/* Steering Arena — 8-bit arcade cabinet theme.
   Press Start 2P for chrome (titles/labels/scores/ranks/buttons);
   VT323 (readable retro terminal) for body + the sequence column. */

:root {
  --bg: #0a0a18;
  --panel: #161333;
  --panel-2: #0f0d26;
  --ink: #f6f7ff;
  --muted: #9b9ad6;
  --gold: #ffd23f;
  --silver: #cfd6e6;
  --bronze: #e0894a;
  --green: #44d62c;
  --green-sh: #1c7a14;
  --red: #ff5277;
  --cyan: #3ad0ff;
  --pink: #ff5fb1;
  --pixel: "Press Start 2P", monospace;
  --term: "VT323", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--term);
  font-size: 21px;
  line-height: 1.25;
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 18% 8%, rgba(58, 208, 255, 0.10), transparent 42%),
    radial-gradient(circle at 86% 4%, rgba(255, 95, 177, 0.10), transparent 42%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.022) 0 1px, transparent 1px 18px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.022) 0 1px, transparent 1px 18px);
  min-height: 100vh;
  image-rendering: pixelated;
}

/* CRT scanlines + vignette overlay */
.scanlines {
  position: fixed; inset: 0; z-index: 50; pointer-events: none;
  background:
    repeating-linear-gradient(to bottom, rgba(0,0,0,0) 0 2px, rgba(0,0,0,0.16) 2px 4px),
    radial-gradient(ellipse at center, transparent 58%, rgba(0,0,0,0.45) 100%);
}

.wrap { width: min(1040px, 92vw); margin: 0 auto; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--ink); }

/* Pixel-font helpers */
h1, h2, label, .chip, .btn, .mini, .rank, .num, .big, .tag, .insert, .empty, th, code {
  font-family: var(--pixel);
}

/* ---- Header / marquee ---- */
.topbar { padding: 34px 0 22px; text-align: center; }
.marquee { display: flex; align-items: center; justify-content: center; gap: 18px; }
.coin {
  color: var(--gold); font-size: 14px;
  text-shadow: 0 0 8px rgba(255, 210, 63, 0.7);
  animation: spin 1.6s steps(8) infinite;
}
h1 {
  font-size: clamp(18px, 5.2vw, 40px);
  margin: 0; line-height: 1.1; letter-spacing: 1px;
  color: var(--ink);
  text-shadow:
    3px 3px 0 var(--pink),
    6px 6px 0 var(--cyan);
}
.tag { font-size: 9px; color: var(--muted); margin: 18px 0 0; line-height: 1.8; }
.tag b { color: var(--gold); }
.insert { font-size: 10px; margin: 14px 0 0; }
.insert a { color: var(--green); }
.nav { font-family: var(--pixel); font-size: 9px; margin: 12px 0 0; line-height: 1.8; }
.nav a { color: var(--cyan); }

/* Reproducibility page bits */
.rules-list { margin: 0; padding-left: 4px; list-style: none; }
.rules-list li { margin: 12px 0; color: #cfd0ff; font-size: 19px; line-height: 1.45; }
.rules-list li b { font-family: var(--pixel); font-size: 9px; color: var(--cyan); margin-right: 6px; }
.rules-list em { color: var(--gold); font-style: normal; }
.formula { font-family: var(--term); font-size: 18px; color: var(--green); background: var(--panel-2);
  border: 3px solid #2b2860; padding: 12px 14px; white-space: pre-wrap; line-height: 1.4; overflow-x: auto; }
.ok-tag { font-family: var(--pixel); font-size: 8px; color: #06210a; background: var(--green);
  padding: 3px 6px; margin-left: 6px; white-space: nowrap; }
footer a { color: var(--cyan); }

/* ---- Season banner ---- */
.banner { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 8px auto 26px; }
.chip {
  font-size: 8px; line-height: 1.6;
  background: var(--panel-2); color: var(--cyan);
  border: 3px solid #2b2860; padding: 8px 10px;
}
.chip i { color: var(--muted); font-style: normal; margin-right: 4px; }
.chip span { color: var(--ink); }
.chip.lit { color: #06210a; background: var(--gold); border-color: #b9911a; }
.chip.lit span { color: #06210a; }

/* ---- Cards (pixel panels) ---- */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: start; }
@media (max-width: 780px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--panel);
  border: 4px solid var(--ink);
  box-shadow: 0 0 0 4px var(--bg), 10px 10px 0 0 rgba(0, 0, 0, 0.55);
  padding: 22px; margin-bottom: 26px;
}
h2 {
  font-size: 13px; margin: 0 0 14px; color: var(--gold);
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.6);
}
.muted { color: var(--muted); }
.row { display: flex; align-items: center; gap: 12px; }
.between { justify-content: space-between; }

/* ---- Form ---- */
label { display: block; font-size: 9px; color: var(--cyan); margin: 18px 0 8px; }
input, textarea {
  width: 100%; background: var(--panel-2); color: var(--ink);
  border: 3px solid #2b2860; padding: 12px 12px; font-family: var(--term);
  font-size: 20px; line-height: 1.3;
}
input { font-family: var(--pixel); font-size: 12px; letter-spacing: 1px; }
textarea { resize: vertical; }
input::placeholder, textarea::placeholder { color: #5a5790; }
input:focus, textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(58, 208, 255, 0.25); }

.est { font-family: var(--term); font-size: 17px; color: var(--muted); }
.est .hint { opacity: 0.65; }

.btn {
  font-size: 11px; color: #06210a; background: var(--green);
  border: 0; padding: 14px 16px; cursor: pointer;
  box-shadow: 0 6px 0 0 var(--green-sh); transition: transform 0.04s, box-shadow 0.04s;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(5px); box-shadow: 0 1px 0 0 var(--green-sh); }
.btn:disabled { background: #4a4870; color: #2a285a; box-shadow: 0 6px 0 0 #2a285a; cursor: not-allowed; }

.mini {
  font-size: 8px; color: var(--cyan); background: var(--panel-2);
  border: 3px solid #2b2860; padding: 7px 9px; cursor: pointer;
}
.mini:hover { color: var(--ink); border-color: var(--cyan); }

/* ---- Readout (score / error) ---- */
.readout {
  margin-top: 18px; padding: 14px; border: 3px solid; display: flex;
  flex-direction: column; gap: 8px; font-size: 9px; line-height: 1.7;
}
.readout .big { font-size: 22px; }
.readout.ok { border-color: var(--green); color: var(--green); background: rgba(68, 214, 44, 0.08); }
.readout.err { border-color: var(--red); color: var(--red); background: rgba(255, 82, 119, 0.08); }
.readout span:not(.big) { font-family: var(--term); font-size: 18px; color: var(--ink); }

/* ---- Leaderboard tabs ---- */
.tabs { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; }
.tab {
  font-size: 9px; color: var(--muted); background: var(--panel-2);
  border: 3px solid #2b2860; padding: 9px 10px; cursor: pointer;
}
.tab:hover:not(.on) { color: var(--ink); }
.tab.on { color: #1a0a12; background: var(--gold); border-color: #b9911a; }
.tab.anti.on { background: var(--pink); border-color: #b83c7e; }
.refresh { margin-left: auto; }
.board-cap { font-family: var(--term); font-size: 16px; color: var(--muted); margin: 0 0 6px; }
.disclaimer { font-family: var(--term); font-size: 15px; color: #8f93b5; margin: 0 0 12px;
  border-left: 3px solid #2b2860; padding-left: 10px; line-height: 1.35; }
.disclaimer a { color: var(--cyan); }
.tag b.anti { color: var(--pink); }

/* ---- Leaderboard ---- */
.board { width: 100%; border-collapse: collapse; }
.board th {
  font-size: 8px; color: var(--muted); text-align: left;
  padding: 8px 8px; border-bottom: 3px solid #2b2860;
}
.board th.num, .board td.num { text-align: right; }
.board td { padding: 11px 8px; border-bottom: 2px solid rgba(43, 40, 96, 0.55); vertical-align: top; }
.board .rank { font-size: 11px; color: var(--muted); width: 34px; }
.board .player { font-family: var(--pixel); font-size: 10px; letter-spacing: 1px; color: var(--ink); }
.board .seq { font-family: var(--term); font-size: 19px; color: #d7d8ff; max-width: 320px; }
.board .seqbox { cursor: pointer; word-break: break-word; white-space: pre-wrap; }
/* Long sequences clamp to ~3 lines with an ellipsis until the row is clicked. */
.board .seqbox.clamp { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.board .seqbox:hover { color: #fff; }
/* Expanded board scrolls inside a fixed-height panel so ALL entries are reachable
   without the page growing unbounded; the header row stays pinned while scrolling. */
.board-wrap.scroll { max-height: 60vh; overflow-y: auto; border: 2px solid #2b2860; }
.board-wrap.scroll thead th { position: sticky; top: 0; background: var(--panel); z-index: 2; }
.board-wrap.scroll::-webkit-scrollbar { width: 10px; }
.board-wrap.scroll::-webkit-scrollbar-track { background: var(--panel-2); }
.board-wrap.scroll::-webkit-scrollbar-thumb { background: #2b2860; border: 2px solid var(--panel); }
.board .num { font-size: 12px; color: var(--ink); font-variant-numeric: tabular-nums; }
.board td.spec { color: var(--cyan); font-size: 11px; }

.board tr.gold   td { background: rgba(255, 210, 63, 0.08); }
.board tr.gold   .rank, .board tr.gold   .num { color: var(--gold); text-shadow: 0 0 8px rgba(255,210,63,0.5); }
.board tr.silver .rank, .board tr.silver .num { color: var(--silver); }
.board tr.bronze .rank, .board tr.bronze .num { color: var(--bronze); }

.empty { font-size: 11px; line-height: 2.2; color: var(--muted); text-align: center; padding: 16px 0; }
.showmore { display: block; width: 100%; margin-top: 12px; text-align: center; }

/* ---- Rules ---- */
.rules ul { margin: 0; padding-left: 4px; list-style: none; }
.rules li { margin: 14px 0; color: #cfd0ff; font-size: 19px; line-height: 1.4; }
.rules li b { font-family: var(--pixel); font-size: 9px; color: var(--cyan); margin-right: 6px; }
.rules em { color: var(--gold); font-style: normal; }
code {
  font-size: 9px; background: var(--panel-2); color: var(--gold);
  padding: 2px 6px; border: 2px solid #2b2860;
}

footer { padding: 26px 0 48px; text-align: center; font-size: 8px; color: var(--muted); line-height: 2; }

/* ---- Animations ---- */
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0.15; } }
@keyframes spin { to { transform: rotate(360deg); } }
.blink { animation: blink 1.1s steps(1) infinite; }

@media (prefers-reduced-motion: reduce) {
  .blink, .coin { animation: none; }
  .btn { transition: none; }
}