:root {
    --Accent-Default: #00B1BA;
    --Text-Dark: #292A2A;
    --BG-Gray: #F3F4F5;
    --White: white;
}

* { box-sizing: border-box; }

.letters-section {
    background: var(--White);
    padding: 80px 0;
    font-family: 'Inter', sans-serif;
}

.letters-container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 0px;
}

/* ВЕРХНЯЯ СТРОКА */
.letters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 16px;
}

.letters-main-title {
    color: var(--Text-Dark) !important;
    font-size: 40px;
    font-weight: 600;
    margin: 0;
    line-height: 1.1;
}

.letters-nav {
    display: flex;
    gap: 12px;
}

.letters-arrow {
    width: 48px;
    height: 48px;
    background: var(--BG-Gray);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.1s;
}

.letters-arrow:hover {
    background: #e1e4e6;
}

.letters-arrow:active {
    transform: scale(0.95);
}

/* ОПИСАНИЕ */
.letters-desc {
    color: var(--Text-Dark) !important;
    font-size: 16px;
    line-height: 24px;
    margin-bottom: 40px;
    max-width: 800px;
}

/* СЛАЙДЕР И КАРТИНКИ */
.letters-swiper {
    overflow: hidden;
    padding-bottom: 5px;
}

.letter-img-box {
    position: relative;
    width: 100%;
    height: 459px; /* Высокие карточки как в Фигме */
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    background: var(--BG-Gray);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.letter-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.letter-img-box:hover img {
    transform: scale(1.05);
}

/* МОДАЛЬНОЕ ОКНО */
.letter-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.9);
    justify-content: center;
    align-items: center;
}

.letter-modal-content {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
    border-radius: 8px;
}

.letter-modal-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: white;
    font-size: 40px;
    font-weight: 300;
    cursor: pointer;
    z-index: 10000;
    line-height: 1;
}

.letter-modal-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: white;
    font-size: 30px;
    font-weight: 300;
    cursor: pointer;
    padding: 20px;
    z-index: 10000;
}

.letter-modal-nav.prev { left: 40px; }
.letter-modal-nav.next { right: 40px; }

/* АДАПТИВНОСТЬ (МОБИЛКИ) */
@media (max-width: 768px) {
    .letters-section {
        padding: 48px 0;
    }
    .letters-main-title {
        font-size: 28px;
    }
    .letters-header {
        margin-bottom: 16px;
    }
    .letter-img-box {
        height: 350px; /* Чуть ниже на мобилках */
    }
    .letter-modal-content {
        max-width: 95%;
    }
    .letter-modal-close {
        top: 15px;
        right: 15px;
        font-size: 30px;
    }
    .letter-modal-nav {
        padding: 10px;
    }
    .letter-modal-nav.prev { left: 5px; }
    .letter-modal-nav.next { right: 5px; }
}