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

:root {
    --primary: #1677ff;
    --primary-dark: #0958d9;
    --primary-light: #e6f4ff;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --text: #1e293b;
    --text-secondary: #64748b;
    --bg: #f0f5ff;
    --card-bg: #ffffff;
    --shadow: 0 2px 12px rgba(22, 119, 255, 0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --sidebar-width: 240px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* 登录页面 */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: linear-gradient(135deg, #1677ff 0%, #0958d9 50%, #69b1ff 100%);
    position: relative;
}

.login-page::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.login-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 40px 36px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    max-width: 420px;
    width: 100%;
    position: relative;
    z-index: 1;
}

.login-logo {
    text-align: center;
    margin-bottom: 28px;
}

.login-logo i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 12px;
}

.login-logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.login-logo p {
    font-size: 14px;
    color: var(--text-secondary);
}

.login-form .form-group {
    margin-bottom: 18px;
}

.login-form label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 6px;
}

.login-form label i {
    color: var(--primary);
    width: 18px;
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 15px;
    outline: none;
    transition: all 0.3s ease;
    background: #f8fafc;
}

.login-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 119, 255, 0.1);
    background: #fff;
}

.btn-block {
    width: 100%;
    justify-content: center;
    margin-top: 8px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(22, 119, 255, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 6px 20px rgba(22, 119, 255, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: #f1f5f9;
    color: var(--text);
}

.btn-secondary:hover {
    background: #e2e8f0;
}

.login-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #f1f5f9;
    font-size: 12px;
    color: var(--text-secondary);
}

.login-footer a {
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 500;
}

.login-footer a:hover {
    text-decoration: underline;
}

.message {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
}

.message button {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    margin-left: auto;
    font-size: 16px;
    opacity: 0.7;
}

.message button:hover {
    opacity: 1;
}

.message-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.message-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* 管理后台布局 */
.admin-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--text);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header i {
    font-size: 28px;
    color: var(--primary);
}

.sidebar-nav {
    padding: 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar-nav a i {
    width: 20px;
    text-align: center;
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 24px 32px;
    max-width: 1200px;
}

.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}

.admin-header h1 {
    font-size: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-header h1 i {
    color: var(--primary);
}

.admin-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--primary-light);
    border-radius: 50px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
}

/* 管理区域 */
.admin-section {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.admin-section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.admin-section h2 i {
    color: var(--primary);
}

/* 表单 */
.admin-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group input,
.form-group select {
    padding: 10px 14px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
    background: #f8fafc;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(22, 119, 255, 0.1);
    background: #fff;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

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

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.admin-table th {
    background: #f8fafc;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid #e2e8f0;
}

.admin-table td {
    padding: 12px 16px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.admin-table tr:hover td {
    background: #f8fafc;
}

.type-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.type-income {
    background: #ecfdf5;
    color: #065f46;
}

.type-expense {
    background: #fef2f2;
    color: #991b1b;
}

.amount-income {
    color: var(--success);
    font-weight: 700;
}

.amount-expense {
    color: var(--danger);
    font-weight: 700;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-completed {
    background: #ecfdf5;
    color: #065f46;
}

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

.note-cell {
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.action-cell {
    display: flex;
    gap: 6px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-edit:hover {
    background: var(--primary);
    color: #fff;
}

.btn-delete {
    background: #fef2f2;
    color: var(--danger);
}

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

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar-header span,
    .sidebar-nav a span {
        display: none;
    }

    .sidebar-header {
        justify-content: center;
        padding: 16px;
    }

    .sidebar-nav {
        padding: 8px;
    }

    .sidebar-nav a {
        justify-content: center;
        padding: 12px;
    }

    .main-content {
        margin-left: 60px;
        padding: 16px;
    }

    .admin-form .form-row {
        grid-template-columns: 1fr;
    }

    .admin-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .admin-table {
        font-size: 12px;
    }

    .admin-table th,
    .admin-table td {
        padding: 8px 10px;
    }

    .action-cell {
        flex-direction: column;
        gap: 4px;
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 24px 20px;
    }

    .main-content {
        padding: 12px;
    }

    .admin-section {
        padding: 16px;
    }

    .admin-table {
        font-size: 11px;
    }

    .admin-table th,
    .admin-table td {
        padding: 6px 8px;
    }
}