:root {
  --bg: #fbf6ef;
  --surface: #ffffff;
  --text: #2b2422;
  --muted: #6f625d;
  --border: #e8ddd3;
  --primary: #c0392b;
  --primary-text: #ffffff;
  --accent: #1f7a4d;
  --danger: #b3261e;
  --claimed-bg: #f1ebe4;
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1715;
    --surface: #272020;
    --text: #f3ebe6;
    --muted: #b5a8a1;
    --border: #3d3331;
    --primary: #e2584a;
    --primary-text: #1c1715;
    --accent: #4cc38a;
    --danger: #ff8a80;
    --claimed-bg: #221c1b;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

h2 { font-size: 1.25rem; margin: 0 0 8px; }

.hero { text-align: center; margin: 8px 0 28px; }
.hero-icon { font-size: 3rem; line-height: 1; margin: 0 0 8px; }
.hero h1 {
  /* crece con la pantalla: ~2.1rem en celular, hasta 3rem en computador */
  font-size: clamp(2.1rem, 7vw, 3rem);
  line-height: 1.1;
  font-weight: 800;
  color: var(--primary);
  margin: 0 0 10px;
  text-wrap: balance;
}

.subtitle { color: var(--muted); margin: 0; }

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 24px 16px 32px;
  border-top: 1px solid var(--border);
  max-width: 480px;
  margin: 0 auto;
}
.hint { color: var(--muted); font-size: 0.95rem; margin: 0 0 16px; }
.error { color: var(--danger); font-weight: 600; min-height: 1.5em; margin: 8px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

label { display: block; font-weight: 600; margin-bottom: 6px; }

textarea,
input {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}
textarea { min-height: 220px; resize: vertical; }
textarea:focus, input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.pin-input {
  font-size: 2rem;
  letter-spacing: 0.5em;
  text-align: center;
  padding-left: calc(12px + 0.5em); /* compensa el espaciado para que quede centrado */
}

.counter { color: var(--muted); font-size: 0.9rem; margin: 6px 0 0; }

.btn {
  display: block;
  width: 100%;
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-top: 12px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.btn:disabled { opacity: 0.6; cursor: default; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-whatsapp { background: #25d366; border-color: #25d366; color: #0b3d22; }
.btn-link { background: none; border: none; color: var(--muted); text-decoration: underline; }

.link-box {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.link-box input { font-size: 0.85rem; }
.link-box .btn { width: auto; margin: 0; white-space: nowrap; }

.warning {
  border-left: 4px solid var(--primary);
}

.names {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.name-btn {
  font: inherit;
  font-weight: 600;
  padding: 14px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  overflow-wrap: anywhere;
}
.name-btn:hover { border-color: var(--primary); }
.name-btn.claimed {
  background: var(--claimed-bg);
  color: var(--muted);
  font-weight: 400;
}
.name-btn.claimed::before { content: "✓ "; color: var(--accent); }

.result { text-align: center; }
.receiver {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  margin: 8px 0 16px;
  overflow-wrap: anywhere;
}

.admin-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.admin-row:last-child { border-bottom: none; }
.admin-row .btn { width: auto; margin: 0; padding: 8px 12px; }
.admin-row .state { color: var(--muted); font-size: 0.9rem; }

[hidden] { display: none !important; }