:root {
    --bg: #ffffff;
    --surface: #f7f8fa;
    --card: #ffffff;

    --text: #111827;
    --muted: #6b7280;

    --accent: #0f766e;
    --border: #e5e7eb;
}


* {
    box-sizing: border-box;
}


html {
    scroll-behavior: smooth;
}


body {
    margin: 0;
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Arial,
        sans-serif;

    background: var(--bg);
    color: var(--text);
}


.container {
    max-width: 1100px;
    margin: auto;
    padding: 0 24px;
}


/* Header */

.header {
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}


.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}


.logo {
    font-size: 24px;
    font-weight: 700;
}


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


nav a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 24px;
    font-size: 14px;
}


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



/* Hero */

.hero {
    padding: 55px 0 45px;
}


.hero h1 {
    font-size: 44px;
    line-height: 1.15;
    letter-spacing: -1px;

    margin: 0 0 18px;
}


.hero p {
    max-width: 600px;

    color: var(--muted);

    font-size: 17px;
    line-height: 1.55;

    margin: 0;
}



/* Buttons */

.button {

    display: inline-block;

    margin-top: 24px;

    padding: 11px 22px;

    background: var(--accent);

    color: white;

    border-radius: 7px;

    text-decoration: none;

    font-size: 14px;
    font-weight: 600;
}


.secondary {
    background: white;
    color: var(--accent);
    border: 1px solid var(--accent);
}



/* Sections */

.section {
    padding: 45px 0;
}


.section.gray {
    background: var(--surface);
}


h2 {
    font-size: 32px;
    letter-spacing: -0.5px;

    margin: 0 0 28px;
}



/* Cards */

.cards {

    display: grid;

    grid-template-columns:
    repeat(3, 1fr);

    gap: 18px;

}


.card {

    border: 1px solid var(--border);

    padding: 22px;

    border-radius: 12px;

}


.card h3 {

    margin: 0 0 12px;

    font-size: 19px;

}


.card p {

    color: var(--muted);

    line-height: 1.5;

    margin: 0;

}



/* Expertise */

.stack {

    display: flex;

    flex-wrap: wrap;

    gap: 10px;

}


.stack span {

    background: var(--surface);

    border: 1px solid var(--border);

    padding: 8px 15px;

    border-radius: 20px;

    font-size: 13px;

}


.description {

    max-width: 650px;

    margin-top: 22px;

    color: var(--muted);

    line-height: 1.5;

}



/* Product */

.product {

    display: grid;

    grid-template-columns: 1fr 260px;

    gap: 40px;

    align-items: center;

}


.product ul {

    padding-left: 18px;

    color: var(--muted);

}


.product li {

    margin-bottom: 8px;

}



.product-box {

    min-height: 220px;

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: 16px;

    display: flex;

    justify-content: center;

    align-items: center;

    text-align: center;


    font-size: 28px;

    line-height: 1.4;

    color: var(--accent);

}



/* Contact */

.contact {

    text-align: center;

}


.contact p {

    color: var(--muted);

}



/* Footer */

footer {

    padding: 20px 0;

    border-top: 1px solid var(--border);

    color: var(--muted);

    font-size: 13px;

}



/* Mobile */

@media(max-width:800px) {

    .hero h1 {
        font-size: 34px;
    }


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


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


    nav {
        display:none;
    }


    h2 {
        font-size: 28px;
    }

}