:root {
  --accent: #00e5ff;
  --accent2: #ff3df5;
  --gold: #ffd66e;
  --text: #f2f6ff;
  --text-dim: rgba(242, 246, 255, 0.72);
  --panel: rgba(10, 16, 38, 0.62);
  --panel-border: rgba(255, 255, 255, 0.16);
  --glow: 0 0 18px rgba(0, 229, 255, 0.35);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #05060f;
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
  user-select: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  color: inherit;
  background: none;
}

#gameCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#ui {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}

#ui > .screen {
  pointer-events: auto;
}

.hidden {
  display: none !important;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 封面 ---------- */
#cover {
  background: radial-gradient(ellipse at center, rgba(8, 12, 40, 0.25), rgba(3, 4, 12, 0.55));
}

.cover-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  padding: 24px;
  text-align: center;
  animation: cover-in 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes cover-in {
  from {
    opacity: 0;
    transform: translateY(26px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.title-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.title-kicker {
  font-size: 13px;
  letter-spacing: 0.55em;
  color: var(--accent);
  text-shadow: 0 0 14px rgba(0, 229, 255, 0.8);
  animation: kicker-flicker 3.2s ease-in-out infinite;
}

@keyframes kicker-flicker {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}

.title {
  font-size: clamp(52px, 11vw, 96px);
  font-weight: 900;
  letter-spacing: 0.12em;
  background: linear-gradient(115deg, #7df9ff 0%, #00e5ff 30%, #ff3df5 65%, #ffd66e 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 26px rgba(0, 229, 255, 0.45)) drop-shadow(0 4px 14px rgba(0, 0, 0, 0.6));
  animation: title-flow 6s linear infinite;
}

@keyframes title-flow {
  from { background-position: 0% 0; }
  to { background-position: 220% 0; }
}

.subtitle {
  font-size: 14px;
  letter-spacing: 0.28em;
  color: var(--text-dim);
  text-shadow: 0 0 12px rgba(0, 0, 0, 0.6);
}

.cover-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.cover-actions {
  display: flex;
  justify-content: center;
}

.big-btn {
  position: relative;
  min-width: 216px;
  padding: 15px 34px;
  border-radius: 16px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  background: linear-gradient(135deg, rgba(30, 44, 92, 0.85), rgba(16, 22, 52, 0.9));
  border: 1px solid var(--panel-border);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: transform 0.18s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  overflow: hidden;
}

.big-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.22) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.6s ease;
}

.big-btn:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: rgba(0, 229, 255, 0.7);
  box-shadow: 0 12px 38px rgba(0, 0, 0, 0.5), 0 0 26px rgba(0, 229, 255, 0.3);
}

.big-btn:hover::after {
  transform: translateX(120%);
}

.big-btn:active {
  transform: translateY(-1px) scale(0.985);
}

.big-btn.primary {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.92), rgba(0, 120, 255, 0.92));
  border-color: rgba(160, 245, 255, 0.85);
  box-shadow: 0 10px 34px rgba(0, 200, 255, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.big-btn.primary:hover {
  box-shadow: 0 14px 44px rgba(0, 200, 255, 0.55), 0 0 30px rgba(0, 229, 255, 0.5);
}

.big-btn.small {
  min-width: 148px;
  padding: 12px 26px;
  font-size: 15px;
}

.ghost-btn {
  min-width: 108px;
  padding: 12px 22px;
  border-radius: 14px;
  font-size: 14px;
  color: var(--text-dim);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
  transition: all 0.2s ease;
}

.ghost-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.12);
}

/* 配置面板 */
.config {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 22px;
  border-radius: 18px;
  background: rgba(10, 16, 38, 0.74);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  animation: config-in 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes config-in {
  from { opacity: 0; transform: translateY(14px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.config-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.config-label {
  width: 56px;
  text-align: left;
  font-size: 14px;
  color: var(--text-dim);
}

.seg {
  display: flex;
  gap: 6px;
  padding: 4px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.seg button {
  padding: 8px 16px;
  border-radius: 9px;
  font-size: 13px;
  color: var(--text-dim);
  transition: all 0.2s ease;
}

.seg button:hover {
  color: var(--text);
}

.seg button.active {
  color: #04121a;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #4de3ff);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.5);
}

.config-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 4px;}

.range-val {
  min-width: 62px;
  text-align: right;
  font-size: 13px;
  color: var(--text);
}

input[type="range"] {
  flex: 1;
  min-width: 120px;
  accent-color: var(--accent);
  cursor: pointer;
}

.cover-footer {
  font-size: 12px;
  color: rgba(242, 246, 255, 0.5);
  letter-spacing: 0.1em;
}

.cover-footer .dot {
  margin: 0 8px;
  color: var(--accent);
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 18px;
  background: rgba(10, 16, 38, 0.6);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.2s ease;
}

.icon-btn:hover {
  transform: scale(1.08);
  border-color: rgba(0, 229, 255, 0.6);
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
}

.top-right {
  position: absolute;
  top: max(18px, env(safe-area-inset-top));
  right: 18px;
}

/* 浅色主题下的 HUD 适配 */
body[data-theme-light="1"] .chip-btn {
  background: rgba(255, 255, 255, 0.62);
  color: #4a3040;
  border-color: rgba(140, 90, 120, 0.4);
}

body[data-theme-light="1"] .chip-btn:hover {
  border-color: rgba(200, 90, 140, 0.7);
  box-shadow: 0 0 16px rgba(255, 134, 200, 0.45);
}

body[data-theme-light="1"] .chip-btn.on {
  color: #0d6b5c;
  border-color: rgba(30, 160, 140, 0.75);
  box-shadow: 0 0 14px rgba(30, 160, 140, 0.35);
}

body[data-theme-light="1"] .chip {
  background: rgba(255, 255, 255, 0.62);
  color: #4a3040;
  border-color: rgba(140, 90, 120, 0.4);
}

body[data-theme-light="1"] .turn-chip {
  color: #96365e;
  border-color: rgba(210, 100, 150, 0.55);
  box-shadow: 0 0 18px rgba(255, 134, 200, 0.35);
}

body[data-theme-light="1"] .theme-chip {
  color: rgba(80, 55, 75, 0.8);
}

body[data-theme-light="1"] .hint-chip {
  background: rgba(255, 255, 255, 0.55);
  color: rgba(80, 55, 75, 0.75);
  border-color: rgba(140, 90, 120, 0.3);
}

/* ---------- HUD ---------- */
#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hud-top {
  position: absolute;
  top: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  pointer-events: none;
}

.hud-left,
.hud-right,
.hud-center {
  display: flex;
  gap: 8px;
  pointer-events: auto;
}

.hud-center {
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.chip-btn {
  padding: 8px 14px;
  border-radius: 12px;
  font-size: 13px;
  color: var(--text);
  background: rgba(10, 16, 38, 0.62);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.2s ease;
}

.chip-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 229, 255, 0.6);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.3);
}

.chip-btn.on {
  color: #b9fff2;
  border-color: rgba(34, 255, 216, 0.7);
  box-shadow: 0 0 14px rgba(34, 255, 216, 0.35);
}

.chip {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.06em;
  background: rgba(10, 16, 38, 0.68);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
}

.turn-chip {
  min-width: 132px;
  text-align: center;
  color: #bdf4ff;
  border-color: rgba(0, 229, 255, 0.45);
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
}

.turn-chip.thinking {
  color: var(--gold);
  border-color: rgba(255, 214, 110, 0.55);
  box-shadow: 0 0 18px rgba(255, 214, 110, 0.3);
  animation: think-pulse 0.9s ease-in-out infinite;
}

@keyframes think-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.62; }
}

.theme-chip {
  color: var(--text-dim);
  font-size: 12px;
}

.hud-bottom {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: max(14px, env(safe-area-inset-bottom));
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
  pointer-events: none;
}

.hud-bottom-right {
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.hud-bottom .chip-btn {
  pointer-events: auto;
}

.combo-chip {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  color: var(--gold);
  background: rgba(28, 18, 4, 0.72);
  border: 1px solid rgba(255, 214, 110, 0.6);
  box-shadow: 0 0 22px rgba(255, 190, 60, 0.35);
  animation: combo-in 0.3s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes combo-in {
  from { opacity: 0; transform: translateY(10px) scale(0.8); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.hint-chip {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 12px;
  color: rgba(242, 246, 255, 0.6);
  background: rgba(10, 16, 38, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ---------- 结算 ---------- */
.win-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 36px 52px;
  border-radius: 24px;
  background: rgba(8, 12, 30, 0.84);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55), 0 0 60px rgba(0, 229, 255, 0.18);
  animation: win-in 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes win-in {
  from { opacity: 0; transform: scale(0.7) rotateX(18deg); }
  to { opacity: 1; transform: scale(1) rotateX(0); }
}

.win-emblem {
  font-size: 64px;
  filter: drop-shadow(0 0 24px rgba(255, 214, 110, 0.8));
  animation: emblem-float 1.6s ease-in-out infinite;
}

@keyframes emblem-float {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-8px) rotate(4deg); }
}

.win-panel h2 {
  font-size: 34px;
  letter-spacing: 0.1em;
  background: linear-gradient(120deg, #fff7cf, var(--gold), #ff9d3d);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 2px 12px rgba(255, 180, 40, 0.4));
}

.win-meta {
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.win-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 漂浮文字 ---------- */
.toasts {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.toast {
  position: absolute;
  transform: translate(-50%, -50%);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.1em;
  white-space: nowrap;
  text-shadow: 0 0 18px currentColor, 0 2px 8px rgba(0, 0, 0, 0.7);
  animation: toast-pop 1.1s cubic-bezier(0.22, 1, 0.36, 1) both;
  z-index: 50;
}

.toast.small {
  font-size: 15px;
  font-weight: 700;
}

@keyframes toast-pop {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.4); }
  16% { opacity: 1; transform: translate(-50%, -56%) scale(1.18); }
  28% { transform: translate(-50%, -52%) scale(1); }
  70% { opacity: 1; transform: translate(-50%, -70%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -92%) scale(0.92); }
}

/* ---------- 联机口令 ---------- */
.code-input {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.code-input:focus {
  border-color: rgba(0, 229, 255, 0.7);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.25);
}

.code-input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.config-hint {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
}

.hint-label {
  align-self: flex-start;
  margin-top: 2px;
}

.online-status {
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: #8ff0ff;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  animation: config-in 0.3s ease both;
}

.online-status.err {
  color: #ff9c9c;
  background: rgba(255, 80, 80, 0.12);
  border-color: rgba(255, 110, 110, 0.4);
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .cover-buttons {
    flex-direction: column;
  }

  .big-btn {
    min-width: 260px;
  }

  .config-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .config-label {
    width: auto;
  }

  .win-panel {
    padding: 28px 26px;
  }

  .chip-btn {
    padding: 7px 10px;
    font-size: 12px;
  }

  .turn-chip {
    min-width: 108px;
    padding: 7px 12px;
    font-size: 12px;
  }

  .hint-chip {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .title,
  .title-kicker,
  .win-emblem,
  .turn-chip.thinking {
    animation: none;
  }
}