/* === Базовые стили === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #e3f2fd; /* Светло-голубой фон */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
}

.navbar {
    background-color: white;
    padding: 20px 40px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5em;
    font-weight: bold;
    color: #0056b3;
    text-decoration: none;
}

.navbar-menu {
    display: flex;
    gap: 30px;
}

.navbar-menu a {
    color: #555;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.navbar-menu a:hover {
    color: #0056b3;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.card {
    background-color: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.card h1, .card h2 {
    color: #0056b3;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    background-color: #0056b3;
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #003d82;
}

.btn-secondary {
    background-color: #64b5f6;
}

.btn-secondary:hover {
    background-color: #42a5f5;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #64b5f6;
}

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

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

th {
    background-color: #64b5f6;
    color: white;
    font-weight: 600;
}

tr:hover {
    background-color: #f5f5f5;
}

.page-header {
    margin-bottom: 30px;
}

.page-header h1 {
    color: #0056b3;
    font-size: 2em;
    margin-bottom: 10px;
}

.page-header p {
    color: #666;
    font-size: 1.1em;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 20px;
    }
    
    .navbar-menu {
        flex-direction: column;
        gap: 15px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
}

/* === Уведомления === */
.alert {
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}