/* Screen Reader Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus indicators for accessibility */
button:focus,
select:focus,
.search-filter:focus {
    outline: 2px solid var(--tg-theme-button-color);
    outline-offset: 2px;
}

/* Performance optimizations */
* {
    box-sizing: border-box;
}

:root {
    --tg-theme-bg-color: #fff;
    --tg-theme-text-color: #000;
    --tg-theme-hint-color: #999;
    --tg-theme-link-color: #2678b6;
    --tg-theme-button-color: #2678b6;
    --tg-theme-button-text-color: #fff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 20px; /* +4px */
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    font-size: 16px; /* базовый размер */
}

.schedule-container {
    display: flex;
    flex-direction: column;
    gap: 10px; /* +2px */
}

.day-header {
    font-weight: 700;
    padding: 12px; /* +4px */
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border-radius: 10px; /* +2px */
    font-size: 18px; /* + */
}

.lesson-block {
    border: 1px solid #ddd;
    border-radius: 10px; /* +2px */
    padding: 14px; /* +2px */
    margin-bottom: 10px; /* +2px */
}

.time-slot {
    font-weight: 700;
    color: var(--tg-theme-button-color);
    margin-bottom: 6px; /* +2px */
    font-size: 15px; /* + */
}

.subject {
    font-size: 17px; /* +1 */
    margin-bottom: 6px; /* +2 */
}

.details {
    font-size: 15px; /* +1 */
    color: var(--tg-theme-hint-color);
}

/* Search filter wrapper */
.search-wrapper {
    width: 100%;
    margin-bottom: 8px;
}

.search-filter {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    font-size: 14px;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s ease;
}

.search-filter:focus {
    border-color: var(--tg-theme-button-color);
}

.search-filter::placeholder {
    color: var(--tg-theme-hint-color);
}

/* Custom Select */
.custom-select {
    width: 100%;
    margin-bottom: 18px;
    position: relative;
}

.selected-option {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 10px;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: border-color 0.2s ease;
}

.selected-option:focus {
    outline: 2px solid var(--tg-theme-button-color);
    outline-offset: 2px;
}

.selected-option::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--tg-theme-text-color);
    transition: transform 0.2s ease;
}

.custom-select.open .selected-option::after {
    transform: rotate(180deg);
}

.options-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 200px;
    overflow-y: auto;
    background-color: var(--tg-theme-bg-color);
    border: 1px solid #ddd;
    border-top: none;
    border-radius: 0 0 10px 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: none;
}

.custom-select.open .options-list {
    display: block;
}

.option-item {
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid #eee;
    transition: background-color 0.2s ease;
    font-size: 16px;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
}

.option-item:last-child {
    border-bottom: none;
}

.option-item:hover,
.option-item.highlighted {
    background-color: rgba(38, 120, 182, 0.1);
}

.option-item.selected {
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

.nav-buttons {
    display: flex;
    gap: 10px; /* +2 */
    margin-bottom: 18px; /* +2 */
}

.nav-button {
    flex: 1;
    padding: 8px; /* reduced */
    border: none;
    border-radius: 8px; /* reduced */
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    cursor: pointer;
    font-size: 14px; /* slightly smaller to offset base font increase */
}

.empty-schedule {
    text-align: center;
    padding: 22px; /* +2 */
    color: var(--tg-theme-hint-color);
}

.current-date {
    text-align: center;
    padding: 14px; /* +2 */
    margin-bottom: 18px; /* +2 */
    font-size: 16px;
    color: var(--tg-theme-hint-color);
}

.schedule-date {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 16px;
    color: var(--tg-theme-text-color);
}

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

.modal-content {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: var(--tg-theme-bg-color);
    border-radius: 14px 14px 0 0; /* + */
    padding: 22px; /* + */
}

/* Calendar container */
.calendar-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 320px;
    margin: 0 auto;
}

/* Calendar header with navigation */
.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
}

.calendar-nav-btn {
    background: var(--tg-theme-button-color, #2678b6);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.calendar-nav-btn:hover {
    background: var(--tg-theme-button-color, #1e5a96);
    opacity: 0.8;
}

.calendar-month-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--tg-theme-text-color, #000000);
    margin: 0;
    text-align: center;
    flex: 1;
}

/* Calendar weekdays */
.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 8px;
}

.calendar-weekday {
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--tg-theme-hint-color, #999999);
    padding: 8px 4px;
}

/* Calendar grid */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 400;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    background: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    border: 1px solid transparent;
}

.calendar-day:hover {
    background: var(--tg-theme-secondary-bg-color, #f1f1f1);
}

.calendar-day.other-month {
    color: var(--tg-theme-hint-color, #999999);
    opacity: 0.5;
}

.calendar-day.today {
    border: 2px solid #000000;
    font-weight: 600;
}

.calendar-day.selected {
    background: var(--tg-theme-button-color, #2678b6);
    color: var(--tg-theme-button-text-color, #ffffff);
    border: 2px solid var(--tg-theme-button-color, #2678b6);
    font-weight: 600;
}

/* Dot indicator for days with lessons */
.calendar-day.has-lessons::after {
    content: '';
    position: absolute;
    top: 4px;
    right: 4px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--tg-theme-button-color, #2678b6);
}

/* Dot for selected day with lessons */
.calendar-day.selected.has-lessons::after {
    background: var(--tg-theme-button-text-color, #ffffff);
}

/* Dot for today with lessons */
.calendar-day.today.has-lessons::after {
    background: var(--tg-theme-button-color, #2678b6);
}

/* Calendar buttons */
.calendar-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
}

.modal-button {
    flex: 1;
    padding: 14px; /* was 12px */
    border: none;
    border-radius: 10px;
    font-size: 18px; /* was 16px */
    cursor: pointer;
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

.modal-button.confirm {
    background-color: var(--tg-theme-button-color);
}

.mode-switcher {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    gap: 12px;
    margin-bottom: 12px;
    /* Telegram Desktop fixes */
    flex-wrap: nowrap;
    position: relative;
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto;
}
.mode-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--tg-theme-bg-color);
    border: 2px solid var(--tg-theme-button-color);
    border-radius: 8px;
    padding: 6px 12px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    pointer-events: auto;
    -webkit-tap-highlight-color: transparent;
    /* Telegram Desktop fixes */
    touch-action: manipulation;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    outline: none;
}
.mode-btn.active {
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}
.mode-btn svg {
    display: block;
}

.user-info {
    text-align: center;
    font-size: 14px;
    color: var(--tg-theme-hint-color);
    margin: -6px 0 12px 0;
}

.teacher-link, .group-link {
    cursor: pointer;
    text-decoration: underline;
    color: var(--tg-theme-link-color);
    display: inline-block;
    pointer-events: auto;
}

.linklike {
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    color: var(--tg-theme-link-color);
    text-decoration: underline;
    cursor: pointer;
    font: inherit;
}



@media (max-width: 600px) {
    .modal-content {
        padding: 8px;
        border-radius: 10px 10px 0 0;
    }
    .calendar-container {
        gap: 15px;
        max-width: 300px;
    }
    .calendar-header {
        padding: 0 5px;
    }
    .calendar-nav-btn {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
    .calendar-month-title {
        font-size: 16px;
    }
    .calendar-day {
        font-size: 13px;
        min-height: 36px;
    }
    .calendar-buttons {
        gap: 4px;
    }
    .modal-button {
        padding: 10px; /* was 8px */
        font-size: 16px; /* was 14px */
    }
}

/* Для очень маленьких экранов */
@media (max-width: 400px) {
    .modal-content {
        padding: 4px;
    }
    .wheel {
        font-size: 14px; /* was 12px */
        height: 40px; /* was 32px */
        padding: 4px 18px 4px 4px;
    }
    .modal-button {
        font-size: 14px; /* was 12px */
        padding: 8px; /* was 6px */
    }
}

/* Стили для веб-баннера */
.web-banner {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: linear-gradient(135deg, #0088cc 0%, #006ba3 100%);
    color: white;
    padding: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 16px; /* Отступ между баннером и контентом */
}

.telegram-banner {
    max-width: 500px;
    margin: 0 auto;
}

.telegram-banner div:first-child {
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
}

.telegram-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.telegram-btn {
    display: inline-block;
    background: #fff;
    color: #0088cc;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s ease;
}

.telegram-btn:hover {
    background: #f0f0f0;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.telegram-btn.secondary {
    background: #333;
    color: #fff;
}

.telegram-btn.secondary:hover {
    background: #555;
}

/* Адаптивность для веб-баннера */
@media (max-width: 480px) {
    .telegram-banner div:first-child {
        font-size: 13px;
        margin-bottom: 10px;
    }
    
    .telegram-buttons {
        /* Кнопки остаются в ряд даже на мобильных */
        flex-direction: row;
        justify-content: center;
        gap: 6px;
    }

    .telegram-btn {
        padding: 6px 12px;
        font-size: 12px;
        /* Убираем фиксированную ширину для лучшей адаптивности */
    }
}