body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0b0f19;
    color: #e2e8f0;
}

/* HEADER */
header {
    display: flex;
    justify-content: space-between;
    padding: 20px 40px;
    background: #020617;
}

.logo {
    font-weight: bold;
}

/* NAV */
nav a {
    margin-left: 20px;
    text-decoration: none;
    color: #94a3b8;
}

nav a:hover {
    color: white;
}

/* HERO */
.hero {
    text-align: center;
    padding: 100px 20px;
}

.hero h1 {
    font-size: 42px;
}

/* BUTTON */
.btn {
    background: #38bdf8;
    padding: 12px 25px;
    border-radius: 10px;
    color: black;
    text-decoration: none;
    border: none;
    cursor: pointer;
}

/* CARDS */
.cards {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 60px;
    flex-wrap: wrap;
}

.card {
    background: #111827;
    padding: 30px;
    border-radius: 12px;
    width: 220px;
    text-align: center;
}

.big {
    max-width: 500px;
    margin: auto;
}

/* INPUT */
input {
    display: block;
    width: 100%;
    margin-bottom: 15px;
    padding: 10px;
    border-radius: 8px;
    border: none;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 20px;
    background: #020617;
}