/* Общие стили */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f5f5f5;
    color: #333;
}

#auth-container, #app-container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

h1, h2, h3 {
    color: #2c3e50;
}

input, button, select, textarea {
    margin: 10px 0;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    width: 100%;
    box-sizing: border-box;
}

button {
    background: #3498db;
    color: white;
    cursor: pointer;
    border: none;
    transition: background 0.3s;
    width: auto;
}

button:hover {
    background: #2980b9;
}

button:disabled {
    background: #95a5a6;
    cursor: not-allowed;
}

/* Стили для сообщений */
.message {
    margin-top: 10px;
    padding: 10px;
    border-radius: 5px;
}

.error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

.success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

/* Стили для календаря */
.calendar-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
    gap: 15px;
    flex-wrap: wrap;
}

.calendar-nav button {
    margin: 0;
}

.calendar {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-weight: bold;
    padding: 10px;
    border-bottom: 1px solid #eee;
    background-color: #f8f9fa;
}

.weekdays div {
    padding: 10px;
}

.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    padding: 10px;
}

.day {
    border: 1px solid #eee;
    border-radius: 5px;
    padding: 10px;
    min-height: 100px;
    cursor: pointer;
    transition: all 0.2s;
}

.day:hover {
    background-color: #f9f9f9;
}

.day.other-month {
    opacity: 0.4;
    background-color: #f5f5f5;
}

.day.has-classes {
    background-color: #e8f5e9;
    border-color: #4caf50;
}

.day.today {
    background-color: #e3f2fd;
    border-color: #2196f3;
    font-weight: bold;
}

.day-number {
    font-weight: bold;
    margin-bottom: 5px;
}

.class-preview {
    font-size: 0.8em;
    background: #4caf50;
    color: white;
    padding: 2px 5px;
    border-radius: 3px;
    margin-top: 5px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Стили для деталей дня */
.day-details {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.class-item {
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 15px;
    margin: 10px 0;
}

.class-item h4 {
    margin: 0 0 10px 0;
    color: #2c3e50;
}

.class-item button {
    background: #2196F3;
}

.class-item button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* Стили для списка участников */
.participants-list {
    margin: 15px 0;
    padding: 12px;
    background-color: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #4CAF50;
}

.participants-list strong {
    display: block;
    margin-bottom: 8px;
    color: #2c3e50;
    font-size: 14px;
}

.participants-list ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

.participants-list li {
    padding: 6px 0;
    border-bottom: 1px solid #e9ecef;
    font-size: 14px;
    color: #495057;
}

.participants-list li:last-child {
    border-bottom: none;
}

.participants-list .more-participants {
    font-style: italic;
    color: #6c757d;
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    border-radius: 10px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    position: absolute;
    top: 10px;
    right: 15px;
    cursor: pointer;
}

.close:hover {
    color: #000;
}

/* Стили для админ-панели */
.admin-panel {
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
}

.admin-panel h3 {
    margin-top: 0;
    color: #856404;
}

.admin-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.admin-form .full-width {
    grid-column: 1 / -1;
}

.admin-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #495057;
}

.admin-form button {
    background: #28a745;
}

.admin-form button:hover {
    background: #218838;
}

.cancel-btn {
    background-color: #dc3545 !important;
}

.cancel-btn:hover {
    background-color: #c82333 !important;
}

/* Адаптивность */
@media (max-width: 768px) {
    .day {
        min-height: 70px;
        padding: 5px;
    }
    
    .class-preview {
        display: none;
    }
    
    .weekdays div {
        padding: 5px;
        font-size: 0.8em;
    }
    
    .calendar-nav {
        flex-direction: column;
        gap: 10px;
    }
    
    .admin-form {
        grid-template-columns: 1fr;
    }
}