:root {
  --bg: #0d0e12;
  --panel-bg: #1c1f28;
  --panel-border: #2a2e3a;
  --fg: #e8e8ec;
  --fg-dim: #9a9aa5;
  --accent: #d88a3f;
  --live: #7ee787;
  --check: #ff6b6b;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

header.top {
  background: var(--panel-bg);
  border-bottom: 1px solid var(--panel-border);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

header.top h1 {
  margin: 0;
  font-size: 1.2rem;
  color: var(--accent);
}

#home-link {
  font-size: 0.85rem;
  color: var(--fg-dim);
  text-decoration: none;
}

#fullscreen-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--fg);
  font-size: 15px;
  line-height: 30px;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
}

#home-link:hover {
  color: var(--accent);
}

nav.rooms {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-top: 4px;
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.panel h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  white-space: nowrap;
}

.badge-live {
  background: rgba(126, 231, 135, 0.15);
  color: var(--live);
  border-color: var(--live);
}

.badge-real {
  background: rgba(216, 138, 63, 0.15);
  color: var(--accent);
  border-color: var(--accent);
}

.badge-own {
  background: rgba(154, 154, 165, 0.15);
  color: var(--fg-dim);
  border-color: var(--fg-dim);
}

.badge-sim {
  background: rgba(88, 140, 220, 0.15);
  color: #8cb4ff;
  border-color: #8cb4ff;
}

select, button, input {
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 6px 10px;
}

select, input, textarea {
  font-size: 16px;
}

button {
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

.hidden {
  display: none !important;
}

.problem-group-heading {
  margin: 12px 0 4px;
  font-size: 0.95rem;
  color: var(--fg-dim);
}

.problem-group-heading:first-child {
  margin-top: 0;
}

.problem-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

footer.home-link {
  margin-top: 24px;
  font-size: 0.85rem;
}

/* --- 盤 --- */

.board-area {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.shogi-board {
  max-width: 480px;
  background: #e8c99a;
}

.sq {
  fill: transparent;
  cursor: pointer;
}

.sq-selected {
  fill: rgba(216, 138, 63, 0.45);
}

.sq-legal {
  fill: rgba(126, 231, 135, 0.35);
}

.sq-check {
  fill: rgba(255, 107, 107, 0.45);
}

.grid-line {
  stroke: #6b4a2a;
  stroke-width: 1;
}

.piece {
  font-size: 28px;
  fill: #1a1a1a;
  pointer-events: none;
  user-select: none;
}

.piece-w {
  fill: #1a1a1a;
}

.hand-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
  min-height: 2.2em;
}

.hand-piece {
  padding: 4px 8px;
}

.hand-piece.selected {
  border-color: var(--accent);
  background: rgba(216, 138, 63, 0.25);
}

/* --- 評価値・思考パネル --- */

.think-panel {
  min-width: 220px;
  flex: 1;
}

.evalbar {
  width: 28px;
  height: 200px;
  background: #222;
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.evalbar-fill {
  width: 100%;
  background: #e8e8ec;
  transition: height 0.2s ease;
}

.evalbar-label {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--fg-dim);
}

.info-stats {
  display: grid;
  grid-template-columns: auto auto;
  gap: 2px 10px;
  font-size: 0.82rem;
  margin: 8px 0;
}

.info-stats dt {
  color: var(--fg-dim);
}

.info-stats dd {
  margin: 0;
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
}

.pv-line {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 0.85rem;
  word-break: break-all;
  white-space: pre-wrap;
}

.status-line {
  font-size: 0.9rem;
  color: var(--fg-dim);
  min-height: 1.4em;
}

/* little-bit: focus-visible(2026-08-29追加)
   キーボード操作でいまどこにいるかが見えないアプリが24中20あった
   (サイト品質棚卸し B-5)。:where() で詳細度0にしてあるので、
   個別に focus スタイルを持つ要素はそちらが勝つ。
   色はサイト共通のアクセント(#e8825a)。明るい地でも暗い地でも見える。 */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid #e8825a;
  outline-offset: 2px;
}