/* O Erro Está no Chão. Landing page. */

@font-face {
  font-family: "Anton";
  src: url("assets/fonts/Anton-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Source Serif";
  src: url("assets/fonts/SourceSerif4-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Serif";
  src: url("assets/fonts/SourceSerif4-Italic.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Source Serif";
  src: url("assets/fonts/SourceSerif4-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Mono";
  src: url("assets/fonts/DejaVuSansMono.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}

:root {
  --ink: oklch(13.5% 0.008 60);
  --ink-2: oklch(17% 0.01 60);
  --paper: oklch(93.5% 0.022 82);
  --paper-dim: oklch(80% 0.02 80);
  --red: oklch(63% 0.23 33);
  --red-deep: oklch(55% 0.21 33);
  --muted: oklch(68% 0.015 75);
  --line: oklch(32% 0.012 60);
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --max: 1280px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: "Source Serif", Georgia, serif;
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}
::selection { background: var(--red); color: var(--ink); }
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 4px; }

.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--paper); color: var(--ink); padding: .8rem 1rem;
}
.skip:focus { left: 1rem; top: 1rem; }

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  opacity: .045; mix-blend-mode: screen;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%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");
}
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(to right, oklch(100% 0 0 / .025) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(100% 0 0 / .025) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}

.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60;
  background: transparent;
}
.progress span {
  display: block; height: 100%; width: 100%; background: var(--red);
  transform: scaleX(0); transform-origin: 0 50%;
}

.site-head {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
  padding: 1.1rem var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s var(--ease), padding .35s var(--ease);
}
.site-head.is-stuck {
  background: oklch(13.5% 0.008 60 / .94);
  border-color: var(--line);
  padding-top: .8rem; padding-bottom: .8rem;
  backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: .7rem; text-decoration: none; }
.brand-logo {
  width: 2.55rem; height: 2.55rem; flex: 0 0 auto;
  border-radius: 50%; object-fit: cover;
  box-shadow: 0 0 0 1px oklch(82% 0.02 80 / .35);
}
.brand-name {
  font-family: "Mono", monospace; font-size: .68rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--paper-dim);
}
.nav { display: flex; gap: 1.8rem; }
.nav a {
  font-family: "Mono", monospace; font-size: .68rem; letter-spacing: .12em;
  text-transform: uppercase; text-decoration: none; color: var(--muted);
  transition: color .2s;
}
.nav a:hover { color: var(--paper); }
.head-cta {
  display: flex; align-items: center; gap: .8rem;
  font-family: "Mono", monospace; font-size: .76rem; letter-spacing: .04em;
  text-decoration: none; color: var(--ink);
  background: var(--paper); padding: .65rem .9rem;
  transition: background .2s, transform .2s;
}
.head-cta:hover { background: var(--red); transform: translateY(-1px); }
.head-arrow { font-size: 1rem; }

main { position: relative; z-index: 2; }

/* Hero */
.hero {
  max-width: var(--max); margin: 0 auto;
  min-height: 100svh;
  padding: 8.5rem var(--gutter) 3rem;
  display: grid; grid-template-columns: 1.08fr .92fr;
  gap: clamp(2rem, 5vw, 5rem); align-items: center;
}
.eyebrow, .kicker {
  font-family: "Mono", monospace; font-size: .68rem; letter-spacing: .2em;
  text-transform: uppercase; color: var(--red);
  margin: 0 0 1.4rem;
}
.hero h1 {
  font-family: "Anton", Impact, sans-serif; font-weight: 400;
  font-size: clamp(4rem, 9.4vw, 9.6rem);
  line-height: 1.05; letter-spacing: .005em;
  margin: 0 0 1.8rem; text-transform: uppercase;
}
.hero h1 span { display: block; }
.h1-last { position: relative; width: fit-content; color: var(--paper); }
.h1-last .underline {
  position: absolute; left: 0; bottom: -.12em;
  width: 100%; height: .11em;
  object-fit: fill; pointer-events: none;
}
.lede {
  font-size: clamp(1.25rem, 2.1vw, 1.7rem); line-height: 1.35;
  max-width: 26ch; margin: 0 0 1rem; color: var(--paper);
}
.desc { color: var(--muted); max-width: 44ch; margin: 0 0 2rem; font-size: 1rem; }
.buy-row { display: flex; align-items: center; gap: 2rem; flex-wrap: wrap; }
.price { display: flex; align-items: baseline; gap: .7rem; flex-wrap: wrap; }
.installments { flex: 0 0 100%; font-family: "Mono", monospace; font-size: .66rem; letter-spacing: .04em; color: var(--muted); margin-top: -.1rem; }
.price-now { font-family: "Mono", monospace; font-size: 1.55rem; letter-spacing: -.02em; }
.price-old { font-family: "Mono", monospace; font-size: .85rem; color: var(--muted); text-decoration: line-through; }
.btn {
  display: inline-flex; align-items: center; gap: .8rem;
  background: var(--red); color: var(--ink); text-decoration: none;
  font-family: "Mono", monospace; font-size: .76rem; letter-spacing: .08em;
  text-transform: uppercase; padding: 1rem 1.25rem;
  transition: transform .25s var(--ease), background .25s;
}
.btn:hover { transform: translateY(-2px); background: var(--paper); }
.btn span { font-size: 1.05rem; }
.meta {
  font-family: "Mono", monospace; font-size: .64rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--muted); margin: 1.4rem 0 0;
}

.hero-book { position: relative; display: flex; flex-direction: column; align-items: center; }
.vertical {
  position: absolute; left: -1.2rem; top: 8%;
  writing-mode: vertical-rl; transform: rotate(180deg);
  font-family: "Mono", monospace; font-size: .62rem; letter-spacing: .24em;
  text-transform: uppercase; color: var(--muted);
}
.book-wrap { position: relative; width: min(82%, 480px); }
.book-wrap img {
  width: 100%; height: auto;
  filter: drop-shadow(0 40px 60px oklch(0% 0 0 / .55));
  animation: float 7s ease-in-out infinite;
}
.book-caption {
  font-family: "Mono", monospace; font-size: .6rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--muted); margin-top: 2rem; text-align: center;
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(-.4deg); }
  50% { transform: translateY(-12px) rotate(.4deg); }
}

/* Marquee */
.marquee {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  overflow: hidden; padding: .9rem 0;
}
.marquee-track {
  display: flex; gap: 2.4rem; width: max-content;
  animation: marquee 46s linear infinite;
}
.marquee-track span {
  font-family: "Mono", monospace; font-size: .68rem; letter-spacing: .18em;
  text-transform: uppercase; color: var(--paper-dim); white-space: nowrap;
}
.marquee-track span::after { content: " ·"; color: var(--red); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Manifesto */
.manifesto {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(5rem, 9vw, 9rem) var(--gutter) clamp(4rem, 7vw, 7rem);
}
.manifesto h2 {
  font-family: "Anton", Impact, sans-serif; font-weight: 400;
  font-size: clamp(2.7rem, 5.6vw, 5.6rem); line-height: .98;
  text-transform: uppercase; max-width: 17ch; margin: 0 0 3rem;
}
.manifesto-body { display: grid; grid-template-columns: 1.2fr .8fr; gap: 4rem; align-items: end; }
.manifesto-body p { font-size: clamp(1.05rem, 1.5vw, 1.25rem); max-width: 58ch; color: var(--paper-dim); margin: 0; }
.stats { display: flex; gap: 2.5rem; margin: 0; }
.stats div { border-top: 1px solid var(--line); padding-top: .8rem; min-width: 5rem; }
.stats dt { font-family: "Anton", Impact, sans-serif; font-size: 3.2rem; line-height: 1; }
.stats dd {
  font-family: "Mono", monospace; font-size: .62rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted); margin: .4rem 0 0;
}

/* Section head */
.section-head { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter) 3rem; }
.section-head h2 {
  font-family: "Anton", Impact, sans-serif; font-weight: 400;
  font-size: clamp(2.2rem, 4.4vw, 4.2rem); line-height: 1;
  text-transform: uppercase; margin: 0 0 1rem; max-width: 20ch;
}
.section-sub { color: var(--muted); max-width: 52ch; margin: 0; font-size: 1rem; }

/* Chapters */
.chapters { padding: clamp(4rem, 8vw, 8rem) 0 clamp(5rem, 9vw, 9rem); background: var(--ink-2); }
.chapter-layout {
  max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter);
  display: grid; grid-template-columns: 1.45fr .55fr; gap: 4rem; align-items: start;
}
.chapter-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.chapter-list li {
  display: grid; grid-template-columns: 3.4rem 8.5rem 1fr;
  gap: 1rem; align-items: baseline;
  padding: 1.15rem 0; border-bottom: 1px solid var(--line);
  cursor: pointer; transition: color .2s, padding-left .3s var(--ease);
}
.chapter-list li:hover, .chapter-list li:focus-visible { color: var(--red); padding-left: .6rem; }
.chapter-list li:focus-visible { outline-offset: 2px; }
.num { font-family: "Mono", monospace; font-size: .7rem; color: var(--red); letter-spacing: .1em; }
.city { font-family: "Mono", monospace; font-size: .64rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.chapter-title { font-size: 1.15rem; line-height: 1.3; }
.chapter-preview { position: sticky; top: 6.5rem; }
.preview-frame { position: relative; aspect-ratio: 4 / 5; overflow: hidden; background: var(--ink); }
.preview-frame img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.55) contrast(1.05); transition: opacity .3s; }
.preview-frame img.is-changing { opacity: .15; }
.preview-tag {
  position: absolute; top: 0; left: 0; background: var(--red); color: var(--ink);
  font-family: "Mono", monospace; font-size: .7rem; padding: .45rem .6rem;
}
.chapter-preview p {
  font-family: "Mono", monospace; font-size: .62rem; letter-spacing: .08em;
  color: var(--muted); margin: .9rem 0 0; line-height: 1.6; text-transform: uppercase;
}

/* Gallery */
.gallery { padding: clamp(5rem, 9vw, 9rem) 0; }
.mosaic {
  max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter);
  display: grid; grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: clamp(170px, 22vw, 260px); gap: 1rem;
}
.mosaic figure { position: relative; margin: 0; overflow: hidden; background: var(--ink-2); }
.mosaic img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.62) contrast(1.04); transition: transform .8s var(--ease), filter .4s; }
.mosaic figure:hover img { transform: scale(1.04); filter: saturate(.9) contrast(1.02); }
.mosaic figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 3rem 1rem .8rem;
  font-family: "Mono", monospace; font-size: .6rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--paper);
  background: linear-gradient(transparent, oklch(8% 0 0 / .85));
}
.m1 { grid-column: span 7; }
.m2 { grid-column: span 5; }
.m3, .m4, .m5 { grid-column: span 4; }

/* For who */
.for-who {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(4rem, 7vw, 7rem) var(--gutter) clamp(5rem, 9vw, 9rem);
}
.for-who h2 {
  font-family: "Anton", Impact, sans-serif; font-weight: 400;
  font-size: clamp(2.2rem, 4.4vw, 4.2rem); text-transform: uppercase;
  margin: 0 0 2.5rem;
}
.who-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.who-list li { border-top: 1px solid var(--line); padding-top: 1rem; }
.who-list span { font-family: "Mono", monospace; font-size: .66rem; color: var(--red); letter-spacing: .1em; }
.who-list p { margin: .9rem 0 0; color: var(--paper-dim); font-size: 1.05rem; }

/* Offer */
.offer {
  background: var(--red); color: var(--ink);
  display: grid; grid-template-columns: .9fr 1.1fr;
  gap: clamp(2rem, 5vw, 5rem); align-items: center;
  padding: clamp(4rem, 8vw, 8rem) var(--gutter);
}
.offer-book { display: flex; justify-content: center; }
.offer-book img { width: min(70%, 360px); height: auto; filter: drop-shadow(0 30px 40px oklch(25% 0.1 30 / .35)); transform: rotate(-3deg); }
.offer .kicker { color: oklch(25% 0.1 30); }
.offer h2 {
  font-family: "Anton", Impact, sans-serif; font-weight: 400;
  font-size: clamp(2.6rem, 5vw, 5rem); line-height: .95;
  text-transform: uppercase; margin: 0 0 .7rem;
}
.offer-sub { font-size: 1.1rem; margin: 0 0 2rem; max-width: 32ch; }
.includes { list-style: none; margin: 0 0 2.2rem; padding: 0; }
.includes li {
  font-family: "Mono", monospace; font-size: .72rem; letter-spacing: .06em;
  text-transform: uppercase; padding: .8rem 0; border-top: 1px solid oklch(30% 0.1 30 / .35);
}
.includes li::before { content: "+"; margin-right: .8rem; font-weight: 700; }
.offer .price-old { color: oklch(30% 0.1 30 / .7); }
.offer .installments { color: oklch(30% 0.1 30); }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: var(--paper); color: var(--ink); }
.secure {
  font-family: "Mono", monospace; font-size: .6rem; letter-spacing: .08em;
  text-transform: uppercase; margin: 1.3rem 0 0; color: oklch(30% 0.1 30);
}

/* FAQ */
.faq { max-width: var(--max); margin: 0 auto; padding: clamp(5rem, 9vw, 9rem) var(--gutter); }
.faq-list { max-width: 880px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; position: relative;
  padding: 1.25rem 2.5rem 1.25rem 0;
  font-size: 1.1rem; color: var(--paper);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: .2rem; top: 1rem;
  font-family: "Mono", monospace; color: var(--red); font-size: 1.2rem;
  transition: transform .25s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 1.4rem; color: var(--muted); max-width: 62ch; }

/* Closing */
.closing {
  text-align: center; padding: clamp(5rem, 10vw, 10rem) var(--gutter);
  border-top: 1px solid var(--line);
}
.closing h2 {
  font-family: "Anton", Impact, sans-serif; font-weight: 400;
  font-size: clamp(3rem, 7vw, 7rem); line-height: .95;
  text-transform: uppercase; margin: 0 0 1rem;
}
.closing p { color: var(--muted); max-width: 48ch; margin: 0 auto 2rem; }

/* Footer */
.site-foot {
  display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem;
  padding: 2.5rem var(--gutter); border-top: 1px solid var(--line);
  font-family: "Mono", monospace; font-size: .6rem; letter-spacing: .08em;
  text-transform: uppercase; color: var(--muted);
}
.site-foot .brand-logo { margin-bottom: .6rem; }
.site-foot p { margin: 0; }
.foot-note { text-align: right; max-width: 38ch; line-height: 1.7; }

.mobile-cta { display: none; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; padding-top: 7.5rem; min-height: auto; }
  .hero-book { order: 2; margin-top: 2rem; }
  .vertical { display: none; }
  .book-wrap { width: min(70%, 380px); }
  .chapter-layout { grid-template-columns: 1fr; }
  .chapter-preview { display: none; }
  .manifesto-body { grid-template-columns: 1fr; gap: 2.5rem; }
  .mosaic { grid-auto-rows: 200px; }
}
@media (max-width: 820px) {
  .nav { display: none; }
  .head-cta { padding: .6rem .8rem; }
  .who-list { grid-template-columns: 1fr; gap: 1.5rem; }
  .offer { grid-template-columns: 1fr; }
  .offer-book img { width: min(55%, 280px); }
  .m1, .m2, .m3, .m4, .m5 { grid-column: span 12; }
  .mosaic { grid-auto-rows: 230px; }
  .site-foot { flex-direction: column; align-items: flex-start; }
  .foot-note { text-align: left; }
}
@media (max-width: 700px) {
  .offer-book { display: none; }
  .offer { padding: 3.2rem 1.25rem 4rem; gap: 1.2rem; }
  .offer-book img { width: min(58%, 220px); }
  .offer h2 { font-size: clamp(2.2rem, 9vw, 3rem); }
  .offer-sub { font-size: 1rem; }
  .mobile-cta {
    display: flex; justify-content: center; align-items: center;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 55;
    background: var(--red); color: var(--ink); text-decoration: none;
    font-family: "Mono", monospace; font-size: .72rem; letter-spacing: .08em;
    text-transform: uppercase; padding: 1rem;
  }
  body { padding-bottom: 3.4rem; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .brand-name { display: none; }
  .hero { padding-top: 6.5rem; }
  .hero h1 { font-size: clamp(3.4rem, 15vw, 5rem); }
  .buy-row { align-items: flex-start; gap: 1.4rem; }
  .btn { width: 100%; justify-content: center; }
  .chapter-list li { grid-template-columns: 2.6rem 1fr; gap: .3rem 1rem; }
  .chapter-list .city { grid-column: 2; }
  .chapter-list .chapter-title { grid-column: 2; }
  .stats { gap: 1.6rem; }
  .stats dt { font-size: 2.6rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}