:root {
  --papel: #f3f1ec;
  --tinta: #1b1b1a;
  --tenue: #8a877f;
  --linea: rgba(27, 27, 26, 0.08);
  --serif: "Cormorant Garamond", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --lento: 1.6s cubic-bezier(.2, .7, .2, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-tema="claro"]) {
    --papel: #0f0f0e;
    --tinta: #e8e5dd;
    --tenue: #77746c;
    --linea: rgba(232, 229, 221, 0.07);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--papel);
  color: var(--tinta);
  font-family: var(--serif);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Grilla técnica sutil, fija detrás de todo */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--linea) 1px, transparent 1px),
    linear-gradient(90deg, var(--linea) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

#figura {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }

.barra {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: lowercase;
  z-index: 10;
}
.marca { margin-right: auto; opacity: .85; }
#nav { display: flex; gap: 22px; }
#nav a { color: var(--tenue); transition: color .6s; }
#nav a:hover, #nav a:focus-visible { color: var(--tinta); }

.idioma {
  background: none;
  border: 0;
  padding: 7px 4px;
  font: inherit;
  letter-spacing: inherit;
  color: var(--tenue);
  cursor: pointer;
  transition: color .6s;
}
.idioma:hover, .idioma:focus-visible { color: var(--tinta); }

.sonido {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: 1px solid var(--linea);
  border-radius: 999px;
  padding: 7px 14px;
  font: inherit;
  color: var(--tenue);
  letter-spacing: inherit;
  cursor: pointer;
  transition: color .6s, border-color .6s;
}
.sonido:hover, .sonido:focus-visible, .sonido[aria-pressed="true"] { color: var(--tinta); border-color: var(--tenue); }
.sonido-onda { display: inline-flex; gap: 2px; align-items: flex-end; height: 10px; }
.sonido-onda i { width: 1.5px; height: 2px; background: currentColor; transition: height .8s; }
.sonido[aria-pressed="true"] .sonido-onda i { animation: onda 2.4s ease-in-out infinite; }
.sonido-onda i:nth-child(2) { animation-delay: -.6s !important; }
.sonido-onda i:nth-child(3) { animation-delay: -1.2s !important; }
.sonido-onda i:nth-child(4) { animation-delay: -1.8s !important; }
@keyframes onda { 0%, 100% { height: 2px; } 50% { height: 10px; } }

main { position: relative; z-index: 1; }

.portada {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 0 16px 9vh;
  text-align: center;
}
.coordenada {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--tenue);
  margin: 0 0 18px;
}
.frase {
  font-weight: 300;
  font-style: italic;
  font-size: clamp(22px, 3.2vw, 34px);
  letter-spacing: .02em;
  margin: 0;
  opacity: 0;
  animation: aparecer 4s cubic-bezier(.2, .7, .2, 1) .8s forwards;
}
.bajar {
  margin-top: 36px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--tenue);
  opacity: 0;
  animation: aparecer 3s ease 3s forwards;
}
@keyframes aparecer { to { opacity: 1; } }

.seccion {
  min-height: 80vh;
  max-width: 760px;
  margin: 0 auto;
  padding: 18vh 16px 10vh;
}
.seccion-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--tenue);
}
.seccion h2 {
  font-weight: 300;
  font-size: clamp(34px, 5vw, 56px);
  margin: 10px 0 6px;
  letter-spacing: .01em;
}
.seccion .bajada { color: var(--tenue); font-style: italic; margin: 0 0 48px; font-size: 19px; }
.lista { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--linea); }
.lista li { border-bottom: 1px solid var(--linea); padding: 18px 0; display: flex; gap: 20px; align-items: baseline; }
.lista .fecha { font-family: var(--mono); font-size: 10px; color: var(--tenue); min-width: 64px; letter-spacing: .1em; }
.lista .t { font-size: 22px; }
.lista .nota { display: block; color: var(--tenue); font-size: 16px; margin-top: 4px; }
.lista a.t { transition: opacity .6s; }
.lista a.t:hover { opacity: .6; }
.vacio { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; color: var(--tenue); }
.vacio::before { content: "— "; }

.revelar { opacity: 0; transform: translateY(14px); transition: opacity var(--lento), transform var(--lento); }
.revelar.visto { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .revelar { opacity: 1; transform: none; transition: none; }
  .frase, .bajar { animation: none; opacity: 1; }
}

.pie {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 10vh 16px 40px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--tenue);
}

@media (max-width: 560px) {
  .barra { padding: 16px; gap: 14px; }
  #nav { display: none; }
}