/* ============================================================
   SEUSCALA — sistema (nav, tipo, botones, folio)
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; }

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

.skip {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 90;
  padding: 0.55rem 0.9rem;
  background: var(--lima);
  color: var(--lima-ink);
  font-weight: 600;
  text-decoration: none;
}
.skip:focus { top: 0.7rem; }

.wrap {
  width: min(var(--wrap), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

/* grano de papel — detalle de seuweb, en lima/tinta */
.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.9'/></svg>");
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: var(--progress, 0%);
  background: var(--lima);
  z-index: var(--z-progress);
  pointer-events: none;
}

.folio {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--text-faint);
}
.section--paper .folio { color: var(--ink-dim); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.15rem;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--lima);
}
.kicker::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: currentColor;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 95%;
  letter-spacing: var(--track-display);
  line-height: var(--leading-tight);
  margin: 0;
  text-wrap: balance;
}

h1 { font-size: var(--text-hero); }
h2 { font-size: var(--text-section); }
h3 { font-size: var(--text-card); font-weight: 700; }

.mark {
  font-family: var(--font-mark);
  font-style: italic;
  font-weight: 560;
  letter-spacing: -0.02em;
  color: var(--lima);
}

.lede {
  max-width: var(--prose);
  margin: 1.2rem 0 0;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.5;
  color: var(--text-dim);
  text-wrap: pretty;
}
.section--paper .lede { color: var(--ink-dim); }

.section { padding-block: var(--space-section); }
.section--paper {
  background: var(--paper);
  color: var(--ink-text);
}
.section--ink-2 { background: var(--ink-2); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.15rem;
  padding: 0.75rem 1.4rem;
  border: 1px solid transparent;
  background: var(--lima);
  color: var(--lima-ink);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 600;
  letter-spacing: -0.012em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur-ui) var(--ease-ui),
              border-color var(--dur-ui) var(--ease-ui),
              color var(--dur-ui) var(--ease-ui),
              transform var(--dur-ui) var(--ease-ui);
}
.btn:hover { background: var(--lima-deep); }
@media (hover: hover) and (pointer: fine) {
  .btn:active { transform: translateY(1px); }
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-2);
}
.btn--ghost:hover {
  background: transparent;
  border-color: var(--lima);
  color: var(--lima);
}

/* ---- nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(7, 7, 7, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(var(--wrap), 100% - var(--gutter) * 2);
  margin-inline: auto;
}
.nav__brand {
  display: grid;
  gap: 0.1rem;
  text-decoration: none;
  color: var(--text);
}
.nav__word {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.04em;
  line-height: 1;
}
.nav__word i {
  font-family: var(--font-mark);
  font-style: italic;
  font-weight: 560;
  color: var(--lima);
}
.nav__loc {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.nav__links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__links a {
  font-size: var(--text-small);
  font-weight: 500;
  text-decoration: none;
  color: var(--text-dim);
}
.nav__links a:hover { color: var(--text); }
.nav__cta { min-height: 2.45rem; padding-inline: 1rem; }
.nav__toggle { display: none; color: var(--text); padding: 0.4rem; cursor: pointer; }

.drawer {
  display: none;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
  padding: 0.5rem var(--gutter) 1.4rem;
}
.drawer.is-open { display: grid; gap: 0.35rem; }
.drawer a {
  display: block;
  padding: 0.7rem 0;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

@media (max-width: 780px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__toggle { display: grid; }
}

.footer {
  padding-block: 3.5rem;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: var(--text-small);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
}
.footer a { text-decoration: none; }
.footer a:hover { color: var(--lima); }
.footer small { display: block; margin-top: 0.7rem; color: var(--text-faint); }

@media (max-width: 720px) {
  .footer__grid { grid-template-columns: 1fr; }
}