body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0b1220;
    color: white;
    text-align: center;
}

.hero {
    padding: 80px 20px;
    background: linear-gradient(135deg,#0b1220,#111b33);
}

.logo {
    width: 120px;
    margin-bottom: 20px;
}

h1 {
    font-size: 32px;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 25px;
    background: #00c2ff;
    color: black;
    font-weight: bold;
    border-radius: 8px;
    text-decoration: none;
}

.info {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding: 40px;
}

.card {
    background: #121c33;
    margin: 10px;
    padding: 20px;
    border-radius: 10px;
    width: 250px;
}

.container {
    padding: 60px 20px;
}

input {
    padding: 12px;
    width: 280px;
    border-radius: 8px;
    border: none;
    margin-top: 20px;
}

button {
    padding: 12px 20px;
    margin-left: 10px;
    background: #00c2ff;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
}

#result {
    margin-top: 30px;
    font-size: 18px;
}

.valid {
    color: #00ff99;
}

.invalid {
    color: #ff4d4d;
}

footer {
    padding: 20px;
    font-size: 12px;
    opacity: 0.6;
}