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

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}


.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 1.2rem 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.header h1 .subtitle {
    font-size: 0.75rem;
    opacity: 0.9;
    font-weight: 400;
    display: block;
    margin-top: 0.2rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-name {
    font-size: 0.95rem;
    opacity: 0.95;
}

.user-role {
    background: rgba(255,255,255,0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
}

.header a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.header a:hover {
    opacity: 0.8;
}


.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}


.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.card h2 {
    color: #1e3c72;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    border-bottom: 3px solid #2a5298;
    padding-bottom: 0.8rem;
}

.card h3 {
    color: #2a5298;
    font-size: 1.3rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}
.nav {
    background: white;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.nav a {
    display: inline-block;
    padding: 0.7rem 1.3rem;
    margin-right: 0.7rem;
    margin-bottom: 0.5rem;
    background: #f0f4f8;
    border-radius: 8px;
    text-decoration: none;
    color: #1e3c72;
    font-weight: 500;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.nav a:hover {
    background: #1e3c72;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(30,60,114,0.3);
}

.nav a.active {
    background: #2a5298;
    color: white;
    border-color: #1e3c72;
}
.form-group {
    margin-bottom: 1.3rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #e0e6ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2a5298;
    box-shadow: 0 0 0 3px rgba(42,82,152,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}


.btn {
    padding: 0.8rem 1.8rem;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(30,60,114,0.4);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-success {
    background: linear-gradient(135deg, #27ae60 0%, #229954 100%);
}

.btn-danger {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
}

.btn-warning {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
}


table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
}

table th,
table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e8ecf1;
}

table th {
    background: #f8fafb;
    font-weight: 600;
    color: #1e3c72;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

table tr:hover {
    background: #f8fafb;
}

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


.badge {
    display: inline-block;
    padding: 0.35rem 0.7rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}


.alert {
    padding: 1.2rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: #28a745;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-color: #dc3545;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffc107;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: #17a2b8;
}

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


.stat-card {
    padding: 2rem;
    color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

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

.stat-card p {
    font-size: 1rem;
    opacity: 0.95;
}


.login-box {
    max-width: 450px;
    margin: 5rem auto;
}

.login-box .card {
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: #1e3c72;
    border: none;
}


@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 1.2rem;
    }
    
    .user-info {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 0.85rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .nav a {
        display: block;
        margin-right: 0;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    table th,
    table td {
        padding: 0.7rem;
    }
}


.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }

.notification-item {
    transition: all 0.3s;
}

.notification-item:hover {
    transform: translateX(5px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.notification-item.unread {
    font-weight: 500;
}

.notification-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
}