/* ==================== 全局样式 ==================== */
:root {
    /* Darts Theme - Based on Logo Colors */
    --primary-gradient: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    --primary-color: #e74c3c;
    --primary-hover: #c0392b;
    --secondary-gradient: linear-gradient(135deg, #2c3e50 0%, #1a252f 100%);
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #3498db;

    --bg-body: #0d1217;
    --bg-card: #1a252f;
    --bg-hover: #2c3e50;
    --bg-input: #141c24;

    --text-primary: #ffffff;
    --text-secondary: #bdc3c7;
    --text-muted: #7f8c8d;

    --border-color: #34495e;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.6);

    --accent-gold: #f1c40f;
    --accent-green: #27ae60;
    --accent-blue: #3498db;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 12px;
}

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

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    box-sizing: border-box;
}

/* ==================== 容器 ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-lg {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 头部导航 ==================== */
.header {
    background: linear-gradient(to bottom, #1a252f, #0d1217);
    border-bottom: 1px solid var(--border-color);
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 22px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.nav {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav a {
    color: #a0a0a0;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 14px;
}

.nav a:hover {
    background: var(--primary-color);
    color: #ffffff;
    transform: translateY(-1px);
}

.nav span {
    padding: 8px 16px;
    font-weight: 500;
    font-size: 14px;
    color: #a0a0a0;
}

/* ==================== 主体内容 ==================== */
.main {
    padding: 40px 0;
    min-height: calc(100vh - 200px);
}

/* ==================== 页面头部 ==================== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    margin-bottom: 24px;
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--border-color);
}

.card-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin: 0;
}

.card-body {
    color: var(--text-secondary);
}

/* ==================== 统计卡片 ==================== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    padding: 24px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
}

.stat-card:hover {
    background: var(--bg-hover);
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.stat-card h3 {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-card p {
    color: var(--text-secondary);
    font-size: 13px;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    gap: 6px;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    background: #219150;
}

.btn-warning {
    background: var(--warning-color);
    color: var(--text-primary);
}

.btn-warning:hover {
    background: #e67e22;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: #2c3e50;
    color: #bdc3c7;
}

.btn-secondary:hover {
    background: #34495e;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    display: flex;
}

/* ==================== 表格样式 ==================== */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table th,
.table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--bg-input);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    color: var(--text-secondary);
    font-size: 14px;
}

.table tbody tr:hover {
    background: var(--bg-hover);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ==================== 表单样式 ==================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    color: var(--text-primary);
    background: var(--bg-input);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(90, 90, 90, 0.1);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

/* ==================== 状态标签 ==================== */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    gap: 4px;
}

.status-draft {
    background: #95a5a6;
    color: #ffffff;
}

.status-registration {
    background: #3498db;
    color: #ffffff;
}

.status-drawing {
    background: var(--warning-color);
    color: #ffffff;
}

.status-ongoing {
    background: var(--warning-color);
    color: #ffffff;
}

.status-completed {
    background: var(--success-color);
    color: #ffffff;
}

/* ==================== 提示框 ==================== */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.alert-success {
    background: #1e3a2e;
    color: #2ecc71;
    border-left: 4px solid var(--success-color);
}

.alert-error {
    background: #3a1e1e;
    color: #e74c3c;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: #3a2e1e;
    color: #f39c12;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: #1e2e3a;
    color: #3498db;
    border-left: 4px solid var(--info-color);
}

/* ==================== 比赛卡片网格 ==================== */
.match-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.match-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.match-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.match-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.match-card h3 {
    color: var(--primary-color);
    margin-bottom: 16px;
    font-size: 18px;
    font-weight: 600;
}

.match-info {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 2;
}

.match-info p {
    margin: 4px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ==================== 英雄区域 ==================== */
.hero {
    text-align: center;
    padding: 60px 40px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-xl);
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero p {
    font-size: 18px;
    opacity: 0.95;
    margin: 0;
}

/* ==================== 页脚 ==================== */
.footer {
    background: #1a202c;
    color: white;
    text-align: center;
    padding: 24px 0;
    margin-top: 40px;
}

.footer p {
    margin: 0;
    color: #a0aec0;
    font-size: 14px;
}

/* ==================== 登录框 ==================== */
.login-box {
    background: var(--bg-card);
    padding: 48px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
}

.login-box h1 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 32px;
    font-size: 28px;
}

.links {
    text-align: center;
    margin-top: 24px;
    color: var(--text-secondary);
    font-size: 14px;
}

.links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.links a:hover {
    text-decoration: underline;
}

/* ==================== 比赛对阵表格 ==================== */
.matches-table {
    width: 100%;
    border-collapse: collapse;
}

.matches-table th,
.matches-table td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.matches-table th {
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
}

.matches-table td {
    font-size: 14px;
}

.score-input {
    width: 60px;
    padding: 8px;
    text-align: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.score-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.score-input:read-only {
    background: var(--bg-input);
    cursor: default;
}

.player-name {
    text-align: left;
    font-weight: 500;
}

.vs {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 600;
}

/* ==================== 轮次标题 ==================== */
.round-title {
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 700;
    margin: 40px 0 24px 0;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ==================== 小组区域 ==================== */
.group-section {
    margin-bottom: 32px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
}

.group-title {
    background: var(--primary-gradient);
    color: white;
    padding: 20px 24px;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.group-title span {
    font-size: 18px;
}

.group-stats {
    font-size: 14px;
    opacity: 0.95;
    background: rgba(255, 255, 255, 0.2);
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 500;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .header h1 {
        font-size: 18px;
    }
    
    .nav a {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .main {
        padding: 24px 0;
    }
    
    .page-header h2 {
        font-size: 22px;
    }
    
    .hero {
        padding: 40px 20px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .match-list {
        grid-template-columns: 1fr;
    }
    
    .login-box {
        padding: 32px 24px;
    }
    
    .table {
        font-size: 13px;
    }
    
    .table th,
    .table td {
        padding: 12px 8px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }

    /* 移动端表单输入框优化 */
    .form-group input[type="text"],
    .form-group input[type="password"],
    .form-group input[type="email"],
    .form-group input[type="number"],
    .form-group input[type="date"],
    .form-group input[type="datetime-local"],
    .form-group input[type="tel"],
    .form-group select,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 14px;
        width: 75% !important;
    }

    .form-group textarea {
        min-height: 80px;
    }

    .form-group {
        margin-bottom: 16px;
    }

    .form-group label {
        font-size: 13px;
        margin-bottom: 6px;
    }
}

@media (max-width: 480px) {
    .header .container {
        flex-direction: column;
        gap: 12px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    /* 小屏幕表单输入框进一步优化 */
    .form-group input[type="text"],
    .form-group input[type="password"],
    .form-group input[type="email"],
    .form-group input[type="number"],
    .form-group input[type="date"],
    .form-group input[type="datetime-local"],
    .form-group input[type="tel"],
    .form-group select,
    .form-group textarea {
        padding: 8px 10px;
        font-size: 13px;
        width: 75% !important;
    }

    .form-group select {
        padding-right: 32px;
    }

    .form-group textarea {
        min-height: 70px;
    }

    .form-group {
        margin-bottom: 14px;
    }

    .form-group label {
        font-size: 12px;
        margin-bottom: 5px;
    }
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }