/* ─── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #2a1008;
    --surface: rgba(35,18,10,0.88);
    --surface2: rgba(80,40,20,0.5);
    --border: rgba(200,130,60,0.35);
    --primary: #c07030;
    --primary-hover: #d88840;
    --text: #f0e0d0;
    --text-dim: #c0a080;
    --success: #5ccc50;
    --error: #e04040;
    --r: 3px;
    --card-w: 72px;
    --card-h: 100px;
    --page-center-width: clamp(560px, 60vw, 1240px);
}

body {
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    color: var(--text);
    min-height: 100vh;
    --bg-color: #2a1008;
    --bg-image: url("/static/bg-redpink.svg");
    --bg-layer-size: 180vmax;
    --bg-layer-scale: 1.02;
    --bg-rotation: none;
    background-color: var(--bg-color);
    position: relative;
    overflow-x: hidden;
    transition: background-color 0.5s ease-out;
}

/* Reusable background renderer (decoupled from page logic). */
body::before {
    content: "";
    position: fixed;
    left: 50%;
    top: 50%;
    width: var(--bg-layer-size);
    height: var(--bg-layer-size);
    background-image: var(--bg-image);
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    transform-origin: center center;
    transform: translate(-50%, -50%) scale(var(--bg-layer-scale));
    animation: var(--bg-rotation);
    will-change: transform;
    backface-visibility: hidden;
    z-index: -1;
    pointer-events: none;
    transition: filter 0.5s ease-out;
}

@keyframes bgSpinSmoothReverse {
    from { transform: translate(-50%, -50%) rotate(0deg) scale(1.02); }
    to { transform: translate(-50%, -50%) rotate(-360deg) scale(1.02); }
}

/* Background profiles (image + motion presets). */
body.bg-profile-redpink {
    --bg-color: #2a1008;
    --bg-image: url("/static/bg-redpink.svg");
    --bg-layer-size: 180vmax;
    --bg-layer-scale: 1.02;
    --bg-rotation: none;
    --panel-bg: linear-gradient(180deg,
        rgba(38, 10, 16, 0.74) 0%,
        rgba(26, 8, 12, 0.58) 28%,
        rgba(26, 8, 12, 0.58) 72%,
        rgba(38, 10, 16, 0.74) 100%);
}

body.bg-profile-redpink-spin {
    --bg-color: #2a1008;
    --bg-image: url("/static/bg-redpink.svg");
    --bg-layer-size: 180vmax;
    --bg-layer-scale: 1.02;
    --bg-rotation: bgSpinSmoothReverse 360s linear infinite;
    --panel-bg: linear-gradient(180deg,
        rgba(38, 10, 16, 0.74) 0%,
        rgba(26, 8, 12, 0.58) 28%,
        rgba(26, 8, 12, 0.58) 72%,
        rgba(38, 10, 16, 0.74) 100%);
}

body.bg-profile-bluecyan {
    --bg-color: #081a1a;
    --bg-image: url("/static/bg-bluecyan.svg");
    --bg-layer-size: 180vmax;
    --bg-layer-scale: 1.02;
    --bg-rotation: bgSpinSmoothReverse 360s linear infinite;
    --panel-bg: linear-gradient(180deg,
        rgba(8, 26, 30, 0.74) 0%,
        rgba(6, 18, 22, 0.58) 28%,
        rgba(6, 18, 22, 0.58) 72%,
        rgba(8, 26, 30, 0.74) 100%);
}

body.bg-profile-bluepurple {
    --bg-color: #160d2d;
    --bg-image: url("/static/bg-bluepurple.svg");
    --bg-layer-size: 180vmax;
    --bg-layer-scale: 1.02;
    --bg-rotation: bgSpinSmoothReverse 360s linear infinite;
    --panel-bg: linear-gradient(180deg,
        rgba(18, 8, 34, 0.72) 0%,
        rgba(14, 6, 28, 0.58) 30%,
        rgba(14, 6, 28, 0.58) 70%,
        rgba(18, 8, 34, 0.72) 100%);
}

/* Unified semi-transparent center strip for all pages. */
body::after {
    content: "";
    position: fixed;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: var(--page-center-width);
    background: var(--panel-bg);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 24px rgba(0, 0, 0, 0.24);
    z-index: -1;
    pointer-events: none;
    transition: filter 0.5s ease-out;
}

/* ── Game result FX layers (pre-rendered, GPU composited) ─ */

.bg-fx-flash-overlay {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0;
    background: linear-gradient(90deg,
        rgba(255,255,255,0.95) 0%,
        rgba(255,255,255,0.35) 35%,
        rgba(255,255,255,0.35) 65%,
        rgba(255,255,255,0.95) 100%);
    will-change: opacity;
    transform: translateZ(0);
}

/* ── Slave-kills-Emperor: twin crimson flash ──────────── */
.bg-fx-crimson-overlay {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0;
    background: radial-gradient(ellipse at center,
        rgba(200,  0,  0, 0.92) 0%,
        rgba(140,  0,  0, 0.85) 28%,
        rgba( 80,  0,  0, 0.70) 58%,
        rgba( 20,  0,  0, 0.30) 100%);
    will-change: opacity;
    transform: translateZ(0);
}
@keyframes skCrimsonKill {
    /*  第一峰：预警 75%  */
    0%    { opacity: 0;    }
    6%    { opacity: 0.75; }   /* 峰 1 预警 ≈ 0.12s */
    16.5% { opacity: 0.03; }   /* 谷       ≈ 0.33s */
    /*  第二峰：主爆 95%，持续 0.6s  */
    30%   { opacity: 0.95; }   /* 峰 2 爆亮 ≈ 0.60s */
    51%   { opacity: 0.95; }   /* 峰 2 维持 ≈ 1.02s（-30%：0.6s→0.42s）*/
    80%   { opacity: 0;    }   /* 消散     ≈ 1.60s */
    100%  { opacity: 0;    }
}
.bg-fx-crimson-overlay.active {
    animation: skCrimsonKill 2.0s cubic-bezier(0.25, 0, 0.5, 1) forwards;
}

.bg-fx-layer {
    position: fixed;
    left: 50%;
    top: 50%;
    width: 180vmax;
    height: 180vmax;
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    transform-origin: center center;
    transform: translate(-50%, -50%) scale(1.02) translateZ(0);
    animation: var(--bg-rotation);
    z-index: -1;
    pointer-events: none;
    opacity: 0.01;
    will-change: opacity;
}

@media (prefers-reduced-motion: reduce) {
    body::before {
        animation: none;
    }
}

/* ─── Navbar ──────────────────────────────────────────────── */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 20px;
    background: rgba(30,14,6,0.85);
    border-bottom: 1px solid rgba(200,130,60,0.25);
    backdrop-filter: blur(10px);
}
.brand {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}
.nav-links { display: flex; gap: 6px; }
.nav-link {
    font-size: 0.85rem;
    padding: 4px 12px;
    color: var(--text-dim);
    text-decoration: none;
    border-radius: var(--r);
    transition: background 0.15s;
}
.nav-link:hover { background: rgba(200,130,60,0.15); color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-user { color: var(--text-dim); font-size: 0.9rem; }

.lang-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    padding: 2px 8px;
    border-radius: var(--r);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    line-height: 1.6;
}
.lang-toggle:hover {
    background: rgba(200, 130, 60, 0.15);
    border-color: var(--primary);
    color: var(--text);
}

/* ─── Buttons ─────────────────────────────────────────────── */
.btn {
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: var(--r);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    color: var(--text);
    background: rgba(50,25,12,0.7);
    transition: background 0.15s;
}
.btn:hover { background: rgba(70,35,18,0.8); }
.btn:active { background: rgba(90,45,22,0.8); }
.btn-primary { background: var(--primary); color: #fff; border-color: rgba(200,130,60,0.4); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-primary:active { background: #a06028; }
.btn-sm { padding: 3px 10px; font-size: 0.8rem; }
.btn-block { width: 100%; text-align: center; }

/* ─── Container ───────────────────────────────────────────── */
.container {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px 16px;
}

/* ─── Alerts ──────────────────────────────────────────────── */
.alert {
    padding: 8px 14px;
    border-radius: var(--r);
    margin-bottom: 14px;
    font-size: 0.85rem;
    border: 1px solid;
}
.alert-error { background: rgba(224,64,64,0.15); border-color: var(--error); color: #ff9090; }
.alert-success { background: rgba(92,204,80,0.15); border-color: var(--success); color: #80e080; }

/* ─── Auth Card ───────────────────────────────────────────── */
.auth-card {
    max-width: 360px;
    margin: 50px auto;
    background: rgba(30,15,8,0.75);
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(8px);
}
.auth-card h2 {
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
}
.form-group { margin-bottom: 14px; }
.form-group label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.85rem;
    color: var(--text-dim);
}
.form-group input {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: var(--r);
    background: rgba(30,14,6,0.6);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
}
.form-group input:focus { border-color: var(--primary); outline: 1px solid var(--primary); }
.auth-card .btn { margin-top: 8px; }
.auth-link {
    text-align: center;
    margin-top: 14px;
    font-size: 0.85rem;
    color: var(--text-dim);
}
.auth-link a { color: var(--primary-hover); text-decoration: underline; }

/* ─── Game Header ─────────────────────────────────────────── */
.layout-page,
.mm-page {
    --mm-side-width: clamp(220px, 18vw, 300px);
    width: 100vw;
    margin-left: calc(50% - 50vw);
    min-height: calc(100vh - 140px);
    position: relative;
    display: grid;
    grid-template-columns: var(--mm-side-width) var(--page-center-width) var(--mm-side-width);
    justify-content: center;
    align-content: center;
    gap: 12px;
    padding: 10px 0 20px;
    isolation: isolate;
}

.layout-main,
.mm-stage {
    grid-column: 2;
    grid-row: 1;
    width: var(--page-center-width);
    justify-self: center;
    position: relative;
    z-index: 1;
    --card-w: clamp(80px, 5.5vw, 96px);
    --card-h: calc(var(--card-w) * 1.38);
    padding: 14px;
    background: rgba(20, 8, 4, 0.78);
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(4px);
}

.layout-side,
.mm-panel {
    grid-column: 1;
    grid-row: 1;
    width: var(--mm-side-width);
    justify-self: end;
    align-self: start;
    position: relative;
    z-index: 1;
    padding: 12px 14px;
    background: rgba(20, 8, 4, 0.74);
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(4px);
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    background: rgba(30,15,8,0.6);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 10px 16px;
    backdrop-filter: blur(6px);
}
.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
}
.stat-label { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }
.stat-value { font-size: 1.3rem; font-weight: 700; font-variant-numeric: tabular-nums; }

/* ─── Settings Bar ────────────────────────────────────────── */
.settings-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.setting-group {
    display: flex;
    align-items: center;
    gap: 4px;
}
.setting-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
}
.setting-group select {
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: var(--r);
    background: rgba(30,14,6,0.7);
    color: var(--text);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
}
.setting-group select:focus { border-color: var(--primary); outline: 1px solid var(--primary); }
/* Doubleweakness mode option — gold accent */
option.opt-doubleweakness { color: #d4a017; font-weight: 600; }

/* ─── Scoreboard & Turn Indicator ─────────────────────────── */
.scoreboard {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 14px;
    padding: 8px 20px;
    background: rgba(30,15,8,0.6);
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(6px);
}
.score-side {
    display: flex;
    align-items: center;
    gap: 8px;
}
.score-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
}
.score-num {
    font-size: 1.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.score-player .score-num { color: #e0a050; }
.score-ai .score-num { color: var(--error); }

.turn-indicator {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--r);
    border: 1px solid var(--border);
    min-width: 90px;
    text-align: center;
}
.turn-player {
    background: rgba(192,112,48,0.2);
    color: #e0b070;
    border-color: var(--primary);
}
.turn-ai {
    background: rgba(224,64,64,0.15);
    color: var(--error);
    border-color: var(--error);
    animation: pulse 0.8s ease-in-out infinite alternate;
}
@keyframes pulse {
    from { opacity: 1; }
    to { opacity: 0.6; }
}

/* ─── Card Board ──────────────────────────────────────────── */
.board {
    display: grid;
    gap: 8px;
    justify-content: center;
    perspective: 900px;
}

.card {
    width: var(--card-w);
    height: calc(var(--card-w) * 1.38); /* auto-tracks --card-w so one variable scales both */
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.45s ease;
}

/* ── Doubleweakness (52-pair) scaled card fonts ─────────── */
.board-doubleweakness .poker-tl,
.board-doubleweakness .poker-br {
    font-size: var(--dw-font-sm, 0.65rem);
    line-height: 1.1;
}
.board-doubleweakness .poker-center {
    font-size: var(--dw-font-lg, 1rem);
}
.card.flipped { transform: rotateY(180deg); }
.card.matched { transform: rotateY(180deg); }
.card.matched .card-front {
    border-color: var(--success);
    box-shadow: 0 0 0 2px rgba(26,122,26,0.4);
}

.card-face {
    position: absolute;
    inset: 0;
    border-radius: var(--r);
    display: flex;
    align-items: center;
    justify-content: center;
    backface-visibility: hidden;
    border: 1.5px solid var(--border);
    overflow: hidden;
}

/* ─── Card Back: bronze/brass low-poly mosaic ─────────────── */
.card-back {
    background: #3a2008;
    border-color: #8a6010;
}
.card-back-inner {
    position: absolute;
    inset: 4px;
    border-radius: 1px;
    /* Polygon texture set via JS; fallback to bronze gradient */
    background: var(--card-back-poly,
        linear-gradient(135deg, #5a3a0a 0%, #9a7018 40%, #c09020 60%, #7a5010 100%));
    background-size: cover;
    box-shadow:
        inset 0 0 0 1.5px rgba(255, 210, 80, 0.55),
        inset 0 0 0 4px #3a2008,
        inset 0 0 0 7px rgba(200, 160, 40, 0.30),
        inset 0 0 14px rgba(0, 0, 0, 0.45);
}

/* ─── Card Front: poker face ──────────────────────────────── */
.card-front {
    background: #1a1a1a;
    transform: rotateY(180deg);
    user-select: none;
    flex-direction: column;
}

.card-front[data-color="red"]  { background: #1a1a1a; color: #e63939; }
.card-front[data-color="black"] { background: #1a1a1a; color: #ffffff; }

.poker-tl, .poker-br {
    position: absolute;
    font-size: 1.1rem;
    line-height: 1.1;
    text-align: center;
    font-weight: 700;
}
.poker-tl { top: 3px; left: 5px; }
.poker-br { bottom: 3px; right: 5px; transform: rotate(180deg); }

.poker-center {
    font-size: 2rem;
    line-height: 1;
    font-weight: 400;
}

.card:not(.matched):not(.flipped):hover .card-back {
    border-color: #d4a820;
    box-shadow: 0 0 10px rgba(184, 134, 11, 0.55), 0 2px 8px rgba(0,0,0,0.4);
}

.card.ai-flip {
    box-shadow: 0 0 0 2px var(--error), 0 0 10px rgba(196,43,28,0.25);
}

/* ─── Game Result (inline, no modal) ─────────────────────── */
@keyframes mmFadeUp {
    from { opacity: 0; transform: translateY(10px) scale(0.88); }
    to   { opacity: 1; transform: translateY(0)   scale(1);    }
}
.mm-result {
    text-align: center;
    padding: 22px 0 8px;
    animation: mmFadeUp 0.45s cubic-bezier(0.34, 1.45, 0.64, 1) both;
}
.mm-result-title {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}
.mm-result-title.r-clear { color: var(--primary); }
.mm-result-title.r-win   { color: var(--success); }
.mm-result-title.r-lose  { color: var(--error);   }
.mm-result-title.r-draw  { color: var(--text-dim);}
.mm-result-detail {
    font-size: 0.95rem;
    color: var(--text-dim);
    margin-bottom: 4px;
    min-height: 1.2em;
}
.mm-result-stats {
    font-size: 0.82rem;
    color: var(--text-dim);
    opacity: 0.75;
    margin-bottom: 16px;
    letter-spacing: 0.04em;
}
.mm-result-btn { margin-top: 0; }

/* ─── Leaderboard ─────────────────────────────────────────── */
.leaderboard-section {
    margin-top: 0;
}
.leaderboard-section h3 {
    margin-bottom: 8px;
    font-size: 1rem;
}
.leaderboard {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    border: 1px solid var(--border);
    border-radius: var(--r);
    background: rgba(30,15,8,0.5);
    backdrop-filter: blur(4px);
}
.leaderboard th {
    text-align: left;
    padding: 6px 10px;
    background: rgba(50,25,12,0.5);
    color: var(--text-dim);
    font-weight: 600;
    border-bottom: 1px solid var(--border);
}
.leaderboard td {
    padding: 6px 10px;
    border-bottom: 1px solid rgba(200,130,60,0.15);
}
.leaderboard tr:hover td { background: rgba(200,130,60,0.08); }

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 800px) {
    body::after { display: none; }
    .container { max-width: 100%; }
    .poker-center { font-size: 1.4rem; }
    .poker-tl, .poker-br { font-size: 0.85rem; }
    .game-header { gap: 10px; padding: 8px 10px; }
    /* Allow board to scroll horizontally when it outgrows the container */
    .layout-main {
        --card-w: clamp(58px, 10vw, 80px);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .board { gap: 6px; }
    .layout-page,
    .mm-page {
        grid-template-columns: 1fr;
        width: 100%;
        margin-left: 0;
        min-height: auto;
        padding: 0;
    }
    .layout-main,
    .layout-side,
    .mm-stage,
    .mm-panel {
        grid-column: 1;
        width: 100%;
        justify-self: stretch;
        align-self: auto;
    }
}

/* ─── Home Page ───────────────────────────────────────────── */
.home-header {
    text-align: center;
    margin-bottom: 28px;
}
.home-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}
.game-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.game-card {
    display: block;
    background: rgba(30,15,8,0.65);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 28px 20px;
    text-decoration: none;
    color: var(--text);
    text-align: center;
    transition: border-color 0.15s, box-shadow 0.15s;
    backdrop-filter: blur(6px);
}
.game-card:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 16px rgba(200,130,60,0.2);
}
.game-card-icon { font-size: 2.5rem; margin-bottom: 12px; }
.game-card h2 { font-size: 1.15rem; margin-bottom: 6px; }
.game-card p { font-size: 0.82rem; color: var(--text-dim); line-height: 1.4; }

/* ═══════════════════════════════════════════════════════════ */
/* ─── Number War (凑十对决) ────────────────────────────────── */
/* ═══════════════════════════════════════════════════════════ */

.nw-stage {
    width: var(--page-center-width);
    margin: 0;
    padding: 14px 14px 10px;
    background: rgba(20, 8, 4, 0.78);
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(4px);
}

.nw-page {
    --nw-hand-gap: clamp(8px, calc(var(--page-center-width) * 0.018), 22px);
    --nw-card-w: clamp(72px, calc(var(--page-center-width) * 0.15), 156px);
    --nw-card-h: calc(var(--nw-card-w) * 1.4);
    width: 100vw;
    margin-left: calc(50% - 50vw);
    min-height: calc(100vh - 140px);
    position: relative;
    display: grid;
    grid-template-columns: 1fr var(--page-center-width) 1fr;
    align-content: center;
    justify-items: stretch;
    gap: 10px;
    padding: 6px 0;
    isolation: isolate;
}

.nw-page > .nw-stage,
.nw-page > .nw-actions {
    grid-column: 2;
    justify-self: center;
    position: relative;
    z-index: 1;
}

.nw-hand {
    display: flex;
    justify-content: center;
    gap: var(--nw-hand-gap);
    width: max-content;
    margin: 0 auto;
    padding: 18px 0;
}
.nw-hand-ai {
    width: calc(var(--nw-card-w) * 5 + var(--nw-hand-gap) * 4);
    justify-content: flex-start;
}

.nw-card {
    width: var(--nw-card-w);
    height: var(--nw-card-h);
    position: relative;
    cursor: default;
    transition: transform 0.15s, opacity 0.3s;
}
.nw-card-clickable { cursor: pointer; }
.nw-card-clickable:hover { transform: translateY(-6px); }

/* ── Suit-coloured selection glow ──────────────────────── */
.nw-card-clickable[data-suit-color="red"]:hover {
    box-shadow:
        0 0 0 2px rgba(230, 57, 57, 0.75),
        0 6px 22px rgba(220, 40, 40, 0.6);
    filter: drop-shadow(0 0 9px rgba(230, 57, 57, 0.8));
}
.nw-card-clickable[data-suit-color="black"]:hover {
    box-shadow:
        0 0 0 2px rgba(200, 215, 240, 0.7),
        0 6px 22px rgba(160, 180, 225, 0.5);
    filter: drop-shadow(0 0 9px rgba(200, 215, 240, 0.75));
}

.nw-card-played {
    opacity: 0.2;
    pointer-events: none;
}

.nw-card-face {
    position: absolute;
    inset: 0;
    border-radius: var(--r);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--border);
    overflow: hidden;
}

.nw-card-front {
    background: #1a1a1a;
    user-select: none;
}
.nw-card-front[data-color="red"]  { background: #1a1a1a; color: #e63939; }
.nw-card-front[data-color="black"] { background: #1a1a1a; color: #ffffff; }

.nw-card-back {
    background: #3a2008;
    border-color: #8a6010;
}

.nw-card-empty {
    width: 100%;
    height: 100%;
    border-radius: var(--r);
    border: 2px dashed rgba(200,130,60,0.25);
    background: transparent;
}

.nw-card-ai-active {
    box-shadow: 0 0 0 2px var(--error), 0 0 8px rgba(196,43,28,0.3);
}

/* ─── Field: total + status + history ─────────────────────── */
.nw-field {
    text-align: center;
    height: 140px;
    padding: 10px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.nw-total-wrap {
    margin-bottom: 8px;
}
.nw-total-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}
.nw-total {
    font-size: 3.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1;
    transition: color 0.2s;
}

.nw-total-pulse { animation: nwPulse 0.3s ease; }
.nw-total-overflow { animation: nwShake 0.5s ease; color: var(--error); }
.nw-total-win { animation: nwPulse 0.4s ease; color: var(--success); }

@keyframes nwPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}
@keyframes nwShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-5px); }
    80% { transform: translateX(5px); }
}

.nw-status {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 6px 16px;
    display: inline-block;
    border-radius: var(--r);
    margin-bottom: 10px;
}
.nw-status-player { background: rgba(192,112,48,0.2); color: #e0b070; }
.nw-status-ai { background: rgba(224,64,64,0.15); color: var(--error); animation: pulse 0.8s ease-in-out infinite alternate; }
.nw-status-overflow { background: rgba(230,180,40,0.15); color: #f0d060; }
.nw-status-win { background: rgba(92,204,80,0.15); color: var(--success); }
.nw-status-lose { background: rgba(224,64,64,0.15); color: var(--error); }
.nw-status-draw { background: rgba(192,160,128,0.15); color: var(--text-dim); }

.nw-history {
    max-height: 120px;
    overflow-y: auto;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin: 0 auto;
    max-width: 320px;
    text-align: left;
}
.nw-history-entry {
    padding: 2px 8px;
    border-left: 3px solid #ddd;
    margin-bottom: 2px;
}
.nw-history-win { border-color: var(--success); color: var(--success); font-weight: 600; }
.nw-history-overflow { border-color: #e6a817; color: #856404; font-weight: 600; }

.nw-actions {
    text-align: center;
    width: var(--page-center-width);
    margin: 0 auto;
    padding: 6px 0 0;
    position: relative;
}
.nw-result {
    font-size: 4.5rem;
    font-weight: 700;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    pointer-events: none;
}
.nw-result-win { color: var(--success); }
.nw-result-lose { color: var(--error); }
.nw-result-draw { color: var(--text-dim); }

.nw-btn-group {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.nw-card .poker-tl, .nw-card .poker-br { font-size: clamp(0.9rem, 1.6vw, 1.4rem); }
.nw-card .poker-center { font-size: clamp(1.5rem, 3.2vw, 3.2rem); }

@media (max-width: 560px) {
    .container { max-width: 100%; }
    .nw-total { font-size: 2.5rem; }
    .nw-field { height: 110px; }
    .nw-hand { gap: 6px; padding: 10px 0; }
    .nw-page {
        min-height: calc(100vh - 110px);
        grid-template-columns: 1fr;
        width: 100%;
        margin-left: 0;
        padding: 0;
    }
    .nw-page > .nw-stage,
    .nw-page > .nw-actions {
        grid-column: 1;
        width: 100%;
        justify-self: stretch;
    }
}

/* ═══════════════════════════════════════════════════════════ */
/* ─── Slave King (奴隶国王对决) ────────────────────────────── */
/* ═══════════════════════════════════════════════════════════ */

.sk-page {
    --sk-card-w: clamp(72px, calc(var(--page-center-width) * 0.12), 120px);
    --sk-card-h: calc(var(--sk-card-w) * 1.4);
    --sk-hand-gap: clamp(8px, calc(var(--page-center-width) * 0.02), 20px);
    width: 100vw;
    margin-left: calc(50% - 50vw);
    min-height: calc(100vh - 140px);
    position: relative;
    display: grid;
    grid-template-columns: 1fr var(--page-center-width) 1fr;
    align-content: center;
    justify-items: stretch;
    gap: 10px;
    padding: 6px 0;
    isolation: isolate;
}

.sk-page > .sk-stage,
.sk-page > .sk-actions {
    grid-column: 2;
    justify-self: center;
    position: relative;
    z-index: 1;
}

.sk-stage {
    width: var(--page-center-width);
    padding: 14px 14px 10px;
    background: rgba(20, 8, 4, 0.78);
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(4px);
}

/* ── Scoreboard ─────────────────────────────────────────── */
.sk-scoreboard {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 12px;
    padding: 8px 20px;
    background: rgba(30, 15, 8, 0.6);
    border: 1px solid var(--border);
    border-radius: var(--r);
    backdrop-filter: blur(6px);
}

.sk-score-side {
    display: flex;
    align-items: center;
    gap: 8px;
}
.sk-score-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
}
.sk-score-num {
    font-size: 1.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.sk-score-player .sk-score-num { color: #e0a050; }
.sk-score-ai .sk-score-num     { color: var(--error); }

.sk-round-info {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: var(--r);
    border: 1px solid var(--border);
    text-align: center;
    color: var(--text-dim);
    min-width: 110px;
}

/* ── Hands ──────────────────────────────────────────────── */
.sk-hand {
    display: flex;
    justify-content: center;
    gap: var(--sk-hand-gap);
    padding: 10px 0;
    min-height: calc(var(--sk-card-h) + 20px);
}

/* ── Cards (poker style + 3D flip) ─────────────────────── */
.sk-card {
    width: var(--sk-card-w);
    height: var(--sk-card-h);
    position: relative;
    cursor: default;
    flex-shrink: 0;
}
.sk-card-clickable {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
}
.sk-card-clickable:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

/* ── Card-type selection glow ──────────────────────────── */
.sk-card-clickable[data-type="emperor"]:hover {
    box-shadow:
        0 0 0 2px rgba(212, 160, 23, 0.8),
        0 8px 26px rgba(212, 160, 23, 0.6);
    filter: drop-shadow(0 0 10px rgba(212, 160, 23, 0.85));
}
.sk-card-clickable[data-type="citizen"]:hover {
    box-shadow:
        0 0 0 2px rgba(185, 200, 235, 0.7),
        0 8px 26px rgba(160, 178, 220, 0.5);
    filter: drop-shadow(0 0 10px rgba(185, 200, 235, 0.75));
}
.sk-card-clickable[data-type="slave"]:hover {
    box-shadow:
        0 0 0 2px rgba(220, 45, 45, 0.8),
        0 8px 26px rgba(200, 35, 35, 0.6);
    filter: drop-shadow(0 0 10px rgba(220, 45, 45, 0.85));
}
.sk-card-dragging {
    opacity: 0.35;
    transform: scale(0.92) !important;
}

/* Shared face base */
.sk-card-face {
    position: absolute;
    inset: 0;
    border-radius: var(--r);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--border);
    overflow: hidden;
    user-select: none;
}

/* Front face — poker layout, dark bg + colored text */
.sk-card-front {
    background: #1a1a1a;
}
.sk-type-emperor { color: #d4a017; border-color: #a07810; }
.sk-type-slave   { color: #e63939; border-color: #a02828; }
.sk-type-citizen { color: #ffffff; }

/* Back face — black-white checkerboard, red trim */
.sk-card-back {
    background: #3a2008;
    border-color: #8a6010;
}

/* Poker corner / center sizing for sk-cards */
.sk-card .poker-tl, .sk-card .poker-br {
    font-size: clamp(0.9rem, 1.6vw, 1.4rem);
}
.sk-card .poker-center {
    font-size: clamp(1.5rem, 3vw, 2.8rem);
}

/* ── 3D flip (field cards only) ─────────────────────────── */
.sk-card-inner {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}
.sk-card.sk-flipped .sk-card-inner {
    transform: rotateY(180deg);
}
.sk-card-inner > .sk-card-face {
    backface-visibility: hidden;
}
.sk-card-inner > .sk-card-front {
    transform: rotateY(180deg);
}

/* ── Battle field (vertical face-off) ───────────────────── */
.sk-field {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 10px;
    min-height: calc(var(--sk-card-h) * 2 + 60px);
}

.sk-field-card {
    width: var(--sk-card-w);
    height: var(--sk-card-h);
    border: 2px dashed rgba(200, 130, 60, 0.3);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
    position: relative;
}

.sk-field-empty {
    font-size: 0.72rem;
    color: var(--text-dim);
    text-align: center;
    line-height: 1.5;
    opacity: 0.6;
}

.sk-field-winner {
    box-shadow: 0 0 14px rgba(92, 204, 80, 0.35);
}

.sk-dropzone-active {
    border-color: var(--primary) !important;
    background: rgba(192, 112, 48, 0.12);
    box-shadow: 0 0 18px rgba(192, 112, 48, 0.3);
}

.sk-field-mid {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.sk-field-vs {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-dim);
    text-align: center;
    line-height: 1;
    transition: color 0.3s, transform 0.3s;
}
.sk-vs-win  { color: var(--success); transform: scale(1.3); }
.sk-vs-lose { color: var(--error);   transform: scale(1.3); }
.sk-vs-draw { color: var(--text-dim); }

.sk-final {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 4.5rem;
    font-weight: 700;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.4s ease-out;
    pointer-events: none;
}
#sk-final-left  { right: calc(50% + 70px); }
#sk-final-right { left:  calc(50% + 70px); }
.sk-final.active { opacity: 1; }
.sk-final-win  { color: var(--success); }
.sk-final-lose { color: var(--error); }
.sk-final-draw { color: var(--text-dim); }

/* ── Status ─────────────────────────────────────────────── */
.sk-status {
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 8px 16px;
    margin: 4px 0;
    border-radius: var(--r);
    transition: background 0.3s, color 0.3s;
}
.sk-status-thinking {
    color: var(--text-dim);
    animation: pulse 0.8s ease-in-out infinite alternate;
}
.sk-status-win  { background: rgba(92, 204, 80, 0.15);  color: var(--success); }
.sk-status-lose { background: rgba(224, 64, 64, 0.15);  color: var(--error); }
.sk-status-draw { background: rgba(192, 160, 128, 0.15); color: var(--text-dim); }

/* ── Actions / result ───────────────────────────────────── */
.sk-actions {
    text-align: center;
    width: var(--page-center-width);
    margin: 0 auto;
    padding: 6px 0 0;
    position: relative;
}
.sk-btn-group {
    display: flex;
    justify-content: center;
    gap: 10px;
}

/* ── Card in field slot (fills the dashed box) ──────────── */
.sk-card-field {
    width: 100%;
    height: 100%;
}
.sk-card-field > .sk-card-face,
.sk-card-field > .sk-card-inner {
    position: absolute;
    inset: 0;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 560px) {
    .sk-page {
        grid-template-columns: 1fr;
        width: 100%;
        margin-left: 0;
        padding: 0;
    }
    .sk-page > .sk-stage,
    .sk-page > .sk-actions {
        grid-column: 1;
        width: 100%;
        justify-self: stretch;
    }
    .sk-hand { gap: 6px; }
    .sk-field { gap: 4px; padding: 6px; }
    .sk-scoreboard { gap: 10px; padding: 6px 10px; }
}

/* ── Memory Match: compact cards on phones ─────────────── */
@media (max-width: 480px) {
    .layout-main {
        --card-w: 48px;
        padding: 8px;
    }
    .board { gap: 4px; }
    .poker-center { font-size: 1.1rem; }
    .poker-tl, .poker-br { font-size: 0.65rem; }
    .stat-value { font-size: 1.05rem; }
    .game-header { padding: 6px 8px; gap: 8px; }
    .settings-bar { gap: 8px; }
}