/* Base Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f5f7fa;
    color: var(--dark-color);
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid #ddd;
}

h1, h2, h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
}

.auth-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn {
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--secondary-color);
}

/* Search Section */
.search-section {
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-box input, .search-box select {
    flex: 1;
    min-width: 200px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
}

.search-box button {
    padding: 10px 20px;
}

/* Results Section */
.results-section {
    margin-top: 20px;
}

.loading {
    text-align: center;
    padding: 20px;
    display: none;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.university-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.university-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.university-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.university-card p {
    color: #666;
    margin-bottom: 12px;
}

.website-link {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    margin-right: 10px;
    font-size: 14px;
    transition: var(--transition);
}

.website-link:hover {
    background-color: var(--secondary-color);
}

.add-btn, .remove-btn {
    padding: 6px 12px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.add-btn {
    background-color: var(--success-color);
    color: white;
}

.add-btn:hover {
    background-color: #27ae60;
}

.remove-btn {
    background-color: var(--accent-color);
    color: white;
}

.remove-btn:hover {
    background-color: #c0392b;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 20px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 400px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    position: relative;
}

.close {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
}

.close:hover {
    color: var(--dark-color);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
}

.message {
    margin-top: 15px;
    padding: 10px;
    border-radius: var(--border-radius);
    display: none;
}

/* Empty List */
.empty-list {
    text-align: center;
    padding: 40px 20px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.empty-list p {
    margin-bottom: 20px;
    color: #666;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .auth-buttons {
        width: 100%;
        justify-content: flex-end;
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .search-box input, .search-box select, .search-box button {
        width: 100%;
    }
    
    .modal-content {
        margin: 20% auto;
        width: 95%;
    }
}