:root {
  --bg: #f6f1e8; --card: #fffdf9; --ink: #221f1a; --muted: #756c60; --line: #e5dccd;
  --accent: #b5651d; --accent-ink: #fff; --danger: #a33a2a;
  --light: #f0d9b5; --dark: #b58863;
  --mark-last: rgba(255, 210, 60, .45); --mark-sel: rgba(70, 130, 255, .45); --mark-check: rgba(220, 40, 40, .55);
  --mark-pending: rgba(255, 140, 0, .55); --hint: rgba(20, 20, 20, .28); --coord-light: #b58863; --coord-dark: #f0d9b5;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1f1d1a; --card: #2a2723; --ink: #efe9df; --muted: #a79d8f; --line: #3b3630; --accent: #d98a3d; --hint: rgba(255, 255, 255, .35); }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { color-scheme: light dark; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; -webkit-tap-highlight-color: transparent; }
a { color: var(--accent); }
.top { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; padding: 12px 16px; padding-top: max(12px, env(safe-area-inset-top)); }
.brand { font-weight: 700; white-space: nowrap; text-decoration: none; color: var(--ink); font-size: 18px; }
.title { color: var(--muted); }
.layout { display: grid; gap: 16px; padding: 0 12px 32px; max-width: 1100px; margin: 0 auto; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .layout { grid-template-columns: minmax(320px, 620px) minmax(280px, 1fr); align-items: start; padding: 0 16px 32px; } }

/* board */
.board-col { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.board-wrap { position: relative; width: 100%; }
.board { width: 100%; height: auto; display: block; border-radius: 6px; overflow: hidden; box-shadow: 0 4px 20px rgba(0, 0, 0, .15); touch-action: manipulation; user-select: none; -webkit-user-select: none; cursor: pointer; }
.sq.light { fill: var(--light); }
.sq.dark { fill: var(--dark); }
.mark.last { fill: var(--mark-last); }
.mark.selected { fill: var(--mark-sel); }
.mark.check { fill: var(--mark-check); }
.mark.pending { fill: var(--mark-pending); }
.hint { pointer-events: none; }
.hint.dot { fill: var(--hint); }
.hint.capture { fill: none; stroke: var(--hint); stroke-width: 4; }
.hint.ring { fill: none; stroke: var(--hint); stroke-width: 1.5; stroke-dasharray: 3 3; }
.piece { pointer-events: none; }
.coord { font-size: 8px; font-weight: 600; pointer-events: none; font-family: inherit; }
.coord.on-light { fill: var(--coord-light); }
.coord.on-dark { fill: var(--coord-dark); }
.dim { fill: rgba(0, 0, 0, .18); pointer-events: none; }
.board.reviewing { outline: 3px dashed var(--accent); outline-offset: -3px; }
.promo { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 8px; background: rgba(0, 0, 0, .45); border-radius: 6px; z-index: 2; }
.promo-piece { width: 18%; aspect-ratio: 1; background: var(--card); border: 2px solid var(--line); border-radius: 8px; padding: 4px; cursor: pointer; }
.promo-piece:hover { border-color: var(--accent); }
.promo-piece svg { width: 100%; height: 100%; display: block; }

/* confirm-before-send bar */
.confirm-bar { display: flex; align-items: center; gap: 10px; padding: 10px 12px; background: var(--card); border: 2px solid var(--accent); border-radius: 10px; }
.confirm-bar span { flex: 1; font-weight: 600; }
.confirm-bar button { padding: 12px 18px; font-size: 17px; min-width: 96px; }

/* player bars + status */
.player-bar { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 12px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; }
.player-bar.active { border-color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.player-bar .name { font-weight: 600; }
.player-bar .meta { color: var(--muted); font-size: 14px; text-align: right; }
.status { text-align: center; color: var(--muted); min-height: 1.4em; }

/* panel */
.panel { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.card h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 8px; }
.card p { margin: 0 0 10px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.row.nowrap { flex-wrap: nowrap; }
button, .button { font: inherit; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; text-decoration: none; line-height: 1.2; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
button.danger { color: var(--danger); border-color: var(--danger); }
button:disabled { opacity: .4; cursor: default; }
input { font: inherit; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); width: 100%; min-width: 0; }
label { display: block; margin-bottom: 8px; }
.confirm { margin-top: 8px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.moves { list-style: none; margin: 0; padding: 0; max-height: 220px; overflow: auto; display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 2px 8px; counter-reset: mv; }
.moves li { display: flex; gap: 4px; align-items: center; counter-increment: mv; }
.moves li::before { content: counter(mv) "."; color: var(--muted); width: 2.2em; font-variant-numeric: tabular-nums; flex: none; }
.san { padding: 2px 6px; border: none; background: transparent; font-variant-numeric: tabular-nums; }
.san.current { background: var(--accent); color: var(--accent-ink); border-radius: 4px; }
.badge { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #e33; margin-left: 6px; vertical-align: middle; }
.chat { list-style: none; margin: 0 0 8px; padding: 0; max-height: 220px; overflow: auto; display: flex; flex-direction: column; gap: 4px; }
.chat li { display: flex; gap: 6px; }
.chat li b { color: var(--muted); font-weight: 600; white-space: nowrap; }
.chat li span { overflow-wrap: anywhere; }
.settings { display: flex; flex-direction: column; gap: 10px; }
.toggle { display: flex; gap: 8px; align-items: center; margin: 0; cursor: pointer; }
.toggle input { width: auto; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 999px; box-shadow: 0 4px 16px rgba(0, 0, 0, .3); z-index: 10; max-width: 90vw; }

/* home */
.home { max-width: 720px; margin: 0 auto; padding: 0 12px 32px; display: flex; flex-direction: column; gap: 16px; }
.games { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.games a { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 14px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; text-decoration: none; color: var(--ink); }
.games a.yours { border-color: var(--accent); box-shadow: inset 3px 0 0 var(--accent); }
.games .pill { font-size: 13px; padding: 2px 8px; border-radius: 999px; background: var(--bg); color: var(--muted); white-space: nowrap; }
.games a.yours .pill { background: var(--accent); color: var(--accent-ink); }
.segmented { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.segmented label { margin: 0; }
.segmented input { display: none; }
.segmented span { display: inline-block; padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; cursor: pointer; }
.segmented input:checked + span { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.field-label { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .06em; margin: 12px 0 6px; }