/* ===== 基础样式 ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
    background: #f5f5f5;
    color: #333;
    min-height: 100vh;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 页头 ===== */
header {
    text-align: center;
    padding: 30px 0 20px;
}

.site-title {
    font-size: 2rem;
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s;
}

.site-title:hover {
    color: #2980b9;
}

/* ===== 主体 ===== */
main {
    flex: 1;
    padding: 20px 0;
}

/* ===== 页脚（备案号） ===== */
footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #ddd;
    margin-top: auto;
}

footer a {
    color: #999;
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s;
}

footer a:hover {
    color: #2980b9;
}

/* ===== 欢迎页 ===== */
.welcome {
    text-align: center;
    padding: 40px 20px;
}

.welcome h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    color: #2c3e50;
}

.welcome-text {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.8;
}

/* ===== 入口卡片 ===== */
.entries {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 20px 0;
}

.entry-card {
    display: block;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 40px 36px;
    text-align: center;
    width: 280px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s, box-shadow 0.3s;
}

.entry-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}

.entry-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.entry-card p {
    font-size: 0.95rem;
    color: #888;
    margin-bottom: 24px;
}

.entry-card .btn {
    display: inline-block;
    padding: 10px 36px;
    background: #2980b9;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.3s, transform 0.2s;
}

.entry-card .btn:hover {
    background: #3498db;
    transform: translateY(-1px);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 10px 28px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.3s, transform 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: #2980b9;
    color: #fff;
    font-weight: 600;
}

.btn-primary:hover {
    background: #3498db;
}

.btn-back {
    background: #ecf0f1;
    color: #555;
    margin-top: 20px;
}

.btn-back:hover {
    background: #dfe4e6;
}

.btn-game {
    background: #27ae60;
    color: #fff;
    font-weight: 600;
}

.btn-game:hover {
    background: #2ecc71;
}

.btn-game:disabled {
    background: #bdc3c7;
    color: #95a5a6;
    cursor: not-allowed;
}

.btn-bid {
    background: #2980b9;
    color: #fff;
    margin: 4px;
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-bid:hover {
    background: #3498db;
}

.btn-pass {
    background: #95a5a6;
    color: #fff;
}

.btn-pass:hover {
    background: #7f8c8d;
}

/* ===== 个人信息 ===== */
.info-section {
    text-align: center;
    padding: 30px 20px;
}

.info-section h2 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 30px;
}

.info-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 30px;
    max-width: 400px;
    margin: 0 auto;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table th {
    text-align: right;
    padding: 12px 16px;
    color: #2980b9;
    font-weight: 600;
    width: 30%;
}

.info-table td {
    text-align: left;
    padding: 12px 16px;
    color: #333;
}

/* ===== 游戏区域通用 ===== */
.game-section {
    text-align: center;
    padding: 20px;
}

.game-section h2 {
    font-size: 1.6rem;
    color: #2c3e50;
    margin-bottom: 20px;
}

.game-controls {
    margin-bottom: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.game-area {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.player-area {
    padding: 12px 0;
}

.player-area h3 {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 12px;
}

.score {
    color: #2980b9;
    font-weight: 700;
}

.cards-row {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    min-height: 100px;
    align-items: center;
}

/* ===== 纸牌样式 ===== */
.card {
    width: 70px;
    height: 100px;
    background: #fff;
    color: #1a1a2e;
    border-radius: 8px;
    border: 1px solid #ddd;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 1px 1px 6px rgba(0, 0, 0, 0.12);
    position: relative;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-4px);
}

.card.red {
    color: #c0392b;
}

.card.back {
    background: linear-gradient(135deg, #2980b9, #3498db);
    color: transparent;
}

.card.back::after {
    content: "🂠";
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.6);
}

.card .rank {
    font-size: 1.4rem;
    line-height: 1;
}

.card .suit {
    font-size: 1.6rem;
    line-height: 1;
}

/* 玩家手牌可选择 */
#your-cards .card {
    cursor: pointer;
    border: 2px solid #ddd;
}

#your-cards .card:hover {
    border-color: #2980b9;
}

#your-cards .card.played {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== 游戏结果 ===== */
.game-result {
    font-size: 1.3rem;
    font-weight: 700;
    padding: 16px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.game-result.win {
    color: #27ae60;
}

.game-result.lose {
    color: #e74c3c;
}

.game-result.push {
    color: #e67e22;
}

.divider {
    border-top: 1px solid #eee;
    margin: 20px 0;
}

/* ===== 桥牌网格牌桌 ===== */
.bridge-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.bridge-header h2 {
    margin-bottom: 0;
}

.status, .hint {
    color: #888;
    line-height: 1.7;
    margin-bottom: 12px;
}

.back-row {
    text-align: center;
    margin-top: 20px;
}

.scoreboard {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 16px;
}

.score-item {
    color: #555;
    font-size: 0.95rem;
}

.score-item strong {
    color: #2980b9;
}

.bridge-layout {
    display: grid;
    grid-template-columns: 1fr minmax(320px, 1.2fr) 1fr;
    grid-template-rows: auto minmax(220px, auto) auto;
    grid-template-areas:
        ". north ."
        "west center east"
        ". south .";
    gap: 18px;
    margin: 18px 0;
    align-items: stretch;
}

.bridge-seat, .bridge-center {
    border-radius: 16px;
    background: #fff;
    border: 1px solid #e8e8e8;
    padding: 16px;
    min-height: 120px;
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.bridge-seat h3 {
    font-size: 1rem;
    color: #2c3e50;
    margin: 0 0 10px;
}

.north { grid-area: north; }
.west  { grid-area: west;  }
.east  { grid-area: east;  }
.south { grid-area: south; }

.bridge-center {
    grid-area: center;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 14px;
    min-height: 260px;
}

.center-label {
    font-weight: 700;
    color: #2980b9;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.trick-box {
    display: grid;
    grid-template-columns: repeat(2, minmax(80px, 1fr));
    gap: 12px;
    width: 100%;
}

.trick-item {
    min-height: 64px;
    border-radius: 12px;
    background: #f0f6ff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 2px;
}

.trick-item strong {
    color: #555;
    font-size: 0.8rem;
}

.trick-item span {
    font-weight: 700;
    font-size: 1rem;
    color: #2c3e50;
}

/* 牌面样式（桥牌用） */
.playing-card {
    width: 60px;
    min-height: 82px;
    border-radius: 12px;
    background: linear-gradient(180deg, #ffffff, #f0f5ff);
    color: #1a1a2e;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    border: 1px solid #e0e0e0;
    transition: transform 0.2s;
}

.playing-card.back {
    background: linear-gradient(180deg, #dbeafe, #bfdbfe);
    color: #1d4ed8;
    font-size: 0.75rem;
}

.compact .playing-card {
    width: 50px;
    min-height: 68px;
    font-size: 0.85rem;
}

.card-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    min-height: 72px;
    margin-top: 6px;
}

.playable .playing-card {
    cursor: pointer;
}

.playable .playing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 22px rgba(41, 128, 185, 0.2);
    border-color: #2980b9;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .entries {
        flex-direction: column;
        align-items: center;
    }

    .entry-card {
        width: 100%;
        max-width: 340px;
    }

    .bridge-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "north"
            "west"
            "center"
            "east"
            "south";
    }

    .playing-card {
        width: 50px;
        min-height: 68px;
        font-size: 0.85rem;
    }

    .card {
        width: 56px;
        height: 80px;
        font-size: 1rem;
    }

    .card .rank {
        font-size: 1.1rem;
    }

    .card .suit {
        font-size: 1.3rem;
    }
}