/* =====================================================================
   Chip Design Club · Publicaciones interactivas
   Formato historia: una escena por pantalla, pensado para el celular.
   Paleta y tipografía de los posts originales.
   ===================================================================== */

@font-face { font-family: "Inter CDC"; src: url("../fonts/Inter-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Inter CDC"; src: url("../fonts/Inter-Medium.ttf") format("truetype"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Inter CDC"; src: url("../fonts/Inter-ExtraBold.ttf") format("truetype"); font-weight: 800; font-display: swap; }
@font-face { font-family: "Go Mono CDC"; src: url("../fonts/Go-Mono.ttf") format("truetype"); font-weight: 400; font-display: swap; }

:root {
  --bg: #05070d;
  --fg: #eef2f8;
  --mut: #8f99ad;
  --dim: #5b6478;
  --line: rgba(255, 255, 255, .12);
  --card: rgba(255, 255, 255, .04);
  --acc: #45e3b8;              /* Bio-SSG */
  --acc-dim: rgba(69, 227, 184, .16);
  --sans: "Inter CDC", system-ui, sans-serif;
  --mono: "Go Mono CDC", ui-monospace, monospace;
  --col: min(600px, 100%);
}
body[data-post="stdcell-ldo"] { --acc: #ffb13d; --acc-dim: rgba(255, 177, 61, .16); }
body[data-post="skyflow"]     { --acc: #d97757; --acc-dim: rgba(217, 119, 87, .16); }
body[data-post="riscv-rv32i"] { --acc: #7aa2ff; --acc-dim: rgba(122, 162, 255, .16); }

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); }
body { font-family: var(--sans); font-size: 17px; line-height: 1.5; -webkit-font-smoothing: antialiased; overscroll-behavior-y: none; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; }
.mono { font-family: var(--mono); letter-spacing: .02em; }
.acc { color: var(--acc); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }

/* ---------- barra superior: progreso tipo historia ---------- */
.top {
  position: fixed; inset: 0 0 auto; z-index: 30; padding: 10px 16px 14px;
  background: linear-gradient(to bottom, rgba(5, 7, 13, .96) 60%, transparent);
  display: flex; flex-direction: column; gap: 10px;
}
.bars { display: flex; gap: 5px; }
.bars i { flex: 1; height: 3px; background: rgba(255, 255, 255, .18); overflow: hidden; }
.bars i::after { content: ""; display: block; height: 100%; width: 0; background: var(--acc); transition: width .35s ease; }
.bars i.done::after { width: 100%; }
.bars i.now::after { width: 100%; }
.top .meta { display: flex; justify-content: space-between; align-items: center; gap: 14px; font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.top .meta a, .top .meta span { text-decoration: none; color: var(--mut); white-space: nowrap; }
.top .meta a:hover { color: var(--acc); }
.top .meta .u { text-transform: none; }

/* ---------- escenas ---------- */
.deck { position: relative; }
.scene {
  min-height: 100dvh; display: flex; align-items: center; justify-content: center;
  padding: 76px 20px 86px; position: relative;
}
.scene > .inner { width: var(--col); }
.scene.wide { --col: min(980px, 100%); }
.scene::after {  /* halo del color del proyecto */
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(700px 480px at 12% 0%, var(--acc-dim), transparent 70%);
}

/* secuencia: el lienzo queda fijo mientras se recorre el bloque */
.seq { position: relative; height: calc((var(--steps, 3) + 1) * 100dvh); }
.seq > .sticky { position: sticky; top: 0; height: 100dvh; display: flex; align-items: center; justify-content: center;
  padding: 76px 20px 86px; overflow: hidden; }
.seq .inner { width: var(--col); }
.seq.wide { --col: min(980px, 100%); }
.seq .step-label { min-height: 92px; margin-top: 16px; position: relative; }
.seq .step-label > div { position: absolute; inset: 0; opacity: 0; transform: translateY(10px);
  transition: opacity .35s ease, transform .35s ease; }
.seq .step-label > div.on { opacity: 1; transform: none; }
.seq .step-label .t { font-weight: 500; font-size: 19px; }
.seq .step-label .d { color: var(--mut); font-size: 15.5px; margin-top: 4px; line-height: 1.45; }
.seq .ticks { display: flex; gap: 5px; margin-top: 14px; }
.seq .ticks i { flex: 1; height: 2px; background: rgba(255,255,255,.16); }
.seq .ticks i.on { background: var(--acc); }

/* aparición escalonada */
.r { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; transition-delay: calc(var(--i, 0) * 80ms); }
.is-active .r { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .deck { scroll-behavior: auto; }
  .r { transition: none; opacity: 1; transform: none; }
}

[data-parallax] { will-change: transform; }

/* ---------- tipografía ---------- */
.kicker { font-family: var(--mono); font-size: 12.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--acc); }
h1, h2 { font-weight: 800; letter-spacing: -.03em; line-height: 1; margin: 14px 0 0; }
h1 { font-size: clamp(46px, 13vw, 88px); }
h2 { font-size: clamp(28px, 7.4vw, 44px); line-height: 1.05; }
p { margin: 14px 0 0; color: #c9d0dd; }
p b { color: var(--fg); font-weight: 500; }
.dim { font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--mut); line-height: 1.7; }
.dim .u, .u { text-transform: none; }

/* ---------- lámina de layout ---------- */
.plate { position: relative; border: 1px solid var(--line); overflow: hidden; touch-action: pan-y; }
.plate img { width: 100%; height: auto; }
/* la imagen y sus marcas se amplían juntas, para que las anotaciones no se descoloquen */
.plate .stage { position: relative; transform-origin: var(--ox, 50%) var(--oy, 50%); transition: transform .45s cubic-bezier(.3, .8, .3, 1); }
.plate.zoomed .stage { transform: scale(var(--z, 2.4)); }
.plate.seq-plate .stage { transition: none; }       /* el scroll manda: sin transición propia */
.plate .marker { position: absolute; border: 2px solid var(--acc); opacity: 0; transition: opacity .3s ease;
  box-shadow: 0 0 0 100vmax rgba(5,7,13,.55); }
.plate .marker.on { opacity: 1; }
.plate.zoomed .scalebar { opacity: 0; }
.plate.zoomed .hot span { transform: scale(calc(1 / var(--z, 2))); transform-origin: 0 0; }
/* láminas que deben caber en la pantalla: la altura manda sobre el ancho */
.plate.fit { display: flex; justify-content: center; }
.plate.fit img { max-height: var(--ph, 46dvh); width: auto; max-width: 100%; }
.hot {
  position: absolute; border: 2px solid transparent; background: transparent; cursor: pointer;
  transition: border-color .25s ease, background .25s ease, opacity .25s ease; padding: 0;
}
.hot span { position: absolute; left: -1px; top: -1px; width: 26px; height: 26px; display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; font-size: 13px; color: var(--bg); background: var(--acc); }
.hot[aria-pressed="true"] { border-color: var(--acc); background: var(--acc-dim); }
.plate.picked .hot:not([aria-pressed="true"]) { opacity: .25; }
.pins { position: absolute; left: 0; right: 0; bottom: 0; height: 14px; }
.pins b { position: absolute; bottom: 0; width: 6px; height: 12px; background: #ff5d8f; transform: translateX(-50%); }
/* barra de escala sobre la lámina: su ancho es un porcentaje real del layout */
.plate .scalebar { position: absolute; transition: opacity .3s ease; left: 12px; bottom: 12px; z-index: 2; font-family: var(--mono); font-size: 11px;
  color: #fff; text-shadow: 0 1px 3px rgba(0,0,0,.9); pointer-events: none; }
.plate .scalebar .bar { height: 6px; border: 2px solid #fff; border-top: 0; margin-top: 4px; }
.row { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; }

/* tarjeta de información del bloque seleccionado */
.info { margin-top: 14px; border: 1px solid var(--line); background: var(--card); padding: 16px 18px; min-height: 104px; }
.info .t { font-weight: 500; font-size: 19px; }
.info .t::before { content: attr(data-n) " · "; color: var(--acc); font-family: var(--mono); }
.info .d { color: var(--mut); font-size: 15.5px; margin-top: 6px; line-height: 1.45; }
.info.empty .d { color: var(--dim); }

/* ---------- etiquetas y datos ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip { font-family: var(--mono); font-size: 12.5px; padding: 8px 12px; border: 1px solid var(--line); background: var(--card); color: #cfd6e2; }
.chip.on { border-color: var(--acc); color: var(--acc); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 24px; }
.stat { border: 1px solid var(--line); background: var(--card); padding: 16px 14px; }
.stat .v { font-weight: 800; font-size: clamp(30px, 9vw, 46px); letter-spacing: -.03em; color: var(--acc); line-height: 1; }
.stat .k { font-size: 13.5px; color: var(--mut); margin-top: 8px; line-height: 1.3; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; border-top: 1px solid var(--line); }
td { padding: 13px 0; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 16px; line-height: 1.35; }
td.k { width: 38%; font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--mut); padding-top: 16px; }
.ref { font-size: 13.5px; color: var(--mut); line-height: 1.5; margin-top: 18px; }
.ref i { color: #c3cad7; }

/* ---------- equipo ---------- */
.person { display: grid; grid-template-columns: 76px 1fr; gap: 18px; align-items: center; margin-top: 26px; }
.avatar { width: 76px; height: 76px; border-radius: 50%; border: 2px solid var(--acc); display: grid; place-items: center;
  font-weight: 800; font-size: 26px; color: var(--acc); background: var(--acc-dim); overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.person .role { font-family: var(--mono); font-size: 11.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--acc); }
.person .name { font-weight: 800; font-size: clamp(22px, 6vw, 30px); letter-spacing: -.02em; line-height: 1.1; margin-top: 4px; }

/* ---------- cadena de señal (Bio-SSG) ---------- */
.screen { margin-top: 18px; border: 1px solid var(--line); background: #070a11; padding: 10px; }
.screen svg { width: 100%; height: auto; display: block; }

/* ---------- demostración del LDO ---------- */
.demo { margin-top: 20px; border: 1px solid var(--line); background: #070a11; padding: 16px; }
.demo svg { width: 100%; height: auto; display: block; }
.demo .grid { max-width: 460px; display: grid; grid-template-columns: repeat(16, 1fr); gap: 3px; margin-top: 14px; }
.demo .grid i { aspect-ratio: 1; background: rgba(255, 255, 255, .08); transition: background .18s ease; }
.demo .grid i.on { background: var(--acc); }
.demo .read { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 12.5px; color: var(--mut); margin-top: 14px; }
.demo .read b { color: var(--fg); font-weight: 400; }
.demo .leyenda { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--dim); margin-top: 10px; }

/* ---------- RISC-V: mapa funcional sobre el layout ---------- */
.plate .stage img.overlay { position: absolute; inset: 0; width: 100%; height: 100%; max-height: none; opacity: 0; pointer-events: none; }
.dot { display: inline-block; width: 10px; height: 10px; margin-right: 10px; background: var(--c); vertical-align: 1px; }
.leyenda-mapa { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 12px; font-family: var(--mono); font-size: 11.5px; color: var(--mut); }

/* ---------- RISC-V: los tres modos ---------- */
.modes svg { width: 100%; height: auto; max-height: 46dvh; display: block; margin: 0 auto; overflow: visible; }
.modes text { font-family: var(--mono); font-size: 12px; fill: #c3cad7; }
.modes text.hd { font-family: var(--sans); font-weight: 500; font-size: 13.5px; fill: var(--fg); }
.modes text.sm { font-size: 10.5px; fill: var(--mut); }
.modes text.req { font-size: 11px; fill: var(--acc); transition: opacity .25s ease; }
.modes text.out { font-size: 14px; fill: var(--fg); }
.modes .box { fill: rgba(255, 255, 255, .03); stroke: rgba(255, 255, 255, .16); }
.modes .pill rect { fill: none; stroke: rgba(255, 255, 255, .16); transition: fill .25s ease, stroke .25s ease; }
.modes .pill text { fill: var(--dim); transition: fill .25s ease; }
.modes .pill.on rect { fill: var(--acc-dim); stroke: var(--acc); }
.modes .pill.on text { fill: var(--acc); }
.modes .slot { fill: none; stroke: rgba(255, 255, 255, .14); transition: fill .15s ease, stroke .15s ease; }
.modes .slot.lleno { fill: var(--acc-dim); stroke: var(--acc); stroke-opacity: .55; }
.modes .slot.exec { fill: var(--acc); stroke: var(--acc); }
.modes .slot.viejo { fill: rgba(255, 255, 255, .04); stroke: rgba(255, 255, 255, .1); stroke-dasharray: 3 3; }
.modes .blk { fill: none; stroke: rgba(255, 255, 255, .16); transition: fill .2s ease, stroke .2s ease; }
.modes .blk.on { fill: var(--acc-dim); stroke: var(--acc); }
.modes .pc path { fill: var(--acc); }
.modes .pc text { font-size: 11px; fill: var(--acc); }
.modes .pc { transition: opacity .2s ease; }
.modes .flow line { stroke: rgba(255, 255, 255, .16); stroke-width: 2; transition: stroke .25s ease; }
.modes .flow path { fill: rgba(255, 255, 255, .16); transition: fill .25s ease; }
.modes .flow.on line { stroke: var(--acc); }
.modes .flow.on path { fill: var(--acc); }

/* ---------- RISC-V: niveles de verificación ---------- */
.levels { list-style: none; counter-reset: lv; margin: 20px 0 0; padding: 0; border-top: 1px solid var(--line); }
.levels li { counter-increment: lv; display: grid; grid-template-columns: 34px 1fr; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--line);
  font-size: 15.5px; line-height: 1.45; color: #c9d0dd; }
.levels li::before { content: "0" counter(lv); font-family: var(--mono); font-size: 12px; color: var(--acc); padding-top: 3px; }
.levels b { color: var(--fg); font-weight: 500; }
.term { margin: 18px 0 0; }
.term img { border: 1px solid var(--line); width: 100%; height: auto; }
.term figcaption { margin-top: 8px; }

/* ---------- notas técnicas plegables ---------- */
.notes details { border-top: 1px solid var(--line); }
.notes details:last-of-type { border-bottom: 1px solid var(--line); }
.notes summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 14px 0; font-weight: 500; font-size: 17px; }
.notes summary::-webkit-details-marker { display: none; }
.notes summary::after { content: "+"; font-family: var(--mono); font-size: 18px; color: var(--acc); }
.notes details[open] summary::after { content: "−"; }
.notes summary:focus-visible { outline: 2px solid var(--acc); outline-offset: 2px; }
.notes .body { padding: 0 0 16px; }
.notes .body p { font-size: 15px; line-height: 1.55; margin: 8px 0 0; }
.notes .mono { font-family: var(--mono); font-size: .92em; }
.notes a { color: var(--acc); }
.src { margin: 6px 0 0; padding-left: 20px; font-size: 14.5px; line-height: 1.55; color: #c9d0dd; }
.src li { margin-top: 6px; }

/* ---------- tira de Instagram ---------- */
.strip { display: flex; gap: 10px; overflow-x: auto; scroll-snap-type: x mandatory; margin-top: 18px; padding-bottom: 8px; }
.strip a { flex: 0 0 auto; scroll-snap-align: center; border: 1px solid var(--line); }
.strip img { height: min(46dvh, 420px); width: auto; }
.btn { display: inline-block; margin-top: 20px; text-decoration: none; border: 1px solid var(--acc); color: var(--acc); padding: 13px 20px; font-family: var(--mono); font-size: 13px; }
.btn:hover { background: var(--acc); color: var(--bg); }
.btn.solid { background: var(--acc); color: var(--bg); }

/* ---------- pista inferior: invita a seguir bajando ---------- */
.hint { position: fixed; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); z-index: 30; pointer-events: none;
  display: inline-flex; align-items: center; gap: 12px; padding: 10px 16px 10px 18px; white-space: nowrap;
  border: 1px solid var(--acc); background: rgba(5, 7, 13, .86); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--fg);
  transform: translateX(-50%); transition: opacity .4s ease, transform .4s ease; animation: pulso 2.4s ease-in-out infinite; }
.hint.gone { opacity: 0; transform: translate(-50%, 12px); }
.hint b { display: block; font-size: 19px; line-height: 1; color: var(--acc); animation: bob 1.1s ease-in-out infinite; }
@keyframes bob { 0%, 100% { transform: translateY(-3px) } 50% { transform: translateY(4px) } }
@keyframes pulso { 0%, 100% { box-shadow: 0 0 0 0 var(--acc-dim) } 50% { box-shadow: 0 0 0 9px rgba(0, 0, 0, 0) } }
@media (prefers-reduced-motion: reduce) { .hint, .hint b { animation: none } }

/* ---------- portada del sitio ---------- */
.home { padding: 90px 20px 60px; }
.home .inner { width: min(980px, 100%); margin: 0 auto; }
.cards { display: grid; gap: 18px; margin-top: 30px; }
@media (min-width: 720px) { .cards { grid-template-columns: 1fr 1fr; } }
.card { display: block; text-decoration: none; border: 1px solid var(--line); background: var(--card); transition: border-color .2s ease, transform .2s ease; }
.card:hover { border-color: var(--acc); transform: translateY(-3px); }
.card .ph { aspect-ratio: 4 / 5; overflow: hidden; border-bottom: 1px solid var(--line); }
.card .ph img { width: 100%; height: 100%; object-fit: cover; }
/* tarjeta de una app: el icono centrado en vez de un recorte de la interfaz */
.card .ph.mark { display: grid; place-items: center;
                 background: radial-gradient(118% 88% at 50% 38%, rgba(0, 158, 49, .20), transparent 68%), #080b12; }
.card .ph.mark img { width: 46%; height: auto; object-fit: contain; }
.card .tx { padding: 18px 20px 22px; }
.card h3 { font-weight: 800; font-size: 26px; letter-spacing: -.02em; margin: 6px 0 4px; }
.card p { font-size: 15px; margin-top: 4px; }
.card .go { display: inline-block; margin-top: 12px; font-family: var(--mono); font-size: 12.5px; color: var(--acc); }
.foot { margin-top: 48px; padding-top: 18px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* pantallas cortas: todo un poco más compacto para que la escena siga cabiendo */
@media (max-height: 720px) {
  .scene { padding: 64px 18px 70px; }
  h1 { font-size: clamp(34px, 11vw, 62px); }
  h2 { font-size: clamp(24px, 6.6vw, 34px); }
  p { font-size: 15.5px; }
  td { padding: 10px 0; font-size: 15px; }
  .person { margin-top: 18px; }
  .stat .v { font-size: clamp(26px, 8vw, 36px); }
  .ref { font-size: 12.5px; }
}

/* pantallas de altura media: tablas más densas para que la ficha quepa completa */
@media (max-height: 900px) {
  td { padding: 10px 0; font-size: 15.5px; }
  td.k { padding-top: 13px; }
  .ref { font-size: 12.5px; margin-top: 14px; }
  .btn { margin-top: 16px; }
}