/* ============================================================
   二手电脑销售ERP管理系统 样式表
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --info: #0891b2;
    --info-light: #cffafe;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --sidebar-active: #2563eb;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    font-size: 14px;
    line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== 布局 ===== */
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 220px;
    background: var(--sidebar-bg);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
}
.main {
    flex: 1;
    margin-left: 220px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.logo {
    padding: 20px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.logo-icon { font-size: 24px; }
.logo-text { font-size: 16px; font-weight: 700; letter-spacing: 1px; }

.nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    color: rgba(255,255,255,0.7);
    transition: all 0.2s;
    border-left: 3px solid transparent;
}
.nav-item:hover { background: var(--sidebar-hover); color: #fff; text-decoration: none; }
.nav-item.active {
    background: var(--sidebar-active);
    color: #fff;
    border-left-color: #60a5fa;
}
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.nav-name { font-size: 14px; }

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.user-info { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.user-avatar {
    width: 36px; height: 36px;
    background: var(--primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px;
}
.user-detail { flex: 1; min-width: 0; }
.user-name { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 11px; color: rgba(255,255,255,0.5); }
.logout-btn {
    display: block;
    text-align: center;
    padding: 6px;
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.8);
    border-radius: 6px;
    font-size: 12px;
}
.logout-btn:hover { background: var(--danger); color: #fff; text-decoration: none; }

/* ===== 顶部栏 ===== */
.topbar {
    background: #fff;
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}
.page-title { font-size: 18px; font-weight: 700; color: var(--gray-900); }
.current-time { font-size: 13px; color: var(--gray-500); }

/* ===== 内容区 ===== */
.content { padding: 24px; flex: 1; }

/* ===== 卡片 ===== */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}
.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
.stat-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    border-left: 4px solid var(--primary);
}
.stat-card.success { border-left-color: var(--success); }
.stat-card.warning { border-left-color: var(--warning); }
.stat-card.danger { border-left-color: var(--danger); }
.stat-card.info { border-left-color: var(--info); }
.stat-label { font-size: 13px; color: var(--gray-500); margin-bottom: 8px; }
.stat-value { font-size: 24px; font-weight: 700; color: var(--gray-900); }
.stat-sub { font-size: 12px; color: var(--gray-400); margin-top: 4px; }

/* ===== 表格 ===== */
.table-wrap { overflow-x: auto; }
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
table.data-table th {
    background: var(--gray-50);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}
table.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
}
table.data-table tr:hover td { background: var(--gray-50); }
table.data-table .text-right { text-align: right; }
table.data-table .text-center { text-align: center; }
.profit-positive { color: var(--success); font-weight: 600; }
.profit-negative { color: var(--danger); font-weight: 600; }

/* ===== 标签 ===== */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}
.tag-blue { background: var(--primary-light); color: var(--primary-dark); }
.tag-green { background: var(--success-light); color: var(--success); }
.tag-orange { background: var(--warning-light); color: var(--warning); }
.tag-red { background: var(--danger-light); color: var(--danger); }
.tag-gray { background: var(--gray-100); color: var(--gray-600); }
.tag-cyan { background: var(--info-light); color: var(--info); }

/* ===== 表单 ===== */
.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
}
.form-group { flex: 1; min-width: 180px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.form-group label .required { color: var(--danger); }
input[type="text"], input[type="password"], input[type="number"],
input[type="date"], input[type="tel"], input[type="email"],
select, textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 13px;
    color: var(--gray-800);
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
input[readonly], input:disabled { background: var(--gray-50); color: var(--gray-500); }
textarea { resize: vertical; min-height: 60px; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.4;
}
.btn:hover { text-decoration: none; opacity: 0.9; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-info { background: var(--info); color: #fff; }
.btn-gray { background: var(--gray-200); color: var(--gray-700); }
.btn-gray:hover { background: var(--gray-300); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 10px 24px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

/* ===== 分类筛选标签 ===== */
.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}
.cat-filter {
    padding: 6px 14px;
    background: #fff;
    border: 1px solid var(--gray-300);
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--gray-600);
}
.cat-filter:hover { border-color: var(--primary); color: var(--primary); }
.cat-filter.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ===== 入库动态行 ===== */
.inbound-table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
.inbound-table th {
    background: var(--gray-50);
    padding: 8px 10px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-200);
}
.inbound-table td { padding: 6px; border-bottom: 1px solid var(--gray-100); }
.inbound-table input, .inbound-table select { padding: 6px 8px; font-size: 12px; }
.row-remove {
    color: var(--danger);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 16px;
    background: none;
    border: none;
}
.row-remove:hover { background: var(--danger-light); border-radius: 4px; }

/* ===== 提示框 ===== */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 13px;
}
.alert-success { background: var(--success-light); color: var(--success); border: 1px solid #86efac; }
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid #fca5a5; }
.alert-warning { background: var(--warning-light); color: var(--warning); border: 1px solid #fcd34d; }
.alert-info { background: var(--info-light); color: var(--info); border: 1px solid #67e8f9; }

/* ===== 登录页 ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
}
.login-box {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    padding: 40px;
    width: 380px;
    max-width: 90%;
}
.login-logo {
    text-align: center;
    margin-bottom: 24px;
}
.login-logo .icon { font-size: 48px; }
.login-logo h1 { font-size: 20px; color: var(--gray-900); margin-top: 8px; }
.login-logo p { font-size: 13px; color: var(--gray-500); margin-top: 4px; }
.login-box .form-group { margin-bottom: 16px; }
.login-box .btn { margin-top: 8px; }

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 20px;
}
.pagination a, .pagination span {
    padding: 6px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    font-size: 13px;
    color: var(--gray-600);
    background: #fff;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== 详情面板 ===== */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}
.detail-item {
    padding: 10px 14px;
    background: var(--gray-50);
    border-radius: 6px;
}
.detail-item .label { font-size: 12px; color: var(--gray-500); }
.detail-item .value { font-size: 14px; font-weight: 600; color: var(--gray-800); margin-top: 2px; }

/* ===== 工具条 ===== */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
    align-items: center;
}
.toolbar .form-group { flex: 0 0 auto; min-width: 150px; margin-bottom: 0; }
.toolbar .spacer { flex: 1; }

/* ===== 模态框 ===== */
.modal-mask {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}
.modal-mask.show { display: flex; }
.modal-box {
    background: #fff;
    border-radius: 10px;
    padding: 24px;
    width: 500px;
    max-width: 90%;
    max-height: 85vh;
    overflow-y: auto;
}
.modal-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ===== 图表容器 ===== */
.chart-container {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}
.chart-container h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--gray-900);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar .logo-text, .sidebar .nav-name, .sidebar .user-detail { display: none; }
    .main { margin-left: 60px; }
    .content { padding: 12px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}