/* ═══════════════════════════════════════════════════
   КМ-ИНЖИНИРИНГ — Premium Design System
   Шрифт: Open Sans | Палитра: Молочный + Красный
   ═══════════════════════════════════════════════════ */

/* === DESIGN TOKENS === */
:root {
    /* Colors */
    --color-bg: #FAF9F6;
    --color-bg-alt: #FFF5F5;
    --color-bg-dark: #1A1A2E;
    --color-primary: #C41E24;
    --color-primary-dark: #9B1B20;
    --color-primary-light: #E8454B;
    --color-text: #2D2D2D;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-white: #FFFFFF;
    --color-border: #E8E4DF;
    --color-card-bg: #FFFFFF;
    --color-overlay: rgba(26, 26, 46, 0.7);

    /* Typography */
    --font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.25rem;

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

    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    --header-height: 100px;

    /* Effects */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 60px rgba(0, 0, 0, 0.16);
    --shadow-card-hover: 0 16px 48px rgba(196, 30, 36, 0.12);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-slider: 0.8s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    overflow-x: hidden;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

ul,
ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

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

.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-primary);
    margin: var(--space-sm) auto 0;
    border-radius: 2px;
    transition: width var(--transition-slow);
}

.section-title:hover::after {
    width: 120px;
}

/* === SCROLL REVEAL ANIMATIONS === */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* Chain delay for cards */
.reveal-chain:nth-child(1) {
    transition-delay: 0s;
}

.reveal-chain:nth-child(2) {
    transition-delay: 0.15s;
}

.reveal-chain:nth-child(3) {
    transition-delay: 0.30s;
}

.reveal-chain:nth-child(4) {
    transition-delay: 0.45s;
}

/* === KEYFRAMES === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulseGlow {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(196, 30, 36, 0.3);
    }

    50% {
        box-shadow: 0 0 0 12px rgba(196, 30, 36, 0);
    }
}

@keyframes lineGrow {
    from {
        width: 0;
    }

    to {
        width: 100%;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% center;
    }

    100% {
        background-position: 200% center;
    }
}

/* ═══════════════════════════════════════════════
   HEADER / NAVIGATION
   ═══════════════════════════════════════════════ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(250, 249, 246, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: background var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base);
}

.header.scrolled {
    background: rgba(250, 249, 246, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    gap: var(--space-lg);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    animation: fadeInDown 0.6s ease both;
}

.header__logo img {
    height: 88px;
    width: auto;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex: 1;
    justify-content: flex-end;
    white-space: nowrap;
}

.header__nav-links {
    display: flex;
    flex: 1;
    justify-content: center;
    gap: var(--space-xl);
}

.header__nav-link {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text);
    position: relative;
    padding: 4px 0;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.header__nav-link:hover::after,
.header__nav-link.active::after {
    width: 100%;
}

.header__nav-link:hover {
    color: var(--color-primary);
}

.header__phone {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 600;
    font-size: var(--font-size-base);
    color: var(--color-text);
    padding: 10px 20px;
    border: 2px solid var(--color-text);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.header__phone:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-1px);
}

.header__phone svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* Mobile burger */
.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 4px 0;
    z-index: 1001;
}

.burger__line {
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

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

.burger.active .burger__line:nth-child(2) {
    opacity: 0;
}

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

/* Mobile menu overlay */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(250, 249, 246, 0.98);
    backdrop-filter: blur(30px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-menu.active {
    display: flex;
    opacity: 1;
}

.mobile-menu a {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 2px;
}

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

/* ═══════════════════════════════════════════════
   HERO SLIDER
   ═══════════════════════════════════════════════ */

.hero {
    padding-top: calc(var(--header-height) + 20px);
    padding-bottom: var(--space-md);
    background: var(--color-bg);
}

.hero__slider {
    position: relative;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 480px;
}

.hero__slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding: var(--space-2xl) var(--space-3xl);
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: opacity var(--transition-slider);
    pointer-events: none;
}

.hero__slide.active {
    position: relative;
    opacity: 1;
    pointer-events: auto;
    z-index: 2;
    height: 100%;
}

/* Slide 1: Golden/Ochre — Комплексные поставки */
.hero__slide--1 {
    background: #C4973E;
}

/* Slide 2: Dark Charcoal — АУГП */
.hero__slide--2 {
    background: #3B3B3B;
}

/* Slide 3: Medium Gray — Видеонаблюдение */
.hero__slide--3 {
    background: #555555;
}

/* Slide 4: Light Warm Gray — СКУД */
.hero__slide--4 {
    background: #E5E2DD;
}

/* Light slide variant: dark text */
.hero__slide--light .hero__slide-subtitle {
    color: rgba(0, 0, 0, 0.65);
}

.hero__slide--light .hero__slide-title {
    color: #1A1A2E;
}

.hero__slide--light .hero__slide-btn {
    background: #1A1A2E;
    color: var(--color-white);
    border: 2px solid #1A1A2E;
}

.hero__slide--light .hero__slide-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.hero__slide-content {
    flex: 1;
    max-width: 560px;
    z-index: 2;
}

.hero__slide-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-md);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease 0.3s, transform 0.5s ease 0.3s;
}

.hero__slide.active .hero__slide-subtitle {
    opacity: 1;
    transform: translateY(0);
}

.hero__slide-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.15;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.5s ease 0.45s, transform 0.5s ease 0.45s;
}

.hero__slide.active .hero__slide-title {
    opacity: 1;
    transform: translateY(0);
}

.hero__slide-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 16px 36px;
    background: var(--color-white);
    color: var(--color-text);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease 0.6s, transform 0.5s ease 0.6s,
        background var(--transition-fast), color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.hero__slide.active .hero__slide-btn {
    opacity: 1;
    transform: translateY(0);
}

.hero__slide-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px) !important;
}

.hero__slide-image {
    position: absolute;
    right: 40px;
    top: 50%;
    transform: translateY(-50%);
    width: 380px;
    height: 380px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.6s ease 0.5s, transform 0.6s ease 0.5s;
}

.hero__slide.active .hero__slide-image {
    opacity: 1;
    transform: translateY(-50%);
}

.hero__slide-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
    animation: float 4s ease-in-out infinite;
}

/* Slider dots — BELOW the slider card */
.hero__dots {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: var(--space-lg);
    position: relative;
    z-index: 10;
}

.hero__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #D1D1D1;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    padding: 0;
    position: relative;
}

.hero__dot:hover {
    background: #999999;
    transform: scale(1.3);
}

.hero__dot.active {
    background: #555555;
    transform: scale(1.2);
}

/* Progress ring around active dot — removed */
.hero__dot::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.hero__dot.active::after {
    border-color: transparent;
}

/* Slider progress bar — hidden */
.hero__progress {
    display: none;
}

/* ═══════════════════════════════════════════════
   ADVANTAGES / WHY CHOOSE US
   ═══════════════════════════════════════════════ */

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

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.advantage-card {
    position: relative;
    padding: var(--space-xl) var(--space-md);
    text-align: center;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
    background: var(--color-white);
}

.advantage-card__icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-bg-alt);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.advantage-card:hover .advantage-card__icon {
    background: var(--color-primary);
    transform: scale(1.1);
}

.advantage-card__icon img {
    width: 60px;
    height: 60px;
    transition: filter var(--transition-base);
}

.advantage-card:hover .advantage-card__icon img {
    filter: brightness(0) invert(1);
}

.advantage-card__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    min-height: 3.2em;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.advantage-card__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Divider between cards */
.advantage-card:not(:first-child)::after {
    content: '';
    position: absolute;
    left: -1px;
    top: 20%;
    height: 60%;
    width: 1px;
    background: var(--color-border);
    transition: opacity var(--transition-base);
}

.advantage-card:hover::after {
    opacity: 0;
}

/* ═══════════════════════════════════════════════
   WORKFLOW / STEPS
   ═══════════════════════════════════════════════ */

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

.workflow__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    position: relative;
}

.workflow-step {
    position: relative;
    text-align: center;
    z-index: 1;
}

.workflow-step__number {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-white);
    background: var(--color-primary);
    border-radius: 50%;
    position: relative;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 20px rgba(196, 30, 36, 0.25);
    opacity: 0.5;
}

.workflow-step__number::after {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    opacity: 0.15;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Active step — looping highlight */
.workflow-step.wf-active .workflow-step__number {
    opacity: 1;
    transform: scale(1.15);
    box-shadow: 0 0 0 0 rgba(196, 30, 36, 0.4),
        0 8px 30px rgba(196, 30, 36, 0.5);
    animation: wf-pulse 1.5s ease-in-out infinite;
}

.workflow-step.wf-active .workflow-step__number::after {
    inset: -10px;
    opacity: 0.4;
    border-width: 2px;
}

/* Completed step (before active) */
.workflow-step.wf-done .workflow-step__number {
    opacity: 0.85;
    transform: scale(1);
    box-shadow: 0 4px 20px rgba(196, 30, 36, 0.3);
}

.workflow-step.wf-done .workflow-step__number::after {
    opacity: 0.25;
}

/* Title & text transitions */
.workflow-step__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
    opacity: 0.5;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.workflow-step__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
    max-width: 240px;
    margin: 0 auto;
    opacity: 0.4;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.workflow-step.wf-active .workflow-step__title {
    opacity: 1;
    color: var(--color-primary);
}

.workflow-step.wf-active .workflow-step__text {
    opacity: 1;
}

.workflow-step.wf-done .workflow-step__title {
    opacity: 0.75;
}

.workflow-step.wf-done .workflow-step__text {
    opacity: 0.6;
}

/* Pulse keyframe */
@keyframes wf-pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(196, 30, 36, 0.4),
            0 8px 30px rgba(196, 30, 36, 0.5);
    }

    50% {
        box-shadow: 0 0 0 12px rgba(196, 30, 36, 0),
            0 12px 40px rgba(196, 30, 36, 0.35);
    }
}

/* Connector line progress animation */
.workflow-step:not(:last-child)::before {
    content: '';
    position: absolute;
    top: 40px;
    left: calc(50% + 60px);
    right: calc(-50% - var(--space-lg) + 60px);
    height: 2px;
    background: var(--color-primary);
    opacity: 0.15;
    z-index: 0;
}

.workflow-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 40px;
    left: calc(50% + 60px);
    right: calc(-50% - var(--space-lg) + 60px);
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary) 100%);
    z-index: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fill connector when step is done */
.workflow-step.wf-done:not(:last-child)::after {
    transform: scaleX(1);
}

.workflow-step:hover .workflow-step__number {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(196, 30, 36, 0.4);
}

.workflow-step:hover .workflow-step__number::after {
    inset: -10px;
    opacity: 0.15;
}

.workflow-step.wf-active:hover .workflow-step__number {
    animation: none;
    transform: scale(1.18);
}

/* ═══════════════════════════════════════════════
   ABOUT SECTION
   ═══════════════════════════════════════════════ */

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

.about__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about__image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    margin: 0 auto;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 0 0 10px var(--color-white), 0 0 0 12px var(--color-primary);
    transition: all var(--transition-base);
}

.about__image-wrapper:hover {
    transform: scale(1.02);
}

.about__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center calc(15% + 3px);
    border-radius: 50%;
    display: block;
    transform: scale(1.3);
}

.about__label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.about__label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--color-primary);
}

.about__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.about__text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

/* ═══════════════════════════════════════════════
   PARTNERS MARQUEE
   ═══════════════════════════════════════════════ */

.partners {
    background: var(--color-white);
    overflow: hidden;
}

.partners__marquee {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: var(--space-md) 0;
}

/* Fade edges */
.partners__marquee::before,
.partners__marquee::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 120px;
    z-index: 2;
    pointer-events: none;
}

.partners__marquee::before {
    left: 0;
    background: linear-gradient(90deg, var(--color-white) 0%, transparent 100%);
}

.partners__marquee::after {
    right: 0;
    background: linear-gradient(270deg, var(--color-white) 0%, transparent 100%);
}

.partners__track {
    display: flex;
    align-items: center;
    gap: var(--space-3xl);
    animation: marquee 30s linear infinite;
    width: max-content;
}

/* Only pause on desktop (mouse), not on mobile touch */
@media (hover: hover) and (pointer: fine) {
    .partners__track:hover {
        animation-play-state: paused;
    }
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-16.666%);
    }
}

.partners__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 0.5;
    filter: grayscale(100%);
    transition: all var(--transition-base);
    cursor: default;
    padding: var(--space-sm) var(--space-lg);
}

.partners__logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

.partners__logo img {
    height: 60px;
    width: auto;
    max-width: 180px;
    object-fit: contain;
}

.partners__logo img[alt="BONTEL"],
.partners__logo img[alt="Ярпожинвест"] {
    height: 120px;
    max-width: 240px;
}

/* ═══════════════════════════════════════════════
   CONTACT FORM
   ═══════════════════════════════════════════════ */

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

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

.contact__form {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact__input-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.contact__input,
.contact__textarea {
    width: 100%;
    padding: 16px 20px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.contact__input:focus,
.contact__textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(196, 30, 36, 0.08);
}

.contact__input::placeholder,
.contact__textarea::placeholder {
    color: var(--color-text-muted);
}

.contact__textarea {
    min-height: 140px;
    resize: vertical;
}

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

/* ═══════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 16px 40px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

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

.btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(196, 30, 36, 0.35);
}

.btn--primary:active {
    transform: translateY(0);
}

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

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

.btn--white {
    background: var(--color-white);
    color: var(--color-text);
}

.btn--white:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--lg {
    padding: 18px 48px;
    font-size: var(--font-size-lg);
}

/* Button shimmer effect */
.btn--primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

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

/* ═══════════════════════════════════════════════
   CTA SECTION
   ═══════════════════════════════════════════════ */

.cta {
    position: relative;
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #16213E 100%);
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(196, 30, 36, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.cta::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(196, 30, 36, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta__inner {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.cta__text {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

/* ═══════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════ */

.footer {
    background: var(--color-bg-dark);
    padding: var(--space-2xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer__left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer__company {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-white);
}

.footer__inn {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.footer__right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-xs);
}

.footer__email {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer__copyright {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.35);
}

/* ═══════════════════════════════════════════════
   ANIMATED RED SEPARATOR
   ═══════════════════════════════════════════════ */

.separator {
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg,
            transparent,
            var(--color-primary) 20%,
            var(--color-primary) 80%,
            transparent);
    opacity: 0.3;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE DESIGN
   ═══════════════════════════════════════════════ */

@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

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

    .advantage-card:not(:first-child)::after {
        display: none;
    }

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

    .workflow-step::before,
    .workflow-step::after {
        display: none;
    }

    .hero__slide-image {
        width: 280px;
        height: 280px;
        right: 20px;
    }

    .about__inner {
        gap: var(--space-xl);
    }
}

/* Burger breakpoint — switch to hamburger before items wrap */
@media (max-width: 1100px) {
    .header__nav-links {
        display: none;
    }

    .header__phone {
        display: none;
    }

    .burger {
        display: flex;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --header-height: 90px;
    }

    /* Prevent header overflow on mobile */
    .header {
        overflow: hidden;
    }

    .header__inner {
        max-width: 100%;
        width: 100%;
        box-sizing: border-box;
        padding: 0 16px;
        gap: 8px;
        overflow: hidden;
    }

    .header__logo {
        flex-shrink: 1;
        min-width: 0;
    }

    .header__logo img {
        height: 80px;
        width: auto;
        max-width: calc(100vw - 80px);
    }

    .burger {
        flex-shrink: 0;
        margin-left: auto;
    }

    /* Push hero below the fixed header - ADJUSTED for LANDSCAPE (tablets/horizontal mobile) */
    .hero {
        padding-top: calc(var(--header-height) + 50px);
    }

    /* Fixed slider height — taller, all slides same size */
    .hero__slider {
        height: 560px;
    }

    .hero__slide {
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--space-lg) var(--space-md) var(--space-sm);
        text-align: center;
        height: 100%;
        overflow: hidden;
    }

    /* Consistent layout: fixed-height zones */
    .hero__slide-content {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero__slide-subtitle {
        font-size: var(--font-size-sm);
        margin-bottom: var(--space-xs);
        min-height: 60px;
        display: flex;
        align-items: center;
    }

    .hero__slide-title {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--space-sm);
        min-height: 72px;
        display: flex;
        align-items: center;
    }

    .hero__slide-btn {
        padding: 12px 32px;
        font-size: var(--font-size-sm);
    }

    .hero__slide-image {
        position: relative;
        right: auto;
        top: auto;
        transform: none;
        width: 180px;
        height: 180px;
        margin: auto auto 0;
    }

    .hero__slide.active .hero__slide-image {
        transform: none;
    }

    .hero__dots {
        margin-top: var(--space-md);
    }

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

    .about__image-wrapper {
        width: 280px;
        height: 280px;
    }

    .contact__input-group {
        grid-template-columns: 1fr;
    }

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

    .footer__right {
        align-items: center;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 1.5rem;
        --font-size-3xl: 1.25rem;
        --container-padding: 1rem;
        --header-height: 80px;
    }

    .header__inner {
        padding: 0 12px;
    }

    .header__logo img {
        height: 70px;
    }

    /* FORCE Portrait padding - fixes vertical mobile cut-off */
    .hero {
        padding-top: calc(var(--header-height) + 45px) !important;
    }

    .section {
        padding: var(--space-2xl) 0;
    }

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

    .workflow__grid {
        grid-template-columns: 1fr;
        max-width: 300px;
        margin: 0 auto;
    }

    .hero__slider {
        height: 480px;
        border-radius: var(--radius-md);
    }

    .hero__slide {
        border-radius: var(--radius-md);
        padding: var(--space-md) var(--space-sm) var(--space-xs);
    }

    .hero__slide-subtitle {
        font-size: var(--font-size-xs);
        min-height: 50px;
    }

    .hero__slide-title {
        font-size: var(--font-size-2xl);
        min-height: 60px;
    }

    .hero__slide-image {
        width: 150px;
        height: 150px;
    }

    .hero__dots {
        margin-top: var(--space-sm);
    }

    .cta__title {
        font-size: var(--font-size-2xl);
    }

    /* Mobile Scroll Highlight for Advantages */
    .advantage-card.active {
        transform: translateY(-8px);
        box-shadow: 0 10px 30px rgba(196, 30, 36, 0.15);
        border-color: transparent;
        background: var(--color-white);
    }

    .advantage-card.active::before {
        transform: scaleX(1);
    }

    .advantage-card.active .advantage-card__icon {
        background: var(--color-primary);
        transform: scale(1.1);
    }

    .advantage-card.active .advantage-card__icon img {
        filter: brightness(0) invert(1);
    }
}

/* ═══════════════════════════════════════════════
   PARTNERS
   ═══════════════════════════════════════════════ */
.partners {
    background: var(--color-white);
    padding: var(--space-xl) 0;
    overflow: hidden;
}

.partners__marquee {
    position: relative;
    width: 100%;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.partners__track {
    display: flex;
    gap: var(--space-2xl);
    width: max-content;
    animation: marquee 40s linear infinite;
    padding: var(--space-md) 0;
}

.partners__track:hover {
    animation-play-state: paused;
}

.partners__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base);
}

.partners__logo:hover {
    transform: scale(1.1);
}

.partners__logo img {
    height: 50px;
    width: auto;
    object-fit: contain;
    /* Removed grayscale filter */
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

/* Mobile Swipe - "Acceleration" */
@media (max-width: 768px) {
    .partners__marquee {
        mask-image: none;
        -webkit-mask-image: none;
        overflow-x: auto;
        scroll-behavior: smooth;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 20px;
        /* Hide scrollbar */
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .partners__marquee::-webkit-scrollbar {
        display: none;
    }

    .partners__track {
        animation: none;
        width: auto;
        gap: var(--space-lg);
        padding: 0 var(--container-padding);
    }

    .partners__logo {
        flex-shrink: 0;
        scroll-snap-align: center;
    }

    .partners__logo img {
        height: 40px;
    }
}