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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

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

/* Header */
.main-header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-header h1 {
    font-size: 1.5rem;
}

.main-header h1 a {
    color: white;
    text-decoration: none;
}

.user-info {
    margin-right: 1rem;
    color: white;
}

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

/* Кнопка выхода в header */
.main-header .btn-small {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    text-decoration: none;
}

.main-header .btn-small:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: #666;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-link {
    background: transparent;
    color: #3498db;
    border: 1px solid #3498db;
}

.btn-link:hover {
    background: #3498db;
    color: white;
}

/* Login */
.login-page {
    min-height: 100vh;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
}

.login-container {
    background: white;
    padding: 2.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border: 1px solid #dee2e6;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: #6c757d;
    font-size: 0.95rem;
    margin: 0;
}

.login-form {
    margin-top: 0;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #495057;
    font-size: 0.9rem;
}

.login-form .form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form .form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-block {
    width: 100%;
    margin-top: 0.5rem;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    border: 1px solid #f5c6cb;
    font-size: 0.9rem;
}

@media (max-width: 480px) {
    .login-container {
        padding: 2rem 1.5rem;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
}

/* Dashboard */
.dashboard-menu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.dashboard-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s, box-shadow 0.3s;
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.dashboard-card h2 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

/* Quick Entry Table */
.quick-entry-table-container {
    overflow-x: auto;
    margin: 2rem 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.quick-entry-table {
    width: 100%;
    border-collapse: collapse;
}

.quick-entry-table th {
    background: #34495e;
    color: white;
    padding: 1rem;
    text-align: left;
    position: sticky;
    top: 0;
}

.quick-entry-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
}

.quick-entry-table tr:hover {
    background: #f8f9fa;
}

.class-name {
    font-weight: 600;
    background: #ecf0f1;
}

.violators-input {
    width: 80px;
    padding: 0.5rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    text-align: center;
    font-size: 1rem;
}

.violators-input:focus {
    border-color: #3498db;
    outline: none;
}

.violators-input.has-value {
    background: #e8f5e9;
    border-color: #4caf50;
}

/* Подсказка для быстрого ввода */
.quick-entry-hint {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background: #f8f9fa;
    border-left: 4px solid #3498db;
    border-radius: 4px;
}

.hint-content {
    color: #495057;
    font-size: 0.95rem;
    line-height: 1.8;
}

.hint-content strong {
    color: #212529;
    display: block;
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.hint-content ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.hint-content li {
    margin-bottom: 0.5rem;
}

.hint-content kbd {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    font-size: 0.85rem;
    line-height: 1;
    color: #212529;
    background: #e9ecef;
    border: 1px solid #adb5bd;
    border-radius: 3px;
    box-shadow: 0 1px 0 rgba(0,0,0,0.2), inset 0 0 0 2px #fff;
    font-family: monospace;
    font-weight: 600;
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

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

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

/* Ranking Table */
.ranking-table {
    width: 100%;
    background: white;
    border-collapse: collapse;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
}

.ranking-table th {
    background: #34495e;
    color: white;
    padding: 1rem;
    text-align: left;
}

.ranking-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #eee;
}

.ranking-table tr:hover {
    background: #f8f9fa;
}

.current-ranking {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-top: 2rem;
}

/* Form Actions */
.form-actions {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
}

/* Footer */
.main-footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid #dee2e6;
    background: #f8f9fa;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    color: #6c757d;
    font-size: 0.9rem;
}

.footer-link {
    color: #495057;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link:hover {
    color: #212529;
    text-decoration: underline;
}

.footer-separator {
    color: #adb5bd;
}

.footer-copyright {
    margin: 0;
    color: #6c757d;
}

/* Responsive */
@media (max-width: 768px) {
    .quick-entry-table {
        font-size: 0.9rem;
    }
    
    .violators-input {
        width: 60px;
    }
    
    .dashboard-menu {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
}