/* Bit Tic-Tac-Toe — "hunter" theme: carbon black, acid lime and blood orange, cut-corner panels. */

:root {
  --bg: #09090c;
  --bg-2: #0f0f14;
  --panel: #13131a;
  --panel-2: #191921;
  --line: #262632;
  --line-2: #34343f;
  --ink: #ecece4;
  --muted: #8b8b97;
  --x: #c6ff00;
  --x-dim: rgba(198, 255, 0, 0.14);
  --o: #ff5a1f;
  --o-dim: rgba(255, 90, 31, 0.14);
  --danger: #ff2e4d;
  --cut: 14px;
  --display: "Chakra Petch", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--display);
  overflow-x: hidden;
}

.backdrop {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60rem 40rem at 15% -10%, rgba(198, 255, 0, 0.08), transparent 60%),
    radial-gradient(50rem 40rem at 110% 110%, rgba(255, 90, 31, 0.09), transparent 60%),
    repeating-linear-gradient(0deg, transparent 0 47px, rgba(255, 255, 255, 0.025) 47px 48px),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(255, 255, 255, 0.025) 47px 48px),
    var(--bg);
}

/* ───────── Top bar ───────── */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 16px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 9, 12, 0.8);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.crest { width: 34px; height: 34px; color: var(--x); }
.wordmark { font-weight: 700; letter-spacing: 0.08em; font-size: 18px; white-space: nowrap; }
.wordmark .dash { color: var(--x); margin: 0 2px; }
.tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; color: var(--muted);
  border: 1px solid var(--line-2); padding: 4px 8px;
}
.topbar-actions { margin-left: auto; display: flex; gap: 8px; }

/* ───────── Buttons ───────── */
.btn {
  --c: var(--x);
  font: 700 14px/1 var(--display); letter-spacing: 0.12em; text-transform: uppercase;
  border: 0; cursor: pointer; padding: 14px 22px; color: #0a0a0a; background: var(--c);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: transform 0.12s, filter 0.12s;
}
.btn:hover { filter: brightness(1.1); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.btn.ghost { background: var(--panel-2); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line-2); }
.btn.ghost:hover { color: var(--x); }
.btn.small { padding: 10px 14px; font-size: 12px; white-space: nowrap; }
.btn.block { width: 100%; }

/* ───────── Layout ───────── */
.arena {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  grid-template-areas: "hud hud" "board side";
  gap: 24px;
  max-width: 1120px; margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 40px) 48px;
}
.hud { grid-area: hud; }
.board-wrap { grid-area: board; }
.side { grid-area: side; display: flex; flex-direction: column; gap: 16px; }

/* ───────── HUD ───────── */
.hud { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: stretch; }
.label { font-family: var(--mono); font-size: 10px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--muted); }

.player-card {
  --c: var(--x); --c-dim: var(--x-dim);
  position: relative; display: grid; align-items: center;
  grid-template-columns: auto 1fr auto; grid-template-rows: auto auto;
  column-gap: 14px; padding: 16px 20px;
  background: var(--panel);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  box-shadow: inset 0 0 0 1px var(--line);
  transition: background 0.2s, box-shadow 0.2s;
}
.player-card.o { --c: var(--o); --c-dim: var(--o-dim); }
.player-card .label { grid-column: 2; grid-row: 1; }
.player-card .glyph { grid-column: 1; grid-row: 1 / 3; width: 44px; height: 44px; color: var(--c); }
.player-card .glyph svg { width: 100%; height: 100%; }
.player-card .name { grid-column: 2; grid-row: 2; font-weight: 700; font-size: 18px; letter-spacing: 0.04em; }
.player-card .score { grid-column: 3; grid-row: 1 / 3; font: 800 44px/1 var(--mono); color: var(--c); }
.player-card.active { background: linear-gradient(90deg, var(--c-dim), var(--panel) 70%); box-shadow: inset 0 0 0 1px var(--c); }
.player-card.active::after {
  content: "TO MOVE"; position: absolute; top: 0; right: 0;
  font: 700 9px/1 var(--mono); letter-spacing: 0.2em; padding: 5px 8px 5px 12px;
  background: var(--c); color: #0a0a0a;
}

.round-box {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 24px; min-width: 190px;
  background: var(--bg-2); box-shadow: inset 0 0 0 1px var(--line);
}
.round { font: 800 34px/1 var(--mono); }
.round .of { color: var(--muted); font-size: 20px; }
.round-box.overtime .round, .round-box.overtime .label { color: var(--danger); }
.pips { display: flex; gap: 4px; flex-wrap: wrap; justify-content: center; max-width: 170px; }
.pip { width: 10px; height: 10px; background: var(--line-2); transform: skewX(-18deg); }
.pip.x { background: var(--x); }
.pip.o { background: var(--o); }
.pip.d { background: var(--muted); }
.pip.now { box-shadow: 0 0 0 1px var(--ink); background: transparent; }
.draws { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 0.1em; }
.draws b { color: var(--ink); }

/* ───────── Board ───────── */
.board-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.turn { font: 600 13px/1 var(--mono); letter-spacing: 0.24em; text-transform: uppercase; color: var(--muted); min-height: 1em; }
.turn b.x { color: var(--x); }
.turn b.o { color: var(--o); }

.board {
  --size: min(100%, 480px);
  width: var(--size); aspect-ratio: 1;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-template-rows: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 8px;
  background: var(--line);
  clip-path: polygon(22px 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%, 0 22px);
  position: relative;
}
.board.locked .cell { cursor: default; }

.cell {
  position: relative; border: 0; padding: 0; margin: 0;
  background: var(--bg-2); color: var(--ink); cursor: pointer;
  display: grid; place-items: center;
  transition: background 0.15s;
  font: inherit;
}
.cell:not(.filled):hover { background: var(--panel-2); }
.board[data-turn="X"] .cell:not(.filled):hover .ghost { color: var(--x); opacity: 0.22; }
.board[data-turn="O"] .cell:not(.filled):hover .ghost { color: var(--o); opacity: 0.22; }
.board.locked .cell:hover .ghost { opacity: 0 !important; }
.cell:focus-visible { outline: 2px solid var(--ink); outline-offset: -4px; z-index: 1; }

.cell .coord { position: absolute; left: 8px; top: 6px; font: 600 10px/1 var(--mono); color: var(--line-2); letter-spacing: 0.1em; }
.cell svg { width: 64%; height: 64%; }
.cell .ghost { position: absolute; inset: 18%; width: 64%; height: 64%; opacity: 0; transition: opacity 0.12s; }
.cell .piece { animation: drop 0.22s cubic-bezier(.2, 1.4, .4, 1); }
.cell.x .piece { color: var(--x); filter: drop-shadow(0 0 10px rgba(198, 255, 0, 0.35)); }
.cell.o .piece { color: var(--o); filter: drop-shadow(0 0 10px rgba(255, 90, 31, 0.35)); }

.cell .vet {
  position: absolute; right: 6px; bottom: 6px;
  font: 700 10px/1 var(--mono); letter-spacing: 0.06em; padding: 3px 5px;
  background: var(--panel-2); color: var(--muted); box-shadow: inset 0 0 0 1px var(--line-2);
}
.cell.x .vet.kept { color: var(--x); box-shadow: inset 0 0 0 1px var(--x); }
.cell.o .vet.kept { color: var(--o); box-shadow: inset 0 0 0 1px var(--o); }

.cell.last::before {
  content: ""; position: absolute; inset: 6px; pointer-events: none;
  border: 1px dashed var(--line-2);
}
.cell.win { background: var(--x-dim); }
.cell.o.win { background: var(--o-dim); }
.cell.win .piece { animation: pulse 0.5s ease-in-out infinite alternate; }
.cell.doomed { background: rgba(255, 46, 77, 0.12); }
.cell.doomed::after {
  content: ""; position: absolute; inset: 10px; pointer-events: none;
  box-shadow: inset 0 0 0 2px var(--danger);
}
.cell.removing .piece { animation: shatter 0.55s forwards ease-in; }
.cell.survivor .piece { animation: survive 0.9s ease-out; }
.cell.survivor::after {
  content: "SURVIVOR"; position: absolute; top: 6px; right: 6px;
  font: 700 9px/1 var(--mono); letter-spacing: 0.18em; padding: 4px 6px; color: #0a0a0a; background: var(--x);
}
.cell.o.survivor::after { background: var(--o); }

@keyframes drop { from { transform: scale(0.4) rotate(-20deg); opacity: 0; } }
@keyframes pulse { to { transform: scale(1.08); } }
@keyframes shatter {
  40% { transform: scale(1.15); filter: brightness(2) drop-shadow(0 0 16px var(--danger)); }
  to { transform: scale(0.2) rotate(30deg); opacity: 0; }
}
@keyframes survive {
  0% { transform: scale(1.3); filter: brightness(2.2); }
  100% { transform: scale(1); }
}

.banner {
  min-height: 52px; width: var(--size, min(100%, 480px)); max-width: 480px;
  display: flex; align-items: center; justify-content: center; text-align: center;
  font: 700 16px/1.3 var(--display); letter-spacing: 0.1em; text-transform: uppercase;
  padding: 10px 16px; color: var(--muted);
  background: var(--panel); box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.banner.x { color: #0a0a0a; background: var(--x); box-shadow: none; }
.banner.o { color: #0a0a0a; background: var(--o); box-shadow: none; }
.banner.draw { color: var(--ink); box-shadow: inset 0 0 0 1px var(--danger); }
.banner.flash { animation: flash 0.35s ease-out; }
@keyframes flash { from { transform: scale(1.04); filter: brightness(1.4); } }

.hint { margin: 0; color: var(--muted); font-size: 13px; text-align: center; }
kbd {
  font: 600 11px var(--mono); padding: 2px 6px; color: var(--ink);
  background: var(--panel-2); box-shadow: inset 0 0 0 1px var(--line-2);
}

/* ───────── Side panels ───────── */
.panel {
  background: var(--panel); padding: 18px;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  box-shadow: inset 0 0 0 1px var(--line);
}
.panel-title {
  margin: 0 0 12px; font: 700 12px/1 var(--mono); letter-spacing: 0.24em; text-transform: uppercase; color: var(--muted);
  display: flex; align-items: center; gap: 8px;
}
.panel-title::before { content: ""; width: 8px; height: 8px; background: var(--x); transform: skewX(-18deg); }

.log { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-height: 320px; overflow-y: auto; }
.log li {
  display: grid; grid-template-columns: 44px 1fr; gap: 10px; align-items: baseline;
  font: 400 12px/1.4 var(--mono); padding: 8px 10px; background: var(--bg-2);
  border-left: 3px solid var(--line-2);
}
.log li.x { border-left-color: var(--x); }
.log li.o { border-left-color: var(--o); }
.log li.d { border-left-color: var(--danger); }
.log li.empty { display: block; color: var(--muted); border-left-color: transparent; }
.log .r { font-weight: 800; color: var(--muted); }
.log .what b.x { color: var(--x); }
.log .what b.o { color: var(--o); }
.log .what b.d { color: var(--danger); }

.legend ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.legend li { font-size: 13px; line-height: 1.45; color: var(--muted); }
.legend li b { display: block; color: var(--ink); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; }
.hl-x { color: var(--x) !important; }
.hl-o { color: var(--o) !important; }
.mini-tag { font: 700 10px var(--mono); padding: 1px 4px; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line-2); }

/* ───────── Dialogs ───────── */
.modal {
  border: 0; padding: 0; background: transparent; color: var(--ink);
  width: min(460px, calc(100vw - 32px)); max-height: calc(100vh - 32px);
}
.modal::backdrop { background: rgba(5, 5, 8, 0.78); backdrop-filter: blur(4px); }
.modal[open] { animation: rise 0.22s ease-out; }
@keyframes rise { from { transform: translateY(12px); opacity: 0; } }
.modal-body {
  background: var(--panel); padding: 28px;
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
  box-shadow: inset 0 0 0 1px var(--line-2);
  display: flex; flex-direction: column; gap: 18px;
}
.modal-body.center { align-items: center; text-align: center; }
.kicker { margin: 0; font: 600 11px/1 var(--mono); letter-spacing: 0.26em; text-transform: uppercase; color: var(--x); }
.modal-title { margin: -8px 0 0; font-size: 30px; letter-spacing: 0.04em; text-transform: uppercase; }

fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
fieldset[disabled] { opacity: 0.35; }
legend { padding: 0; margin-bottom: 8px; font: 600 11px/1 var(--mono); letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted); }
.seg { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg.three { grid-template-columns: repeat(3, 1fr); }
.seg label { position: relative; cursor: pointer; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span {
  display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; height: 100%;
  background: var(--bg-2); box-shadow: inset 0 0 0 1px var(--line);
  font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: box-shadow 0.15s, color 0.15s;
}
.seg.three span { align-items: center; }
.seg span b { font: 800 22px/1 var(--mono); color: var(--ink); }
.seg span small { font: 400 11px/1.3 var(--mono); letter-spacing: 0.04em; text-transform: none; color: var(--muted); }
.seg input:checked + span { box-shadow: inset 0 0 0 2px var(--x); color: var(--ink); background: linear-gradient(135deg, var(--x-dim), var(--bg-2) 70%); }
.seg input:checked + span b { color: var(--x); }
.seg input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 2px; }

.rules { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 10px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.rules b { color: var(--ink); }
.rules li::marker { color: var(--x); font-family: var(--mono); font-weight: 800; }

.winner-glyph { width: 96px; height: 96px; }
.winner-glyph svg { width: 100%; height: 100%; animation: survive 0.9s ease-out; }
.winner-glyph.x { color: var(--x); filter: drop-shadow(0 0 24px rgba(198, 255, 0, 0.5)); }
.winner-glyph.o { color: var(--o); filter: drop-shadow(0 0 24px rgba(255, 90, 31, 0.5)); }
.final { margin: -6px 0 0; font: 600 14px/1.5 var(--mono); color: var(--muted); }
.row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }

/* ───────── Responsive ───────── */
@media (max-width: 900px) {
  .arena { grid-template-columns: 1fr; grid-template-areas: "hud" "board" "side"; }
}
@media (max-width: 640px) {
  .tag, .wide-only { display: none; }
  .wordmark { font-size: 15px; letter-spacing: 0.04em; }
  .crest { width: 28px; height: 28px; }
  .player-card.active::after { display: none; }
  .topbar { gap: 10px; }
  .hud { grid-template-columns: 1fr 1fr; }
  .round-box { grid-column: 1 / -1; grid-row: 1; flex-direction: row; flex-wrap: wrap; min-width: 0; gap: 10px 14px; }
  .player-card { padding: 12px 14px; column-gap: 10px; }
  .player-card .glyph { width: 32px; height: 32px; }
  .player-card .name { font-size: 14px; }
  .player-card .score { font-size: 32px; }
  .player-card .label { display: none; }
  .player-card .glyph { grid-row: 1 / 3; }
  .player-card .name { grid-row: 1 / 3; }
  .board { gap: 6px; padding: 6px; }
  .cell .coord { display: none; }
}
@media (max-width: 380px) {
  .topbar-actions .btn { padding: 9px 10px; letter-spacing: 0.06em; }
  .wordmark { font-size: 13px; }
  .brand { gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition: none !important; }
}