/* ===== СБРОС СТИЛЕЙ И БАЗОВЫЕ НАСТРОЙКИ ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c5f2d;
    --primary-dark: #1e421f;
    --primary-light: #4a7c4b;
    --secondary-color: #8b4513;
    --secondary-dark: #6b3410;
    --accent-color: #d4a574;
    --text-dark: #2c2c2c;
    --text-medium: #555555;
    --text-light: #777777;
    --bg-light: #f8f8f8;
    --bg-white: #ffffff;
    --bg-dark: #1a1a1a;
    --border-color: #e0e0e0;
    --shadow: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.8rem; }
h4 { font-size: 1.4rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-medium);
}

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

a:hover {
    color: var(--primary-dark);
}

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

/* ===== КНОПКИ ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.5;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

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

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

.btn-calculate {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    font-size: 1.1rem;
    padding: 16px 40px;
    width: 100%;
    margin-top: 1rem;
}

.btn-calculate:hover {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary-color));
}

.btn-small {
    padding: 10px 24px;
    font-size: 0.9rem;
}

.btn-large {
    padding: 18px 48px;
    font-size: 1.2rem;
}

/* ===== СЕКЦИИ ===== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.section-description {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.05rem;
}

section {
    padding: 80px 0;
}

/* ===== ШАПКА ===== */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 2px solid var(--border-color);
}

.logo h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.2rem;
}

.logo p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0;
}

.header-contacts {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.contact-item i {
    font-size: 1.3rem;
}

.contact-item a {
    color: var(--text-dark);
    font-weight: 600;
}

.contact-item a:hover {
    color: var(--primary-color);
}

.contact-item span {
    color: var(--text-medium);
}

/* ===== НАВИГАЦИЯ ===== */
.navigation {
    padding: 15px 0;
}

.navigation ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    list-style: none;
}

.navigation a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    transition: var(--transition);
}

.navigation a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

/* ===== ГЛАВНЫЙ ЭКРАН ===== */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 120px 0;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44,95,45,0.9), rgba(139,69,19,0.85));
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero > p {
    font-size: 1.3rem;
    color: rgba(255,255,255,0.95);
    margin-bottom: 2rem;
}

.hero-benefits {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.benefit-item {
    text-align: center;
}

.benefit-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.benefit-text {
    font-size: 1rem;
    color: rgba(255,255,255,0.9);
}

.hero-prices {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.price-item {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 15px 25px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    border: 2px solid rgba(255,255,255,0.3);
}

.price-label {
    display: block;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 0.3rem;
}

.price-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== КАЛЬКУЛЯТОР ===== */
.calculator-section {
    background: var(--bg-light);
}

.calculator-wrapper {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.calculator-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.form-section h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44,95,45,0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

.checkbox-group label {
    margin: 0;
    font-weight: 400;
}

.consent-group {
    margin: 1.5rem 0;
}

.consent-group label {
    font-size: 0.9rem;
    line-height: 1.5;
}

.consent-group a {
    text-decoration: underline;
}

.form-note {
    background: #fff9e6;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--accent-color);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.form-benefit {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: center;
    line-height: 1.8;
}

/* ===== УСЛУГИ ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.service-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-card p {
    margin-bottom: 1rem;
}

.service-card ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.service-card ul li {
    margin-bottom: 0.5rem;
    color: var(--text-medium);
}

.service-price {
    background: #f0f8f0;
    padding: 12px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    color: var(--primary-color);
    font-size: 1.1rem;
    margin: 1rem 0;
}

.service-price strong {
    font-size: 1.3rem;
}

.service-card .btn {
    margin-top: 1rem;
}

.service-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
}

.service-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.service-cta p {
    color: rgba(255,255,255,0.95);
    margin-bottom: 1.5rem;
}

.cta-benefits {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.cta-benefit {
    font-weight: 600;
}

/* ===== МАТЕРИАЛЫ ===== */
.materials-section {
    background: var(--bg-light);
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.material-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.material-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.material-image {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.material-placeholder {
    font-size: 5rem;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.material-card h3 {
    color: var(--primary-color);
    padding: 20px 20px 10px;
}

.material-description {
    padding: 0 20px;
    margin-bottom: 1rem;
}

.material-advantages {
    padding: 0 20px;
    margin-bottom: 1.5rem;
}

.material-advantages h4 {
    margin-bottom: 0.5rem;
}

.material-advantages ul {
    padding-left: 1.5rem;
}

.material-advantages ul li {
    margin-bottom: 0.5rem;
    color: var(--text-medium);
}

.material-specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    padding: 0 20px;
    margin-bottom: 1rem;
    background: var(--bg-light);
    padding: 15px 20px;
}

.spec-item {
    display: flex;
    flex-direction: column;
}

.spec-label {
    font-size: 0.85rem;
    color: var(--text-light);
}

.spec-value {
    font-weight: 600;
    color: var(--text-dark);
}

.material-price {
    padding: 15px 20px;
    background: #f0f8f0;
    font-size: 1.2rem;
    text-align: center;
    color: var(--primary-color);
}

.material-price strong {
    font-size: 1.5rem;
}

/* ===== ПОРТФОЛИО ===== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.portfolio-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.portfolio-image {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-placeholder {
    display: none;
}

.portfolio-item h3 {
    padding: 20px 20px 10px;
    color: var(--primary-color);
}

.portfolio-desc {
    padding: 0 20px;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.portfolio-details {
    padding: 15px 20px;
    background: var(--bg-light);
    font-size: 0.9rem;
    line-height: 1.8;
}

.portfolio-cta {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    padding: 50px;
    border-radius: var(--border-radius);
    text-align: center;
}

.portfolio-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.portfolio-cta p {
    color: rgba(255,255,255,0.95);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* ===== ОТЗЫВЫ ===== */
.reviews-section {
    background: var(--bg-light);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.review-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: var(--shadow-hover);
}

.review-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.review-header img {
    border-radius: 50%;
    object-fit: cover;
}

.review-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
}

.review-info h4 {
    margin-bottom: 0.3rem;
}

.review-date {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.3rem;
}

.review-rating {
    font-size: 1.2rem;
}

.review-content p {
    font-style: italic;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.review-project {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-medium);
}

/* ===== ПРОИЗВОДСТВО ===== */
.production-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.production-text h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.production-text h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.production-list {
    padding-left: 0;
    list-style: none;
    margin-bottom: 1.5rem;
}

.production-list li {
    padding: 0.5rem 0;
    font-size: 1.05rem;
}

.production-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.gallery-item {
    height: 150px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: white;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

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

.gallery-item:hover img {
    transform: scale(1.05);
}

.production-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    background: white;
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-medium);
    font-size: 1rem;
}

/* ===== КАК ЗАКАЗАТЬ ===== */
.how-to-order-section {
    background: var(--bg-light);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.step-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: relative;
    transition: var(--transition);
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.step-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.step-result {
    margin-top: 1rem;
    padding: 0.8rem;
    background: #f0f8f0;
    border-radius: var(--border-radius-sm);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.order-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 60px;
    border-radius: var(--border-radius);
    text-align: center;
}

.order-cta h3 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.order-cta p {
    color: rgba(255,255,255,0.95);
    margin-bottom: 2rem;
    font-size: 1.2rem;
}

/* ===== СЕРТИФИКАТЫ ===== */
.certificates-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.contract-list,
.guarantees-list {
    list-style: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

.contract-list li,
.guarantees-list li {
    padding: 0.7rem 0;
    font-size: 1.05rem;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.certificate-item {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.certificate-item img {
    width: 100%;
    height: auto;
    display: block;
}

.certificate-item:hover {
    box-shadow: var(--shadow-hover);
}

.certificate-placeholder {
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    color: white;
    padding: 60px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
}

.certificate-title {
    padding: 15px;
    font-weight: 600;
    color: var(--text-dark);
}

.certificates-note {
    background: #fff9e6;
    padding: 20px;
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--accent-color);
}

/* ===== ФИНАЛЬНЫЙ ПРИЗЫВ ===== */
.final-cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.final-cta {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.final-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.final-cta p {
    color: rgba(255,255,255,0.95);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-benefits-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.cta-benefit-item {
    font-weight: 600;
    font-size: 1.1rem;
}

/* ===== КОНТАКТЫ ===== */
.contacts-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
}

.contacts-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-block {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.contact-block h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-block p {
    margin-bottom: 0.5rem;
}

.phone-link,
.email-link {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.contact-note {
    font-size: 0.9rem;
    color: var(--text-light);
}

.contacts-map {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-placeholder {
    text-align: center;
    color: var(--text-light);
}

.map-placeholder p:first-child {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.map-placeholder p:last-child {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ===== ПОДВАЛ ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-left h3 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.footer-left p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 0.3rem;
}

.footer-copyright {
    margin-top: 1rem;
    font-size: 0.9rem;
}

.footer-center h4,
.footer-right h4 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-center p,
.footer-right p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 0.5rem;
}

.footer-right a {
    color: rgba(255,255,255,0.7);
}

.footer-right a:hover {
    color: var(--accent-color);
}

.footer-link {
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

/* ===== КНОПКА НАВЕРХ ===== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* ===== АДАПТИВНОСТЬ ===== */
@media (max-width: 992px) {
    .calculator-form {
        grid-template-columns: 1fr;
    }
    
    .production-content {
        grid-template-columns: 1fr;
    }
    
    .certificates-content {
        grid-template-columns: 1fr;
    }
    
    .contacts-content {
        grid-template-columns: 1fr;
    }
    
    .header-top {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .header-contacts {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.5rem; }
    
    .hero h1 { font-size: 2.2rem; }
    .hero h2 { font-size: 1.8rem; }
    
    .hero-benefits {
        gap: 1.5rem;
    }
    
    .benefit-number {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .navigation ul {
        gap: 0.8rem;
    }
    
    .navigation a {
        font-size: 0.9rem;
        padding: 6px 10px;
    }
    
    .cta-benefits,
    .cta-benefits-grid {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .calculator-wrapper {
        padding: 25px;
    }
    
    .service-cta,
    .portfolio-cta,
    .order-cta,
    .final-cta {
        padding: 40px 25px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    section {
        padding: 50px 0;
    }
}

/* ===== АНИМАЦИИ ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card,
.material-card,
.portfolio-item,
.review-card,
.step-card {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== ПЛАВНЫЙ СКРОЛЛ ===== */
html {
    scroll-behavior: smooth;
}

/* ===== ВЫДЕЛЕНИЕ ТЕКСТА ===== */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}