/* codex: 2026-09-14 完善配色：深漆木盘+琥珀点缀+蓝红双方案色，棋盘尺寸改为CSS变量驱动以支持手动调节 */
:root {
    /* 环境底色：深漆胡桃木夜色 */
    --bg-deep: #16100b;
    --bg-mid: #332014;
    --bg-glow: #5c3a20;

    /* 木质棋盘 */
    --board-wood-hi: #9d6a36;
    --board-wood-lo: #5e3a1c;
    --board-frame: #3a2210;
    --board-inner: #291809;
    --board-rim: #6b4526;

    /* 棋子积木：空白为桦木原色，○蓝方 / ×红方 */
    --cube-blank-hi: #f5e6c8;
    --cube-blank-lo: #cbaa78;
    --cube-blank-edge: #a98a5c;
    --cube-circle-hi: #e8f3ff;
    --cube-circle-lo: #b9d8f7;
    --cube-circle: #1f7ae0;
    --cube-circle-deep: #0f4f9e;
    --cube-circle-glow: rgba(56, 152, 255, 0.5);
    --cube-cross-hi: #ffe9e6;
    --cube-cross-lo: #f7bfb8;
    --cube-cross: #e03434;
    --cube-cross-deep: #a1162a;
    --cube-cross-glow: rgba(255, 92, 82, 0.5);

    /* 点缀与文字 */
    --amber: #ffb648;
    --amber-deep: #e0891a;
    --gold: #e8c168;
    --gold-dim: rgba(232, 193, 104, 0.35);
    --text-light: #f8f0de;
    --text-muted: #c2ad92;

    /* 面板 */
    --card-bg: rgba(31, 19, 12, 0.88);
    --card-border: var(--gold-dim);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.55);

    /* 流式棋盘尺寸：随视口自适应（vh 分量按实测固定UI高度~420px预留，尽量减少滚动）；
       JS 可用内联样式覆盖 --cell-size 实现手动调节 */
    --cell-size: clamp(40px, min(calc((100vw - 132px) / 5), calc((100vh - 420px) / 5)), 88px);
    --cell-gap: clamp(4px, 0.9vw, 10px);
    --board-pad: clamp(6px, 1.4vw, 12px);
    --push-btn-size: clamp(34px, calc(var(--cell-size) * 0.58), 46px);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background:
        radial-gradient(ellipse at 50% -10%, var(--bg-glow) 0%, transparent 55%),
        radial-gradient(ellipse at 50% 115%, #241509 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-mid) 0%, var(--bg-deep) 100%);
    background-attachment: fixed;
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    overflow-x: hidden;
    touch-action: manipulation;
}

.game-container {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

/* ==================== 顶部标题栏 ==================== */
header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
}

.title-group h1 {
    font-size: 26px;
    letter-spacing: 2px;
    background: linear-gradient(180deg, #fbe7b5 0%, var(--gold) 55%, #b98a2e 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
    filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.7));
}

.title-group .subtitle {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: normal;
}

.header-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* ==================== 通用按钮 ==================== */
.btn {
    background: linear-gradient(180deg, #96602f 0%, #5f3819 100%);
    color: var(--text-light);
    border: 1px solid var(--gold-dim);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.4);
    min-height: 36px;
}

.btn:hover:not(:disabled) {
    background: linear-gradient(180deg, #b07038 0%, #75431f 100%);
    border-color: var(--gold);
    transform: translateY(-1px);
    box-shadow: 0 5px 14px rgba(232, 193, 104, 0.28);
}

.btn:active:not(:disabled) {
    transform: translateY(1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(0.6);
}

.btn-ghost {
    background: transparent;
    box-shadow: none;
    border: 1px solid var(--gold-dim);
    padding: 6px 10px;
    font-size: 12px;
    min-height: 30px;
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(232, 193, 104, 0.12);
    box-shadow: none;
}

/* ==================== 玩家状态栏 ==================== */
.status-bar {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
}

.player-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 14px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.28);
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.player-card.active {
    border-color: var(--gold);
    background: rgba(232, 193, 104, 0.14);
    box-shadow: 0 0 16px rgba(232, 193, 104, 0.28);
}

.player-card.p1 .badge {
    color: var(--cube-circle);
    text-shadow: 0 0 12px var(--cube-circle-glow);
}

.player-card.p2 .badge {
    color: var(--cube-cross);
    text-shadow: 0 0 12px var(--cube-cross-glow);
}

.player-card .badge {
    font-size: 28px;
    font-weight: 900;
    line-height: 1;
}

.player-info {
    display: flex;
    flex-direction: column;
}

.player-name {
    font-weight: bold;
    font-size: 15px;
}

.player-role {
    font-size: 12px;
    color: var(--text-muted);
}

.round-info {
    text-align: center;
}

.instruction-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--gold);
    min-height: 24px;
}

.step-indicator {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ==================== 棋盘 ==================== */
.board-wrapper {
    position: relative;
    padding: clamp(14px, 2.6vw, 30px);
    background:
        radial-gradient(circle at 50% 22%, rgba(255, 182, 72, 0.08) 0%, transparent 60%),
        linear-gradient(160deg, #241408 0%, #150b05 100%);
    border-radius: 20px;
    border: 1px solid rgba(232, 193, 104, 0.16);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.75), inset 0 2px 10px rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: center;
    align-items: center;
}

.board-outer {
    position: relative;
    background: linear-gradient(145deg, var(--board-wood-hi) 0%, var(--board-wood-lo) 100%);
    padding: clamp(10px, 2.2vw, 18px);
    border-radius: 16px;
    border: 4px solid var(--board-frame);
    box-shadow:
        inset 0 3px 6px rgba(255, 226, 178, 0.22),
        inset 0 -3px 8px rgba(0, 0, 0, 0.45),
        0 15px 30px rgba(0, 0, 0, 0.7);
}

.board-grid {
    display: grid;
    grid-template-columns: repeat(5, var(--cell-size));
    grid-template-rows: repeat(5, var(--cell-size));
    gap: var(--cell-gap);
    background: var(--board-inner);
    padding: var(--board-pad);
    border-radius: 10px;
    box-shadow: inset 0 4px 14px rgba(0, 0, 0, 0.9);
}

/* ==================== 棋子积木 ==================== */
.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    position: relative;
    background: linear-gradient(150deg, var(--cube-blank-hi) 0%, var(--cube-blank-lo) 100%);
    border-radius: calc(var(--cell-size) * 0.13);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: calc(var(--cell-size) * 0.56);
    font-weight: 900;
    cursor: pointer;
    box-shadow:
        0 4px 8px rgba(0, 0, 0, 0.45),
        inset 0 2px 3px rgba(255, 255, 255, 0.5),
        inset 0 -3px 5px rgba(120, 84, 40, 0.35);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease, background 0.3s ease;
    border: 1px solid var(--cube-blank-edge);
    line-height: 1;
}

.cell:hover:not(.disabled) {
    transform: translateY(-2px);
    box-shadow: 0 7px 14px rgba(0, 0, 0, 0.5);
}

.cell.inner {
    opacity: 0.92;
}

.cell.pickable {
    cursor: pointer;
    box-shadow:
        0 0 14px rgba(255, 182, 72, 0.55),
        inset 0 0 6px rgba(255, 182, 72, 0.75),
        0 4px 8px rgba(0, 0, 0, 0.4);
    border: 2px solid var(--amber);
    animation: pulse-border 1.8s infinite;
}

@keyframes pulse-border {
    0%, 100% { transform: scale(1); box-shadow: 0 0 8px rgba(255, 182, 72, 0.4); }
    50% { transform: scale(1.03); box-shadow: 0 0 18px rgba(255, 182, 72, 0.9); }
}

.cell.selected {
    transform: translateY(-8px) scale(1.08);
    box-shadow: 0 14px 25px rgba(0, 0, 0, 0.6), 0 0 22px var(--amber);
    border: 2px solid #fff;
    z-index: 10;
}

/* 蓝方（○）棋子顶面 */
.cell.circle {
    background: linear-gradient(150deg, var(--cube-circle-hi) 0%, var(--cube-circle-lo) 100%);
    border-color: #8fb4d9;
    color: var(--cube-circle-deep);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.6), 0 0 12px var(--cube-circle-glow);
}

/* 红方（×）棋子顶面 */
.cell.cross {
    background: linear-gradient(150deg, var(--cube-cross-hi) 0%, var(--cube-cross-lo) 100%);
    border-color: #d9a09a;
    color: var(--cube-cross-deep);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.6), 0 0 12px var(--cube-cross-glow);
}

.cell.win-cell {
    background: linear-gradient(150deg, #ffe9a8 0%, #f2b53c 100%) !important;
    animation: win-glow 1.2s infinite alternate;
    z-index: 5;
}

@keyframes win-glow {
    from { box-shadow: 0 0 10px #ffd700; transform: scale(1.02); }
    to { box-shadow: 0 0 26px #ffaa00; transform: scale(1.06); }
}

/* ==================== 推入滑动动画（玩家/电脑推子可视化） ==================== */
/* 第一步：无过渡地摆到滑动起点（该格内容来自相邻格） */
.cell.slide-init {
    transition: none !important;
}

/* 第二步：以平滑过渡滑入最终位置 */
.cell.slide-shift {
    transition: transform 0.45s cubic-bezier(0.22, 0.9, 0.35, 1) !important;
}

/* 新推入的棋子：翻面入场，模拟把积木翻转为己方面孔 */
.cell.cube-insert {
    animation: cube-flip-in 0.5s cubic-bezier(0.34, 1.3, 0.64, 1);
}

@keyframes cube-flip-in {
    0%   { transform: perspective(320px) rotateY(88deg) scale(0.72); opacity: 0.15; }
    55%  { opacity: 1; }
    100% { transform: perspective(320px) rotateY(0deg) scale(1); opacity: 1; }
}

/* ==================== 推入方向箭头 ==================== */
.push-arrow-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.push-btn {
    position: absolute;
    pointer-events: auto;
    width: var(--push-btn-size);
    height: var(--push-btn-size);
    background: radial-gradient(circle at 32% 28%, #ffc95e 0%, #f39c12 45%, #cf5b12 100%);
    border: 2px solid #fff;
    border-radius: 50%;
    color: #fff;
    font-size: calc(var(--push-btn-size) * 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.2s ease;
    animation: bounce 1.2s infinite;
    z-index: 20;
    line-height: 1;
}

.push-btn:hover {
    transform: scale(1.22);
    background: radial-gradient(circle at 32% 28%, #ffe08a 0%, #ffc107 45%, #ff5722 100%);
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.9);
}

@keyframes bounce {
    0%, 100% { translate: 0 0; }
    50% { translate: 0 -4px; }
}

/* ==================== 底部控制面板 ==================== */
.bottom-panel {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
}

.mode-select-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

select {
    background: #4a2d1a;
    color: var(--text-light);
    border: 1px solid var(--gold-dim);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    cursor: pointer;
    min-height: 34px;
}

select:focus {
    border-color: var(--gold);
}

.actions-group {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

/* 棋盘大小调节器 */
.size-control {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
}

.size-control input[type="range"] {
    width: clamp(90px, 16vw, 150px);
    accent-color: var(--amber);
    cursor: pointer;
}