/* ====== Auth (login/register) ====== */
* { box-sizing: border-box; }
body {
    margin: 0; font-family: system-ui, sans-serif;
    background: linear-gradient(135deg, #1a73e8, #6d28d9);
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 1rem;
}
.auth-card {
    background: #fff; padding: 2rem 2.2rem; border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    width: 100%; max-width: 420px;
}
.auth-card h1 { margin-top: 0; }
.auth-card label {
    display: block; margin: 0.8rem 0 0.2rem; font-size: 0.9em; color: #555;
}
.auth-card input {
    width: 100%; padding: 0.6em; border: 1px solid #d1d5db; border-radius: 4px; font-size: 1em;
}
.auth-card .btn {
    display: block; text-align: center; text-decoration: none;
    margin-top: 1.2rem; width: 100%; padding: 0.7em;
    background: #1a73e8; color: #fff; border: 0; border-radius: 4px; font-size: 1em; cursor: pointer;
}
.auth-card .btn:hover { background: #155cb8; }
.auth-card .alt { text-align: center; margin-top: 1rem; font-size: 0.9em; }
.auth-card .muted { color: #64748B; line-height: 1.5; }
.app-only-card { text-align: center; }
.alert { padding: 0.7rem 1rem; border-radius: 4px; margin-bottom: 1rem; }
.alert.error { background: #fee2e2; color: #991b1b; }
.alert ul { margin: 0; padding-left: 1.2em; }