/* Медиа-запросы для адаптивности */

/* Большие экраны (1920px и выше) */
@media (min-width: 1920px) {
    .fours-container {
        max-width: 1600px;
    }

    .fours-hero-title {
        font-size: 48px;
    }

    .fours-hero-text {
        font-size: 20px;
    }

    .fours-section-title {
        font-size: 48px;
    }
}

/* Планшеты в альбомной ориентации (992px - 1199px) */
@media (max-width: 1199px) and (min-width: 993px) {
    .fours-container {
        padding: 0 30px;
    }

    .fours-hero-title {
        font-size: 38px;
    }

    .fours-hero-text {
        font-size: 17px;
    }

    .fours-section-title {
        font-size: 38px;
    }

    .fours-about-subtitle {
        font-size: 46px;
    }

    .fours-service-text-block {
        padding: 50px;
    }

    .fours-project-item {
        gap: 40px;
    }
}

/* Планшеты (768px - 992px) */
@media (max-width: 992px) and (min-width: 769px) {
    .fours-container {
        padding: 0 25px;
    }

    .fours-hero {
        min-height: 80vh;
    }

    .fours-hero-title {
        font-size: 34px;
    }

    .fours-hero-text {
        font-size: 16px;
    }

    .fours-section-title {
        font-size: 36px;
        margin-bottom: 50px;
    }

    .fours-about {
        padding: 80px 0;
    }

    .fours-about-subtitle {
        font-size: 42px;
        letter-spacing: 6px;
    }

    .fours-text-large {
        font-size: 20px;
    }

    .fours-services {
        padding: 100px 0;
    }

    .fours-service-text-block {
        padding: 40px;
    }

    .fours-service-title {
        font-size: 22px;
    }

    .fours-booklet-container {
        min-height: 650px;
    }

    .fours-booklet-content {
        padding: 45px 35px 100px 35px;
    }

    .fours-projects {
        padding: 100px 0;
    }

    .fours-project-item {
        gap: 35px;
    }

    .fours-project-title {
        font-size: 30px;
    }

    .fours-footer-contacts {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Большие мобильные устройства (576px - 767px) */
@media (max-width: 767px) and (min-width: 577px) {
    .fours-container {
        padding: 0 20px;
    }

    section {
        padding: 60px 0;
    }

    .fours-hero {
        min-height: 70vh;
        padding: 30px 0;
    }

    .fours-hero-title {
        font-size: 30px;
        margin-bottom: 20px;
    }

    .fours-hero-text {
        font-size: 15px;
        line-height: 1.7;
    }

    .fours-hero-content .fours-btn-primary {
        margin-top: 25px;
        padding: 11px 25px;
        font-size: 15px;
    }

    .fours-section-title {
        font-size: 30px;
        margin-bottom: 40px;
    }

    .fours-about {
        padding: 70px 0;
    }

    .fours-about-content {
        gap: 35px;
    }

    .fours-about-subtitle {
        font-size: 36px;
        letter-spacing: 5px;
    }

    .fours-text-large {
        font-size: 17px;
    }

    .fours-about-main p {
        font-size: 15px;
    }

    .fours-about-feature {
        padding: 28px;
    }

    .fours-about-feature-title {
        font-size: 19px;
    }

    .fours-services {
        padding: 70px 0;
    }

    .fours-services-content {
        gap: 40px;
    }

    .fours-service-text-block {
        padding: 30px 25px;
    }

    .fours-service-number {
        font-size: 52px;
    }

    .fours-service-title {
        font-size: 19px;
        margin-bottom: 18px;
    }

    .fours-service-text-block p {
        font-size: 14px;
    }

    .fours-additional-info {
        padding: 70px 0;
    }

    .fours-additional-content p {
        font-size: 16px;
    }

    .fours-advantages {
        padding: 70px 0;
    }

    .fours-booklet-container {
        min-height: 600px;
    }

    .fours-booklet-content {
        padding: 35px 30px 80px 30px;
        overflow-y: auto;
        max-height: calc(100% - 60px);
        -webkit-overflow-scrolling: touch;
    }

    .fours-booklet-content::-webkit-scrollbar {
        width: 4px;
    }

    .fours-booklet-content::-webkit-scrollbar-track {
        background: rgba(255, 255, 255, 0.05);
        border-radius: 2px;
    }

    .fours-booklet-content::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.2);
        border-radius: 2px;
    }

    .fours-booklet-content::-webkit-scrollbar-thumb:hover {
        background: rgba(255, 255, 255, 0.3);
    }

    .fours-booklet-content p {
        font-size: 14px;
        margin-bottom: 12px;
    }

    .fours-projects {
        padding: 70px 0;
    }

    .fours-projects-content {
        gap: 50px;
    }

    .fours-project-item {
        gap: 30px;
    }

    .fours-project-img {
        min-height: 280px;
    }

    .fours-project-text-block {
        padding: 35px;
    }

    .fours-project-title {
        font-size: 26px;
    }

    .fours-project-text-block p {
        font-size: 15px;
    }

    .fours-footer {
        padding: 70px 0 50px;
    }

    .fours-footer-title {
        font-size: 26px;
    }

    .fours-footer-contacts {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .fours-footer-link {
        font-size: 16px;
        padding: 20px;
    }
}

/* Мобильные устройства (480px - 576px) */
@media (max-width: 576px) and (min-width: 481px) {
    .fours-container {
        padding: 0 18px;
    }

    section {
        padding: 50px 0;
    }

    .fours-hero {
        min-height: 65vh;
        padding: 25px 0;
    }

    .fours-hero-title {
        font-size: 28px;
        margin-bottom: 18px;
        line-height: 1.2;
    }

    .fours-hero-text {
        font-size: 14px;
        line-height: 1.6;
    }

    .fours-hero-content .fours-btn-primary {
        margin-top: 20px;
        padding: 10px 22px;
        font-size: 14px;
    }

    .fours-section-title {
        font-size: 28px;
        margin-bottom: 35px;
    }

    .fours-about {
        padding: 60px 0;
    }

    .fours-about-content {
        gap: 30px;
    }

    .fours-about-subtitle {
        font-size: 32px;
        letter-spacing: 4px;
    }

    .fours-text-large {
        font-size: 16px;
    }

    .fours-about-main p {
        font-size: 14px;
    }

    .fours-about-feature {
        padding: 25px;
    }

    .fours-about-feature-title {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .fours-about-feature p {
        font-size: 14px;
    }

    .fours-services {
        padding: 60px 0;
    }

    .fours-services-content {
        gap: 30px;
    }

    .fours-service-text-block {
        padding: 28px 20px;
    }

    .fours-service-number {
        font-size: 45px;
        top: 18px;
        right: 18px;
    }

    .fours-service-title {
        font-size: 18px;
        margin-bottom: 15px;
        padding-left: 12px;
    }

    .fours-service-title::before {
        width: 3px;
        height: 18px;
    }

    .fours-service-text-block p {
        font-size: 13px;
        line-height: 1.6;
    }

    .fours-additional-info {
        padding: 60px 0;
    }

    .fours-additional-content p {
        font-size: 15px;
        line-height: 1.8;
    }

    .fours-advantages {
        padding: 60px 0;
    }

    .fours-advantages .fours-section-title {
        margin-bottom: 35px;
    }

    .fours-booklet-wrapper {
        padding: 15px;
    }

    .fours-booklet-container {
        min-height: 550px;
    }

    .fours-booklet-content {
        padding: 30px 20px 70px 20px;
        overflow-y: auto;
        max-height: calc(100% - 60px);
        -webkit-overflow-scrolling: touch;
    }

    .fours-booklet-content p {
        font-size: 13px;
        line-height: 1.5;
        margin-bottom: 10px;
    }

    .fours-booklet-page-number-left,
    .fours-booklet-page-number-right {
        font-size: 11px;
        padding: 5px 10px;
        min-width: 30px;
    }

    .fours-booklet-page-number-left {
        left: 12px;
    }

    .fours-booklet-page-number-right {
        right: 12px;
    }

    .fours-booklet-page-hint {
        font-size: 10px;
    }

    .fours-projects {
        padding: 60px 0;
    }

    .fours-projects-content {
        gap: 45px;
    }

    .fours-project-item {
        gap: 25px;
    }

    .fours-project-img {
        min-height: 250px;
    }

    .fours-project-text-block {
        padding: 30px;
    }

    .fours-project-title {
        font-size: 24px;
        margin-bottom: 20px;
    }

    .fours-project-text-block p {
        font-size: 14px;
        line-height: 1.7;
    }

    .fours-footer {
        padding: 60px 0 40px;
    }

    .fours-footer-title {
        font-size: 24px;
        margin-bottom: 25px;
    }

    .fours-footer-contacts {
        gap: 15px;
        margin-top: 25px;
    }

    .fours-footer-link {
        font-size: 15px;
        padding: 18px;
        gap: 12px;
    }

    .fours-footer-icon {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }
}

/* Маленькие мобильные устройства (360px - 480px) */
@media (max-width: 480px) {
    .fours-container {
        padding: 0 15px;
    }

    section {
        padding: 45px 0;
    }

    .fours-hero {
        min-height: 60vh;
        padding: 20px 0;
    }

    .fours-hero-title {
        font-size: 24px;
        margin-bottom: 15px;
        line-height: 1.2;
    }

    .fours-hero-text {
        font-size: 13px;
        line-height: 1.6;
    }

    .fours-hero-content .fours-btn-primary {
        margin-top: 18px;
        padding: 9px 20px;
        font-size: 13px;
    }

    .fours-section-title {
        font-size: 24px;
        margin-bottom: 30px;
    }

    .fours-about {
        padding: 50px 0;
    }

    .fours-about-content {
        gap: 25px;
    }

    .fours-about-subtitle {
        font-size: 28px;
        letter-spacing: 3px;
        margin-bottom: 8px;
    }

    .fours-text-large {
        font-size: 15px;
    }

    .fours-about-main p {
        font-size: 13px;
        line-height: 1.7;
    }

    .fours-about-feature {
        padding: 20px;
    }

    .fours-about-feature-title {
        font-size: 17px;
        margin-bottom: 10px;
    }

    .fours-about-feature p {
        font-size: 13px;
        line-height: 1.7;
    }

    .fours-services {
        padding: 50px 0;
    }

    .fours-services-content {
        gap: 25px;
    }

    .fours-service-text-block {
        padding: 25px 18px;
        border-radius: 12px;
    }

    .fours-service-number {
        font-size: 40px;
        top: 15px;
        right: 15px;
    }

    .fours-service-title {
        font-size: 17px;
        margin-bottom: 12px;
        padding-left: 10px;
    }

    .fours-service-title::before {
        width: 2px;
        height: 16px;
    }

    .fours-service-text-block p {
        font-size: 12px;
        line-height: 1.6;
        margin-bottom: 15px;
    }

    .fours-additional-info {
        padding: 50px 0;
    }

    .fours-additional-content p {
        font-size: 14px;
        line-height: 1.7;
    }

    .fours-advantages {
        padding: 50px 0;
    }

    .fours-advantages .fours-section-title {
        margin-bottom: 30px;
    }

    .fours-booklet-wrapper {
        padding: 12px;
    }

    .fours-booklet-container {
        min-height: 500px;
        border-radius: 6px;
    }

    .fours-booklet-content {
        padding: 25px 18px 60px 18px;
        overflow-y: auto;
        max-height: calc(100% - 50px);
        -webkit-overflow-scrolling: touch;
    }

    .fours-booklet-content p {
        font-size: 12px;
        line-height: 1.5;
        margin-bottom: 10px;
    }

    .fours-booklet-page-number-wrapper {
        bottom: 12px;
    }

    .fours-booklet-page-number-left,
    .fours-booklet-page-number-right {
        font-size: 10px;
        padding: 4px 8px;
        min-width: 28px;
    }

    .fours-booklet-page-number-left {
        left: 10px;
    }

    .fours-booklet-page-number-right {
        right: 10px;
    }

    .fours-booklet-page-hint {
        font-size: 9px;
    }

    .fours-projects {
        padding: 50px 0;
    }

    .fours-projects-content {
        gap: 40px;
    }

    .fours-project-item {
        gap: 20px;
    }

    .fours-project-img {
        min-height: 220px;
    }

    .fours-project-text-block {
        padding: 25px;
    }

    .fours-project-title {
        font-size: 22px;
        margin-bottom: 18px;
    }

    .fours-project-text-block p {
        font-size: 13px;
        line-height: 1.7;
    }

    .fours-footer {
        padding: 50px 0 35px;
    }

    .fours-footer-title {
        font-size: 22px;
        margin-bottom: 20px;
        letter-spacing: 0.5px;
    }

    .fours-footer-title::after {
        width: 50px;
        height: 2px;
    }

    .fours-footer-contacts {
        gap: 12px;
        margin-top: 20px;
    }

    .fours-footer-link {
        font-size: 14px;
        padding: 16px;
        gap: 10px;
    }

    .fours-footer-icon {
        width: 38px;
        height: 38px;
        min-width: 38px;
    }

    .fours-footer-text {
        font-size: 13px;
    }
}

/* Очень маленькие мобильные устройства (до 360px) */
@media (max-width: 360px) {
    .fours-container {
        padding: 0 12px;
    }

    section {
        padding: 40px 0;
    }

    .fours-hero {
        min-height: 55vh;
        padding: 18px 0;
    }

    .fours-hero-title {
        font-size: 22px;
        margin-bottom: 12px;
    }

    .fours-hero-text {
        font-size: 12px;
    }

    .fours-hero-content .fours-btn-primary {
        padding: 8px 18px;
        font-size: 12px;
    }

    .fours-section-title {
        font-size: 22px;
        margin-bottom: 25px;
    }

    .fours-about {
        padding: 45px 0;
    }

    .fours-about-subtitle {
        font-size: 24px;
        letter-spacing: 2px;
    }

    .fours-text-large {
        font-size: 14px;
    }

    .fours-about-main p {
        font-size: 12px;
    }

    .fours-about-feature {
        padding: 18px;
    }

    .fours-about-feature-title {
        font-size: 16px;
    }

    .fours-about-feature p {
        font-size: 12px;
    }

    .fours-services {
        padding: 45px 0;
    }

    .fours-service-text-block {
        padding: 22px 15px;
    }

    .fours-service-number {
        font-size: 35px;
    }

    .fours-service-title {
        font-size: 16px;
    }

    .fours-service-text-block p {
        font-size: 11px;
    }

    .fours-additional-content p {
        font-size: 13px;
    }

    .fours-advantages {
        padding: 45px 0;
    }

    .fours-booklet-container {
        min-height: 450px;
    }

    .fours-booklet-content {
        padding: 22px 15px 55px 15px;
        overflow-y: auto;
        max-height: calc(100% - 50px);
        -webkit-overflow-scrolling: touch;
    }

    .fours-booklet-content p {
        font-size: 11px;
        margin-bottom: 8px;
    }

    .fours-projects {
        padding: 45px 0;
    }

    .fours-project-img {
        min-height: 200px;
    }

    .fours-project-text-block {
        padding: 22px;
    }

    .fours-project-title {
        font-size: 20px;
    }

    .fours-project-text-block p {
        font-size: 12px;
    }

    .fours-footer {
        padding: 45px 0 30px;
    }

    .fours-footer-title {
        font-size: 20px;
    }

    .fours-footer-link {
        font-size: 13px;
        padding: 14px;
    }

    .fours-footer-icon {
        width: 35px;
        height: 35px;
        min-width: 35px;
    }
}

/* Ландшафтная ориентация для мобильных устройств */
@media (max-width: 767px) and (orientation: landscape) {
    .fours-hero {
        min-height: 100vh;
    }

    .fours-hero-title {
        font-size: 26px;
    }

    .fours-hero-text {
        font-size: 14px;
    }

    .fours-booklet-container {
        min-height: 400px;
    }
}

/* Высокая плотность пикселей (Retina дисплеи) */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {
    .fours-hero {
        background-size: cover;
    }

    .fours-project-img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Печать */
@media print {

    .fours-hero,
    .fours-footer {
        display: none;
    }

    section {
        page-break-inside: avoid;
        padding: 20px 0;
    }

    .fours-section-title {
        page-break-after: avoid;
    }
}