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

:root {
    --accent: #e04622;
    --accent-hover: #c93d1d;
    --dark: #2E2E31;
    --dark-light: #4a4a4e;
    --text: #3a3a3d;
    --text-light: #6b6b70;
    --bg: #ffffff;
    --bg-alt: #f6f6f7;
    --border: #e8e8ea;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 8px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Header === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.header.scrolled {
    border-bottom-color: var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo-polus {
    color: var(--dark);
}

.logo-tm {
    color: var(--accent);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-xs);
    transition: background 0.2s, color 0.2s;
}

.nav-link:hover {
    background: var(--bg-alt);
    color: var(--accent);
}

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

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

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

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

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

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

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

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

.btn-outline:hover {
    border-color: var(--dark);
    color: var(--dark);
}

/* === Hero === */
.hero {
    padding: 160px 0 100px;
    background: var(--bg);
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.15;
    color: var(--dark);
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.accent {
    color: var(--accent);
}

.hero-text {
    font-size: 1.15rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: -0.5px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
}

/* === Sections === */
.section {
    padding: 100px 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: -0.5px;
}

/* === About === */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    padding: 32px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.about-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: var(--radius-sm);
    color: var(--accent);
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.about-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.65;
}

/* === Services === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 32px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: border-color 0.2s;
}

.service-card:hover {
    border-color: var(--accent);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-alt);
    border-radius: var(--radius-sm);
    color: var(--accent);
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.65;
}

/* === Products === */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    padding: 32px 24px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    text-align: center;
    transition: border-color 0.2s;
}

.product-card:hover {
    border-color: var(--accent);
}

.product-icon-wrap {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--bg);
    border-radius: var(--radius);
    color: var(--accent);
    border: 1px solid var(--border);
}

.product-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.product-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.product-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

.product-link:hover {
    color: var(--accent-hover);
}

/* === Partners === */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 16px;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-light);
    transition: border-color 0.2s, color 0.2s;
}

.partner-item:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* === Contact === */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.contact-card {
    padding: 32px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.contact-card-wide {
    text-align: center;
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: var(--radius-sm);
    color: var(--accent);
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.contact-card-wide .contact-icon {
    margin: 0 auto 20px;
}

.contact-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 16px;
}

.contact-detail {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 10px;
}

.contact-detail svg {
    color: var(--accent);
    flex-shrink: 0;
}

.contact-card-wide p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

/* === Footer === */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
    margin-top: 12px;
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 320px;
}

.footer-brand .logo-polus {
    color: #fff;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

.footer-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .partners-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        transition: transform 0.3s;
    }

    .nav.open {
        transform: translateY(0);
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-stats {
        gap: 32px;
    }

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

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

    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .section-header h2 {
        font-size: 1.7rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

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

    .stat {
        flex-direction: row;
        align-items: baseline;
        gap: 8px;
    }
}