/* ============================================
   ПРОТОФЛЕКС-СИБИРЬ — Premium Design System
   ============================================ */

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

:root {
    /* Brand */
    --navy: #0B1120;
    --navy-mid: #111827;
    --navy-light: #1E293B;
    --slate: #334155;
    --slate-light: #64748B;

    /* Accent */
    --accent: #F59E0B;
    --accent-hover: #D97706;
    --accent-glow: rgba(245, 158, 11, 0.15);

    /* Frost */
    --frost: #38BDF8;
    --frost-deep: #0EA5E9;
    --frost-glow: rgba(56, 189, 248, 0.12);
    --frost-pale: #E0F2FE;

    /* Neutral */
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    --text: #0F172A;
    --text-muted: #64748B;

    /* System */
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --radius-full: 9999px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --duration: 0.4s;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow: 0 4px 16px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
    --shadow-xl: 0 32px 80px rgba(0,0,0,0.12);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.section { padding: 120px 0; }

/* --- TYPOGRAPHY --- */
.h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text);
}
.h2--light { color: var(--white); }
.h2--frost {
    background: linear-gradient(135deg, var(--frost) 0%, #7DD3FC 50%, var(--white) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.overline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--frost-deep);
    margin-bottom: 16px;
}
.overline::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--frost-deep);
    border-radius: 2px;
}
.overline--light { color: var(--frost); }
.overline--light::before { background: var(--frost); }

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    transition: all var(--duration) var(--ease);
    position: relative;
    overflow: hidden;
}

.btn--accent {
    background: var(--accent);
    color: var(--navy);
}
.btn--accent:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(245, 158, 11, 0.25);
}

.btn--ghost {
    background: rgba(255,255,255,0.06);
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(8px);
}
.btn--ghost:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.25);
}

.btn--outline-dark {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--gray-200);
}
.btn--outline-dark:hover {
    border-color: var(--gray-400);
    background: var(--gray-50);
}

.btn--sm { padding: 10px 24px; font-size: 0.813rem; }
.btn--lg { padding: 18px 40px; font-size: 0.938rem; }
.btn--full { width: 100%; }

/* --- HEADER --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: all var(--duration) var(--ease);
}
.header.scrolled {
    background: rgba(11, 17, 32, 0.92);
    backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.header__inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo__mark { width: 40px; height: 40px; }
.logo__mark--sm { width: 32px; height: 32px; }

.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name {
    font-size: 1rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: 0.08em;
}
.logo__region {
    font-size: 0.625rem;
    font-weight: 700;
    color: var(--frost);
    letter-spacing: 0.25em;
    margin-top: 2px;
}

.nav { display: flex; gap: 32px; }
.nav__link {
    font-size: 0.813rem;
    font-weight: 500;
    color: rgba(255,255,255,0.55);
    transition: color var(--duration) var(--ease);
    position: relative;
}
.nav__link:hover { color: var(--white); }
.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--frost);
    transition: width var(--duration) var(--ease);
    border-radius: 1px;
}
.nav__link:hover::after { width: 100%; }

.header__right { display: flex; align-items: center; gap: 24px; }

.header__phone {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    line-height: 1.2;
}
.header__phone-label {
    font-size: 0.688rem;
    color: rgba(255,255,255,0.35);
    font-weight: 500;
}
.header__phone-number {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--white);
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.02em;
}
.header__phone:hover .header__phone-number { color: var(--frost); }

.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    padding: 8px;
    width: 40px;
}
.burger__line {
    display: block;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--duration) var(--ease);
}
.burger__line:first-child { width: 100%; }
.burger__line:last-child { width: 60%; }
.burger.active .burger__line:first-child { transform: rotate(45deg) translate(3px, 3px); }
.burger.active .burger__line:last-child { transform: rotate(-45deg) translate(3px, -3px); width: 100%; }

/* --- HERO --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--navy);
    overflow: hidden;
}

.hero__canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        radial-gradient(ellipse 60% 50% at 70% 40%, rgba(56, 189, 248, 0.06) 0%, transparent 100%),
        radial-gradient(ellipse 40% 60% at 20% 80%, rgba(245, 158, 11, 0.04) 0%, transparent 100%),
        linear-gradient(180deg, rgba(11,17,32,0) 0%, rgba(11,17,32,0.5) 100%);
}

.hero__inner {
    position: relative;
    z-index: 2;
    max-width: 1400px;
    margin: 0 auto;
    padding: 140px 40px 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero__eyebrow {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeIn 0.8s var(--ease) 0.2s forwards;
}
.hero__eyebrow-line {
    width: 40px;
    height: 1px;
    background: var(--frost);
}
.hero__eyebrow span {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--frost);
}

.hero__title {
    margin-bottom: 28px;
}
.hero__title-line {
    display: block;
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--white);
    opacity: 0;
    transform: translateY(40px);
    animation: slideUp 0.8s var(--ease) forwards;
}
.hero__title-line:nth-child(1) { animation-delay: 0.3s; }
.hero__title-line:nth-child(2) { animation-delay: 0.4s; }
.hero__title-line:nth-child(3) { animation-delay: 0.5s; }
.hero__title-line:nth-child(4) { animation-delay: 0.6s; }

.hero__title-line--accent {
    background: linear-gradient(90deg, var(--frost) 0%, #7DD3FC 40%, var(--white) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__desc {
    font-size: 1.063rem;
    line-height: 1.75;
    color: rgba(255,255,255,0.5);
    max-width: 480px;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeIn 0.8s var(--ease) 0.7s forwards;
}
.hero__desc strong {
    color: var(--frost);
    font-weight: 700;
}

.hero__actions {
    display: flex;
    gap: 16px;
    opacity: 0;
    animation: fadeIn 0.8s var(--ease) 0.8s forwards;
}

/* Temperature Display */
.hero__right {
    display: flex;
    justify-content: center;
    opacity: 0;
    animation: fadeIn 1s var(--ease) 0.6s forwards;
}

.temp-display { text-align: center; }

.temp-display__ring {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto 40px;
}

.temp-display__svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.temp-display__arc {
    stroke-dashoffset: 565;
    animation: drawArc 2s var(--ease) 1s forwards;
}

@keyframes drawArc {
    to { stroke-dashoffset: 140; }
}

.temp-display__center {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.temp-display__num {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.temp-display__value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 4rem;
    font-weight: 700;
    color: var(--frost);
    line-height: 1;
    letter-spacing: -0.02em;
}

.temp-display__unit {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    color: rgba(255,255,255,0.4);
}

.temp-display__label {
    font-size: 0.688rem;
    color: rgba(255,255,255,0.3);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 8px;
    line-height: 1.4;
}

.temp-display__specs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: center;
}

.temp-spec { text-align: center; }
.temp-spec__val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    display: block;
    line-height: 1;
}
.temp-spec__unit {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
}
.temp-spec__label {
    font-size: 0.688rem;
    color: rgba(255,255,255,0.3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
    display: block;
    min-height: 2em;
}

/* Hero Bottom */
.hero__bottom {
    position: relative;
    z-index: 2;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px 40px;
}

.hero__clients {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.06);
    opacity: 0;
    animation: fadeIn 0.8s var(--ease) 1s forwards;
}

.hero__clients-label {
    font-size: 0.813rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.4);
    white-space: nowrap;
}

.hero__clients-list {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 1rem;
    color: rgba(255,255,255,0.6);
    font-weight: 600;
    flex-wrap: wrap;
}

.hero__clients-item {
    font-size: 1rem;
}

.hero__clients-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    flex-shrink: 0;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- SECTION HEAD --- */
.section__head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 40px;
    margin-bottom: 64px;
}
.section__head--center {
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.section__head-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 520px;
    margin-top: 12px;
}

/* --- CATALOG --- */
.catalog { background: var(--gray-50); }

.catalog__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.product-card {
    display: flex;
    flex-direction: column;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: all var(--duration) var(--ease);
    position: relative;
}
.product-card:hover {
    border-color: transparent;
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.product-card__visual {
    position: relative;
    height: 320px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.product-card__visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(255,255,255,0.8) 100%);
}

.product-card__placeholder { color: var(--gray-300); z-index: 1; }

.product-card__img-wrap {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.product-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}
.product-card:hover .product-card__img { transform: scale(1.04); }

.product-card__badge {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 2;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}
.product-card__badge--frost {
    background: linear-gradient(135deg, rgba(56,189,248,0.15) 0%, rgba(14,165,233,0.15) 100%);
    color: var(--frost-deep);
    border: 1px solid rgba(56,189,248,0.2);
    backdrop-filter: blur(8px);
}

.product-card__body { padding: 28px; flex: 1; display: flex; flex-direction: column; }

.product-card__type {
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--frost-deep);
    margin-bottom: 8px;
}

.product-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.product-card__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 20px;
    flex: 1;
}

.product-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
}

.tag {
    padding: 5px 12px;
    border-radius: var(--radius-full);
    font-size: 0.688rem;
    font-weight: 600;
    background: var(--gray-100);
    color: var(--gray-600);
    letter-spacing: 0.02em;
}
.tag--frost {
    background: var(--frost-pale);
    color: var(--frost-deep);
}

.product-card__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.813rem;
    font-weight: 600;
    color: var(--accent);
    transition: gap var(--duration) var(--ease);
}
.product-card:hover .product-card__link { gap: 14px; }

/* --- TEMP SCALE BANNER --- */
.temp-banner {
    padding: 48px 0;
    background: var(--navy);
    border-top: 1px solid rgba(255,255,255,0.04);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.temp-banner__inner {
    text-align: center;
}

.temp-banner__title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(255,255,255,0.35);
    margin-bottom: 32px;
}

.temp-banner__scale {
    display: flex;
    align-items: center;
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.temp-banner__label {
    flex-shrink: 0;
    text-align: center;
    min-width: 100px;
}

.temp-banner__label-value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.temp-banner__label--cold .temp-banner__label-value { color: var(--frost); }
.temp-banner__label--hot .temp-banner__label-value { color: var(--accent); }

.temp-banner__label-desc {
    display: block;
    font-size: 0.688rem;
    color: rgba(255,255,255,0.3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 6px;
}

.temp-banner__bar {
    flex: 1;
    height: 12px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius-full);
    position: relative;
    overflow: visible;
}

.temp-banner__bar-fill {
    position: absolute;
    inset: 0;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--frost-deep), var(--frost), #FBBF24, var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.5s var(--ease);
}
.temp-banner__bar-fill.animated { transform: scaleX(1); }

.temp-banner__bar-zero {
    position: absolute;
    top: -28px;
    left: 28%;
    transform: translateX(-50%);
}

.temp-banner__bar-zero span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.688rem;
    font-weight: 600;
    color: rgba(255,255,255,0.4);
    position: relative;
}

.temp-banner__bar-zero span::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 6px;
    background: rgba(255,255,255,0.2);
}

/* --- FROST SECTION --- */
.frost {
    position: relative;
    background: var(--navy);
    overflow: hidden;
}

.frost__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 50% 80% at 80% 50%, rgba(56,189,248,0.07) 0%, transparent 100%),
        radial-gradient(ellipse 60% 40% at 10% 20%, rgba(14,165,233,0.05) 0%, transparent 100%);
}

.frost__grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

.frost__head {
    text-align: center;
    margin-bottom: 64px;
    position: relative;
}

.frost__subtitle {
    font-size: 1.063rem;
    color: rgba(255,255,255,0.45);
    line-height: 1.7;
    max-width: 560px;
    margin: 16px auto 0;
}

/* Temperature Scale */
.temp-scale {
    position: relative;
    margin-bottom: 64px;
}

.temp-scale__ends {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 24px;
}

.temp-scale__end {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.temp-scale__big {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.03em;
}

.temp-scale__end--cold .temp-scale__big { color: var(--frost); }
.temp-scale__end--hot .temp-scale__big { color: var(--accent); }

.temp-scale__unit {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 500;
    color: rgba(255,255,255,0.35);
}

.temp-scale__bar {
    position: relative;
}

.temp-scale__bar-track {
    height: 8px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.temp-scale__bar-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--frost-deep), var(--frost), #7DD3FC, #FBBF24, var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.8s var(--ease);
}
.temp-scale__bar-fill.animated { transform: scaleX(1); }

.temp-scale__markers {
    position: relative;
    height: 28px;
    margin-top: 12px;
}

.temp-scale__marker {
    position: absolute;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.temp-scale__marker:first-child { transform: translateX(0); }
.temp-scale__marker:last-child { transform: translateX(-100%); }

.temp-scale__marker-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
}

.temp-scale__marker span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.688rem;
    font-weight: 600;
    color: rgba(255,255,255,0.3);
}

/* Frost Specs Row */
.frost__specs {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    padding: 40px 0 0;
    border-top: 1px solid rgba(255,255,255,0.06);
    position: relative;
}

.frost__spec { text-align: center; }

.frost__spec-value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
}

.frost__spec-unit {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
}

.frost__spec-label {
    display: block;
    font-size: 0.688rem;
    color: rgba(255,255,255,0.3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 8px;
}

.frost__spec-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.08);
}

/* --- ADVANTAGES --- */
.advantages { background: var(--white); }

.adv__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.adv-card {
    padding: 36px;
    border-radius: var(--radius);
    background: var(--gray-50);
    border: 1px solid transparent;
    transition: all var(--duration) var(--ease);
    position: relative;
    overflow: hidden;
}
.adv-card:hover {
    background: var(--white);
    border-color: var(--gray-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.adv-card--wide { grid-column: span 2; }

.adv-card__number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.688rem;
    font-weight: 700;
    color: var(--gray-300);
    margin-bottom: 20px;
}

.adv-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    color: var(--gray-600);
    margin-bottom: 20px;
}
.adv-card__icon--frost {
    background: var(--frost-pale);
    color: var(--frost-deep);
}

.adv-card__title {
    font-size: 1.063rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.adv-card__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.65;
}

.adv-card--cta {
    background: var(--navy);
    display: flex;
    align-items: center;
    justify-content: center;
}
.adv-card--cta:hover {
    background: var(--navy-mid);
    border-color: transparent;
}
.adv-card--cta .adv-card__title { color: var(--white); }
.adv-card--cta .adv-card__desc { color: rgba(255,255,255,0.5); margin-bottom: 24px; }
.adv-card__cta-content { text-align: center; }

/* --- ABOUT --- */
.about { background: var(--gray-50); }

.about__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about__text {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 24px 0 32px;
}
.about__text p {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.75;
}

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

.about__stat {
    padding: 32px;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    transition: all var(--duration) var(--ease);
}
.about__stat:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.about__stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--navy);
    display: block;
    line-height: 1;
    margin-bottom: 8px;
}

.about__stat-label {
    font-size: 0.813rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* --- CERTS --- */
.certs { background: var(--white); }

.certs__row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.cert {
    padding: 32px 24px;
    border-radius: var(--radius);
    background: var(--gray-50);
    text-align: center;
    transition: all var(--duration) var(--ease);
    border: 1px solid transparent;
}
.cert:hover {
    background: var(--white);
    border-color: var(--gray-200);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.cert__icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--frost-deep);
}

.cert__title {
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.cert__desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* --- REQUEST --- */
.request { background: var(--gray-50); }

.request__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.request__desc {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.75;
    margin: 20px 0 32px;
}

.request__checks {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.request__checks li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.938rem;
    font-weight: 500;
}
.request__checks svg { color: var(--accent); flex-shrink: 0; }

/* Form */
.form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form__field { margin-bottom: 16px; }
.form__row .form__field { margin-bottom: 0; }

.form__field label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
    letter-spacing: 0.02em;
}

.form__field input,
.form__field textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-xs);
    font-size: 0.875rem;
    color: var(--text);
    background: var(--white);
    transition: all var(--duration) var(--ease);
}
.form__field input:focus,
.form__field textarea:focus {
    outline: none;
    border-color: var(--frost);
    box-shadow: 0 0 0 4px var(--frost-glow);
}
.form__field input::placeholder,
.form__field textarea::placeholder {
    color: var(--gray-400);
}
.form__field textarea { resize: vertical; min-height: 100px; }

.form__privacy {
    font-size: 0.688rem;
    color: var(--gray-400);
    text-align: center;
    margin-top: 12px;
}
.form__privacy a { color: var(--frost-deep); text-decoration: underline; }

.form__product-info {
    background: linear-gradient(135deg, var(--frost-pale) 0%, var(--gray-50) 100%);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: var(--radius-xs);
    padding: 14px 18px;
    margin-bottom: 20px;
}
.form__product-label {
    font-size: 0.688rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--frost-deep);
    margin-bottom: 4px;
}
.form__product-name {
    font-size: 0.938rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
}

/* --- CONTACTS --- */
.contacts { background: var(--white); }

.contacts__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

.contacts__grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin: 32px 0;
}

.contact-block {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-block__icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--frost-pale);
    color: var(--frost-deep);
    flex-shrink: 0;
}

.contact-block__label {
    display: block;
    font-size: 0.688rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-400);
    margin-bottom: 2px;
}

.contact-block__value {
    font-size: 0.938rem;
    font-weight: 600;
    color: var(--text);
}
a.contact-block__value:hover { color: var(--frost-deep); }

.contacts__messengers {
    display: flex;
    gap: 12px;
}

.msg-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    background: var(--gray-50);
    color: var(--gray-600);
    font-size: 0.813rem;
    font-weight: 600;
    border: 1px solid var(--gray-200);
    transition: all var(--duration) var(--ease);
}
.msg-btn:hover {
    background: var(--frost-pale);
    color: var(--frost-deep);
    border-color: rgba(56,189,248,0.2);
    transform: translateY(-1px);
}

.contacts__map {
    height: 100%;
    min-height: 420px;
}

.contacts__map-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gray-100);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--gray-400);
    font-size: 0.813rem;
    border: 1px solid var(--gray-200);
}

/* --- FOOTER --- */
.footer {
    background: var(--navy);
    padding-top: 80px;
}

.footer__main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer__tagline {
    font-size: 0.813rem;
    color: rgba(255,255,255,0.35);
    line-height: 1.65;
    margin-top: 20px;
    max-width: 280px;
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer__col-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.6);
    margin-bottom: 4px;
}
.footer__col a,
.footer__col span {
    font-size: 0.813rem;
    color: rgba(255,255,255,0.35);
    transition: color var(--duration) var(--ease);
}
.footer__col a:hover { color: var(--frost); }

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.2);
}
.footer__bottom a { color: rgba(255,255,255,0.2); }
.footer__bottom a:hover { color: var(--frost); }

/* --- MODAL --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(11,17,32,0.7);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration) var(--ease);
}
.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
    background: var(--white);
    border-radius: var(--radius);
    padding: 48px;
    max-width: 460px;
    width: 90%;
    position: relative;
    transform: translateY(24px) scale(0.96);
    transition: transform var(--duration) var(--ease);
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }

.modal__close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-50);
    border: none;
    border-radius: 50%;
    color: var(--gray-500);
    transition: all var(--duration) var(--ease);
}
.modal__close:hover { background: var(--gray-100); color: var(--text); }

.modal__title {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.modal__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 28px;
    line-height: 1.6;
}

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

/* --- SCROLL REVEAL --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .hero__inner { grid-template-columns: 1fr; gap: 60px; padding-top: 120px; }
    .hero__right { justify-content: flex-start; }
    .temp-display__ring { width: 220px; height: 220px; }
    .temp-display__value { font-size: 3rem; }
    .frost__layout { grid-template-columns: 1fr; gap: 60px; }
    .frost__specs { flex-wrap: wrap; gap: 32px; }
    .about__layout { grid-template-columns: 1fr; gap: 48px; }
    .request__layout { grid-template-columns: 1fr; gap: 48px; }
    .contacts__layout { grid-template-columns: 1fr; gap: 48px; }
    .adv__grid { grid-template-columns: repeat(2, 1fr); }
    .adv-card--wide { grid-column: span 2; }
    .certs__row { grid-template-columns: repeat(2, 1fr); }
    .footer__main { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .section { padding: 80px 0; }

    .nav, .header__right { display: none; }
    .burger { display: flex; }
    .nav.active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--navy);
        z-index: 99;
        padding: 100px 40px 40px;
        gap: 24px;
    }
    .nav.active .nav__link {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--white);
    }

    .header__inner { padding: 0 20px; height: 64px; }

    .hero__inner { padding: 100px 20px 60px; }
    .hero__title-line { font-size: clamp(2rem, 8vw, 3rem); }
    .hero__actions { flex-direction: column; }
    .hero__bottom { padding: 0 20px 24px; }
    .hero__clients { flex-direction: column; align-items: flex-start; gap: 8px; }
    .hero__clients-list { flex-wrap: wrap; gap: 8px; }

    .catalog__grid { grid-template-columns: 1fr; }
    .adv__grid { grid-template-columns: 1fr; }
    .adv-card--wide { grid-column: span 1; }
    .certs__row { grid-template-columns: 1fr 1fr; }
    .about__stats { grid-template-columns: 1fr 1fr; gap: 12px; }
    .about__stat { padding: 24px; }
    .about__stat-value { font-size: 2rem; }

    .form__row { grid-template-columns: 1fr; }
    .form { padding: 28px; }

    .frost__specs { gap: 24px; }
    .frost__spec-value { font-size: 1.25rem; }
    .temp-scale__big { font-size: 2.5rem; }

    .footer__main { grid-template-columns: 1fr; gap: 32px; }
    .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }

    .section__head { flex-direction: column; align-items: flex-start; gap: 16px; }
}

@media (max-width: 480px) {
    .hero { min-height: auto; }
    .temp-display__specs { gap: 20px; }
    .temp-spec__val { font-size: 1.25rem; }
    .certs__row { grid-template-columns: 1fr; }
    .about__stats { grid-template-columns: 1fr; }
    .modal { padding: 32px 24px; }
}