:root {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
body {
    margin: 0;
    background: #0b0f14;
    color: #eee;
}
.center {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 16px;
}
.card {
    background: #141a22;
    padding: 24px;
    border-radius: 12px;
    width: 100%;
    max-width: 360px;
    -webkit-box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}
h1 {
    margin-top: 0;
    font-size: 20px;
}
label {
    display: grid;
    gap: 8px;
    margin-bottom: 12px;
}
input {
    background: #0f141b;
    border: 1px solid #2a3340;
    color: #eee;
    padding: 10px 12px;
    border-radius: 8px;
}
input:focus {
    outline: none;
    border-color: #4aa3ff;
}
button {
    width: 100%;
    padding: 10px 12px;
    border: 0;
    border-radius: 8px;
    background: #2a7df6;
    color: white;
    font-weight: 600;
    cursor: pointer;
}
button:hover {
    -webkit-filter: brightness(1.1);
    filter: brightness(1.1);
}
.error {
    color: #ff6b6b;
    margin: 8px 0 0;
}