/* ============================================================
   上海珠声文化传媒有限公司 合同管理系统 样式表
   专业商务风格 - 海军蓝 / 深灰 / 白色
   ============================================================ */

:root {
    --color-primary: #1a365d;
    --color-primary-dark: #0f2540;
    --color-primary-light: #2c5282;
    --color-secondary: #4a5568;
    --color-accent: #3182ce;
    --color-accent-light: #4299e1;
    --color-success: #2f855a;
    --color-warning: #b7791f;
    --color-danger: #c53030;
    --color-info: #2c7a7b;

    --color-bg: #f0f2f5;
    --color-surface: #ffffff;
    --color-surface-alt: #f7fafc;
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    --color-text: #1a202c;
    --color-text-light: #718096;
    --color-text-muted: #a0aec0;

    --sidebar-width: 250px;
    --header-height: 64px;
    --radius: 8px;
    --radius-sm: 5px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.10), 0 4px 8px rgba(0, 0, 0, 0.04);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
    height: 100%;
}

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

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================================
   登录页
   ============================================================ */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f2540 0%, #1a365d 40%, #2c5282 100%);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(49, 130, 206, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.login-wrapper::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(47, 133, 90, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.login-card {
    background: var(--color-surface);
    width: 100%;
    max-width: 420px;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
    overflow: hidden;
    position: relative;
    z-index: 1;
    animation: loginFadeIn 0.5s ease;
}

@keyframes loginFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    padding: 36px 40px 32px;
    text-align: center;
}

.login-header h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.login-header p {
    font-size: 13px;
    opacity: 0.8;
    letter-spacing: 0.5px;
}

.login-body {
    padding: 32px 40px 36px;
}

.login-body .form-group {
    margin-bottom: 22px;
}

.login-body .form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-secondary);
    font-size: 13px;
}

.login-body .form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: var(--transition);
    background: var(--color-surface-alt);
}

.login-body .form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface);
    box-shadow: 0 0 0 4px rgba(49, 130, 206, 0.1);
}

.login-body .btn-login {
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 4px;
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.3);
}

.login-body .btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(26, 54, 93, 0.4);
}

.login-body .btn-login:active {
    transform: translateY(0);
}

.login-footer-note {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ============================================================
   布局
   ============================================================ */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--color-primary-dark) 0%, #0a1b30 100%);
    color: #cbd5e0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 0 22px;
    height: var(--header-height);
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.25);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-brand .brand-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 15px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(49, 130, 206, 0.3);
}

.sidebar-nav {
    padding: 12px 0;
}

.nav-section-title {
    padding: 18px 22px 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: #5a6a7e;
    font-weight: 600;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 10px 22px;
    color: #a0b0c5;
    font-size: 14px;
    border-left: 3px solid transparent;
    transition: var(--transition-fast);
    position: relative;
}

.sidebar-nav a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.sidebar-nav a.active {
    background: linear-gradient(90deg, rgba(49, 130, 206, 0.2) 0%, rgba(49, 130, 206, 0.05) 100%);
    border-left-color: var(--color-accent);
    color: #fff;
}

.sidebar-nav a.active::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--color-accent);
    border-radius: 3px 0 0 3px;
}

.sidebar-nav .nav-icon {
    width: 22px;
    margin-right: 12px;
    text-align: center;
    font-size: 15px;
}

/* 主内容区 */
.main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

.topbar .page-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.3px;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 14px;
}

.topbar-user .user-info {
    text-align: right;
    line-height: 1.3;
}

.topbar-user .user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.topbar-user .user-role {
    font-size: 11px;
    color: var(--color-text-light);
}

.topbar-user .user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 2px 6px rgba(26, 54, 93, 0.2);
}

.content {
    padding: 28px;
    flex: 1;
}

/* ============================================================
   卡片与面板
   ============================================================ */
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border-light);
    margin-bottom: 24px;
    transition: var(--transition-fast);
}

.card-header {
    padding: 16px 22px;
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-body {
    padding: 22px;
}

.card-actions {
    display: flex;
    gap: 8px;
}

/* ============================================================
   统计卡片
   ============================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border-light);
    padding: 22px;
    display: flex;
    align-items: center;
    gap: 18px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-accent);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.stat-icon.primary { background: #ebf4ff; color: var(--color-accent); }
.stat-icon.success { background: #e6fffa; color: var(--color-success); }
.stat-icon.warning { background: #fffaf0; color: var(--color-warning); }
.stat-icon.danger { background: #fff5f5; color: var(--color-danger); }
.stat-icon.info { background: #e6fffa; color: var(--color-info); }

.stat-info .stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.stat-info .stat-label {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 3px;
    font-weight: 500;
}

/* ============================================================
   表格
   ============================================================ */
.table-wrapper {
    overflow-x: auto;
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

table.data-table thead th {
    background: var(--color-surface-alt);
    color: var(--color-secondary);
    font-weight: 700;
    text-align: left;
    padding: 13px 16px;
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table.data-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
    vertical-align: middle;
    transition: var(--transition-fast);
}

table.data-table tbody tr:nth-child(even) {
    background: var(--color-surface-alt);
}

table.data-table tbody tr:hover {
    background: #e6f0fa;
}

table.data-table tbody tr:last-child td {
    border-bottom: none;
}

.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-nowrap { white-space: nowrap; }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.fw-600 { font-weight: 600; }

.amount {
    font-family: "SF Mono", "Consolas", "Courier New", monospace;
    font-weight: 600;
    color: var(--color-primary);
}

/* ============================================================
   状态标签
   ============================================================ */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
    white-space: nowrap;
    letter-spacing: 0.3px;
}

.badge-draft { background: #edf2f7; color: #4a5568; }
.badge-pending { background: #fefcbf; color: #975a16; }
.badge-active { background: #c6f6d5; color: #276749; }
.badge-completed { background: #bee3f8; color: #2c5282; }
.badge-terminated { background: #fed7d7; color: #9b2c2c; }
.badge-archived { background: #e2e8f0; color: #4a5568; }

.badge-role-admin { background: #fed7d7; color: #9b2c2c; }
.badge-role-manager { background: #bee3f8; color: #2c5282; }
.badge-role-staff { background: #edf2f7; color: #4a5568; }
.badge-role-client { background: #fefcbf; color: #975a16; }

/* ============================================================
   按钮
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    box-shadow: 0 2px 4px rgba(26, 54, 93, 0.15);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(26, 54, 93, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: var(--color-surface-alt);
    color: var(--color-text);
    border-color: #cbd5e0;
}

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

.btn-success:hover {
    background: #276749;
    color: #fff;
}

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

.btn-danger:hover {
    background: #9b2c2c;
    color: #fff;
}

.btn-warning {
    background: var(--color-warning);
    color: #fff;
}

.btn-warning:hover {
    background: #975a16;
    color: #fff;
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-accent);
    padding: 4px 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    border-radius: var(--radius-sm);
}

.btn-link:hover {
    color: var(--color-primary-dark);
    background: var(--color-surface-alt);
}

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

.btn-link.danger:hover {
    background: #fff5f5;
    color: #9b2c2c;
}

/* ============================================================
   表单
   ============================================================ */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 24px;
}

.form-grid .full {
    grid-column: 1 / -1;
}

.form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-secondary);
}

.form-group label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-surface);
    transition: var(--transition-fast);
    font-family: inherit;
}

.form-control:hover {
    border-color: #cbd5e0;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.form-control:disabled {
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

textarea.form-control {
    min-height: 90px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    padding-right: 36px;
}

input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent);
    cursor: pointer;
    vertical-align: middle;
}

.checkbox-inline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--color-text);
}

.form-actions {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 5px;
}

/* ============================================================
   搜索筛选栏
   ============================================================ */
.filter-bar {
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 18px 22px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: flex-end;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filter-item label {
    font-size: 12px;
    color: var(--color-text-light);
    font-weight: 600;
}

.filter-item .form-control {
    min-width: 160px;
    padding: 8px 12px;
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 12px;
    padding: 0 22px 16px;
}

.pagination-info {
    font-size: 13px;
    color: var(--color-text-light);
}

.pagination-links {
    display: flex;
    gap: 4px;
}

.pagination-links a,
.pagination-links span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    padding: 0 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-secondary);
    background: var(--color-surface);
    transition: var(--transition-fast);
}

.pagination-links a:hover {
    background: var(--color-surface-alt);
    color: var(--color-primary);
    border-color: var(--color-accent);
}

.pagination-links .active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.pagination-links .disabled {
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.5;
}

/* ============================================================
   提示消息
   ============================================================ */
.alert {
    padding: 13px 18px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-left: 4px solid;
    font-weight: 500;
    animation: alertSlideIn 0.3s ease;
}

@keyframes alertSlideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert-success {
    background: #f0fff4;
    color: #276749;
    border-left-color: var(--color-success);
}

.alert-danger {
    background: #fff5f5;
    color: #9b2c2c;
    border-left-color: var(--color-danger);
}

.alert-warning {
    background: #fffaf0;
    color: #975a16;
    border-left-color: var(--color-warning);
}

.alert-info {
    background: #ebf8ff;
    color: #2c5282;
    border-left-color: var(--color-accent);
}

/* ============================================================
   详情页
   ============================================================ */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 32px;
}

.detail-grid .full {
    grid-column: 1 / -1;
}

.detail-item {
    padding-bottom: 14px;
    border-bottom: 1px dashed var(--color-border);
}

.detail-item .detail-label {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 4px;
    font-weight: 500;
}

.detail-item .detail-value {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 600;
    word-break: break-all;
}

.section-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary);
    margin: 24px 0 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}

/* ============================================================
   附件列表
   ============================================================ */
.attachment-list {
    list-style: none;
}

.attachment-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    margin-bottom: 8px;
    transition: var(--transition-fast);
}

.attachment-list li:hover {
    background: #e6f0fa;
    border-color: var(--color-accent);
}

.attachment-list .file-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.attachment-list .file-icon {
    font-size: 20px;
}

.attachment-list .file-meta {
    font-size: 12px;
    color: var(--color-text-light);
}

/* ============================================================
   工具类
   ============================================================ */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.w-100 { width: 100%; }
.text-small { font-size: 12px; }

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--color-text-muted);
}

.empty-state .empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.35;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }

    .sidebar.show {
        margin-left: 0;
    }

    .sidebar.show ~ .sidebar-overlay,
    .sidebar-overlay.show {
        display: block;
        opacity: 1;
    }

    .main {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: inline-flex;
    }

    .form-grid,
    .detail-grid {
        grid-template-columns: 1fr;
    }

    .content {
        padding: 18px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        padding: 0 16px;
    }

    .topbar-user .user-info {
        display: none;
    }
}