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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f7fa;
    color: #172033;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* NAVBAR */

header {
    background: #07111f;
    color: white;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 22px 0;
}

.logo {
    font-size: 28px;
    font-weight: bold;
}

.logo span {
    color: #29a9ff;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 25px;
    font-weight: 500;
}

nav a:hover {
    color: #29a9ff;
}

/* HERO */

.hero {
    background: linear-gradient(
        135deg,
        #07111f,
        #12345a
    );

    color: white;
    padding: 120px 0;
}

.hero h1 {
    font-size: 52px;
    max-width: 800px;
}

.hero h1 strong {
    color: #29a9ff;
}

.hero p {
    font-size: 20px;
    max-width: 700px;
    margin: 25px 0;
}

.buttons {
    margin-top: 30px;
}

.btn {
    display: inline-block;
    padding: 13px 25px;
    border-radius: 6px;
    text-decoration: none;
    margin-right: 10px;
}

.primary {
    background: #29a9ff;
    color: white;
}

.secondary {
    border: 1px solid white;
    color: white;
}

/* SERVICES */

.services {
    padding: 80px 0;
}

.services h2,
.about-preview h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 45px;
}

.cards {
    display: grid;
    grid-template-columns:
        repeat(auto-fit, minmax(240px, 1fr));

    gap: 25px;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,.08);
}

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

/* ABOUT */

.about-preview {
    background: #eaf2f8;
    padding: 80px 0;
    text-align: center;
}

.about-preview p {
    max-width: 750px;
    margin: auto auto 30px;
}

/* FOOTER */

footer {
    background: #07111f;
    color: white;
    text-align: center;
    padding: 30px;
}

/* MOBILE */

@media (max-width: 768px) {

    .navbar {
        flex-direction: column;
    }

    nav {
        margin-top: 20px;
    }

    nav a {
        display: inline-block;
        margin: 5px;
    }

    .hero h1 {
        font-size: 38px;
    }
}