:root {
  --bg: #0e1014;
  --panel: #161920;
  --panel-2: #1d212a;
  --line: #2a2f3a;
  --line-strong: #5b6273;
  --ink: #e7e9ee;
  --muted: #8b91a1;
  --accent: #7ee787;
  --accent-ink: #0b1a0e;
  --danger: #ff7b72;
  --sel: rgba(126, 231, 135, .18);
  --peer: rgba(255, 255, 255, .045);
  --same: rgba(126, 231, 135, .10);
  --p0: #79c0ff; --p1: #ff7b72; --p2: #d2a8ff; --p3: #ffa657;
  --p4: #56d4dd; --p5: #f778ba; --p6: #e3b341; --p7: #a5d6a7;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 10px;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f4ef;
    --panel: #ffffff;
    --panel-2: #f0efe9;
    --line: #dddbd2;
    --line-strong: #8f8c80;
    --ink: #1b1d22;
    --muted: #6b6e76;
    --accent: #1a7f37;
    --accent-ink: #ffffff;
    --danger: #cf222e;
    --sel: rgba(26, 127, 55, .16);
    --peer: rgba(0, 0, 0, .035);
    --same: rgba(26, 127, 55, .09);
    --p0: #0969da; --p1: #cf222e; --p2: #8250df; --p3: #bc4c00;
    --p4: #0f7b84; --p5: #bf3989; --p6: #9a6700; --p7: #2f7d32;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 var(--sans);
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
h2 { font-size: 13px; font-weight: 600; letter-spacing: .02em; margin: 0 0 12px; color: var(--muted); font-family: var(--mono); }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }
kbd { font: 11px var(--mono); color: var(--muted); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }

/* prompt / brand */
.prompt { font-family: var(--mono); font-size: clamp(28px, 7vw, 44px); font-weight: 600; margin: 0; letter-spacing: -.02em; }
.prompt.small { font-size: 15px; font-weight: 600; letter-spacing: 0; }
.sigil { color: var(--accent); margin-right: .35em; }
.caret { display: inline-block; width: .55em; height: 1em; background: var(--accent); margin-left: .12em; vertical-align: -.12em; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.tag { color: var(--muted); margin: 10px 0 0; max-width: 46ch; }

/* cards, buttons, inputs */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card.tight { padding: 14px; }
.btn {
  font: 600 14px var(--sans); color: var(--ink); background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; cursor: pointer;
  transition: background .12s, border-color .12s, transform .06s;
}
.btn:hover { border-color: var(--line-strong); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn.ghost { background: transparent; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

input[type=text], input:not([type]), .code-input {
  width: 100%; font: 16px var(--mono); color: var(--ink); background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
}
input:focus { outline: none; border-color: var(--accent); }
.code-input { text-transform: uppercase; letter-spacing: .3em; text-align: center; }

.field { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 12px; }
.field span { font-family: var(--mono); color: var(--accent); }

.seg { display: flex; gap: 4px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 3px; }
.seg label { flex: 1; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: block; text-align: center; font: 13px var(--mono); padding: 7px 0; border-radius: 6px; cursor: pointer; color: var(--muted); }
.seg input:checked + span { background: var(--panel); color: var(--ink); box-shadow: 0 0 0 1px var(--line); }
.seg input:focus-visible + span { outline: 2px solid var(--accent); }

.error { color: var(--danger); font-family: var(--mono); font-size: 13px; min-height: 1.4em; }

/* lobby */
.lobby { max-width: 640px; margin: 0 auto; padding: max(48px, 10vh) 16px 48px; display: grid; gap: 16px; }
.brand { margin-bottom: 12px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.split .card { display: grid; gap: 12px; align-content: start; }
@media (max-width: 560px) { .split { grid-template-columns: 1fr; } }

/* game */
.game { max-width: 1060px; margin: 0 auto; padding: 14px 16px 32px; }
.topbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 16px; }
.room { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip { font: 13px var(--mono); color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; }
button.chip { cursor: pointer; }
button.chip:hover { border-color: var(--line-strong); }
#roomCode { letter-spacing: .12em; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.dot.off { background: var(--danger); box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 22%, transparent); animation: blink 1s steps(1) infinite; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 20px; align-items: start; }
@media (max-width: 860px) { .layout { grid-template-columns: 1fr; } }
.play { display: grid; gap: 14px; justify-items: center; }

.board {
  --size: min(100%, 560px, calc(100dvh - 230px));
  width: var(--size); min-width: 288px; aspect-ratio: 1;
  display: grid; grid-template-columns: repeat(9, 1fr); grid-template-rows: repeat(9, 1fr);
  background: var(--panel); border: 2px solid var(--line-strong); border-radius: 8px; overflow: hidden;
  user-select: none; touch-action: manipulation;
}
@media (max-width: 860px) { .board { --size: min(100%, 560px); } }
.cell {
  position: relative; display: grid; place-items: center; padding: 0;
  border: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: transparent; color: var(--ink); cursor: pointer;
  font: 500 clamp(18px, 4.6vw, 30px) var(--mono);
}
.cell:nth-child(9n) { border-right: 0; }
.cell:nth-child(9n+3), .cell:nth-child(9n+6) { border-right: 2px solid var(--line-strong); }
.cell:nth-child(n+19):nth-child(-n+27), .cell:nth-child(n+46):nth-child(-n+54) { border-bottom: 2px solid var(--line-strong); }
.cell:nth-child(n+73) { border-bottom: 0; }
.cell:focus { outline: none; }
.cell.peer { background: var(--peer); }
.cell.same { background: var(--same); }
.cell.sel { background: var(--sel); box-shadow: inset 0 0 0 2px var(--accent); }
.cell.given { font-weight: 700; }
.cell.owned { color: var(--pc); font-weight: 600; }
.cell.owned::after { content: ""; position: absolute; inset: 0; background: var(--pc); opacity: .08; pointer-events: none; }
.cell.fresh { animation: pop .45s ease-out; }
.cell.miss { animation: shake .35s; background: color-mix(in srgb, var(--danger) 25%, transparent); }
.cell.ghost-miss::before { content: ""; position: absolute; inset: 3px; border: 2px solid var(--pc); border-radius: 4px; opacity: 0; animation: ping .7s ease-out; pointer-events: none; }
@keyframes pop { 0% { transform: scale(.4); } 70% { transform: scale(1.12); } 100% { transform: scale(1); } }
@keyframes shake { 20%, 60% { transform: translateX(-3px); } 40%, 80% { transform: translateX(3px); } }
@keyframes ping { 0% { opacity: .9; } 100% { opacity: 0; transform: scale(1.15); } }

.notes { position: absolute; inset: 2px; display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr); pointer-events: none; }
.notes span { display: grid; place-items: center; font: clamp(8px, 1.6vw, 11px) var(--mono); color: var(--muted); }

.c0 { --pc: var(--p0); } .c1 { --pc: var(--p1); } .c2 { --pc: var(--p2); } .c3 { --pc: var(--p3); }
.c4 { --pc: var(--p4); } .c5 { --pc: var(--p5); } .c6 { --pc: var(--p6); } .c7 { --pc: var(--p7); }
.cx { --pc: var(--muted); }

.pad { width: var(--size, 100%); max-width: 560px; width: 100%; display: grid; gap: 10px; }
.digits { display: grid; grid-template-columns: repeat(9, 1fr); gap: 6px; }
.digit { position: relative; font: 600 20px var(--mono); padding: 12px 0 14px; }
.digit small { position: absolute; bottom: 2px; left: 0; right: 0; font: 10px var(--mono); color: var(--muted); }
.digit.done { opacity: .3; }
.notes-on .digit { color: var(--muted); font-size: 15px; }
.tools { display: flex; gap: 8px; }
.tool { flex: 1; display: flex; gap: 8px; justify-content: center; align-items: center; font-family: var(--mono); font-weight: 500; font-size: 13px; }
.tool[aria-pressed=true] { border-color: var(--accent); color: var(--accent); }
.lock { margin: 0; min-height: 1.4em; text-align: center; font: 13px var(--mono); color: var(--danger); }
.locked .digit { opacity: .35; pointer-events: none; }

.side { display: grid; gap: 14px; }
.players { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.players li { display: grid; grid-template-columns: 10px 1fr auto; align-items: center; gap: 10px; padding: 6px 8px; border-radius: 6px; }
.players li.me { background: var(--panel-2); }
.players li.offline { opacity: .45; }
.swatch { width: 10px; height: 10px; border-radius: 3px; background: var(--pc); }
.pname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pname .role { font: 11px var(--mono); color: var(--accent); margin-left: 6px; }
.pname .you { font: 11px var(--mono); color: var(--muted); margin-left: 6px; }
.pscore { font: 600 14px var(--mono); font-variant-numeric: tabular-nums; }
.pwins { font: 11px var(--mono); color: var(--muted); margin-left: 6px; }

.term { background: color-mix(in srgb, var(--panel) 60%, var(--bg)); }
.log { list-style: none; margin: 0; padding: 0; font: 12px/1.6 var(--mono); max-height: 240px; overflow: auto; display: flex; flex-direction: column-reverse; }
.log li { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.log .who { color: var(--pc); }
.log .ok { color: var(--accent); }
.log .bad { color: var(--danger); }

.overlay { position: fixed; inset: 0; display: grid; place-items: center; padding: 16px; background: color-mix(in srgb, var(--bg) 70%, transparent); backdrop-filter: blur(4px); z-index: 10; }
.modal { width: min(420px, 100%); display: grid; gap: 14px; box-shadow: 0 20px 60px rgba(0,0,0,.35); }
.modal h2 { font: 600 22px var(--sans); color: var(--ink); margin: 0; }
.final li { padding: 8px; }
#hostControls { display: grid; gap: 10px; }

.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translate(-50%, 20px); opacity: 0;
  background: var(--ink); color: var(--bg); font: 13px var(--mono); padding: 9px 14px; border-radius: 8px;
  transition: opacity .2s, transform .2s; pointer-events: none; z-index: 20; max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}