:root {
  --binding: #1d3527;
  --binding-deep: #142619;
  --gold: #c29a4b;
  --gold-light: #e2c98f;
  --gold-ink: #8a6726;
  --paper: #fbf8f2;
  --paper-shade: #f2ece0;
  --ink: #26231e;
  --ink-soft: #5b5449;
  --sage: #7e9278;
  --terra: #a9583a;
  --rule: #e2d8c4;

  --display: "Playfair Display", Georgia, "Times New Roman", serif;
  --text: "Alegreya Sans", "Segoe UI", Arial, sans-serif;

  --wrap: 1120px;
  --measure: 64ch;
  --gutter: clamp(20px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
html.motion { scroll-behavior: auto; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  font-size: clamp(18px, 0.6vw + 15px, 20px);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--binding); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.skip {
  position: absolute; left: -999px; top: 8px; z-index: 10;
  background: var(--binding); color: var(--paper); padding: 8px 14px;
}
.skip:focus { left: 8px; }

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.15;
  text-wrap: balance;
  color: var(--binding);
  margin: 0 0 0.55em;
}
h2 { font-size: clamp(30px, 2vw + 20px, 44px); }
h3 { font-size: clamp(21px, 0.6vw + 18px, 25px); }
p { margin: 0 0 1em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }
.column { max-width: calc(var(--measure) + 2 * var(--gutter)); margin: 0 auto; padding-inline: var(--gutter); }

/* buttons: sentence case, one shape everywhere */
.btn {
  display: inline-block;
  font-family: var(--text);
  font-weight: 700;
  font-size: 1.05em;
  text-decoration: none;
  padding: 16px 30px;
  border-radius: 3px;
  transition: background-color 0.15s ease;
}
.btn-gold { background: var(--gold); color: var(--binding-deep); }
.btn-gold:hover { background: var(--gold-light); }
.btn-green { background: var(--binding); color: var(--paper); }
.btn-green:hover { background: var(--binding-deep); }
.buy-note { font-size: 0.9em; margin: 12px 0 0; }

/* hero: a scroll-scrubbed scene of pages turning */
.hero { position: relative; background: var(--binding-deep); border-bottom: 4px solid var(--gold); }
.hero-stage {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #ede3cc;
}
.motion .hero { height: 230vh; }
.motion .hero-stage { position: sticky; top: 0; height: 100vh; height: 100svh; }
.hero-poster, .hero-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero-canvas { display: none; }
.motion .hero-canvas { display: block; }
.hero-shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(20, 38, 25, 0.94) 0%, rgba(20, 38, 25, 0.82) 38%, rgba(20, 38, 25, 0.25) 72%, rgba(20, 38, 25, 0.1) 100%),
    linear-gradient(0deg, rgba(20, 38, 25, 0.85) 0%, rgba(20, 38, 25, 0) 30%);
}
.hero-content { position: relative; width: 100%; padding-block: 96px 72px; }
.hero h1 {
  color: var(--gold-light);
  font-size: clamp(32px, 2.6vw + 18px, 56px);
  line-height: 1.12;
  max-width: 15em;
  margin-bottom: 0.5em;
}
.lede { font-size: 1.12em; max-width: 32em; color: #ede3cc; margin-bottom: 1.6em; }
.hero .buy-note { color: #d3c6a6; }
.byline { font-size: 0.95em; color: #bdb196; margin: 26px 0 0; max-width: 32em; }
.hero-after {
  position: absolute; left: 0; right: 0; top: 50%;
  transform: translateY(-50%);
  margin: 0; padding-inline: var(--gutter);
  text-align: center;
  font-family: var(--display); font-style: italic; font-weight: 500;
  font-size: clamp(34px, 3.4vw + 16px, 64px);
  line-height: 1.12;
  color: var(--gold-light);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
}

/* opening: the notebook slides out from behind the book */
.opening { background: var(--binding); color: #e6dcc4; padding-block: clamp(72px, 9vw, 128px); border-bottom: 4px solid var(--gold); }
.opening-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: clamp(36px, 6vw, 88px); align-items: center; }
.opening-books { position: relative; aspect-ratio: 1 / 0.95; max-width: 520px; width: 100%; justify-self: center; }
.ob {
  position: absolute; top: 4%; width: 56%;
  border-radius: 2px 5px 5px 2px;
  box-shadow: 0 30px 50px -18px rgba(0, 0, 0, 0.6);
}
.ob-livro { left: 6%; z-index: 2; transform: rotate(-4deg); }
.ob-caderno { right: 4%; transform: rotate(6deg); }
.opening h2 { color: var(--gold-light); }
.opening-text p { color: #d9ceb4; }

/* reading sections */
.reading, .letter, .author { padding-block: clamp(64px, 8vw, 112px); }
.reading h2, .letter h2 { font-size: clamp(27px, 1.4vw + 20px, 38px); }
.letter { background: var(--paper-shade); }
.salutation {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.35em;
  color: var(--gold-ink);
  margin-top: 1.4em;
  margin-bottom: 0.5em;
}
.sign-off {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.35em;
  color: var(--gold-ink);
  margin-top: 1.4em;
}

/* the idea */
.idea { padding-block: clamp(56px, 7vw, 96px); border-block: 1px solid var(--rule); }
.idea-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.idea-quote {
  font-family: var(--display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(36px, 3vw + 18px, 60px);
  line-height: 1.1;
  color: var(--binding);
  margin: 0;
  text-wrap: balance;
}
.idea-text { color: var(--ink-soft); }
.idea-text p:last-child { margin-bottom: 0; }

/* shared section intro */
.intro { max-width: var(--measure); margin-bottom: clamp(36px, 4vw, 56px); }
.intro p { color: var(--ink-soft); margin: 0; }

/* method */
.method { padding-block: clamp(72px, 9vw, 128px); }
.cycle-layout {
  display: grid;
  grid-template-columns: minmax(280px, 440px) minmax(0, 480px);
  gap: clamp(36px, 6vw, 88px);
  align-items: center;
}
.cycle { position: relative; width: 100%; aspect-ratio: 1; }
.cycle-ring { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.cycle-ring circle { fill: none; stroke: var(--gold); stroke-width: 0.6; stroke-dasharray: 1; stroke-dashoffset: 0; }
.cycle-center {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-family: var(--display); font-size: clamp(18px, 1vw + 12px, 23px);
  color: var(--binding); text-align: center; line-height: 1.2;
}
.node {
  --c: var(--binding);
  position: absolute;
  width: 27%; aspect-ratio: 1;
  border-radius: 50%;
  border: 2px solid var(--c);
  background: var(--paper);
  color: var(--c);
  font-family: var(--text);
  font-weight: 700;
  font-size: clamp(13px, 0.5vw + 10px, 16px);
  cursor: pointer;
  transform: translate(-50%, -50%) scale(0.86);
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}
.node:hover { background: var(--paper-shade); }
.node[aria-selected="true"] { transform: translate(-50%, -50%) scale(1); background: var(--c); color: #fff; }
.n-observar { left: 50%; top: 13%; --c: var(--binding); }
.n-interpretar { left: 87%; top: 50%; --c: var(--gold-ink); }
.n-aplicar { left: 50%; top: 87%; --c: var(--terra); }
.n-multiplicar { left: 13%; top: 50%; --c: #5f7559; }

.cycle-panel {
  border-left: 3px solid var(--panel-c, var(--binding));
  padding: 4px 0 4px clamp(20px, 3vw, 32px);
  min-height: 260px;
}
.panel-step { font-size: 0.9em; color: var(--ink-soft); margin-bottom: 0.4em; }
.cycle-panel h3 { color: var(--panel-c, var(--binding)); margin-bottom: 0.35em; }
.panel-question {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.25em;
  line-height: 1.35;
}
.panel-nav { display: flex; gap: 28px; margin-top: 22px; }
.text-btn {
  background: none; border: 0; padding: 4px 0; cursor: pointer;
  font-family: var(--text); font-weight: 700; font-size: 1em;
  color: var(--gold-ink);
  text-decoration: underline; text-underline-offset: 4px;
}
.cycle-foot {
  font-family: var(--display); font-style: italic;
  color: var(--ink-soft); margin: clamp(36px, 4vw, 56px) 0 0;
}

/* contents: set like a book's table of contents */
.contents { background: var(--paper-shade); padding-block: clamp(72px, 9vw, 128px); }
.toc {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(32px, 6vw, 88px);
  row-gap: clamp(36px, 4vw, 52px);
}
.toc-part { grid-column: 1; border-top: 2px solid var(--gold); padding-top: 18px; }
.toc-part-long { grid-column: 2; grid-row: 1 / span 3; }
.toc-part > p { color: var(--ink-soft); margin-bottom: 14px; }
.toc-list { list-style: none; margin: 0; padding: 0; }
.toc-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
}
.toc-list li span { order: 1; }
.toc-list li::after {
  content: "";
  order: 2;
  flex: 1;
  min-width: 16px;
  border-bottom: 2px dotted #cfc2a6;
  transform: translateY(-4px) scaleX(var(--lead, 1));
  transform-origin: left center;
}
.toc-list li b {
  order: 3;
  font-family: var(--display);
  font-weight: 600;
  color: var(--gold-ink);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* real pages */
.inside { padding-block: clamp(72px, 9vw, 128px); }
.pages { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); }
.pages figure { margin: 0; position: relative; }
.pages figure:nth-child(2) { z-index: 2; }
.pages img { border: 1px solid var(--rule); box-shadow: 0 18px 32px -22px rgba(29, 53, 39, 0.45); }
.pages figcaption { font-size: 0.95em; color: var(--ink-soft); margin-top: 16px; }
.pages figcaption strong { color: var(--ink); }

/* notebook */
.notebook { background: var(--paper-shade); padding-block: clamp(72px, 9vw, 120px); }
.notebook-text { max-width: var(--measure); }
.pull {
  font-family: var(--display);
  font-style: italic;
  font-size: 1.3em;
  line-height: 1.35;
  color: var(--binding);
}

/* fit */
.fit { padding-block: clamp(64px, 8vw, 112px); }
.fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 88px); }
.fit h2 { font-size: clamp(26px, 1vw + 20px, 34px); }
.check, .cross { list-style: none; margin: 0; padding: 0; }
.check li, .cross li { position: relative; padding: 0 0 14px 32px; }
.check li::before, .cross li::before { position: absolute; left: 0; top: 0; font-weight: 700; }
.check li::before { content: "✓"; color: var(--binding); }
.cross li::before { content: "×"; color: var(--terra); font-size: 1.3em; top: -0.15em; }

/* author */
.author { background: var(--paper-shade); }
.author-quote {
  margin: 1.6em 0 0;
  padding-left: 22px;
  border-left: 3px solid var(--gold);
  font-family: var(--display);
  font-style: italic;
  font-size: 1.25em;
  line-height: 1.4;
  color: var(--binding);
}

/* offer: the one raised element on the page */
.offer { padding-block: clamp(72px, 9vw, 128px); }
.offer-plate {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
  max-width: 980px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--gold);
  outline: 1px solid var(--gold);
  outline-offset: -8px;
  padding: clamp(32px, 5vw, 64px);
}
.offer-books { position: relative; aspect-ratio: 1 / 1.1; }
.offer-books img {
  position: absolute; width: 70%;
  border-radius: 2px 5px 5px 2px;
  box-shadow: 0 24px 40px -18px rgba(29, 53, 39, 0.5);
}
.offer-books img:first-child { right: 0; top: 0; transform: rotate(5deg); }
.offer-books img:last-child { left: 0; bottom: 0; transform: rotate(-3deg); }
.includes { list-style: none; margin: 0 0 24px; padding: 0; }
.includes li { position: relative; padding: 11px 0 11px 30px; border-bottom: 1px solid var(--rule); }
.includes li::before { content: "✓"; position: absolute; left: 0; color: var(--gold-ink); font-weight: 700; }
.includes cite { font-style: italic; }
.price { margin: 0 0 22px; color: var(--ink-soft); }
.price-value {
  display: block;
  font-family: var(--display);
  font-size: clamp(48px, 3vw + 32px, 66px);
  font-weight: 700;
  line-height: 1;
  color: var(--binding);
  margin-bottom: 6px;
}
.offer-notes { font-size: 0.92em; color: var(--ink-soft); margin: 16px 0 0; }

/* faq */
.faq { padding-block: clamp(64px, 8vw, 112px); border-top: 1px solid var(--rule); }
.faq h2 { margin-bottom: 0.8em; }
.faq details { border-bottom: 1px solid var(--rule); }
.faq details:first-of-type { border-top: 1px solid var(--rule); }
.faq summary {
  cursor: pointer; list-style: none; position: relative;
  padding: 18px 40px 18px 0;
  font-family: var(--display); font-size: 1.12em; color: var(--binding);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-size: 1.5em; color: var(--gold-ink);
}
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--ink-soft); }

/* back cover */
.back-cover {
  background: var(--binding);
  border-top: 4px solid var(--gold);
  color: #e9dfc8;
  padding-block: clamp(72px, 9vw, 120px);
}
.back-quote {
  font-family: var(--display);
  font-style: italic;
  font-size: clamp(28px, 1.6vw + 20px, 40px);
  line-height: 1.25;
  color: var(--gold-light);
  margin-bottom: 1.1em;
  text-wrap: balance;
}
.back-cover .buy-note { color: #cdbf9f; }

/* footer */
.footer { background: var(--binding-deep); color: #b3a88f; padding-block: 36px; font-size: 15px; }
.footer p { margin: 0 0 6px; }
.footer a { color: var(--gold-light); }
.footer .fine { font-size: 13px; margin-top: 14px; color: #8d846f; max-width: 72ch; }

/* signature with face */
.signature-row { display: flex; align-items: center; gap: 16px; margin-top: 1.6em; }
.signature-row .sign-off { margin: 0; }
.avatar { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; border: 2px solid var(--gold); }

/* what changes after 21 days */
.promise { padding-block: clamp(64px, 8vw, 112px); border-top: 1px solid var(--rule); }
.promise-list { list-style: none; margin: 0 0 32px; padding: 0; counter-reset: p; }
.promise-list li {
  position: relative;
  padding: 16px 0 16px 46px;
  border-bottom: 1px solid var(--rule);
}
.promise-list li::before {
  content: "";
  position: absolute; left: 4px; top: 22px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--binding) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4 8-9' fill='none' stroke='%23e2c98f' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 15px no-repeat;
}
.inline-cta .buy-note { color: var(--ink-soft); }

/* free day 1 */
.free-day {
  margin-top: clamp(40px, 5vw, 64px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px 40px; flex-wrap: wrap;
  padding: clamp(22px, 3vw, 32px) clamp(22px, 3vw, 36px);
  border: 1px dashed var(--gold);
  border-radius: 4px;
}
.free-day h3 { margin-bottom: 0.3em; }
.free-day p { margin: 0; color: var(--ink-soft); max-width: 46ch; }
.btn-outline { border: 2px solid var(--binding); color: var(--binding); background: transparent; padding: 14px 26px; }
.btn-outline:hover { background: var(--binding); color: var(--paper); }

/* author with arched photo */
.author-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(36px, 6vw, 88px); align-items: center; }
.author-photo { margin: 0; max-width: 400px; width: 100%; justify-self: center; }
.author-photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 20%;
  border-radius: 999px 999px 6px 6px;
  border: 3px solid var(--gold);
  background: var(--binding-deep);
}
.author-text { max-width: var(--measure); }

/* offer extras */
.deadline {
  margin: -8px 0 20px;
  padding: 10px 14px;
  background: var(--paper-shade);
  border-left: 3px solid var(--terra);
  color: var(--ink);
}
.guarantee {
  display: flex; gap: 18px; align-items: flex-start;
  margin-top: 26px; padding-top: 22px;
  border-top: 1px solid var(--rule);
}
.guarantee h3 { font-size: 1.15em; margin-bottom: 0.25em; }
.guarantee div p { font-size: 0.92em; color: var(--ink-soft); margin: 0; }
.guarantee-seal {
  flex: none;
  width: 72px; height: 72px; margin: 0;
  border-radius: 50%;
  border: 2px solid var(--gold);
  outline: 1px solid var(--gold); outline-offset: 3px;
  display: grid; place-content: center; text-align: center;
  font-family: var(--display); font-weight: 700; font-size: 28px; line-height: 0.9;
  color: var(--binding);
}
.guarantee-seal span { display: block; font-family: var(--text); font-weight: 700; font-size: 12px; color: var(--gold-ink); }

/* mobile buy bar */
.sticky-buy {
  position: fixed; left: 12px; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  z-index: 20;
  display: none;
  justify-content: space-between; align-items: center;
  padding: 14px 20px;
  border-radius: 4px;
  background: var(--gold); color: var(--binding-deep);
  font-weight: 700; text-decoration: none;
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.45);
  transform: translateY(160%);
  transition: transform 0.3s ease;
}
.sticky-buy span { font-family: var(--display); font-size: 1.15em; }
.sticky-buy.is-on { transform: translateY(0); }

/* responsive */
@media (max-width: 900px) {
  .idea-grid, .offer-plate, .fit-grid, .opening-grid, .author-grid { grid-template-columns: 1fr; }
  .author-photo { max-width: 300px; justify-self: start; }
  .opening-books { max-width: 380px; }
  .sticky-buy { display: flex; }
  .hero-shade { background: linear-gradient(0deg, rgba(20, 38, 25, 0.96) 0%, rgba(20, 38, 25, 0.86) 45%, rgba(20, 38, 25, 0.35) 100%); }
  .hero-stage { align-items: flex-end; }
  .hero-content { padding-block: 72px 40px; }
  .cycle-layout { grid-template-columns: 1fr; justify-items: center; }
  .cycle { max-width: 380px; }
  .cycle-panel { width: 100%; max-width: 560px; min-height: 0; }
  .toc { grid-template-columns: 1fr; }
  .toc-part, .toc-part-long { grid-column: 1; grid-row: auto; }
  .offer-books { width: 100%; max-width: 300px; margin: 0 auto; }
}
@media (max-width: 640px) {
  .pages { grid-template-columns: 1fr; max-width: 380px; }
  .btn { display: block; text-align: center; }
  .node { width: 30%; font-size: 12px; }
}