/* 象棋残局 —— 红木棋桌对弈局视窗。沉浸暗色 + 茶室暖光 + 纸质记分簿 + 木浮雕控件。 */

:root {
  --table-deep: #170c06;
  --table-warm: #3a2013;
  --paper-hi: #efe2bd;
  --paper-lo: #ddc795;
  --ink: #3b2a18;
  --ink-soft: rgba(59, 42, 24, 0.72);
  --wood-hi: #b3854e;
  --wood-lo: #7c5227;
  --wood-text: #f7e9cd;
  --amber: #ffcf8a;
  --amber-soft: rgba(255, 207, 138, 0.55);
  --red-wax: #b8433a;
  --safe-bottom: max(68px, calc(16px + env(safe-area-inset-bottom)));
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(1200px 700px at 50% 30%, rgba(255, 176, 96, 0.14), rgba(0, 0, 0, 0) 62%),
    radial-gradient(900px 500px at 18% 85%, rgba(184, 67, 58, 0.08), rgba(0, 0, 0, 0) 55%),
    linear-gradient(180deg, #221109 0%, var(--table-deep) 70%);
  color: var(--paper-hi);
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
}

#game-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── 顶栏（茶室暖光横梁）────────────────────────────────────── */
#stage-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px clamp(12px, 3vw, 28px);
  background: linear-gradient(180deg, rgba(64, 36, 18, 0.92), rgba(38, 20, 10, 0.88));
  border-bottom: 1px solid rgba(255, 207, 138, 0.14);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.45);
}

#stage-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

#stage-title {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 26px);
  font-family: "STKaiti", "KaiTi", "SimSun", serif;
  letter-spacing: 6px;
  color: #f2dfae;
  text-shadow: 0 0 18px rgba(255, 191, 105, 0.35);
  white-space: nowrap;
}

#stage-subtitle {
  font-size: 12px;
  color: rgba(242, 223, 174, 0.55);
  letter-spacing: 2px;
  white-space: nowrap;
}

.stage-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

.bar-btn {
  min-width: 38px;
  height: 34px;
  padding: 0 12px;
  border: none;
  border-radius: 9px;
  background: linear-gradient(180deg, var(--wood-hi), var(--wood-lo));
  color: var(--wood-text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 232, 190, 0.35), 0 3px 8px rgba(0, 0, 0, 0.4);
  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.15s ease;
}

.bar-btn:hover { filter: brightness(1.08); }
.bar-btn:active { transform: translateY(2px); box-shadow: inset 0 1px 0 rgba(255, 232, 190, 0.2), 0 1px 3px rgba(0, 0, 0, 0.4); }

/* ─── 主舞台：三区棋桌 ───────────────────────────────────────── */
#stage-core {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(228px, 270px) minmax(0, 1fr) minmax(228px, 270px);
  gap: clamp(12px, 2vw, 26px);
  padding: clamp(12px, 2.4vw, 28px) clamp(12px, 3.5vw, 48px) clamp(20px, 3vw, 36px);
  align-items: start;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

/* 泛黄纸质卡（记分簿 / 棋谱卡 / 抽屉）*/
.paper-card {
  background:
    radial-gradient(140% 100% at 20% 0%, rgba(255, 250, 230, 0.5), rgba(0, 0, 0, 0) 55%),
    linear-gradient(165deg, var(--paper-hi), var(--paper-lo));
  color: var(--ink);
  border-radius: 14px;
  padding: 16px 16px 18px;
  box-shadow:
    inset 0 0 0 1px rgba(120, 84, 40, 0.25),
    inset 0 -14px 30px rgba(166, 124, 66, 0.18),
    0 10px 26px rgba(0, 0, 0, 0.45);
}

.paper-title {
  margin: 0 0 10px;
  font-family: "STKaiti", "KaiTi", "SimSun", serif;
  font-size: 17px;
  letter-spacing: 4px;
  color: #4a3010;
  border-bottom: 1px dashed rgba(90, 62, 26, 0.4);
  padding-bottom: 8px;
}

.ink-line {
  margin: 6px 0;
  font-size: 13.5px;
  color: var(--ink);
  line-height: 1.55;
}

/* 模式页签（手账标签）*/
#mode-tabs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 6px 0 12px;
}

.mode-tab {
  border: none;
  text-align: left;
  padding: 9px 12px;
  border-radius: 8px;
  background: rgba(124, 82, 39, 0.12);
  color: var(--ink);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(124, 82, 39, 0.28);
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.08s ease;
}

.mode-tab:hover { background: rgba(124, 82, 39, 0.2); }
.mode-tab:active { transform: translateY(1px); }
.mode-tab.active {
  background: linear-gradient(180deg, #b8874d, #96632f);
  color: var(--wood-text);
  box-shadow: inset 0 1px 0 rgba(255, 232, 190, 0.4), 0 3px 10px rgba(80, 44, 12, 0.4);
}

.badge-caption { margin-top: 12px; }

#badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.badge-chip {
  font-size: 12px;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(124, 82, 39, 0.14);
  color: var(--ink-soft);
  box-shadow: inset 0 0 0 1px rgba(124, 82, 39, 0.26);
}

.badge-chip.earned {
  background: linear-gradient(180deg, #e8b45a, #c98d2e);
  color: #3d2606;
  font-weight: 600;
  box-shadow: 0 0 12px rgba(232, 180, 90, 0.45);
}

/* ─── 棋桌中央 ───────────────────────────────────────────────── */
#table-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

#status-strip {
  width: 100%;
  max-width: 620px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 13.5px;
  color: rgba(242, 223, 174, 0.85);
  text-shadow: 0 0 10px rgba(255, 191, 105, 0.25);
  min-height: 20px;
}

#status-right { color: rgba(242, 223, 174, 0.6); }

#board {
  display: block;
  width: min(100%, 620px);
  aspect-ratio: 10 / 10.4;
  max-height: calc(100vh - 250px);
  border-radius: 12px;
  touch-action: none;
  cursor: pointer;
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.55), 0 0 60px rgba(255, 176, 96, 0.07);
}

/* 木制棋盒操作托盘 */
#action-tray {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.tray-btn {
  min-width: 86px;
  height: 40px;
  padding: 0 16px;
  border: none;
  border-radius: 11px;
  background: linear-gradient(180deg, var(--wood-hi), var(--wood-lo));
  color: var(--wood-text);
  font-size: 14.5px;
  font-family: inherit;
  letter-spacing: 2px;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 232, 190, 0.4), inset 0 -2px 0 rgba(60, 32, 8, 0.35), 0 4px 12px rgba(0, 0, 0, 0.42);
  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.15s ease, opacity 0.15s ease;
}

.tray-btn:hover { filter: brightness(1.1); }
.tray-btn:active { transform: translateY(2px); box-shadow: inset 0 1px 0 rgba(255, 232, 190, 0.25), 0 2px 5px rgba(0, 0, 0, 0.4); }
.tray-btn:disabled { opacity: 0.45; cursor: default; filter: none; transform: none; }
.tray-btn.primary {
  background: linear-gradient(180deg, #d0654f, #9c3c2c);
  box-shadow: inset 0 1px 0 rgba(255, 224, 200, 0.45), 0 4px 14px rgba(184, 67, 58, 0.4);
}

/* 右翼：棋谱卡 + AI 档位 */
#chessbox {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.level-name {
  font-family: "STKaiti", "KaiTi", "SimSun", serif;
  font-size: 16px;
  color: #5a3410;
  letter-spacing: 1px;
}

#tier-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tier-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  border: none;
  padding: 9px 12px;
  border-radius: 8px;
  background: rgba(124, 82, 39, 0.12);
  color: var(--ink);
  font-size: 13.5px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(124, 82, 39, 0.28);
  transition: background 0.15s ease, transform 0.08s ease;
}

.tier-btn:hover { background: rgba(124, 82, 39, 0.2); }
.tier-btn:active { transform: translateY(1px); }
.tier-btn.active {
  background: linear-gradient(180deg, #b8874d, #96632f);
  color: var(--wood-text);
  box-shadow: inset 0 1px 0 rgba(255, 232, 190, 0.4), 0 0 14px rgba(232, 180, 90, 0.35);
}

.tier-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(60, 36, 10, 0.18);
  color: var(--ink-soft);
}

.tier-badge.earned { background: linear-gradient(180deg, #e8b45a, #c98d2e); color: #3d2606; font-weight: 600; }

/* ─── 抽屉与弹层 ─────────────────────────────────────────────── */
#level-drawer, #result-modal, #help-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

/* display:flex 会覆盖 hidden 属性的 UA 样式，必须显式夺回，否则弹层常显且关不掉 */
#level-drawer[hidden], #result-modal[hidden], #help-modal[hidden] {
  display: none;
}

.drawer-mask {
  position: absolute;
  inset: 0;
  background: rgba(12, 5, 2, 0.62);
  backdrop-filter: blur(3px);
}

.drawer-body {
  position: relative;
  width: min(560px, 94vw);
  max-height: min(78vh, 720px);
  overflow: auto;
  animation: drawer-in 0.18s ease;
}

@keyframes drawer-in {
  from { transform: translateY(14px) scale(0.985); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.drawer-head .paper-title { margin: 0; border: none; padding: 0; }

#help-body {
  margin: 0;
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--ink);
  white-space: pre-wrap;
}

.chapter-block { margin-bottom: 14px; }

.chapter-name {
  font-family: "STKaiti", "KaiTi", "SimSun", serif;
  font-size: 15px;
  letter-spacing: 2px;
  color: #5a3410;
  margin: 4px 0 8px;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

.level-chip {
  border: none;
  border-radius: 10px;
  padding: 8px 2px 7px;
  background: rgba(124, 82, 39, 0.12);
  color: var(--ink);
  font-family: inherit;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(124, 82, 39, 0.28);
  transition: background 0.15s ease, transform 0.08s ease;
}

.level-chip:hover:not(:disabled) { background: rgba(124, 82, 39, 0.22); }
.level-chip:active:not(:disabled) { transform: translateY(1px); }
.level-chip:disabled { opacity: 0.4; cursor: default; }

.level-chip .no { display: block; font-size: 14px; font-weight: 600; }
.level-chip .stars { display: block; font-size: 11px; margin-top: 2px; color: #a8741e; }
.level-chip.current { background: linear-gradient(180deg, #b8874d, #96632f); color: var(--wood-text); box-shadow: 0 0 12px rgba(232, 180, 90, 0.4); }
.level-chip.current .stars { color: rgba(247, 233, 205, 0.85); }

.result-card { text-align: center; padding-bottom: 22px; }
#result-title { font-family: "STKaiti", "KaiTi", "SimSun", serif; letter-spacing: 4px; font-size: 22px; color: #5a3410; margin: 6px 0 4px; }
.result-actions { display: flex; justify-content: center; gap: 12px; margin-top: 14px; }

.noscript-tip {
  position: fixed;
  inset: auto 0 0;
  text-align: center;
  padding: 12px;
  background: #7e241d;
  color: #ffe9d8;
}

/* ─── 移动端 ─────────────────────────────────────────────────── */
@media (max-width: 899px) {
  #stage-core {
    grid-template-columns: 1fr;
    padding-bottom: var(--safe-bottom);
  }

  #scorebook { order: 2; }
  #table-zone { order: 1; }
  #chessbox { order: 3; }

  #mode-tabs { flex-direction: row; flex-wrap: wrap; }
  .mode-tab { flex: 1 1 auto; text-align: center; }

  #board { max-height: 62vh; }
  #action-tray { padding-bottom: 6px; }

  .level-grid { grid-template-columns: repeat(4, 1fr); }

  #stage-subtitle { display: none; }
}

/* ─── 动效降级 ───────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}