:root {
    --color-primary: #230b03;
    --color-primary-light: #3d1a0a;
    --color-accent: #230b03;
    --color-accent-hover: #4a1a0d;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F5F5F5;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-white: #FFFFFF;
    --font-family: 'Montserrat', sans-serif;
    --transition: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    text-align: center;
    margin-bottom: 50px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: 15px auto 0;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn--primary {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn--primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
}

.btn--outline {
    background: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
}

.btn--outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

.btn--small {
    padding: 10px 20px;
    font-size: 0.875rem;
    background: var(--color-accent);
    color: var(--color-white);
}

.btn--small:hover {
    background: var(--color-accent-hover);
}

.btn--full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-primary);
    z-index: 1000;
    padding: 15px 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    white-space: nowrap;
}

.nav__list {
    display: flex;
    gap: 30px;
}

.nav__link {
    color: var(--color-white);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav__link:hover {
    color: var(--color-accent);
}

.header__contacts {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header__phone {
    color: var(--color-white);
    font-weight: 600;
    white-space: nowrap;
}

.header__phone:hover {
    color: var(--color-accent);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: url('../assets/hero.jpg') center/cover no-repeat;
    padding-top: 80px;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(35, 11, 3, 0.7), rgba(35, 11, 3, 0.6));
}

.hero__content {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    width: 100%;
}

.hero__glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 60px 80px;
    text-align: center;
    max-width: 800px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
}

.hero__actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Advantages - Dark Section */
.advantages {
    padding: 80px 0;
    background: var(--color-primary);
    overflow-x: hidden;
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 30px;
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--color-accent);
}

.advantage-card__number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 10px;
}

.advantage-card__label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

/* Projects - Light Section */
.projects {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.projects .section-title {
    color: var(--color-primary);
}

.projects .section-title::after {
    background: var(--color-accent);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.project-card {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.project-card__img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-card__img {
    transform: scale(1.05);
}

.project-card__info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(35, 11, 3, 0.98) 60%, transparent);
    color: var(--color-white);
    transition: var(--transition);
}

.project-card:hover .project-card__info {
    background: linear-gradient(to top, rgba(35, 11, 3, 0.98) 80%, transparent);
}

.project-card__info h3 {
    font-size: 1.25rem;
    margin-bottom: 5px;
}

.project-card__info p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.project-card__desc {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.5;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
    max-height: 0;
    overflow: hidden;
}

.project-card:hover .project-card__desc {
    opacity: 1;
    transform: translateY(0);
    max-height: 200px;
}

/* Services List */
.services-list {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.services-list .section-title {
    color: var(--color-primary);
    margin-bottom: 50px;
}

.services-list__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

a.service-card {
    display: block;
    text-decoration: none;
    color: inherit;
}

.service-card {
    background: var(--color-white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.service-card__icon {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.service-card__icon svg {
    width: 30px;
    height: 30px;
    color: var(--color-white);
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
}

.service-card__price {
    display: inline-block;
    margin-top: 15px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
}

/* Services - Dark Section */
.services {
    padding: 100px 0;
    background: #230b03;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-bottom: 50px;
}

.material-card {
    position: relative;
    height: 180px;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.material-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.material-card__texture {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.4s ease;
}

.material-card:hover .material-card__texture {
    transform: scale(1.1);
}

.material-card__name {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 15px 30px;
    background: rgba(35, 11, 3, 0.85);
    color: var(--color-white);
    font-size: 1.2rem;
    font-weight: 600;
    z-index: 2;
    border-radius: 8px;
    text-align: center;
    width: 80%;
    transition: background 0.3s ease;
}

.material-card:hover .material-card__name {
    background: rgba(35, 11, 3, 0.95);
}

.material-card__price {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 15px;
    background: rgba(245, 166, 35, 0.95);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 2;
    border-radius: 20px;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.material-card:hover .material-card__price {
    opacity: 1;
    transform: translateX(-50%) translateY(-5px);
}

.services__cta {
    text-align: center;
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.services__cta .btn {
    flex: 1;
    max-width: 250px;
}

.services__cta .btn--primary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-white);
}

.services__cta .btn--primary:hover {
    background: transparent;
    color: var(--color-white);
}

/* Workflow - Light Section */
.workflow {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.workflow .section-title {
    color: var(--color-primary);
}

.workflow .section-title::after {
    background: var(--color-accent);
}

.workflow__steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.workflow-step {
    text-align: center;
    position: relative;
    background: var(--color-white);
    padding: 30px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.workflow-step__num {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    margin-bottom: 10px;
}

.workflow-step h4 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.workflow-step p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* Why Us - Light Section */
.why-us {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.why-us .section-title {
    color: var(--color-primary);
}

.why-us .section-title::after {
    background: var(--color-accent);
}

.why-us__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
}

.why-us__reviews {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.review-card {
    background: var(--color-white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--color-accent);
}

.review-card__text {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 15px;
    font-style: italic;
}

.review-card__author {
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.why-us__partners h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 25px;
}

.partners__logos {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.partners__logos span {
    background: var(--color-white);
    padding: 15px 25px;
    border-radius: 4px;
    font-weight: 600;
    color: var(--color-primary);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

/* Contacts - Dark Gradient */
.contacts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
}

.contacts__map {
    background: #e0e0e0;
}

.contacts__map iframe {
    display: block;
}

.contacts__form-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    padding: 40px;
}

.contacts__form {
    max-width: 400px;
    width: 100%;
}

.contacts__form h2 {
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: 10px;
}

.contacts__form > p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 30px;
}



.contacts__phone {
    margin-top: 25px;
    color: rgba(255, 255, 255, 0.8);
}

.contacts__phone a {
    color: var(--color-white);
    font-weight: 600;
}

.contacts__phone a:hover {
    text-decoration: underline;
}

.contacts__address {
    margin-top: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: var(--color-primary);
    padding: 30px 0;
    border-top: 3px solid var(--color-accent);
}

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

.footer__left {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer .logo {
    font-size: 1.25rem;
}

.footer__copy {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.footer__right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
}

.footer__phone {
    color: var(--color-white);
    font-weight: 600;
}

.footer__phone:hover {
    color: var(--color-accent);
}

.footer__link {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.footer__link:hover {
    color: var(--color-white);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Menu */
.nav.mobile-open {
    display: block;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-primary);
    padding: 20px;
    overflow-y: auto;
}

.nav.mobile-open .nav__list {
    flex-direction: column;
    gap: 0;
    padding-top: 20px;
}

.nav.mobile-open .nav__link {
    display: block;
    padding: 15px 0;
    font-size: 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero__title {
        font-size: 2.5rem;
    }
    
    .hero__glass {
        padding: 40px 50px;
    }
    
    .advantages__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-list__grid {
        grid-template-columns: 1fr;
    }
    
    .workflow__steps {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .workflow-step {
        padding: 25px 15px;
    }
    
    .why-us__content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header__container {
        flex-wrap: wrap;
    }
    
    .nav {
        display: none;
    }
    
    .nav.mobile-open {
        display: block;
    }
    
    .header__contacts .btn--small {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .hero__subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .advantages__grid {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }
    
    .advantage-card {
        padding: 25px 15px;
    }
    
    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .workflow__steps {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .contacts {
        grid-template-columns: 1fr;
    }
    
    .contacts__map {
        min-height: 300px;
    }
    
    .footer__container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer__right {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.75rem;
    }
    
    .hero__glass {
        padding: 30px 20px;
        border-radius: 16px;
    }
    
    .hero__subtitle {
        font-size: 1rem;
    }
    
    .hero__actions {
        flex-direction: column;
    }
    
    .hero__actions .btn {
        width: 100%;
    }
    
    .advantages__grid {
        grid-template-columns: 1fr;
        padding: 0 10px;
    }
    
    .advantage-card {
        padding: 20px 10px;
    }
    
    .advantage-card__number {
        font-size: 1.25rem;
    }
    
    .advantage-card__label {
        font-size: 0.85rem;
    }
    
    .services-list {
        padding: 60px 0;
    }
    
    .services-list__grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 25px;
    }
    
    .service-card h3 {
        font-size: 1.25rem;
    }
    
    .materials-grid {
        grid-template-columns: 1fr;
    }
    
    .materials-grid .btn {
        width: 100%;
    }
    
    .services__cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .services__cta .btn {
        max-width: 100%;
    }
    
    .material-card {
        height: 150px;
    }
    
    .advantage-card {
        padding: 30px 20px;
    }
    
    .projects__grid {
        grid-template-columns: 1fr;
    }
    
    .project-card__img {
        height: 220px;
    }
    
    .workflow__steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners__logos {
        justify-content: center;
    }
}