/* shrtn.link — foglio di stile condiviso (index, 404, QR).
   La pagina di redirect generata da build.js NON usa questo file: incorpora
   una copia ridotta di queste regole inline, per evitare una richiesta di rete
   in più su una pagina che vive ~250ms. Se cambi i colori qui, allineali anche
   alla costante CRITICAL_CSS in build.js. */

:root {
  color-scheme: light dark;
  --bg: #fbfbfc;
  --surface: #ffffff;
  --fg: #14181d;
  --muted: #5f6b78;
  --border: #e4e7ec;
  --accent: #2f6df6;
  --accent-fg: #ffffff;
  --radius: 12px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0f13;
    --surface: #14181e;
    --fg: #e7ebf0;
    --muted: #97a2af;
    --border: #232a33;
    --accent: #6f9bff;
    --accent-fg: #0c0f13;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: 40rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 2rem;
  flex: 1 0 auto;
}

.wrap--center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.1em;
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
}

.brand .dot { color: var(--accent); }

h1 {
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 1.75rem 0 0.75rem;
}

h2 {
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 2.25rem 0 0.75rem;
}

p { margin: 0 0 1rem; }

.lead {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.muted { color: var(--muted); }
.small { font-size: 0.875rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.1em 0.4em;
  word-break: break-word;
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

ul.plain { list-style: none; margin: 0 0 1rem; padding: 0; }
ul.plain li { padding: 0.35rem 0 0.35rem 1.4rem; position: relative; }
ul.plain li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.6rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-fg);
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; filter: none; }

.btn--ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1.5rem;
}

/* --- QR --- */

.qr-frame {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 0.5rem auto 1.25rem;
  min-width: 180px;
  min-height: 180px;
}

/* aspect-ratio è la rete di sicurezza: se una futura versione della libreria
   tornasse a imporre un'altezza inline, il QR resterebbe comunque quadrato. */
.qr-frame canvas,
.qr-frame img {
  display: block;
  width: min(70vw, 260px);
  height: auto;
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
}

.target {
  font-family: var(--mono);
  font-size: 0.95rem;
  word-break: break-all;
}

/* --- spinner (404 in modalità fallback) --- */

.spinner {
  width: 22px;
  height: 22px;
  margin: 0 auto 1rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
  * { transition: none !important; }
}

footer {
  flex-shrink: 0;
  padding: 1.5rem 1.25rem 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

[hidden] { display: none !important; }