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

:root {
    --primary: #1a3a5c;
    --primary-light: #2a5a8c;
    --secondary: #4fc3f7;
    --accent: #00e5ff;
    --dark: #0d1b2a;
    --dark-overlay: rgba(13, 27, 42, 0.75);
    --light: #e8f4f8;
    --white: #ffffff;
    --text-light: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.65);
    --gold: #ffd700;
    --gradient-primary: linear-gradient(135deg, #1a3a5c 0%, #4fc3f7 100%);
    --gradient-dark: linear-gradient(180deg, rgba(13, 27, 42, 0.9) 0%, rgba(26, 58, 92, 0.85) 100%);
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: 'Montserrat', sans-serif;
    color: var(--text-light);
    background: var(--dark);
    overflow-x: hidden;
    line-height: 1.7;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--dark);
}
::-webkit-scrollbar-thumb {
    background: var(--secondary);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(13, 27, 42, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--white);
}

.logo-icon {
    font-size: 28px;
    color: var(--accent);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { text-shadow: 0 0 10px rgba(0, 229, 255, 0.5); }
    50% { text-shadow: 0 0 25px rgba(0, 229, 255, 0.9), 0 0 50px rgba(0, 229, 255, 0.4); }
}

.logo-text {
    font-family: 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 3px;
    background: linear-gradient(90deg, var(--white), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
    /* background: rgba(79, 195, 247, 0.15); */
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Sections Base ===== */
.section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Parallax Background Image Container */
.section-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 120%;
    background-size: cover;
    background-position: center;
    z-index: -2;
    will-change: transform;
    /* Parallax effect via CSS as fallback */
    background-attachment: fixed;
}

/* Section-specific backgrounds (applied via JS or inline) */
.section-ozonation .section-bg {
    background-image: url('bg1.png');
}

.section-process .section-bg {
    background-image: url('bg2.png');
}

.section-services .section-bg {
    background-image: url('bg3.png');
}

.section-about .section-bg {
    background-image: url('bg4.png');
}

.section-contacts .section-bg {
    background-image: url('bg5.png');
}

/* Overlay */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-overlay);
    z-index: -1;
}

.content-wrapper {
    position: relative;
    z-index: 1;
    width: 100%;
    padding: 120px 0;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-subtitle {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    position: relative;
}

.section-subtitle::before,
.section-subtitle::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40px;
    height: 1px;
    background: var(--accent);
    opacity: 0.5;
}

.section-subtitle::before {
    right: calc(100% + 16px);
}

.section-subtitle::after {
    left: calc(100% + 16px);
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.2;
}

.title-line {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    margin: 0 auto;
    border-radius: 2px;
}

/* ===== Section 1: Озонирование ===== */
.ozonation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.ozonation-text p {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-light);
    margin-bottom: 24px;
    text-align: justify;
}

.ozonation-text p:first-child::first-letter {
    font-family: 'Playfair Display', serif;
    font-size: 56px;
    float: left;
    line-height: 0.8;
    margin-right: 12px;
    margin-top: 8px;
    color: var(--accent);
    font-weight: 700;
}

.ozonation-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: rgba(79, 195, 247, 0.1);
    border-color: rgba(0, 229, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 229, 255, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===== Section 2: Процесс ===== */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.step-item {
    position: relative;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 24px;
    padding: 48px 32px 40px;
    text-align: center;
    transition: var(--transition);
}

.step-item:hover {
    transform: translateY(-10px);
    background: rgba(79, 195, 247, 0.08);
    border-color: rgba(0, 229, 255, 0.25);
}

.step-number {
    font-family: 'Playfair Display', serif;
    font-size: 64px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.4;
    margin-bottom: 20px;
    line-height: 1;
}

.step-item h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.step-item p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Connector lines between steps */
.step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -18px;
    width: 36px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0.4;
}

/* ===== Section 3: Услуги и Цены ===== */
.services-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.price-category {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.category-title {
    font-family: 'Playfair Display', serif;
    font-size: 26px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(0, 229, 255, 0.2);
}

.price-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.price-card {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 18px;
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.price-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent), var(--secondary));
    border-radius: 4px 0 0 4px;
}

.price-card:hover {
    transform: translateY(-5px);
    background: rgba(79, 195, 247, 0.08);
    border-color: rgba(0, 229, 255, 0.25);
    box-shadow: 0 15px 40px rgba(0, 229, 255, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.card-service {
    font-size: 17px;
    font-weight: 700;
    color: var(--white);
}

.card-area {
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    background: rgba(0, 229, 255, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
}

.card-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.detail-label {
    font-size: 13px;
    color: var(--text-muted);
}

.detail-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-light);
}

.card-price {
    font-family: 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: right;
}

.services-note {
    margin-top: 32px;
    padding: 24px 32px;
    background: rgba(255, 215, 0, 0.08);
    border-left: 4px solid var(--gold);
    border-radius: 0 12px 12px 0;
}

.services-note p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===== Section 4: О нас ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text p {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-light);
    margin-bottom: 24px;
    text-align: justify;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 40px 28px;
    text-align: center;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-6px) scale(1.03);
    background: rgba(79, 195, 247, 0.1);
    border-color: rgba(0, 229, 255, 0.3);
}

.stat-number {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 56px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* ===== Section 5: Контакты ===== */
.contacts-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

/* Contact Info */
.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(79, 195, 247, 0.08);
    border-color: rgba(0, 229, 255, 0.2);
    transform: translateX(6px);
}

.contact-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.contact-details a,
.contact-details span {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-details p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Quick Contact Buttons */
.quick-contact {
    margin-top: 32px;
}

.quick-contact h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.quick-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.quick-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 20px;
    border: none;
    border-radius: 14px;
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.quick-btn svg {
    flex-shrink: 0;
}

.whatsapp-btn {
    background: linear-gradient(135deg, #25d366, #128c7e);
}
.whatsapp-btn:hover {
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.4);
    transform: translateY(-3px);
}

.telegram-btn {
    background: linear-gradient(135deg, #0088cc, #229ed9);
}
.telegram-btn:hover {
    box-shadow: 0 8px 30px rgba(0, 136, 204, 0.4);
    transform: translateY(-3px);
}

.email-btn {
    background: linear-gradient(135deg, #ea4335, #fbbc05);
}
.email-btn:hover {
    box-shadow: 0 8px 30px rgba(234, 67, 53, 0.4);
    transform: translateY(-3px);
}

.callback-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}
.callback-btn:hover {
    box-shadow: 0 8px 30px rgba(79, 195, 247, 0.4);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form-wrapper {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 48px 40px;
}

.contact-form-wrapper h3 {
    font-family: 'Playfair Display', serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 32px;
    text-align: center;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    color: var(--white);
    font-family: 'Montserrat', sans-serif;
    font-size: 15px;
    transition: var(--transition);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: rgba(79, 195, 247, 0.08);
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.1);
}

.form-group select {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234fc3f7' stroke-width='2' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 20px center;
}

.form-group select option {
    background: var(--dark);
    color: var(--text-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    padding: 18px 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 14px;
    color: var(--white);
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.submit-btn:hover::before {
    left: 100%;
}

.submit-btn:hover {
    box-shadow: 0 10px 40px rgba(79, 195, 247, 0.3);
    transform: translateY(-3px);
}

.submit-btn:active {
    transform: translateY(-1px);
}

/* ===== Footer ===== */
.footer {
    background: rgba(13, 27, 42, 0.95);
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== Scroll to Top ===== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(79, 195, 247, 0.4);
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    top: 100px;
    right: 30px;
    padding: 20px 32px;
    border-radius: 16px;
    color: var(--white);
    font-family: 'Montserrat', sans-serif;
    font-size: 15px;
    font-weight: 600;
    z-index: 9999;
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.4s ease;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success {
    background: rgba(37, 211, 102, 0.9);
    border: 1px solid rgba(37, 211, 102, 0.5);
}

.toast.error {
    background: rgba(234, 67, 53, 0.9);
    border: 1px solid rgba(234, 67, 53, 0.5);
}

.toast.info {
    background: rgba(0, 136, 204, 0.9);
    border: 1px solid rgba(0, 136, 204, 0.5);
}

/* ===== Responsive Design ===== */
@media (max-width: 1200px) {
    .container {
        padding: 0 30px;
    }
    
    .ozonation-content,
    .about-content,
    .contacts-content {
        gap: 40px;
    }
}

@media (max-width: 1024px) {
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .step-item:not(:last-child)::after {
        display: none;
    }
    
    .ozonation-features {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(13, 27, 42, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 8px;
        transition: right 0.4s ease;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 16px;
        padding: 14px 20px;
        border-radius: 14px;
    }
    
    /* Sections */
    .content-wrapper {
        padding: 80px 0;
    }
    
    .section-header {
        margin-bottom: 50px;
    }
    
    /* Section 1 */
    .ozonation-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .ozonation-features {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    /* Section 2 */
    .process-steps {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Section 3 */
    .price-cards {
        grid-template-columns: 1fr;
    }
    
    .card-price {
        font-size: 20px;
    }
    
    /* Section 4 */
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    /* Section 5 */
    .contacts-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-form-wrapper {
        padding: 32px 24px;
    }
    
    .quick-buttons {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 20px;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .ozonation-features {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: 28px 20px;
    }
    
    .stat-number {
        font-size: 44px;
    }
    
    
    .nav-container {
        padding: 0 20px;
    }
}

/* ===== Parallax fix for mobile ===== */
@media (max-width: 768px) {
    .section-bg {
        background-attachment: scroll;
    }
}

/* Ensure sections have proper positioning for parallax */
.section {
    position: relative;
}

.content-wrapper {
    position: relative;
    z-index: 1;
}