/* ============================================================
   双色球多维消元系统 — 界面样式
   简洁专业的后台管理风格，适合彩票数据分析场景
   ============================================================ */

/* 基础重置与变量 */
:root {
    --color-primary:   #c0392b;
    --color-primary-dk: #a93226;
    --color-accent:    #e74c3c;
    --color-bg:        #f5f6fa;
    --color-surface:   #ffffff;
    --color-border:    #dcdde1;
    --color-text:      #2c3e50;
    --color-text-muted:#7f8c8d;
    --color-success:   #27ae60;
    --color-warning:   #f39c12;
    --color-info:      #2980b9;
    --color-danger:    #c0392b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,.10);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dk); text-decoration: underline; }

/* ========== 登录页专属 ========== */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #c0392b 0%, #8e1920 50%, #5a0f15 100%);
    padding: 20px;
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}

.login-card h1 {
    text-align: center;
    font-size: 22px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}
.login-card .subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-bottom: 32px;
    font-size: 13px;
}

/* ========== 表单 ========== */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--color-text);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(192,57,43,.1);
}
.form-group textarea {
    min-height: 140px;
    resize: vertical;
    font-family: "SF Mono", "Consolas", "Monaco", monospace;
    font-size: 13px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 22px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-primary-dk);
    text-decoration: none;
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}
.btn-success { background: var(--color-success); color: #fff; }
.btn-success:hover { background: #219a52; color: #fff; text-decoration: none; }
.btn-warning { background: var(--color-warning); color: #fff; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ========== 页面布局 ========== */
.app-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}
.app-header .logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
}
.app-header .logo small {
    font-weight: 400;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-left: 8px;
}
.app-header .user-area {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
}
.app-header .user-area .role-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
}
.role-badge.admin { background: #fdecea; color: var(--color-danger); }
.role-badge.user  { background: #e8f4fd; color: var(--color-info); }

/* 侧边导航 + 内容区 */
.app-body {
    display: flex;
    min-height: calc(100vh - 56px);
}
.sidebar {
    width: 200px;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    padding: 16px 0;
    flex-shrink: 0;
}
.sidebar a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 24px;
    color: var(--color-text);
    font-size: 14px;
    transition: var(--transition);
    border-left: 3px solid transparent;
    text-decoration: none;
}
.sidebar a:hover,
.sidebar a.active {
    background: #fdf2f2;
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    text-decoration: none;
}
.sidebar .nav-section {
    padding: 16px 24px 6px;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: .5px;
}

/* 主内容 */
.main-content {
    flex: 1;
    padding: 24px;
    overflow-x: auto;
}
.page-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--color-text);
}
.page-title small {
    font-weight: 400;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-left: 10px;
}

/* ========== 卡片 ========== */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}
.card-header {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}
.card-header .card-action {
    float: right;
    font-weight: 400;
    font-size: 13px;
}

/* ========== 统计卡片行 ========== */
.stat-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}
.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}
.stat-card .stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ========== 表格 ========== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.data-table th {
    background: #fafafa;
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}
.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}
.data-table tr:hover td { background: #fdf2f2; }
.data-table .empty-row td {
    text-align: center;
    padding: 40px;
    color: var(--color-text-muted);
}

/* ========== 号码球显示 ========== */
.ball-row {
    display: flex;
    gap: 6px;
    align-items: center;
}
.ball {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
}
.ball.red { background: linear-gradient(135deg, #e74c3c, #c0392b); }
.ball.blue { background: linear-gradient(135deg, #3498db, #2471a3); }

/* ========== 过滤步骤进度条 ========== */
.filter-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 16px 0;
}
.filter-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: #fafafa;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}
.filter-step .step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
}
.filter-step .step-info { flex: 1; font-size: 13px; }
.filter-step .step-count {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 13px;
}

/* ========== 消息提示 ========== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.alert-success { background: #eafaf1; color: #1e8449; border: 1px solid #a9dfbf; }
.alert-error   { background: #fdecea; color: #922b21; border: 1px solid #f5b7b1; }
.alert-warning { background: #fef9e7; color: #7d6608; border: 1px solid #f9e79f; }
.alert-info    { background: #e8f4fd; color: #1a5276; border: 1px solid #aed6f1; }

/* ========== 热/温/冷标签 ========== */
.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 500; }
.tag-hot  { background: #fdecea; color: #c0392b; }
.tag-warm { background: #fef9e7; color: #b9770e; }
.tag-cold { background: #e8f4fd; color: #2471a3; }

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .app-body { flex-direction: column; }
    .stat-row { grid-template-columns: repeat(2, 1fr); }
    .main-content { padding: 16px; }
    .card { padding: 16px; }
}