/* ==========================================================================
   MARCELO AIRES FERREIRA — A Máquina de Vencer
   Sistema visual: HUD tático (origem do Ciclo OODA) + editorial de livro,
   com a quadra de tênis como eixo de decisão sob pressão.
   ========================================================================== */

:root{
  /* --- paleta --- */
  --ink:        #0a0b0d;
  --ink-2:      #121419;
  --ink-3:      #1a1d24;
  --line-dark:  rgba(244,241,232,.14);
  --line-dark-strong: rgba(244,241,232,.28);

  --chalk:      #f5f2e8;
  --chalk-2:    #ece7d8;
  --ink-text:   #17181b;
  --ink-text-dim: #4c4d50;
  --line-light: rgba(23,24,27,.14);

  --cyan:       #2fe6ff;
  --cyan-soft:  rgba(47,230,255,.35);
  --cyan-dim:   rgba(47,230,255,.12);
  --red:        #ff4433;
  --clay:       #a44420;

  /* --- tipografia --- */
  --f-display: 'Fraunces', ui-serif, Georgia, serif;
  --f-body:    'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --f-mono:    'Space Mono', ui-monospace, 'SFMono-Regular', monospace;

  --fs-hero:  clamp(2.5rem, 4.6vw + 1rem, 5.4rem);
  --fs-h2:    clamp(2rem, 2.6vw + 1.1rem, 3.4rem);
  --fs-h3:    clamp(1.2rem, .6vw + 1rem, 1.5rem);
  --fs-lead:  clamp(1.05rem, .4vw + .9rem, 1.3rem);
  --fs-body:  clamp(1rem, .15vw + .92rem, 1.08rem);

  /* --- espaçamento / layout --- */
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --max-w: 1240px;
  --section-pad: clamp(4.5rem, 9vw, 8.5rem);
  --radius: 2px;

  --ease: cubic-bezier(.22,.68,.35,1);
  color-scheme: dark;
}

/* ==========================================================================
   RESET
   ========================================================================== */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body{
  margin: 0;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--chalk);
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul, ol{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4,p{ margin: 0; }
button{ font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input{ font: inherit; }
svg{ display: block; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

.wrap{
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link{
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 999;
  background: var(--cyan);
  color: var(--ink);
  padding: .75rem 1.25rem;
  font-family: var(--f-mono);
  font-weight: 700;
  border-radius: var(--radius);
}
.skip-link:focus{ top: 1rem; }

:focus-visible{ outline: 2px solid var(--cyan); outline-offset: 3px; }

/* ==========================================================================
   PRIMITIVES
   ========================================================================== */
.eyebrow{
  font-family: var(--f-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  gap: .5em;
}
.eyebrow--light{ color: var(--cyan); }
.eyebrow__tick{ font-size: .7em; }

.section{ padding-block: var(--section-pad); }
.section--dark{ background: var(--ink-2); color: var(--chalk); }
.section--paper{ background: var(--chalk); color: var(--ink-text); }
.section--paper-2{ background: var(--chalk-2); color: var(--ink-text); }
.section--paper .eyebrow, .section--paper-2 .eyebrow{ color: var(--clay); }

.section-head{ max-width: 760px; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); }
.section-head h2{
  font-family: var(--f-display);
  font-size: var(--fs-h2);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -.01em;
  margin-bottom: 1.25rem;
}
.section-head__lead{
  font-size: var(--fs-lead);
  line-height: 1.6;
  max-width: 62ch;
  opacity: .88;
}
.section--dark .section-head__lead{ color: var(--chalk-2); opacity: 1; }
.section--paper .section-head__lead,
.section--paper-2 .section-head__lead{ color: var(--ink-text-dim); }

/* --- buttons --- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  font-family: var(--f-mono);
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: transform .25s var(--ease), background-color .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
  white-space: nowrap;
}
.btn--lg{ padding: 1.05rem 2rem; font-size: .85rem; }
.btn--sm{ padding: .6rem 1.15rem; font-size: .72rem; }
.btn--accent{
  background: var(--cyan);
  color: var(--ink);
  box-shadow: 0 0 0 0 rgba(47,230,255,.5);
}
.btn--accent:hover{
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -8px rgba(47,230,255,.55);
}
.btn--ghost{
  background: transparent;
  color: currentColor;
  border-color: var(--line-dark-strong);
}
.btn--ghost:hover{ border-color: var(--cyan); color: var(--cyan); }
.btn__label-short{ display: none; }

/* --- reveal on scroll --- */
.reveal{
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-visible{ opacity: 1; transform: none; }

/* shared icon strokes used inside inline SVGs */
.ic-ring{ fill: none; stroke: var(--cyan); stroke-width: 2; }
.ic-dot{ fill: var(--red); }
.ic-tick{ stroke: var(--cyan); stroke-width: 2; stroke-linecap: round; }
.ic-sweep{ stroke: var(--cyan); stroke-width: 2; stroke-linecap: round; transform-origin: 32px 32px; animation: sweep 4s linear infinite; }
.ic-needle{ stroke: var(--cyan); stroke-width: 2; stroke-linecap: round; }
.ic-vec{ stroke: var(--line-dark-strong); stroke-width: 1.5; stroke-linecap: round; }
.ic-arc{ fill: none; stroke: var(--cyan); stroke-width: 2; stroke-linecap: round; }
.ic-check{ fill: none; stroke: var(--cyan); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }

@keyframes sweep{ to{ transform: rotate(360deg); } }

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header{
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  padding-block: 1.1rem;
  transition: padding .35s var(--ease);
}
/* O blur/fundo do header "vidro" fica num pseudo-elemento, não no próprio
   .site-header — se ficasse no elemento em si, backdrop-filter faria o
   header virar a referência de posicionamento dos filhos position:fixed
   (o menu mobile, #mainNav), quebrando ele em telas pequenas assim que o
   header ficasse no estado "rolado" (ou sempre, no --force-solid). */
.site-header::before{
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .35s var(--ease), border-color .35s var(--ease);
}
.site-header.is-scrolled::before,
.site-header--force-solid::before{
  background: rgba(10,11,13,.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-color: var(--line-dark);
}
.site-header.is-scrolled,
.site-header--force-solid{
  padding-block: .7rem;
}
.site-header__inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand{ display: flex; align-items: center; gap: .6rem; color: var(--chalk); }
.brand__mark{ width: 28px; height: 28px; color: var(--cyan); flex-shrink: 0; }
.brand__dot{ animation: pulse-dot 2.6s ease-in-out infinite; }
@keyframes pulse-dot{ 0%,100%{ opacity: 1; } 50%{ opacity: .35; } }
.brand__text{
  font-family: var(--f-mono);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.main-nav{ display: flex; gap: clamp(1.25rem, 2vw, 2.25rem); }
.main-nav a{
  font-family: var(--f-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--chalk-2);
  position: relative;
  padding-block: .25rem;
}
.main-nav a::after{
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--cyan);
  transition: right .3s var(--ease);
}
.main-nav a:hover{ color: var(--chalk); }
.main-nav a:hover::after{ right: 0; }

/* Só aparece dentro do menu mobile em tela cheia — no nav horizontal do
   desktop o ícone de rede social vive em .header-icon-link */
.main-nav__social{ display: none; }
.main-nav__lang{ display: none; }

.site-header__actions{ position: relative; z-index: 95; display: flex; align-items: center; gap: 1rem; }

.header-lang-switch{
  display: flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--f-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  flex-shrink: 0;
}
.header-lang-switch a{ color: var(--chalk-2); transition: color .25s var(--ease); }
.header-lang-switch a:hover{ color: var(--chalk); }
.header-lang-switch a[aria-current="true"]{ color: var(--cyan); font-weight: 700; pointer-events: none; }
.header-lang-switch span{ color: var(--line-dark-strong); }

.header-icon-link{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--chalk-2);
  border: 1px solid var(--line-dark);
  transition: color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
  flex-shrink: 0;
}
.header-icon-link svg{ width: 17px; height: 17px; }
.header-icon-link:hover{ color: var(--cyan); border-color: var(--cyan); transform: translateY(-1px); }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
}
.nav-toggle span{
  display: block;
  width: 100%;
  height: 2px;
  background: var(--chalk);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--ink);
  padding-top: 6rem;
}
.hero__bg{ position: absolute; inset: 0; z-index: 0; }
.hero__radar{
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: .55;
}
.hero__radar-ring{
  fill: none;
  stroke: var(--cyan);
  stroke-width: .15;
  opacity: .4;
}
.hero__radar-sweep{
  stroke: var(--cyan);
  stroke-width: .2;
  transform-origin: 50px 18px;
  animation: sweep-hero 10s linear infinite;
  opacity: .5;
}
@keyframes sweep-hero{ to{ transform: rotate(360deg); } }

.hero__video{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s var(--ease);
}
.hero__video.is-ready{ opacity: .5; }
.hero__scrim{
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10,11,13,.55) 0%, rgba(10,11,13,.45) 40%, rgba(10,11,13,.85) 100%),
    radial-gradient(120% 90% at 50% 15%, transparent 0%, rgba(10,11,13,.5) 100%);
}

.hero__content{ position: relative; z-index: 1; padding-block: 2rem 4rem; }
.hero__headline{
  font-family: var(--f-display);
  font-weight: 500;
  font-size: var(--fs-hero);
  line-height: 1.06;
  letter-spacing: -.01em;
  max-width: 16ch;
  color: var(--chalk);
}
.hero__headline em{
  font-style: italic;
  color: var(--cyan);
}
.hero__sub{
  margin-top: 1.75rem;
  max-width: 56ch;
  font-size: var(--fs-lead);
  color: var(--chalk-2);
  line-height: 1.65;
}
.hero__actions{
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__ticker{
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line-dark);
  background: rgba(10,11,13,.55);
  overflow: hidden;
  padding-block: .85rem;
}
.hero__ticker-track{
  display: flex;
  width: max-content;
  font-family: var(--f-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--cyan);
  animation: ticker 26s linear infinite;
}
/* Cada grupo garante, sozinho, cobertura de 100% da largura da tela —
   assim a faixa nunca fica com metade vazia em monitores largos. */
.hero__ticker-group{
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-around;
  gap: 1.5rem;
  min-width: 100vw;
}
.hero__ticker-sep{ color: var(--line-dark-strong); }
@keyframes ticker{ from{ transform: translateX(0); } to{ transform: translateX(-50%); } }

/* ==========================================================================
   MÉTODO / OODA
   ========================================================================== */
.ooda{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.ooda__step{
  background: var(--ink-2);
  padding: clamp(1.75rem, 2.5vw, 2.5rem) clamp(1.25rem, 2vw, 1.75rem);
  position: relative;
}
.ooda__index{
  font-family: var(--f-mono);
  font-size: .75rem;
  color: var(--line-dark-strong);
  margin-bottom: 1.5rem;
}
.ooda__icon{ width: 52px; height: 52px; margin-bottom: 1.5rem; }
.ooda__icon svg{ width: 100%; height: 100%; }
.ooda__step h3{
  font-family: var(--f-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  margin-bottom: .65rem;
  color: var(--chalk);
}
.ooda__step p{ color: var(--chalk-2); font-size: .95rem; line-height: 1.6; }

/* ==========================================================================
   EBOOK / FORM
   ========================================================================== */
.ebook__grid{
  display: grid;
  grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
.ebook__visual{ display: flex; justify-content: center; }
.ebook__cover-frame{
  position: relative;
  max-width: 340px;
  width: 100%;
  transform: rotate(-2.5deg);
  transition: transform .5s var(--ease);
}
.ebook__cover-frame:hover{ transform: rotate(0deg); }
.ebook__cover{
  width: 100%;
  height: auto;
  aspect-ratio: 560 / 792;
  object-fit: cover;
  border-radius: 3px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.5), 0 0 0 1px rgba(0,0,0,.06);
}
.ebook__cover-tag{
  position: absolute;
  top: -14px;
  right: -14px;
  background: var(--red);
  color: var(--chalk);
  font-family: var(--f-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  padding: .5rem .8rem;
  border-radius: 2px;
  box-shadow: 0 8px 20px -6px rgba(255,68,51,.6);
}

.ebook__subtitle{
  font-family: var(--f-display);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--clay);
  margin-bottom: 1.1rem;
}
.ebook__copy h2{
  font-family: var(--f-display);
  font-weight: 500;
  font-size: var(--fs-h2);
  line-height: 1.05;
  margin-bottom: .5rem;
}

.ebook__points{ margin: 2rem 0 2.5rem; display: grid; gap: .9rem; }
.ebook__points li{
  display: flex;
  gap: .9rem;
  align-items: baseline;
  font-size: .98rem;
  color: var(--ink-text-dim);
}
.ebook__points-tag{
  font-family: var(--f-mono);
  font-size: .72rem;
  color: var(--clay);
  border: 1px solid var(--line-light);
  padding: .15rem .4rem;
  border-radius: 2px;
  flex-shrink: 0;
}

.lead-form{
  background: var(--ink);
  color: var(--chalk);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border-radius: 4px;
  border: 1px solid var(--line-dark);
}
.lead-form__row{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.1rem;
}
.field{ display: flex; flex-direction: column; gap: .4rem; }
.field label{
  font-family: var(--f-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--chalk-2);
}
.field input{
  background: var(--ink-2);
  border: 1px solid var(--line-dark);
  color: var(--chalk);
  padding: .85rem 1rem;
  border-radius: 2px;
  transition: border-color .25s var(--ease);
}
.field input::placeholder{ color: rgba(245,242,232,.35); }
.field input:focus{ border-color: var(--cyan); outline: none; }
.field input:invalid:not(:placeholder-shown){ border-color: var(--red); }

.lead-form__submit{ width: 100%; }
.lead-form__consent{
  margin-top: 1rem;
  font-size: .78rem;
  color: rgba(245,242,232,.55);
  line-height: 1.5;
}
.lead-form__consent a{ color: var(--cyan); text-decoration: underline; text-underline-offset: 2px; }

.lead-success{
  background: var(--ink);
  color: var(--chalk);
  padding: clamp(2rem, 4vw, 2.75rem);
  border-radius: 4px;
  border: 1px solid var(--cyan-soft);
  text-align: center;
}
.lead-success__icon{ width: 48px; height: 48px; margin: 0 auto 1.25rem; }
.lead-success h3{
  font-family: var(--f-display);
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: .6rem;
}
.lead-success p{ color: var(--chalk-2); margin-bottom: 1.5rem; }

/* ==========================================================================
   CHAPTERS — apresentado como um plano de voo: waypoints (mira) conectados
   por uma linha, ecoando a marca e os ícones do Ciclo OODA.
   ========================================================================== */
.section-head--split{
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.chapters__count{
  font-family: var(--f-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--clay);
  border: 1px solid var(--line-light);
  padding: .5rem .9rem;
  border-radius: 2px;
  white-space: nowrap;
}

.chapter-list{ position: relative; }
.chapter-list::before{
  content: "";
  position: absolute;
  left: 27px;
  top: 28px;
  bottom: 28px;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--line-dark-strong) 0 4px, transparent 4px 10px);
  opacity: .55;
}
.section--paper-2 .chapter-list::before{ background: repeating-linear-gradient(to bottom, rgba(23,24,27,.28) 0 4px, transparent 4px 10px); }

.chapter-list__item{
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 1.5rem;
  align-items: flex-start;
  padding-block: 1.65rem;
  border-bottom: 1px solid var(--line-light);
  transition: padding-left .35s var(--ease);
}
.chapter-list__item:first-child{ padding-top: .1rem; }
.chapter-list__item:hover{ padding-left: .6rem; }

.chapter-list__marker{
  position: relative;
  z-index: 1;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--chalk-2);
  display: grid;
  place-items: center;
}
.chapter-list__marker svg{ position: absolute; inset: 0; width: 100%; height: 100%; }
.chapter-list__marker .ic-ring{ stroke-width: 1.5; opacity: .55; transition: opacity .3s var(--ease); }
.chapter-list__marker-num{
  position: relative;
  font-family: var(--f-mono);
  font-size: .72rem;
  font-weight: 700;
  color: var(--clay);
}
.chapter-list__item:hover .chapter-list__marker .ic-ring{ opacity: 1; }

.chapter-list__body h3{
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 1.2rem;
  margin-bottom: .4rem;
  padding-top: .65rem;
}
.chapter-list__body p{ color: var(--ink-text-dim); max-width: 58ch; }

/* ==========================================================================
   LIVRO COMPLETO
   ========================================================================== */
.book__grid{
  display: grid;
  grid-template-columns: minmax(0,1.15fr) minmax(0,.85fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
.book__subtitle{
  font-family: var(--f-display);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--cyan);
  margin-bottom: 1.1rem;
}
.book h2{
  font-family: var(--f-display);
  font-weight: 500;
  font-size: var(--fs-h2);
  line-height: 1.05;
  margin-bottom: .5rem;
}
.book__list{ margin: 2rem 0 2.5rem; display: grid; gap: 1rem; }
.book__list li{
  position: relative;
  padding-left: 1.6rem;
  color: var(--chalk-2);
  font-size: .98rem;
}
.book__list li::before{
  content: "";
  position: absolute;
  left: 0; top: .55em;
  width: 8px; height: 1px;
  background: var(--cyan);
}
.book__actions{ display: block; }
.book__note{ font-family: var(--f-mono); font-size: .78rem; color: var(--chalk-2); }

.book__buy-box{
  position: relative;
  background: radial-gradient(120% 160% at 0% 0%, rgba(47,230,255,.1), transparent 60%), rgba(47,230,255,.04);
  border: 1px solid var(--cyan-soft);
  border-radius: 4px;
  padding: clamp(1.35rem, 2.5vw, 1.75rem) clamp(1.35rem, 2.5vw, 1.75rem) clamp(1.5rem, 3vw, 1.9rem);
  margin-bottom: 1.1rem;
}
.book__buy-label{
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: .76rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.1rem;
}
.book__kiwify{ display: flex; flex-wrap: wrap; gap: 1rem; }
.book__kiwify-btn{
  display: inline-flex;
  align-items: center;
  gap: .6em;
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .03em;
  padding: 1.05rem 1.5rem;
  border-radius: 2px;
  background: var(--cyan);
  color: var(--ink);
  box-shadow: 0 0 0 0 rgba(47,230,255,.5);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.book__kiwify-btn span{ font-size: 1.25em; line-height: 1; }
.book__kiwify-btn:hover{
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -8px rgba(47,230,255,.55);
}
.book__amazon-alt{ font-size: .85rem; color: var(--chalk-2); }
.book__amazon-alt a{ color: var(--chalk-2); text-decoration: underline; text-underline-offset: 2px; transition: color .25s var(--ease); }
.book__amazon-alt a:hover{ color: var(--cyan); }

.book__visual{ display: flex; justify-content: center; perspective: 1400px; }
.book-mock{
  position: relative;
  width: min(300px, 70vw);
  aspect-ratio: 3 / 4.4;
  display: flex;
  transform: rotateY(-18deg) rotateX(2deg);
  transition: transform .6s var(--ease);
}
.book-mock:hover{ transform: rotateY(-8deg) rotateX(1deg); }
.book-mock__spine{
  width: 18px;
  background: linear-gradient(90deg, #06070a, #16181d);
  border-radius: 3px 0 0 3px;
  box-shadow: inset -2px 0 4px rgba(0,0,0,.5);
}
.book-mock__cover{
  flex: 1;
  background:
    radial-gradient(120% 100% at 15% 0%, rgba(47,230,255,.16), transparent 55%),
    linear-gradient(155deg, #14161b 0%, #0b0c0f 60%, #08090b 100%);
  border: 1px solid rgba(244,241,232,.08);
  border-radius: 0 4px 4px 0;
  padding: 1.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  box-shadow: 22px 30px 60px -20px rgba(0,0,0,.6);
}
.book-mock__eyebrow{
  font-family: var(--f-mono);
  font-size: .58rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: auto;
}
.book-mock__title{
  font-family: var(--f-display);
  font-size: clamp(1.5rem, 4vw, 1.9rem);
  line-height: 1.05;
  color: var(--chalk);
  margin-block: 1.25rem .5rem;
}
.book-mock__sub{
  font-family: var(--f-body);
  font-size: .68rem;
  color: var(--chalk-2);
  letter-spacing: .02em;
  max-width: 20ch;
}
.book-mock__mark{ width: 34px; height: 34px; margin-top: auto; }
.book-mock__author{
  font-family: var(--f-mono);
  font-size: .6rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--chalk-2);
  margin-top: 1rem;
}

/* ==========================================================================
   AUTOR
   ========================================================================== */
.author__grid{
  display: grid;
  grid-template-columns: minmax(0,.8fr) minmax(0,1.2fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: center;
}
.author__frame{ position: relative; max-width: 420px; margin-inline: auto; }
.author__frame img{
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
}
.author__frame-corner{
  position: absolute;
  width: 22px; height: 22px;
  border: 2px solid var(--cyan);
}
.author__frame-corner--tl{ top: -8px; left: -8px; border-right: 0; border-bottom: 0; }
.author__frame-corner--tr{ top: -8px; right: -8px; border-left: 0; border-bottom: 0; }
.author__frame-corner--bl{ bottom: -8px; left: -8px; border-right: 0; border-top: 0; }
.author__frame-corner--br{ bottom: -8px; right: -8px; border-left: 0; border-top: 0; }
.author__frame-tag{
  position: absolute;
  left: 12px; bottom: 12px;
  background: rgba(10,11,13,.78);
  color: var(--cyan);
  font-family: var(--f-mono);
  font-size: .62rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .4rem .6rem;
  border-radius: 2px;
  backdrop-filter: blur(4px);
}

.author h2{
  font-family: var(--f-display);
  font-weight: 500;
  font-size: var(--fs-h2);
  margin-bottom: .35rem;
}
.author__role{
  font-family: var(--f-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clay);
  margin-bottom: 1.5rem;
}
.author__copy p{ color: var(--ink-text-dim); margin-bottom: 1.1rem; max-width: 62ch; }
.author__statement{
  font-family: var(--f-display);
  font-style: italic;
  font-size: clamp(1.3rem, 1.6vw, 1.65rem);
  color: var(--ink-text);
  line-height: 1.4;
  border-left: 2px solid var(--clay);
  padding-left: 1.25rem;
  margin-top: 1.75rem !important;
  max-width: 42ch;
}
.author__social{
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-top: 1.75rem;
  font-family: var(--f-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--clay);
  transition: color .25s var(--ease);
}
.author__social svg{ width: 18px; height: 18px; flex-shrink: 0; }
.author__social:hover{ color: var(--ink-text); }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{ background: var(--ink); border-top: 1px solid var(--line-dark); padding-top: clamp(3rem, 6vw, 5rem); }
.site-footer__inner{
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line-dark);
}
.brand--footer{ margin-bottom: .85rem; }
.site-footer__tagline{ color: var(--chalk-2); font-size: .92rem; max-width: 32ch; }
.site-footer__nav{ display: flex; flex-direction: column; gap: .75rem; }
.site-footer__nav a, .site-footer__social a{
  font-family: var(--f-mono);
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--chalk-2);
  transition: color .25s var(--ease);
  width: fit-content;
}
.site-footer__nav a:hover, .site-footer__social a:hover{ color: var(--cyan); }
.site-footer__social{ display: flex; flex-direction: column; gap: .75rem; align-items: flex-start; }
@media (min-width: 640px){
  .site-footer__social{ align-items: flex-end; }
}

.site-footer__bottom{
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
  padding-block: 1.75rem;
  font-size: .78rem;
  color: rgba(245,242,232,.62);
}
.site-footer__extra{
  font-family: var(--f-mono);
  color: rgba(245,242,232,.62);
  transition: color .25s var(--ease);
}
.site-footer__extra:hover{ color: var(--cyan); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px){
  .ooda{ grid-template-columns: repeat(2, 1fr); }
  .ebook__grid, .book__grid, .author__grid{ grid-template-columns: 1fr; }
  .book__visual{ order: -1; }
  .book-mock{ width: min(260px, 55vw); }
  .site-footer__inner{ grid-template-columns: 1fr 1fr; }
  .site-footer__nav{ grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; gap: 1.25rem; margin-top: .5rem; }
}

@media (max-width: 860px){
  .main-nav{
    position: fixed;
    inset: 0;
    top: 0;
    z-index: 90;
    background: rgba(10,11,13,.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform .4s var(--ease);
    padding: 6rem 2rem 2rem;
  }
  .main-nav.is-open{ transform: translateX(0); }
  .main-nav a{ font-size: 1.1rem; }
  .main-nav__lang{
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-top: .5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--line-dark);
    font-family: var(--f-mono);
    font-size: .85rem;
    letter-spacing: .06em;
  }
  .main-nav__lang a{ color: var(--chalk-2); }
  .main-nav__lang a[aria-current="true"]{ color: var(--cyan); font-weight: 700; pointer-events: none; }
  .main-nav__lang span{ color: var(--line-dark-strong); }
  .main-nav__social{
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .78rem !important;
    color: var(--cyan) !important;
  }
  .main-nav__social svg{ width: 20px; height: 20px; }
  .header-icon-link, .header-lang-switch{ display: none; }
  .nav-toggle{ display: flex; }
  .btn__label-full{ display: none; }
  .btn__label-short{ display: inline; }
}

@media (max-width: 720px){
  .ooda{ grid-template-columns: 1fr; }
  .lead-form__row{ grid-template-columns: 1fr; }
  .chapter-list__item{ grid-template-columns: 44px 1fr; gap: 1rem; }
  .chapter-list__marker{ width: 44px; height: 44px; }
  .chapter-list__marker-num{ font-size: .62rem; }
  .chapter-list::before{ left: 21px; }
  .site-footer__inner{ grid-template-columns: 1fr; }
  .site-footer__social{ align-items: flex-start; }
  .hero__headline{ max-width: 100%; }
}

@media (max-width: 480px){
  .hero{ padding-top: 5.5rem; }
  .book-mock{ transform: none; }
  .book-mock:hover{ transform: none; }
  .ebook__cover-frame{ transform: none; max-width: 260px; }
  .ebook__cover-frame:hover{ transform: none; }
  .ebook__cover-tag{ top: -10px; right: -10px; }
  .book__kiwify-btn{ flex: 1 1 100%; justify-content: center; }
}

/* ==========================================================================
   POLICY PAGE
   ========================================================================== */
.policy{ padding-top: clamp(8rem, 12vw, 10rem); }
.policy__intro{ max-width: 68ch; }
.policy__updated{
  font-family: var(--f-mono);
  font-size: .78rem;
  color: var(--clay);
  letter-spacing: .04em;
  margin-bottom: 1rem;
}
.policy__body{ max-width: 68ch; margin-top: 2.5rem; display: grid; gap: 2.25rem; }
.policy__body h2{
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 1.35rem;
  margin-bottom: .65rem;
}
.policy__body p, .policy__body li{ color: var(--ink-text-dim); line-height: 1.7; }
.policy__body ul{ display: grid; gap: .5rem; padding-left: 1.25rem; list-style: disc; }
.policy__back{
  display: inline-flex;
  align-items: center;
  gap: .5em;
  font-family: var(--f-mono);
  font-size: .8rem;
  color: var(--clay);
  margin-bottom: 2.5rem;
}
.policy__back:hover{ color: var(--ink-text); }