/* ==========================================================================
   Оптика ALIK — Modern Optics Website Styles
   ==========================================================================
   Table of Contents:
   1. CSS Custom Properties
   2. Reset & Base
   3. Typography
   4. Layout
   5. Buttons
   6. Navigation
   7. Hero Section
   8. About Section
   9. Services Section
   10. Brands Section
   11. Advantages Section
   12. CTA Section
   13. Contacts Section
   14. Footer
   15. Section & Element Animations
   16. Media Queries
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties
   ========================================================================== */

:root {
    /* Colors - Modern Dark Theme */
    --color-primary: #c9a96e;
    --color-primary-light: #d4ba85;
    --color-primary-dark: #b8944f;
    --color-bg: #0a0a0f;
    --color-bg-alt: #111118;
    --color-bg-card: #16161f;
    --color-bg-card-hover: #1e1e2a;
    --color-surface: #1a1a25;
    --color-text: #e8e8ed;
    --color-text-muted: #a0a0b2;
    --color-text-subtle: #6b6b80;
    --color-border: #2a2a3a;
    --color-border-light: #35354a;
    --color-white: #ffffff;
    --color-black: #000000;

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 50px rgba(201, 169, 110, 0.25), 0 0 15px rgba(201, 169, 110, 0.15);
    --shadow-lift: 0 14px 28px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.4), 0 0 50px rgba(201, 169, 110, 0.25), 0 0 15px rgba(201, 169, 110, 0.15);
    --shadow-lift-soft: 0 12px 24px rgba(0, 0, 0, 0.45), 0 4px 8px rgba(0, 0, 0, 0.35);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
}

address {
    font-style: normal;
}

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

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-white);
}

.section-header {
    margin-bottom: var(--space-3xl);
}

.section-header--center {
    text-align: center;
}

.section-label {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    position: relative;
    padding-left: 3rem;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 2rem;
    height: 1px;
    background-color: var(--color-primary);
}

.section-header--center .section-label {
    padding-left: 0;
    padding-bottom: var(--space-sm);
}

.section-header--center .section-label::before {
    display: none;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   4. Layout
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--space-5xl) 0;
}

/* ==========================================================================
   5. Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.875rem 2rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    color: var(--color-bg);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

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

.btn--large {
    padding: 1.125rem 2.5rem;
    font-size: 0.9375rem;
}

/* ==========================================================================
   6. Navigation
   ========================================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-lg) 0;
    transition: all var(--transition-base);
}

.nav--scrolled {
    background-color: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.nav__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-white);
}

.nav__logo-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.nav__logo-text {
    font-family: var(--font-body);
    font-size: 0.875rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.nav__logo-text strong {
    color: var(--color-white);
    font-weight: 700;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav__toggle-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-base);
}

.nav__toggle--active .nav__toggle-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle--active .nav__toggle-line:nth-child(2) {
    opacity: 0;
}

.nav__toggle--active .nav__toggle-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   7. Hero Section
   ========================================================================== */

.header {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(201, 169, 110, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(201, 169, 110, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.hero__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--space-3xl);
    position: relative;
    z-index: 1;
}

.hero__subtitle {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.hero__title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-white);
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

.hero__description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
    max-width: 480px;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero__visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__glasses-icon {
    width: 100%;
    max-width: 400px;
    color: var(--color-primary);
    opacity: 0.15;
    animation: float 6s ease-in-out infinite;
}

.hero__scroll {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.hero__scroll-text {
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-subtle);
}

.hero__scroll-line {
    display: block;
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

/* ==========================================================================
   8. About Section
   ========================================================================== */

.about {
    background-color: var(--color-bg);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.about__lead {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    font-weight: 400;
}

.about__text p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.stat {
    padding: var(--space-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition:
        opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
    filter: blur(3px);
}

.stat.animate-in {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

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

.stat__number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.stat__label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

/* ==========================================================================
   9. Services Section
   ========================================================================== */

.services {
    background-color: var(--color-bg-alt);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.service-card {
    position: relative;
    padding: var(--space-2xl);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition:
        opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        border-color var(--transition-base),
        background-color var(--transition-base),
        box-shadow var(--transition-base);
    opacity: 0;
    transform: translateY(40px);
    filter: blur(3px);
}

.service-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

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

.service-card--featured {
    border-color: var(--color-primary-dark);
    background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(201, 169, 110, 0.05) 100%);
}

.service-card__badge {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    background-color: rgba(201, 169, 110, 0.1);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
}

.service-card__icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
}

.service-card__icon svg {
    width: 100%;
    height: 100%;
}

.service-card__title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.service-card__text {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

/* ==========================================================================
   10. Brands Section
   ========================================================================== */

.brands {
    background-color: var(--color-bg);
    position: relative;
}

.brands__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.brands__text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
}

.brands__text strong {
    color: var(--color-white);
}

.brands__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.brands__feature {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    transition:
        opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        background-color var(--transition-base),
        box-shadow var(--transition-base);
    opacity: 0;
    transform: translateX(-30px);
    filter: blur(3px);
}

.brands__feature.animate-in {
    opacity: 1;
    transform: translateX(0);
    filter: blur(0);
}

.brands__feature:hover {
    background-color: var(--color-surface);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lift-soft);
}

.brands__feature-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-top: 2px;
}

.brands__feature-title {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-white);
}

.brands__feature-text {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

.brands__visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brands__card {
    width: 100%;
    max-width: 380px;
    padding: var(--space-3xl);
    background: linear-gradient(145deg, var(--color-bg-card) 0%, rgba(201, 169, 110, 0.08) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.brands__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.brands__card-label {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-2xl);
}

.brands__card-logo {
    margin-bottom: var(--space-xl);
}

.brands__essilor-text {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.05em;
}

.brands__card-divider {
    width: 60px;
    height: 1px;
    background-color: var(--color-primary);
    margin: var(--space-xl) auto;
}

.brands__stellest-text {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: var(--space-md);
}

.brands__card-desc {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ==========================================================================
   11. Advantages Section
   ========================================================================== */

.advantages {
    background-color: var(--color-bg-alt);
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.advantage {
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    transition:
        opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        background-color var(--transition-base),
        box-shadow var(--transition-base);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    filter: blur(3px);
}

.advantage.animate-in {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

.advantage:hover {
    background-color: var(--color-surface);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lift-soft);
}

.advantage__number {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-border);
    margin-bottom: var(--space-lg);
    line-height: 1;
    transition: color 0.3s ease;
}

.advantage:hover .advantage__number {
    color: var(--color-primary);
}

.advantage__title {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.advantage__text {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text-muted);
}

/* ==========================================================================
   12. CTA Section
   ========================================================================== */

.cta {
    background: linear-gradient(135deg, var(--color-bg) 0%, rgba(201, 169, 110, 0.08) 50%, var(--color-bg) 100%);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.cta::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.cta__content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta__title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    margin-bottom: var(--space-lg);
    color: var(--color-white);
}

.cta__text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
}

/* ==========================================================================
   13. Contacts Section
   ========================================================================== */

.contacts {
    background-color: var(--color-bg-alt);
}

.contacts__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.contact-card {
    padding: var(--space-2xl);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition:
        opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
    filter: blur(3px);
}

.contact-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

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

.contact-card__badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    background-color: rgba(201, 169, 110, 0.1);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-lg);
}

.contact-card__title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-xl);
    color: var(--color-white);
}

.contact-card__info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-card__row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.contact-card__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--color-primary);
}

.contact-card__icon svg {
    width: 100%;
    height: 100%;
}

.contact-card__icon--wa {
    color: #25d366;
}

.contact-card__link {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
}

.contact-card__link:hover {
    color: #25d366;
}

.contacts__map {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.map {
    width: 100%;
    height: 450px;
    background-color: var(--color-bg-card);
}

/* ==========================================================================
   14. Footer
   ========================================================================== */

.footer {
    background-color: var(--color-bg);
    padding: var(--space-4xl) 0 var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer__logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.footer__tagline {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text-subtle);
}

.footer__heading {
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-white);
    margin-bottom: var(--space-xl);
}

.footer__nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer__nav a {
    font-size: 0.875rem;
    color: var(--color-text-subtle);
    transition: color var(--transition-fast);
}

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

.footer__nav--addresses li {
    font-size: 0.875rem;
    color: var(--color-text-subtle);
}

.footer__bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer__bottom p {
    font-size: 0.8125rem;
    color: var(--color-text-subtle);
}

/* ==========================================================================
   15. Section & Element Animations
   ========================================================================== */

/* --- Section-level reveal --- */

.section-animate {
    opacity: 0;
    transform: translateY(80px);
    filter: blur(4px);
    transition:
        opacity 1.3s cubic-bezier(0.22, 1, 0.36, 1),
        transform 1.3s cubic-bezier(0.22, 1, 0.36, 1),
        filter 1.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.section-animate.section-visible {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

/* Stagger child headings and descriptions inside revealed sections */
.section-animate .section-header {
    opacity: 0;
    transform: translateY(40px);
    filter: blur(3px);
    transition:
        opacity 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
        transform 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
        filter 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s;
}

.section-animate.section-visible .section-header {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

/* About text block slide */
.section-animate .about__text {
    opacity: 0;
    transform: translateX(-60px);
    filter: blur(3px);
    transition:
        opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s,
        transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s,
        filter 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s;
}

.section-animate.section-visible .about__text {
    opacity: 1;
    transform: translateX(0);
    filter: blur(0);
}

/* About stats slide from right */
.section-animate .about__stats {
    opacity: 0;
    transform: translateX(60px);
    filter: blur(3px);
    transition:
        opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.35s,
        transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.35s,
        filter 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.35s;
}

.section-animate.section-visible .about__stats {
    opacity: 1;
    transform: translateX(0);
    filter: blur(0);
}

/* Brands card scale-in */
.section-animate .brands__card {
    opacity: 0;
    transform: scale(0.85);
    filter: blur(4px);
    transition:
        opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s,
        transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s,
        filter 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.25s;
}

.section-animate.section-visible .brands__card {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
}

/* Brands info slide from left */
.section-animate .brands__info {
    opacity: 0;
    transform: translateX(-60px);
    filter: blur(3px);
    transition:
        opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
        transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
        filter 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s;
}

.section-animate.section-visible .brands__info {
    opacity: 1;
    transform: translateX(0);
    filter: blur(0);
}

/* CTA content zoom-in */
.section-animate .cta__content {
    opacity: 0;
    transform: scale(0.92) translateY(30px);
    filter: blur(3px);
    transition:
        opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
        transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s,
        filter 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s;
}

.section-animate.section-visible .cta__content {
    opacity: 1;
    transform: scale(1) translateY(0);
    filter: blur(0);
}

/* Map slide up */
.section-animate .contacts__map {
    opacity: 0;
    transform: translateY(50px);
    filter: blur(3px);
    transition:
        opacity 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.35s,
        transform 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.35s,
        filter 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.35s;
}

.section-animate.section-visible .contacts__map {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

/* --- Hero entrance animations --- */

.hero__content {
    animation: heroFadeUp 1.4s cubic-bezier(0.22, 1, 0.36, 1) 0.3s both;
}

.hero__visual {
    animation: heroFadeUp 1.4s cubic-bezier(0.22, 1, 0.36, 1) 0.55s both;
}

.hero__scroll {
    animation: heroFadeUp 1.4s cubic-bezier(0.22, 1, 0.36, 1) 0.85s both;
}

@keyframes heroFadeUp {
    from {
        opacity: 0;
        transform: translateY(50px);
        filter: blur(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

/* --- Floating icon --- */

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* --- Scroll indicator --- */

@keyframes scrollLine {
    0% {
        opacity: 0;
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        opacity: 1;
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform-origin: bottom;
    }
    100% {
        opacity: 0;
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* --- Element-level stagger delays --- */

.service-card:nth-child(1) { transition-delay: 0.08s; }
.service-card:nth-child(2) { transition-delay: 0.18s; }
.service-card:nth-child(3) { transition-delay: 0.28s; }
.service-card:nth-child(4) { transition-delay: 0.38s; }
.service-card:nth-child(5) { transition-delay: 0.48s; }
.service-card:nth-child(6) { transition-delay: 0.58s; }

.advantage:nth-child(1) { transition-delay: 0.08s; }
.advantage:nth-child(2) { transition-delay: 0.18s; }
.advantage:nth-child(3) { transition-delay: 0.28s; }
.advantage:nth-child(4) { transition-delay: 0.38s; }
.advantage:nth-child(5) { transition-delay: 0.48s; }
.advantage:nth-child(6) { transition-delay: 0.58s; }

.stat:nth-child(1) { transition-delay: 0.1s; }
.stat:nth-child(2) { transition-delay: 0.2s; }
.stat:nth-child(3) { transition-delay: 0.3s; }
.stat:nth-child(4) { transition-delay: 0.4s; }

.brands__feature:nth-child(1) { transition-delay: 0.1s; }
.brands__feature:nth-child(2) { transition-delay: 0.25s; }
.brands__feature:nth-child(3) { transition-delay: 0.4s; }

.contact-card:nth-child(1) { transition-delay: 0.1s; }
.contact-card:nth-child(2) { transition-delay: 0.25s; }

/* ==========================================================================
   16. Media Queries
   ========================================================================== */

/* Tablet landscape & smaller (<=1024px) */
@media (max-width: 1024px) {
    :root {
        --space-5xl: 6rem;
    }

    /* Hero: single column, centered */
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__visual {
        display: none;
    }

    /* About: stack vertically */
    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    /* Brands: stack, card on top */
    .brands__layout {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .brands__visual {
        order: -1;
    }

    .brands__card {
        margin: 0 auto;
    }

    /* Animation: switch horizontal slides to vertical on stacked layout */
    .section-animate .about__text,
    .section-animate .about__stats,
    .section-animate .brands__info {
        transform: translateY(40px);
    }

    .brands__feature {
        transform: translateY(20px);
    }
}

/* Tablet portrait & smaller (<=768px) */
@media (max-width: 768px) {
    :root {
        --space-5xl: 4rem;
        --container-padding: 1.25rem;
    }

    /* Navigation: fullscreen overlay menu */
    .nav__menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-2xl);
        padding: var(--space-3xl);
    }

    .nav__menu--open {
        display: flex;
    }

    .nav__link {
        font-size: 1.25rem;
    }

    .nav__toggle {
        display: flex;
        z-index: 1001;
    }

    /* Hero title sizing */
    .hero__title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    /* Map */
    .map {
        height: 350px;
    }

    /* Footer: tighter gap */
    .footer__grid {
        gap: var(--space-2xl);
    }
}

/* Mobile (<=480px) */
@media (max-width: 480px) {
    :root {
        --space-5xl: 3rem;
        --container-padding: 1rem;
    }

    /* Hero */
    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 0.6875rem;
    }

    .hero__description {
        font-size: 1rem;
    }

    .hero__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    /* Typography */
    .section-title {
        font-size: 1.75rem;
    }

    /* Cards: tighter padding */
    .service-card {
        padding: var(--space-xl);
    }

    .advantage {
        padding: var(--space-xl);
    }

    .advantage__number {
        font-size: 2.5rem;
    }

    .stat {
        padding: var(--space-lg);
    }

    .stat__number {
        font-size: 2rem;
    }

    .brands__card {
        padding: var(--space-2xl);
    }

    .brands__essilor-text {
        font-size: 2.25rem;
    }

    .contact-card {
        padding: var(--space-xl);
    }

    /* Map */
    .map {
        height: 280px;
    }

    /* Hide scroll indicator */
    .hero__scroll {
        display: none;
    }

    /* Reduce animation amplitudes */
    .section-animate {
        transform: translateY(50px);
    }

    .section-animate .section-header {
        transform: translateY(25px);
    }

    .section-animate .about__text,
    .section-animate .about__stats,
    .section-animate .brands__info {
        transform: translateY(30px);
    }

    .section-animate .brands__card {
        transform: scale(0.95);
    }

    .section-animate .cta__content {
        transform: scale(0.95) translateY(20px);
    }

    .section-animate .contacts__map {
        transform: translateY(30px);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .service-card,
    .advantage,
    .contact-card,
    .brands__feature,
    .stat,
    .section-animate,
    .section-animate .section-header,
    .section-animate .about__text,
    .section-animate .about__stats,
    .section-animate .brands__card,
    .section-animate .brands__info,
    .section-animate .cta__content,
    .section-animate .contacts__map {
        opacity: 1;
        transform: none;
        filter: none;
    }
}

/* Print styles */
@media print {
    .nav,
    .hero__scroll,
    .hero__visual,
    .contacts__map,
    .cta {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    h1, h2, h3, h4, h5, h6 {
        color: black;
    }

    .section-label {
        color: #666;
    }

    a {
        color: black;
    }
}