:root {
    --primary: #2563eb;
    --text: #222;
    --light: #666;
    --background: #ffffff;
    --section: #f6f8fb;
    --border: #e5e7eb;
}

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

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

.container {
    width: min(1100px, 92%);
    margin: auto;
}

header {
    position: sticky;
    top: 0;
    background: white;
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.2rem;
    font-weight: bold;
}

nav {
    display: flex;
    gap: 24px;
}

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

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

.hero {
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    max-width: 900px;
    margin: auto;
    line-height: 1.15;
}

.hero p {
    max-width: 760px;
    margin: 30px auto;
    color: var(--light);
    font-size: 1.1rem;
}

.button {
    display: inline-block;
    background: var(--primary);
    color: white;
    text-decoration: none;
    padding: 14px 30px;
    border-radius: 8px;
    transition: .2s;
}

.button:hover {
    background: #1d4ed8;
}

.section {
    padding: 80px 0;
}

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

.section h2 {
    text-align: center;
    margin-bottom: 40px;
}

.cards {
    display: grid;
    gap: 25px;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    background: white;
}

.card h3 {
    margin-bottom: 15px;
}

.card p {
    color: var(--light);
}

#about p,
#contact p {
    max-width: 760px;
    margin: auto;
    text-align: center;
    color: var(--light);
}

#contact a {
    color: var(--primary);
    text-decoration: none;
}

footer {
    border-top: 1px solid var(--border);
    padding: 30px;
    text-align: center;
    color: var(--light);
}

@media (max-width: 700px) {

    header .container {
        flex-direction: column;
        height: auto;
        padding: 20px 0;
        gap: 12px;
    }

    nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 2rem;
    }
}