* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 0.75rem;
    padding: 2.5rem;
    max-width: 480px;
    width: 100%;
    margin: 1rem;
}

h1 {
    color: #f1f5f9;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.device-name {
    margin-bottom: 1.5rem;
    color: #94a3b8;
}

.device-name strong { color: #e2e8f0; }

.form-group { margin-bottom: 1.25rem; }
.form-group label {
    display: block;
    margin-bottom: 0.375rem;
    color: #94a3b8;
    font-size: 0.875rem;
}

.form-group input {
    width: 100%;
    padding: 0.625rem 0.75rem;
    background: #0f172a;
    border: 1px solid #475569;
    border-radius: 0.375rem;
    color: #e2e8f0;
    font-size: 1rem;
}

.form-group input:focus { outline: none; border-color: #2563eb; }

.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    width: 100%;
}

.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }

.alert { padding: 0.75rem 1rem; border-radius: 0.375rem; margin-bottom: 1rem; }
.alert-error { background: #7f1d1d; color: #fca5a5; border: 1px solid #991b1b; }

.warning { margin-top: 1.25rem; color: #fbbf24; font-size: 0.8rem; font-style: italic; }
.info { margin-top: 0.75rem; color: #64748b; font-size: 0.875rem; }