/* Página de paso: barra superior, cabecera con número y mapa de pasos, cuerpo en dos columnas (guía | apoyo), navegación anterior/siguiente. */
:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #0f1d33;
  --muted: #4d5b70;
  --line: #dde3ec;
  --accent: #1d63a8;
  --quote-bg: #dceaf6;
  --tint: 11%;
  --s1: #e2453c; --s2: #f0a81c; --s3: #2f9e57; --s4: #1d63a8;
  --s5: #8a5cd6; --s6: #ef7a2a; --s7: #e0495a; --s8: #14918f;
  --f-display: "Barlow Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --f-body: "Public Sans", "Segoe UI", system-ui, sans-serif;
  --f-hand: "Caveat", "Segoe Print", "Bradley Hand", cursive;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1522; --surface: #142033; --ink: #e9eef6; --muted: #a3b0c3; --line: #26354c;
    --accent: #6fb0f0; --quote-bg: #1a2c45; --tint: 16%;
    --s1: #ff6d63; --s2: #f6be4a; --s3: #4cc27a; --s4: #5aa2ec;
    --s5: #a989ec; --s6: #ff9a55; --s7: #ff6f80; --s8: #34bdb9;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1522; --surface: #142033; --ink: #e9eef6; --muted: #a3b0c3; --line: #26354c;
  --accent: #6fb0f0; --quote-bg: #1a2c45; --tint: 16%;
  --s1: #ff6d63; --s2: #f6be4a; --s3: #4cc27a; --s4: #5aa2ec;
  --s5: #a989ec; --s6: #ff9a55; --s7: #ff6f80; --s8: #34bdb9;
  color-scheme: dark;
}
.p1 { --c: var(--s1); } .p2 { --c: var(--s2); } .p3 { --c: var(--s3); } .p4 { --c: var(--s4); }
.p5 { --c: var(--s5); } .p6 { --c: var(--s6); } .p7 { --c: var(--s7); } .p8 { --c: var(--s8); }

* { box-sizing: border-box; }
html { padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.6;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: clamp(20px, 3.5vw, 44px);
}
.wrap { max-width: 1120px; margin: 0 auto; display: grid; gap: clamp(28px, 4vw, 48px); }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 50%, transparent); outline-offset: 2px; border-radius: 4px; }

/* Barra superior */
.topbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px 20px; font-size: .92rem; }
.back { font-weight: 600; text-decoration: none; color: var(--accent); }
.back:hover { text-decoration: underline; text-underline-offset: 3px; }
.where { color: var(--muted); font-variant-numeric: tabular-nums; }

/* Cabecera del paso */
.hero {
  background: color-mix(in srgb, var(--c) var(--tint), var(--surface));
  border-radius: 18px;
  padding: clamp(22px, 4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
}
.hero-text { display: grid; gap: 12px; min-width: 0; }
.num {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--c); color: #fff;
  display: grid; place-items: center;
  font-family: var(--f-display); font-weight: 800; font-size: 2rem;
}
h1 {
  font-family: var(--f-display); font-weight: 800; text-transform: uppercase;
  font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: .92; letter-spacing: -.005em;
  margin: 0; text-wrap: balance;
}
.lede { font-size: clamp(1.1rem, 2vw, 1.3rem); margin: 0; max-width: 46ch; }
.hero svg.ico { width: clamp(120px, 18vw, 200px); height: auto; color: var(--c); }

/* Mapa de pasos */
.map { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.map a {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 50%;
  text-decoration: none; font-family: var(--f-display); font-weight: 800; font-size: 1.05rem;
  border: 2px solid var(--c); color: var(--ink); background: var(--surface);
}
.map a:hover { background: color-mix(in srgb, var(--c) 18%, var(--surface)); }
.map a[aria-current="page"] { background: var(--c); color: #fff; }

/* Cuerpo */
.body { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.main, .aside { display: grid; gap: 28px; min-width: 0; }
h2 {
  font-family: var(--f-display); font-weight: 800; text-transform: uppercase;
  font-size: 1.55rem; letter-spacing: .03em; line-height: 1.1; margin: 0 0 10px;
}
.main p { margin: 0; max-width: 65ch; }
.how { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; counter-reset: how; }
.how li { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 12px; align-items: baseline; max-width: 65ch; }
.how li::before {
  counter-increment: how; content: counter(how);
  font-family: var(--f-display); font-weight: 800; font-size: 1.15rem; color: var(--ink);
  border-bottom: 3px solid var(--c); text-align: center; line-height: 1.3;
}
.exercise {
  border: 2px dashed color-mix(in srgb, var(--c) 60%, var(--line));
  border-radius: 14px; padding: 20px 22px; display: grid; gap: 8px;
}
.exercise h2 { margin: 0; }
.exercise .tag { font-size: .76rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 600; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; font-size: .95rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 600; }
td.min { text-align: right; white-space: nowrap; }
th.min { text-align: right; }
.note { font-size: .88rem; color: var(--muted); margin-top: 8px !important; }

/* Apoyo */
.quote {
  margin: 0; background: var(--quote-bg); padding: 20px 22px 16px;
  border-radius: 4px 18px 6px 22px; transform: rotate(-1deg);
}
.quote p { font-family: var(--f-hand); font-size: 1.6rem; line-height: 1.2; margin: 0 0 8px; }
.quote figcaption { font-size: .82rem; color: var(--muted); text-align: right; }

.box { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; }
.errors { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.errors li { display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: 10px; }
.errors li::before { content: "×"; font-weight: 700; color: var(--s1); line-height: 1.5; }

.check-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.check-head .count { color: var(--muted); font-size: .88rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.checks label { display: flex; gap: 12px; align-items: flex-start; padding: 8px 6px; border-radius: 8px; cursor: pointer; }
.checks label:hover { background: color-mix(in srgb, var(--c) 8%, transparent); }
.checks input {
  appearance: none; margin: 2px 0 0; flex: none;
  width: 22px; height: 22px; border: 2px solid var(--line); border-radius: 6px;
  background: var(--surface); display: grid; place-items: center; cursor: pointer;
}
.checks input:checked { background: var(--c); border-color: var(--c); }
.checks input:checked::after { content: ""; width: 6px; height: 11px; border: solid #fff; border-width: 0 2.5px 2.5px 0; transform: translateY(-1px) rotate(45deg); }
.checks input:checked + span { color: var(--muted); text-decoration: line-through; }

/* Anterior / siguiente */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pager a {
  display: grid; gap: 2px; padding: 16px 20px; border-radius: 14px; text-decoration: none;
  background: var(--surface); border: 1px solid var(--line);
}
.pager a:hover { border-color: var(--c); }
.pager .dir { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.pager .t { font-family: var(--f-display); font-weight: 800; font-size: 1.4rem; text-transform: uppercase; line-height: 1.1; }
.pager .next { text-align: right; grid-column: 2; }

footer { border-top: 1px solid var(--line); padding-top: 16px; color: var(--muted); font-size: .88rem; }
footer p { margin: 0; max-width: 75ch; }

@media (max-width: 860px) {
  .body { grid-template-columns: 1fr; }
  .hero { grid-template-columns: 1fr; }
  .hero svg.ico { width: 120px; grid-row: 1; }
}
@media (max-width: 480px) {
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; }
  .quote { transform: none; }
}
@media (prefers-reduced-motion: no-preference) {
  .checks input, .pager a, .map a { transition: background-color .15s ease, border-color .15s ease; }
}