* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #0f172a;
    color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.card {
    background: #1e293b;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    width: 100%;
    max-width: 480px;
    text-align: center;
}

h1 {
    margin-bottom: 0.5rem;
    color: #38bdf8;
}

p {
    color: #94a3b8;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input {
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #334155;
    background: #0f172a;
    color: #fff;
    outline: none;
}

button {
    padding: 12px;
    border: none;
    border-radius: 6px;
    background: #0284c7;
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #0369a1;
}

button:disabled {
    background: #475569;
    cursor: not-allowed;
}

.status {
    margin-top: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}