/* ================================================================
   PHP 发卡卡密兑换系统 - 全局样式
   响应式设计，支持 PC / 手机 / 平板
   ================================================================ */

:root {
    --primary: #4A90E2;
    --primary-dark: #357ABD;
    --primary-light: #E6F1FB;
    --purple: #667EEA;
    --bg: #F4F6FA;
    --card: #FFFFFF;
    --border: #E2E8F0;
    --text: #1A202C;
    --text-secondary: #718096;
    --text-muted: #A0AEC0;
    --success: #48BB78;
    --success-bg: #E6F7EE;
    --danger: #E53E3E;
    --danger-bg: #FEF2F2;
    --warning: #ED8936;
    --warning-bg: #FFFBEB;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

/* 通用容器 */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 16px;
}

/* 顶部导航 */
.header {
    background: linear-gradient(135deg, var(--primary), var(--purple));
    color: #fff;
    padding: 24px 0 48px;
    position: relative;
    overflow: hidden;
}
.header::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 40px;
    background: var(--bg);
    border-radius: 50% 50% 0 0;
}
.header-inner { text-align: center; }
.header h1 { font-size: 22px; font-weight: 600; letter-spacing: 1px; }
.header p { font-size: 13px; opacity: 0.85; margin-top: 6px; }

/* 卡片 */
.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    padding: 28px 28px 32px;
    margin-top: -28px;
    position: relative;
    z-index: 1;
}

/* 标签切换 */
.tabs {
    display: flex;
    gap: 0;
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 24px;
}
.tab-btn {
    flex: 1;
    padding: 10px;
    text-align: center;
    border: none;
    background: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.tab-btn.active {
    background: var(--card);
    color: var(--primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
.tab-btn:hover:not(.active) { color: var(--text); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 表单 */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}
.form-group label .req { color: var(--danger); margin-left: 2px; }

.input-wrap { position: relative; }
.input {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    color: var(--text);
    background: var(--card);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    -webkit-appearance: none;
}
.input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74,144,226,0.12);
}
.input.error { border-color: var(--danger); }
.input.success { border-color: var(--success); }

select.input {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23718096' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 13px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    width: 100%;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--purple));
    color: #fff;
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(74,144,226,0.35);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary-light);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
    width: auto;
}

/* 提示信息 */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 20px;
    display: none;
    align-items: flex-start;
    gap: 10px;
}
.alert.show { display: flex; }
.alert-icon { flex-shrink: 0; font-size: 18px; margin-top: 1px; }
.alert-success {
    background: var(--success-bg);
    color: #276749;
    border: 1px solid #C6F6D5;
}
.alert-danger {
    background: var(--danger-bg);
    color: #9B1C1C;
    border: 1px solid #FED7D7;
}
.alert-warning {
    background: var(--warning-bg);
    color: #744210;
    border: 1px solid #FEEBC8;
}
.alert-info {
    background: var(--primary-light);
    color: #1A365D;
    border: 1px solid #BEE3F8;
}

/* 状态徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.badge-pending  { background: var(--warning-bg); color: #744210; }
.badge-processing { background: var(--primary-light); color: #1A365D; }
.badge-completed { background: var(--success-bg); color: #276749; }
.badge-rejected  { background: var(--danger-bg); color: #9B1C1C; }

/* 订单信息展示 */
.order-box {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-top: 20px;
}
.order-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}
.order-row:last-child { border-bottom: none; }
.order-label { color: var(--text-secondary); }
.order-value { font-weight: 500; font-family: monospace; color: var(--text); }

/* 分割线 */
.divider {
    text-align: center;
    position: relative;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: 12px;
}
.divider::before {
    content: '';
    position: absolute;
    top: 50%; left: 0; right: 0;
    height: 1px;
    background: var(--border);
}
.divider span {
    position: relative;
    background: var(--card);
    padding: 0 12px;
}

/* 底部 */
.footer {
    text-align: center;
    padding: 32px 16px;
    color: var(--text-muted);
    font-size: 12px;
}
.footer a { color: var(--primary); text-decoration: none; }

/* 加载动画 */
.spinner {
    width: 18px; height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    display: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 响应式 */
@media (max-width: 480px) {
    .card { padding: 20px 16px 24px; }
    .header h1 { font-size: 19px; }
}

/* 后台管理样式 */
.admin-wrap {
    min-height: 100vh;
    background: #F0F2F5;
    display: flex;
}
.admin-sidebar {
    width: 220px;
    background: #1A1C23;
    color: #fff;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}
.admin-logo {
    padding: 20px;
    font-size: 15px;
    font-weight: 600;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    letter-spacing: 0.5px;
}
.admin-nav { flex: 1; padding: 12px 0; }
.admin-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 14px;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
.admin-nav a:hover { color: #fff; background: rgba(255,255,255,0.05); }
.admin-nav a.active {
    color: #fff;
    background: rgba(74,144,226,0.15);
    border-left-color: var(--primary);
}
.admin-nav a .icon { width: 18px; text-align: center; }

.admin-main { flex: 1; overflow: hidden; }
.admin-topbar {
    background: #fff;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #E8E8E8;
}
.admin-topbar-left { font-size: 14px; color: var(--text-secondary); }
.admin-topbar-right { display: flex; align-items: center; gap: 12px; }
.admin-topbar-right a { color: var(--text-secondary); text-decoration: none; font-size: 13px; }
.admin-topbar-right a:hover { color: var(--danger); }

.admin-content { padding: 24px; }

.page-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}
.stat-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--text); }
.stat-sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.admin-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 20px;
}
.admin-card-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 表格 */
.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
thead th {
    text-align: left;
    padding: 10px 12px;
    background: var(--bg);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tbody td {
    padding: 12px;
    border-bottom: 1px solid #F5F5F5;
    color: var(--text);
}
tbody tr:hover { background: #FAFBFC; }
tbody tr:last-child td { border-bottom: none; }

.copy-btn {
    background: none;
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
    transition: all 0.15s;
}
.copy-btn:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 20px;
}
.pagination a, .pagination span {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    text-decoration: none;
    border: 1px solid var(--border);
    color: var(--text);
    background: #fff;
    transition: all 0.15s;
}
.pagination a:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 登录页 */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1A1C23, #2D3250);
    padding: 20px;
}
.login-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}
.login-title {
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}
.login-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 32px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}
.empty-state .icon { font-size: 48px; margin-bottom: 12px; opacity: 0.4; }
.empty-state p { font-size: 14px; }

/* 加载遮罩 */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}
.loading-overlay.show { display: flex; }
.loading-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

/* 后台管理 - 移动端适配 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
    margin-right: 16px;
    color: var(--text-secondary);
    vertical-align: middle;
    padding: 4px;
}
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: inline-block !important;
    }
    .admin-wrap {
        display: block !important; /* 取消 flex 布局，防止右侧被挤压 */
    }
    .admin-sidebar {
        position: fixed !important;
        left: -260px !important;
        top: 0;
        bottom: 0;
        z-index: 1000;
        width: 240px !important;
        transition: left 0.3s ease;
        box-shadow: 2px 0 8px rgba(0,0,0,0.1);
    }
    .admin-sidebar.show {
        left: 0 !important;
    }
    .sidebar-overlay.show {
        display: block !important;
    }
    .admin-main {
        width: 100% !important;
    }
    .admin-topbar {
        padding: 0 16px !important;
    }
    .admin-content {
        padding: 16px !important;
    }
    .admin-card {
        padding: 16px !important;
    }
    .stat-grid {
        grid-template-columns: 1fr !important;
    }
    .table-wrap {
        margin: 0 -16px !important;
        padding: 0 16px !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
    }
    table {
        min-width: 600px !important;
    }
}