/* ==========================================================================
   1. CSS ПЕРЕМЕННЫЕ (VARIABLES)
   ========================================================================== */
:root {
    /* Цветовая палитра */
    --color-dark: #1A1A1A;          /* Основной цвет текста, кнопок и элементов */
    --color-dark-hover: #2E2E2E;    /* Цвет при наведении на темные элементы */
    --color-muted: #5A5A5A;         /* Вторичный цвет текста (описание, подписи) */
    --color-muted-light: #8E8E8E;   /* Дополнительный приглушенный цвет */
    --color-white: #FFFFFF;         /* Белый цвет */
    --color-bg-fallback: rgb(254, 254, 254); /* Точный цвет фона страницы */
    
    /* Шрифты */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Сетки и размеры */
    --container-max-width: 1920px;  /* Максимальная ширина макета */
    --container-padding: 80px;      /* Точные отступы по бокам */

    /* Переходы (Транзишены) */
    --transition-default: all 0.3s ease-in-out;
}

/* ==========================================================================
   2. СБРОС СТИЛЕЙ (RESET & NORMALIZE)
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    height: 100%;
    scrollbar-gutter: stable;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-fallback); /* Будет задействован rgb(254, 254, 254) */
    color: var(--color-dark);
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100%;
}

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-default);
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    transition: var(--transition-default);
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    background: none;
    border: none;
    outline: none;
}

ul,
ol {
    list-style: none;
}

/* Глобальный контейнер */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* Адаптивные отступы для меньших экранов */
@media (max-width: 1200px) {
    :root {
        --container-padding: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 20px;
    }
}

/* ==========================================================================
   3. КНОПКИ И ОБЩИЕ ЭЛЕМЕНТЫ (COMPONENTS)
   ========================================================================== */
/* Кнопка WhatsApp */
.btn-wa {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: 14px 28px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    transition: background-color 0.25s ease, transform 0.2s ease;
}

.btn-wa:hover {
    background-color: var(--color-dark-hover);
    transform: translateY(-1px);
}

.btn-wa:active {
    transform: translateY(1px);
}

.btn-wa__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Основная кнопка CTA */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: 22px 42px;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    transition: background-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
    box-shadow: 0 4px 14px rgba(26, 26, 26, 0.15);
}

.btn-primary:hover {
    background-color: var(--color-dark-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 26, 26, 0.25);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary__icon {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

/* Логотип */
.logo {
    display: flex;
    flex-direction: column;
}

.logo__title {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--color-dark);
    line-height: 1.1;
}

.logo__subtitle {
    font-size: 11px;
    font-weight: 500;
    color: var(--color-muted);
    letter-spacing: 1px;
    margin-top: 2px;
}

/* ==========================================================================
   4. ШАПКА САЙТА (HEADER)
   ========================================================================== */
.header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding-top: 30px;
    padding-bottom: 30px;
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Меню навигации */
.menu__list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.menu__link {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-dark);
    position: relative;
    padding: 6px 0;
}

.menu__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1.5px;
    background-color: var(--color-dark);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.menu__link:hover {
    color: var(--color-dark);
}

.menu__link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Бургер-кнопка */
.burger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    z-index: 110;
}

.burger__line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-dark);
    transition: var(--transition-default);
    border-radius: 2px;
}

.burger.is-active .burger__line:nth-child(1) {
    transform: translateY(9.5px) rotate(45deg);
}

.burger.is-active .burger__line:nth-child(2) {
    opacity: 0;
}

.burger.is-active .burger__line:nth-child(3) {
    transform: translateY(-9.5px) rotate(-45deg);
}

/* ==========================================================================
   5. МОБИЛЬНОЕ МЕНЮ
   ========================================================================== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 95;
    visibility: hidden;
    pointer-events: none;
    transition: visibility 0.4s;
}

.mobile-menu.is-open {
    visibility: visible;
    pointer-events: auto;
}

.mobile-menu__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.mobile-menu.is-open .mobile-menu__backdrop {
    opacity: 1;
}

.mobile-menu__content {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 320px;
    height: 100%;
    background-color: var(--color-white);
    padding: 100px 30px 40px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
}

.mobile-menu.is-open .mobile-menu__content {
    transform: translateX(0);
}

.mobile-menu__list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mobile-menu__link {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-dark);
}

.mobile-menu__whatsapp {
    width: 100%;
    justify-content: center;
}

/* ==========================================================================
   6. ГЛАВНЫЙ ЭКРАН (HERO SECTION)
   ========================================================================== */
.hero {
    position: relative;
    width: 100%;
    min-height: 1080px;
    height: 100vh;
    display: flex;
    align-items: center;
    background-image: url('hero.png');
    background-size: cover;
    background-position: center right;
    background-repeat: no-repeat;
    padding-top: 100px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Сложный градиент с точным позиционированием растворения */
    background: linear-gradient(90deg, 
        rgb(254, 254, 254) 0%, 
        rgb(254, 254, 254) 25%, 
        rgba(254, 254, 254, 0) 50%
    );
    pointer-events: none;
    z-index: 1;
}

.hero__container {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    width: 100%;
}

.hero__content {
    max-width: 650px;
    padding-right: 20px;
}

.hero__title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-dark);
    letter-spacing: -1px;
    margin: 0 0 24px 0;
}

.hero__description {
    font-size: 20px;
    line-height: 1.55;
    color: var(--color-muted);
    max-width: 530px;
    margin: 0 0 45px 0;
}

.hero__actions {
    display: flex;
    align-items: center;
    position: relative;
}

.hero__note {
    display: flex;
    align-items: center;
    position: relative;
    margin-left: 125px;
}

.hero__arrow {
    position: absolute;
    left: -105px;
    top: -15px;
    width: 90px;
    height: 35px;
    flex-shrink: 0;
}

.hero__note-text {
    font-size: 14px;
    line-height: 1.35;
    color: var(--color-dark);
    font-weight: 500;
}

/* ==========================================================================
   7. АДАПТИВНОСТЬ (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 1440px) {
    .hero__title {
        font-size: 54px;
    }
    .hero__description {
        font-size: 18px;
        margin-bottom: 35px;
    }
    .hero {
        min-height: 900px;
    }
}

@media (max-width: 1200px) {
    .menu__list {
        gap: 25px;
    }
}

@media (max-width: 1024px) {
    .header__menu,
    .header__whatsapp {
        display: none;
    }

    .burger {
        display: flex;
    }

    .hero {
        min-height: auto;
        height: auto;
        padding-top: 140px;
        padding-bottom: 80px;
    }

    .hero::before {
        background: rgba(255, 255, 255, 0.85);
    }

    .hero__content {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .header {
        padding-top: 20px;
        padding-bottom: 20px;
    }

    .hero__title {
        font-size: 38px;
    }
    
    .hero__title br {
        display: none;
    }

    .hero__description {
        font-size: 16px;
        margin-bottom: 30px;
    }

    .hero__actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        width: 100%;
    }

    .hero__btn {
        width: 100%;
        padding: 18px 24px;
        font-size: 16px;
    }

    .hero__note {
        padding-left: 10px;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 32px;
    }
    
    .logo__title {
        font-size: 20px;
    }
    
    .logo__subtitle {
        font-size: 9px;
    }
}

/* ==========================================================================
   8. СЕКЦИЯ КАЛЬКУЛЯТОРА СТОИМОСТИ (CALCULATOR SECTION)
   ========================================================================== */
.calculator-section {
    position: relative;
    z-index: 10;
    margin-top: -160px; 
    padding-bottom: 0; /* Убрали лишний отступ (было 120px) */
}

/* Белая карточка всей секции калькулятора */
.calculator-section__card {
    background-color: var(--color-white);
    border-radius: 24px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.06);
    /* Точный внутренний отступ по макету: 82 пикселя со всех сторон */
    padding: 82px;
}

.calculator-section__header {
    margin-bottom: 40px;
}

.calculator-section__title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.calculator-section__subtitle {
    font-size: 16px;
    color: var(--color-muted);
}

/* Шаги в калькуляторе */
.calculator-steps {
    display: flex;
    align-items: center;
    gap: 32px;
    border-bottom: 1px solid #ECECEC;
    padding-bottom: 30px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.calculator-steps__item {
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0.4;
    transition: var(--transition-default);
}

.calculator-steps__item.is-active {
    opacity: 1;
}

.calculator-steps__num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: #EAEAEA;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    color: var(--color-dark);
    transition: var(--transition-default);
}

.calculator-steps__item.is-active .calculator-steps__num {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.calculator-steps__name {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-dark);
}

/* Сетка контента калькулятора */
.calculator-grid {
    display: flex;
    align-items: flex-start;
    gap: 40px;
}

/* ЛЕВАЯ ЧАСТЬ: Блок выбора шага */
.calculator-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 60px;
}

/* Карточка "Что будем считать?" */
.step-card {
    background-color: #F9F9F9;
    border-radius: 16px;
    padding: 48px;
    /* Точные размеры по макету */
    max-width: 1160px;
    height: 700px;
    display: flex;
    flex-direction: column;
}

.step-card__title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.step-card__subtitle {
    font-size: 15px;
    color: var(--color-muted);
    margin-bottom: 40px;
}

/* Сетка выбора изделий */
.products-grid {
    display: flex;
    gap: 24px;
    margin-bottom: auto; /* Прижимает кнопку "Далее" вниз */
}

/* Точный размер ячеек: 237px x 297px */
.product-card {
    width: 237px;
    height: 297px;
    background-color: var(--color-white);
    border: 2px solid #E0E0E0;
    border-radius: 12px;
    padding: 29px 19px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.25s ease, transform 0.2s ease;
}

.product-card:hover {
    border-color: var(--color-dark-hover);
    transform: translateY(-2px);
}

.product-card.is-selected {
    border-color: var(--color-dark);
}

.product-card__icon-wrapper {
    margin-bottom: 30px;
}

.product-card__icon {
    width: 184px;
    height: 120px;
}

.product-card__title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-dark);
}

/* Стрелочная кнопка */
.btn-dark-arrow {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: 18px 36px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    width: fit-content;
    transition: var(--transition-default);
}

.btn-dark-arrow:hover {
    background-color: var(--color-dark-hover);
    transform: translateY(-1px);
}

/* БЛОК "Как мы помогаем определиться с материалом" */
.materials-info__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 30px;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    margin-bottom: 30px;
    min-height: 760px;
}

.materials-info {
    margin-top: 50px;
}

.material-card {
    width: 100%;
    height: 365px;
    background-color: var(--color-white);
    border: 2px solid #ECECEC;
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

@media (max-width: 1600px) {
    .materials-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 1200px) {
    .materials-grid {
        grid-template-columns: repeat(3, 1fr);
        min-height: auto;
    }
}

@media (max-width: 768px) {
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .materials-grid {
        grid-template-columns: 1fr;
    }
}

.material-card:hover {
    border-color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.material-card.is-selected {
    border-color: var(--color-dark);
    background-color: #FAF8F5;
}

.material-card__image-container {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.material-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.material-card__content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.material-card__header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.material-card__icon {
    color: var(--color-dark);
}

.material-card__name {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
}

.material-card__desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.5;
}

/* Примечание */
.materials-info__note {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-muted-light);
    font-size: 14px;
}

.materials-info__note-icon {
    flex-shrink: 0;
}

/* ПРАВАЯ ЧАСТЬ: Боковая панель "Ваш расчет" */
/* Размеры боковой панели по макету: 485px x 970px */
.calculator-sidebar {
    width: 485px;
    flex-shrink: 0;
}

.calc-receipt {
    background-color: #F9F9F9;
    border-radius: 16px;
    padding: 48px;
    /* Уменьшили высоту еще на 5px (итого 805px) */
    height: 805px; 
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

.calc-receipt__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
}

.calc-receipt__title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
}

.calc-receipt__reset-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-muted);
}

.calc-receipt__reset-btn:hover {
    color: var(--color-dark);
}

/* Список расчетов */
.calc-receipt__list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    border-bottom: 1px solid #ECECEC;
    padding-bottom: 30px;
    margin-bottom: 30px;
}

.calc-receipt__item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.calc-receipt__label {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-muted-light);
}

.calc-receipt__val {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-dark);
}

/* Итог */
.calc-receipt__total-wrapper {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 30px;
}

.calc-receipt__total-label {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
}

.calc-receipt__price {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-dark);
}

/* Кнопка отправки */
.calc-receipt__submit {
    width: 100%;
    padding: 20px;
    font-size: 16px;
    border-radius: 10px;
    margin-bottom: 24px;
}

/* Безопасность */
.calc-receipt__security {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--color-muted-light);
    font-size: 14px;
    margin-top: auto;
}

/* ==========================================================================
   9. АДАПТИВНОСТЬ ДЛЯ КАЛЬКУЛЯТОРА
   ========================================================================== */
@media (max-width: 1700px) {
    .calculator-section__card {
        padding: 50px 40px;
    }
    
    .calculator-grid {
        flex-direction: column;
        align-items: stretch;
    }

    .calculator-sidebar {
        width: 100%;
    }

    .calc-receipt {
        height: auto;
    }

    .step-card {
        max-width: 100%;
        height: auto;
    }
}

@media (max-width: 1200px) {
    .products-grid,
    .materials-grid {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .product-card,
    .material-card {
        width: calc(50% - 12px);
    }
}

@media (max-width: 768px) {
    .calculator-steps {
        gap: 16px;
    }

    .calculator-section {
        margin-top: -80px;
    }

    .step-card {
        padding: 24px;
    }

    .product-card {
        width: 100%;
        height: auto;
        padding: 20px;
    }

    .material-card {
        width: 100%;
        height: auto;
    }

    .calculator-section__title {
        font-size: 28px;
    }
}

/* ==========================================================================
   10. СЕКЦИЯ "О НАС" (ABOUT US SECTION)
   ========================================================================== */
.about {
    position: relative;
    width: 100%;
    margin-top: 50px;
    padding-bottom: 0; /* Убрали лишний padding (было 100px) */
}

.about__title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    color: var(--color-dark);
    margin-bottom: 40px;
    letter-spacing: -0.5px;
}

/* Флекс-контейнер для карточек */
.about__grid {
    display: flex;
    justify-content: center;
    align-items: center;
    /* Точный зазор между ячейками */
    gap: 9px;
    width: 100%;
}

/* Карточка преимуществ (Точные размеры: 406px x 192px) */
.about-card {
    width: 406px;
    height: 192px;
    background-color: var(--color-white);
    border: 1px solid #ECECEC;
    border-radius: 12px;
    padding: 30px 35px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-sizing: border-box;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Плавный эффект левитации при наведении */
.about-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

.about-card__icon-wrapper {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-card__icon {
    width: 86px;
    height: 86px;
}

.about-card__content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.about-card__headline {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-dark);
    line-height: 1.2;
}

.about-card__desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.45;
}

/* ==========================================================================
   АДАПТИВНОСТЬ ДЛЯ СЕКЦИИ "О НАС"
   ========================================================================== */
@media (max-width: 1700px) {
    /* На средних десктопах перестраиваем в красивую сетку 2х2 с сохранением размеров */
    .about__grid {
        flex-wrap: wrap;
        max-width: 830px; /* 406px * 2 + 9px */
        margin: 0 auto;
    }
}

@media (max-width: 880px) {
    .about__grid {
        /* Для мобильных и планшетов делаем карточки резиновыми, сохраняя зазор */
        max-width: 100%;
    }
    
    .about-card {
        width: calc(50% - 5px); /* Адаптивный расчет ширины */
    }
}

@media (max-width: 600px) {
    .about__grid {
        flex-direction: column;
        gap: 12px;
    }
    
    .about-card {
        width: 100%;
        height: auto; /* На маленьких экранах высота подстраивается */
        padding: 24px;
        gap: 20px;
    }
    
    .about__title {
        margin-bottom: 30px;
    }
}

/* ==========================================================================
   11. СЕКЦИЯ "ПОРТФОЛИО" (PORTFOLIO SECTION)
   ========================================================================== */
.portfolio {
    position: relative;
    width: 100%;
    /* Ровно 50px от нижнего края карточек преимуществ до начала секции портфолио */
    margin-top: 50px; 
    padding-bottom: 100px;
}

.portfolio__header {
    text-align: center;
    margin-bottom: 45px;
}

.portfolio__title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.portfolio__subtitle {
    font-size: 16px;
    color: var(--color-muted);
}

/* Слайдер портфолио */
.portfolio-slider {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
}

/* Окно просмотра */
.portfolio-slider__viewport {
    width: 100%;
    overflow: hidden;
    padding: 10px 0; /* Чтобы не обрезались тени карточек при наведении */
}

/* Трек, удерживающий карточки */
.portfolio-slider__track {
    display: flex;
    /* Точное расстояние-зазор между слайдами: 44px на десктопе */
    gap: 44px;
    transition: transform 0.45s cubic-bezier(0.25, 1, 0.5, 1);
    will-change: transform;
}

/* Карточка проекта (Точные размеры: 407px x 430px) */
.project-card {
    flex-shrink: 0;
    width: 407px;
    height: 430px;
    background-color: var(--color-white);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #ECECEC;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
    transition: transform 0.3s ease;
    box-shadow: none; /* Полностью убрали тень */
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: none; /* Убрали тень при наведении */
}

/* Высота картинки: 430px - 104px = 326px */
.project-card__image-wrapper {
    width: 100%;
    height: 326px;
    overflow: hidden;
}

.project-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-card__img {
    transform: scale(1.04);
}

/* Высота текстовой плашки: строго 104px по ТЗ */
.project-card__info {
    width: 100%;
    height: 104px;
    padding: 24px;
    background-color: #FAF8F5; /* Очень легкий теплый оттенок */
    border-top: 1px solid #ECECEC;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
}

.project-card__material {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.project-card__desc {
    font-size: 13px;
    color: var(--color-muted);
}

/* Кнопки навигации (кружки с легкой тенью) */
.portfolio-slider__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background-color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-dark);
    z-index: 15;
    cursor: pointer;
    border: 1px solid #ECECEC;
    transition: var(--transition-default);
    box-shadow: none; /* Полностью убрали тень */
}

.portfolio-slider__btn:hover {
    background-color: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-dark);
    box-shadow: none; /* Убрали тень при наведении */
}

/* Выравнивание кнопок со сдвигом наружу/внутрь */
.portfolio-slider__btn--prev {
    left: -24px;
}

.portfolio-slider__btn--next {
    right: -24px;
}

/* ==========================================================================
   КОРРЕКТИРОВКА ТОЧЕК ПАГИНАЦИИ СЛАЙДЕРА
   ========================================================================== */
.portfolio-slider__dots {
    display: flex;
    justify-content: center;
    align-items: center;
    /* Точное расстояние между точками по вашему ТЗ */
    gap: 27px; 
    margin-top: 35px;
}

.portfolio-slider__dot {
    /* Точные размеры по вашему ТЗ */
    width: 23px;
    height: 14px;
    border-radius: 100px; /* Форма пилюли */
    background-color: #E2E2E2; /* Приглушенный серый для неактивных */
    cursor: pointer;
    transition: var(--transition-default);
}

.portfolio-slider__dot.is-active {
    background-color: var(--color-dark); /* Насыщенный темный для активной точки */
    transform: none; /* Убираем масштабирование */
}

/* ==========================================================================
   АДАПТИВНОСТЬ ДЛЯ СЛАЙДЕРА
   ========================================================================== */
@media (max-width: 1750px) {
    /* Если экран меньше контейнера, убираем вылет стрелок за пределы */
    .portfolio-slider__btn--prev { left: 10px; }
    .portfolio-slider__btn--next { right: 10px; }
}

@media (max-width: 1200px) {
    .project-card {
        width: 320px; /* Уменьшаем карточки на средних экранах */
        height: 380px;
    }
    
    .project-card__image-wrapper {
        height: 276px; /* 380px - 104px */
    }
    
    .portfolio-slider__track {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .project-card {
        width: 280px;
        height: 350px;
    }
    
    .project-card__image-wrapper {
        height: 246px; /* 350px - 104px */
    }
}

/* ==========================================================================
   12. СЕКЦИЯ "ОСТАЛИСЬ ВОПРОСЫ?" (QUESTIONS SECTION)
   ========================================================================== */
.questions {
    position: relative;
    width: 100%;
    margin-top: 50px; /* Точный отступ 50px от Портфолио */
    padding-bottom: 100px;
}

.questions__grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    width: 100%;
}

/* ЛЕВАЯ ЧАСТЬ: Информация */
.questions__info {
    /* 80px (отступ контейнера) + 60px = ровно 140px от края экрана по ТЗ */
    padding-left: 60px; 
    max-width: 500px;
}

.questions__title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.questions__subtitle {
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-muted);
    margin-bottom: 40px;
}

/* Список преимуществ */
.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.benefits-list__item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.benefits-list__icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid #ECECEC;
    background-color: var(--color-white);
    color: var(--color-muted-light);
    flex-shrink: 0;
}

.benefits-list__icon {
    width: 22px;
    height: 22px;
}

.benefits-list__text {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-dark);
}

/* ПРАВАЯ ЧАСТЬ: Форма отправки (Точные размеры 1020px x 444px) */
.questions-form {
    width: 1020px;
    height: 444px;
    background-color: var(--color-white);
    border: 1px solid #ECECEC;
    border-radius: 16px;
    padding: 48px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.03);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.questions-form__row {
    display: flex;
    gap: 24px;
}

.questions-form__field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.questions-form__field--file {
    flex: none;
    width: 100%;
}

.questions-form__label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-muted-light);
}

.questions-form__input {
    width: 100%;
    height: 52px;
    background-color: #FAF8F5;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    padding: 0 16px;
    font-size: 15px;
    color: var(--color-dark);
    transition: var(--transition-default);
}

.questions-form__input:focus {
    border-color: var(--color-dark);
    background-color: var(--color-white);
}

/* Стилизация области Drag & Drop */
.file-uploader {
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1.5px dashed #D5D5D5;
    border-radius: 8px;
    padding: 16px 24px;
    background-color: var(--color-white);
    cursor: pointer;
    transition: var(--transition-default);
}

.file-uploader:hover,
.file-uploader.is-dragover {
    border-color: var(--color-dark);
    background-color: #FAF8F5;
}

.file-uploader__input {
    display: none; /* Скрываем дефолтный инпут */
}

.file-uploader__icon {
    color: var(--color-muted-light);
    flex-shrink: 0;
}

.file-uploader__text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.file-uploader__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-dark);
}

.file-uploader__subtitle {
    font-size: 12px;
    color: var(--color-muted-light);
}

/* Подвал формы (Кнопка + Чекбокс) */
.questions-form__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.questions-form__submit {
    height: 52px;
    width: 220px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: none;
    padding: 0;
}

/* Кастомный чекбокс */
.custom-checkbox {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
}

.custom-checkbox__input {
    display: none; /* Скрываем стандартный инпут */
}

.custom-checkbox__box {
    width: 20px;
    height: 20px;
    border: 1.5px solid #D5D5D5;
    border-radius: 4px;
    background-color: var(--color-white);
    display: inline-block;
    position: relative;
    transition: var(--transition-default);
    flex-shrink: 0;
}

.custom-checkbox__input:checked + .custom-checkbox__box {
    background-color: var(--color-dark);
    border-color: var(--color-dark);
}

.custom-checkbox__input:checked + .custom-checkbox__box::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid var(--color-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.custom-checkbox__text {
    font-size: 14px;
    color: var(--color-muted);
}

/* Ошибка валидации */
.questions-form__input.has-error,
.custom-checkbox__input.has-error + .custom-checkbox__box {
    border-color: #E74C3C;
}

/* ==========================================================================
   АДАПТИВНОСТЬ СЕКЦИИ ОБРАТНОЙ СВЯЗИ
   ========================================================================== */
@media (max-width: 1700px) {
    .questions__grid {
        flex-direction: column;
        align-items: stretch;
    }
    
    .questions__info {
        padding-left: 0; /* Убираем лишний отступ на меньших экранах */
        max-width: 100%;
        text-align: center;
    }
    
    .benefits-list {
        align-items: center;
    }

    .questions-form {
        width: 100%;
        height: auto;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .questions-form {
        padding: 24px;
    }
    
    .questions-form__row {
        flex-direction: column;
        gap: 20px;
    }

    .questions-form__footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .questions-form__submit {
        width: 100%;
    }
}

.step-card {
    display: none !important;
    min-height: 660px !important;
    height: 660px !important;
    box-sizing: border-box;
}

.step-card.is-active {
    display: flex !important;
    flex-direction: column !important;
}

@media (max-width: 1024px) {
    .step-card {
        min-height: auto !important;
        height: auto !important;
    }
}

.calc-shapes-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.shape-selector-btn {
    padding: 12px 24px;
    border: 1px solid #ECECEC;
    border-radius: 8px;
    background-color: var(--color-white);
    color: var(--color-dark);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-default);
}

.shape-selector-btn:hover {
    border-color: var(--color-dark);
}

.shape-selector-btn.is-active {
    background-color: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-dark);
}

.calc-dimensions-grid {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.dimension-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: calc(50% - 10px);
}

.dimension-field__label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-muted-light);
}

.dimension-field__input {
    height: 50px;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    padding: 0 16px;
    font-size: 15px;
    background-color: #FAF8F5;
    color: var(--color-dark);
}

.materials-selector-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.material-select-card {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    border: 2px solid #E0E0E0;
    border-radius: 10px;
    cursor: pointer;
    background-color: var(--color-white);
    transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.2s ease;
    overflow: hidden;
}

.material-select-card:hover {
    border-color: var(--color-dark);
}

.material-select-card.is-selected {
    border-color: var(--color-dark);
    background-color: #FAF8F5;
}

.material-select-card__info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
    padding: 20px 0 20px 20px;
}

.material-select-card__title {
    display: block;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-dark);
}

.material-select-card__short {
    display: block;
    font-size: 13px;
    color: var(--color-muted);
    line-height: 1.4;
}

.material-select-card__preview {
    width: 120px;
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    clip-path: polygon(45px 0, 100% 0, 100% 100%, 0 100%);
}

.material-select-card:hover .material-select-card__preview {
    transform: scale(1.05);
}

.material-details-dropdown {
    background-color: #FAF8F5;
    border-left: 3px solid var(--color-dark);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 30px;
    min-height: 80px;
}

.material-details-dropdown__text {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.5;
}

.category-selector-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 30px;
}

.category-select-card {
    border: 2px solid #E0E0E0;
    border-radius: 10px;
    padding: 19px;
    cursor: pointer;
    background-color: var(--color-white);
    transition: border-color 0.25s ease, background-color 0.25s ease;
}

.category-select-card:hover {
    border-color: var(--color-dark);
}

.category-select-card.is-selected {
    border-color: var(--color-dark);
    background-color: #FAF8F5;
}

.category-select-card__title {
    display: block;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-dark);
}

.category-select-card__desc {
    display: block;
    font-size: 13px;
    color: var(--color-muted);
}

.style-selector-grid {
    display: flex;
    gap: 16px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.style-select-card {
    flex: 1;
    min-width: 140px;
    border: 2px solid #E0E0E0;
    border-radius: 10px;
    padding: 23px;
    text-align: center;
    cursor: pointer;
    background-color: var(--color-white);
    transition: border-color 0.25s ease, background-color 0.25s ease;
}

.style-select-card:hover {
    border-color: var(--color-dark);
}

.style-select-card.is-selected {
    border-color: var(--color-dark);
    background-color: #FAF8F5;
}

.style-select-card__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
}

.cutouts-selection-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 30px;
}

.cutout-option-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cutout-option-block__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-dark);
}

.cutouts-radio-grid {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.cutout-radio-label {
    cursor: pointer;
    display: flex;
    align-items: center;
}

.cutout-radio-label input {
    display: none;
}

.cutout-radio-label span {
    display: inline-block;
    padding: 12px 20px;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    background-color: var(--color-white);
    transition: var(--transition-default);
}

.cutout-radio-label input:checked + span {
    background-color: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-dark);
}

.addons-selection-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 30px;
}

.addon-checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.addon-checkbox-input {
    display: none;
}

.addon-checkbox-box {
    width: 20px;
    height: 20px;
    border: 1.5px solid #D5D5D5;
    border-radius: 4px;
    display: inline-block;
    position: relative;
    background-color: var(--color-white);
    transition: var(--transition-default);
}

.addon-checkbox-input:checked + .addon-checkbox-box {
    background-color: var(--color-dark);
    border-color: var(--color-dark);
}

.addon-checkbox-input:checked + .addon-checkbox-box::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid var(--color-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.addon-checkbox-text {
    font-size: 14px;
    color: var(--color-dark);
    font-weight: 500;
}

.step-card__actions {
    display: flex;
    gap: 16px;
    margin-top: auto;
}

.btn-secondary-arrow {
    background-color: transparent !important;
    color: var(--color-dark) !important;
    border: 1px solid var(--color-dark) !important;
}

.btn-secondary-arrow:hover {
    background-color: #FAF8F5 !important;
}

.textures-panel {
    margin-top: 40px;
    border-top: 1px solid #ECECEC;
    padding-top: 30px;
    margin-bottom: 35px;
}

.textures-panel__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 16px;
}

.textures-panel__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 14px;
}

.texture-swatch {
    border: 2px solid #E0E0E0;
    border-radius: 8px;
    padding: 9px;
    text-align: center;
    cursor: pointer;
    background-color: var(--color-white);
    transition: border-color 0.25s ease;
}

.texture-swatch:hover {
    border-color: var(--color-dark);
}

.texture-swatch.is-selected {
    border-color: var(--color-dark);
}

.texture-swatch__preview {
    height: 60px;
    background-color: #ECECEC;
    border-radius: 4px;
    margin-bottom: 8px;
    background-image: linear-gradient(45deg, #F0F0F0 25%, transparent 25%), linear-gradient(-45deg, #F0F0F0 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #F0F0F0 75%), linear-gradient(-45deg, transparent 75%, #F0F0F0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.texture-swatch__name {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.calc-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.calc-modal.is-open {
    display: flex;
}

.calc-modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.calc-modal__content {
    position: relative;
    background-color: var(--color-white);
    width: 100%;
    max-width: 440px;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    z-index: 1010;
}

.calc-modal__close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 24px;
    color: var(--color-muted-light);
    cursor: pointer;
    line-height: 1;
}

.calc-modal__close:hover {
    color: var(--color-dark);
}

.calc-modal__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.calc-modal__subtitle {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.45;
    margin-bottom: 24px;
}

.calc-modal__field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.calc-modal__label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-muted-light);
}

.calc-modal__input {
    height: 50px;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    padding: 0 16px;
    font-size: 15px;
    background-color: #FAF8F5;
    color: var(--color-dark);
}

.calc-modal__input:focus {
    border-color: var(--color-dark);
    background-color: var(--color-white);
}

.calc-modal__submit {
    width: 100%;
    height: 50px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    margin-top: 10px;
}

.calculator-main {
    flex: 1 1 0% !important;
    min-width: 0 !important;
}

.step-card {
    width: 100% !important;
}

.products-grid {
    display: grid !important;
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 16px !important;
    width: 100% !important;
}

.product-card {
    width: 100% !important;
}

@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: 1fr !important;
    }
}

.materials-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-top: 40px;
    margin-bottom: 30px;
}

.materials-pagination__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid #ECECEC;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-dark);
    background-color: var(--color-white);
    transition: var(--transition-default);
}

.materials-pagination__btn:hover {
    border-color: var(--color-dark);
    background-color: #FAF8F5;
}

.materials-pagination__btn.is-active {
    background-color: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-dark);
}