/* Genarte.ai · Issue #01 — site da apresentação · Mote atelier · v12 (telemóvel primeiro)
   Grelha: a da revista (3 colunas, margens largas, fólios em cima) levada para o ecrã:
   6 colunas no telemóvel, 12 no computador; margens, calhas, tipo e espaço fluidos (método Utopia, 360→1440px). */
@font-face { font-family: 'Plus Jakarta Sans'; src: url('../fonts/PlusJakartaSans-var.woff2') format('woff2'); font-weight: 200 800; font-style: normal; font-display: swap; }
@font-face { font-family: 'Plus Jakarta Sans'; src: url('../fonts/PlusJakartaSans-Italic-var.woff2') format('woff2'); font-weight: 200 800; font-style: italic; font-display: swap; }

:root {
  --noite: #00023F;
  --rosa: #FF85FE;
  --eletrico: #292DB3;
  --menta: #70E891;
  --ambar: #FFAB55;
  --fogo: #C74514;
  --fundo: #02031A;
  --papel: #F2F1F6;
  --ink: #FFFFFF;
  --ink-soft: rgba(255, 255, 255, 0.64);
  --solid: transparent;
  --font: 'Plus Jakarta Sans', 'Helvetica Neue', Arial, sans-serif;
  /* escala de tipo fluida (método Utopia): 16px·1.2 a 360px → 18px·1.25 a 1440px */
  --step-n2: clamp(0.6944rem, 0.6859rem + 0.0379vi, 0.7200rem); /* 11.1→11.5px */
  --step-n1: clamp(0.8333rem, 0.8111rem + 0.0988vi, 0.9000rem); /* 13.3→14.4px */
  --step-0: clamp(1.0000rem, 0.9583rem + 0.1852vi, 1.1250rem); /* 16.0→18.0px */
  --step-1: clamp(1.2000rem, 1.1312rem + 0.3056vi, 1.4062rem); /* 19.2→22.5px */
  --step-2: clamp(1.4400rem, 1.3341rem + 0.4708vi, 1.7578rem); /* 23.0→28.1px */
  --step-3: clamp(1.7280rem, 1.5716rem + 0.6952vi, 2.1973rem); /* 27.6→35.2px */
  --step-4: clamp(2.0736rem, 1.8493rem + 0.9970vi, 2.7466rem); /* 33.2→43.9px */
  --step-5: clamp(2.4883rem, 2.1734rem + 1.3999vi, 3.4332rem); /* 39.8→54.9px */
  --step-6: clamp(2.9860rem, 2.5508rem + 1.9341vi, 4.2915rem); /* 47.8→68.7px */
  --step-7: clamp(3.5832rem, 2.9894rem + 2.6389vi, 5.3644rem); /* 57.3→85.8px */
  /* escala de espaço fluida (base = step-0) */
  --space-3xs: clamp(0.2500rem, 0.2396rem + 0.0463vi, 0.2812rem);
  --space-2xs: clamp(0.5000rem, 0.4792rem + 0.0926vi, 0.5625rem);
  --space-xs: clamp(0.7500rem, 0.7188rem + 0.1389vi, 0.8438rem);
  --space-s: clamp(1.0000rem, 0.9583rem + 0.1852vi, 1.1250rem);
  --space-m: clamp(1.5000rem, 1.4375rem + 0.2778vi, 1.6875rem);
  --space-l: clamp(2.0000rem, 1.9167rem + 0.3704vi, 2.2500rem);
  --space-xl: clamp(3.0000rem, 2.8750rem + 0.5556vi, 3.3750rem);
  --space-2xl: clamp(4.0000rem, 3.8333rem + 0.7407vi, 4.5000rem);
  --space-3xl: clamp(6.0000rem, 5.7500rem + 1.1111vi, 6.7500rem);
  --space-4xl: clamp(8.0000rem, 7.6667rem + 1.4815vi, 9.0000rem);
  --space-xs-s: clamp(0.7500rem, 0.6250rem + 0.5556vi, 1.1250rem);
  --space-s-m: clamp(1.0000rem, 0.7708rem + 1.0185vi, 1.6875rem);
  --space-s-l: clamp(1.0000rem, 0.5833rem + 1.8519vi, 2.2500rem);
  --space-m-l: clamp(1.5000rem, 1.2500rem + 1.1111vi, 2.2500rem);
  --space-m-xl: clamp(1.5000rem, 0.8750rem + 2.7778vi, 3.3750rem);
  --space-l-xl: clamp(2.0000rem, 1.5417rem + 2.0370vi, 3.3750rem);
  --space-l-2xl: clamp(2.0000rem, 1.1667rem + 3.7037vi, 4.5000rem);
  --space-xl-2xl: clamp(3.0000rem, 2.5000rem + 2.2222vi, 4.5000rem);
  --space-xl-3xl: clamp(3.0000rem, 1.7500rem + 5.5556vi, 6.7500rem);
  --space-2xl-4xl: clamp(4.0000rem, 2.3333rem + 7.4074vi, 9.0000rem);
  /* grelha: margens e calhas (a revista usa 3 colunas e margens de ~51pt em 595pt) */
  --margem: clamp(1.5000rem, 0.6667rem + 3.7037vi, 4.0000rem);
  --calha: clamp(0.7500rem, 0.5000rem + 1.1111vi, 1.5000rem);
  --cols: 6;
  /* tamanhos de mostra (números e frases grandes) */
  --display-1: clamp(5.5rem, 1.6rem + 26vw, 15rem);
  --display-2: clamp(3rem, 1rem + 8vw, 9rem);
  /* inícios e fins de ecrã (por baixo da barra de cima e por cima do fim do ecrã) */
  --topo: calc(env(safe-area-inset-top, 0px) + var(--space-s-m));
  --baixo: calc(env(safe-area-inset-bottom, 0px) + var(--space-xl-3xl));
  --hud-h: calc(var(--topo) + 2.75rem + var(--space-m-l)); /* barra + ar até à cabeça de cada ecrã */
  color-scheme: dark;
}
:root.ink-dark { --ink: #00023F; --ink-soft: rgba(0, 2, 63, 0.68); }

* { box-sizing: border-box; }
/* v31 · só para leitores de ecrã */
.sr { position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
html { background: var(--fundo); -webkit-text-size-adjust: 100%; }
body { margin: 0; color: var(--ink); font: 400 var(--step-0)/1.5 var(--font); -webkit-font-smoothing: antialiased; transition: color .5s; overflow-x: hidden; }
html.vw-open { overflow: hidden; }
img { max-width: 100%; display: block; }
h1, h2, h3, p, blockquote, ol, ul, figure { margin: 0; }

/* ---------- grelha ---------- */
.grelha { display: grid; grid-template-columns: repeat(var(--cols), minmax(0, 1fr)); column-gap: var(--calha); padding-inline: var(--margem); width: 100%; }
.grelha > * { grid-column: 1 / -1; min-width: 0; }

/* ---------- etiquetas e texto (a mesma escala em todo o site) ---------- */
.kicker, .periodo, .book-cap em, .autor, .ficha li, .editorial footer, .intro-t {
  font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft); }
.kicker { display: flex; align-items: center; gap: var(--space-2xs); margin-bottom: var(--space-s); }
.dot { width: .62rem; height: .62rem; border-radius: 50%; flex: none; display: inline-block; }
.dot.vazio { border: 1px solid currentColor; opacity: .6; }

/* fundo da marca: escuro, com um brilho azul e o feixe magenta dos renders */
#fundo { position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 45% at 50% 30%, rgba(41, 45, 179, 0.45), transparent 70%),
    linear-gradient(118deg, transparent 36%, rgba(120, 60, 255, 0.12) 45%, rgba(255, 82, 200, 0.16) 51%, rgba(255, 130, 60, 0.08) 54%, transparent 64%),
    var(--fundo);
}
#fundo::after { content: ''; position: absolute; inset: 0; background: var(--solid); transition: background-color .7s ease; }
/* v12 · o fundo vivo (js/fundo.js): desenhado a meia resolução e esticado; se não houver WebGL, fica o #fundo */
#fundo-vivo { position: fixed; left: 0; top: 0; width: 100vw; height: 100vh; height: 100lvh; z-index: 0; pointer-events: none; display: none; }
.fundo-vivo #fundo-vivo { display: block; }
#gl { position: fixed; inset: 0; width: 100vw; height: 100vh; height: 100lvh; z-index: 1; pointer-events: none; transition: opacity .2s linear; }
main { position: relative; z-index: 2; }

/* grão de filme, muito leve (da v01) */
#grao { position: fixed; inset: -50%; z-index: 4; pointer-events: none; opacity: .07; 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='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 1.4 -0.2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grao .9s steps(4) infinite; }
/* v10 · leve: no telemóvel não há grão (a mistura por cima do 3D custa a cada frame) */
@media (pointer: coarse) { #grao { display: none; } }
@keyframes grao { 0% { transform: translate(0, 0); } 25% { transform: translate(-3%, 2%); } 50% { transform: translate(2%, -3%); } 75% { transform: translate(-2%, -1%); } }

/* ---------- abertura: os pontos de Humano e IA formam a flor enquanto carrega ---------- */
#intro { position: fixed; inset: 0; z-index: 60; background: var(--fundo); display: grid; align-content: end;
  transition: opacity .9s ease .25s, visibility 0s 1.2s; }
#intro::before { content: ''; position: absolute; inset: 0;
  background: radial-gradient(45% 35% at 50% 42%, rgba(41, 45, 179, .45), transparent 70%),
    linear-gradient(118deg, transparent 38%, rgba(120, 60, 255, .1) 46%, rgba(255, 82, 200, .12) 51%, transparent 60%); } /* v12 · já com o feixe do fundo vivo */
#intro-pontos { position: absolute; inset: 0; width: 100%; height: 100%; }
.intro-base { position: relative; padding-bottom: var(--baixo); }
.intro-carga { display: flex; align-items: center; gap: var(--space-xs); }
.intro-flor { width: 2.4rem; height: 2.4rem; overflow: visible; flex: none; }
.intro-flor .mp { opacity: .18; transition: opacity .35s; }
.intro-flor .mp.on { opacity: 1; }
.intro-pct { font: 300 var(--step-n1)/1 var(--font); letter-spacing: .1em; font-variant-numeric: tabular-nums; color: var(--ink-soft); min-width: 3.2em; }
.intro-t { color: var(--ink); }
html.pronto #intro { opacity: 0; visibility: hidden; pointer-events: none; }

/* ---------- barra de cima (os rótulos da capa, como os fólios da revista) ---------- */
.hud { position: fixed; z-index: 10; top: 0; left: 0; right: 0; display: flex; align-items: center; gap: var(--space-3xs);
  padding: var(--topo) var(--margem) 0; pointer-events: none; }
.pill { font: 700 var(--step-n2)/1 var(--font); letter-spacing: .08em; text-transform: uppercase; padding: .62em 1em .55em; border-radius: 999px;
  white-space: nowrap; pointer-events: auto; text-decoration: none; transition: color .5s, background-color .5s, border-color .5s; }
.pill-fill { background: var(--ink); color: var(--fundo); border: 1px solid var(--ink); }
:root.ink-dark .pill-fill { color: #fff; }
.pill-line { color: var(--ink); border: 1px solid var(--ink); }
#miniflor { all: unset; pointer-events: auto; margin-left: auto; width: 2.4rem; height: 2.4rem; cursor: pointer; flex: none; }
#miniflor svg { width: 100%; height: 100%; overflow: visible; display: block; }
#miniflor:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 50%; }
.mf-anel { fill: none; stroke: color-mix(in srgb, var(--ink) 22%, transparent); stroke-width: 3; }
.mf-prog { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 0 100; transform: rotate(-90deg); transition: stroke .5s; }
#miniflor .mp { transition: opacity .35s; }

/* ecrãs presos (sticky): o conteúdo assenta na grelha, entre a barra de cima e o fundo do ecrã */
.sticky { position: sticky; top: 0; height: 100svh; }
.ecra { height: 100%; align-content: end; padding-block: var(--hud-h) var(--baixo); row-gap: var(--space-m); }
.sec { position: relative; }
/* cabeça de cada ecrã: como os fólios da revista (secção à esquerda, página à direita), com um filete */
.cabeca { display: flex; justify-content: space-between; align-items: center; gap: var(--space-s); align-self: start;
  font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft);
  padding-bottom: var(--space-2xs); border-bottom: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); }
.cabeca > span { display: inline-flex; align-items: center; gap: var(--space-2xs); }
/* palco: o lugar da grelha onde o 3D (os pontos, a flor) se compõe */
.palco { min-height: 0; pointer-events: none; }

/* ---------- entrada ---------- */
.hero { height: 240svh; }
.hero .ecra { grid-template-rows: 1fr auto; align-content: stretch; }
.hero-txt { grid-column: 1 / -1; grid-row: 2; position: relative; z-index: 1; text-shadow: 0 2px 28px rgba(2, 3, 26, .7); }
.hero .palco { grid-column: 1 / -1; grid-row: 1 / span 2; } /* v20 · as esferas ocupam o ecrã todo; o texto fica por cima, em baixo */
.missao { font: 300 var(--step-3)/1.1 var(--font); letter-spacing: -.025em; max-width: 17ch; text-wrap: balance; }
.missao .forte { font-weight: 700; letter-spacing: -.03em; } /* v15 · pesos misturados: as palavras-chave a negrito */
.periodo { margin-top: var(--space-m); }
.wm { display: inline-block; overflow: clip; vertical-align: top; padding-bottom: .08em; margin-bottom: -.08em; }
.wm > span { display: inline-block; transform: translateY(105%); transition: transform 1s cubic-bezier(.2, .75, .15, 1); transition-delay: calc(.35s + var(--i) * 32ms); }
html.pronto .wm > span { transform: none; }
.periodo { opacity: 0; transition: opacity 1s 1.2s; }
html.pronto .periodo { opacity: 1; }
.tag3d { position: fixed; left: 0; top: 0; z-index: 3; pointer-events: none; opacity: 0; will-change: transform, opacity; }
.tag3d span { display: inline-block; transform: translate(-50%, -100%); font: 700 var(--step-n2)/1 var(--font); letter-spacing: .1em; text-transform: uppercase;
  padding: .62em 1em .55em; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .7); color: #fff; background: rgba(2, 3, 26, .35); backdrop-filter: blur(6px); }
.tag-petala { transition: opacity .3s; }
.tag-petala span { transform: translate(-50%, -50%); border: 0; color: #fff; background: var(--c, #4b50ff); font-variant-numeric: tabular-nums; box-shadow: 0 0 0 4px color-mix(in srgb, var(--c, #4b50ff) 30%, transparent); }
.desce { position: absolute; left: 50%; bottom: calc(env(safe-area-inset-bottom, 0px) + var(--space-s)); translate: -50% 0; }
.desce span { display: block; width: 1px; height: var(--space-xl); background: linear-gradient(var(--ink), transparent); transform-origin: top; animation: desce 2.2s ease-in-out infinite; }
@keyframes desce { 0% { transform: scaleY(0); opacity: 1; } 60% { transform: scaleY(1); opacity: 1; } 100% { transform: scaleY(1); opacity: 0; } }

/* ---------- chave ---------- */
.chave { height: 360svh; }
.chave .ecra { grid-template-rows: auto 1fr auto; align-content: stretch; }
.chave-frase { font: 500 var(--step-1)/1.3 var(--font); max-width: 26ch; text-wrap: balance; margin-bottom: var(--space-m); }
.chave-lista { list-style: none; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xs) var(--calha); }
.chave-lista li { display: grid; grid-template-columns: auto 1fr; column-gap: var(--space-2xs); align-items: baseline;
  padding-top: var(--space-2xs); border-top: 1px solid color-mix(in srgb, var(--ink) 18%, transparent); transition: opacity .4s, border-color .4s; }
.chave-lista.ativa li { opacity: .34; }
.chave-lista li.on { opacity: 1; border-color: var(--c); }
.cl-n { font: 300 var(--step-2)/1 var(--font); color: var(--c); font-variant-numeric: tabular-nums; grid-row: span 2; }
.cl-t { font: 600 var(--step-n1)/1.25 var(--font); }
.cl-v { font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft); }

/* ---------- editorial ---------- */
.editorial { height: 180svh; }
.editorial .ecra { grid-template-rows: auto 1fr; align-content: stretch; }
/* a citação ocupa a página: o texto a meio, a assinatura em baixo, na mesma linha da grelha */
.editorial blockquote { align-self: stretch; display: grid; grid-template-rows: 1fr auto; row-gap: var(--space-m); padding-top: var(--space-l-xl); }
.editorial blockquote p { align-self: start; font: italic 400 var(--step-4)/1.2 var(--font); letter-spacing: -.018em; text-wrap: pretty; max-width: 24ch; }
.editorial footer { display: flex; align-items: center; gap: var(--space-2xs); padding-top: var(--space-2xs); border-top: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); }
.acende .pw { opacity: .2; transition: opacity .35s; }
.acende .pw.on { opacity: 1; }
.editorial footer { opacity: 0; transform: translateY(10px); transition: opacity .6s, transform .6s; }
.editorial footer.on { opacity: 1; transform: none; }

/* ---------- fita ---------- */
.fita { height: 260svh; } /* v15 · mais curta: três paragens, uma por pergunta */
.fita .ecra { grid-template-rows: auto 1fr auto; align-content: stretch; }
.fita .perguntas { grid-row: 3; }
.fita .palco { grid-column: 1 / -1; grid-row: 2; } /* v26 · explícito: o número do capítulo também vive na linha 2 */
.perguntas { position: relative; list-style: none; padding: 0; display: grid; gap: var(--space-xs); }
.perguntas li { font: 500 var(--step-3)/1.1 var(--font); letter-spacing: -.025em; max-width: 16ch; text-wrap: balance;
  opacity: .14; transform: translateY(10px); transition: opacity .6s, transform .6s; }
.perguntas li.on { opacity: 1; transform: none; }
.perguntas li.passou { opacity: .38; transform: none; }
/* v26 · cada pergunta é um capítulo: o número dele aparece em grande, com a cor do capítulo, como luz */
/* v27 · no telemóvel: a toda a largura, à esquerda, por baixo da fita e por cima das perguntas (como o número dos capítulos) */
/* v28 · o número roda como um contador (01 → 02 → 03; o /03 fica), devagar, e a cor passa de um capítulo para o outro */
@property --c { syntax: '<color>'; inherits: true; initial-value: #ffffff; }
.fita-n { grid-row: 2; grid-column: 1 / -1; justify-self: start; align-self: end; display: flex; pointer-events: none; margin: 0 0 calc(var(--space-xs) * -1 - .1em) -.04em;
  font: 200 min(calc((100vw - 2 * var(--margem)) / 2.62), 30svh)/1 var(--font); letter-spacing: -.06em; font-variant-numeric: tabular-nums; white-space: nowrap;
  --c: #ffffff; opacity: 0; transform: translateY(.12em); transition: --c 1.4s ease, opacity .9s, transform 1.1s cubic-bezier(.2, .8, .2, 1);
  filter: drop-shadow(0 0 .14em color-mix(in srgb, var(--c) 55%, transparent)) drop-shadow(0 0 .5em color-mix(in srgb, var(--c) 30%, transparent)); }
.fita-n.on { opacity: 1; transform: none; }
.fn-roda { display: block; height: 1em; overflow: hidden; -webkit-mask-image: linear-gradient(transparent, #000 13%, #000 87%, transparent); mask-image: linear-gradient(transparent, #000 13%, #000 87%, transparent); }
.fn-col { display: flex; flex-direction: column; transform: translateY(calc(var(--s, 0) * -1em)); transition: transform 1.25s cubic-bezier(.7, 0, .2, 1); }
.fn-col > span, .fn-tot { display: block; height: 1em; padding-right: .04em;
  background: linear-gradient(172deg, color-mix(in srgb, var(--c) 28%, #fff) 8%, var(--c) 55%, color-mix(in srgb, var(--c) 72%, #02031A) 92%);
  -webkit-background-clip: text; background-clip: text; color: transparent; }
@media (prefers-reduced-motion: reduce) { .fita-n, .fn-col { transition: opacity .3s; } .fita-n { transform: none; } }
/* v28 · a pergunta acesa acende palavra a palavra */
.perguntas .w { display: inline-block; }
.perguntas li.on .w { animation: palavra .9s cubic-bezier(.2, .8, .2, 1) both; animation-delay: calc(var(--i) * 55ms + 120ms); }
@keyframes palavra { from { opacity: .14; transform: translateY(.32em); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .perguntas li.on .w { animation: none; } }

/* ---------- capítulos: número e pergunta em cima, o índice das peças em baixo (como a abertura de um capítulo da revista) ---------- */
.ato-capa { min-height: 100svh; grid-template-rows: auto 1fr auto; row-gap: var(--space-l); padding-block: var(--hud-h) var(--baixo); }
.ato-capa > div { opacity: 0; transform: translateY(30px); transition: opacity 1s, transform 1s cubic-bezier(.2, .7, .2, 1); }
.ato-capa > div.in { opacity: 1; transform: none; }
.ato-capa > .ato-indice { grid-row: 3; transition-delay: .15s; }
/* v15 · o número do capítulo, gigante, com luz por trás (referência: a tipografia como objeto de luz).
   Escuro nos capítulos de tinta branca (como nos separadores da revista); claro no capítulo de tinta escura (Menta).
   v19 · nítido: sem desfoque (o desfoque via-se como má qualidade) e a luz só larga e suave, por trás. */
.ato-capa { position: relative; overflow: clip; container-type: inline-size; }
.ato-n { position: relative; z-index: 0; grid-row: 1; pointer-events: none; user-select: none; white-space: nowrap;
  font: 300 calc((100vw - 2 * var(--margem)) / 2.7)/.8 var(--font);
  /* v16 · à medida da largura da secção (100cqi é a largura entre as margens, sem a barra de scroll): «01/03» mede 2,6 vezes o tamanho da letra */
  font-size: calc(100cqi / 2.64); letter-spacing: -.06em; font-variant-numeric: tabular-nums; margin-left: -.05em;
  --num: #00023F; --halo: color-mix(in srgb, var(--c, #fff) 45%, #fff);
  color: var(--num);
  text-shadow: 0 0 .3em color-mix(in srgb, var(--halo) 42%, transparent);
  opacity: 0; transform: translateY(.06em);
  transition: opacity 1.1s, transform 1.4s cubic-bezier(.2, .7, .2, 1); }
.ato-n.in { opacity: 1; transform: none; }
.ato-capa[data-tom="claro"] .ato-n { --num: #ffffff; --halo: #ffffff; text-shadow: 0 0 .3em rgba(255, 255, 255, .5); }
.ato-capa > .ato-cab, .ato-capa > .ato-indice { position: relative; z-index: 1; }
.ato-t { font: 500 var(--step-4)/1.08 var(--font); letter-spacing: -.025em; margin-top: var(--space-m); max-width: 15ch; text-wrap: balance; }
.ato-indice .cabeca { margin-bottom: var(--space-2xs); }
.ato-indice ol { list-style: none; padding: 0; display: grid; }
.ato-indice li { display: grid; grid-template-columns: auto 1fr auto; column-gap: var(--space-2xs); align-items: baseline;
  padding-block: var(--space-2xs); border-bottom: 1px solid color-mix(in srgb, var(--ink) 16%, transparent); }
.ato-indice .dot { align-self: center; }
.ai-nome { font: 600 var(--step-n1)/1.25 var(--font); text-wrap: balance; }
.ai-pg { font: 400 var(--step-n1)/1.25 var(--font); font-variant-numeric: tabular-nums; color: var(--ink-soft); white-space: nowrap; }
.ai-tipo { grid-column: 2; font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft); }

/* ---------- a revista (flipbook): o livro é desenhado em WebGL por cima de .book ---------- */
.flip { position: relative; height: calc((var(--v, 2) - 1) * 62svh + 100svh); }
.flip > .sticky { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-xs);
  padding: var(--hud-h) 0 calc(env(safe-area-inset-bottom, 0px) + var(--space-l)); }
.flip { --lw: min(calc(100vw - 16px), calc((100svh - 13rem) * 1.5011), 1360px); }
.book-cab, .book-wrap, .book-cap { width: var(--lw); }
.book-cab { display: flex; justify-content: space-between; gap: var(--space-s); padding-bottom: var(--space-2xs); border-bottom: 1px solid color-mix(in srgb, var(--ink) 20%, transparent);
  font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft); }
.book-rot { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.book-n { flex: none; font-variant-numeric: tabular-nums; }
.book-wrap { position: relative; }
.book { aspect-ratio: 2052 / 1367; width: 100%; background: transparent center / cover no-repeat; }
.no-webgl .book { background-color: var(--papel); box-shadow: 0 40px 80px -20px rgba(0, 0, 0, .55); }
.book-hit { all: unset; position: absolute; inset: 0; cursor: zoom-in; }
.book-hit:focus-visible { outline: 2px solid var(--ink); outline-offset: 6px; }
.book-cap { display: flex; align-items: baseline; flex-wrap: wrap; gap: var(--space-3xs) var(--space-2xs); min-height: 2.8em; font: 500 var(--step-n1)/1.35 var(--font); }
.book-cap .dot { align-self: center; }
.book-cap b { font-weight: 800; font-variant-numeric: tabular-nums; }
/* progresso das duplas (no telemóvel): um traço por dupla; tocar num traço leva a essa dupla */
.book-nav { display: none; width: var(--lw); }
.book-prog { display: flex; gap: 4px; }
.book-prog button { all: unset; flex: 1; padding: 14px 0; cursor: pointer; }
.book-prog i { display: block; height: 2px; border-radius: 2px; background: color-mix(in srgb, var(--ink) 22%, transparent); transition: background-color .4s; }
.book-prog .passou i { background: color-mix(in srgb, var(--ink) 55%, transparent); }
.book-prog .on i { background: var(--ink); }
.book-prog button:focus-visible i { outline: 2px solid var(--ink); outline-offset: 4px; }
.book-dica { font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft); text-align: center; transition: opacity .6s; }
.book-dica.fora { opacity: 0; }
/* ecrã tátil: as duplas viram com swipe, a secção já não precisa de ser longa */
.flip.swipe { height: 150svh; }
.flip.swipe > .sticky { touch-action: pan-y; }
.flip.uma { height: 150svh; } /* uma só dupla: pousa, fica um instante e sai */
.flip.uma .book-nav { visibility: hidden; }

/* ---------- v15 · desdobrável: os seis painéis em papel dobrado (js/cronologia.js); desdobra-se e desliza painel a painel ---------- */
.desdobravel { height: 420svh; }
.desdobravel .ecra { grid-template-rows: auto 1fr auto; align-content: stretch; }
.desdobravel > .sticky { overflow: clip; } /* a tira passa para fora do ecrã: não pode alargar a página (no telemóvel afastava tudo) */
.desd-palco { position: relative; min-height: 0; perspective: 1700px; perspective-origin: 50% 45%; }
.desd-tira { position: absolute; left: 50%; top: 50%; width: 0; transform: translateY(-50%); transform-style: preserve-3d; }
.desd-painel { all: unset; box-sizing: border-box; position: absolute; left: 0; top: 0; cursor: zoom-in; transform-origin: 0 50%; backface-visibility: hidden;
  background: #f4f2ee; box-shadow: 0 30px 60px -24px rgba(2, 3, 26, .55); will-change: transform; }
.desd-painel img { display: block; width: 100%; height: 100%; object-fit: cover; pointer-events: none; -webkit-user-select: none; user-select: none; }
/* a dobra: os painéis virados para o outro lado ficam na sombra; uma luz fina na aresta do monte */
.desd-painel::after { content: ''; position: absolute; inset: 0; pointer-events: none; opacity: var(--s, 0);
  background: linear-gradient(90deg, rgba(2, 3, 26, .55), rgba(2, 3, 26, .25) 40%, rgba(2, 3, 26, .4)); }
.desd-painel:nth-child(odd)::before { content: ''; position: absolute; right: 0; top: 0; bottom: 0; width: 18%; pointer-events: none; z-index: 1;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .22)); opacity: calc(var(--s, 0) * 4); }
.desd-painel:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
.desd-txt { position: relative; pointer-events: none; grid-row: 3; }
.desd-txt { display: grid; justify-items: start; gap: var(--space-m); }
.desd-txt h2 { font: 300 var(--step-5)/1.02 var(--font); letter-spacing: -.035em; max-width: 14ch; }
.desd-ver { pointer-events: auto; }

/* ---------- v24 · abrir a revista: um momento (a revista em 3D é desenhada no #gl, por cima do .palco) ---------- */
.abrir { height: 330svh; }
.abrir .ecra { grid-template-rows: auto minmax(0, 1fr) auto; align-content: stretch; row-gap: var(--space-s); }
.abrir .cabeca { grid-column: 1 / -1; grid-row: 1; }
.abrir .palco, .abrir-livro { grid-column: 1 / -1; grid-row: 2; }
.abrir-livro { all: unset; position: relative; z-index: 1; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.no-webgl .abrir { height: auto; }
.no-webgl .abrir .sticky { position: relative; height: auto; }
.no-webgl .abrir-livro, .no-webgl .abrir-folio { display: none; }
.abrir-base { grid-column: 1 / -1; grid-row: 3; display: grid; align-items: end; position: relative; z-index: 2; }
.abrir-folio, .abrir-cta { grid-area: 1 / 1; }
.abrir-folio { display: grid; justify-items: start; gap: var(--space-2xs); opacity: 0; pointer-events: none; }
.abrir-folio b { font: 200 var(--step-7)/.92 var(--font); letter-spacing: -.045em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.af-nome { display: flex; align-items: center; gap: .55em; min-height: 1.3em; font: 500 var(--step-1)/1.2 var(--font); letter-spacing: -.01em; text-wrap: balance; max-width: 30ch; }
.af-nome .dot[hidden] { display: none; }
.af-dica { font: 700 var(--step-n2)/1.2 var(--font); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.abrir-cta { display: grid; justify-items: start; gap: var(--space-s); }
.abrir-cta .fim-big { max-width: 11ch; }

/* ---------- fecho: contacto da autora (um formulário que envia um email à Carlota) ---------- */
.fim .ecra { min-height: 100svh; height: auto; grid-template-rows: auto minmax(34svh, 1fr) auto auto; align-content: stretch;
  padding-block: var(--hud-h) calc(env(safe-area-inset-bottom, 0px) + var(--space-l)); }
.fim-txt { display: grid; gap: var(--space-xl); align-self: center; }
.fim-bloco { display: grid; justify-items: start; gap: var(--space-s); padding-top: var(--space-s); border-top: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); }
.fim-bloco .kicker { margin: 0; }
.fim-big { font: 500 var(--step-5)/1 var(--font); letter-spacing: -.035em; max-width: 12ch; text-wrap: balance; }
.fim-nome { font: 500 var(--step-2)/1.15 var(--font); letter-spacing: -.02em; }
.fim-email { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2xs) var(--space-s); font: 400 var(--step-0)/1.3 var(--font); color: var(--ink-soft); }
.fim-email > span { user-select: all; overflow-wrap: anywhere; }
.fim-email .falta { color: var(--ambar); }
.fim-ou { color: var(--ink-soft); }
/* o formulário */
.form { display: grid; gap: var(--space-s); width: 100%; max-width: 36rem; position: relative; }
.campo { display: grid; gap: .45em; }
.campo label { font: 700 var(--step-n2)/1 var(--font); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.campo input, .campo textarea { font: 400 max(16px, var(--step-0))/1.4 var(--font); color: var(--ink); width: 100%; margin: 0; padding: .8em 1em; border-radius: 16px;
  background: color-mix(in srgb, var(--ink) 6%, transparent); border: 1px solid color-mix(in srgb, var(--ink) 26%, transparent);
  -webkit-appearance: none; appearance: none; transition: border-color .2s, background-color .2s; }
.campo textarea { min-height: 8.5em; resize: vertical; }
.campo input::placeholder, .campo textarea::placeholder { color: var(--ink-soft); }
.campo input:hover, .campo textarea:hover { border-color: color-mix(in srgb, var(--ink) 45%, transparent); }
.campo input:focus, .campo textarea:focus { outline: none; border-color: var(--rosa); background: color-mix(in srgb, var(--ink) 10%, transparent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--rosa) 30%, transparent); }
.campo [aria-invalid="true"] { border-color: var(--ambar); }
.campo .erro { font-size: var(--step-n1); color: var(--ambar); }
.campo .erro:empty { display: none; }
.mel { position: absolute; left: -9999px; top: 0; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.form-base { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-xs) var(--space-s); }
.form-base .botao[disabled] { opacity: .55; cursor: progress; }
.form-estado { font-size: var(--step-n1); line-height: 1.4; color: var(--ink-soft); max-width: 34ch; }
.form-estado.ok { color: var(--menta); font-weight: 600; }
.form-estado.erro { color: var(--ambar); }
:root.ink-dark .form-estado.ok { color: var(--noite); }
.copiar { all: unset; cursor: pointer; font: 700 var(--step-n2)/1 var(--font); letter-spacing: .12em; text-transform: uppercase; color: var(--ink); padding: .5em 0; border-bottom: 1px solid currentColor; user-select: none; }
.copiar[hidden] { display: none; }
.copiar:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
/* botões (a mesma família das pílulas da barra de cima) */
.botao { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 1.5em; border-radius: 999px; text-decoration: none; cursor: pointer;
  font: 700 var(--step-n1)/1 var(--font); letter-spacing: .08em; text-transform: uppercase; transition: background-color .25s, color .25s, border-color .25s; }
.botao-cheio { background: var(--ink); color: var(--fundo); border: 1px solid var(--ink); }
.botao-cheio:hover { background: var(--rosa); border-color: var(--rosa); color: var(--noite); }
.botao-linha { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
.botao-linha:hover { background: var(--ink); color: var(--fundo); }
.botao:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.ficha { list-style: none; padding: var(--space-s) 0 0; display: flex; flex-direction: column; gap: var(--space-3xs);
  border-top: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); }
.ficha li { font-size: max(11px, calc(var(--step-n2) * .85)); } /* v31 · nunca menos de 11 px (no telemóvel ficava com 9) */

/* ---------- visualizador ---------- */
#viewer { position: fixed; inset: 0; z-index: 40; background: rgba(2, 3, 26, .97); display: flex; flex-direction: column; opacity: 0; transition: opacity .3s; }
#viewer.on { opacity: 1; }
#viewer[hidden] { display: none; }
.vw-scroll { flex: 1; min-height: 0; overflow: auto; display: flex; align-items: center; justify-content: safe center; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; }
.vw-scroll img { max-width: 100%; max-height: 100%; width: auto; height: auto; margin: auto; cursor: zoom-in; }
#viewer.z .vw-scroll img { max-width: none; max-height: none; width: 180%; cursor: zoom-out; }
@media (orientation: portrait) {
  /* revista no telemóvel: dentro das margens; fólio em cima, a dupla e a legenda ao meio, o progresso em baixo */
  .flip { --lw: calc(100vw - 2 * var(--margem)); }
  .flip > .sticky { display: grid; grid-template-rows: auto 1fr auto auto 1fr auto; justify-items: start; align-content: stretch;
    padding: var(--hud-h) var(--margem) var(--baixo); row-gap: var(--space-s); }
  .book-cab { grid-row: 1; }
  .book-wrap { grid-row: 3; }
  .book-cap { grid-row: 4; display: grid; grid-template-columns: auto auto 1fr; align-items: center; column-gap: var(--space-2xs); row-gap: var(--space-3xs); min-height: 0; }
  .book-cap .nm { grid-row: 2; grid-column: 1 / -1; font: 500 var(--step-3)/1.08 var(--font); letter-spacing: -.02em; text-wrap: balance; min-height: 2.16em; }
  .book-nav { display: block; grid-row: 6; }
  /* duplas e desdobrável: à altura do ecrã, desliza-se para os lados */
  #viewer.wide .vw-scroll { justify-content: flex-start; }
  #viewer.wide .vw-scroll img { max-width: none; max-height: none; height: min(100%, 120vw); width: auto; }
  #viewer.wide.z .vw-scroll img { height: 100%; width: auto; }
}
.vw-cap { padding: var(--space-xs) var(--margem) calc(env(safe-area-inset-bottom, 0px) + var(--space-s)); font: 500 var(--step-n1)/1.3 var(--font); color: #fff; text-align: center; }
.vw-close { position: absolute; top: var(--topo); right: var(--margem); width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .5); background: rgba(2, 3, 26, .6); color: #fff; font: 300 26px/1 var(--font); cursor: pointer; display: grid; place-items: center; }
.vw-close:hover { background: #fff; color: var(--noite); }

.no-webgl #gl { display: none; }

/* ---------- computador: 12 colunas ---------- */
@media (min-width: 900px) and (orientation: landscape) {
  :root { --cols: 12; }
  .missao { font-size: var(--step-4); max-width: 19ch; }
  .perguntas li { font-size: var(--step-4); }
  .chave-frase { font-size: var(--step-2); }
  .editorial blockquote p { font-size: var(--step-5); max-width: 23ch; }
  /* entrada: texto à esquerda, em baixo; o palco ocupa a metade direita */
  .hero .ecra { grid-template-rows: 1fr auto; }
  .hero .palco { grid-column: 1 / -1; grid-row: 1 / span 2; } /* v20 · o palco da entrada é o ecrã inteiro */
  .hero-txt { grid-column: 1 / span 6; grid-row: 2; }
  /* chave: cabeça; texto e lista à esquerda; a flor à direita */
  .chave .ecra { grid-template-rows: auto 1fr; }
  .chave .palco { grid-column: 7 / -1; grid-row: 2; }
  .chave-txt { grid-column: 1 / span 5; grid-row: 2; align-self: center; }
  .editorial blockquote { grid-column: 3 / span 8; }
  .editorial footer { max-width: 50%; }
  .perguntas { grid-column: 1 / span 6; }
  /* v26 · no computador, o número do capítulo enche o lado direito, em baixo, ao lado das perguntas */
  .fita-n { grid-row: 3; grid-column: 7 / -1; justify-self: end; margin: 0 0 -.1em; font-size: min(16.5vw, 32svh); }
  /* capítulo: o número em cima à esquerda, a pergunta em baixo à esquerda, o índice em baixo à direita */
  /* v16 · o número em cima, inteiro e dentro das margens; a pergunta e o índice por baixo, sem se sobreporem
     (em ecrãs baixos a secção cresce, em vez de o índice ficar por cima do número) */
  .ato-n { grid-row: 1; } /* o tamanho: à largura (como no telemóvel); js/main.js (ajustarAtos) reduz se não couber na altura do ecrã */
  .ato-capa > .ato-cab { grid-column: 1 / span 5; grid-row: 3; align-self: end; }
  .ato-cab .ato-t { margin: 0; }
  /* v19 · o índice em duas colunas: mais baixo, para o capítulo caber num ecrã (uma página) */
  .ato-capa > .ato-indice { grid-column: 6 / -1; grid-row: 3; align-self: end; }
  .ato-indice ol { grid-template-columns: 1fr 1fr; column-gap: var(--calha); }
  .ato-t { font-size: var(--step-5); }
  .ai-nome { font-size: var(--step-0); }
  .ai-pg { font-size: var(--step-n1); }
  .flip { height: calc((var(--v, 2) - 1) * 72svh + 100svh); --lw: min(calc((100vw - 2 * var(--margem)) * .86), calc((100svh - 14rem) * 1.5011), 1360px); }
  .desdobravel { height: 380svh; }
  /* v15 · os painéis grandes: o período numa linha, com o botão ao lado */
  .desd-txt { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-s) var(--space-l); }
  .desd-txt h2 { font-size: var(--step-3); max-width: none; }
  /* v24 · abrir a revista: a revista grande, à direita; o fólio e o convite em baixo, à esquerda */
  .abrir .palco, .abrir-livro { grid-column: 4 / -1; grid-row: 1 / span 3; }
  .abrir-base { grid-column: 1 / span 4; grid-row: 3; }
  .abrir .cabeca { position: relative; z-index: 2; }
  /* fecho: cabeça; o contacto (formulário) à esquerda, a flor à direita; ficha técnica numa linha em baixo */
  .fim .ecra { grid-template-rows: auto 1fr auto; }
  .fim .palco { grid-column: 7 / -1; grid-row: 2; min-height: 56svh; }
  .fim-txt { grid-column: 1 / span 5; grid-row: 2; gap: var(--space-l); }
  .fim-bloco { gap: var(--space-xs); }
  .fim-big { font-size: var(--step-4); max-width: 16ch; }
  .ficha { grid-column: 1 / -1; grid-row: 3; flex-direction: row; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2xs) var(--space-m); }
}
@media (prefers-reduced-motion: reduce) {
  .desce span, #grao { animation: none; }
  .wm > span { transition: none; transform: none; }
  .acende .pw, .editorial footer { opacity: 1; transform: none; }
  .ato-capa > div, .ato-n { transition: none; opacity: 1; transform: none; }
  .chave-lista li { transition: none; }
}

/* ---------- v14 · a revista inteira (js/leitor.js): o livro em WebGL no #gl, os controlos aqui por cima ---------- */
/* entradas: a pílula da barra de cima, os flipbooks, o índice de cada capítulo, o fecho */
.pill-ler { all: unset; box-sizing: border-box; cursor: pointer; pointer-events: auto; display: inline-flex; align-items: center; gap: .5em;
  font: 700 var(--step-n2)/1 var(--font); letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; padding: .62em 1em .55em; border-radius: 999px;
  background: var(--rosa); color: var(--noite); border: 1px solid var(--rosa); transition: background-color .25s, border-color .25s, color .25s; }
.pill-ler:hover { background: #fff; border-color: #fff; }
.pill-ler:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.pill-ler svg { width: 1.15em; height: 1.15em; flex: none; }
@media (max-width: 620px) { .hud .pill-ano { display: none; } }
@media (max-width: 480px) { .hud .pill-issue { display: none; } }
.pill-ler[hidden], .fim-bloco[hidden], .lt-desd[hidden] { display: none; }
.hud .pill-ler { margin-left: auto; }
.hud .pill-ler:not([hidden]) + #miniflor { margin-left: var(--space-2xs); }
.no-webgl .ai-ler { cursor: default; pointer-events: none; }
.no-webgl .ai-ler .ai-pg::after { display: none; }
.ato-indice li { display: block; padding: 0; }
.ai-ler { all: unset; box-sizing: border-box; width: 100%; cursor: pointer; display: grid; grid-template-columns: auto 1fr auto; column-gap: var(--space-2xs); align-items: baseline;
  padding-block: var(--space-2xs); }
.ai-ler .dot { align-self: center; }
.ai-ler .ai-pg::after { content: '→'; display: inline-block; margin-left: .45em; opacity: .5; transition: transform .25s, opacity .25s; }
.ai-ler:hover .ai-nome { text-decoration: underline; text-underline-offset: .18em; text-decoration-thickness: 1px; }
.ai-ler:hover .ai-pg::after { opacity: 1; transform: translateX(3px); }
.ai-ler:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.fim-btns { display: flex; flex-wrap: wrap; gap: var(--space-2xs); }

/* aberto: o site fica parado por baixo, o fundo vivo escurece, o livro fica ao centro */
html.lt-aberto, html.lt-aberto body { overflow: hidden; }
html.lt-aberto main, html.lt-aberto .hud, html.lt-aberto .tag3d, html.lt-aberto #grao { visibility: hidden; }
html.lt-aberto #gl { opacity: 1 !important; transition: none; }
body::before { content: ''; position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: 0; transition: opacity .4s;
  background: radial-gradient(120% 90% at 50% 46%, rgba(2, 3, 26, .38), rgba(2, 3, 26, .86)); }
html.lt-aberto body::before { opacity: 1; }

#leitor { position: fixed; inset: 0; z-index: 30; --ink: #fff; --ink-soft: rgba(255, 255, 255, .62); color: var(--ink); opacity: 0; transition: opacity .35s; }
#leitor.on { opacity: 1; }
#leitor[hidden] { display: none; }
.lt-palco { position: absolute; inset: 0; touch-action: none; cursor: grab; -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
.lt-palco:active { cursor: grabbing; }
.lt-topo, .lt-base, .lt-seta, .lt-desd, .lt-dica { transition: opacity .3s; }
#leitor.lt-limpo .lt-topo, #leitor.lt-limpo .lt-base, #leitor.lt-limpo .lt-desd, #leitor.lt-limpo .lt-dica { opacity: 0; pointer-events: none; }
#leitor.lt-limpo .lt-topo *, #leitor.lt-limpo .lt-base * { pointer-events: none; }

/* barra de cima: onde estás (página, peça e a cor do tipo de conteúdo) · índice · fechar */
.lt-topo { position: absolute; z-index: 3; top: 0; left: 0; right: 0; display: flex; align-items: center; gap: var(--space-s);
  padding: var(--topo) var(--margem) var(--space-2xs); pointer-events: none; }
.lt-marca { display: none; gap: var(--space-3xs); flex: none; }
.lt-marca .pill { pointer-events: none; }
.lt-onde { flex: 1; min-width: 0; display: flex; align-items: center; gap: var(--space-2xs); font: 500 var(--step-n1)/1.25 var(--font); }
.lt-onde .dot.vazio { opacity: .5; }
.lt-pg { font-weight: 800; font-variant-numeric: tabular-nums; white-space: nowrap; }
.lt-pg:empty { display: none; }
.lt-nome { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink-soft); }
.lt-acoes { display: flex; gap: var(--space-3xs); flex: none; pointer-events: auto; }
.lt-btn { all: unset; box-sizing: border-box; cursor: pointer; display: inline-grid; place-items: center; height: 2.6rem; min-width: 2.6rem; padding: 0 1.05em; border-radius: 999px;
  font: 700 var(--step-n2)/1 var(--font); letter-spacing: .08em; text-transform: uppercase; color: #fff; border: 1px solid rgba(255, 255, 255, .42);
  background: rgba(2, 3, 26, .42); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); transition: background-color .2s, color .2s, border-color .2s; }
.lt-btn:hover, .lt-btn[aria-expanded="true"] { background: #fff; color: var(--noite); border-color: #fff; }
.lt-btn:focus-visible, .lt-seta:focus-visible, .lt-zoom button:focus-visible, .lt-grupos button:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.lt-fechar { padding: 0; }
#leitor:focus { outline: none; }
/* v25 · ícones desenhados (o ×, as setas, o − e o + eram letras da fonte e não ficavam ao centro do círculo) */
.ico { display: block; width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; pointer-events: none; }
.lt-seta .ico { width: 1.6rem; height: 1.6rem; }
.lt-zoom .ico, .book-seta .ico { width: 1.15rem; height: 1.15rem; }

/* setas (só no computador) */
.lt-seta { all: unset; box-sizing: border-box; position: absolute; z-index: 2; top: 50%; width: 3.2rem; height: 3.2rem; margin-top: -1.6rem; border-radius: 50%; cursor: pointer;
  display: grid; place-items: center; color: #fff; border: 1px solid rgba(255, 255, 255, .34); background: rgba(2, 3, 26, .36);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); font: 300 1.9rem/1 var(--font); transition: background-color .2s, color .2s, opacity .3s; }
.lt-seta span { margin-top: -.12em; }
.lt-seta:hover:not(:disabled) { background: #fff; color: var(--noite); }
.lt-seta:disabled { opacity: .18; cursor: default; }
.lt-ant { left: var(--margem); }
.lt-seg { right: var(--margem); }

/* desdobrável: aparece na dupla da cronologia */
.lt-desd { position: absolute; z-index: 2; left: 0; top: 0; min-height: 44px; white-space: nowrap; color: var(--noite); border-color: var(--ambar);
  background: var(--ambar); box-shadow: 0 10px 30px rgba(2, 3, 26, .35); }
.lt-desd:hover { background: #fff; border-color: #fff; color: var(--noite); }
/* com a página ampliada, um véu atrás das barras para se lerem por cima da página */
.lt-topo::before, .lt-base::before { content: ''; position: absolute; z-index: -1; left: 0; right: 0; pointer-events: none; opacity: 0; transition: opacity .3s; }
.lt-topo::before { top: 0; bottom: -2.5rem; background: linear-gradient(rgba(2, 3, 26, .78), rgba(2, 3, 26, 0)); }
.lt-base::before { top: -2.5rem; bottom: 0; background: linear-gradient(rgba(2, 3, 26, 0), rgba(2, 3, 26, .78)); }
#leitor.lt-ampliado .lt-topo::before, #leitor.lt-ampliado .lt-base::before { opacity: 1; }

/* barra de baixo: régua com os capítulos (as cores dos separadores) e a miniatura; zoom */
.lt-base { position: absolute; z-index: 2; left: 0; right: 0; bottom: 0; display: flex; align-items: center; gap: var(--space-s);
  padding: var(--space-2xs) var(--margem) calc(env(safe-area-inset-bottom, 0px) + var(--space-s)); }
.lt-regua { position: relative; flex: 1; min-width: 0; height: 44px; }
.lt-caps { position: absolute; left: 7px; right: 7px; top: 50%; height: 3px; margin-top: -1.5px; border-radius: 3px; background: rgba(255, 255, 255, .2); pointer-events: none; }
.lt-caps i { position: absolute; top: 0; bottom: 0; border-radius: 3px; opacity: .85; }
.lt-range { -webkit-appearance: none; appearance: none; position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; background: transparent; cursor: pointer; touch-action: none; }
.lt-range::-webkit-slider-runnable-track { height: 3px; background: transparent; }
.lt-range::-moz-range-track { height: 3px; background: transparent; }
.lt-range::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; margin-top: -5.5px; border-radius: 50%; background: #fff; border: 0; box-shadow: 0 0 0 4px rgba(2, 3, 26, .5), 0 0 18px rgba(255, 133, 254, .7); }
.lt-range::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 0; box-shadow: 0 0 0 4px rgba(2, 3, 26, .5), 0 0 18px rgba(255, 133, 254, .7); }
.lt-range:focus-visible { outline: 2px solid #fff; outline-offset: 2px; border-radius: 6px; }
.lt-previa { position: absolute; bottom: calc(100% + 6px); width: 7.2rem; transform: translateX(-50%); display: grid; gap: .4rem; justify-items: center; pointer-events: none;
  opacity: 0; transition: opacity .2s; }
.lt-previa.on { opacity: 1; }
.lt-previa i { display: block; width: 100%; aspect-ratio: 210 / 280; border-radius: 2px; background-color: #f4f2ee; background-repeat: no-repeat; box-shadow: 0 14px 40px rgba(0, 0, 0, .55); }
.lt-previa span { font: 700 var(--step-n2)/1.25 var(--font); letter-spacing: .06em; text-align: center; max-width: 14rem; text-wrap: balance;
  background: rgba(2, 3, 26, .7); padding: .3em .6em; border-radius: 4px; }
.lt-zoom { display: flex; gap: var(--space-3xs); flex: none; }
.lt-zoom button { all: unset; box-sizing: border-box; cursor: pointer; width: 2.6rem; height: 2.6rem; border-radius: 50%; display: grid; place-items: center;
  border: 1px solid rgba(255, 255, 255, .34); font: 300 1.35rem/1 var(--font); color: #fff; background: rgba(2, 3, 26, .36); transition: background-color .2s, color .2s; }
.lt-zoom button:hover { background: #fff; color: var(--noite); }

/* dica (some ao primeiro virar) */
.lt-dica { position: absolute; z-index: 2; left: 0; right: 0; bottom: calc(env(safe-area-inset-bottom, 0px) + 4.6rem); text-align: center; pointer-events: none;
  font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft); padding-inline: var(--margem); }
.lt-dica.fora { opacity: 0; }

/* índice: painel à direita (no telemóvel, o ecrã inteiro) */
.lt-indice { position: absolute; z-index: 2; top: 0; right: 0; bottom: 0; width: min(100%, 27rem); overflow-y: auto; overscroll-behavior: contain;
  padding: calc(var(--topo) + 3.6rem) var(--margem) calc(env(safe-area-inset-bottom, 0px) + var(--space-xl));
  background: rgba(2, 3, 26, .9); -webkit-backdrop-filter: blur(22px) saturate(1.3); backdrop-filter: blur(22px) saturate(1.3);
  border-left: 1px solid rgba(255, 255, 255, .1); animation: lt-entra .35s cubic-bezier(.2, .7, .2, 1); }
@keyframes lt-entra { from { opacity: 0; transform: translateX(24px); } }
.lt-indice .cabeca { margin-bottom: var(--space-s); }
.lt-grupos { display: grid; gap: var(--space-l); }
.lt-grupos h3 { display: flex; align-items: center; gap: var(--space-2xs); font: 700 var(--step-n2)/1.3 var(--font); letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-soft); padding-bottom: var(--space-2xs); border-bottom: 1px solid rgba(255, 255, 255, .2); }
.lt-grupos ol { list-style: none; padding: 0; }
.lt-grupos button { all: unset; box-sizing: border-box; width: 100%; cursor: pointer; display: grid; grid-template-columns: auto 1fr auto; align-items: baseline; column-gap: var(--space-2xs);
  padding: .62rem .4rem; border-bottom: 1px solid rgba(255, 255, 255, .08); border-radius: 2px; transition: background-color .15s; }
.lt-grupos button:hover { background: rgba(255, 255, 255, .07); }
.lt-grupos button[aria-current="true"] { background: rgba(255, 133, 254, .14); }
.lt-grupos .dot { align-self: center; }
.li-nome { font: 600 var(--step-n1)/1.3 var(--font); }
.li-pg { font: 400 var(--step-n1)/1.3 var(--font); color: var(--ink-soft); font-variant-numeric: tabular-nums; white-space: nowrap; }

@media (min-width: 900px) and (orientation: landscape) {
  .lt-marca { display: flex; }
  .lt-onde { justify-content: center; }
}
@media (pointer: coarse) {
  .lt-seta, .lt-zoom { display: none; }
}
@media (pointer: coarse) and (orientation: portrait) {
  .lt-indice { width: 100%; border-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .lt-indice { animation: none; }
}
.botao-ler { background: var(--rosa); color: var(--noite); border: 1px solid var(--rosa); }
.botao-ler:hover { background: #fff; border-color: #fff; }

/* ---------- v15 · referências: luz, vidro, grelha ---------- */
/* a grelha fina da entrada, por trás das esferas: Humano e IA encontram-se sobre ela (no ponto onde se tocam há um cruzamento) */
#grade { position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0; --gx: 75vw; --gy: 50vh; --passo: clamp(40px, 4.2vw, 68px);
  background-image: linear-gradient(rgba(196, 186, 255, .17) 1px, transparent 1px), linear-gradient(90deg, rgba(196, 186, 255, .17) 1px, transparent 1px);
  background-size: var(--passo) var(--passo); background-position: calc(var(--gx) - .5px) calc(var(--gy) - .5px);
  -webkit-mask-image: radial-gradient(circle at var(--gx) var(--gy), #000 0, rgba(0, 0, 0, .55) 16vmax, transparent 34vmax);
  mask-image: radial-gradient(circle at var(--gx) var(--gy), #000 0, rgba(0, 0, 0, .55) 16vmax, transparent 34vmax); }
html.lt-aberto #grade, .no-webgl #grade { visibility: hidden; }
/* o leitor em vidro fosco, com a aresta acesa (referência: os painéis de vidro) */
.lt-btn, .lt-seta, .lt-zoom button { background: linear-gradient(160deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, .02) 60%), rgba(14, 14, 52, .4);
  border-color: rgba(255, 255, 255, .3); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .26), 0 10px 30px rgba(2, 3, 26, .28); }
.lt-indice { background: linear-gradient(168deg, rgba(70, 64, 170, .4), rgba(14, 14, 50, .66) 34%, rgba(2, 3, 26, .9));
  border-left: 1px solid rgba(255, 255, 255, .18); box-shadow: inset 1px 0 0 rgba(255, 255, 255, .06), -30px 0 90px rgba(2, 3, 26, .4); }
.lt-previa span { background: linear-gradient(160deg, rgba(255, 255, 255, .14), rgba(255, 255, 255, .02)), rgba(14, 14, 52, .72); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .2); }

/* ---------- v15 · as duplas da página viram como no leitor: arrastar, setas, traços ---------- */
.flip.swipe > .sticky { -webkit-user-select: none; user-select: none; }
.flip.swipe .book-hit { cursor: grab; }
.flip.swipe .book-hit:active { cursor: grabbing; }
.book-linha { display: flex; align-items: center; gap: var(--space-2xs); }
.book-linha .book-prog { flex: 1; }
.book-seta { all: unset; box-sizing: border-box; flex: none; width: 2.6rem; height: 2.6rem; border-radius: 50%; display: grid; place-items: center; cursor: pointer;
  font: 300 1.5rem/1 var(--font); color: var(--ink); border: 1px solid color-mix(in srgb, var(--ink) 40%, transparent);
  background: linear-gradient(160deg, color-mix(in srgb, var(--ink) 14%, transparent), transparent 60%); transition: background-color .2s, color .2s, opacity .3s; }
.book-seta span { margin-top: -.1em; }
.book-seta:hover:not(:disabled) { background: var(--ink); color: var(--fundo); }
.book-seta:disabled { opacity: .25; cursor: default; }
.book-seta:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
@media (pointer: coarse) { .book-seta { display: none; } }
@media (min-width: 900px) and (orientation: landscape) {
  .book-nav { display: grid; gap: var(--space-3xs); }
  .book-dica { text-align: left; }
  .flip { --lw: min(calc((100vw - 2 * var(--margem)) * .86), calc((100svh - 18rem) * 1.5011), 1360px); }
}

/* ---------- v15 · leitor: o fundo vê-se (a cor do capítulo e da dupla); só as barras ficam mais escuras ---------- */
body::before { background:
    linear-gradient(rgba(2, 3, 26, .5), rgba(2, 3, 26, 0) 14%, rgba(2, 3, 26, 0) 84%, rgba(2, 3, 26, .55)),
    radial-gradient(120% 90% at 50% 48%, rgba(2, 3, 26, 0), rgba(2, 3, 26, .32)); }
/* v19 · dentro de um capítulo, o leitor ganha a cor do capítulo (o fundo, a régua e o ponto da página) */
#leitor { --cap: #ff85fe; }
.lt-range::-webkit-slider-thumb { box-shadow: 0 0 0 4px rgba(2, 3, 26, .5), 0 0 18px var(--cap); }
.lt-range::-moz-range-thumb { box-shadow: 0 0 0 4px rgba(2, 3, 26, .5), 0 0 18px var(--cap); }

/* ---------- v20 · setas das páginas (js/paginas.js): o scroll é livre; as setas levam de página em página ---------- */
.pag-setas { position: fixed; z-index: 11; --b: 2.6rem; right: max(4px, calc((var(--margem) - var(--b)) / 2)); top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .4rem; color: var(--ink); transition: color .5s, opacity .4s; } /* na margem da direita, a meia altura: não tapa o conteúdo */
.pag-setas button { all: unset; box-sizing: border-box; width: var(--b); height: var(--b); border-radius: 50%; display: grid; place-items: center; cursor: pointer;
  color: var(--ink); border: 1px solid color-mix(in srgb, var(--ink) 38%, transparent);
  background: linear-gradient(160deg, color-mix(in srgb, var(--ink) 16%, transparent), transparent 62%), color-mix(in srgb, var(--fundo) 30%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); transition: background-color .2s, color .2s, opacity .3s, border-color .2s; }
.pag-setas button svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.pag-setas button:hover:not(:disabled) { background: var(--ink); color: var(--fundo); border-color: var(--ink); }
:root.ink-dark .pag-setas button:hover:not(:disabled) { color: #fff; }
.pag-setas button:disabled { opacity: .25; cursor: default; }
.pag-setas button:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.pag-n { display: grid; justify-items: center; font: 700 10px/1.15 var(--font); letter-spacing: .04em; font-variant-numeric: tabular-nums; color: var(--ink-soft); white-space: nowrap; }
html:not(.pronto) .pag-setas, html.lt-aberto .pag-setas, html.vw-open .pag-setas { opacity: 0; visibility: hidden; }
@media (max-width: 700px) { .pag-setas { --b: 1.9rem; opacity: .85; } .pag-setas button svg { width: 1rem; height: 1rem; } }