/* Tuzipa — hoja de muestras: carbón y ámbar */

:root {
  --page: #14161a;
  --sheet: #1d2026;
  --light: #e4e4e1;
  --ink: #d8dbdf;
  --ink-soft: #8a9098;
  --ink-dark: #14161a;
  --amber: #e8a33d;
  --green: #4fb79a;
  --line: rgba(216, 219, 223, 0.16);
  --sheet-pad: 56px;
  --gap: 28px;
  --rhythm: 44px;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: system-ui, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  padding: 40px 40px 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.8;
  overflow-x: hidden;
}

a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 163, 61, 0.45);
}

a:hover { border-bottom-color: var(--amber); }

a:focus-visible,
:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

img { max-width: 100%; height: auto; display: block; }

p { margin: 0 0 1.15em; }

p:last-child { margin-bottom: 0; }

/* ---------- estructura ---------- */

.shell { max-width: 1220px; margin: 0 auto; }

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px 30px;
  padding-bottom: 18px;
}

.mark {
  font-family: var(--serif);
  font-size: 21px;
  letter-spacing: 0.06em;
  color: var(--ink);
  border-bottom: none;
}

.mark span { color: var(--green); }

.topbar nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.topbar nav a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.topbar nav a:hover,
.topbar nav a[aria-current='page'] {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

.sheet {
  background: var(--sheet);
  border: 1px solid rgba(232, 163, 61, 0.38);
  padding: var(--sheet-pad);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
}

.sheet > section { margin-top: var(--rhythm); }

.sheet > section:first-child { margin-top: 0; }

/* ---------- tipografía ---------- */

h1, h2, h3 { font-family: var(--serif); font-weight: 400; }

h1 {
  margin: 0;
  font-size: clamp(38px, 5.6vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.015em;
}

h2 {
  margin: 0 0 0.7em;
  font-size: clamp(23px, 2.5vw, 29px);
  line-height: 1.25;
}

h3 {
  margin: 1.8em 0 0.5em;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink);
}

.lead { font-size: 19px; line-height: 1.75; }

.cap {
  font-size: 12px;
  line-height: 1.55;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

.num {
  font-size: 12px;
  color: var(--green);
  letter-spacing: 0.16em;
  display: block;
  margin-bottom: 10px;
}

/* ---------- portada ---------- */

.hero { align-items: start; }

.hero h1 { grid-column: 1 / span 8; }

.hero .card { grid-column: 9 / span 4; }

.hero-sub {
  grid-column: 1 / span 8;
  margin-top: 22px;
  color: var(--ink);
}

.card {
  border: 1px solid var(--line);
  padding: 16px 18px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 13px;
  font-family: var(--sans);
  letter-spacing: 0.14em;
  color: var(--green);
}

.card dl { margin: 0; }

.card dt {
  color: var(--ink);
  font-size: 13px;
  margin-top: 9px;
}

.card dt:first-child { margin-top: 0; }

.card dd { margin: 0; }

.card p { margin-bottom: 0.7em; }

.card a { color: var(--amber); }

.stack { display: grid; gap: 18px; align-content: start; }

/* ---------- imagen principal ---------- */

.figure-main { grid-column: 1 / span 5; margin: 0; }

.figure-main img { border: 1px solid rgba(228, 228, 225, 0.22); width: 100%; }

.figure-side { grid-column: 7 / span 4; align-self: end; }

.figure-side p { margin-bottom: 0.8em; }

/* ---------- texto ---------- */

.prose { grid-column: 1 / span 7; }

.aside { grid-column: 9 / span 4; align-self: start; }

.full { grid-column: 1 / span 12; }

.head { grid-column: 1 / span 7; }

ul.check, ol.steps {
  margin: 0 0 1.15em;
  padding-left: 20px;
}

ul.check { list-style: none; padding-left: 0; }

ul.check li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 9px;
}

ul.check li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 10px;
  height: 1px;
  background: var(--amber);
}

ol.steps li { margin-bottom: 9px; }

ol.steps::marker, ol.steps li::marker { color: var(--green); }

/* ---------- separadores ---------- */

.rule {
  position: relative;
  height: 1px;
  background: var(--line);
  margin: var(--rhythm) 0;
}

.rule::before,
.rule::after {
  content: '';
  position: absolute;
  top: -5px;
  width: 1px;
  height: 11px;
  background: var(--green);
}

.rule::before { left: 0; }
.rule::after { right: 0; }

.rule-note {
  margin: var(--rhythm) 0;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
}

.rule-note .card { grid-column: 9 / span 4; }

/* ---------- sección clara ---------- */

.contrast {
  background: var(--light);
  color: var(--ink-dark);
  margin: var(--rhythm) calc(-1 * var(--sheet-pad)) 0;
  padding: 52px var(--sheet-pad);
}

.contrast h2, .contrast h3 { color: var(--ink-dark); }

.contrast .num { color: #2c6d5e; }

.contrast .cap { color: #4a4f55; }

.contrast a { color: #8a5b12; border-bottom-color: rgba(138, 91, 18, 0.5); }

.contrast .figure-detail { grid-column: 8 / span 5; margin: 0; }

.contrast .figure-detail img { border: 1px solid rgba(20, 22, 26, 0.25); width: 100%; }

.contrast .prose { grid-column: 1 / span 6; }

.contrast ul.check li::before { background: #8a5b12; }

/* ---------- pie ---------- */

.foot {
  max-width: 1220px;
  margin: 64px auto 0;
  padding: 26px 0 44px;
}

.foot-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  align-items: baseline;
  padding-bottom: 16px;
}

.foot-name { font-family: var(--serif); font-size: 19px; letter-spacing: 0.05em; }

.foot-line { height: 1px; background: var(--line); }

.foot-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px 30px;
  padding-top: 16px;
}

.foot-bottom ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.foot-bottom ul a { color: var(--ink-soft); border-bottom-color: transparent; }

.foot-bottom ul a:hover { color: var(--ink); border-bottom-color: var(--amber); }

.foot-bottom p { max-width: 46ch; margin: 0; }

/* ---------- adaptación ---------- */

@media (max-width: 1000px) {
  :root { --sheet-pad: 34px; --gap: 22px; }
  body { padding: 26px 22px 0; }
  .hero h1 { grid-column: 1 / span 12; }
  .hero .card, .hero-sub { grid-column: 1 / span 12; }
  .figure-main { grid-column: 1 / span 7; }
  .figure-side { grid-column: 8 / span 5; }
  .prose, .head, .contrast .prose { grid-column: 1 / span 12; }
  .aside, .rule-note .card { grid-column: 1 / span 12; }
  .contrast .figure-detail { grid-column: 1 / span 7; }
}

@media (max-width: 640px) {
  :root { --rhythm: 26px; --sheet-pad: 20px; }
  body { padding: 18px 14px 0; font-size: 16px; }
  .grid, .rule-note { grid-template-columns: 1fr; }
  .hero h1, .hero .card, .hero-sub,
  .figure-main, .figure-side, .prose, .aside,
  .head, .full, .rule-note .card,
  .contrast .prose, .contrast .figure-detail { grid-column: 1; }
  .contrast { padding: 34px var(--sheet-pad); }
  .topbar nav ul { gap: 6px 18px; }
  .foot { margin-top: 40px; }
}

.sheet > section.contrast { margin-top: calc(var(--rhythm) * 2); }