/* =========================================================================
   SENESCÊNCIA — um ensaio que envelhece enquanto é lido
   Paleta biológica: fundo tecido escuro · tinta fresca (creme luminoso) que
   senesce em lipofuscina (ocre-âmbar) · verde-azulado = vitalidade / senólise.
   ========================================================================= */

:root{
  --bg:            #0b0c0d;
  --bg-warm:       #14110d;   /* centro do tecido, levemente quente */
  --bg-cool:       #0a0e0f;

  --ink-fresh:     #efe9db;   /* tinta jovem, creme luminoso */
  --ink-mid:       #b9a67e;   /* transição */
  --ink-aged:      #7a5f37;   /* lipofuscina — pigmento do envelhecer */

  --vital:         #57d6b6;   /* verde-azulado: vitalidade / senólise */
  --vital-deep:    #2fae8f;
  --senescent:     #d1913f;   /* âmbar/ocre da carga senescente */
  --senescent-hot: #d76b4a;   /* rubor inflamatório */

  --line:          rgba(239,233,219,.12);
  --line-soft:     rgba(239,233,219,.07);
  --glass:         rgba(18,16,13,.72);

  --measure:       62ch;
  --ease:          cubic-bezier(.22,.61,.36,1);

  --title-soft: 0;    /* eixo variável — controlado pelo título */

  /* textura de ruído (feTurbulence) gerada por código — máscara de erosão */
  --noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.86' numOctaves='2' seed='7' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)' opacity='0.5'/%3E%3C/svg%3E");
}

*{ box-sizing:border-box; }
html,body{ overflow-x:hidden; }
html{ -webkit-text-size-adjust:100%; }

body{
  margin:0;
  background:
    radial-gradient(120% 90% at 50% -10%, var(--bg-warm) 0%, var(--bg) 46%, var(--bg-cool) 100%);
  color:var(--ink-fresh);
  font-family:"Space Grotesk", system-ui, sans-serif;
  line-height:1.6;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

/* fundo de tecido gerado em canvas */
#field{
  position:fixed; inset:0; width:100%; height:100%;
  z-index:0; pointer-events:none; opacity:.9;
}

/* grão filmico do tecido — textura sutil sobre o fundo */
body::after{
  content:""; position:fixed; inset:0; z-index:3; pointer-events:none;
  background:var(--grain); background-size:220px 220px;
  opacity:.05; mix-blend-mode:overlay;
}
@media (prefers-reduced-motion:reduce){ body::after{ opacity:.03; } }

/* camada de pulsos de senólise */
#pulse-layer{
  position:fixed; inset:0; z-index:2; pointer-events:none; overflow:hidden;
}

/* aura imune — presença do "sistema imune" que segue o cursor/dedo */
.aura{
  position:fixed; left:0; top:0; z-index:2; pointer-events:none;
  width:216px; height:216px; margin:-108px 0 0 -108px; border-radius:50%;
  background:radial-gradient(circle, rgba(87,214,182,.16), rgba(87,214,182,.05) 42%, transparent 70%);
  opacity:0; transition:opacity .35s var(--ease), width .4s var(--ease), height .4s var(--ease);
  mix-blend-mode:screen; will-change:transform, opacity;
}
.aura.on{ opacity:1; }
.aura::after{
  content:""; position:absolute; inset:42%; border-radius:50%;
  background:rgba(87,214,182,.5); filter:blur(4px);
}
.pulse{
  position:fixed;
  left:0; top:0;
  width:10px; height:10px; margin:-5px 0 0 -5px;
  border-radius:50%;
  border:1.5px solid var(--vital);
  box-shadow:0 0 22px rgba(87,214,182,.55);
  animation:pulse .62s var(--ease) forwards;
  will-change:transform,opacity;
}
@keyframes pulse{
  from{ transform:scale(.3); opacity:.85; }
  to  { transform:scale(9);  opacity:0; }
}

.skip{
  position:absolute; left:12px; top:-60px; z-index:60;
  background:var(--vital); color:#04120e; padding:8px 14px; border-radius:8px;
  font-weight:600; text-decoration:none; transition:top .18s var(--ease);
}
.skip:focus{ top:12px; }

/* ---------------------------------------------------------------- topbar */
.topbar{
  position:relative; z-index:5;
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  padding:18px clamp(16px,4vw,44px);
  flex-wrap:nowrap;
}
.brand{ display:flex; align-items:center; gap:10px; min-width:0; }
.brand-mark{
  width:15px; height:15px; border-radius:50%; flex:none;
  background:radial-gradient(circle at 34% 32%, var(--vital), var(--vital-deep) 62%, transparent 72%);
  box-shadow:0 0 14px rgba(87,214,182,.6);
  animation:breathe 5.5s var(--ease) infinite;
}
@keyframes breathe{ 0%,100%{ transform:scale(1); opacity:.9;} 50%{ transform:scale(.82); opacity:.6;} }
.brand-txt{ font-size:13px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-fresh); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.brand-sub{ color:var(--ink-mid); }

.disclaimer-pill{
  display:flex; align-items:center; gap:8px; flex:none;
  font-size:11.5px; letter-spacing:.03em; color:#e7c9a0;
  background:rgba(215,107,74,.10);
  border:1px solid rgba(215,107,74,.34);
  padding:7px 13px; border-radius:999px; white-space:nowrap;
}
.disclaimer-pill .dot{ width:7px; height:7px; border-radius:50%; background:var(--senescent-hot); flex:none;
  box-shadow:0 0 9px var(--senescent-hot); animation:blink 2.4s steps(1) infinite; }
@keyframes blink{ 0%,70%{opacity:1;} 71%,100%{opacity:.25;} }

/* ---------------------------------------------------------------- main */
main{ position:relative; z-index:4; }

.hero{
  max-width:min(980px, 92vw);
  margin:clamp(30px,7vh,80px) auto clamp(40px,9vh,96px);
  padding:0 clamp(20px,5vw,28px);
  text-align:left;
}
.eyebrow{
  font-size:12px; letter-spacing:.32em; text-transform:uppercase;
  color:var(--vital); margin:0 0 20px; font-weight:500;
}
.title{
  font-family:"Fraunces", serif;
  font-weight:400;
  font-size:clamp(2.5rem, 12vw, 8rem);
  line-height:.92; margin:0 0 .32em; letter-spacing:-.02em;
  color:var(--ink-fresh);
  white-space:nowrap;
  font-variation-settings:"opsz" 144, "SOFT" 0, "WONK" 0;
}
.dek{
  font-family:"Fraunces", serif;
  font-optical-sizing:auto;
  font-size:clamp(1.16rem, 2.5vw, 1.55rem);
  line-height:1.55; font-weight:340; color:#ded6c4;
  max-width:54ch; margin:0 0 1.6em;
}
.dek em{ font-style:italic; color:var(--vital); }

.how{
  display:flex; flex-wrap:wrap; align-items:center; gap:10px 14px;
  font-size:12.5px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--ink-mid); margin:0; transition:opacity .6s var(--ease);
}
body.touched .how{ opacity:.32; }
.how span{ display:inline-flex; align-items:center; gap:7px; }
.how span::before{
  content:""; width:16px; height:16px; border-radius:5px; flex:none;
  border:1px solid var(--line); background:rgba(87,214,182,.06);
}
.how-mouse::before{ box-shadow:inset 0 0 0 3px rgba(87,214,182,.2); }
.how-scroll{ color:var(--vital); margin-left:auto; }
.how-scroll::before{ display:none; }
.how-tap{ display:none; }

/* ---------------------------------------------------------------- ensaio */
.ensaio{
  max-width:var(--measure);
  margin:0 auto; padding:0 clamp(20px,5vw,28px);
}
.passage{ margin:0 0 clamp(34px,6vh,62px); }
.passage h2{
  font-family:"Space Grotesk", sans-serif;
  font-size:12.5px; letter-spacing:.2em; text-transform:uppercase;
  font-weight:600; color:var(--vital-deep);
  margin:0 0 .85em; padding-bottom:.7em;
  border-bottom:1px solid var(--line-soft);
}
.passage p{
  font-family:"Fraunces", serif;
  font-optical-sizing:auto;
  font-size:clamp(1.28rem, 3.1vw, 1.72rem);
  line-height:1.62; font-weight:360; margin:0;
  color:var(--ink-fresh);
}
.term{ font-style:italic; color:var(--vital); font-weight:440; }

/* -------- a célula tipográfica: unidade que envelhece / se repara -------- */
.cell{
  --a:0;                       /* idade 0..1 */
  --solid:calc(1 - var(--a) * .92);   /* cobertura sólida da máscara → some com a idade */
  display:inline-block;        /* geometria estável: alvo de toque não escapa */
  /* trajeto de cor: creme fresco → lipofuscina ocre → escurecimento necrótico */
  color:color-mix(in oklab,
          color-mix(in oklab, var(--ink-fresh), var(--ink-aged) calc(min(1, var(--a) * 1.35) * 100%)),
          #2a1c0e calc(max(0, var(--a) - .6) / .4 * 55%));
  opacity:calc(1 - var(--a) * .58);
  filter:blur(calc(var(--a) * var(--a) * 1.1px));
  text-shadow:0 0 calc(var(--a) * 5px) rgba(122,95,55,calc(var(--a) * .5));
  /* erosão dos glifos (máscara por luminância): camada sólida clara que
     escurece com a idade (revela menos glifo) + ruído fixo que abre buracos.
     idade 0 → sólido branco → glifo inteiro; idade 1 → sólido escuro → só o
     que o ruído deixa passar sobrevive (glifo comido). */
  -webkit-mask-image:linear-gradient(hsl(0 0% calc(var(--solid) * 100%)), hsl(0 0% calc(var(--solid) * 100%))), var(--noise);
          mask-image:linear-gradient(hsl(0 0% calc(var(--solid) * 100%)), hsl(0 0% calc(var(--solid) * 100%))), var(--noise);
  -webkit-mask-size:100% 100%, 150px 150px;
          mask-size:100% 100%, 150px 150px;
  -webkit-mask-repeat:no-repeat, repeat;
          mask-repeat:no-repeat, repeat;
  -webkit-mask-composite:source-over;   /* união das camadas (WebKit/Blink) */
          mask-composite:add;           /* união (padrão) */
  mask-mode:luminance, luminance;
  transition:color .55s var(--ease), opacity .55s var(--ease),
             filter .55s var(--ease), text-shadow .55s var(--ease);
  will-change:opacity, filter;
}
/* espaço entre células (inline-block remove o espaço natural) */
.cell + .cell{ margin-left:.008em; }
.cw{ white-space:pre; }         /* preserva o espaço entre palavras */

/* célula reparada há pouco: leve brilho de vitalidade */
.cell.fresh{
  color:var(--ink-fresh);
  text-shadow:0 0 12px rgba(87,214,182,.42);
}

/* parágrafo/percurso com foco de teclado */
.ages{ outline:none; }
.ages:focus-visible{
  outline:2px solid var(--vital);
  outline-offset:6px; border-radius:6px;
}

/* título por caractere */
.title .cell{ opacity:calc(1 - var(--a) * .5); }

/* ---------------------------------------------------------------- closing */
.closing{
  max-width:var(--measure);
  margin:clamp(30px,7vh,70px) auto 0;
  padding:clamp(30px,6vh,54px) clamp(20px,5vw,28px) 60px;
  border-top:1px solid var(--line-soft);
}
.closing-line{
  font-family:"Fraunces", serif; font-style:italic;
  font-size:clamp(1.25rem,3vw,1.7rem); line-height:1.5;
  color:var(--vital); font-weight:360; margin:0 0 1.6em; max-width:44ch;
}
.fine{
  font-size:12.5px; line-height:1.65; color:var(--ink-mid);
  max-width:60ch; margin:0 0 1.4em;
}
.fine strong{ color:#e7c9a0; font-weight:600; }
.credit{ font-size:12px; letter-spacing:.05em; color:var(--ink-mid); margin:0; }
.credit a{ color:var(--vital); text-decoration:none; border-bottom:1px solid rgba(87,214,182,.35); }
.credit a:hover{ color:var(--ink-fresh); }

/* ---------------------------------------------------------------- panel */
.panel{
  position:fixed; z-index:20;
  right:clamp(14px,3vw,26px); bottom:clamp(14px,3vh,26px);
  width:min(320px, calc(100vw - 28px));
  background:var(--glass);
  backdrop-filter:blur(16px) saturate(1.1);
  -webkit-backdrop-filter:blur(16px) saturate(1.1);
  border:1px solid var(--line);
  border-radius:16px;
  box-shadow:0 18px 50px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.05);
  overflow:hidden;
}
.panel-toggle{
  display:none; width:100%; align-items:center; justify-content:space-between;
  background:none; border:none; color:var(--ink-fresh);
  font-family:inherit; font-size:12px; letter-spacing:.16em; text-transform:uppercase;
  padding:14px 16px; cursor:pointer;
}
.pt-chev{ transition:transform .3s var(--ease); }
.panel[data-collapsed="true"] .pt-chev{ transform:rotate(-180deg); }
.panel[data-collapsed="true"] .panel-body{ display:none; }

.panel-body{ padding:16px 16px 15px; display:flex; flex-direction:column; gap:15px; }

.panel-eyebrow{
  font-size:9.5px; letter-spacing:.24em; text-transform:uppercase;
  color:var(--vital-deep); margin:0 0 -4px; opacity:.85;
}

.legend{ display:flex; gap:14px; margin-top:9px; }
.lg{ display:inline-flex; align-items:center; gap:6px; font-size:10px; letter-spacing:.04em; color:var(--ink-mid); }
.lg::before{ content:""; width:10px; height:10px; border-radius:50%; flex:none; }
.lg-fresh::before{ background:var(--ink-fresh); box-shadow:0 0 7px rgba(87,214,182,.5); }
.lg-sen::before{ background:var(--ink-aged); box-shadow:0 0 7px rgba(209,145,63,.45); }

.age-read{
  font-family:"Fraunces", serif; font-style:italic; font-size:13px; line-height:1.5;
  color:var(--vital); margin:10px 0 0; padding:9px 12px;
  background:rgba(87,214,182,.07); border-left:2px solid var(--vital-deep); border-radius:0 8px 8px 0;
}

.load-head{ display:flex; align-items:baseline; justify-content:space-between; gap:8px; }
.load-name{ font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-mid); }
.load-val{ font-family:"JetBrains Mono", monospace; font-size:16px; font-weight:500; color:var(--vital); font-variant-numeric:tabular-nums; }
.load-track{
  height:8px; border-radius:999px; margin-top:8px;
  background:rgba(239,233,219,.08); overflow:hidden;
  border:1px solid var(--line-soft);
}
.load-fill{
  height:100%; width:0%;
  background:linear-gradient(90deg, var(--vital), var(--senescent) 62%, var(--senescent-hot));
  border-radius:999px; transition:width .3s linear;
}
.load-hint{ font-size:10.5px; color:var(--ink-mid); margin:7px 0 0; opacity:.75; }

.age-block{ border-top:1px solid var(--line-soft); padding-top:14px; }
.age-label{
  display:flex; align-items:baseline; gap:6px; flex-wrap:wrap;
  font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-mid);
}
.age-num{ font-family:"JetBrains Mono", monospace; font-size:22px; color:var(--ink-fresh); margin-left:auto; font-weight:500; }
.age-unit{ font-size:11px; color:var(--ink-mid); }

input[type=range]{
  -webkit-appearance:none; appearance:none; width:100%; height:26px;
  background:transparent; margin:8px 0 4px; cursor:pointer;
}
input[type=range]::-webkit-slider-runnable-track{
  height:4px; border-radius:999px;
  background:linear-gradient(90deg, var(--vital), var(--senescent));
}
input[type=range]::-moz-range-track{
  height:4px; border-radius:999px;
  background:linear-gradient(90deg, var(--vital), var(--senescent));
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none;
  width:18px; height:18px; border-radius:50%; margin-top:-7px;
  background:var(--ink-fresh); border:2px solid var(--vital);
  box-shadow:0 0 12px rgba(87,214,182,.5);
}
input[type=range]::-moz-range-thumb{
  width:18px; height:18px; border-radius:50%;
  background:var(--ink-fresh); border:2px solid var(--vital);
  box-shadow:0 0 12px rgba(87,214,182,.5);
}
input[type=range]:focus-visible{ outline:2px solid var(--vital); outline-offset:4px; border-radius:8px; }

.age-presets{ display:flex; gap:6px; margin-top:8px; flex-wrap:nowrap; }
.chip{
  flex:1; min-width:0;
  background:rgba(239,233,219,.05); border:1px solid var(--line);
  color:var(--ink-mid); font-family:"JetBrains Mono", monospace; font-size:12px;
  padding:6px 0; border-radius:8px; cursor:pointer; transition:.18s var(--ease);
}
.chip:hover{ color:var(--ink-fresh); border-color:var(--vital); }
.chip[aria-current="true"]{ background:rgba(87,214,182,.14); color:var(--vital); border-color:var(--vital); }
.age-desc{ font-size:10.5px; line-height:1.5; color:var(--ink-mid); margin:9px 0 0; opacity:.8; }

.reads{ border-top:1px solid var(--line-soft); padding-top:13px; display:flex; flex-direction:column; gap:9px; }
.read{ display:flex; align-items:center; justify-content:space-between; gap:10px; }
.read-lbl{ font-size:11px; color:var(--ink-mid); display:flex; align-items:baseline; gap:5px; flex-wrap:wrap; }
.read-lbl .sup{ font-size:8px; vertical-align:super; }
.read-lbl .il{ font-size:9px; letter-spacing:.04em; color:rgba(215,107,74,.8); text-transform:uppercase; }
.read-num{ font-family:"JetBrains Mono", monospace; font-size:14px; font-weight:500; color:var(--ink-fresh); font-variant-numeric:tabular-nums; white-space:nowrap; }
.reads-fict{ font-size:9.5px; letter-spacing:.08em; text-transform:uppercase; color:rgba(215,107,74,.7); margin:2px 0 0; }

.panel-actions{ display:flex; gap:8px; flex-wrap:nowrap; }
.btn{
  flex:1; min-width:0; font-family:inherit; font-size:12px; font-weight:500;
  letter-spacing:.02em; padding:10px 8px; border-radius:10px; cursor:pointer;
  border:1px solid var(--line); transition:.18s var(--ease); white-space:nowrap;
}
.btn-sweep{ background:var(--vital); color:#04140f; border-color:var(--vital); }
.btn-sweep:hover{ background:var(--ink-fresh); box-shadow:0 0 18px rgba(87,214,182,.45); }
.btn-sweep:disabled{ opacity:.4; cursor:default; box-shadow:none; }
.btn-ghost{ background:rgba(239,233,219,.04); color:var(--ink-mid); }
.btn-ghost:hover{ color:var(--ink-fresh); border-color:var(--ink-mid); }
.btn-ghost[aria-pressed="true"]{ background:rgba(87,214,182,.14); color:var(--vital); border-color:var(--vital); }
.btn:focus-visible{ outline:2px solid var(--vital); outline-offset:3px; }

/* onda de senólise (varredura) */
.sweep-front{
  position:fixed; left:0; right:0; height:180px; z-index:3; pointer-events:none;
  background:linear-gradient(180deg, transparent, rgba(87,214,182,.16) 45%, rgba(87,214,182,.28) 50%, rgba(87,214,182,.16) 55%, transparent);
  mix-blend-mode:screen;
}

.noscript-note{
  position:relative; z-index:5; max-width:var(--measure);
  margin:20px auto; padding:14px 20px; border:1px solid var(--line);
  border-radius:10px; color:var(--ink-mid); font-size:13px;
}

/* ---------------------------------------------------------------- mobile */
@media (max-width:720px){
  .how-mouse{ display:none; }
  .how-tap{ display:inline-flex; }
  .how-scroll{ margin-left:0; }

  .topbar{ flex-wrap:wrap; row-gap:10px; padding-top:14px; padding-bottom:12px; }
  .brand{ flex:1 1 auto; }
  .brand-sub{ display:none; }
  .disclaimer-pill{
    flex:0 1 auto; min-width:0; margin-left:auto;
    white-space:normal; text-align:right; line-height:1.25;
    font-size:9.5px; letter-spacing:0; padding:5px 10px;
  }

  .panel{
    left:50%; right:auto; transform:translateX(-50%);
    bottom:10px; width:calc(100vw - 20px);
    border-radius:14px;
  }
  .panel-toggle{ display:flex; }
  .panel[data-collapsed="true"]{ width:auto; left:auto; right:12px; transform:none; }
  .panel-body{ max-height:58vh; overflow-y:auto; }
  .panel-actions{ flex-direction:column; }
  .btn{ padding:11px 8px; }

  .hero{ margin-top:22px; }
}

@media (max-width:414px){
  .passage p{ font-size:1.24rem; }
  .dek{ font-size:1.12rem; }
}

/* ---------------------------------------------------------------- a11y */
@media (prefers-reduced-motion:reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; }
  .cell{ transition:color .2s, opacity .2s; filter:none !important; }
  .pulse, .sweep-front, .aura{ display:none !important; }
  .brand-mark{ animation:none; }
}