/* ===== Variables ===== */
:root {
    --color-bg: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-card: #18181b;
    --color-bg-hover: #27272a;
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-border: #27272a;
    --color-primary: #6366f1;
    --color-primary-hover: #818cf8;
    --color-accent: #8b5cf6;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-text: linear-gradient(90deg, #6366f1, #8b5cf6, #a855f7);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s ease;
    --container-max: 1200px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

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

ul {
    list-style: none;
}

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

/* ===== Container ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    color: var(--color-text);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.25);
}

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

.btn-secondary:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-text-muted);
}

.btn-full {
    width: 100%;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

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

.logo-icon {
    width: 36px;
    height: 36px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.nav-menu a:hover {
    color: var(--color-text);
}

.nav-cta {
    padding: 10px 20px;
    background: var(--gradient-primary);
    color: white !important;
    border-radius: var(--radius-sm);
}

.nav-cta:hover {
    opacity: 0.9;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + 60px) 0 80px;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 100px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.hero-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px 24px;
    background: rgba(24, 24, 27, 0.6);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

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

.hero-card:nth-child(2) {
    margin-top: 40px;
}

.hero-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
}

.hero-card-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.hero-card span {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.hero-bg {
    position: absolute;
    inset: 60px 0 0 0;
    background:
        linear-gradient(to right, var(--color-bg) 0%, transparent 40%),
        url('../img/hero-bg.jpg') right top / contain no-repeat;
    pointer-events: none;
    z-index: -1;
}

/* ===== About Section ===== */
.about {
    padding: 120px 0;
    background: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 17px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.about-text strong {
    color: var(--color-text);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.stat-card {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ===== Services Section ===== */
.services {
    padding: 120px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    padding: 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition);
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.service-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--color-primary);
}

.service-title {
    font-size: 22px;
    margin-bottom: 12px;
}

.service-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-features li {
    padding: 6px 12px;
    font-size: 13px;
    color: var(--color-text-muted);
    background: var(--color-bg-hover);
    border-radius: 100px;
}

/* ===== Tech Section ===== */
.tech {
    padding: 120px 0;
    background: var(--color-bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.tech-category {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.tech-category-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text-secondary);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tech-tag {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    background: var(--color-bg-hover);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.tech-tag:hover {
    background: var(--color-primary);
}

/* ===== Process Section ===== */
.process {
    position: relative;
    padding: 120px 0;
    background:
        linear-gradient(to bottom, rgba(17, 17, 19, 0.5) 0%, rgba(17, 17, 19, 0.7) 100%),
        url('../img/process-bg.jpg') center center / 100% auto no-repeat;
    background-color: var(--color-bg-secondary);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px 32px;
    margin-bottom: 48px;
}

.process-step {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.process-step-number {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.process-step-content h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.process-step-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.process-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.process-info-row {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
}

.process-info-label {
    color: var(--color-text-muted);
}

.process-info-value {
    color: var(--color-text);
    font-weight: 500;
}

.process-info-divider {
    color: var(--color-border);
    margin: 0 8px;
}

.process-info-standards .process-info-value {
    color: var(--color-primary);
}

/* ===== Pricing Section ===== */
.pricing {
    padding: 120px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.pricing-card {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.pricing-card:hover {
    border-color: var(--color-primary);
}

.pricing-step {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-border);
    margin-bottom: 16px;
}

.pricing-title {
    font-size: 18px;
    margin-bottom: 12px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.pricing-meta {
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.pricing-price {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
}

.pricing-cta {
    text-align: center;
}

.pricing-cta p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

/* ===== Advantages Section ===== */
.advantages {
    padding: 120px 0;
    background: var(--color-bg-secondary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.advantage-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.advantage-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

.advantage-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-primary);
}

.advantage-title {
    font-size: 18px;
    margin-bottom: 8px;
}

.advantage-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* ===== Cases Section ===== */
.cases {
    padding: 120px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    display: flex;
    flex-direction: column;
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition);
    text-decoration: none;
}

.case-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.case-badge {
    display: inline-block;
    width: fit-content;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    border-radius: 100px;
    margin-bottom: 16px;
}

.case-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.case-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.case-tags span {
    padding: 4px 10px;
    font-size: 12px;
    color: var(--color-text-muted);
    background: var(--color-bg-hover);
    border-radius: 100px;
}

.case-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.case-link svg {
    width: 16px;
    height: 16px;
    stroke: var(--color-text-muted);
    transition: all var(--transition);
}

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

.case-card:hover .case-link svg {
    stroke: var(--color-primary);
    transform: translate(2px, -2px);
}

.case-client {
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ===== Contact Section ===== */
.contact {
    padding: 120px 0;
}

.contact-centered {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.contact-desc {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 24px;
}

.contact-link {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition);
}

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

.contact-divider {
    font-size: 24px;
    color: var(--color-text-muted);
}

.contact-address {
    display: inline-block;
    text-align: left;
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ===== Footer ===== */
.footer {
    padding: 80px 0 40px;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    max-width: 280px;
}

.footer-nav h4,
.footer-contact h4,
.footer-legal h4,
.footer-activities h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.footer-nav ul,
.footer-contact ul,
.footer-legal ul,
.footer-activities ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav a,
.footer-contact a,
.footer-legal li,
.footer-activities li {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.footer-note {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 12px;
}

.footer-okved-inline {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.footer-okved-inline span {
    color: var(--color-text-muted);
}

.footer-nav a:hover,
.footer-contact a:hover {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin: 0 auto 40px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        margin-top: 40px;
    }

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

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

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

    .process-timeline {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 32px;
    }

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

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

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

    .contact-links {
        flex-direction: column;
        gap: 12px;
    }

    .contact-link {
        font-size: 20px;
    }

    .contact-divider {
        display: none;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        padding: 20px;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: 12px 0;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-cta {
        margin-top: 16px;
        text-align: center;
    }

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

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

    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + 40px) 0 60px;
    }

    .hero-visual {
        flex-wrap: wrap;
    }

    .hero-card:nth-child(2) {
        margin-top: 0;
    }

    .hero-bg {
        inset: 0;
        background:
            linear-gradient(to bottom, var(--color-bg) 0%, transparent 30%),
            url('../img/hero-bg-mobile.jpg') center top / cover no-repeat;
    }

    .process {
        background:
            linear-gradient(to bottom, rgba(17, 17, 19, 0.5) 0%, rgba(17, 17, 19, 0.7) 100%),
            url('../img/process-bg-mobile.jpg') center top / cover no-repeat;
        background-color: var(--color-bg-secondary);
    }

    .process-timeline {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .process-info-row {
        flex-direction: column;
        gap: 12px;
    }

    .process-info-divider {
        display: none;
    }

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

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .service-card,
    .advantage-card,
    .pricing-card,
    .tech-category {
        padding: 24px;
    }

    .contact-form-wrapper {
        padding: 24px;
    }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ===== Selection ===== */
::selection {
    background: var(--color-primary);
    color: white;
}