:root {
  color-scheme: light dark;
  --papel: #f3efe6;
  --tinta: #1a1712;
  --tenue: #6b6456;
  --acento: #c8410b;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
  --margen: clamp(16px, 5vw, 72px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --papel: #15130f;
    --tinta: #f1ebdd;
    --tenue: #a39a88;
    --acento: #ff8a4c;
  }
}

* { box-sizing: border-box; margin: 0; }

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--papel);
  color: var(--tinta);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
}

header { padding: clamp(24px, 4vw, 40px) var(--margen) 0; }

.marca {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

main {
  align-self: center;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: 24px;
  padding: clamp(56px, 10vh, 120px) var(--margen);
}

h2 {
  grid-column: 1 / span 3;
  padding-top: 0.9em;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--tenue);
}

.frase {
  grid-column: 4 / -1;
  max-width: 19em;
  font-size: clamp(2.05rem, 5.3vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

.frase em { color: var(--acento); }

.en {
  grid-column: 4 / -1;
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--tenue);
}

.texto {
  grid-column: 4 / -1;
  max-width: 34em;
  font-size: 1.2rem;
  line-height: 1.55;
}

.texto p + p { margin-top: 14px; }

a { color: inherit; text-underline-offset: 3px; }
a.marca { text-decoration: none; }
.enlaces { display: inline-flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 20px; }

footer { padding: 0 var(--margen) clamp(20px, 3vw, 32px); }

.regla {
  position: relative;
  height: 17px;
  border-top: 1px solid var(--tinta);
  background-image:
    repeating-linear-gradient(90deg, var(--tinta) 0 1px, transparent 1px 12px),
    repeating-linear-gradient(90deg, var(--tinta) 0 1px, transparent 1px 60px);
  background-size: 100% 6px, 100% 15px;
  background-repeat: no-repeat;
}

/* La marca que corre sobre la regla al abrir la página. */
.regla::after {
  content: "";
  position: absolute;
  top: -8px;
  left: 62%;
  border: 6px solid transparent;
  border-bottom-width: 0;
  border-top: 7px solid var(--acento);
  animation: medir 1.5s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

@keyframes medir { from { left: 0; } }

@media (prefers-reduced-motion: reduce) {
  .regla::after { animation: none; }
}

footer p {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--tenue);
}

@media (max-width: 760px) {
  h2, .frase, .en, .texto { grid-column: 1 / -1; }
  h2 { padding-top: 0; margin-bottom: 16px; }
}