:root {
    --sidebar-width: 260px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #3b82f6;
    --sidebar-hover: #334155;
    --header-height: 56px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f1f5f9;
    overflow-x: hidden;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    z-index: 1040;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    padding: 1rem 1.25rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid #334155;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-nav {
    padding: 0.5rem 0;
}

.sidebar-nav .nav-section {
    padding: 0.75rem 1.25rem 0.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.25rem;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}

.sidebar-nav .nav-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
}

.sidebar-nav .nav-link.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--sidebar-active);
    border-left-color: var(--sidebar-active);
}

.sidebar-nav .nav-link .bi {
    font-size: 1rem;
    width: 1.25rem;
    text-align: center;
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.main-header {
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 1030;
}

.main-body {
    padding: 1.5rem;
}

/* Page header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: #1e293b;
}

/* Cards */
.stat-card {
    background: #fff;
    border-radius: 0.75rem;
    padding: 1.25rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    border: 1px solid #e2e8f0;
    transition: box-shadow 0.15s;
}

.stat-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e293b;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: #64748b;
    margin-top: 0.25rem;
}

/* Status badges */
.badge-status-new { background: #dbeafe; color: #1d4ed8; }
.badge-status-open { background: #fef3c7; color: #b45309; }
.badge-status-in_progress { background: #e0e7ff; color: #4338ca; }
.badge-status-resolved { background: #d1fae5; color: #065f46; }
.badge-status-closed { background: #f1f5f9; color: #475569; }
.badge-status-cancelled { background: #fee2e2; color: #991b1b; }
.badge-status-appealed { background: #d1fae5; color: #065f46; }
.badge-status-not_appealed { background: #fee2e2; color: #991b1b; }

/* Tables */
.table-container {
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    border: 1px solid #e2e8f0;
    overflow: hidden;
}

.table-container .table {
    margin-bottom: 0;
}

.table-container .table th {
    background: #f8fafc;
    border-bottom: 2px solid #e2e8f0;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    padding: 0.75rem 1rem;
    white-space: nowrap;
}

.table-container .table td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    font-size: 0.875rem;
    color: #334155;
}

.table-container .table tbody tr:hover {
    background: #f8fafc;
}

/* Filters bar */
.filters-bar {
    background: #fff;
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    border: 1px solid #e2e8f0;
}

/* Form styles */
.form-card {
    background: #fff;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    border: 1px solid #e2e8f0;
}

/* Login page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.login-card {
    background: #fff;
    border-radius: 1rem;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
}

.login-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
    text-align: center;
    margin-bottom: 0.5rem;
}

.login-card .subtitle {
    text-align: center;
    color: #64748b;
    font-size: 0.875rem;
    margin-bottom: 2rem;
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: #334155;
    cursor: pointer;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1035;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .sidebar-overlay.show {
        display: block;
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar-toggle {
        display: inline-block;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

/* Pagination */
.pagination-wrapper {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.875rem;
    color: #64748b;
    border-top: 1px solid #e2e8f0;
}