/* === 全局 === */
:root {
    --primary: #3f5bd8;
    --primary-light: #eef2ff;
    --primary-dark: #2f47b3;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --muted: #94a3b8;
    --body-bg: #f6f8fc;
    --card-bg: #ffffff;
    --nav-bg: #1f2a3d;
    --nav-hover: #2f3d55;
    --text: #334155;
    --text-light: #64748b;
    --border: #e2e8f0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--body-bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

main { flex: 1; }
main.container-fluid {
    max-width: 1440px;
}

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

/* === 导航栏 === */
.navbar {
    background: linear-gradient(90deg, #1f2a3d 0%, #25334a 100%) !important;
    box-shadow: 0 2px 10px rgba(15, 23, 42, .16);
    padding: .6rem 1rem;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: .02em;
    color: #fff !important;
}

.navbar-brand i { opacity: .85; }

.navbar-nav .nav-link {
    color: rgba(255,255,255,.72) !important;
    font-size: .875rem;
    padding: .5rem .75rem;
    border-radius: .375rem;
    transition: all .15s;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: #fff !important;
    background-color: var(--nav-hover);
}

.navbar .dropdown-menu {
    border: 1px solid var(--border);
    box-shadow: 0 4px 16px rgba(0,0,0,.08);
    border-radius: .5rem;
    padding: .375rem;
    font-size: .875rem;
}

.navbar .dropdown-item {
    border-radius: .375rem;
    padding: .425rem .75rem;
}

.navbar .dropdown-item:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

/* === 卡片 === */
.card {
    border: 1px solid var(--border);
    border-radius: .625rem;
    box-shadow: 0 3px 16px rgba(15, 23, 42, .05);
    overflow: hidden;
}

.card-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: .9rem;
    padding: .75rem 1.25rem;
}

.card-body { padding: 1.25rem; }
.row > [class^="col-"] > .card,
.row > [class*=" col-"] > .card {
    height: 100%;
}

/* === 表格 === */
.table {
    font-size: .875rem;
    margin-bottom: 0;
}

.table th {
    white-space: nowrap;
    font-weight: 600;
    color: var(--text-light);
    font-size: .8125rem;
    text-transform: uppercase;
    letter-spacing: .03em;
    border-bottom-width: 2px;
    border-color: var(--border);
    padding: .625rem .75rem;
}

.table td {
    padding: .625rem .75rem;
    vertical-align: middle;
    border-color: var(--border);
}

.table-hover tbody tr:hover {
    background-color: var(--primary-light);
}

/* === 状态标签 === */
.badge {
    font-weight: 500;
    padding: .3em .65em;
    font-size: .75rem;
    border-radius: .375rem;
}

.badge-pending {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-approved {
    background-color: #dcfce7;
    color: #166534;
}

.badge-rejected {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-cancelled {
    background-color: #f1f5f9;
    color: #475569;
}

/* === 按钮 === */
.btn {
    font-size: .875rem;
    font-weight: 500;
    border-radius: .5rem;
    padding: .425rem 1rem;
    transition: all .15s ease;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

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

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

.btn-secondary {
    background-color: #e2e8f0;
    border-color: #e2e8f0;
    color: var(--text);
}

.btn-secondary:hover {
    background-color: #cbd5e1;
    border-color: #cbd5e1;
    color: var(--text);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-sm {
    padding: .25rem .5rem;
    font-size: .8125rem;
    border-radius: .375rem;
}

/* === 表单 === */
.form-control, .form-select {
    border-radius: .5rem;
    border-color: var(--border);
    font-size: .875rem;
    padding: .5rem .75rem;
    transition: border-color .15s, box-shadow .15s;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, .12);
}

.form-label {
    font-weight: 500;
    font-size: .8125rem;
    color: var(--text-light);
    margin-bottom: .375rem;
}

.required::after {
    content: " *";
    color: var(--danger);
}

/* === 搜索栏 === */
.search-form {
    background-color: var(--card-bg);
    padding: 1rem 1.25rem;
    border-radius: .625rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    box-shadow: 0 2px 10px rgba(15, 23, 42, .03);
}

/* === 统计卡片（旧版兼容） === */
.stat-card {
    text-align: center;
    padding: 1.5rem 1rem;
}

.stat-card .stat-icon {
    width: 44px; height: 44px;
    border-radius: .75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: .75rem;
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}

.stat-card .stat-label {
    color: var(--text-light);
    font-size: .8125rem;
    margin-top: .375rem;
}

/* === 统计卡片 V2 === */
.row > [class^="col-"] > .stat-card-v2,
.row > [class*=" col-"] > .stat-card-v2 {
    height: 100%;
}

/* === 分页 === */
.pagination { margin-bottom: 0; }

.page-link {
    border-radius: .375rem;
    margin: 0 2px;
    font-size: .875rem;
    color: var(--text);
    border-color: var(--border);
}

.page-item.active .page-link {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* === 操作按钮 === */
.action-buttons .btn { margin-right: .25rem; }

/* === 登录 === */
.login-container {
    max-width: 400px;
    margin: 100px auto;
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo i {
    font-size: 3.5rem;
    color: var(--primary);
    background: var(--primary-light);
    width: 80px; height: 80px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.login-logo h4 {
    font-weight: 700;
    color: var(--text);
}

/* === 欠款高亮 === */
.table-danger-light {
    background-color: #fff4f4 !important;
}

.table-danger-light:hover {
    background-color: #fee2e2 !important;
}

/* === 空状态 === */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--muted);
}

.empty-state i {
    font-size: 2.5rem;
    margin-bottom: .75rem;
    opacity: .5;
}

/* === 卡片悬停增强 === */
.card {
    transition: box-shadow .3s ease;
}

/* === 徽章微调 === */
.badge-pending,
.badge-approved,
.badge-rejected,
.badge-cancelled {
    letter-spacing: .02em;
}

/* === 侧边信息 === */
.info-sidebar {
    background-color: var(--body-bg);
    padding: 1rem;
    border-radius: .5rem;
}

.info-sidebar dt {
    color: var(--text-light);
    font-weight: 500;
    font-size: .8125rem;
    margin-bottom: .25rem;
}

.info-sidebar dd {
    margin-bottom: 1rem;
    font-weight: 500;
}

/* === 页面标题区 === */
h4 {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

h6.text-muted {
    color: var(--text-light) !important;
    font-weight: 600;
    font-size: .875rem;
}

/* === 详情页 === */
.card-body strong {
    display: inline-block;
    font-size: .8125rem;
    color: var(--text-light);
    font-weight: 500;
}

/* === 提醒条 === */
.alert {
    border-radius: .5rem;
    font-size: .875rem;
    border: none;
}

.alert-success { background-color: #dcfce7; color: #166534; }
.alert-danger  { background-color: #fee2e2; color: #991b1b; }
.alert-warning { background-color: #fef3c7; color: #92400e; }
.alert-info    { background-color: #dbeafe; color: #1e40af; }

/* === 页脚 === */
.footer {
    background-color: var(--card-bg) !important;
    border-top: 1px solid var(--border);
}

.footer span {
    font-size: .8125rem;
    color: var(--muted);
}

/* === 表格响应式 === */
.table-responsive { margin-bottom: 1rem; }

/* === 滚动条美化 (webkit) === */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }