:root {
    --bg: #0f1115;
    --surface: #171b21;
    --surface-light: #20252d;
    --text: #f5f7fa;
    --muted: #a7afb9;
    --titanium: #8a919b;
    --accent: #3a8dde;
    --border: #2a3039;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.site-header {
    width: 100%;
    padding: 24px 6%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    background: rgba(15, 17, 21, 0.92);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.logo span {
    color: var(--titanium);
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    color: var(--muted);
    font-size: 0.95rem;
}

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

.hero {
    min-height: 82vh;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 40px;
    padding: 80px 6%;
    background: radial-gradient(circle at 80% 50%, rgba(58,141,222,0.18), transparent 38%),
        linear-gradient(120deg, rgba(15,17,21,0.96), rgba(15,17,21,0.88));
}

.hero-content {
    max-width: 760px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 750px;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.45));
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.78rem;
    font-weight: 700;
    margin-bottom: 18px;
}

h1 {
    font-size: clamp(2.6rem, 7vw, 5.8rem);
    line-height: 0.98;
    max-width: 1000px;
    margin-bottom: 28px;
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 1.05;
    margin-bottom: 22px;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 14px;
}

.hero-text {
    color: var(--muted);
    font-size: 1.25rem;
    max-width: 760px;
    margin-bottom: 36px;
}

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

.btn {
    display: inline-block;
    padding: 14px 22px;
    border-radius: 4px;
    font-weight: 700;
    transition: 0.2s ease;
}

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

.btn.primary:hover {
    transform: translateY(-2px);
}

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

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

.section {
    padding: 90px 6%;
    max-width: 1400px;
    margin: 0 auto;
}

.section-heading {
    max-width: 850px;
    margin-bottom: 42px;
}

.section-heading p {
    color: var(--muted);
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 32px;
    min-height: 230px;
}

.card p,
.product-item p,
.cta p {
    color: var(--muted);
}

.card h3 {
    text-transform: uppercase;
}

.split {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 50px;
    align-items: start;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.product-item {
    padding: 26px;
    background: var(--surface-light);
    border-left: 3px solid var(--accent);
}

.cta {
    background: var(--surface);
    border: 1px solid var(--border);
    margin-bottom: 70px;
}

.cta p {
    max-width: 760px;
    margin-bottom: 28px;
}

.page-hero {
    padding: 110px 6% 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.page-hero p {
    color: var(--muted);
    max-width: 760px;
    font-size: 1.1rem;
}

.product-card {
    display: grid;
    grid-template-columns: 450px 1fr;
    gap: 40px;
    background: var(--surface);
    border: 1px solid var(--border);
    margin-bottom: 40px;
    overflow: hidden;
}

.product-image {
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0f1115;
    padding: 24px;
}

.product-image img {
    width: 100%;
    height: 100%;
    max-height: 320px;
    object-fit: contain;
    display: block;
}

.product-content {
    padding: 40px;
}

.product-label {
    color: var(--accent);
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    font-weight: 700;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.product-content h3 {
    margin-bottom: 18px;
    text-transform: uppercase;
}

.product-content p {
    color: var(--muted);
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 30px;
}

.spec-grid div {
    background: var(--surface-light);
    padding: 18px;
    text-align: center;
}

.spec-grid strong {
    display: block;
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.spec-grid span {
    color: var(--muted);
    font-size: 0.85rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
}

.category-link-card {
    color: inherit;
    text-decoration: none;
    transition: 0.2s ease;
}

.category-link-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

.category-image-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, rgba(58,141,222,0.18), transparent 45%),
        linear-gradient(180deg, #171b21 0%, #0f1115 100%);
}

.category-image-panel span {
    color: var(--accent);
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: 800;
    letter-spacing: -0.08em;
    opacity: 0.75;
}

footer {
    padding: 28px 6%;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .site-header {
        flex-direction: column;
        gap: 18px;
        align-items: center;
    }

    nav {
        gap: 18px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        min-height: auto;
        padding-top: 70px;
    }

    .hero-image {
        order: -1;
    }

    .hero-image img {
        max-width: 450px;
    }

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

    .cards,
    .split,
    .product-grid,
    .category-grid {
        grid-template-columns: 1fr;
    }

    .product-card {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 600px) {
    .section {
        padding: 70px 5%;
    }

    .product-content {
        padding: 28px;
    }

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

    h1 {
        font-size: clamp(2.3rem, 12vw, 4rem);
    }
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
}

.contact-info,
.contact-form {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 40px;
}

.contact-info h3 {
    text-transform: uppercase;
    margin-top: 28px;
}

.contact-info h3:first-child {
    margin-top: 0;
}

.contact-info p,
.form-note {
    color: var(--muted);
}

.contact-info a {
    color: var(--accent);
}

.contact-form {
    display: flex;
    flex-direction: column;
}

.contact-form label {
    margin-bottom: 8px;
    color: var(--text);
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    margin-bottom: 20px;
    padding: 14px;
    background: #0f1115;
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.captcha-box {
    margin-top: 8px;
}

.form-note {
    margin-bottom: 24px;
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}