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

body {
    background: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    padding: 12px;
    padding-bottom: 40px;
}

.header {
    text-align: center;
    margin-bottom: 16px;
}

.header h1 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.header .subtitle {
    font-size: 13px;
    color: var(--tg-theme-hint-color, #999999);
}

/* Табы переключения недель */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 16px;
    border-radius: 10px;
    overflow: hidden;
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
}

.tab {
    flex: 1;
    padding: 10px 0;
    text-align: center;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    background: transparent;
    color: var(--tg-theme-text-color, #000000);
}

.tab.active {
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
}

/* Дни-аккордеон */
.day-card {
    background: var(--tg-theme-secondary-bg-color, #f0f0f0);
    border-radius: 12px;
    margin-bottom: 8px;
    overflow: hidden;
}

.day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.day-header .day-name {
    font-weight: 600;
    font-size: 15px;
}

.day-header .day-count {
    font-size: 13px;
    color: var(--tg-theme-hint-color, #999999);
}

.day-header .arrow {
    font-size: 12px;
    transition: transform 0.2s;
    color: var(--tg-theme-hint-color, #999999);
}

.day-card.open .day-header .arrow {
    transform: rotate(180deg);
}

.day-card.today .day-header .day-name {
    color: var(--tg-theme-button-color, #3390ec);
}

.day-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.day-card.open .day-body {
    max-height: 2000px;
}

/* Карточки пар */
.lesson {
    padding: 8px 16px 12px;
    border-top: 1px solid var(--tg-theme-bg-color, #ffffff);
}

.lesson-time {
    font-size: 12px;
    color: var(--tg-theme-hint-color, #999999);
    margin-bottom: 2px;
}

.lesson-subject {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 2px;
}

.lesson-details {
    font-size: 12px;
    color: var(--tg-theme-hint-color, #999999);
}

.lesson-gap {
    padding: 6px 16px;
    border-top: 1px solid var(--tg-theme-bg-color, #ffffff);
    font-size: 12px;
    color: var(--tg-theme-hint-color, #999999);
    font-style: italic;
}

/* Пустой день */
.day-empty {
    padding: 8px 16px 12px;
    border-top: 1px solid var(--tg-theme-bg-color, #ffffff);
    font-size: 13px;
    color: var(--tg-theme-hint-color, #999999);
}

/* Скрытие контента для неактивной недели */
.week-content {
    display: none;
}

.week-content.active {
    display: block;
}