/* RocketCode CTF — dark "mission control" take on the RocketCode design system
   (Instrument Sans, ink #0B1020, indigo = signal, orange gradient = action). */
:root{
  --bg:#080B14;--panel:#0F1426;--panel2:#141A30;--line:rgba(255,255,255,.08);--line2:rgba(255,255,255,.14);
  --ink:#F4F6FB;--body:#B8C0D4;--muted:#7C86A2;--indigo:#6366F1;--indigo-l:#A5B4FC;--orange:#FF7A1A;--orange2:#FFA265;
  --grad:linear-gradient(135deg,#FF7A1A,#FFA265);--ok:#34D399;--bad:#F87171;
  --font:'Instrument Sans',ui-sans-serif,system-ui,-apple-system,sans-serif;--mono:ui-monospace,'SF Mono',Menlo,monospace;
  --r:16px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;background:var(--bg);color:var(--body);font:16px/1.55 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--indigo-l)}
b,strong,h1,h2,h3{color:var(--ink)}
h1,h2,h3{letter-spacing:-.02em;line-height:1.15;margin:0}
code{font-family:var(--mono);background:rgba(255,255,255,.06);padding:1px 6px;border-radius:6px;color:var(--ink)}
.muted{color:var(--muted)}

/* background */
.sky{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.sky::before{content:"";position:absolute;top:-320px;left:30%;width:1100px;height:800px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.20),transparent 62%)}
.sky::after{content:"";position:absolute;bottom:-260px;right:-200px;width:700px;height:700px;border-radius:50%;background:radial-gradient(circle,rgba(255,122,26,.11),transparent 62%)}
.stars{position:absolute;inset:0;background-image:radial-gradient(1px 1px at 12% 18%,#fff8,transparent),radial-gradient(1px 1px at 72% 12%,#fff6,transparent),radial-gradient(1.5px 1.5px at 38% 62%,#fff7,transparent),radial-gradient(1px 1px at 88% 48%,#fff5,transparent),radial-gradient(1px 1px at 22% 82%,#fff6,transparent),radial-gradient(1.5px 1.5px at 58% 32%,#fff5,transparent),radial-gradient(1px 1px at 92% 86%,#fff7,transparent),radial-gradient(1px 1px at 6% 52%,#fff5,transparent),radial-gradient(1px 1px at 48% 92%,#fff6,transparent);animation:twinkle 6s ease-in-out infinite alternate}
@keyframes twinkle{from{opacity:.45}to{opacity:1}}
.orbits{position:absolute;width:820px;height:820px;right:-280px;top:-240px;fill:none;stroke:rgba(165,180,252,.15);stroke-width:1;animation:spin 140s linear infinite}
.orbits .sat{fill:var(--orange);stroke:none}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.orbits,.stars{animation:none}}

/* header */
header.top,main{position:relative;z-index:1}
header.top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;max-width:1180px;margin:0 auto;padding:18px 20px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.brand svg{height:30px;width:auto;display:block}.brand svg path{fill:#fff}
.brand .sep{width:1px;height:30px;background:var(--line2)}
.brand .ev{display:flex;flex-direction:column;line-height:1.2}
.brand .ev b{font-size:15px;letter-spacing:.06em;text-transform:uppercase}
.brand .ev span{font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
nav a{color:var(--body);text-decoration:none;font-weight:600;font-size:14px;padding:8px 12px;border-radius:8px}
nav a.on,nav a:hover{color:var(--ink);background:rgba(255,255,255,.06)}
.me{display:flex;align-items:center;gap:10px;margin-left:8px;padding:6px 6px 6px 12px;border:1px solid var(--line2);border-radius:999px;font-size:14px}
.me b{font-variant-numeric:tabular-nums}
.pts{background:var(--grad);color:#fff;font-weight:700;border-radius:999px;padding:3px 10px;font-size:13px}

main{max-width:1180px;margin:0 auto;padding:4px 20px 60px}

/* generic */
.panel{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:0 14px 34px -20px rgba(0,0,0,.6)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--indigo-l)}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--grad);border-radius:2px}
.hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px/1 var(--font);border-radius:8px;padding:13px 18px;border:1px solid var(--line2);background:#1a2140;color:var(--ink);cursor:pointer;transition:transform .18s ease,box-shadow .18s ease;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn:disabled{opacity:.5;cursor:default;transform:none}
.btn.primary{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 10px 26px rgba(255,122,26,.30)}
.btn.ghost{background:rgba(99,102,241,.08);color:var(--indigo-l);border-color:rgba(99,102,241,.3)}
.btn.small{padding:8px 12px;font-size:13px}
input.text{width:100%;min-width:0;background:#0A0E1C;border:1px solid var(--line2);color:var(--ink);border-radius:8px;padding:12px 14px;font:600 16px var(--font)}
input.flag{font-family:var(--mono);letter-spacing:.04em}
input.text:focus{outline:none;border-color:var(--indigo);box-shadow:0 0 0 3px rgba(99,102,241,.3)}
.row{display:flex;gap:8px;align-items:center}
.fb{min-height:22px;margin-top:8px;font-weight:600;font-size:14px}.fb.ok{color:var(--ok)}.fb.bad{color:var(--bad)}

/* join */
.join{display:grid;grid-template-columns:1.2fr .8fr;gap:20px;margin-top:10px;align-items:start}
.join h1{font-size:44px;margin:10px 0 12px}
.join .story{font-size:18px}
.join ul{padding-left:20px}.join li{margin:6px 0}
@media(max-width:860px){.join{grid-template-columns:1fr}.join h1{font-size:34px}}

/* board */
.boardhead{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin:10px 0 18px}
.boardhead h1{font-size:34px;margin-top:6px}
.progress{min-width:220px}
.bar{height:8px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;background:var(--grad);border-radius:99px}
.cat{margin:26px 0 10px;display:flex;align-items:center;gap:10px}
.cat h2{font-size:18px;text-transform:uppercase;letter-spacing:.08em}
.cat small{color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.tile{position:relative;text-align:left;font:inherit;color:inherit;cursor:pointer;background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:14px;padding:16px;min-height:118px;display:flex;flex-direction:column;justify-content:space-between;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.tile:hover{transform:translateY(-2px);border-color:rgba(99,102,241,.45);box-shadow:0 10px 30px -14px rgba(99,102,241,.5)}
.tile h3{font-size:17px}
.tile .meta{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);margin-top:10px}
.tile .p{font:700 20px var(--font);color:var(--ink);font-variant-numeric:tabular-nums}
.tile.solved{border-color:rgba(52,211,153,.45);background:linear-gradient(180deg,rgba(52,211,153,.10),var(--panel))}
.tile.solved .p{color:var(--ok)}
.tile.partial{border-color:rgba(255,162,101,.45)}
.tile.locked{cursor:not-allowed;opacity:.55}
.tile.locked:hover{transform:none;box-shadow:none;border-color:var(--line)}
.tile .badge{position:absolute;top:12px;right:12px;font-size:12px;font-weight:700;color:var(--ok)}
.tile .blood{color:#fca5a5}

/* challenge modal */
dialog{border:1px solid var(--line2);border-radius:20px;padding:0;background:var(--panel);color:var(--body);width:min(860px,calc(100vw - 24px));max-height:calc(100vh - 32px);box-shadow:0 30px 80px rgba(0,0,0,.6)}
dialog::backdrop{background:rgba(4,6,12,.75);backdrop-filter:blur(3px)}
.mhead{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:20px 24px;background:linear-gradient(180deg,var(--panel2),var(--panel));border-bottom:1px solid var(--line)}
.mhead h2{font-size:26px;margin-top:6px}
.close{background:none;border:1px solid var(--line2);color:var(--ink);border-radius:8px;width:36px;height:36px;font-size:18px;cursor:pointer}
.mbody{padding:20px 24px 26px}
.desc{font-size:16.5px}
.desc p{margin:0 0 12px}
.desc .cipher{font:700 26px/1.4 var(--mono);letter-spacing:.08em;color:var(--ink);background:#0A0E1C;border:1px solid var(--line2);border-radius:14px;padding:20px;text-align:center;word-break:break-word;margin:14px 0}
.desc .eq{font-size:24px;line-height:1.7;color:var(--ink);background:#0A0E1C;border:1px solid var(--line2);border-radius:14px;padding:12px 20px;margin:12px 0}
.desc ol.emoji{font-size:22px;line-height:1.8;columns:2;color:var(--ink)}
.files{display:grid;gap:12px;margin:16px 0}
.files figure{margin:0}
.files img{display:block;width:100%;border-radius:12px;border:1px solid var(--line2);background:#000}
.files figcaption{font-size:13px;color:var(--muted);margin-top:6px}
.files.gallery{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.files .num{position:absolute;top:8px;left:8px;background:rgba(8,11,20,.85);border:1px solid var(--line2);color:var(--ink);font:700 13px var(--mono);padding:3px 8px;border-radius:8px}
.files figure{position:relative}
.dl{display:inline-flex;gap:6px;margin:4px 8px 0 0}
.flagbox{margin-top:18px;border-top:1px solid var(--line);padding-top:16px}
.part{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;margin:8px 0}
.part label{font:600 13px var(--mono);color:var(--muted);min-width:60px}
.part .ok{color:var(--ok);font-weight:700}
.part.single{grid-template-columns:1fr auto}
.hints{margin-top:18px;border-top:1px solid var(--line);padding-top:14px}
.hint{background:rgba(99,102,241,.08);border:1px solid rgba(99,102,241,.25);border-radius:10px;padding:10px 12px;margin:8px 0;color:#D6DCFF}
.hint b{color:var(--indigo-l)}
.reveal{margin-top:16px;border:1px solid rgba(255,122,26,.35);background:rgba(255,122,26,.08);border-radius:14px;padding:14px 16px;color:var(--ink)}
.locknote{font-size:14px;color:var(--muted)}

/* widgets */
.screen{background:#05070f;border:1px solid rgba(52,211,153,.25);border-radius:12px;padding:18px;margin:14px 0;font:15px/1.6 var(--mono);color:#7dffa8}
.screen small{color:#4e9a6a}
.redact{background:#7dffa8;color:#7dffa8}
.led{width:22px;height:22px;border-radius:50%;background:#1b2a20;margin-top:14px;border:1px solid #2a4a35}
.led.on{background:#7dffa8;box-shadow:0 0 18px #7dffa8}

/* scoreboard */
.sb{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.sb th{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);text-align:left;padding:10px 12px;border-bottom:1px solid var(--line2)}
.sb td{padding:12px;border-bottom:1px solid var(--line);color:var(--ink)}
.sb tr.mine td{background:rgba(99,102,241,.10)}
.sb .rank{width:60px;font-weight:700;color:var(--muted)}
.sb tr:nth-child(2) .rank,.sb tr:nth-child(3) .rank,.sb tr:nth-child(4) .rank{color:var(--orange2)}
.sb .score{text-align:right;font-weight:700;font-size:18px}
.feed{list-style:none;padding:0;margin:0}
.feed li{padding:8px 0;border-bottom:1px solid var(--line);font-size:14px}
.sbwrap{display:grid;grid-template-columns:1.6fr 1fr;gap:20px;margin-top:10px}
@media(max-width:860px){.sbwrap{grid-template-columns:1fr}}
body.tv header.top{max-width:none;padding:28px 48px}
body.tv main{max-width:none;padding:0 48px}
body.tv .sb td{font-size:28px;padding:16px 12px}
body.tv .sb .score{font-size:34px}
body.tv .feed li{font-size:20px}
body.tv .tvtitle{font-size:56px}

/* toasts */
#toasts{position:fixed;right:16px;bottom:16px;z-index:50;display:flex;flex-direction:column;gap:8px;max-width:min(420px,calc(100vw - 32px))}
.toast{background:var(--panel2);border:1px solid var(--line2);border-left:3px solid var(--orange);border-radius:12px;padding:12px 14px;color:var(--ink);box-shadow:0 14px 34px -10px rgba(0,0,0,.7);animation:pop .25s ease}
.toast.blood{border-left-color:#ef4444}
@keyframes pop{from{transform:translateY(10px);opacity:0}}

@media(max-width:560px){.brand .sep,.brand .ev{display:none}.part{grid-template-columns:1fr auto}.part label{grid-column:1/-1}.desc ol.emoji{columns:1}}

.flagbox>.eyebrow,.hints>.eyebrow{display:flex;margin-bottom:8px}
dialog{scrollbar-color:#2a3150 transparent;scrollbar-width:thin}