:root {
  color-scheme: light;
  --motion-scale: 1;
  --bg: #eef2f3;
  --ink: #1f2933;
  --muted: #637083;
  --panel: #ffffff;
  --line: #cad4df;
  --cell: #d9e2ea;
  --cell-top: #f7fafc;
  --cell-open: #f4f1ea;
  --brand: #206a7b;
  --brand-dark: #154a56;
  --accent: #d24b3c;
  --gold: #c58518;
  --green: #2d7d46;
  --shadow: 0 18px 45px rgba(22, 34, 51, 0.14);
  /* 次要颜色变量 */
  --surface-bg: rgba(255, 255, 255, 0.9);
  --topbar-bg: rgba(255, 255, 255, 0.62);
  --stats-bg: #eef5f6;
  --stats-border: #c8dde2;
  --segment-bg: #dfe8ee;
  --toggle-bg: #e9f3ed;
  --toggle-border: #bad6c5;
  --board-bg: #9aaaba;
  --board-border: #7e8d9b;
  --cell-border: #9cadba;
  --cell-open-border: #cec5b6;
  --surface-border: rgba(202, 212, 223, 0.8);
  font-family:
    "Segoe UI",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1a1d23;
  --ink: #e2e8f0;
  --muted: #94a3b8;
  --panel: #23272f;
  --line: #334155;
  --cell: #2d3748;
  --cell-top: #374151;
  --cell-open: #1f2937;
  --brand: #67e8f9;
  --brand-dark: #22d3ee;
  --accent: #f87171;
  --gold: #fbbf24;
  --green: #4ade80;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  --surface-bg: rgba(35, 39, 47, 0.92);
  --topbar-bg: rgba(35, 39, 47, 0.6);
  --stats-bg: #1e293b;
  --stats-border: #334155;
  --segment-bg: #1e293b;
  --toggle-bg: #1e293b;
  --toggle-border: #334155;
  --board-bg: #374151;
  --board-border: #4b5563;
  --cell-border: #4b5563;
  --cell-open-border: #4b5563;
  --surface-border: rgba(75, 85, 99, 0.8);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(32, 106, 123, 0.16), transparent 38%),
    linear-gradient(315deg, rgba(210, 75, 60, 0.13), transparent 42%),
    var(--bg);
  color: var(--ink);
}

button,
input {
  font: inherit;
}

.shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  width: min(1180px, calc(100vw - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 28px 0;
  align-items: stretch;
}

.game-surface,
.side-panel > div {
  background: var(--surface-bg);
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow);
}

.game-surface {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-radius: 8px;
  overflow: hidden;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px;
  border-bottom: 1px solid var(--line);
  background: var(--topbar-bg);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--brand);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.7rem, 2.8vw, 2.6rem);
}

h2 {
  font-size: 1.05rem;
}

.stats {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  white-space: nowrap;
}

.stats span,
.icon-text,
.toggle,
.segment {
  min-height: 40px;
  border-radius: 7px;
}

.stats span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  background: var(--stats-bg);
  border: 1px solid var(--stats-border);
}

.stats strong {
  color: var(--brand-dark);
  font-variant-numeric: tabular-nums;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
}

.segmented {
  display: inline-grid;
  grid-template-columns: repeat(3, minmax(64px, 1fr));
  padding: 3px;
  background: var(--segment-bg);
  border-radius: 8px;
}

.segment,
.icon-text {
  border: 0;
  cursor: pointer;
}

.segment {
  padding: 0 12px;
  color: var(--muted);
  background: transparent;
}

.segment.is-active {
  color: #fff;
  background: var(--brand);
}

.icon-text {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  color: #fff;
  background: var(--ink);
}

.icon-text span:first-child {
  font-size: 1.25rem;
  line-height: 1;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  color: var(--brand-dark);
  background: var(--toggle-bg);
  border: 1px solid var(--toggle-border);
}

.toggle input {
  width: 18px;
  height: 18px;
  accent-color: var(--green);
}

.board-wrap {
  display: grid;
  place-items: center;
  flex: 1;
  min-width: 0;
  min-height: 480px;
  padding: 22px;
  overflow: auto;
}

.board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-size));
  grid-template-rows: repeat(var(--rows), var(--cell-size));
  gap: 3px;
  padding: 8px;
  background: var(--board-bg);
  border: 2px solid var(--board-border);
  border-radius: 8px;
}

.board.is-shaking {
  animation: boardShake calc(0.42s * var(--motion-scale)) ease-in-out;
}

.cell {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  width: var(--cell-size);
  height: var(--cell-size);
  border: 1px solid var(--cell-border);
  border-radius: 5px;
  background:
    linear-gradient(145deg, var(--cell-top), var(--cell) 65%),
    var(--cell);
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  font-size: calc(var(--cell-size) * 0.48);
  line-height: 1;
  user-select: none;
}

.cell::after {
  content: "";
  position: absolute;
  inset: -4px;
  z-index: -1;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
}

.cell:hover:not(.is-open):not(.is-flagged) {
  filter: brightness(1.04);
}

.cell.is-open {
  background: var(--cell-open);
  border-color: var(--cell-open-border);
  cursor: default;
}

.cell.is-flagged {
  color: #fff;
  background: linear-gradient(145deg, #f06a54, var(--accent));
}

.cell.is-auto {
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.55);
}

.cell.is-influence-1 {
  background: linear-gradient(145deg, #dff5e5, #92d6a5);
  box-shadow: inset 0 0 0 2px rgba(45, 125, 70, 0.55);
}

.cell.is-influence-2 {
  background: linear-gradient(145deg, #dcefff, #83bdec);
  box-shadow: inset 0 0 0 2px rgba(36, 105, 178, 0.6);
}

.cell.is-influence-3 {
  background: linear-gradient(145deg, #eadfff, #b79be8);
  box-shadow: inset 0 0 0 2px rgba(91, 75, 170, 0.6);
}

.cell.is-influence-4 {
  background: linear-gradient(145deg, #fff0c2, #dfb34e);
  box-shadow: inset 0 0 0 2px rgba(197, 133, 24, 0.66);
}

.cell.is-influence-5 {
  background: linear-gradient(145deg, #ffd8cf, #e06555);
  box-shadow: inset 0 0 0 2px rgba(210, 75, 60, 0.7);
}

.cell[class*="is-influence-"] {
  animation: influenceRise calc(0.34s * var(--motion-scale)) ease-out;
}

.cell.is-proof-number {
  animation: proofNumberPulse calc(0.42s * var(--motion-scale)) ease-out;
  box-shadow:
    inset 0 0 0 2px rgba(197, 133, 24, 0.85),
    0 0 0 4px rgba(197, 133, 24, 0.2);
}

.cell.is-proof-number::after {
  animation: proofHalo calc(0.42s * var(--motion-scale)) ease-out;
  border: 2px solid rgba(197, 133, 24, 0.95);
}

.cell.is-proof-target {
  animation: proofTargetSnap calc(0.72s * var(--motion-scale)) ease-out;
}

.cell.is-proof-target::after {
  z-index: 0;
  animation: targetRing calc(0.72s * var(--motion-scale)) ease-out;
  border: 3px solid rgba(210, 75, 60, 0.92);
}

.cell.is-direct-hint-number {
  background: #fff4cf;
  box-shadow:
    inset 0 0 0 2px rgba(197, 133, 24, 0.8),
    0 0 0 3px rgba(197, 133, 24, 0.16);
}

.cell.is-direct-hint-cell {
  animation: directHintBeat calc(1.2s * var(--motion-scale)) ease-in-out infinite;
  background: linear-gradient(145deg, #ffe3dc, #ee8b7e);
  box-shadow:
    inset 0 0 0 2px rgba(210, 75, 60, 0.78),
    0 0 0 3px rgba(210, 75, 60, 0.15);
}

.cell.is-mine {
  color: #fff;
  background: #202733;
}

.n1 { color: #2469b2; }
.n2 { color: #2d7d46; }
.n3 { color: #c43f35; }
.n4 { color: #5b4baa; }
.n5 { color: #9b3b28; }
.n6 { color: #16807e; }
.n7 { color: #2f3440; }
.n8 { color: #6b7280; }

@keyframes proofNumberPulse {
  0% { transform: scale(1); }
  28% {
    transform: scale(1.12);
    background: #fff4cf;
  }
  70% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

@keyframes influenceRise {
  0% {
    transform: scale(0.96);
    filter: brightness(0.96);
  }
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
}

@keyframes proofHalo {
  0% {
    opacity: 0;
    transform: scale(0.7);
  }
  32% {
    opacity: 1;
    transform: scale(1.25);
  }
  100% {
    opacity: 0;
    transform: scale(1.75);
  }
}

@keyframes proofTargetSnap {
  0% { transform: scale(0.92); }
  35% {
    transform: scale(1.16);
    filter: saturate(1.25);
  }
  68% { transform: scale(0.98); }
  100% { transform: scale(1); }
}

@keyframes targetRing {
  0% {
    opacity: 0;
    transform: scale(1.9);
  }
  38% {
    opacity: 1;
    transform: scale(0.86);
  }
  100% {
    opacity: 0;
    transform: scale(0.55);
  }
}

@keyframes directHintBeat {
  0%,
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.06);
    filter: brightness(1.06);
  }
}

.side-panel {
  display: grid;
  gap: 16px;
  align-content: start;
}

.side-panel > div {
  border-radius: 8px;
  padding: 18px;
}

.status-card h2 {
  margin-bottom: 10px;
  font-size: 1.45rem;
}

.status-card p:last-child,
.rule-list li,
.log-panel li {
  color: var(--muted);
  line-height: 1.55;
}

.rule-list ul,
.log-panel ol {
  margin: 12px 0 0;
  padding-left: 20px;
}

.log-panel ol {
  display: grid;
  gap: 10px;
  max-height: 340px;
  overflow: auto;
}

.log-panel li strong {
  color: var(--brand-dark);
}

.combo-celebration {
  position: absolute;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}

.combo-toast {
  position: absolute;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  padding: 10px 18px;
  border-radius: 8px;
  background: rgba(31, 41, 51, 0.9);
  color: #fff;
  box-shadow: 0 14px 32px rgba(31, 41, 51, 0.28);
  font-weight: 900;
  letter-spacing: 0;
  animation: comboToast calc(1.55s * var(--motion-scale)) ease-out forwards;
}

.combo-toast span {
  display: block;
  color: #ffd36b;
  font-size: 0.78rem;
  text-align: center;
}

.firework {
  position: absolute;
  bottom: 30px;
  width: 8px;
  height: 8px;
}

.firework-left {
  left: 34px;
}

.firework-right {
  right: 34px;
}

.firework span {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--spark);
  opacity: 0;
  animation: fireworkSpark calc(1.25s * var(--motion-scale)) ease-out forwards;
}

.firework span:nth-child(3n) {
  animation-delay: 0.08s;
}

.firework span:nth-child(4n) {
  animation-delay: 0.14s;
}

@media (max-width: 900px) {
  .shell {
    grid-template-columns: 1fr;
    padding: 16px 0;
  }

  .topbar {
    flex-direction: column;
  }

  .stats {
    flex-wrap: wrap;
  }

  .board-wrap {
    min-height: auto;
    justify-content: start;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100vw - 20px, 1180px);
  }

  .controls,
  .topbar,
  .board-wrap {
    padding-left: 14px;
    padding-right: 14px;
  }

  .segmented {
    width: 100%;
  }

  .topbar {
    padding: 14px;
    gap: 8px;
  }

  h1 {
    font-size: 1.3rem;
  }

  .controls {
    padding: 10px 14px;
    gap: 8px;
  }

  .stats span {
    padding: 6px 8px;
    font-size: 0.85rem;
  }

  .side-panel {
    gap: 12px;
  }

  .status-card,
  .rule-list,
  .log-panel {
    padding: 14px;
  }

  .status-card h2,
  .rule-list h2,
  .log-panel h2 {
    font-size: 1rem;
  }
}

@keyframes comboToast {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(18px) scale(0.86);
  }
  18% {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1.06);
  }
  76% {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(-18px) scale(0.96);
  }
}

@keyframes fireworkSpark {
  0% {
    opacity: 1;
    transform: translate(0, 0) scale(0.6);
  }
  58% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) scale(0.1);
  }
}

@keyframes boardShake {
  0%,
  100% {
    transform: translate(0, 0);
  }
  18% {
    transform: translate(-5px, 2px);
  }
  36% {
    transform: translate(5px, -2px);
  }
  54% {
    transform: translate(-4px, -1px);
  }
  72% {
    transform: translate(4px, 1px);
  }
}