/* ============================================================
   算百字工具箱 管理后台样式
   白黑蓝配色主题
   ============================================================ */

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

:root {
    --color-primary: #1a73e8;
    --color-primary-dark: #1557b0;
    --color-primary-light: #e8f0fe;
    --color-text: #1f1f1f;
    --color-text-secondary: #5f6368;
    --color-text-dim: #9aa0a6;
    --color-border: #dadce0;
    --color-bg: #f8f9fa;
    --color-white: #fff;
    --color-success: #34a853;
    --color-danger: #ea4335;
    --color-warning: #fbbc04;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --sidebar-width: 220px;
}

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

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

/* ============================================================
   登录页
   ============================================================ */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
}

.login-box {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    width: 100%;
    max-width: 360px;
}

.login-header { text-align: center; margin-bottom: 30px; }
.login-header h1 { font-size: 22px; color: var(--color-text); margin-bottom: 4px; }
.login-header p { color: var(--color-text-secondary); font-size: 14px; }
.login-hint { text-align: center; color: var(--color-text-dim); font-size: 12px; margin-top: 16px; }

/* ============================================================
   后台主框架布局
   ============================================================ */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--color-white);
    border-right: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 20px 16px;
    border-bottom: 1px solid var(--color-border);
}
.sidebar-header h2 { font-size: 16px; color: var(--color-text); }
.sidebar-header p { font-size: 12px; color: var(--color-text-dim); }

.nav-menu { list-style: none; padding: 8px 0; }
.nav-menu li a {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
.nav-menu li a:hover { background: var(--color-primary-light); color: var(--color-primary); }
.nav-menu li a.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    font-weight: 600;
}
.nav-menu .nav-section {
    padding: 12px 16px 4px;
    font-size: 11px;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.topbar {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 99;
}
.topbar h1 { font-size: 18px; color: var(--color-text); font-weight: 600; }
.topbar .user-info { display: flex; align-items: center; gap: 12px; }
.topbar .user-info span { color: var(--color-text-secondary); font-size: 13px; }

.content-area { padding: 24px; flex: 1; }

/* ============================================================
   卡片
   ============================================================ */
.card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}
.card-header h3 { font-size: 16px; color: var(--color-text); }
.card-actions { display: flex; gap: 8px; align-items: center; }

/* ============================================================
   统计卡片
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}
.stat-card .stat-label { color: var(--color-text-secondary); font-size: 13px; margin-bottom: 8px; }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--color-text); }
.stat-card .stat-sub { font-size: 12px; color: var(--color-text-secondary); margin-top: 6px; }
.stat-card .stat-link { font-size: 12px; color: var(--color-primary); margin-top: 8px; display: block; }

/* ============================================================
   表单
   ============================================================ */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; color: var(--color-text); font-size: 13px; }
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group .hint { color: var(--color-text-dim); font-size: 12px; margin-top: 4px; }

.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }

/* ============================================================
   按钮
   ============================================================ */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; opacity: 0.9; }
.btn-primary { background: var(--color-primary); color: var(--color-white); }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: var(--color-white); color: var(--color-text); border: 1px solid var(--color-border); }
.btn-secondary:hover { background: var(--color-bg); }
.btn-danger { background: var(--color-danger); color: var(--color-white); }
.btn-success { background: var(--color-success); color: var(--color-white); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { width: 100%; text-align: center; }

/* ============================================================
   表格
   ============================================================ */
.table-wrap { overflow-x: auto; }
table.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
}
table.data-table th,
table.data-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}
table.data-table th {
    background: var(--color-bg);
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
}
table.data-table tr:hover td { background: rgba(26,115,232,0.03); }
table.data-table .col-actions { white-space: nowrap; }
table.data-table .col-actions a { margin-right: 8px; }

/* ============================================================
   标签 / 徽章
   ============================================================ */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}
.badge-success { background: #e6f4ea; color: var(--color-success); }
.badge-danger { background: #fce8e6; color: var(--color-danger); }
.badge-info { background: var(--color-primary-light); color: var(--color-primary); }

/* ============================================================
   提示框
   ============================================================ */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
}
.alert-success { background: #e6f4ea; color: var(--color-success); }
.alert-error { background: #fce8e6; color: var(--color-danger); }
.alert-info { background: var(--color-primary-light); color: var(--color-primary); }

/* ============================================================
   分页
   ============================================================ */
.pagination {
    display: flex;
    gap: 4px;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    flex-wrap: wrap;
}
.pagination a,
.pagination span {
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 13px;
    background: var(--color-white);
    color: var(--color-text);
}
.pagination a:hover { background: var(--color-primary-light); text-decoration: none; }
.pagination .current { background: var(--color-primary); color: var(--color-white); border-color: var(--color-primary); }
.pagination .disabled { color: var(--color-text-dim); cursor: not-allowed; }
.pagination .ellipsis { border: none; background: transparent; }
.pagination .total { border: none; background: transparent; color: var(--color-text-secondary); }

/* ============================================================
   工具类
   ============================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.mt-16 { margin-top: 16px; }
.mb-0 { margin-bottom: 0; }
.mb-16 { margin-bottom: 16px; }
.text-dim { color: var(--color-text-dim); }
.text-secondary { color: var(--color-text-secondary); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.fw-bold { font-weight: 700; }
.text-break { word-break: break-all; }

/* ============================================================
   过滤栏
   ============================================================ */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: center;
    flex-wrap: wrap;
}
.filter-bar select,
.filter-bar input {
    padding: 6px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 13px;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); transition: transform 0.2s; }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .topbar .menu-toggle { display: block; }
}
.menu-toggle { display: none; font-size: 20px; cursor: pointer; background: none; border: none; }