: flex; flex-wrap: wrap; gap: .2em; }
.filters { display: flex; gap: .6em; flex-wrap: wrap; margin-bottom: 1em; align-items: center; }
.filters input, .filters select { width: auto; margin-top: 0; }
.filters .check { font-weight: 400; font-size: .9em; }
.score-chip { background: var(--panel); border: 2px solid var(--amber); color: var(--amber);
              border-radius: 20px; padding: .4em 1em; font-weight: 800; }

.desc { line-height: 1.6; }
.desc code { color: var(--mint); }
.chal-points { font-size: 1.05em; }
.hint-box { background: var(--amber-bg); border: 1px solid var(--amber); border-radius: 8px;
            padding: .8em; margin: 1em 0; color: #e8c06a; }
.mcq { display: block; background: var(--panel2); border: 1px solid var(--border);
       border-radius: 8px; padding: .6em; margin-bottom: .5em; cursor: pointer;
       font-weight: 400; color: var(--text); }
.mcq:hover { border-color: var(--mint); }
.subs { list-style: none; padding: 0; }
.subs li { padding: .4em .6em; border-bottom: 1px solid var(--border); font-size: .9em; }
.subs li.good { border-left: 3px solid var(--green); }
.subs li.bad { border-left: 3px solid var(--red); }

.activity { list-style: none; padding: 0; margin: 0; max-height: 380px; overflow-y: auto; }
.activity li { padding: .45em 0; border-bottom: 1px solid var(--border); font-size: .9em; }
.act-time { color: var(--muted-dim); font-size: .8em; margin-right: .4em; }

.live-dot { color: var(--mint); font-size: .6em; vertical-align: middle;
            animation: blink 1.5s infinite; }
@keyframes blink { 50% { opacity: .2; } }
.chart-box { position: relative; height: 320px; background: var(--panel);
             border: 1px solid var(--border); border-radius: 12px; padding: .8em;
             box-shadow: var(--shadow); }
#sb-meta { text-align: right; }