/* FAQ: вопросы, состояния открытия и анимация ответов. */

/* Каркас секции */
#faq {
    padding-block: clamp(6rem, 9vw, 7.5rem);
    scroll-margin-top: 5rem;
    position: relative;
    isolation: isolate;
    overflow: hidden;
}

#faq .faq-section {
    display: grid;
    grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr);
    gap: clamp(3rem, 8vw, 8rem);
    max-width: 1180px;
}

#faq .faq-header h2 {
    color: var(--text-primary);
    font-size: clamp(2.25rem, 4vw, 3.25rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
    text-wrap: balance;
}

/* Список и измерительное состояние */
#faq .faq-list {
    border-block-start: 1px solid var(--border);
    min-block-size: var(--faq-list-reserved-height, auto);
}

#faq .faq-list.is-measuring,
#faq .faq-list.is-measuring .faq-answer {
    min-block-size: 0 !important;
    transition: none !important;
}

#faq .faq-item {
    border-block-end: 1px solid var(--border);
}

/* Заголовок вопроса */
#faq .faq-item summary {
    display: grid;
    grid-template-columns: 2.5rem minmax(0, 1fr) 2.75rem;
    align-items: center;
    gap: 1rem;
    min-height: 5.25rem;
    padding-block: 1rem;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
}

#faq .faq-item summary::-webkit-details-marker {
    display: none;
}

#faq .faq-item summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

#faq .faq-number {
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

#faq .faq-question {
    font-size: clamp(1.05rem, 1.8vw, 1.3rem);
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: -0.02em;
    text-wrap: pretty;
}

/* Индикатор открытия */
#faq .faq-toggle {
    position: relative;
    width: 2.75rem;
    height: 2.75rem;
    justify-self: end;
    color: var(--text-secondary);
}

#faq .faq-toggle::before,
#faq .faq-toggle::after {
    content: '';
    position: absolute;
    inset-block-start: 50%;
    inset-inline-start: 50%;
    width: 1rem;
    height: 1px;
    background: currentColor;
    transform: translate(-50%, -50%);
    transition-property: transform, opacity;
    transition-duration: 0.18s;
    transition-timing-function: ease-out;
}

#faq .faq-toggle::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

#faq .faq-item.is-open .faq-toggle::after {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(0deg);
}

#faq .faq-item.is-open .faq-toggle {
    color: var(--accent);
}

/* Ответ и состояния раскрытия */
#faq .faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    padding-top: 0;
    padding-bottom: 0;
    padding-inline: 3.5rem 3.75rem;
    opacity: 0;
    transition-property: grid-template-rows, opacity, padding-bottom;
    transition-duration: 0.28s;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    will-change: grid-template-rows, opacity, padding-bottom;
}

#faq .faq-answer > * {
    overflow: hidden;
    min-height: 0;
}

#faq .faq-item.is-open .faq-answer {
    grid-template-rows: 1fr;
    padding-bottom: 2.5rem;
    opacity: 1;
}

#faq .faq-item.is-closing .faq-answer {
    grid-template-rows: 0fr;
    padding-bottom: 0;
    opacity: 0;
}

#faq .faq-answer p {
    max-width: 62ch;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
    overflow-wrap: anywhere;
}

/* Hover-состояние */
@media (hover: hover) and (pointer: fine) {
    #faq .faq-item summary:hover .faq-question,
    #faq .faq-item summary:hover .faq-toggle {
        color: var(--accent);
    }
}

/* Адаптивная компоновка */
@media (max-width: 720px) {
    #faq {
        padding-block: 5.25rem;
    }

    #faq .faq-section {
        grid-template-columns: minmax(0, 1fr);
        gap: 2.25rem;
    }

    #faq .faq-item summary {
        grid-template-columns: 1.75rem minmax(0, 1fr) 2.75rem;
        gap: 0.75rem;
        min-height: 4.75rem;
    }

    #faq .faq-question {
        font-size: 1.05rem;
    }

    #faq .faq-answer {
        padding-block: 0;
        padding-inline: 2.5rem 0;
    }
}

/* Уменьшенное движение */
@media (prefers-reduced-motion: reduce) {
    #faq .faq-toggle::before,
    #faq .faq-toggle::after {
        transition: none;
    }

    #faq .faq-answer {
        transition: none;
    }
}