/* =====================================================================
   Da geometria à observação: ray tracing em estrelas relativísticas — estilo do deck
   (mesmo desenho do seminário “Neutrinos em espaço-tempo curvo”)
   Palco fixo 1920×1080; tudo abaixo está em px desse palco.
   ===================================================================== */
:root {
  --display: "Instrument Serif", "Times New Roman", Georgia, serif;
  --read: "Literata", Georgia, serif;
  --ui: "Inter Tight", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bg: #171313;
  --surface: #241d1d;
  --surface-2: #302524;
  --line: rgba(255,255,255,.10);
  --line-2: rgba(255,255,255,.18);
  --text: #f7edf5;
  --text-2: #d2bbb5;
  --text-3: #a98e87;

  /* uma cor por fase da vida da estrela — violeta e turquesa vêm da página pessoal */
  --neb: #f0b4aa;                 /* I   · nascimento: o rosa do hidrogênio das nebulosas */
  --sol: #ed5415;                 /* II  · vida: o âmbar do Sol */
  --ana: #d69b84;                 /* III · estrelas degeneradas: o azul de uma anã branca */
  --psr: #f0b4aa;                 /* IV  · estrelas de nêutrons: turquesa */
  --bn: #ff8b4a;                  /* V   · buracos negros: violeta */
  --warn: #f6d0c3;
  --abertura: #c3c8d6;            /* abertura e fechamento: neutro, fora das cinco partes */
  /* as quatro partes deste seminário: I · a estrela por dentro usa --ana (azul), III · pulsares usa --psr (turquesa) */
  --rt: #ff8b4a;                  /* II · ray tracing relativístico: violeta */
  --res: #ed5415;                 /* IV · resultados: âmbar */
  --grad: linear-gradient(100deg, var(--ana) 0%, var(--rt) 34%, var(--psr) 66%, var(--res) 100%);

  --part: var(--abertura);        /* cor da parte atual; cada seção redefine */
  --W: 1920px;
  --H: 1080px;
}

* { box-sizing: border-box; }
html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; background: var(--bg); color: var(--text); }
body { font-family: var(--ui); -webkit-font-smoothing: antialiased; }
a { color: inherit; }

/* ---------- palco ---------- */
#stage {
  position: absolute; left: 50%; top: 50%;
  width: var(--W); height: var(--H);
  transform: translate(-50%, -50%) scale(var(--s, 1));
}
.slide {
  position: absolute; inset: 0; overflow: hidden; background: var(--bg);
  opacity: 0; visibility: hidden;
  transition: opacity .4s ease, visibility 0s linear .4s;
}
.slide.active { opacity: 1; visibility: visible; transition: opacity .4s ease; z-index: 2; }
.notes { display: none; }

.slide.p0 { --part: var(--abertura); }          /* abertura e fechamento */
.slide.p1 { --part: var(--ana); }               /* Parte I   · a estrela por dentro */
.slide.p2 { --part: var(--rt); }                /* Parte II  · ray tracing relativístico */
.slide.p3 { --part: var(--psr); }               /* Parte III · pulsares e estrelas de nêutrons */
.slide.p4 { --part: var(--res); }               /* Parte IV  · resultados */

/* ---------- slide de conteúdo ---------- */
.content {
  padding: 96px 130px 92px;
  display: grid; grid-template-rows: auto minmax(0, 1fr); gap: 44px;
  background:
    radial-gradient(ellipse 70% 60% at 100% 0%, color-mix(in srgb, var(--part) 9%, transparent), transparent 70%),
    var(--bg);
}
.content > header { position: relative; }
.eyebrow {
  margin: 0 0 16px; font-size: 19px; letter-spacing: .26em; text-transform: uppercase; color: var(--part);
  display: flex; align-items: center; gap: 16px;
}
.eyebrow::before { content: ""; width: 46px; height: 1px; background: currentColor; opacity: .7; }
h2 {
  font-family: var(--display); font-weight: 400; margin: 0;
  font-size: 84px; line-height: 1; letter-spacing: -.01em;
}
h2 em, h3 em { font-style: italic; color: var(--part); }
h3 { font-family: var(--display); font-weight: 400; font-size: 44px; line-height: 1.05; margin: 0 0 14px; }
.body { min-height: 0; position: relative; }

p, li { font-family: var(--read); font-weight: 300; font-size: 29px; line-height: 1.5; color: var(--text-2); }
p { margin: 0 0 22px; }
p b, li b { font-weight: 500; color: var(--text); }
p i, li i { color: var(--text); }
.big { font-size: 36px; line-height: 1.42; }
.small { font-size: 23px; line-height: 1.5; }
.muted { color: var(--text-3); }
.ui { font-family: var(--ui); }
.mono { font-family: var(--mono); font-size: .88em; }
.c-rt { color: var(--rt); } .c-res { color: var(--res); } .c-neb { color: var(--neb); } .c-sol { color: var(--sol); } .c-ana { color: var(--ana); } .c-psr { color: var(--psr); } .c-bn { color: var(--bn); } .c-warn { color: var(--warn); } .c-part { color: var(--part); }

ul.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
ul.list li { position: relative; padding-left: 38px; margin: 0; }
ul.list li::before {
  content: ""; position: absolute; left: 4px; top: .62em; width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--part); box-shadow: 0 0 12px color-mix(in srgb, var(--part) 60%, transparent);
}

/* grades */
.cols { display: grid; gap: 64px; height: 100%; align-items: start; }
.cols.c2 { grid-template-columns: 1fr 1fr; }
.cols.c3 { grid-template-columns: repeat(3, 1fr); gap: 36px; }
.cols.c4 { grid-template-columns: repeat(4, 1fr); gap: 30px; }
.cols.l { grid-template-columns: 1.25fr 1fr; }
.cols.r { grid-template-columns: 1fr 1.25fr; }
.cols.rr { grid-template-columns: .8fr 1.5fr; }
.cols.ll { grid-template-columns: 1.5fr .8fr; }
.cols.center { align-items: center; }
.stack { display: grid; gap: 22px; align-content: start; }

/* cartões */
.card {
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line); border-radius: 24px; padding: 32px 34px;
}
.card h4 {
  font: 600 17px var(--ui); letter-spacing: .2em; text-transform: uppercase; color: var(--part); margin: 0 0 14px;
}
.card p:last-child { margin-bottom: 0; }
.card.glow { border-color: color-mix(in srgb, var(--part) 40%, transparent); box-shadow: 0 0 60px color-mix(in srgb, var(--part) 12%, transparent); }

/* números grandes */
.stat { font-family: var(--display); font-size: 92px; line-height: .95; color: var(--text); }
.stat small { font-size: .42em; color: var(--text-3); }
.stat-label { font-size: 20px; color: var(--text-2); letter-spacing: .04em; margin-top: 10px; line-height: 1.4; }

/* equações */
.eq {
  font-family: var(--display); font-size: 50px; line-height: 1.25; color: var(--text);
  padding: 26px 36px; border-radius: 20px; border: 1px solid color-mix(in srgb, var(--part) 35%, transparent);
  background: color-mix(in srgb, var(--part) 7%, transparent); text-align: center;
}
.eq i { font-style: italic; }
.eq sub, .eq sup { font-size: .58em; }
.eq .note { display: block; font: 18px var(--ui); letter-spacing: .12em; text-transform: uppercase; color: var(--text-3); margin-top: 10px; }
.eq.sm { font-size: 40px; padding: 20px 28px; }
.frac { display: inline-flex; flex-direction: column; vertical-align: middle; text-align: center; font-size: .9em; line-height: 1.05; margin: 0 .1em; }
.frac > span:first-child { border-bottom: 2px solid currentColor; padding: 0 .12em .04em; }

/* citação */
blockquote {
  margin: 0; font-family: var(--display); font-style: italic; font-size: 52px; line-height: 1.18; color: var(--text);
  border-left: 3px solid var(--part); padding: 6px 0 6px 40px;
}
blockquote footer { font: 21px var(--ui); font-style: normal; color: var(--text-3); margin-top: 20px; letter-spacing: .04em; }

/* figuras */
figure { margin: 0; position: relative; }
figure img, figure svg.fig { display: block; width: 100%; border-radius: 18px; }
figure.fill { height: 100%; }
figure.fill img { height: 100%; object-fit: cover; }
figure.contain img { object-fit: contain; }
figure.white img { background: #fff; padding: 18px; }
figcaption { font: 19px/1.45 var(--ui); color: var(--text-3); margin-top: 14px; }
figcaption b { color: var(--text-2); font-weight: 600; }
.credit {
  position: absolute; right: 12px; bottom: 12px; font: 13px var(--ui); color: rgba(255,255,255,.75);
  background: rgba(0,0,0,.55); padding: 4px 9px; border-radius: 6px; letter-spacing: .02em;
}
figure > .credit { top: 12px; bottom: auto; }
.portrait img { aspect-ratio: 4 / 5; max-height: 560px; object-fit: cover; filter: grayscale(.15) contrast(1.05); }
.portrait figcaption { font-size: 21px; }
.portrait figcaption b { display: block; font: 400 34px var(--display); color: var(--text); margin-bottom: 2px; }

/* linha do tempo */
.timeline { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: 0; right: 0; top: 22px; height: 2px; background: linear-gradient(90deg, var(--rt), var(--psr), var(--res)); opacity: .6; }
.timeline > div { padding: 56px 22px 0 0; position: relative; }
.timeline > div::before { content: ""; position: absolute; left: 0; top: 14px; width: 18px; height: 18px; border-radius: 50%; background: var(--bg); border: 2px solid var(--part); }
.timeline .yr { font: 400 48px var(--display); color: var(--text); }
.timeline p { font-size: 22px; line-height: 1.45; margin: 6px 0 0; }

/* tabela */
table.tbl { width: 100%; border-collapse: collapse; font-family: var(--ui); font-size: 24px; }
table.tbl th { text-align: left; font-weight: 600; font-size: 16px; letter-spacing: .16em; text-transform: uppercase; color: var(--text-3); padding: 12px 16px; border-bottom: 1px solid var(--line-2); }
table.tbl td { padding: 15px 16px; border-bottom: 1px solid var(--line); color: var(--text-2); }
table.tbl td.n { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 22px; color: var(--text); }
table.tbl tr.hl td { color: var(--text); background: color-mix(in srgb, var(--part) 9%, transparent); }
table.tbl.tight { font-size: 20px; }
table.tbl.tight td { padding: 9px 14px; }
table.tbl.tight td.n { font: 500 21px var(--ui); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* tags */
.tag { display: inline-block; font: 600 15px var(--ui); letter-spacing: .14em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--text-2); }
.tag.part { border-color: color-mix(in srgb, var(--part) 55%, transparent); color: var(--part); }
/* símbolos dentro de rótulos em caixa alta: λ, μ, ψ e p não podem virar Λ, Μ, Ψ e P */
.nocase { text-transform: none; letter-spacing: .04em; }
.ref { font: 17px/1.5 var(--ui); color: var(--text-3); }
.cols.c4 .stack > p.ref { font-size: 15.5px; }
.ref i { color: var(--text-2); }
.stack > p.ref { margin: 0; }

/* rodapé de cada slide de conteúdo */
.slide .foot {
  position: absolute; left: 130px; right: 130px; bottom: 34px;
  display: flex; justify-content: space-between; align-items: center;
  font: 15px var(--ui); letter-spacing: .14em; text-transform: uppercase; color: var(--text-3);
}
.foot .parts { display: flex; gap: 10px; align-items: center; }
.foot .parts span { width: 36px; height: 3px; border-radius: 3px; background: rgba(255,255,255,.12); }
.slide.p1 .foot .parts span:nth-child(1),
.slide.p2 .foot .parts span:nth-child(2),
.slide.p3 .foot .parts span:nth-child(3),
.slide.p4 .foot .parts span:nth-child(4) { background: var(--part); box-shadow: 0 0 10px var(--part); }

/* Parte III: o primeiro slide de cada artigo ganha faixa e selo (deck.js); o rodapé diz “artigo n/N · k de m” */
.slide.paper-start { box-shadow: inset 12px 0 0 var(--part); }
.paper-badge { position: absolute; top: 34px; left: 130px; display: flex; align-items: center; gap: 16px; font: 600 15px var(--ui); letter-spacing: .14em; text-transform: uppercase; color: var(--text-2); }
.paper-badge b { background: var(--part); color: #0a0b12; padding: 6px 14px; border-radius: 999px; }
.paper-badge .dots { display: inline-flex; gap: 7px; }
.paper-badge .dots i { width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid color-mix(in srgb, var(--part) 70%, transparent); }
.paper-badge .dots i.done { background: color-mix(in srgb, var(--part) 45%, transparent); }
.paper-badge .dots i.cur { background: var(--part); border-color: var(--part); box-shadow: 0 0 10px var(--part); }
.paper-badge .ref { letter-spacing: .1em; color: var(--text); }
.foot .paper-tag { font-weight: 600; color: var(--part); }

/* uma equação termo a termo: cada termo sublinhado na sua cor, e o cartão que o explica (dash-res.js acende os dois) */
.terms-eq .t { border-bottom: 3px solid var(--c); padding: 0 4px 6px; border-radius: 6px; cursor: pointer; transition: background .3s, box-shadow .3s; }
.terms-eq .t.on { background: color-mix(in srgb, var(--c) 16%, transparent); box-shadow: 0 0 22px color-mix(in srgb, var(--c) 30%, transparent); }
.term-cards { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.term-cards .card { padding: 14px 16px; border-top: 3px solid var(--c); cursor: pointer; transition: background .3s, transform .3s; }
.term-cards .card.on { background: color-mix(in srgb, var(--c) 13%, var(--surface)); transform: translateY(-4px); }
.term-cards .card h4 { color: var(--c); font-size: 15px; letter-spacing: .12em; margin: 0 0 6px; }
.term-cards .card p { font-size: 18px; line-height: 1.4; margin: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 12px; }
.chips span { font: 15px var(--ui); color: var(--text-2); border: 1px solid var(--line-2); border-radius: 999px; padding: 4px 12px; }
.chips span b { font: 600 18px var(--read); color: var(--part); margin-right: 6px; }
/* duas equações com a explicação ao lado (o acoplamento com a matéria, no slide escalar-tensorial) */
.coupling { display: grid; grid-template-columns: auto 1fr; gap: 12px 18px; align-items: center; }
.coupling .eq .note { font-size: 13px; letter-spacing: .1em; margin-top: 6px; }
.coupling p { font-size: 19px; line-height: 1.45; margin: 0; }

/* ---------- capa de parte ---------- */
.partcover { display: grid; align-items: center; padding: 0 150px; }
.partcover .bg { position: absolute; inset: 0; background-size: cover; background-position: center; filter: saturate(.9); }
.partcover .bg canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.partcover .bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(23,19,19,.97) 0%, rgba(23,19,19,.9) 38%, rgba(23,19,19,.35) 70%, rgba(23,19,19,.2) 100%),
    linear-gradient(0deg, rgba(23,19,19,.85), transparent 40%);
}
.partcover .inner { position: relative; max-width: 1150px; }
.partcover .num {
  font-family: var(--display); font-style: italic; font-size: 300px; line-height: .8; margin: 0 0 10px;
  color: transparent; -webkit-text-stroke: 2px var(--part); opacity: .9;
}
.partcover .label { font-size: 21px; letter-spacing: .3em; text-transform: uppercase; color: var(--part); margin: 0 0 22px; }
.partcover h2 { font-size: 150px; line-height: .92; }
.partcover .sub { font-size: 34px; margin-top: 36px; max-width: 980px; }
.partcover .topics { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }
.partcover .topics span { font: 18px var(--ui); letter-spacing: .06em; color: var(--text-2); padding: 9px 18px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(23,19,19,.5); backdrop-filter: blur(6px); }
.partcover .credit { right: 24px; bottom: 20px; }

/* ---------- dashboards ---------- */
.dash {
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line); border-radius: 24px; padding: 26px 30px;
  display: grid; gap: 16px; height: 100%; grid-template-rows: auto minmax(0, 1fr) auto auto;
}
.dash-head { display: flex; justify-content: space-between; align-items: center; }
.dash-head .tag::before { content: "●"; color: var(--part); margin-right: 8px; animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .3; } }
.cv { position: relative; min-height: 0; min-width: 0; height: 100%; }
.cv canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.plots { display: grid; gap: 22px; min-height: 0; height: 100%; grid-template-rows: 100%; }
.plots.two { grid-template-columns: 1fr 1fr; }
.plots > div { position: relative; min-height: 0; height: 100%; }
.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px 34px; align-items: end; }
.ctl { display: grid; gap: 8px; }
.ctl label { font: 16px var(--ui); letter-spacing: .08em; color: var(--text-3); display: block; }
.ctl label output { float: right; }
.ctl label output { font-family: var(--mono); color: var(--text); letter-spacing: 0; font-size: 17px; }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 30px; background: transparent; cursor: pointer; }
input[type=range]::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--part), rgba(255,255,255,.15)); }
input[type=range]::-moz-range-track { height: 4px; border-radius: 4px; background: rgba(255,255,255,.15); }
input[type=range]::-moz-range-progress { height: 4px; border-radius: 4px; background: var(--part); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; margin-top: -9px; border-radius: 50%; background: var(--text); border: 3px solid var(--part); box-shadow: 0 0 14px var(--part); }
input[type=range]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--text); border: 3px solid var(--part); }
.seg { display: inline-flex; border: 1px solid var(--line-2); border-radius: 999px; overflow: hidden; }
.seg button { font: 600 16px var(--ui); letter-spacing: .06em; color: var(--text-2); background: transparent; border: 0; padding: 9px 18px; cursor: pointer; }
.seg button.on { background: var(--part); color: #0a0b12; }
.readout { display: flex; flex-wrap: wrap; gap: 12px 34px; font: 18px var(--ui); color: var(--text-3); }
.readout b { font: 500 20px var(--mono); color: var(--text); margin-left: 6px; }
.legend-line { display: flex; gap: 26px; font: 17px var(--ui); color: var(--text-2); flex-wrap: wrap; }
.legend-line span { display: inline-flex; align-items: center; gap: 9px; }
.legend-line span::before { content: ""; width: 28px; height: 3px; border-radius: 2px; background: var(--c); }
.legend-line span.dash-l::before { background: repeating-linear-gradient(90deg, var(--c) 0 7px, transparent 7px 12px); }

/* ---------- CAPA GERAL ---------- */
.cover canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.cover .veil {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(23,19,19,.96) 0%, rgba(23,19,19,.86) 34%, rgba(23,19,19,.25) 60%, rgba(23,19,19,0) 75%),
    radial-gradient(ellipse 120% 90% at 70% 50%, transparent 55%, rgba(23,19,19,.85) 100%);
}
.grain {
  position: absolute; inset: 0; pointer-events: none; opacity: .07; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.cover .top {
  position: absolute; left: 140px; right: 140px; top: 92px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 21px; letter-spacing: .22em; text-transform: uppercase; color: var(--text-2);
}
.school { display: flex; align-items: center; gap: 22px; }
.stages { display: inline-flex; gap: 7px; }
.stages i { width: 10px; height: 10px; border-radius: 50%; display: block; background: var(--c); box-shadow: 0 0 14px var(--c); }
.stages i:nth-child(1) { --c: var(--ana); } .stages i:nth-child(2) { --c: var(--rt); } .stages i:nth-child(3) { --c: var(--psr); } .stages i:nth-child(4) { --c: var(--res); }
.school b, .date b { color: var(--text); font-weight: 600; }
.date { font-variant-numeric: tabular-nums; }
.cover .main { position: absolute; left: 140px; top: 236px; width: 1500px; }
.kicker {
  font-size: 20px; letter-spacing: .3em; text-transform: uppercase; color: var(--psr);
  display: flex; align-items: center; gap: 18px; margin: 0 0 34px;
}
.kicker::before { content: ""; width: 64px; height: 1px; background: currentColor; opacity: .7; }
.cover h1 { font-family: var(--display); font-weight: 400; margin: 0; font-size: 168px; line-height: .92; letter-spacing: -.012em; }
.cover h1 em, .grad {
  font-style: italic; display: inline-block; padding-right: .08em;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-family: var(--read); font-weight: 300; font-size: 33px; line-height: 1.45; color: var(--text-2); max-width: 980px; margin: 42px 0 0; }
.lede i { color: var(--text); font-style: italic; }
.phase {
  display: inline-flex; align-items: baseline; gap: 26px; padding: 16px 28px 18px; border-radius: 999px;
  border: 1px solid rgba(255,184,107,.28);
  background: linear-gradient(90deg, rgba(255,143,171,.07), rgba(158,140,255,.06)); backdrop-filter: blur(6px);
}
.phase .eqn { font-family: var(--display); font-size: 40px; color: var(--text); }
.phase .eqn i { font-style: italic; }
.phase .eqn sub, .phase .eqn sup { font-size: .55em; }
.phase small { font-size: 17px; letter-spacing: .16em; text-transform: uppercase; color: var(--text-3); }
.cover .bottom { position: absolute; left: 140px; right: 140px; bottom: 96px; display: flex; justify-content: space-between; align-items: end; }
.author .name { font-family: var(--display); font-size: 56px; line-height: 1; margin: 0 0 14px; color: var(--text); }
.author .aff { font: 22px var(--ui); color: var(--text-2); letter-spacing: .02em; margin: 0; }
.author .aff span { color: var(--text-3); padding: 0 .5em; }
.right { display: flex; flex-direction: column; align-items: flex-end; gap: 26px; }
.links { font-size: 18px; letter-spacing: .06em; color: var(--text-3); }
.links span { padding: 0 .7em; }
.links a { color: var(--text-2); text-decoration: none; border-bottom: 1px solid rgba(255,184,107,.35); padding-bottom: 2px; }
.cover .legend { position: absolute; right: 140px; top: 188px; display: flex; gap: 30px; font-family: var(--display); font-size: 30px; color: var(--text-2); }
.cover .legend > span { display: inline-flex; align-items: center; gap: 10px; }
.cover .legend > span::before { content: ""; width: 26px; height: 2px; border-radius: 2px; background: var(--c); box-shadow: 0 0 10px var(--c); }
.cover .legend b { font-weight: 400; }
.cover .legend sub { font-size: .6em; font-style: italic; }

@media (prefers-reduced-motion: no-preference) {
  .slide.active .rise { animation: rise 1.1s cubic-bezier(.2,.7,.1,1) both; }
  .slide.active .rise.d1 { animation-delay: .10s; }
  .slide.active .rise.d2 { animation-delay: .22s; }
  .slide.active .rise.d3 { animation-delay: .38s; }
  .slide.active .rise.d4 { animation-delay: .52s; }
  .slide.active .rise.d5 { animation-delay: .70s; }
  @keyframes rise { from { opacity: 0; transform: translateY(26px); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }
}

/* ---------- cromo ---------- */
.progress { position: fixed; left: 0; right: 0; bottom: 0; height: 3px; z-index: 20; background: rgba(255,255,255,.06); }
.progress i { display: block; height: 100%; width: 0; background: var(--grad); transition: width .3s ease; }
.counter { position: fixed; right: 18px; bottom: 12px; z-index: 20; font: 12px var(--mono); color: var(--text-3); letter-spacing: .08em; opacity: 0; transition: opacity .3s; }
body:hover .counter { opacity: 1; }
#notes-panel {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; max-height: 34vh; overflow: auto;
  padding: 18px 28px 24px; background: rgba(12,14,22,.96); border-top: 1px solid var(--line);
  font: 17px/1.55 var(--read); color: var(--text-2); display: none;
}
body.show-notes #notes-panel { display: block; }
#notes-panel h4 { font: 600 12px var(--ui); letter-spacing: .2em; text-transform: uppercase; color: var(--sol); margin: 0 0 8px; }
#help { position: fixed; inset: 0; z-index: 50; display: none; place-items: center; background: rgba(4,5,9,.72); backdrop-filter: blur(4px); }
#help.open { display: grid; }
#help .box { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 28px 34px; min-width: 360px; }
#help h3 { font-size: 34px; }
#help dl { display: grid; grid-template-columns: auto 1fr; gap: 10px 22px; margin: 0; font-size: 15px; color: var(--text-2); }
#help dt { font-family: var(--mono); color: var(--text); }
#help dd { margin: 0; }

/* seletor de idioma, discreto como o contador */
.langsw { position: fixed; top: 14px; right: 18px; z-index: 30; display: flex; gap: 2px; font: 600 12px var(--ui); letter-spacing: .1em; opacity: 0; transition: opacity .3s; }
body:hover .langsw, .langsw:focus-within { opacity: .9; }
.langsw a { color: var(--text-3); text-decoration: none; padding: 5px 9px; border-radius: 6px; }
.langsw a:hover { color: var(--text); }
.fsbtn { position: fixed; top: 12px; right: 104px; z-index: 30; background: none; border: 0; color: var(--text-3); font: 18px var(--ui); padding: 3px 8px; border-radius: 6px; cursor: pointer; opacity: 0; transition: opacity .3s; }
body:hover .fsbtn, .fsbtn:focus-visible { opacity: .9; }
.fsbtn:hover { color: var(--text); background: rgba(255,255,255,.09); }
.langsw a.on { color: var(--text); background: rgba(255,255,255,.09); }

/* visão geral: grade de miniaturas */
body.overview { overflow: auto; }
body.overview #stage { position: static; transform: none; width: auto; height: auto; display: grid; grid-template-columns: repeat(auto-fill, 384px); gap: 18px; padding: 24px; justify-content: center; }
body.overview .slide { position: relative; opacity: 1; visibility: visible; width: 1920px; height: 1080px; transform: scale(.2); transform-origin: 0 0; margin: 0 -1536px -864px 0; cursor: pointer; border-radius: 30px; outline: 6px solid transparent; }
body.overview .slide.active { outline-color: var(--sol); }
body.overview .progress, body.overview .counter, body.overview .fsbtn { display: none; }

/* ---------- impressão: um slide por página ---------- */
@page { size: 1920px 1080px; margin: 0; }
@media print {
  html, body { overflow: visible; height: auto; }
  #stage { position: static; transform: none; }
  .slide { position: relative; width: var(--W); height: var(--H); opacity: 1; visibility: visible; break-after: page; }
  .progress, .counter, .langsw, .fsbtn, #notes-panel, #help { display: none !important; }
  .rise { animation: none !important; }
}

/* faixa de progresso só de leitura (slides de compacidade) */
.seg-static span { font: 600 16px var(--ui); letter-spacing: .06em; color: var(--text-3); padding: 9px 16px; }
.seg-static span.on { background: var(--part); color: #0a0b12; }

/* slide de vídeo em tela cheia */
.videoslide video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.videoslide .vveil { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(23,19,19,.92) 0%, rgba(23,19,19,.35) 30%, rgba(23,19,19,0) 55%), linear-gradient(180deg, rgba(23,19,19,.7) 0%, rgba(23,19,19,0) 22%); pointer-events: none; }
.videoslide .vhead { position: absolute; left: 130px; top: 84px; }
.videoslide .vfoot { position: absolute; left: 130px; right: 130px; bottom: 90px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 50px; align-items: end; }
.videoslide .vfoot p { font-size: 25px; margin: 0; color: var(--text); }
.videoslide .vsteps { display: flex; gap: 10px; flex-wrap: wrap; }
.videoslide .vsteps span { font: 16px var(--ui); color: var(--text-2); padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(23,19,19,.55); }

/* =====================================================================
   Peças próprias deste deck
   ===================================================================== */
.cols.c5 { grid-template-columns: repeat(5, 1fr); gap: 24px; }
.card .stat.roman { font-style: italic; color: var(--part); }

/* figuras de artigo (fundo branco) */
figure.paper img { background: #fff; padding: 14px; object-fit: contain; }
figure.paper figcaption { font-size: 18px; }

/* duas imagens lado a lado, com rótulo por cima */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; height: 100%; min-height: 0; }
.duo figure { min-height: 0; height: 100%; }
.duo figure img { height: 100%; object-fit: cover; }
.duo .lbl { position: absolute; left: 18px; bottom: 16px; font: 600 16px var(--ui); letter-spacing: .16em; text-transform: uppercase; color: var(--text); background: rgba(23,19,19,.6); padding: 7px 12px; border-radius: 8px; backdrop-filter: blur(4px); }

/* palavras grandes, uma de cada vez */
.words p { font-family: var(--display); font-size: 150px; line-height: 1.02; color: var(--text); margin: 0; }
.words .x { position: relative; color: var(--text-3); }
.words .x::after { content: ""; position: absolute; left: -3%; right: -3%; top: 54%; height: 9px; border-radius: 9px; background: var(--warn); box-shadow: 0 0 18px var(--warn); transform: scaleX(0); transform-origin: left; }
.slide.active .words .x::after { animation: strike .7s 1.5s cubic-bezier(.6,.1,.2,1) forwards; }
@keyframes strike { to { transform: scaleX(1); } }
@media (prefers-reduced-motion: reduce) { .words .x::after { transform: none; } }

/* afirmações grandes */
.say { font-family: var(--display); font-size: 64px; line-height: 1.14; color: var(--text); margin: 0 0 30px; }
.say em { font-style: italic; color: var(--part); }
.say.sm { font-size: 46px; }
.say .grad { font-style: italic; }

/* cadeia de etapas com setas */
.chain { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px; }
.chain span { font: 22px var(--ui); color: var(--text-2); padding: 10px 20px; border-radius: 999px; border: 1px solid var(--line-2); }
.chain span.on { color: #0a0b12; background: var(--part); border-color: var(--part); font-weight: 600; }
.chain i { font: 300 34px var(--display); color: var(--text-3); font-style: normal; }

/* ciclo de vida: a nuvem à esquerda e dois caminhos */
.life { display: grid; grid-template-columns: 250px 1fr; gap: 0 34px; height: 100%; align-items: center; }
.life-rows { display: grid; grid-template-rows: 1fr 1fr; gap: 26px; height: 100%; }
.life-row { display: grid; grid-template-columns: 150px repeat(4, 1fr); align-items: center; gap: 8px; position: relative;
  border: 1px solid var(--line); border-radius: 24px; padding: 10px 18px; background: linear-gradient(160deg, var(--surface-2), var(--surface)); }
.life-row > .tag { justify-self: start; }
.node { display: flex; flex-direction: column; align-items: center; text-align: center; position: relative; }
.node + .node::before { content: "→"; position: absolute; left: -22px; top: 70px; font: 300 40px var(--display); color: var(--text-3); }
.node .pic { width: 150px; height: 150px; border-radius: 50%; overflow: hidden; display: grid; place-items: center; }
.node .pic img { width: 100%; height: 100%; object-fit: cover; }
.node .pic.split { display: grid; grid-template-columns: 1fr 1fr; }
.orb { width: var(--d, 80px); height: var(--d, 80px); border-radius: 50%;
  background: radial-gradient(circle at 36% 34%, #fff 0%, var(--o) 32%, color-mix(in srgb, var(--o) 55%, #000) 100%);
  box-shadow: 0 0 calc(var(--d, 80px) * .5) color-mix(in srgb, var(--o) 70%, transparent); }
.node b { font: 400 28px/1.05 var(--display); color: var(--text); margin-top: 10px; }
.node small { font: 15px var(--ui); color: var(--text-3); letter-spacing: .04em; margin-top: 4px; }
.life-src .node .pic { width: 230px; height: 230px; }

/* retratos menores, em fila */
.portrait.sm img { max-height: 420px; }
.portrait.xs img { max-height: 300px; }
.portrait.xs figcaption b { font-size: 28px; }

/* diagramas em SVG escritos à mão */
svg.diag { display: block; width: 100%; height: auto; }
svg.diag text { font-family: var(--ui); fill: var(--text-2); }
svg.diag .serif { font-family: var(--display); font-style: italic; fill: var(--text); }

/* destaque de pedaços da métrica */
.hl-t { color: var(--bn); } .hl-r { color: var(--sol); } .hl-a { color: var(--psr); }
.eq .hl-t, .eq .hl-r, .eq .hl-a { text-shadow: 0 0 18px currentColor; }

/* figura que preenche uma coluna da grade sem empurrar a linha */
.cols > figure.fill { min-height: 0; }
/* figura que preenche a coluna e ainda tem legenda: a imagem cede o espaço da legenda */
figure.fill:has(> figcaption) img { height: calc(100% - 46px); }
body.nofx .slide, body.nofx .slide.active { transition: none !important; }
body.nofx .rise { animation: none !important; }

/* passos numerados (a receita) */
ol.steps { counter-reset: st; list-style: none; margin: 0; padding: 0; display: grid; gap: 20px; }
ol.steps li { counter-increment: st; position: relative; padding-left: 64px; font-family: var(--read); font-weight: 300; font-size: 26px; line-height: 1.45; color: var(--text-2); }
ol.steps li::before { content: counter(st); position: absolute; left: 0; top: -2px; width: 44px; height: 44px; border-radius: 50%; border: 2px solid var(--part); color: var(--part); font: 400 28px/40px var(--display); text-align: center; box-shadow: 0 0 14px color-mix(in srgb, var(--part) 40%, transparent); }
ol.steps li b { color: var(--text); font-weight: 500; }

/* SCARLET: charcoal, copper, orange and pale rose, inspired by the supplied Interstellar palette. */
:root { --ice:#f0b4aa; --dis:#ff8b4a; --gen:#d69b84; --res:#ed6b32; --abertura:#f7edf5;
 --grad:linear-gradient(100deg,#f0b4aa,#ff8b4a 65%,#ed5415); }
.slide.p1 {--part:var(--ice)} .slide.p2 {--part:var(--dis)}
.slide.p3 {--part:var(--gen)} .slide.p4 {--part:var(--res)}
.slide.p3 .foot .parts span:nth-child(3), .slide.p4 .foot .parts span:nth-child(4) {background:var(--part)}
.content {gap:38px} .content h2 {font-size:80px;max-width:1600px}
.content .body {height:100%;min-height:0} .content .body.center {display:grid;align-content:center}
.cover {background:radial-gradient(ellipse at 88% 40%,#684339 0,transparent 48%),linear-gradient(140deg,#171313,#231919)}
.cover .main {top:225px;width:1450px} .cover h1 {font-size:135px;line-height:.98}
.cover .paper-title {max-width:1330px;font:25px/1.5 var(--read);color:var(--text-2);margin-top:32px}
.cover .bottom {bottom:85px} .author .aff {font-size:23px}
.partcover {background:radial-gradient(ellipse at 85% 60%,color-mix(in srgb,var(--part) 15%,transparent),transparent 60%),var(--bg)}
.partcover .num {font-size:230px} .partcover h2 {font-size:142px} .partcover .sub {font-size:32px;max-width:1250px}
.partcover .inner {max-width:1450px} .partcover .bg::after {background:linear-gradient(90deg,#171313 0%,#171313e8 38%,#17131322 100%)}
.kicker {color:var(--ice)} .cover .top .stages i:nth-child(3) {--c:var(--gen)} .cover .top .stages i:nth-child(4) {--c:var(--res)}
.flat-rows {display:grid;gap:0;align-content:center} .flat-row {display:grid;grid-template-columns:110px 1fr;gap:30px;border-top:1px solid var(--line-2);padding:25px 0}
.flat-row .num {font:italic 64px var(--display);color:var(--part)} .flat-row h3 {font-size:43px;margin:0 0 8px}.flat-row p {font-size:25px;margin:0}
.headline {font:400 73px/1.15 var(--display);color:var(--text);max-width:1460px}.headline em {color:var(--part)}
.metric-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:60px;align-items:start}
.metric {border-top:1px solid var(--line-2);padding-top:30px}.metric .stat {font-size:118px;color:var(--part);margin-bottom:20px}.metric p {font-size:27px}
.evidence {height:100%;display:grid;grid-template-rows:minmax(0,1fr) auto;gap:20px}
.evidence .cv {min-height:350px}.evidence .ref {font-size:20px}
.dash {border-radius:16px;background:linear-gradient(150deg,#302524,#211b1a);padding:28px}
.dash .cv {min-height:240px}.dash-head {font:22px var(--ui);color:var(--text)}
.dash-head .tag {font-size:17px} .readout {font-size:22px} .readout b {font-size:23px}
.controls label {font-size:20px;color:var(--text-2)} .controls output {font-size:21px!important}
select {background:#302524;color:var(--text);font:22px var(--ui);padding:8px 12px;border:1px solid var(--line-2);border-radius:6px}
.tbl {font-size:28px!important}.tbl th {font-size:19px!important;letter-spacing:.06em!important}.tbl td {padding:18px!important}.tbl td.n {font-size:26px!important}
.tbl.compact td {padding:12px 18px!important}.tbl.compact {font-size:25px!important}
.eq {border:0;border-left:3px solid var(--part);border-radius:0;text-align:left;background:color-mix(in srgb,var(--part) 5%,transparent)}
.eq .note {text-transform:none;letter-spacing:.015em;font-size:23px;line-height:1.4;color:var(--text-2)}
.note-line {border-left:3px solid var(--part);padding-left:28px;margin-top:24px;font-size:27px}
.body > .ref {position:absolute;bottom:0}.small {font-size:25px}.ref {font-size:20px;line-height:1.45}
figure.fill {display:grid;grid-template-rows:minmax(0,1fr) auto;gap:12px} figure.fill img {min-height:0;border-radius:14px;object-fit:contain;background:#f7edf5}
figure.photo img {object-fit:cover;background:none}.figure-source {font:18px var(--ui);color:var(--text-3)}
.big {font-size:35px}.foot {letter-spacing:.08em!important}.overview .content {transition:none}
.slide .source {position:absolute;left:130px;bottom:65px;max-width:1550px;font:18px/1.3 var(--ui);color:var(--text-3)}
.warning {color:var(--warn)} .sources {display:grid;grid-template-columns:1fr 1fr;gap:26px 65px}.sources p {font:23px/1.5 var(--ui);margin:0}
.nofx *, .nofx *::before, .nofx *::after {animation:none!important;transition:none!important}
@media print { .slide {break-after:page} }

.body.cols > div:has(> .dash) {height:100%;min-height:0}
.metric-grid .stat {font-size:106px}
.readout {min-height:48px;line-height:1.4}