:root {
    --primary-color: #7C3AED;
    --primary-hover: #6D28D9;
    --secondary-color: #EC4899;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
    --light-bg: #F3F4F6;
    --card-bg: #FFFFFF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%) !important;
    box-shadow: var(--shadow);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 0 4px;
    padding: 8px 16px !important;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.container {
    max-width: 1400px;
    padding: 2rem 1rem;
}

.card {
    background: var(--card-bg);
    border: none;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-header {
    background: transparent;
    border: none;
    padding: 1.5rem;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary-color) 100%);
}

.btn-success {
    background: var(--success-color);
    border: none;
    border-radius: 12px;
    padding: 10px 20px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-danger {
    background: var(--danger-color);
    border: none;
    border-radius: 12px;
    padding: 10px 20px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-warning {
    background: var(--warning-color);
    border: none;
    border-radius: 12px;
    padding: 10px 20px;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
}

.btn-sm {
    padding: 6px 16px;
    font-size: 0.875rem;
}

.table {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
}

.table thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
}

.table thead th {
    border: none;
    padding: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background-color: rgba(124, 58, 237, 0.05);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-color: var(--border-color);
}

.form-control, .form-select {
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 16px;
    transition: all 0.3s ease;
    background-color: var(--card-bg);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.badge {
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
}

.badge-pending {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-approved {
    background-color: #D1FAE5;
    color: #065F46;
}

.badge-rejected {
    background-color: #FEE2E2;
    color: #991B1B;
}

.badge-cancelled {
    background-color: #E5E7EB;
    color: #374151;
}

.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    font-weight: 500;
}

.alert-success {
    background-color: #D1FAE5;
    color: #065F46;
}

.alert-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

.stats-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(124, 58, 237, 0.3);
}

.stats-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stats-card p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
}

.stats-card i {
    font-size: 2.5rem;
    opacity: 0.3;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    max-width: 450px;
    width: 100%;
    background: white;
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.login-card h2 {
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.footer {
    background: var(--card-bg);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-secondary);
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.05);
}

.dropdown-menu {
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
}

.dropdown-item {
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background-color: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .stats-card h3 {
        font-size: 2rem;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}