/* Основная палитра - строгие индустриальные цвета */
:root {
    --color-primary: #1a3a52;        /* Глубокий темно-синий */
    --color-primary-dark: #0d1f2b;
    --color-primary-light: #2d5a73;
    --color-accent: #e85d04;         /* Оранжевый акцент (индустриальный) */
    --color-accent-hover: #c44d00;
    --color-secondary: #6c757d;      /* Серый технический */
    
    /* Тексты */
    --color-text: #212529;
    --color-text-light: #495057;
    --color-text-muted: #6c757d;
    --color-text-inverse: #ffffff;
    
    /* Фоны */
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-dark: #1a1a2e;
    --color-bg-industrial: #2c3e50;
    
    /* Границы */
    --color-border: #dee2e6;
    --color-border-dark: #adb5bd;
    
    /* Технические цвета */
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-info: #17a2b8;
    --color-danger: #dc3545;
    
    /* Шрифты */
    --font-family: 'Inter', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
    
    /* Размеры */
    --container-width: 1280px;
    --container-narrow: 900px;
    
    /* Анимации */
    --transition: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    /* Тени */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    
    /* Радиусы - более строгие, менее скругленные */
    --radius-lg: 4px;
    --radius-md: 3px;
    --radius-sm: 2px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: var(--container-narrow);
}

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

/* Ссылки-кликабельные строки (например, список типов газов) */
.gas-link {
    text-decoration: underline;
    text-underline-offset: 3px;
}

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

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

h1 {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: 1.35rem;
}

p {
    margin-bottom: 1rem;
}

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

.text-primary {
    color: var(--color-primary);
}

.text-muted {
    color: var(--color-text-muted);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-size: 0.8rem;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
    box-shadow: 0 2px 8px rgba(232, 93, 4, 0.3);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(232, 93, 4, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.5);
}

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

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

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
}
.btn-full {
    width: 100%;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 0.85rem;
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.75rem;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    z-index: 1000;
}

.header-top {
    background: var(--color-primary-dark);
    color: white;
    padding: 10px 0;
    font-size: 0.8rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top-info {
    display: flex;
    gap: 32px;
    align-items: center;
}

.header-top-info a {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-top-info a:hover {
    color: white;
}

.header-top-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-main {
    padding: 0;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 3px solid var(--color-accent);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

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

.burger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.burger-menu span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-left: auto;
}

/* Перенос текста в пункте "Производство/Реализованные проекты" */
.nav-link:nth-child(5) {
    max-width: 120px;
    white-space: normal;
    line-height: 1.2;
    margin-right: 16px;
}

.nav-link {
    color: var(--color-text);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 16px;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--color-accent);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    width: 80%;
}

.lang-switcher {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.75rem;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lang-switcher:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 700px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(26, 58, 82, 0.95) 0%, rgba(13, 31, 43, 0.98) 100%),
                url('reference/УОГ производство/IMG_20160427_144827.jpg') center/cover no-repeat;
    margin-top: 100px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255,255,255,0.02) 2px,
            rgba(255,255,255,0.02) 4px
        );
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-content {
    color: white;
}

.hero-content h1 {
    color: white;
    margin-bottom: 24px;
    line-height: 1.15;
}

.hero-content h1 .highlight {
    color: var(--color-accent);
    display: block;
    font-size: 1.1em;
    margin-top: 8px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 550px;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.15);
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 8px;
    font-family: var(--font-mono);
}

.stat-desc {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    line-height: 1.4;
}

.hero-image {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.hero-image img {
    width: 100%;
    max-width: 520px;
    border-radius: var(--radius-lg);
    box-shadow: 0 30px 80px rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.1);
}

.hero-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: flex-start;
    width: 100%;
}

.hero-links a {
    color: rgba(255,255,255,0.7);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 8px 16px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.hero-links a:hover {
    color: white;
    border-color: var(--color-accent);
    background: rgba(232, 93, 4, 0.1);
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 24px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.section-tag::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    margin-right: 10px;
}

.section-tag-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 24px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.section-tag-link::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    margin-right: 10px;
}

.section-tag-link:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.section-header h2 {
    font-size: 2.25rem;
    margin-bottom: 0;
    position: relative;
    display: inline-block;
    color: var(--color-primary);
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    margin: 16px auto 0;
}

/* ===== About Section ===== */
.about {
    padding: 100px 0;
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
    line-height: 1.9;
}

.about-text strong {
    color: var(--color-primary);
    font-weight: 700;
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.process-step {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    transition: var(--transition);
}

.process-step:hover {
    background: white;
    box-shadow: var(--shadow-md);
    border-left-color: var(--color-accent);
}

.step-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    min-width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

.step-content h4 {
    font-size: 1.05rem;
    margin-bottom: 6px;
    color: var(--color-text);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.step-content p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.6;
}

.visual-card {
    background: white;
    border-radius: var(--radius-md);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.visual-card h3 {
    margin-bottom: 24px;
    color: var(--color-primary);
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-border);
}

.advantages-list {
    list-style: none;
}

.advantages-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
}

.advantages-list li:last-child {
    border-bottom: none;
}

.check {
    width: 20px;
    height: 20px;
    background: var(--color-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

/* ===== Catalog/Models Section ===== */
.models {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    align-items: stretch;
}

.model-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    height: 100%;
}


.model-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}


.model-header {
    padding: 24px;
    background: var(--color-primary);
    color: white;
}

.model-header h3 {
    margin: 0;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.model-image {
    height: 220px;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.model-card:hover .model-image img {
    transform: scale(1.05);
}

.model-specs {
    padding: 24px;
    flex: 1;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-border);
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-label {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.spec-value {
    font-weight: 600;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.95rem;
}

.model-card .btn {
    margin: 24px;
    width: calc(100% - 48px);
}

/* ===== Calculator Section ===== */
.calculator {
    padding: 100px 0;
    background: var(--color-bg);
}

.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
}

.calculator-form {
    background: white;
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    font-family: var(--font-mono);
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(26, 58, 82, 0.1);
}

.calculator-note {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 20px;
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.calculator-results {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: white;
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.result-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.result-icon {
    font-size: 2rem;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.result-content {
    flex: 1;
}

.result-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.result-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-mono);
}

/* ===== Cost Breakdown Cards ===== */
.result-card.cost-breakdown {
    padding: 18px 24px;
}

.result-card.cost-breakdown .result-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
    background: var(--color-bg-alt);
}

.result-card.cost-breakdown .result-value {
    font-size: 1.25rem;
}

.result-card.cost-breakdown.total {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-color: var(--color-primary);
}

.result-card.cost-breakdown.total .result-icon {
    background: rgba(255, 255, 255, 0.2);
}

.result-card.cost-breakdown.total .result-label {
    color: rgba(255, 255, 255, 0.8);
}

.result-card.cost-breakdown.total .result-value {
    color: white;
    font-size: 1.75rem;
}

/* ===== Analysis Card ===== */
.analysis-card {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, rgba(232, 93, 4, 0.05), rgba(26, 58, 82, 0.05));
}

.btn-accent {
    background: var(--color-accent);
    color: white;
    border: none;
    box-shadow: 0 2px 8px rgba(232, 93, 4, 0.3);
}

.btn-accent:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(232, 93, 4, 0.4);
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 18, 38, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.modal {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-md);
    padding: 40px;
    max-width: 500px;
    width: 90%;
    position: relative;
    transform: translateY(30px);
    transition: transform 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--color-text-muted);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.modal h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.modal-subtitle {
    color: var(--color-text-muted);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

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

.modal-form input,
.modal-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--color-bg-alt);
    transition: all 0.3s ease;
}

.modal-form input:focus,
.modal-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(26, 58, 82, 0.1);
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 20px;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--color-bg);
}

.file-upload-label:hover {
    border-color: var(--color-accent);
    background: rgba(232, 93, 4, 0.03);
}

.file-upload-label input {
    display: none;
}

.file-upload-text {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    text-align: center;
}

.file-upload-label:hover .file-upload-text {
    color: var(--color-accent);
}

/* ===== Production Section ===== */
.production {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.production-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
}

.production-intro p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    line-height: 1.8;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.gallery-item {
    aspect-ratio: 4/3;
    background: var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.gallery-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.4) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.gallery-item:hover::after {
    opacity: 1;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.08);
}

/* ===== Contacts Section ===== */
.contacts {
    padding: 100px 0;
    background: var(--color-bg);
}

.contacts-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contacts-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    font-size: 1.5rem;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    color: white;
    flex-shrink: 0;
}

.contact-card h4 {
    font-size: 0.75rem;
    margin-bottom: 6px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.contact-card a,
.contact-card p {
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
}

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

.contact-form-wrapper {
    background: white;
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.contact-form-wrapper h3 {
    margin-bottom: 28px;
    color: var(--color-primary);
    font-size: 1.35rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(26, 58, 82, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 140px;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-primary-dark);
    color: white;
    padding: 60px 0 30px;
    border-top: 4px solid var(--color-accent);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 30px;
}

.footer-brand .logo-text {
    color: white;
    margin-bottom: 12px;
    display: block;
}

.footer-brand p {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 8px 16px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    border-color: var(--color-accent);
    background: rgba(232, 93, 4, 0.1);
}

.footer-bottom {
    text-align: center;
    color: rgba(255,255,255,0.4);
    font-size: 0.8rem;
}

/* ===== Page Header (for inner pages) ===== */
.page-header {
    padding: 180px 0 80px;
    background: linear-gradient(135deg, #1a3a52 0%, #0d1f2b 100%);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255,255,255,0.02) 2px,
            rgba(255,255,255,0.02) 4px
        );
}

.page-header h1 {
    color: white;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.page-header p {
    color: rgba(255,255,255,0.7);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* ===== Content Page ===== */
.content-page {
    padding: 160px 0 100px;
}

/* ===== Section Styles for Gas Pages ===== */
.section {
    margin-bottom: 60px;
}

.section__title {
    color: var(--color-primary);
    font-size: 1.75rem;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 3px solid var(--color-accent);
}

.section__subtitle {
    color: var(--color-text);
    font-size: 1.15rem;
    font-weight: 600;
    margin: 32px 0 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section__list {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 24px 24px 24px 48px;
    margin: 24px 0;
    border-left: 4px solid var(--color-primary);
}

.section__list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    line-height: 1.6;
}

.section__list li:last-child {
    border-bottom: none;
}

.section__table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.section__table th {
    background: var(--color-primary);
    color: white;
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.8rem;
}

.section__table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.95rem;
    line-height: 1.5;
}

.section__table tr:hover {
    background: var(--color-bg-alt);
}

.section__table tr:last-child td {
    border-bottom: none;
}

.section__table td:first-child {
    font-weight: 600;
    color: var(--color-primary);
}

.section__cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 32px 0;
}

.section__cta--centered {
    justify-content: center;
}

.formula {
    background: var(--color-bg-alt);
    padding: 20px 32px;
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1.2rem;
    text-align: center;
    margin: 24px 0;
    border: 2px solid var(--color-border);
    color: var(--color-primary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 32px 0;
}

.advantages-grid__item {
    background: white;
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-primary);
    transition: var(--transition);
}

.advantages-grid__item:hover {
    box-shadow: var(--shadow-lg);
    border-left-color: var(--color-accent);
}

.advantages-grid__title {
    color: var(--color-primary);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.advantages-grid__item p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

/* ===== Contact Form for Gas Pages ===== */
.contact-form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.contact-form__field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contact-form__field label {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-form__field input,
.contact-form__field textarea {
    padding: 14px 16px;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.contact-form__field input:focus,
.contact-form__field textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(26, 58, 82, 0.1);
}

.contact-form__field textarea {
    resize: vertical;
    min-height: 120px;
}

.content-block {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.content-block h2 {
    color: var(--color-primary);
    margin: 50px 0 24px;
    padding-bottom: 16px;
    border-bottom: 3px solid var(--color-accent);
}

.content-block h2:first-child {
    margin-top: 0;
}

.content-block h3 {
    margin: 32px 0 16px;
    color: var(--color-text);
    font-size: 1.2rem;
}

.content-block p {
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 20px;
}

.content-block ul,
.content-block ol {
    color: var(--color-text-light);
    margin: 20px 0;
    padding-left: 24px;
}

.content-block li {
    margin-bottom: 12px;
    line-height: 1.7;
}

.content-block .highlight-box {
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-accent);
    padding: 24px;
    margin: 32px 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.content-block .highlight-box h4 {
    color: var(--color-primary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

/* Базовые стили для ul без класса section__list */
.content-block ul:not(.section__list):not(.advantages-list):not(.breadcrumbs-list):not(.footer-links):not(.nav) {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 24px 24px 24px 48px;
    margin: 24px 0;
    border-left: 4px solid var(--color-primary);
    list-style: none;
}

.content-block ul:not(.section__list):not(.advantages-list):not(.breadcrumbs-list):not(.footer-links):not(.nav) li {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    line-height: 1.6;
}

.content-block ul:not(.section__list):not(.advantages-list):not(.breadcrumbs-list):not(.footer-links):not(.nav) li:last-child {
    border-bottom: none;
}

/* Hero section для страниц с контентом */
.hero-section {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 40px;
}

.hero-section__title {
    color: var(--color-primary);
    margin-bottom: 20px;
    font-size: 1.75rem;
}

.hero-section__lead {
    color: var(--color-text-light);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.hero-section__cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 24px;
}

/* ===== Tech Specs Table ===== */
.tech-table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    font-size: 0.95rem;
}

.tech-table th,
.tech-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.tech-table th {
    background: var(--color-primary);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.8rem;
}

.tech-table tr:hover {
    background: var(--color-bg-alt);
}

.tech-table td:first-child {
    font-weight: 500;
    color: var(--color-text);
}

.tech-table td:last-child {
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-weight: 600;
}

/* ===== Info Cards Grid ===== */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.info-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
}

.info-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.info-card-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.info-card h4 {
    color: var(--color-primary);
    margin-bottom: 12px;
    font-size: 1.05rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
}

/* ===== Breadcrumbs ===== */
.breadcrumbs {
    padding: 20px 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.breadcrumbs-list {
    display: flex;
    gap: 10px;
    align-items: center;
    font-size: 0.85rem;
}

.breadcrumbs-list li {
    list-style: none;
}

.breadcrumbs-list a {
    color: var(--color-text-muted);
    transition: var(--transition);
}

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

.breadcrumbs-separator {
    color: var(--color-border-dark);
}

.breadcrumbs-current {
    color: var(--color-text);
    font-weight: 600;
}

/* ===== Document Cards ===== */
.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.document-card {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: var(--transition);
}

.document-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.document-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.document-content {
    flex: 1;
}

.document-title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.document-meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.document-download {
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 10px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

/* ===== Comparison Section ===== */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 40px 0;
    font-size: 0.9rem;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: center;
    border: 1px solid var(--color-border);
}

.comparison-table th {
    background: var(--color-primary);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}

.comparison-table th:first-child {
    text-align: left;
    min-width: 200px;
}

.comparison-table td:first-child {
    text-align: left;
    font-weight: 600;
    background: var(--color-bg-alt);
}

.comparison-table .highlight-col {
    background: rgba(232, 93, 4, 0.05);
}

.comparison-table .check {
    color: var(--color-success);
    font-size: 1.2rem;
}

.comparison-table .cross {
    color: var(--color-danger);
    font-size: 1.2rem;
}

/* ===== Projects Grid ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 28px;
}

.project-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.project-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.project-image {
    height: 220px;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.project-card:hover .project-image img {
    transform: scale(1.08);
}

.project-content {
    padding: 24px;
}

.project-content h3 {
    color: var(--color-primary);
    margin-bottom: 10px;
    font-size: 1.15rem;
}

.project-content p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.project-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tag {
    padding: 6px 14px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* ===== Calculator Section (for comparison page) ===== */
.calculator-section {
    background: var(--color-bg-alt);
    padding: 40px;
    border-radius: var(--radius-lg);
    margin: 40px 0;
}

.calculator-section h3 {
    color: var(--color-primary);
    margin-bottom: 24px;
}

/* ===== Advantage Cards ===== */
.advantage-card {
    background: white;
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-primary);
    transition: var(--transition);
}

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

.advantage-card h4 {
    color: var(--color-primary);
    margin-bottom: 12px;
    font-size: 1.05rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.advantage-card p {
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.7;
}

/* ===== Table Wrapper for Horizontal Scroll ===== */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 20px 0;
}

.table-wrapper .comparison-table {
    min-width: 700px;
}

/* ===== Comparison Table Extensions ===== */
.comparison-table .highlight-row {
    background: rgba(26, 58, 82, 0.05);
    border-left: 3px solid var(--color-primary);
}

.comparison-table .highlight-row td:first-child {
    font-weight: 600;
    color: var(--color-primary);
}

.comparison-table .best-value {
    color: var(--color-primary);
    font-weight: 600;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a3a52 0%, #0d1f2b 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255,255,255,0.02) 2px,
            rgba(255,255,255,0.02) 4px
        );
}

.cta-section h2 {
    color: white;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-section p {
    opacity: 0.9;
    margin-bottom: 40px;
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
}

.cta-section .btn-primary {
    background: var(--color-accent);
    color: white;
    position: relative;
    z-index: 1;
}

.cta-section .btn-primary:hover {
    background: var(--color-accent-hover);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-container,
    .about-grid,
    .calculator-wrapper,
    .contacts-wrapper {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        order: -1;
        margin-bottom: 40px;
    }
    
    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .stat-num {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .header-top {
        display: none !important;
    }
    
    .header .burger-menu {
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        gap: 5px !important;
        padding: 8px !important;
        background: transparent !important;
        border: none !important;
        cursor: pointer !important;
        width: 40px !important;
        height: 40px !important;
        position: relative !important;
        z-index: 1001 !important;
    }
    
    .header .burger-menu span {
        display: block !important;
        width: 24px !important;
        height: 2px !important;
        background: var(--color-primary) !important;
        border-radius: 2px !important;
        transition: var(--transition) !important;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        right: 16px;
        transform: translateX(100%);
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        border-bottom: 1px solid var(--color-border);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-md);
        white-space: nowrap;
        width: fit-content;
        max-width: calc(100vw - 32px);
    }
    
    .nav.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
        z-index: 1001;
    }
    
    .hero {
        padding: 60px 0;
        min-height: auto;
        margin-top: 70px;
    }
    
    .hero-container {
        gap: 40px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .models-grid,
    .projects-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-stat {
        align-items: center;
    }
    
    .calculator-form,
    .contact-form-wrapper {
        padding: 24px;
    }
    
    .calculator-wrapper {
        grid-template-columns: 1fr;
    }
    
    .calculator-form {
        order: 1;
    }
    
    .calculator-results {
        order: 2;
    }
}