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

/* Темы: светлая (по умолчанию) и тёмная */
:root {
    --bg-page: #f5f5f5;
    --text: #333;
    --text-muted: #555;
    --bg-card: #fff;
    --border: #e3e5e8;
    --border-table: #ddd;
    --navbar-bg: #37DB84;
    --navbar-text: #1a1a1a;
    --accent: #37DB84;
    --accent-hover: #2ec973;
    --input-bg: #fff;
    --input-border: #ddd;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --schedule-time-bg: #f8f9fa;
    --hover-bg: #f8f9fa;
    --chat-bubble-in: #fff;
    --chat-bubble-out: #e3f2fd;
    --chat-page-bg: #f0f2f5;
    --modal-overlay: rgba(0,0,0,0.5);
    --close-color: #999;
    --close-hover: #333;
}
html.theme-dark {
    --bg-page: #121212;
    --text: #e0e0e0;
    --text-muted: #b0b0b0;
    --bg-card: #1e1e1e;
    --border: #3a3a3a;
    --border-table: #404040;
    --navbar-bg: #1a4729;
    --navbar-text: #e0e0e0;
    --accent: #37DB84;
    --accent-hover: #4ae696;
    --input-bg: #2d2d2d;
    --input-border: #404040;
    --shadow: 0 2px 8px rgba(0,0,0,0.4);
    --schedule-time-bg: #252525;
    --hover-bg: #2d2d2d;
    --chat-bubble-in: #2d2d2d;
    --chat-bubble-out: #1a3d2a;
    --chat-page-bg: #1a1a1a;
    --modal-overlay: rgba(0,0,0,0.7);
    --close-color: #888;
    --close-hover: #e0e0e0;
}

a {
    text-decoration: none;
}

body {
    font-family: 'Tenor Sans', sans-serif;
    background-color: var(--bg-page);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.2s, color 0.2s;
}

h1, h2, h3, h4, .card-title, .nav-logo {
    font-family: 'Unbounded', sans-serif;
    font-weight: 500;
}

.navbar {
    background-color: var(--navbar-bg);
    color: var(--navbar-text);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    transition: background-color 0.2s, color 0.2s;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    color: var(--navbar-text);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-user {
    color: var(--navbar-text);
}

.nav-link {
    color: var(--navbar-text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: rgba(0,0,0,0.08);
}

/* Кнопка переключения темы */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 8px;
    background: rgba(0,0,0,0.08);
    color: var(--navbar-text);
    cursor: pointer;
    font-size: 1.25rem;
    transition: background 0.2s;
}
.theme-toggle:hover {
    background: rgba(0,0,0,0.15);
}
html.theme-dark .theme-toggle {
    background: rgba(255,255,255,0.12);
}
html.theme-dark .theme-toggle:hover {
    background: rgba(255,255,255,0.2);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    display: none;
}
html:not(.theme-dark) .theme-toggle .icon-sun {
    display: inline;
}
html.theme-dark .theme-toggle .icon-moon {
    display: inline;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* На странице расписания контейнер на всю ширину экрана с отступами */
.container:has(.schedule-page) {
    max-width: none;
    width: 100%;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    box-sizing: border-box;
}

/* Чаты репетитора: фиксированная высота под экран, поле ввода всегда внизу */
.container:has(.tutor-chats-page) {
    max-width: none;
    width: 100%;
    margin: 0;
    padding: 0;
    height: calc(100vh - 56px);
    max-height: calc(100vh - 56px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.tutor-chats-page {
    display: flex;
    flex: 1;
    min-height: 0;
    max-height: 100%;
    overflow: hidden;
    background: var(--chat-page-bg);
    transition: background-color 0.2s;
}
.tutor-chats-sidebar {
    width: 320px;
    min-width: 280px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}
.tutor-chats-sidebar h2 {
    padding: 1rem 1rem 0.5rem;
    margin: 0;
    font-size: 1.1rem;
    color: var(--text);
}
.tutor-chat-card {
    display: block;
    padding: 0.75rem 1rem;
    border: none;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
    text-align: left;
    cursor: pointer;
    transition: background 0.15s;
    text-decoration: none;
    color: inherit;
    font-size: 1rem;
}
.tutor-chat-card:hover {
    background: var(--hover-bg);
}
.tutor-chat-card.active {
    background: var(--chat-bubble-out);
    border-left: 3px solid var(--accent);
    padding-left: calc(1rem - 3px);
}
.tutor-chat-card {
    position: relative;
}
.tutor-chat-card-label {
    display: block;
    padding-right: 1.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tutor-chat-card-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.35rem;
    border-radius: 10px;
    background: #37DB84;
    color: #1a1a1a;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.tutor-chat-card.active .tutor-chat-card-badge {
    background: #2688eb;
    color: #fff;
}
.tutor-chats-empty-hint {
    padding: 1rem;
    margin: 0;
    color: var(--text-muted);
}
.tutor-chats-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    max-height: 100%;
    background: var(--bg-card);
    overflow: hidden;
    transition: background-color 0.2s;
}
.tutor-chats-main-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1rem;
}
/* Панель чата: заголовок сверху, сообщения по центру с прокруткой, поле ввода прижато к низу */
.tutor-chats-panel {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}
.tutor-chats-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
    color: var(--text);
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}
.tutor-chats-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem;
    min-height: 0;
    background: var(--bg-page);
    transition: background-color 0.2s;
}
.tutor-chats-send {
    flex-shrink: 0;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.tutor-chats-send-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.tutor-chats-send-row input[type="text"] {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    font-size: 1rem;
    min-width: 0;
    background: var(--input-bg);
    color: var(--text);
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}
.tutor-chats-attach-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.5rem 0.85rem;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    flex-shrink: 0;
}
.tutor-chats-attach-btn:hover {
    background: var(--hover-bg);
    border-color: var(--border);
}
.tutor-chats-attach-icon {
    font-size: 1.1rem;
}
.tutor-chats-send-btn {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: none;
    background: var(--accent);
    color: #1a1a1a;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    flex-shrink: 0;
    transition: background-color 0.2s;
}
.tutor-chats-send-btn:hover {
    background: var(--accent-hover);
}
.tutor-chats-file-preview {
    padding: 0.5rem 0;
    border-top: 1px dashed var(--border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.tutor-chats-file-preview-img {
    max-width: 120px;
    max-height: 90px;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid var(--border);
}
.tutor-chats-file-preview-vid {
    max-width: 160px;
    max-height: 100px;
    border-radius: 8px;
    border: 1px solid var(--border);
}
.tutor-chats-file-preview-name {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tutor-chats-file-preview-remove {
    margin-left: auto;
    padding: 0.2rem 0.5rem;
    border: none;
    border-radius: 4px;
    background: var(--hover-bg);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
}
.tutor-chats-file-preview-remove:hover {
    background: var(--border);
    color: var(--text);
}
.tutor-msg {
    margin-bottom: 0.75rem;
    clear: both;
}
.tutor-msg.out { text-align: right; }
.tutor-msg .bubble {
    display: inline-block;
    max-width: 85%;
    padding: 0.5rem 0.75rem;
    border-radius: 12px;
    text-align: left;
}
.tutor-msg.out .bubble { background: var(--chat-bubble-out); margin-left: auto; }
.tutor-msg.in .bubble { background: var(--chat-bubble-in); border: 1px solid var(--border); }
.tutor-msg .sender { font-size: 0.85em; color: var(--text-muted); margin-bottom: 0.25rem; }
.tutor-msg .content { word-break: break-word; color: var(--text); }
.tutor-msg .content a { color: var(--accent); }
.chat-media-preview { display: block; margin-top: 0.5rem; border-radius: 8px; max-width: 100%; }
.chat-media-photo { max-width: 280px; max-height: 280px; object-fit: contain; cursor: pointer; }
.chat-media-video { max-width: 320px; max-height: 240px; }
.chat-media-doc { display: inline-block; margin-top: 0.25rem; }

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.login-box {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    transition: background-color 0.2s;
}

.login-box h1 {
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 1rem;
    background: var(--input-bg);
    color: var(--text);
    transition: border-color 0.2s, background-color 0.2s, color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Чекбоксы рассылки: подпись справа от чекбокса в одну строку */
.broadcast-option,
.broadcast-client {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
}
.broadcast-option input,
.broadcast-client input {
    width: auto;
    margin: 0;
    flex-shrink: 0;
}
.broadcast-client {
    display: flex;
}
.form-group .broadcast-option,
.form-group .broadcast-client {
    margin-bottom: 0;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    text-decoration: none;
    display: inline-block;
    font-family: 'Tenor Sans', sans-serif;
}

.btn-primary {
    background-color: var(--accent);
    color: #1a1a1a;
    width: 100%;
}

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

.btn-success {
    background-color: var(--accent);
    color: #1a1a1a;
}

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

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

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

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

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

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-success {
    background-color: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}

.alert-info {
    background-color: #eef;
    color: #33c;
    border: 1px solid #ccf;
}

.card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    transition: background-color 0.2s, box-shadow 0.2s;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: -1.5rem -1.5rem 1rem -1.5rem;
    padding: 1rem 1.5rem;
    background-color: var(--accent);
    border-radius: 8px 8px 0 0;
    border-bottom: none;
}

.card-header h2 {
    margin: 0;
    color: #1a1a1a;
}

.card-header .btn {
    width: auto;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text);
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-table);
    color: var(--text);
}

.table th {
    background-color: var(--accent);
    font-weight: 600;
    color: #1a1a1a;
    font-family: 'Unbounded', sans-serif;
    font-weight: 500;
}

.table tr:hover {
    background-color: var(--hover-bg);
}

/* Страница расписания: карточка и таблица растягиваются на всю ширину контейнера */
.schedule-page {
    width: 100%;
}

.schedule-page .card {
    max-width: none;
}

.schedule-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

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

.schedule-table th,
.schedule-table td {
    border: 1px solid var(--border-table);
    padding: 0.5rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text);
}

/* Утолщённые чёрные границы на границах каждого часа (не на ячейках занятий) */
.schedule-table tr.hour-boundary-top td:not(.lesson) {
    border-top-width: 2px;
    border-top-color: #000;
}

.schedule-table tr.hour-boundary-bottom td:not(.lesson) {
    border-bottom-width: 2px;
    border-bottom-color: #000;
}

.schedule-table th {
    background-color: var(--accent);
    color: #1a1a1a;
    position: sticky;
    top: 0;
    z-index: 10;
}

.time-cell {
    background-color: var(--schedule-time-bg);
    font-weight: 600;
    width: 90px;
    min-width: 90px;
    position: sticky;
    left: 0;
    z-index: 5;
    vertical-align: middle;
    text-align: center;
    border: 1px solid var(--border-table);
    font-size: 0.9rem;
    color: var(--text);
}

.schedule-cell {
    min-width: 140px;
    min-height: 48px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.schedule-cell:hover {
    background-color: var(--hover-bg);
}

.schedule-cell.blocked {
    background-color: #95a5a6;
    cursor: not-allowed;
}

.schedule-cell.lesson {
    background-color: var(--accent);
    color: #1a1a1a;
    cursor: move;
    position: relative;
    vertical-align: top;
}

.schedule-cell.lesson .lesson-cell-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: 0.5rem;
    box-sizing: border-box;
}

.schedule-cell.lesson .lesson-name {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.schedule-cell.lesson .lesson-name.completed {
    text-decoration: line-through;
}

.schedule-cell.lesson .lesson-time {
    align-self: flex-end;
    font-size: 0.75rem;
    opacity: 0.95;
    margin-top: 0.25rem;
}

.schedule-cell.drop-target {
    background-color: #a8e6cf !important;
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.schedule-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.week-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-overlay);
}

.modal-content {
    background-color: var(--bg-card);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    color: var(--text);
    transition: background-color 0.2s, color 0.2s;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.close {
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--close-color);
}

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

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.dashboard-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: background-color 0.2s, box-shadow 0.2s;
}

.dashboard-card h3 {
    margin-bottom: 1rem;
    color: var(--text);
}

.dashboard-stat {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

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

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

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

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

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-item input[type="checkbox"] {
    width: auto;
    margin: 0;
    cursor: pointer;
}

.checkbox-item label {
    margin: 0;
    cursor: pointer;
    font-weight: normal;
}

.admin-back {
    margin-bottom: 1rem;
}

/* ========== Адаптивная вёрстка ========== */

/* Планшеты и узкие экраны (≤768px) */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    .nav-logo {
        font-size: 1.25rem;
    }
    .container {
        margin: 1rem auto;
        padding: 0 1rem;
    }
    .container:has(.tutor-chats-page) {
        padding: 0 0.75rem;
        height: calc(100vh - 52px);
        max-height: calc(100vh - 52px);
    }
    .tutor-chats-page {
        flex-direction: column;
        min-height: 0;
    }
    .tutor-chats-sidebar {
        width: 100%;
        min-width: 0;
        max-height: 35vh;
        border-right: none;
        border-bottom: 1px solid #e3e5e8;
        flex-shrink: 0;
    }
    .tutor-chats-main {
        flex: 1;
        min-height: 200px;
    }
    .schedule-page .card,
    .container:has(.schedule-page) {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }
    .schedule-controls {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    .week-selector {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .schedule-container {
        margin: 0 -0.5rem;
        padding: 0 0.25rem;
    }
    .schedule-cell {
        min-width: 72px;
    }
    .time-cell {
        width: 60px;
        min-width: 60px;
        font-size: 0.8rem;
    }
    .schedule-table th,
    .schedule-table td {
        padding: 0.35rem;
        font-size: 0.85rem;
    }
    .card {
        padding: 1rem;
        overflow-x: auto;
    }
    .card-header {
        margin: -1rem -1rem 1rem -1rem;
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .card-header h2 {
        font-size: 1.1rem;
    }
    .modal-content {
        margin: 10% 1rem;
        padding: 1.25rem;
        width: auto;
        max-width: none;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-top: 1rem;
    }
    .form-actions {
        flex-wrap: wrap;
    }
    .tutor-chats-send-row {
        flex-wrap: wrap;
    }
    .tutor-chats-attach-btn .tutor-chats-attach-text {
        display: none;
    }
    .tutor-msg .bubble {
        max-width: 92%;
    }
    .chat-media-photo {
        max-width: 100%;
        max-height: 200px;
    }
    .chat-media-video {
        max-width: 100%;
        max-height: 200px;
    }
}

/* Телефоны (≤480px) */
@media (max-width: 480px) {
    .navbar {
        padding: 0.75rem 0;
    }
    .nav-container {
        padding: 0 0.75rem;
    }
    .nav-logo {
        font-size: 1.1rem;
    }
    .nav-link {
        padding: 0.4rem 0.75rem;
        font-size: 0.95rem;
    }
    .container {
        margin: 0.75rem auto;
        padding: 0 0.75rem;
    }
    .container:has(.tutor-chats-page) {
        padding: 0 0.5rem;
    }
    .admin-back {
        margin-bottom: 0.75rem;
    }
    .admin-back .btn {
        padding: 0.5rem 1rem;
        font-size: 0.95rem;
    }
    .tutor-chats-sidebar h2 {
        font-size: 1rem;
        padding: 0.75rem;
    }
    .tutor-chat-card {
        padding: 0.6rem 0.75rem;
        font-size: 0.95rem;
    }
    .tutor-chats-header {
        font-size: 0.95rem;
        padding: 0.6rem 0.75rem;
    }
    .tutor-chats-messages {
        padding: 0.75rem;
    }
    .tutor-chats-send {
        padding: 0.5rem 0.75rem;
    }
    .tutor-chats-send-row input[type="text"] {
        font-size: 16px; /* предотвращает зум при фокусе на iOS */
    }
    .schedule-page .card {
        padding: 0.75rem;
    }
    .schedule-controls {
        flex-direction: column;
        align-items: stretch;
    }
    #actionButtons {
        flex-wrap: wrap;
    }
    .schedule-cell {
        min-width: 56px;
        min-height: 40px;
    }
    .time-cell {
        width: 48px;
        min-width: 48px;
        font-size: 0.75rem;
    }
    .schedule-table th,
    .schedule-table td {
        padding: 0.25rem;
        font-size: 0.8rem;
    }
    .schedule-cell.lesson .lesson-name {
        font-size: 0.75rem;
    }
    .schedule-cell.lesson .lesson-time {
        font-size: 0.65rem;
    }
    .card {
        padding: 0.75rem;
        margin-bottom: 1rem;
    }
    .card-header {
        margin: -0.75rem -0.75rem 0.75rem -0.75rem;
        padding: 0.6rem 0.75rem;
    }
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.95rem;
    }
    .login-box {
        padding: 1.25rem;
        margin: 0 0.5rem;
    }
    .modal-content {
        margin: 5% 0.5rem;
        padding: 1rem;
    }
    .modal-header h3 {
        font-size: 1.1rem;
    }
    .close {
        font-size: 1.5rem;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 0.6rem;
    }
    .table {
        font-size: 0.9rem;
    }
    .table th,
    .table td {
        padding: 0.5rem 0.35rem;
    }
    .dashboard-card {
        padding: 1rem;
    }
    .dashboard-card h3 {
        font-size: 1.1rem;
    }
    .dashboard-stat {
        font-size: 1.5rem;
    }
    .tutor-chats-file-preview-name {
        max-width: 120px;
    }
}

/* Горизонтальная ориентация на маленькой высоте: чаты */
@media (max-width: 768px) and (max-height: 500px) {
    .tutor-chats-sidebar {
        max-height: 28vh;
    }
}