:root {
  --paper: #efe8d8;
  --paper-dim: #e3d9c3;
  --surface: #fbf7ee;
  --ink: #201c16;
  --muted: #7c7161;
  --border: #d9cbaa;
  --steel: #47535d;
  --safety: #dd5c1c;
  --safety-deep: #a8420f;
  --safety-contrast: #fff8ee;
  --blueprint: #2c4356;
  --caution-bg: #fbeadb;
  --caution-border: var(--safety);
  --caution-ink: #7a3208;
  --shadow: 0 2px 0 rgba(32,28,22,0.06), 0 14px 28px -18px rgba(32,28,22,0.35);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #17130f;
    --paper-dim: #1e1811;
    --surface: #221b13;
    --ink: #f2ead9;
    --muted: #ab9c85;
    --border: #40331f;
    --steel: #9fb0ba;
    --safety: #ff7a37;
    --safety-deep: #ffab74;
    --safety-contrast: #201202;
    --blueprint: #7fa8c4;
    --caution-bg: #2c1c0f;
    --caution-border: var(--safety);
    --caution-ink: #f0b784;
    --shadow: 0 2px 0 rgba(0,0,0,0.3), 0 14px 28px -18px rgba(0,0,0,0.6);
  }
}
:root[data-theme="dark"] {
  --paper: #17130f;
  --paper-dim: #1e1811;
  --surface: #221b13;
  --ink: #f2ead9;
  --muted: #ab9c85;
  --border: #40331f;
  --steel: #9fb0ba;
  --safety: #ff7a37;
  --safety-deep: #ffab74;
  --safety-contrast: #201202;
  --blueprint: #7fa8c4;
  --caution-bg: #2c1c0f;
  --caution-border: var(--safety);
  --caution-ink: #f0b784;
  --shadow: 0 2px 0 rgba(0,0,0,0.3), 0 14px 28px -18px rgba(0,0,0,0.6);
}

* { box-sizing: border-box; }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  padding: 0 16px;
  background:
    linear-gradient(var(--paper), var(--paper)),
    repeating-linear-gradient(0deg, transparent, transparent 27px, color-mix(in srgb, var(--blueprint) 7%, transparent) 28px),
    repeating-linear-gradient(90deg, transparent, transparent 27px, color-mix(in srgb, var(--blueprint) 7%, transparent) 28px);
  color: var(--ink);
  font-family: "Public Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.shell { max-width: 620px; margin: 0 auto; padding-block: 22px 44px; }

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.brand {
  font-family: "Oswald", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}
.tag {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--safety-deep);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: 3px;
  white-space: nowrap;
}

/* breadcrumb / progress trail */
.trail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  min-height: 22px;
  margin-bottom: 12px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  color: var(--muted);
}
.trail .crumb {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 3px;
}
.trail .crumb.here { color: var(--safety-deep); border-color: var(--safety); }
.trail .sep { opacity: 0.5; }

.toolbar { display: flex; gap: 16px; margin-bottom: 10px; }
.link-btn {
  background: none; border: none; color: var(--muted);
  font-family: "Public Sans", sans-serif; font-size: 0.85rem; font-weight: 600;
  padding: 4px 0; cursor: pointer;
}
.link-btn:hover { color: var(--safety-deep); }
.link-btn:focus-visible, .option-btn:focus-visible, .primary-btn:focus-visible,
.checklist-row label:focus-within, .grid-card:focus-visible {
  outline: 2px solid var(--safety); outline-offset: 2px;
}

@keyframes riseIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: var(--shadow);
  animation: riseIn 0.22s ease-out;
  overflow: hidden;
}
.card-body { padding: 24px 22px; }

/* hero — start screen only */
.hero {
  position: relative;
  margin: 0 0 -1px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.hero img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20,15,10,0.05) 0%, rgba(20,15,10,0.75) 100%);
}
.hero-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 16px 20px 14px;
  color: #fff8ee;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* category banner — persists through a branch */
.cat-banner { position: relative; aspect-ratio: 21 / 9; }
.cat-banner img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cat-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,15,10,0) 55%, rgba(20,15,10,0.55) 100%); }

.card h2 {
  font-family: "Oswald", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-size: 1.28rem;
  line-height: 1.25;
  text-wrap: balance;
  margin: 0 0 18px;
}

/* option grids */
.options { display: flex; flex-direction: column; gap: 9px; }
.options.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.option-btn {
  text-align: left;
  padding: 15px 16px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink);
  font-family: "Public Sans", sans-serif;
  font-size: 0.96rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color .12s, background .12s, transform .08s;
}
.options.duo .option-btn {
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  min-height: 64px;
  font-family: "Oswald", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 0.98rem;
}
.option-btn:hover { border-color: var(--safety); background: var(--surface); }
.option-btn.picked { background: var(--safety); border-color: var(--safety); color: var(--safety-contrast); transform: scale(0.98); }

/* start screen: image card grid */
.grid-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.grid-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  background: var(--paper);
  aspect-ratio: 4 / 3.1;
  transition: transform .12s, border-color .12s;
}
.grid-card:hover { transform: translateY(-2px); border-color: var(--safety); }
.grid-card img { width: 100%; height: 100%; object-fit: cover; display: block; }
.grid-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,15,10,0) 45%, rgba(20,15,10,0.72) 100%); }
.grid-card .label {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 10px 11px;
  color: #fff8ee;
  font-family: "Oswald", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-size: 0.92rem;
  line-height: 1.2;
  z-index: 1;
}
.grid-card .num {
  position: absolute; top: 8px; left: 8px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.62rem;
  color: #fff8ee;
  background: rgba(20,15,10,0.5);
  padding: 2px 6px;
  border-radius: 2px;
  letter-spacing: 0.05em;
  z-index: 1;
}

/* checklist */
.checklist { display: flex; flex-direction: column; }
.checklist-row { padding: 10px 0; border-bottom: 1px dashed var(--border); }
.checklist-row.none-row { border-bottom: none; margin-top: 4px; padding-top: 16px; border-top: 1px solid var(--border); }
.checklist-row label { display: flex; align-items: center; gap: 12px; cursor: pointer; font-size: 0.97rem; }
.checklist-row input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--safety); flex: none; }

.primary-btn {
  margin-top: 20px;
  width: 100%;
  padding: 15px 16px;
  border: none;
  border-radius: 3px;
  background: var(--safety);
  color: var(--safety-contrast);
  font-family: "Oswald", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 0.95rem;
  cursor: pointer;
}
.primary-btn:hover { background: var(--safety-deep); }

/* stop / caution cards — hazard stripe */
.card.stop { background: var(--caution-bg); }
.hazard-bar {
  height: 10px;
  background-image: repeating-linear-gradient(135deg, var(--safety), var(--safety) 12px, var(--ink) 12px, var(--ink) 24px);
}
.card.stop .card-body h2 { color: var(--caution-ink); }
.card.stop p { margin: 0 0 14px; line-height: 1.55; }
.card.stop p:last-child { margin-bottom: 0; }
.stop-label {
  display: inline-block;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--caution-ink);
  border: 1px solid var(--caution-border);
  padding: 3px 8px;
  border-radius: 2px;
  margin-bottom: 12px;
}

.card.result .card-body h2 { color: var(--safety-deep); }
.warning {
  background: var(--caution-bg);
  border: 1px solid var(--caution-border);
  color: var(--caution-ink);
  border-radius: 3px;
  padding: 12px 14px;
  font-size: 0.87rem;
  line-height: 1.45;
  margin-bottom: 18px;
}

/* result: work-order ticket */
.arreglo-card {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--paper);
}
.arreglo-card + .arreglo-card { margin-top: 14px; }
.arreglo-photo { aspect-ratio: 16 / 10; }
.arreglo-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.arreglo-inner { padding: 18px 19px; }
.arreglo-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.arreglo-eyebrow .num {
  background: var(--safety);
  color: var(--safety-contrast);
  padding: 3px 8px;
  border-radius: 2px;
  font-weight: 600;
}
.arreglo-card h3 {
  font-family: "Oswald", sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 1.08rem;
  line-height: 1.28;
  margin: 0 0 10px;
  text-wrap: balance;
}
.resumen { margin: 0 0 14px; line-height: 1.55; }
.spec-row {
  display: flex; gap: 8px; align-items: baseline;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 12px;
}
.spec-row b { color: var(--ink); font-weight: 600; text-transform: none; letter-spacing: 0; font-family: "Public Sans", sans-serif; }
.antes-de-label {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 8px;
}
.antes-de { margin: 0 0 14px; padding-left: 0; list-style: none; }
.antes-de li { position: relative; padding-left: 18px; margin-bottom: 7px; line-height: 1.5; font-size: 0.94rem; }
.antes-de li::before { content: "—"; position: absolute; left: 0; color: var(--safety); }

/* "Qué vas a necesitar" — lista de compra, se diferencia de las cautelas
   con un marcador propio en el color acero en vez del naranja de alerta. */
.materiales-label { margin-top: 4px; }
.materiales li::before { content: "▸"; color: var(--steel); }
.cita { font-size: 0.81rem; color: var(--muted); margin: 0; padding-top: 12px; border-top: 1px dashed var(--border); }

.footer { text-align: center; color: var(--muted); font-size: 0.79rem; margin-top: 24px; line-height: 1.5; }
.footer strong { color: var(--ink); }