/* Tokens, tipografia e componentes compartilhados pelo site inteiro. */

:root {
  --bg: #F1F2EE;
  --surface: #E6E8E2;
  --ink: #1C2628;
  --muted: #566260;
  --line: #C6CCC3;
  --brass: #87652A;
  --brass-soft: #E8DEC6;
  --on-brass: #FBF8F1;
  --field: #FAFBF8;
  --error: #A23B2C;

  --f-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --f-body: "Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --s-1: .8125rem;
  --s0: 1rem;
  --s1: 1.1875rem;
  --s2: 1.5rem;
  --s3: 2.125rem;

  /* Curvas e tempos no espírito do San Francisco: suaves, com uma pontinha de mola. */
  --ease-standard: cubic-bezier(.25, .1, .25, 1);
  --ease-emphasized: cubic-bezier(.2, 0, 0, 1);
  --ease-spring: cubic-bezier(.22, 1, .36, 1);
  --dur-fast: 180ms;
  --dur-base: 280ms;
  --dur-slow: 520ms;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101617;
    --surface: #182021;
    --ink: #E4E7E1;
    --muted: #98A39F;
    --line: #2C3637;
    --brass: #CFA85E;
    --brass-soft: #2A2418;
    --on-brass: #151A1B;
    --field: #141B1C;
    --error: #E58A79;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #101617;
  --surface: #182021;
  --ink: #E4E7E1;
  --muted: #98A39F;
  --line: #2C3637;
  --brass: #CFA85E;
  --brass-soft: #2A2418;
  --on-brass: #151A1B;
  --field: #141B1C;
  --error: #E58A79;
  color-scheme: dark;
}

:root {
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: var(--s0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

h1, h2, h3 {
  font-family: var(--f-display);
  font-weight: 400;
  line-height: 1.12;
  text-wrap: balance;
  margin: 0;
}
h2 { font-size: var(--s3); }
h3 { font-size: var(--s2); }
p { margin: 0; max-width: 62ch; }
a { color: inherit; }

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

.wrap { max-width: 1080px; margin: 0 auto; }

.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--s-1);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--brass);
}

.muted { color: var(--muted); }

/* Topo compartilhado: sticky translúcido com blur, mesma lógica da nav do iOS. */
.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 18px;
  gap: 16px;
  background-color: color-mix(in oklab, var(--bg) 78%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-base) var(--ease-standard),
              border-color var(--dur-base) var(--ease-standard);
}
.top.is-scrolled {
  border-bottom-color: color-mix(in oklab, var(--line) 70%, transparent);
}
.mark {
  font-family: var(--f-display);
  font-size: var(--s2);
  letter-spacing: .01em;
  text-decoration: none;
  transition: opacity var(--dur-fast) var(--ease-standard);
}
.mark:hover { opacity: .72; }
.top nav { display: flex; gap: 22px; font-size: var(--s-1); }
.top nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 6px 2px;
  position: relative;
  transition: color var(--dur-fast) var(--ease-standard);
}
.top nav a::after {
  content: "";
  position: absolute;
  left: 2px; right: 2px; bottom: 2px;
  height: 1px;
  background: var(--brass);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-base) var(--ease-emphasized);
}
.top nav a:hover { color: var(--ink); }
.top nav a:hover::after { transform: scaleX(1); }
.top .back {
  font-size: .875rem;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-standard);
}
.top .back:hover { color: var(--ink); }

/* Botões: capsule, press state de verdade, sombra suave que insinua profundidade. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font: 600 var(--s0)/1 var(--f-body);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  will-change: transform;
  transition: transform var(--dur-fast) var(--ease-spring),
              background-color var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard),
              box-shadow var(--dur-base) var(--ease-standard);
}
.btn-solid {
  background: var(--ink);
  color: var(--bg);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 4px 14px -6px rgba(0, 0, 0, .14);
}
.btn-solid:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, .06), 0 14px 36px -14px rgba(28, 38, 40, .32);
}
.btn-solid:active {
  transform: translateY(0) scale(.985);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .04);
}
.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--ink);
  background-color: color-mix(in oklab, var(--ink) 5%, transparent);
}
.btn-ghost:active { transform: scale(.985); }
.btn[disabled] { opacity: .5; cursor: progress; transform: none; box-shadow: none; }

/* Honeypot anti spam */
.hp {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* Rodapé */
footer {
  border-top: 1px solid var(--line);
  padding-block: 28px 40px;
  font-size: var(--s-1);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}
footer a { color: inherit; text-decoration: none; }
footer a:hover { color: var(--ink); }
footer .f-links { display: flex; gap: 18px; flex-wrap: wrap; }

/* Scroll reveal: elementos entram em cena ao chegar na viewport. */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 720ms var(--ease-standard),
              transform 720ms var(--ease-emphasized);
  will-change: transform, opacity;
}
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 80ms; }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }

/* Transições suaves ao alternar tema. */
body,
.top,
.btn,
input,
textarea,
.offer,
.choice span,
.roda-fig,
.dim,
.faq details {
  transition-property: background-color, border-color, color, box-shadow, transform;
  transition-duration: var(--dur-base);
  transition-timing-function: var(--ease-standard);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn,
  .btn-solid:hover,
  .btn-ghost:hover,
  .btn-solid:active,
  .btn-ghost:active { transform: none; transition-duration: 0ms; }
  .top nav a::after { transition: none; }
}

@media (max-width: 640px) {
  .top nav { display: none; }
}