/* ========================================
   СВАРКА ВОДОЙ - Современный дизайн 2024
   Цветовая палитра: Синий + Оранжевый
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #1a5f7a;
    --primary-dark: #0d3d4d;
    --primary-light: #2980b9;
    --accent-color: #e67e22;
    --accent-hover: #d35400;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #ecf0f1;
    --gradient-primary: linear-gradient(135deg, #1a5f7a 0%, #2980b9 100%);
    --gradient-accent: linear-gradient(135deg, #e67e22 0%, #f39c12 100%);
    --shadow-light: 0 2px 15px rgba(0,0,0,0.08);
    --shadow-medium: 0 5px 30px rgba(0,0,0,0.12);
    --shadow-heavy: 0 10px 50px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --border-radius-lg: 20px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

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

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

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

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

/* ========================================
   HEADER
   ======================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

header.scrolled {
    background: rgba(255,255,255,0.98);
    box-shadow: var(--shadow-medium);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.2;
}

.logo-text span {
    color: var(--accent-color);
}

/* Navigation */
nav ul {
    display: flex;
    gap: 35px;
    list-style: none;
}

nav a {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 5px 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

/* Header Contact */
.header-contact {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-phone {
    font-weight: 600;
    color: var(--primary-dark);
    font-size: 1.1rem;
}

.header-phone i {
    color: var(--accent-color);
    margin-right: 8px;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></svg>') repeat;
    background-size: 100px 100px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    color: white;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    margin-bottom: 25px;
    backdrop-filter: blur(10px);
}

.hero h1 {
    color: white;
    margin-bottom: 25px;
}

.hero h1 span {
    color: var(--accent-color);
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 35px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 50px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.8);
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-heavy);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 35px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(230,126,34,0.4);
    color: white;
}

.btn-secondary {
    background: rgba(255,255,255,0.15);
    color: white;
    border: 2px solid rgba(255,255,255,0.3);
}

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

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

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

/* ========================================
   SECTIONS
   ======================================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.section-title {
    margin-bottom: 20px;
}

.section-description {
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-light);
}

/* ========================================
   FEATURES / ADVANTAGES
   ======================================== */
.features {
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 0.95rem;
}

/* ========================================
   PRODUCTS
   ======================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

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

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

.product-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.product-content {
    padding: 30px;
}

.product-content h3 {
    margin-bottom: 10px;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}

.product-spec {
    background: var(--bg-light);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

/* ========================================
   SERVICES
   ======================================== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius-lg);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--accent-color);
    transition: var(--transition);
}

.service-card:hover::before {
    height: 100%;
}

.service-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-medium);
}

.service-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--bg-light);
    position: absolute;
    top: 20px;
    right: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.service-card p {
    position: relative;
    z-index: 1;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    font-weight: 600;
    color: var(--accent-color);
}

.service-link:hover {
    gap: 15px;
}

/* ========================================
   ABOUT
   ======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-heavy);
}

.about-experience {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background: var(--accent-color);
    color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-medium);
}

.about-experience .number {
    font-size: 3rem;
    font-weight: 700;
    display: block;
}

.about-experience .text {
    font-size: 0.9rem;
}

.about-text h2 {
    margin-bottom: 25px;
}

.about-list {
    list-style: none;
    margin: 25px 0;
}

.about-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 15px;
}

.about-list li::before {
    content: '\2713';
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 25px;
    height: 25px;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 700;
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
    color: white;
}

.cta h2 {
    color: white;
    margin-bottom: 20px;
}

.cta p {
    color: rgba(255,255,255,0.9);
    font-size: 1.2rem;
    margin-bottom: 30px;
}

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

/* ========================================
   CONTACTS
   ======================================== */
.contacts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h4 {
    margin-bottom: 5px;
}

.contact-details p {
    margin-bottom: 0;
}

.contact-details a {
    color: var(--primary-color);
    font-weight: 500;
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: var(--border-radius-lg);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* ========================================
   FOOTER
   ======================================== */
footer {
    background: var(--primary-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
}

.footer-links h4 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    margin: 0;
}

/* ========================================
   PAGE HEADER
   ======================================== */
.page-header {
    background: var(--gradient-primary);
    padding: 150px 0 80px;
    text-align: center;
    color: white;
}

.page-header h1 {
    color: white;
    margin-bottom: 15px;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 10px;
    color: rgba(255,255,255,0.8);
}

.breadcrumb a {
    color: rgba(255,255,255,0.8);
}

.breadcrumb a:hover {
    color: white;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-experience {
        position: relative;
        bottom: auto;
        right: auto;
        margin-top: 20px;
        display: inline-block;
    }

    .contacts-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: var(--shadow-medium);
        padding: 20px;
    }

    nav ul {
        flex-direction: column;
        gap: 0;
    }

    nav ul li {
        border-bottom: 1px solid var(--border-color);
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    nav a {
        display: block;
        padding: 15px 10px;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .header-phone {
        display: none;
    }

    .header-contact .btn {
        display: none;
    }

    section {
        padding: 60px 0;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .products-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }

    .btn {
        padding: 12px 25px;
        width: 100%;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .feature-card,
    .product-card,
    .service-card {
        padding: 25px 20px;
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-accent { color: var(--accent-color); }
.bg-light { background: var(--bg-light); }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.pt-20 { padding-top: 20px; }
.pb-20 { padding-bottom: 20px; }