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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #17202a;
    background: #ffffff;
    line-height: 1.6;
}

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

.container {
    width: min(1180px, calc(100% - 40px));
    margin: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.95);
    border-bottom: 1px solid #eeeeee;
}

.nav {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    font-weight: 400;
}

nav {
    display: flex;
    gap: 28px;
    font-size: 14px;
}

nav a:hover {
    opacity: .6;
}

.nav-button,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
}

.nav-button,
.primary {
    background: #17202a;
    color: #fff;
}

.secondary {
    border: 1px solid #d8d8d8;
}

.hero {
    min-height: 720px;
    display: flex;
    align-items: center;
    background: #f7f8f6;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 70px;
}

.eyebrow {
    display: block;
    margin-bottom: 16px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 650px;
    font-size: clamp(42px, 6vw, 76px);
    line-height: 1.02;
    letter-spacing: -3px;
    margin-bottom: 25px;
}

.hero p {
    max-width: 520px;
    font-size: 18px;
    color: #62676d;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-product {
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    width: 80%;
    aspect-ratio: 1 / 1;
    border-radius: 24px;
    background: #e8ebe7;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 5px;
}

.section {
    padding: 110px 0;
}

.light {
    background: #f7f8f6;
}

.section h2,
.contact-box h2 {
    font-size: clamp(34px, 5vw, 54px);
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 20px;
}

.section-intro {
    max-width: 650px;
    color: #666;
    font-size: 18px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 50px;
}

.feature-grid article {
    padding: 35px;
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 14px;
}

.feature-grid h3 {
    margin-bottom: 12px;
}

.feature-grid p {
    color: #666;
}

.usage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-top: 50px;
}

.usage-grid div {
    padding: 45px 20px;
    border: 1px solid #ddd;
    border-radius: 14px;
    text-align: center;
    font-weight: 600;
}

.contact-section {
    padding: 80px 0;
}

.contact-box {
    padding: 60px;
    border-radius: 20px;
    background: #f0f2ef;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

footer {
    padding: 30px 0;
    border-top: 1px solid #eee;
    color: #777;
    font-size: 13px;
}

@media (max-width: 800px) {

    .nav {
        min-height: 65px;
    }

    nav {
        display: none;
    }

    .nav-button {
        padding: 9px 14px;
    }

    .hero {
        min-height: auto;
        padding: 80px 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-product {
        min-height: auto;
    }

    .product-placeholder {
        width: 100%;
    }

    .feature-grid,
    .usage-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 75px 0;
    }

    .contact-box {
        padding: 35px 25px;
        flex-direction: column;
        align-items: flex-start;
    }
}