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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
    line-height: 1.6;
    overflow-x: hidden;
}

#app {
    min-height: 100vh;
    position: relative;
}

.screen {
    display: none;
    min-height: 100vh;
    padding: 0;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

.header {
    background: var(--tg-theme-header-bg-color, #3390ec);
    color: var(--tg-theme-header-text-color, #ffffff);
    padding: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header h1, .header h2 {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

.back-btn {
    background: none;
    border: none;
    color: var(--tg-theme-header-text-color, #ffffff);
    font-size: 16px;
    padding: 8px 0;
    cursor: pointer;
    margin-bottom: 8px;
}

.content {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
}

/* Загрузка */
#loading {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.loader {
    border: 4px solid var(--tg-theme-hint-color, #e0e0e0);
    border-top: 4px solid var(--tg-theme-button-color, #3390ec);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Список экспертов */
.experts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.expert-card {
    background: var(--tg-theme-secondary-bg-color, #f1f1f1);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--tg-theme-hint-color, #e0e0e0);
}

.expert-card:active {
    transform: scale(0.98);
}

.expert-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.expert-photo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--tg-theme-hint-color, #e0e0e0);
}

.expert-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.expert-info p {
    font-size: 14px;
    color: var(--tg-theme-hint-color, #999999);
}

.expert-description {
    font-size: 14px;
    color: var(--tg-theme-text-color, #000000);
    margin-top: 8px;
    line-height: 1.4;
}

/* Календарь */
.calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-bottom: 24px;
}

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

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    background: var(--tg-theme-secondary-bg-color, #f1f1f1);
    border: 1px solid var(--tg-theme-hint-color, #e0e0e0);
    transition: all 0.2s;
}

.calendar-day.available {
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
    border-color: var(--tg-theme-button-color, #3390ec);
}

.calendar-day.available:active {
    transform: scale(0.95);
}

.calendar-day.disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.calendar-day.today {
    border: 2px solid var(--tg-theme-button-color, #3390ec);
}

/* Временные слоты */
.time-slots {
    margin-top: 24px;
}

.time-slots h3 {
    margin-bottom: 12px;
    font-size: 18px;
}

.times-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.time-slot {
    padding: 12px;
    text-align: center;
    border-radius: 8px;
    background: var(--tg-theme-secondary-bg-color, #f1f1f1);
    border: 1px solid var(--tg-theme-hint-color, #e0e0e0);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.time-slot:active {
    transform: scale(0.95);
}

.time-slot.selected {
    background: var(--tg-theme-button-color, #3390ec);
    color: var(--tg-theme-button-text-color, #ffffff);
    border-color: var(--tg-theme-button-color, #3390ec);
}

/* Форма */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--tg-theme-hint-color, #e0e0e0);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    background: var(--tg-theme-bg-color, #ffffff);
    color: var(--tg-theme-text-color, #000000);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--tg-theme-button-color, #3390ec);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Сводка бронирования */
.booking-summary {
    background: var(--tg-theme-secondary-bg-color, #f1f1f1);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 24px;
}

.booking-summary h3 {
    margin-bottom: 12px;
    font-size: 16px;
}

.booking-summary p {
    margin-bottom: 8px;
    font-size: 14px;
}

/* Кнопки */
.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

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

.btn-primary:active {
    opacity: 0.8;
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Экран успеха/ошибки */
.success-icon,
.error-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

#success,
#error {
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 32px;
}

#success h2,
#error h2 {
    margin-bottom: 16px;
    font-size: 24px;
}

#success p,
#error p {
    margin-bottom: 24px;
    font-size: 16px;
    color: var(--tg-theme-hint-color, #999999);
}

/* Адаптивность */
@media (max-width: 480px) {
    .times-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .calendar {
        gap: 4px;
    }
}