:root {
    --primary-color: <?= PRIMARY_COLOR ?>;
    --accent-color: <?= ACCENT_COLOR ?>;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f9fafb;
    color: #111827;
    line-height: 1.6;
}

.navbar {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.nav-brand {
    flex-shrink: 0;
}

.nav-brand a {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    padding: 1rem 0;
    transition: opacity 0.2s;
}

.nav-brand a:hover {
    opacity: 0.9;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    flex: 1;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
    position: relative;
    white-space: nowrap;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-links a:active {
    background: rgba(255, 255, 255, 0.15);
}

.nav-user {
    font-weight: 600;
    color: white;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    font-size: 0.9rem;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-user::before {
    content: "👤";
    font-size: 1.1rem;
}

@media (max-width: 1024px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 2rem;
    }
    
    .nav-links {
        justify-content: center;
        gap: 0.5rem;
    }
    
    .nav-links a {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .nav-user {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0.25rem;
    }
    
    .nav-links a {
        text-align: center;
        width: 100%;
    }
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    min-height: calc(100vh - 200px);
}

.card {
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #111827;
}

.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.375rem;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-secondary {
    background: #6b7280;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    background: #f9fafb;
    font-weight: 600;
    color: #374151;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.form-control {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.1);
}

.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: #6b7280;
    font-size: 0.875rem;
}

.footer {
    background: white;
    padding: 2rem 0;
    text-align: center;
    color: #6b7280;
    margin-top: 4rem;
}