/* ============================================================
   PHY-MATCH // 棋盘与游戏 UI 布局
   ============================================================ */

/* ── 游戏主容器 ── */
#game-container {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 16px 16px 80px;
}

/* ── 顶部 HUD ── */
#top-hud {
  width: 100%;
  max-width: 600px;
  display: grid;
  grid-template-columns: 1fr 1.6fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.hud-left, .hud-right {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hud-right { align-items: flex-end; }

.hud-center {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hud-label {
  font-size: 8px;
  letter-spacing: 0.25em;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.hud-value {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.1em;
  text-shadow: 0 0 8px rgba(255,255,255,0.3);
}
.hud-value.large {
  font-size: 28px;
}

.progress-track {
  width: 100%;
  max-width: 160px;
  height: 2px;
  background: rgba(255,255,255,0.08);
  margin-top: 6px;
  position: relative;
}
.progress-fill {
  height: 100%;
  background: #fff;
  width: 0%;
  transition: width 0.5s ease;
  position: relative;
}
.progress-tip {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  background: #fff;
  box-shadow: 0 0 4px #fff;
}
.target-text {
  font-size: 8px;
  color: var(--ink-faint);
  letter-spacing: 0.15em;
  margin-top: 4px;
}

.hud-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.15em;
  padding: 4px 8px;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 6px;
}
.hud-btn:hover {
  border-color: rgba(255,255,255,0.4);
  color: #fff;
  background: rgba(255,255,255,0.05);
}

/* ── 棋盘容器 ── */
#board-wrap {
  position: relative;
  padding: 8px;
  margin-bottom: 16px;
}

#game-canvas {
  display: block;
  border-radius: 2px;
}

/* ── 覆盖层（关卡选择 / 过关 / 失败） ── */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(5,5,5,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.overlay.hidden { display: none; }

.overlay-panel {
  padding: 36px 40px;
  min-width: 320px;
  max-width: 90vw;
  text-align: center;
  animation: fadeInUp 0.5s ease;
}

.panel-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 0 15px rgba(255,255,255,0.3);
}
.panel-title.victory { color: var(--accent-emerald); text-shadow: 0 0 15px rgba(52,211,153,0.4); }
.panel-title.defeat { color: var(--accent-red); text-shadow: 0 0 15px rgba(239,68,68,0.4); }

.stats-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
  text-align: left;
  padding: 0 12px;
}
.stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--ink-dim);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  padding-bottom: 4px;
}
.stat-row span:last-child {
  color: #fff;
  font-weight: 700;
}

.star-row {
  font-size: 28px;
  color: var(--accent-yellow);
  letter-spacing: 8px;
  margin-bottom: 20px;
  text-shadow: 0 0 10px rgba(244,208,63,0.4);
}
.star-row .star { opacity: 0.3; }
.star-row .star.lit { opacity: 1; }

.btn-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-row .hud-btn {
  font-size: 10px;
  padding: 8px 14px;
  border-color: rgba(255,255,255,0.2);
}

/* ── 关卡选择 ── */
.level-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}
.level-card {
  padding: 16px 12px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.4);
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
}
.level-card:hover {
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.04);
}
.level-card.locked {
  opacity: 0.4;
  cursor: not-allowed;
  border-color: rgba(255,255,255,0.05);
}
.level-card .lv-num {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.level-card .lv-name {
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--ink-dim);
  margin-bottom: 6px;
}
.level-card .lv-score {
  font-size: 8px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}
.level-card .lv-stars {
  font-size: 14px;
  color: var(--accent-yellow);
  margin-top: 4px;
}

/* ── 答题面板 ── */
.quiz-panel { max-width: 500px; }

.quiz-domain-tag {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 3px 10px;
  border: 1px solid;
  margin-bottom: 12px;
  display: inline-block;
}
.quiz-domain-tag[data-domain="mechanics"] { color: #F4D03F; border-color: #F4D03F; }
.quiz-domain-tag[data-domain="electromagnetism"] { color: #3498DB; border-color: #3498DB; }
.quiz-domain-tag[data-domain="thermodynamics"] { color: #E74C3C; border-color: #E74C3C; }
.quiz-domain-tag[data-domain="modern"] { color: #9B59B6; border-color: #9B59B6; }

.quiz-question {
  font-size: 13px;
  color: #fff;
  letter-spacing: 0.08em;
  line-height: 1.8;
  margin-bottom: 16px;
  text-align: left;
  padding: 0 8px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.quiz-option-btn {
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 10px 16px;
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
  line-height: 1.6;
}
.quiz-option-btn:hover {
  border-color: rgba(255,255,255,0.3);
  color: #fff;
  background: rgba(255,255,255,0.04);
}
.quiz-option-btn.selected {
  border-color: rgba(255,255,255,0.5);
  color: #fff;
  background: rgba(255,255,255,0.08);
  text-shadow: 0 0 6px rgba(255,255,255,0.3);
}
.quiz-option-btn.correct {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
  background: rgba(52,211,153,0.1);
  text-shadow: 0 0 6px rgba(52,211,153,0.4);
}
.quiz-option-btn.wrong {
  border-color: var(--accent-red);
  color: var(--accent-red);
  background: rgba(239,68,68,0.1);
}

.quiz-result {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  margin-bottom: 8px;
}
.quiz-result.correct-result { color: var(--accent-emerald); text-shadow: 0 0 10px rgba(52,211,153,0.4); }
.quiz-result.wrong-result { color: var(--accent-red); text-shadow: 0 0 10px rgba(239,68,68,0.4); }

.quiz-explanation {
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
  line-height: 1.8;
  margin-bottom: 12px;
  text-align: left;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.3);
}

.quiz-btn { margin-top: 8px; font-size: 10px; padding: 8px 16px; }

.quiz-skip-btn {
  font-size: 8px;
  color: var(--ink-faint);
  border: 1px solid rgba(255,255,255,0.06);
  margin-top: 4px;
  padding: 4px 10px;
}
.quiz-skip-btn:hover {
  color: var(--ink-dim);
  border-color: rgba(255,255,255,0.15);
}

/* ── 升级选择面板 ── */
.upgrade-panel { max-width: 500px; }

.upgrade-choices {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.upgrade-card {
  flex: 1;
  padding: 16px 14px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.4);
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
}
.upgrade-card:hover {
  border-color: rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.06);
}
.upgrade-card[data-domain="mechanics"]:hover { border-color: #F4D03F; }
.upgrade-card[data-domain="electromagnetism"]:hover { border-color: #3498DB; }
.upgrade-card[data-domain="thermodynamics"]:hover { border-color: #E74C3C; }
.upgrade-card[data-domain="modern"]:hover { border-color: #9B59B6; }

.upgrade-card .ug-name {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.12em;
  margin-bottom: 4px;
}
.upgrade-card .ug-formula {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.upgrade-card[data-domain="mechanics"] .ug-formula { color: #F4D03F; text-shadow: 0 0 8px rgba(244,208,63,0.4); }
.upgrade-card[data-domain="electromagnetism"] .ug-formula { color: #3498DB; text-shadow: 0 0 8px rgba(52,155,219,0.4); }
.upgrade-card[data-domain="thermodynamics"] .ug-formula { color: #E74C3C; text-shadow: 0 0 8px rgba(231,76,60,0.4); }
.upgrade-card[data-domain="modern"] .ug-formula { color: #9B59B6; text-shadow: 0 0 8px rgba(155,89,182,0.4); }

.upgrade-card .ug-desc {
  font-size: 9px;
  color: var(--ink-dim);
  letter-spacing: 0.12em;
  line-height: 1.6;
}

.upgrade-card.selected {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
}
.upgrade-card.selected .ug-name {
  text-shadow: 0 0 8px rgba(255,255,255,0.5);
}

/* ── 分数考察面板 ── */
.inspect-panel { max-width: 400px; text-align: center; }

.inspect-round {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.3em;
  text-shadow: 0 0 10px rgba(255,255,255,0.3);
  margin-bottom: 16px;
}

.inspect-stats {
  margin-bottom: 16px;
}

.inspect-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.3);
  margin-bottom: 4px;
}

.inspect-stat-label {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--ink-dim);
}

.inspect-stat-value {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.15em;
}
.inspect-stat-value.target {
  color: var(--accent-yellow);
  text-shadow: 0 0 8px rgba(244,208,63,0.4);
}

.inspect-result {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.3em;
  margin-bottom: 16px;
  padding: 12px;
}
.inspect-result.inspect-pass {
  color: var(--accent-emerald);
  text-shadow: 0 0 12px rgba(52,211,153,0.5);
  animation: pulse-glow 1s ease-in-out infinite alternate;
}
.inspect-result.inspect-fail {
  color: var(--accent-red);
  text-shadow: 0 0 12px rgba(239,68,68,0.5);
  animation: pulse-glow 1s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
  from { opacity: 0.7; }
  to { opacity: 1; }
}

/* ── 响应式 ── */
@media (max-width: 640px) {
  #top-hud {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 8px;
  }
  .hud-center { grid-column: 1 / -1; order: -1; }
  .hud-value.large { font-size: 22px; }
  #board-wrap { padding: 4px; }
  .overlay-panel { padding: 24px 20px; min-width: 280px; }
  .level-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 400px) {
  .hud-value { font-size: 14px; }
  .hud-value.large { font-size: 18px; }
  .level-grid { grid-template-columns: 1fr; }
}