/* ============================================================
   弈道 · 五子棋 AI 训练
   设计语言：棋道 —— 漆色深夜 · 木纹棋枰 · 朱砂金印
   字体：ZCOOL XiaoWei (标题) + Noto Sans SC (正文)
   ============================================================ */

:root {
  --ink:        #16130f;   /* 漆色底 */
  --ink-2:      #1f1b16;
  --panel:      #241f19;
  --panel-2:    #2b2620;
  --line:       rgba(212, 169, 92, 0.14);
  --line-soft:  rgba(212, 169, 92, 0.08);
  --gold:       #d4a95c;   /* 金 */
  --gold-bright:#f0c47a;
  --vermilion:  #c8502e;   /* 朱砂 */
  --vermilion-bright:#e2683f;
  --paper:      #ede4d3;   /* 纸白 */
  --text:       #e8dfcd;
  --text-dim:   #9c8f7a;
  --text-faint: #6b6152;
  --board-wood: #d9a860;
  --board-line: #5a3c14;
  --shadow-deep: 0 20px 60px rgba(0,0,0,0.55);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--ink);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .seal, .result-stamp, .turn-vs {
  font-family: 'ZCOOL XiaoWei', 'Noto Sans SC', serif;
}

/* ============ 环境光层 ============ */
.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.ambient__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.5;
  animation: glowDrift 18s ease-in-out infinite alternate;
}
.ambient__glow--a {
  width: 640px; height: 640px;
  top: -200px; left: -160px;
  background: radial-gradient(circle, rgba(200, 80, 46, 0.16), transparent 70%);
}
.ambient__glow--b {
  width: 720px; height: 720px;
  bottom: -260px; right: -200px;
  background: radial-gradient(circle, rgba(212, 169, 92, 0.12), transparent 70%);
  animation-delay: -9s;
}
@keyframes glowDrift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, 40px) scale(1.15); }
}
/* 隐约棋枰格 */
.ambient__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 75%);
}

.app {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 24px 40px;
}

/* ============ 页头 ============ */
.site-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
  animation: fadeDown 0.7s var(--ease-out) both;
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.brand { display: flex; align-items: center; gap: 16px; }
.seal {
  width: 58px; height: 58px;
  display: grid; place-items: center;
  font-size: 32px;
  color: #fff;
  background: linear-gradient(145deg, var(--vermilion-bright), var(--vermilion) 60%, #9c3a20);
  border-radius: 10px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.25),
    0 6px 18px rgba(200, 80, 46, 0.35);
  transform: rotate(-3deg);
  transition: transform 0.35s var(--ease-spring);
  user-select: none;
}
.seal:hover { transform: rotate(0deg) scale(1.06); }
.seal--gold {
  width: 46px; height: 46px;
  font-size: 24px;
  background: linear-gradient(145deg, var(--gold-bright), var(--gold) 60%, #a97f3c);
  color: #2a1e08;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.4),
    0 6px 18px rgba(212, 169, 92, 0.3);
}
.brand__text h1 {
  font-size: 1.85rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--paper);
  line-height: 1.15;
}
.brand__dot { color: var(--vermilion-bright); margin: 0 2px; }
.brand__text p {
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.25em;
  margin-top: 4px;
}

/* 战绩 */
.stats { display: flex; gap: 10px; }
.stat {
  min-width: 66px;
  padding: 10px 14px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: transform 0.25s var(--ease-out), border-color 0.25s;
}
.stat:hover { transform: translateY(-3px); border-color: rgba(212,169,92,0.35); }
.stat__num {
  display: block;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--gold-bright);
  font-variant-numeric: tabular-nums;
  transition: transform 0.2s;
}
.stat__num.bump { animation: numBump 0.4s var(--ease-spring); }
@keyframes numBump {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.35); color: var(--vermilion-bright); }
  100% { transform: scale(1); }
}
.stat__label {
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.2em;
}

/* ============ 主体布局 ============ */
.main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 288px;
  gap: 26px;
  align-items: start;
}

/* ============ 回合指示 ============ */
.turn-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: center;
  margin-bottom: 18px;
  animation: fadeUp 0.7s 0.1s var(--ease-out) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.turn-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  opacity: 0.55;
  transition: opacity 0.4s, border-color 0.4s, box-shadow 0.4s, transform 0.3s var(--ease-out);
}
.turn-card.is-active {
  opacity: 1;
  border-color: rgba(212, 169, 92, 0.45);
  box-shadow: 0 0 0 1px rgba(212,169,92,0.15), 0 8px 24px rgba(0,0,0,0.35);
  transform: translateY(-2px);
}
.turn-card:last-of-type { flex-direction: row-reverse; text-align: right; }
.stone-dot {
  flex: 0 0 auto;
  width: 26px; height: 26px;
  border-radius: 50%;
}
.stone-dot--human.is-black, .stone-dot--ai.is-black { background: radial-gradient(circle at 35% 30%, #666, #111 70%); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.6), 0 2px 5px rgba(0,0,0,0.5); }
.stone-dot--human.is-white, .stone-dot--ai.is-white { background: radial-gradient(circle at 35% 30%, #fff, #c9c3b5 75%); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.15), 0 2px 5px rgba(0,0,0,0.5); }
.turn-card__name {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
}
.turn-card__side {
  display: block;
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-top: 1px;
}
.turn-card__pulse {
  position: absolute;
  top: 10px; right: 12px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0;
}
.turn-card:last-of-type .turn-card__pulse { right: auto; left: 12px; }
.turn-card.is-active .turn-card__pulse {
  opacity: 1;
  animation: pulseDot 1.4s ease-in-out infinite;
}
@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(212,169,92,0.55); }
  60%      { box-shadow: 0 0 0 7px rgba(212,169,92,0); }
}
.turn-vs {
  font-size: 1.1rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}
.turn-status {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.88rem;
  color: var(--gold);
  letter-spacing: 0.08em;
  min-height: 1.4em;
  transition: color 0.3s;
}
.turn-status.is-win { color: var(--vermilion-bright); font-weight: 700; font-size: 1rem; }

/* ============ 棋盘 ============ */
.board-frame {
  position: relative;
  animation: fadeUp 0.7s 0.18s var(--ease-out) both;
}
.board-frame__inner {
  padding: 14px;
  background:
    linear-gradient(160deg, rgba(240,196,122,0.10), transparent 40%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-deep);
  display: flex;
  justify-content: center;
}
#board {
  cursor: pointer;
  border-radius: 10px;
  display: block;
  max-width: 100%;
  touch-action: manipulation;
}

/* 胜负覆盖层 */
.result-overlay {
  position: absolute;
  inset: 14px;
  z-index: 5;
  display: grid;
  place-items: center;
  background: rgba(16, 13, 9, 0.72);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border-radius: 10px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s var(--ease-out), visibility 0.45s;
}
.result-overlay.is-visible { opacity: 1; visibility: visible; }
.result-card {
  text-align: center;
  padding: 36px 48px;
  transform: translateY(24px) scale(0.92);
  transition: transform 0.5s var(--ease-spring) 0.1s;
}
.result-overlay.is-visible .result-card { transform: translateY(0) scale(1); }
.result-stamp {
  width: 92px; height: 92px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
  font-size: 50px;
  color: #fff;
  background: linear-gradient(145deg, var(--vermilion-bright), var(--vermilion) 65%, #9c3a20);
  border-radius: 14px;
  transform: rotate(-6deg);
  box-shadow: 0 10px 32px rgba(200, 80, 46, 0.4), inset 0 1px 0 rgba(255,255,255,0.25);
}
.result-overlay.is-visible .result-stamp {
  animation: stampIn 0.55s var(--ease-spring) 0.25s both;
}
@keyframes stampIn {
  0%   { transform: rotate(-6deg) scale(2.4); opacity: 0; }
  70%  { transform: rotate(-6deg) scale(0.94); opacity: 1; }
  100% { transform: rotate(-6deg) scale(1); }
}
.result-stamp--gold {
  background: linear-gradient(145deg, var(--gold-bright), var(--gold) 65%, #a97f3c);
  color: #2a1e08;
  box-shadow: 0 10px 32px rgba(212, 169, 92, 0.4), inset 0 1px 0 rgba(255,255,255,0.4);
}
.result-card h2 {
  font-size: 1.7rem;
  font-weight: 400;
  color: var(--paper);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.result-card p {
  font-size: 0.82rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  margin-bottom: 24px;
}
.result-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ============ 按钮 ============ */
.btn {
  padding: 11px 22px;
  border: none;
  border-radius: 9px;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: transform 0.2s var(--ease-out), box-shadow 0.25s, background 0.25s, border-color 0.25s, color 0.25s;
}
.btn:active { transform: scale(0.96); }
.btn--primary {
  background: linear-gradient(145deg, var(--vermilion-bright), var(--vermilion));
  color: #fff;
  box-shadow: 0 6px 20px rgba(200, 80, 46, 0.35);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(200, 80, 46, 0.5);
}
.btn--ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--line);
}
.btn--ghost:hover {
  color: var(--gold-bright);
  border-color: rgba(212,169,92,0.4);
  transform: translateY(-2px);
}

/* 芯片选择器 */
.chip {
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.025);
  color: var(--text-dim);
  font-size: 0.83rem;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.25s var(--ease-out);
}
.chip:hover { color: var(--text); border-color: rgba(212,169,92,0.35); transform: translateY(-1px); }
.chip--active {
  background: linear-gradient(145deg, var(--gold-bright), var(--gold));
  color: #2a1e08;
  font-weight: 700;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(212, 169, 92, 0.3);
}
.chip--active:hover { color: #2a1e08; transform: translateY(-1px); }

/* 控制栏 */
.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
  padding: 14px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  animation: fadeUp 0.7s 0.26s var(--ease-out) both;
}
.control-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.control-group--end { margin-left: auto; }
.control-group__label {
  font-size: 0.75rem;
  color: var(--text-faint);
  letter-spacing: 0.15em;
  margin-right: 2px;
}

/* ============ 侧栏棋谱 ============ */
.side-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: fadeUp 0.7s 0.3s var(--ease-out) both;
  position: sticky;
  top: 24px;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}
.panel__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.panel__head h2 {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--paper);
  letter-spacing: 0.12em;
}
.panel__badge {
  font-size: 0.72rem;
  color: var(--gold);
  background: rgba(212,169,92,0.1);
  border: 1px solid rgba(212,169,92,0.25);
  padding: 3px 10px;
  border-radius: 999px;
  font-variant-numeric: tabular-nums;
}
.move-list {
  list-style: none;
  max-height: 420px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--panel-2) transparent;
}
.move-list::-webkit-scrollbar { width: 6px; }
.move-list::-webkit-scrollbar-thumb { background: var(--panel-2); border-radius: 3px; }
.move-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  font-size: 0.84rem;
  border-radius: 7px;
  font-variant-numeric: tabular-nums;
  animation: moveIn 0.3s var(--ease-out) both;
  transition: background 0.2s;
}
@keyframes moveIn {
  from { opacity: 0; transform: translateX(-8px); }
  to   { opacity: 1; transform: translateX(0); }
}
.move-list li:hover { background: rgba(212,169,92,0.07); }
.move-list li.is-latest { background: rgba(200,80,46,0.12); }
.move-list .mv-num { color: var(--text-faint); min-width: 24px; font-size: 0.75rem; }
.move-list .mv-stone { width: 14px; height: 14px; border-radius: 50%; flex: 0 0 auto; }
.mv-stone--b { background: radial-gradient(circle at 35% 30%, #666, #111 70%); }
.mv-stone--w { background: radial-gradient(circle at 35% 30%, #fff, #c9c3b5 75%); border: 1px solid #aaa; }
.move-list .mv-who { color: var(--text-dim); min-width: 26px; }
.move-list .mv-pos { color: var(--paper); font-weight: 500; letter-spacing: 0.05em; }
.move-list__empty {
  color: var(--text-faint) !important;
  font-size: 0.8rem !important;
  justify-content: center;
  padding: 26px 10px !important;
}

.panel--tip {
  border-left: 3px solid var(--gold);
}
.panel--tip h3 {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--gold-bright);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.panel--tip p {
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ============ 复盘区 ============ */
.review-zone {
  margin-top: 30px;
  background:
    linear-gradient(170deg, rgba(212,169,92,0.06), transparent 35%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 30px;
  box-shadow: var(--shadow-deep);
}
.review-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.review-head h2 {
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--paper);
  letter-spacing: 0.1em;
}
.review-head p {
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-top: 3px;
}
.review-content {
  font-size: 0.94rem;
  line-height: 1.95;
  color: var(--text);
  max-width: 860px;
}
.review-content h1, .review-content h2, .review-content h3 {
  color: var(--gold-bright);
  font-weight: 400;
  letter-spacing: 0.08em;
  margin: 20px 0 8px;
}
.review-content h2 { font-size: 1.2rem; }
.review-content h3 { font-size: 1.05rem; }
.review-content strong { color: var(--vermilion-bright); }
.review-content code {
  background: rgba(212,169,92,0.1);
  color: var(--gold-bright);
  padding: 2px 8px;
  border-radius: 5px;
  font-size: 0.85em;
}
.review-content li { margin-left: 22px; margin-bottom: 6px; }
.review-content li::marker { color: var(--gold); }
.review-content p { margin-bottom: 8px; }

.loading {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 34px 0;
  font-size: 0.95rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}
.loading::before {
  content: '';
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 3px solid var(--line);
  border-top-color: var(--gold);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ 页脚 ============ */
.site-foot {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-faint);
  letter-spacing: 0.25em;
}
.site-foot__sep { margin: 0 12px; color: var(--vermilion); }

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  .main { grid-template-columns: 1fr; }
  .side-panel { position: static; }
  .move-list { max-height: 240px; }
}
@media (max-width: 640px) {
  .app { padding: 18px 14px 32px; }
  .brand__text h1 { font-size: 1.4rem; }
  .seal { width: 48px; height: 48px; font-size: 26px; }
  .turn-bar { grid-template-columns: 1fr auto 1fr; gap: 8px; }
  .turn-card { padding: 10px 12px; gap: 8px; }
  .controls { justify-content: center; }
  .control-group--end { margin-left: 0; }
  .result-card { padding: 26px 20px; }
  .stat { min-width: 56px; padding: 8px 10px; }
}