:root {
    color-scheme: light dark;
    --bg: #f3f4f6;
    --fg: #111827;
    --muted: #6b7280;
    --card: #fff;
    --border: #e5e7eb;
    --input-border: #d1d5db;
    --input-bg: #fff;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-fg: #fff;
    --err-bg: #fee2e2;
    --err-fg: #991b1b;
    --ok-bg: #d1fae5;
    --ok-fg: #065f46;
    --pending-bg: #fef3c7;
    --pending-fg: #92400e;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
}
.card {
    width: min(380px, 92vw);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem 2.25rem;
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
}
.logo {
    display: block;
    width: 140px;
    height: auto;
    margin: 0 auto .75rem;
}
h1 {
    margin: 0 0 .25rem;
    font-size: 1.25rem;
    text-align: center;
    font-weight: 600;
}
h2 {
    margin: .5rem 0 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}
.muted {
    margin: 0 0 1.25rem;
    font-size: .9rem;
    color: var(--muted);
    text-align: center;
}
label {
    display: block;
    font-size: .85rem;
    margin: .75rem 0 .25rem;
    color: var(--fg);
}
input {
    display: block;
    width: 100%;
    padding: .55rem .65rem;
    margin-bottom: .25rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--fg);
    font-size: 1rem;
}
input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}
button {
    width: 100%;
    margin-top: 1rem;
    padding: .65rem;
    background: var(--primary);
    color: var(--primary-fg);
    border: 0;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
}
button:hover { background: var(--primary-hover); }
.flash {
    padding: .55rem .7rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: .9rem;
}
.flash.error { background: var(--err-bg); color: var(--err-fg); }
dl.kv {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 6px 12px;
    margin: .75rem 0 1.25rem;
    font-size: .9rem;
}
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; word-break: break-all; }
.btn-link {
    display: block;
    text-align: center;
    margin-top: 1rem;
    padding: .65rem;
    background: var(--primary);
    color: var(--primary-fg);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
}
.btn-link:hover { background: var(--primary-hover); }
.status {
    margin: 1rem 0 0;
    padding: .55rem .7rem;
    border-radius: 8px;
    font-size: .9rem;
}
.status.ok      { background: var(--ok-bg); color: var(--ok-fg); }
.status.pending { background: var(--pending-bg); color: var(--pending-fg); }
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1220;
        --fg: #e5e7eb;
        --muted: #9ca3af;
        --card: #111827;
        --border: #1f2937;
        --input-border: #374151;
        --input-bg: #0b1220;
        --err-bg: #3b1313;
        --err-fg: #fecaca;
        --ok-bg: #064e3b;
        --ok-fg: #d1fae5;
        --pending-bg: #78350f;
        --pending-fg: #fef3c7;
    }
}