* {
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top, #111 0%, #000 60%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card {
    width: 100%;
    max-width: 360px;
    padding: 32px;
    background: rgba(20, 20, 20, 0.9);
    border: 1px solid #222;
    border-radius: 14px;
    box-shadow: 0 0 40px rgba(0,0,0,0.6);
}

h1 {
    text-align: center;
    margin-bottom: 24px;
    font-weight: 600;
}

input {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border-radius: 8px;
    border: none;
    background: #111;
    color: #fff;
    outline: none;
}

input::placeholder {
    color: #777;
}

button {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: none;
    background: #fff;
    color: #000;
    font-weight: 600;
    cursor: pointer;
}

button:hover {
    opacity: 0.85;
}

.nav {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.nav a {
    color: #aaa;
    text-decoration: none;
    font-size: 14px;
}

.nav a:hover {
    color: #fff;
}