:root {
    --fg: #0f172a;
    --muted: #64748b;
    --bg: #f8fafc;
    --card: #ffffff;
    --line: #e2e8f0;
    --brand: #0f766e;
    --ok: #15803d;
    --warn: #b45309;
    --err: #b91c1c;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main { max-width: 640px; margin: 0 auto; padding: 16px; padding-bottom: calc(24px + env(safe-area-inset-bottom)); }
h1 { font-size: 1.35rem; margin: .5rem 0 1rem; }
a { color: var(--brand); }
.muted { color: var(--muted); font-size: .9rem; }
.empty { text-align: center; padding: 48px 8px; }

.banner { display: none; padding: 10px 16px; font-size: .95rem; }
.banner:not(:empty) { display: block; }
.banner-ok { background: #dcfce7; color: var(--ok); }
.banner-info { background: #e0f2fe; color: #075985; }
.banner-error { background: #fee2e2; color: var(--err); border-radius: 8px; }

.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.foot { display: flex; justify-content: space-between; align-items: center; margin-top: 24px; gap: 12px; flex-wrap: wrap; }

button, .primary, .secondary, .ghost {
    font: inherit; border-radius: 10px; cursor: pointer; text-decoration: none; display: inline-block;
}
.ghost { background: none; border: 1px solid var(--line); padding: 8px 14px; color: var(--fg); }
.link { background: none; border: 0; color: var(--err); padding: 0; }
.primary {
    display: block; text-align: center; background: var(--brand); color: #fff; border: 0;
    padding: 18px; font-size: 1.15rem; font-weight: 600; margin: 8px 0 12px;
}
.secondary { display: block; text-align: center; border: 1px solid var(--brand); padding: 12px; margin-bottom: 16px; }
.disabled { pointer-events: none; opacity: .4; }

.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.deca a {
    display: grid; gap: 2px; padding: 14px; background: var(--card); border: 1px solid var(--line);
    border-radius: 12px; color: var(--fg); text-decoration: none;
}
.deca-off a { opacity: .6; }
.tag { justify-self: start; font-size: .8rem; padding: 2px 8px; border-radius: 999px; margin-top: 4px; }
.tag-ok { background: #dcfce7; color: var(--ok); }
.tag-warn { background: #fef3c7; color: var(--warn); }
.tag-off { background: #fee2e2; color: var(--err); }

.data { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 0; }
.data dt { color: var(--muted); font-size: .85rem; margin-top: 10px; }
.data dt:first-child { margin-top: 0; }
.data dd { margin: 2px 0 0; }
.data ul { margin: 0; padding-left: 18px; }

/* Modo control: blanco puro, QR lo más grande posible, nada que distraiga. */
body.in-control { background: #fff; }
body.in-control main { max-width: none; padding: 12px; }
body.in-control .banner { display: none; }
.control { min-height: 100vh; display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.control-head { display: grid; gap: 2px; }
.control-head strong { font-size: 1.4rem; }
.control-head span { color: var(--muted); font-size: .9rem; }
.control-qr { width: min(92vw, 70vh); aspect-ratio: 1; }
.control-qr svg { width: 100%; height: 100%; display: block; }
.control-invalid { padding: 32px 16px; background: #fee2e2; color: var(--err); border-radius: 12px; font-size: 1.1rem; }
.control-data { margin: 0; display: grid; gap: 6px; }
.control-data dt { color: var(--muted); font-size: .8rem; }
.control-data dd { margin: 0; font-size: 1.15rem; font-weight: 600; }
.control-hint { color: var(--muted); font-size: .85rem; margin: 0; }
.control-close { background: none; border: 1px solid var(--line); padding: 10px 16px; margin-top: auto; }