body {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 24px 16px;
    padding-top: max(24px, env(safe-area-inset-top));
    padding-bottom: max(24px, env(safe-area-inset-bottom));
}

.card {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px 28px;
    position: relative;
}

.card__header {
    margin-bottom: 28px;
    text-align: center;
    position: relative;
}

.card__title {
    font-size: 28px;
    font-weight: 300;
    color: var(--fg);
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.card__subtitle {
    color: var(--fg-muted);
    font-size: 15px;
}

.card__footer {
    margin-top: 28px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--fg-light);
    text-align: center;
}

/* Экраны */
.screen {
    display: none;
}

.screen--active {
    display: block;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Кнопка «Назад» */
.back {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--fg-muted);
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    transition: background 0.15s, color 0.15s;
}

.back:hover {
    background: var(--bg);
    color: var(--fg);
}

/* Мобильная адаптация */
@media (max-width: 480px) {
    body {
        padding: 12px;
        padding-top: max(12px, env(safe-area-inset-top));
        padding-bottom: max(12px, env(safe-area-inset-bottom));
    }
    .card {
        padding: 24px 20px;
    }
    .card__title { font-size: 24px; }
}

/* Динамическая высота viewport — учитывает мобильную клавиатуру */
body {
    min-height: 100vh;
    min-height: 100dvh;
}

body {
    scroll-padding-bottom: 40vh;
}