/* ═══════════════════════════════════════════════════════
   КРОСАР — Main Stylesheet
   Российский производитель интроскопов
   ═══════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties (Design Tokens) ─── */
:root {
    /* Colors — Light Corporate */
    --color-bg: #f8fafc;
    --color-bg-card: #ffffff;
    --color-bg-glass: rgba(255, 255, 255, 0.92);
    --color-surface: #f1f5f9;
    --color-surface-2: #e8eef6;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;

    --color-text: #334155;
    --color-text-muted: #64748b;
    --color-text-heading: #0f2a4a;

    --color-primary: #1e4d8c;
    --color-primary-light: #2563eb;
    --color-primary-glow: rgba(30, 77, 140, 0.12);
    --color-primary-bright: #1e4d8c;

    --color-accent: #c0392b;
    --color-accent-light: #dc2626;
    --color-accent-glow: rgba(192, 57, 43, 0.1);

    --color-rf: #c0392b;

    --color-gradient-start: #1e4d8c;
    --color-gradient-end: #2563eb;
    --color-gradient-accent: #c0392b;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.8rem;
    --font-size-sm: 0.9375rem;
    --font-size-base: 1.0625rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.375rem;
    --font-size-2xl: 1.625rem;
    --font-size-3xl: 2.25rem;
    --font-size-4xl: 2.875rem;
    --font-size-5xl: 3.75rem;

    /* Spacing */
    --space-xs: 0.375rem;
    --space-sm: 0.625rem;
    --space-md: 1.125rem;
    --space-lg: 1.75rem;
    --space-xl: 2.5rem;
    --space-2xl: 3.75rem;
    --space-3xl: 5rem;
    --space-4xl: 7.5rem;

    /* Layout */
    --container-max: 1280px;
    --container-padding: 2rem;
    --border-radius: 14px;
    --border-radius-lg: 22px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.75;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

table {
    border-collapse: collapse;
    width: 100%;
}

/* ─── Container ─── */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ─── Navigation ─── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-width: 100vw;
    z-index: 1000;
    background: var(--color-bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-base);
    box-sizing: border-box;
}

.nav__box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 78px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav__logo-text {
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--color-text-heading);
    letter-spacing: 0.04em;
}

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

.nav__logo-sub {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.03em;
    line-height: 1.2;
    border-left: 2px solid var(--color-border-hover);
    padding-left: 10px;
}

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

.nav__list li a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--space-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
    white-space: nowrap;
}

.nav__list li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-light);
    border-radius: 1px;
    transition: width var(--transition-base);
}

.nav__list li a:hover,
.nav__list li.active a {
    color: var(--color-text-heading);
}

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

.nav__cta {
    background: var(--color-accent);
    color: #fff !important;
    padding: 8px 18px !important;
    border-radius: var(--border-radius);
    font-weight: 600 !important;
    transition: all var(--transition-base) !important;
}

.nav__cta::after {
    display: none !important;
}

.nav__cta:hover {
    background: var(--color-accent-light) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* ─── Hamburger Menu Button ─── */
.menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    cursor: pointer;
    z-index: 1001;
}

.menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.menu-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ─── Mobile Menu ─── */
.mobile-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: center;
}

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

.mobile-menu ul {
    text-align: center;
}

.mobile-menu ul li {
    margin-bottom: var(--space-xl);
}

.mobile-menu ul li a {
    color: var(--color-text-muted);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    transition: color var(--transition-fast);
}

.mobile-menu ul li a:hover,
.mobile-menu ul li.active a {
    color: var(--color-text-heading);
}

/* ─── Hero Section ─── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 68px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -10%;
    width: 55%;
    height: 70%;
    background: radial-gradient(ellipse, var(--color-primary-glow) 0%, transparent 65%);
    filter: blur(60px);
    pointer-events: none;
    animation: float-glow 10s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -5%;
    width: 40%;
    height: 50%;
    background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 65%);
    filter: blur(80px);
    pointer-events: none;
    animation: float-glow 10s ease-in-out infinite reverse;
}

@keyframes float-glow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20px, -15px); }
}

.hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
    padding: var(--space-4xl) 0;
}

.hero__content {
    position: relative;
    z-index: 1;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 6px 14px;
    background: rgba(192, 57, 43, 0.12);
    border: 1px solid rgba(192, 57, 43, 0.3);
    border-radius: 100px;
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-accent-light);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-xl);
    animation: fade-in-up 0.6s ease-out;
}

.hero__badge-flag {
    font-size: 1rem;
}

.hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
    animation: fade-in-up 0.6s ease-out 0.1s both;
    line-height: 1.15;
}

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

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--color-primary-bright), #7ec8f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    line-height: 1.75;
    margin-bottom: var(--space-2xl);
    max-width: 520px;
    animation: fade-in-up 0.6s ease-out 0.2s both;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    animation: fade-in-up 0.6s ease-out 0.3s both;
}

.hero__trust {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
    animation: fade-in-up 0.6s ease-out 0.4s both;
}

.hero__trust-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.hero__trust-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-text-heading);
}

.hero__trust-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Hero Illustration ─── */
.hero__visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: fade-in-up 0.8s ease-out 0.2s both;
}

.hero__device {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 16/10;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(30,77,140,0.12), 0 0 0 1px var(--color-border);
}

.hero__device::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(135deg, rgba(30,77,140,0.15) 0%, transparent 50%),
        linear-gradient(225deg, rgba(192,57,43,0.1) 0%, transparent 50%);
}

.hero__device-tunnel {
    width: 78%;
    height: 55%;
    background: #1e2940;
    border-radius: 8px;
    border: 3px solid rgba(74,144,217,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 0 30px rgba(74,144,217,0.2) inset;
}

.hero__device-tunnel::before {
    content: '';
    position: absolute;
    inset: 8px;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 6px,
            rgba(74,144,217,0.04) 6px,
            rgba(74,144,217,0.04) 7px
        );
}

.hero__device-scan {
    position: absolute;
    left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary-bright), transparent);
    animation: scan-line 3s ease-in-out infinite;
    box-shadow: 0 0 12px var(--color-primary-bright);
}

@keyframes scan-line {
    0% { top: 0; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.hero__device-label {
    position: absolute;
    bottom: 12px;
    right: 14px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--color-primary-bright);
    text-transform: uppercase;
    opacity: 0.7;
}

.hero__device-specs {
    position: absolute;
    top: 12px;
    left: 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hero__device-spec {
    font-size: 0.6rem;
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 13px 26px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(192, 57, 43, 0.35);
}

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(192, 57, 43, 0.45);
    color: #fff;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: #fff;
    box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-primary-glow);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-border-hover);
    background: var(--color-surface);
    color: var(--color-text-heading);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 9px 18px;
    font-size: var(--font-size-xs);
}

/* ─── Section Base ─── */
.section {
    padding: var(--space-4xl) 0;
}

.section + .section {
    padding-top: 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section__header .label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent-light);
    margin-bottom: var(--space-sm);
}

.section__header h2 {
    font-size: var(--font-size-4xl);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.section__header p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    max-width: 640px;
    margin: 0 auto;
}

/* ─── Feature Cards (Why КРОСАР) ─── */
.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl) var(--space-2xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.feature-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(30, 77, 140, 0.12);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card__icon {
    width: 62px;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 77, 140, 0.08);
    border: 1px solid rgba(30, 77, 140, 0.2);
    border-radius: 16px;
    margin-bottom: var(--space-lg);
    font-size: 1.75rem;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    font-weight: 700;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    line-height: 1.8;
}

/* ─── Series Cards ─── */
.series__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.series-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.series-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(30, 77, 140, 0.12);
}

.series-card__badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-lg);
    width: fit-content;
}

.series-card__badge--base {
    background: rgba(30, 77, 140, 0.15);
    border: 1px solid rgba(30, 77, 140, 0.35);
    color: var(--color-primary-bright);
}

.series-card__badge--dual {
    background: rgba(41, 128, 185, 0.15);
    border: 1px solid rgba(41, 128, 185, 0.35);
    color: #7ec8f7;
}

.series-card__badge--smart {
    background: rgba(192, 57, 43, 0.12);
    border: 1px solid rgba(192, 57, 43, 0.3);
    color: var(--color-accent-light);
}

.series-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-sm);
}

.series-card__desc {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    flex: 1;
}

.series-card__models {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--space-xl);
}

.series-card__model-tag {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 3px 10px;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

.series-card__features {
    list-style: none;
    padding: 0;
    margin-bottom: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.series-card__features li {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding-left: 1.25rem;
    position: relative;
}

.series-card__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary-bright);
    font-weight: 700;
    font-size: 0.75rem;
}

/* ─── Stats Section ─── */
.stats {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    text-align: center;
    padding: var(--space-2xl) 0;
}

.stat-item__number {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-bright), #7ec8f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
    line-height: 1;
}

.stat-item__label {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

/* ─── Applications Section ─── */
.applications__grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-md);
}

.app-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl) var(--space-md);
    text-align: center;
    transition: all var(--transition-base);
    cursor: default;
}

.app-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    background: var(--color-surface);
}

.app-card__icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: block;
}

.app-card__label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    line-height: 1.4;
}

/* ─── CTA Section ─── */
.cta {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
}

.cta__content {
    position: relative;
    z-index: 1;
    max-width: 680px;
    margin: 0 auto;
}

.cta__content h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
}

.cta__content p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-2xl);
}

.cta__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ─── RF Badge (Российская разработка) ─── */
.rf-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(192, 57, 43, 0.08);
    border: 1px solid rgba(192, 57, 43, 0.25);
    border-radius: 8px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-accent-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.rf-badge::before {
    content: '🇷🇺';
    font-size: 1rem;
}

/* ─── Page Header (inner pages) ─── */
.page-header {
    padding-top: calc(68px + var(--space-4xl));
    padding-bottom: var(--space-3xl);
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 400px;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    pointer-events: none;
}

.page-header__label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent-light);
    margin-bottom: var(--space-md);
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-size: var(--font-size-4xl);
    position: relative;
    z-index: 1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.page-header p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    max-width: 640px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* ─── Breadcrumb ─── */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-md) 0;
    flex-wrap: wrap;
}

.breadcrumb a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.breadcrumb__sep {
    color: var(--color-text-muted);
    opacity: 0.4;
    font-size: var(--font-size-sm);
}

.breadcrumb__current {
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

/* ─── Catalog ─── */
.catalog-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-3xl);
    flex-wrap: wrap;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-md);
}

.catalog-tab {
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    border: 1px solid transparent;
    background: none;
    font-family: var(--font-family);
    outline: none;
    white-space: nowrap;
}

.catalog-tab:hover {
    color: var(--color-text-heading);
    background: var(--color-surface);
}

.catalog-tab.active {
    color: var(--color-text-heading);
    background: var(--color-surface);
    border-color: var(--color-border-hover);
}

.catalog__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

/* ─── Model Card ─── */
.model-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.model-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}

.model-card__image {
    aspect-ratio: 16/9;
    background: var(--color-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

.model-card__placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    position: relative;
    padding: 0 !important;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(30,77,140,0.06) 100%);
}

/* Скрываем фото — они появятся позже */
.model-card__placeholder img {
    display: none !important;
}

/* Иконка фотоаппарата */
.model-card__placeholder::before {
    content: '📷';
    font-size: 2.2rem;
    opacity: 0.35;
    display: block;
    margin-bottom: 10px;
}

/* Текст-заглушка */
.model-card__placeholder::after {
    content: 'Скоро появится фотография';
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-align: center;
    opacity: 0.6;
    padding: 0 var(--space-md);
}

.model-card__tunnel-svg {
    width: 75%;
    opacity: 0.25;
}

.model-card__article {
    position: absolute;
    bottom: 10px;
    right: 10px;
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    font-family: 'Courier New', monospace;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    padding: 3px 10px;
    border-radius: 6px;
    box-shadow: 0 1px 6px rgba(0,0,0,0.15);
}

.model-card__series {
    position: absolute;
    top: 10px;
    left: 12px;
}

.model-card__body {
    padding: var(--space-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.model-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
}

.model-card__desc {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    flex: 1;
}

.model-card__specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: var(--space-lg);
}

.model-spec {
    background: var(--color-surface);
    border-radius: 8px;
    padding: 8px 12px;
}

.model-spec__label {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.model-spec__value {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-heading);
    font-family: 'Courier New', monospace;
}

/* ─── Model Detail Page ─── */
.model-detail {
    padding-top: calc(68px + var(--space-2xl));
}

.model-detail__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
    margin-bottom: var(--space-4xl);
}

.model-detail__image {
    aspect-ratio: 4/3;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.model-detail__image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    width: 100%;
    height: 100%;
}

.model-detail__image-placeholder svg {
    width: 60%;
    opacity: 0.15;
}

.model-detail__image-placeholder span {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.model-detail__info h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.model-detail__article {
    display: inline-block;
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    color: var(--color-primary-bright);
    background: rgba(30, 77, 140, 0.1);
    border: 1px solid rgba(30, 77, 140, 0.2);
    padding: 4px 12px;
    border-radius: 6px;
    margin-bottom: var(--space-xl);
}

.model-detail__desc {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

.model-detail__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

/* ─── Specs Table ─── */
.specs-table {
    width: 100%;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.specs-table tr:nth-child(odd) {
    background: var(--color-bg-card);
}

.specs-table tr:nth-child(even) {
    background: var(--color-surface);
}

.specs-table td {
    padding: 12px 18px;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.specs-table td:first-child {
    color: var(--color-text-muted);
    width: 45%;
}

.specs-table td:last-child {
    color: var(--color-text-heading);
    font-weight: 600;
}

/* ─── Options List ─── */
.options-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.options-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

.options-list li::before {
    content: '▸';
    color: var(--color-primary-bright);
    font-size: 0.85rem;
    margin-top: 2px;
    flex-shrink: 0;
}

/* ─── RF Block ─── */
.rf-block {
    background: linear-gradient(135deg, rgba(30,77,140,0.08), rgba(192,57,43,0.05));
    border: 1px solid rgba(192, 57, 43, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl);
    display: flex;
    gap: var(--space-xl);
    align-items: flex-start;
}

.rf-block__flag {
    font-size: 3rem;
    flex-shrink: 0;
    line-height: 1;
}

.rf-block__content h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-text-heading);
}

.rf-block__content p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ─── Content Block (about/tech/service pages) ─── */
.content-block {
    max-width: 860px;
    margin: 0 auto;
    padding-bottom: var(--space-3xl);
}

.content-block h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-lg);
    padding-top: var(--space-xl);
    letter-spacing: -0.01em;
}

.content-block h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    padding-top: var(--space-lg);
    color: var(--color-primary-bright);
}

.content-block p {
    color: var(--color-text-muted);
    line-height: 1.85;
    margin-bottom: var(--space-md);
}

.content-block ul {
    list-style: none;
    padding: 0;
}

.content-block ul li {
    position: relative;
    padding-left: var(--space-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text-muted);
    line-height: 1.7;
    font-size: var(--font-size-sm);
}

.content-block ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-light);
    font-weight: 700;
}

/* ─── Info Cards (goszakupki, tech, service) ─── */
.info-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.info-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl);
}

.info-card__icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
}

.info-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

.info-card p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ─── Contact Form ─── */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.contact__info h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-lg);
}

.contact__info p {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.contact__item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact__item-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.contact__item-text span {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 2px;
}

.contact__item-text a,
.contact__item-text p {
    color: var(--color-text-heading);
    font-weight: 500;
}

.contact__form {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl);
}

.contact__form h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 13px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
    outline: none;
    appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

.form-note {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

/* ─── Consent checkbox ─── */
.form-group--consent {
    margin-top: var(--space-md);
}

.consent-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    line-height: 1.5;
}

.consent-label input[type="checkbox"] {
    flex-shrink: 0;
    margin-top: 2px;
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.consent-label a {
    color: var(--color-primary-light);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.consent-label a:hover {
    color: var(--color-accent-light);
}

/* ─── Privacy Policy page ─── */
.privacy-content {
    max-width: 820px;
    margin: 0 auto;
}

.privacy-content h2 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

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

.privacy-content p {
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.privacy-content ul {
    list-style: disc;
    padding-left: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--color-text);
    line-height: 1.8;
}

.privacy-content ul li {
    margin-bottom: var(--space-xs);
}

.privacy-content a {
    color: var(--color-primary-light);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.privacy-date {
    margin-top: var(--space-2xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ─── Footer ─── */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__box {
    display: grid;
    grid-template-columns: 2.5fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer__brand .footer__logo-text {
    font-size: var(--font-size-xl);
    font-weight: 900;
    color: var(--color-text-heading);
    letter-spacing: 0.04em;
    display: block;
    margin-bottom: 4px;
}

.footer__brand .footer__logo-text span {
    color: var(--color-accent-light);
}

.footer__tagline {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: var(--space-lg);
}

.footer__rf {
    margin-bottom: var(--space-lg);
}

.footer__col-title {
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-heading);
    margin-bottom: var(--space-lg);
}

.footer__nav ul li {
    margin-bottom: var(--space-sm);
}

.footer__nav ul li a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__nav ul li a:hover {
    color: var(--color-text-heading);
}

.footer__contacts p {
    margin-bottom: var(--space-sm);
}

.footer__contacts a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

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

.footer__bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer__bottom p {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.footer__cert {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ─── 404 Page ─── */
.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.error-page h1 {
    font-size: 8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-bright), var(--color-accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-md);
}

.error-page p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-xl);
}

/* ─── Related Models ─── */
.related__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

/* ─── Responsive ─── */
@media (max-width: 1100px) {
    .features__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .footer__box {
        grid-template-columns: 1fr 1fr 1fr;
    }
    .applications__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-2xl);
    }
    .hero__inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero__visual {
        display: none;
    }
    .hero p {
        max-width: 100%;
    }
    .hero__actions {
        justify-content: center;
    }
    .hero__trust {
        justify-content: center;
    }
    .catalog__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .related__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .model-detail__grid {
        grid-template-columns: 1fr;
    }
    .contact__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
    }

    .nav__list {
        display: none;
    }

    .menu-btn {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding-top: calc(68px + var(--space-2xl));
        padding-bottom: var(--space-2xl);
    }

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

    .hero__trust {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }

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

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

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

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

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

    .applications__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .info-cards {
        grid-template-columns: 1fr;
    }

    .footer__box {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

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

@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.875rem;
        --font-size-4xl: 1.625rem;
        --container-padding: 1rem;
    }

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

    .applications__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}