body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #fff;
}

header {
    background: #111827;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 22px;
    font-weight: bold;
    color: #38bdf8;
}

nav a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
}

nav a:hover {
    color: #38bdf8;
}

.container {
    padding: 40px;
}

.card {
    background: #1f2937;
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
}

button {
    padding: 10px 15px;
    border: none;
    background: #38bdf8;
    color: #000;
    cursor: pointer;
    border-radius: 8px;
}

input {
    padding: 10px;
    margin: 5px;
    width: 200px;
}
footer {
    text-align: center;
    padding: 20px;
    background: #111827;
    margin-top: 40px;
}