/* ===== Responsive (media queries) ===== */
@media (max-width: 1200px) {
    .header__inner {
        column-gap: 48px;
    }
    .header__left {
        gap: 16px;
    }
    .header__right {
        gap: 22px;
    }
    .nav__list {
        gap: 32px;
    }
}

@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    .header__inner {
        column-gap: 32px;
    }
    .header__title {
        display: none;
    }
    .header__schedule {
        display: none;
    }
    .nav__list {
        gap: 20px;
    }
    .nav__link {
        font-size: 12px;
        letter-spacing: 0.08em;
    }
}

@media (max-width: 960px) {
    .features,
    .foundation,
    .coating,
    .walls,
    .floors,
    .ushp,
    .construction,
    .pricing,
    .cta-split,
    .callback {
        padding: 48px 0;
    }
    .features__grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .features__image {
        order: -1;
        max-width: 520px;
        margin: 0 auto;
        aspect-ratio: 16 / 11;
    }
    .features__description {
        margin-bottom: 40px;
    }
    .foundation__grid {
        grid-template-columns: 1fr;
        max-width: 520px;
        margin: 0 auto;
        gap: 20px;
    }
    .found-card {
        aspect-ratio: 16 / 9;
    }
    .coating__compare {
        grid-template-columns: 1fr;
    }
    .coating__column {
        padding: 28px 28px;
    }
    .coating__column + .coating__column {
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .walls__grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .floors__grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .ushp__layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .ushp__image {
        max-height: 360px;
    }
    .construction__pattern {
        width: 32px;
        background-size: 32px auto;
    }
    .construction__layout {
        grid-template-columns: 25% 1fr 25%;
        column-gap: 6px;
        row-gap: 0;
        padding: 0 28px;
        align-items: center;
    }
    .construction__list {
        display: flex;
        flex-direction: column;
        gap: 8px;
        margin: 0;
        min-width: 0;
    }
    .construction__list--left {
        margin-left: 0;
        grid-column: 1;
        grid-row: 1;
    }
    .construction__list--right {
        margin-right: 0;
        grid-column: 3;
        grid-row: 1;
    }
    .construction__image {
        grid-column: 2;
        grid-row: 1;
        order: 0;
        max-width: 100%;
        width: 100%;
        margin: 0;
        align-self: center;
    }
    .con-card {
        aspect-ratio: auto;
        min-height: auto;
        padding: 8px 10px;
    }
    .con-card__num {
        font-size: 13px;
    }
    .con-card__title {
        font-size: 11px;
        line-height: 1.2;
    }
    .con-card__text {
        font-size: 10px;
        line-height: 1.2;
    }
    .con-marker {
        width: 26px;
        height: 26px;
        font-size: 12px;
    }
    .pricing__grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
        gap: 24px;
    }
    .cta-split__inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .cta-split__image {
        aspect-ratio: 16 / 10;
        max-width: 560px;
        margin: 0 auto;
        width: 100%;
    }
    .cta-split--reverse .cta-split__image {
        order: 0;
    }
    .callback__inner {
        grid-template-columns: 1fr;
        gap: 28px;
        margin-left: 0;
        max-width: 100%;
    }
    .footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }
    .footer__col--brand {
        grid-column: 1 / -1;
    }
    .footer__col--catalog {
        grid-column: 1 / -1;
        align-self: start;
    }
    .footer__col--contacts {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header__inner {
        grid-template-columns: auto 1fr auto;
        column-gap: 12px;
        row-gap: 0;
        padding-top: 24px;
        padding-bottom: 20px;
        align-items: center;
    }
    .header__burger {
        display: flex;
        grid-column: 1;
        justify-self: start;
    }
    .header__left {
        grid-column: 2;
        justify-self: center;
        flex-direction: column;
        align-items: center;
        gap: 0;
    }
    .header__title {
        display: none;
    }
    .header__catalog {
        display: none;
    }
    .header__right {
        grid-column: 3;
        justify-self: end;
        flex-direction: row;
        align-items: center;
        gap: 8px;
    }
    .header__schedule,
    .header__contact {
        display: none;
    }
    .header__logo img {
        height: 74px;
    }
    .header.header--scrolled {
        background: rgba(15, 8, 7, 0.72);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
    }
    .header__socials {
        gap: 8px;
    }
    .social {
        width: 46px;
        height: 46px;
        border-radius: 6px;
    }
    .social img {
        width: 20px;
        height: 20px;
    }
    .nav {
        display: none;
    }
    .nav-mobile {
        display: block;
    }
    .hero__actions .btn--outline {
        display: none;
    }
    .hero__cta {
        border-radius: 999px;
        padding: 17px 28px;
        font-size: 14px;
    }
    .hero {
        min-height: 540px;
        height: 540px;
        padding-top: 176px;
    }
    .hero__content {
        padding: 48px 40px 32px;
        min-height: 0;
        text-align: left;
        align-items: flex-start;
        justify-content: flex-start;
    }
    .hero__subtitle {
        margin-bottom: 28px;
    }
    .hero__title {
        font-size: 34px;
        line-height: 1.18;
        max-width: 320px;
        margin-bottom: 24px;
    }
    .hero__subtitle {
        font-size: 18px;
        line-height: 1.28;
        max-width: 320px;
        margin-bottom: 34px;
    }
    .hero__logo {
        display: none;
    }
    .hero__actions {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        align-items: flex-start;
    }
    .btn--lg {
        width: 100%;
        padding: 17px 24px;
    }
    .hero__actions .btn--outline {
        display: none;
    }
    .features,
    .foundation,
    .coating,
    .walls,
    .floors,
    .ushp,
    .construction,
    .pricing,
    .cta-split,
    .callback {
        padding: 36px 0;
    }
    .features__title,
    .section-title {
        font-size: 26px;
        line-height: 1.1;
        text-align: left;
    }
    .features__description,
    .section-description {
        font-size: 17px;
        line-height: 1.5;
        text-align: left;
    }
    .features__grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 12px;
        padding: 0;
    }
    .features__list {
        display: contents;
        padding-left: 0;
    }
    .feature-card {
        padding: 20px 18px;
        border-radius: 18px;
        min-height: 0;
        min-width: 0;
    }
    .feature-card__title {
        font-size: 17px;
        letter-spacing: 0.04em;
        line-height: 1.3;
        margin-bottom: 12px;
    }
    .feature-card__text {
        font-size: 15px;
        line-height: 1.5;
    }
    .features__image {
        border-radius: 18px;
        width: 100%;
        height: auto;
        min-height: 0;
        min-width: 0;
        align-self: start;
        aspect-ratio: 1 / 1;
        order: 0;
        max-width: none;
        margin: 0;
        grid-column: 2;
        grid-row: 2;
    }
    .features__image img {
        border-radius: 18px;
    }
    .foundation__grid {
        gap: 14px;
    }
    .found-card {
        aspect-ratio: 16 / 9;
        border-radius: 12px;
    }
    .found-card__content {
        padding: 16px 18px;
        align-items: flex-start;
        justify-content: flex-start;
        gap: 12px;
        text-align: left;
    }
    .found-card__title {
        font-size: 13px;
        letter-spacing: 0.18em;
        background: rgba(158, 10, 36, 0.95);
        padding: 6px 14px;
        border-radius: 4px;
        text-shadow: none;
        display: inline-block;
    }
    .found-card__text {
        font-size: 15px;
        line-height: 1.5;
        text-align: left;
        max-width: none;
    }
    .coating__compare {
        gap: 12px;
        border-radius: 12px;
        overflow: hidden;
    }
    .coating__column {
        padding: 22px 20px;
        background: rgba(255, 255, 255, 0.06);
        border-radius: 12px;
    }
    .coating__column + .coating__column {
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .coating__column-title {
        font-size: 17px;
        letter-spacing: 0.04em;
        text-transform: none;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .coating__column-subtitle {
        font-size: 15px;
        color: rgba(255, 255, 255, 0.75);
    }
    .coating__lead {
        font-size: 15px;
        line-height: 1.5;
    }
    .coating__list li {
        font-size: 15px;
        line-height: 1.5;
        padding-left: 20px;
    }
    .coating__life {
        font-size: 15px;
    }
    .coating__notice {
        flex-direction: row;
        align-items: center;
        gap: 14px;
        padding: 18px 20px;
        border-radius: 14px;
    }
    .coating__notice-icon {
        width: 36px;
        height: 36px;
        font-size: 20px;
        border-radius: 50%;
        border: 1.5px solid var(--color-white);
        flex-shrink: 0;
    }
    .coating__notice-text {
        font-size: 15px;
        line-height: 1.45;
    }
    .walls__grid {
        gap: 14px;
    }
    .wall-card {
        padding: 22px 20px;
        border-radius: 14px;
        background: rgba(0, 0, 0, 0.78);
    }
    .wall-card__title {
        font-size: 17px;
        letter-spacing: 0.04em;
        text-transform: none;
        font-weight: 700;
        margin-bottom: 14px;
    }
    .wall-card__text {
        font-size: 15px;
        line-height: 1.5;
    }
    .floors__grid {
        gap: 14px;
    }
    .floor-card {
        border-radius: 14px;
        overflow: hidden;
    }
    .floor-card__content {
        padding: 20px 18px;
        background: linear-gradient(180deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.75) 100%);
    }
    .floor-card__title {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 10px;
    }
    .floor-card__text {
        font-size: 15px;
        line-height: 1.5;
    }
    .floor-card__list li {
        font-size: 15px;
        line-height: 1.5;
    }
    .ushp__layout {
        gap: 16px;
        padding: 0;
    }
    .ushp__image {
        order: -1;
        max-height: 240px;
        border-radius: 12px;
    }
    .ushp__title {
        font-size: 26px;
        line-height: 1.1;
        text-align: left;
    }
    .ushp__badge {
        align-self: flex-start;
        font-size: 12px;
        padding: 8px 16px;
        letter-spacing: 0.05em;
        gap: 8px;
    }
    .ushp__badge-icon {
        width: 14px;
        height: 14px;
    }
    .ushp__description {
        font-size: 17px;
        line-height: 1.5;
        text-align: left;
    }
    .ushp__items {
        gap: 12px;
    }
    .ushp-item {
        padding: 18px 18px;
        border-radius: 12px;
        background: rgba(0, 0, 0, 0.28);
    }
    .ushp-item__title {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 10px;
    }
    .ushp-item__icon {
        width: 28px;
        height: 28px;
    }
    .ushp-item__text {
        font-size: 15px;
        line-height: 1.5;
    }
    .ushp__notice {
        flex-direction: row;
        align-items: center;
        gap: 14px;
        padding: 16px 18px;
        margin: 24px 0 0;
        border-radius: 16px;
    }
    .ushp__notice-icon {
        width: 36px;
        height: 36px;
        font-size: 20px;
        border-radius: 50%;
        border: 1.5px solid var(--color-white);
        flex-shrink: 0;
    }
    .ushp__notice-text {
        font-size: 15px;
        line-height: 1.5;
    }
    .construction__layout {
        display: grid;
        grid-template-columns: 25% 1fr 25%;
        column-gap: 4px;
        row-gap: 0;
        padding: 0 24px;
        align-items: center;
    }
    .construction__list {
        display: flex;
        flex-direction: column;
        gap: 6px;
        margin: 0;
        min-width: 0;
    }
    .construction__list--left {
        margin-left: 0;
        grid-column: 1;
        grid-row: 1;
        order: 0;
    }
    .construction__image {
        position: relative;
        width: 100%;
        max-width: 100%;
        margin: 0;
        grid-column: 2;
        grid-row: 1;
        order: 0;
        transform: none;
        align-self: center;
    }
    .construction__list--right {
        margin-right: 0;
        grid-column: 3;
        grid-row: 1;
        order: 0;
    }
    .construction__image img {
        width: 100%;
        height: auto;
    }
    .con-marker {
        width: 12px;
        height: 12px;
        font-size: 7px;
        border-width: 1px;
    }
    .construction__pattern {
        display: block;
        width: 22px;
        background-size: 22px auto;
    }
    .con-card {
        min-height: auto;
        padding: 6px 6px;
        aspect-ratio: auto;
    }
    .con-card__num {
        font-size: 11px;
        padding-bottom: 2px;
        margin-bottom: 3px;
    }
    .con-card__num::before {
        width: 16px;
        height: 1px;
    }
    .con-card__title {
        font-size: 9px;
        line-height: 1.15;
    }
    .con-card__text {
        font-size: 8px;
        line-height: 1.15;
    }
    .pricing__grid {
        max-width: 320px;
        gap: 18px;
    }
    .price-card {
        padding: 20px 18px 0;
    }
    .price-card__caption {
        font-size: 11px;
        letter-spacing: 0.12em;
    }
    .price-card__diameter {
        font-size: 17px;
        margin-bottom: 18px;
    }
    .price-card__image {
        min-height: 160px;
    }
    .price-card__image img {
        max-height: 180px;
    }
    .price-card__specs {
        padding-top: 14px;
    }
    .price-card__spec-label {
        font-size: 11px;
    }
    .price-card__spec-value {
        font-size: 15px;
    }
    .price-card__price {
        font-size: 22px;
        margin: 10px 0 16px;
    }
    .price-card__btn {
        padding: 14px 16px;
        font-size: 13px;
    }
    .cta-split__inner {
        display: grid;
        grid-template-columns: 44% 1fr;
        column-gap: 16px;
        row-gap: 0;
        align-items: start;
        gap: 0 16px;
    }
    .cta-split--reverse .cta-split__inner {
        grid-template-columns: 1fr 44%;
    }
    .cta-split__image {
        grid-column: 2;
        grid-row: 1;
        width: 100%;
        max-width: 100%;
        aspect-ratio: 1 / 1;
        max-height: none;
        margin: 0;
        align-self: start;
        justify-self: stretch;
        border-radius: 0;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
        order: 0;
    }
    .cta-split--reverse .cta-split__image {
        grid-column: 1;
        grid-row: 1;
    }
    .cta-split__content {
        display: contents;
    }
    .cta-split__title {
        grid-column: 1;
        grid-row: 1;
        align-self: start;
        font-size: 22px;
        line-height: 1.15;
        margin: 0;
        padding: 0;
    }
    .cta-split--reverse .cta-split__title {
        grid-column: 2;
    }
    .cta-split__content > :not(.cta-split__title) {
        grid-column: 1 / -1;
        margin-top: 14px;
    }
    .cta-split__content p {
        font-size: 15px;
        line-height: 1.5;
    }
    .cta-split__list {
        margin: 8px 0 0;
    }
    .cta-split__list li {
        font-size: 15px;
        line-height: 1.5;
    }
    .cta-split__subtitle {
        font-size: 17px;
        font-weight: 700;
        margin-top: 16px;
    }
    .cta-split__content .btn-arrow,
    .cta-split__content .btn {
        display: flex;
        margin-top: 24px;
        width: 100%;
        justify-content: space-between;
        align-items: center;
        background: #000;
        color: var(--color-white);
        padding: 18px 24px;
        font-size: 13px;
        letter-spacing: 0.16em;
        border-radius: 0;
    }
    .cta-split--light .cta-split__content .btn-arrow,
    .cta-split--light .cta-split__content .btn {
        background: #000;
        color: var(--color-white);
    }
    .callback {
        padding: 40px 0 32px;
    }
    .callback__inner {
        margin-left: 0;
        max-width: 100%;
        gap: 22px;
    }
    .callback__head {
        gap: 14px;
    }
    .callback__title {
        font-size: 30px;
        line-height: 1.05;
    }
    .callback__text {
        font-size: 15px;
        line-height: 1.5;
        max-width: 320px;
    }
    .callback__form {
        gap: 14px;
    }
    .callback__fields {
        grid-template-columns: 1fr;
        gap: 14px;
        margin-bottom: 6px;
    }
    .callback__field {
        padding: 0 16px;
        border-radius: 6px;
    }
    .callback__input {
        font-size: 16px;
        padding: 18px 0;
    }
    .callback__input::placeholder {
        font-size: 15px;
    }
    .callback__field-icon {
        width: 18px;
        height: 18px;
        margin-right: 12px;
    }
    .callback__submit {
        padding: 20px 24px;
        font-size: 15px;
        letter-spacing: 0.14em;
        border-radius: 6px;
        margin-top: 4px;
    }
    .callback__agree {
        margin-top: 10px;
        font-size: 12px;
        line-height: 1.4;
        align-items: flex-start;
    }
    .footer {
        padding-top: 40px;
    }
    .footer__inner {
        display: grid;
        grid-template-columns: 1fr 1fr;
        column-gap: 18px;
        row-gap: 14px;
        padding-bottom: 24px;
    }
    .footer__line {
        display: block;
        height: 28px;
    }
    .footer__col--nav {
        grid-column: span 1;
        order: 1;
        gap: 0;
    }
    .footer__nav {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .footer__nav li {
        text-align: center;
        padding-bottom: 6px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.45);
    }
    .footer__nav a {
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.08em;
        white-space: nowrap;
        display: inline-block;
    }
    /* Catalog button - full width, after nav */
    .footer__col--catalog {
        grid-column: 1 / -1;
        align-items: stretch;
        order: 2;
        margin-top: 12px;
    }
    .footer__catalog {
        width: 100%;
    }
    /* Brand info - full width, after catalog */
    .footer__col--brand {
        grid-column: 1 / -1;
        order: 3;
        margin-top: 4px;
    }
    .footer__company {
        font-size: 14px;
    }
    .footer__info {
        font-size: 13px;
        line-height: 1.5;
    }
    /* Contacts - full width, after brand */
    .footer__col--contacts {
        grid-column: 1 / -1;
        order: 4;
        gap: 14px;
    }
    .footer__schedule {
        font-size: 13px;
    }
    .footer__phone {
        font-size: 22px;
    }
    .footer__mail {
        text-decoration: underline;
        font-size: 13px;
    }
    .footer__bottom-inner {
        flex-direction: row;
        gap: 12px;
        text-align: left;
        justify-content: space-between;
        flex-wrap: wrap;
        font-size: 11px;
    }
    .footer__bottom-inner a {
        text-decoration: underline;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    .header__inner {
        column-gap: 8px;
        padding-top: 24px;
        padding-bottom: 20px;
    }
    .header__logo img {
        height: 74px;
    }
    .header__catalog {
        padding: 7px 14px;
        font-size: 10px;
        letter-spacing: 0.08em;
    }
    .header__phone {
        font-size: 13px;
    }
    .header__callback {
        font-size: 10px;
    }
    .nav__link {
        font-size: 9px;
    }
    .hero__title {
        font-size: 34px;
    }
    .hero__subtitle {
        font-size: 18px;
    }
    .hero__content {
        padding: 48px 40px 32px;
    }
    .features__title,
    .section-title,
    .ushp__title {
        font-size: 24px;
    }
    .callback__title {
        font-size: 28px;
    }
    .cta-split__title {
        font-size: 20px;
    }
    .callback__inner {
        margin-left: 0;
    }
    .footer__info--addr {
        font-size: 11px;
        line-height: 1.45;
    }
}