/* ============================================================
   Fronteira Interior — design system
   Edição I · 2026
   ============================================================ */

:root {
  /* Palette — aubergine profunda */
  --bg:        #2B1B2E;
  --bg-2:      #311F34;
  --bg-3:      #38243C;
  --rule:      rgba(240, 230, 214, 0.12);
  --rule-soft: rgba(240, 230, 214, 0.07);
  --ink:       #F0E6D6;
  --ink-dim:   rgba(240, 230, 214, 0.72);
  --ink-mute:  rgba(240, 230, 214, 0.48);
  --ink-faint: rgba(240, 230, 214, 0.30);
  --accent:    #C9A66B;          /* ouro velho */
  --accent-2:  #A8884F;
  --accent-ink: rgba(201, 166, 107, 0.85);

  /* Type */
  --serif: "Newsreader", "Iowan Old Style", "Garamond", "Times New Roman", serif;
  --sans:  "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:  "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;

  /* Scale */
  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.375rem;
  --step-3: 1.75rem;
  --step-4: 2.25rem;
  --step-5: 3rem;
  --step-6: 4rem;
  --step-7: 5.5rem;
  --step-8: 7.5rem;

  /* Layout */
  --page-max: 1320px;
  --gutter: clamp(20px, 4vw, 56px);
}

/* Cream (light) variant — toggleable (também usado como default
   em páginas de texto longo: sobre, método) */
[data-theme="cream"] {
  --bg:        #F2EBDC;
  --bg-2:      #ECE4D2;
  --bg-3:      #E5DCC5;
  --rule:      rgba(43, 27, 46, 0.18);
  --rule-soft: rgba(43, 27, 46, 0.09);
  --ink:       #2B1B2E;
  --ink-dim:   rgba(43, 27, 46, 0.74);
  --ink-mute:  rgba(43, 27, 46, 0.50);
  --ink-faint: rgba(43, 27, 46, 0.30);
  /* Accent precisa de mais contraste sobre cream */
  --accent:     #8A5A2B;          /* siena queimada */
  --accent-2:   #6E4520;
  --accent-ink: rgba(138, 90, 43, 0.88);
}

/* ============================================================
   Reset + base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss02", "kern";
  transition: background-color .4s ease, color .4s ease;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* Selection */
::selection { background: var(--accent); color: var(--bg); }

/* ============================================================
   Type
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(2.5rem, 6vw, var(--step-7)); }
h2 { font-size: clamp(2rem, 4.4vw, var(--step-6)); }
h3 { font-size: clamp(1.5rem, 2.6vw, var(--step-4)); line-height: 1.18; }
h4 { font-size: var(--step-2); line-height: 1.25; }

p { margin: 0 0 1em; text-wrap: pretty; }
em { font-style: italic; color: var(--ink); }

.lead {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1.8vw, 1.625rem);
  line-height: 1.45;
  font-weight: 400;
  color: var(--ink);
}

.body-prose {
  max-width: 64ch;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink-dim);
}
.body-prose p { margin-bottom: 1.2em; }
.body-prose em {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.08em;
  color: var(--ink);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}

.caps {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
}

.pull {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  line-height: 1.4;
  color: var(--ink);
  text-wrap: balance;
}

/* ============================================================
   Layout primitives
   ============================================================ */
.wrap {
  max-width: var(--page-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section {
  padding-top: clamp(80px, 11vw, 160px);
  padding-bottom: clamp(80px, 11vw, 160px);
}
.section--tight { padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(48px, 7vw, 96px); }

/* ------------------------------------------------------------
   Cream band — full-bleed inverted block within a dark page.
   Locally scopes the cream palette so all children (text, rules,
   accent, eyebrow, links) re-skin automatically. Use sparingly
   for manifesto, pull-quotes, biographical pauses.
   ------------------------------------------------------------ */
.band--cream {
  --bg:        #F2EBDC;
  --bg-2:      #ECE4D2;
  --bg-3:      #E5DCC5;
  --rule:      rgba(43, 27, 46, 0.18);
  --rule-soft: rgba(43, 27, 46, 0.09);
  --ink:       #2B1B2E;
  --ink-dim:   rgba(43, 27, 46, 0.74);
  --ink-mute:  rgba(43, 27, 46, 0.50);
  --ink-faint: rgba(43, 27, 46, 0.30);
  --accent:    #8A5A2B;
  --accent-2:  #6E4520;

  background: var(--bg);
  color: var(--ink);
  padding-top: clamp(80px, 10vw, 150px);
  padding-bottom: clamp(80px, 10vw, 150px);
  position: relative;
}
/* Hairline transition above/below a cream band so it doesn't slam */
.band--cream + *:not(.band--cream) {
  border-top: 1px solid rgba(240, 230, 214, 0.08);
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}
.rule-soft { border-top-color: var(--rule-soft); }

/* ============================================================
   Header / nav
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  background: color-mix(in oklab, var(--bg) 84%, transparent);
  border-bottom: 1px solid var(--rule-soft);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 22px 0;
}
.brand {
  font-family: var(--serif);
  font-size: 1.0625rem;
  letter-spacing: 0.005em;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}
.brand-mark {
  display: inline-block;
  color: var(--accent);
  position: relative;
  top: 4px;
}
.brand-mark circle {
  transform-origin: center;
  transform-box: fill-box;
}
.brand strong {
  font-weight: 400;
}
.brand small {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-left: 2px;
}

.nav-links {
  display: flex;
  gap: clamp(18px, 2.4vw, 32px);
  list-style: none;
  padding: 0; margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav-links a {
  color: var(--ink-dim);
  transition: color .25s ease;
  position: relative;
  padding-bottom: 4px;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.is-active { color: var(--accent); }
.nav-links a.is-active::after {
  content:"";
  position:absolute;
  left:0; right:0; bottom:-2px;
  height:1px;
  background: var(--accent);
}

@media (max-width: 820px) {
  .nav-links { display: none; }
}

.nav-main {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 36px);
}
.nav-breathe {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: lowercase;
  color: var(--ink-mute);
  padding: 6px 0;
  transition: color .25s ease;
}
.nav-breathe:hover { color: var(--accent); }
.nav-breathe__dots {
  display: inline-block;
  color: var(--accent);
}
.nav-breathe__dots circle {
  transform-origin: center;
  transform-box: fill-box;
  animation: breathe-pulse 4s ease-in-out infinite;
}
.nav-breathe__dots circle:nth-child(1) { animation-delay: 0s; }
.nav-breathe__dots circle:nth-child(2) { animation-delay: 1.3s; }
.nav-breathe__dots circle:nth-child(3) { animation-delay: 2.6s; }
@keyframes breathe-pulse {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50%      { opacity: 1;    transform: scale(1.5); }
}

.breathe-overlay {
  position: fixed; inset: 0;
  background: color-mix(in oklab, var(--bg) 94%, black);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  z-index: 1000;
  transition: opacity .6s ease;
}
.breathe-overlay.is-open { opacity: 1; pointer-events: auto; }
.breathe-overlay__close {
  position: absolute; top: 24px; right: 24px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 8px 12px;
  border: 1px solid var(--rule);
  transition: color .25s, border-color .25s;
}
.breathe-overlay__close:hover { color: var(--accent); border-color: var(--accent); }
.breathe-stage {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 56px;
}
.breathe-orb {
  width: 120px; height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, color-mix(in oklab, var(--accent) 70%, var(--bg)), var(--accent));
  box-shadow: 0 0 80px rgba(181, 130, 75, 0.35), inset 0 0 30px rgba(0,0,0,0.25);
  transform: scale(0.7);
  transition: transform 4s cubic-bezier(.4,0,.4,1);
}
.breathe-orb.in  { transform: scale(1.6); }
.breathe-orb.out { transform: scale(0.7); }
.breathe-label {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--accent);
  margin: 0;
  letter-spacing: 0.02em;
  transition: opacity .6s ease;
}
.breathe-haiku {
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink-mute);
  margin: 0;
  max-width: 32ch;
  text-wrap: balance;
}
.breathe-haiku span { display: block; }
.breathe-haiku em { font-style: italic; color: var(--accent); }

/* ============================================================
   Buttons / links
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 14px 22px;
  border: 1px solid var(--rule);
  color: var(--ink);
  transition: border-color .25s ease, color .25s ease, background-color .25s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn--accent { border-color: var(--accent); color: var(--accent); }
.btn--accent:hover { background: var(--accent); color: var(--bg); }
.btn .arrow { display: inline-block; transition: transform .25s ease; }
.btn:hover .arrow { transform: translateX(4px); }

.link-quiet {
  position: relative;
  color: var(--ink);
  border-bottom: 1px solid var(--ink-faint);
  padding-bottom: 1px;
  transition: border-color .25s ease, color .25s ease;
}
.link-quiet:hover { border-bottom-color: var(--accent); color: var(--accent); }

/* ============================================================
   Hanko / shokunin marks
   ============================================================ */
.hanko {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  display: inline-grid;
  place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.3rem;
  color: var(--accent);
  position: relative;
}
.hanko::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0.45;
}

/* ============================================================
   Photo placeholders — monocromáticos, com legenda
   ============================================================ */
.photo {
  position: relative;
  background:
    repeating-linear-gradient(135deg,
      transparent 0,
      transparent 11px,
      rgba(232, 226, 214, 0.035) 11px,
      rgba(232, 226, 214, 0.035) 12px),
    linear-gradient(180deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--rule-soft);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
}
[data-theme="cream"] .photo {
  background:
    repeating-linear-gradient(135deg,
      transparent 0,
      transparent 11px,
      rgba(26, 21, 16, 0.04) 11px,
      rgba(26, 21, 16, 0.04) 12px),
    linear-gradient(180deg, var(--bg-3), var(--bg-2));
}
.photo__caption {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.photo__caption::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--ink-mute);
  display: inline-block;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--rule-soft);
  padding-top: 96px;
  padding-bottom: 56px;
  margin-top: 80px;
  background: var(--bg-2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 56px;
  margin-bottom: 88px;
}
@media (max-width: 820px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
.footer-col h5 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 22px;
  font-weight: 500;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--serif);
  font-size: 1.0625rem;
}
.footer-col ul a { color: var(--ink-dim); transition: color .25s ease; }
.footer-col ul a:hover { color: var(--accent); }

.colofon {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.colofon p { margin: 0; }
.colofon .edition {
  color: var(--accent);
}

/* ============================================================
   Reveal on scroll
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 1s ease, transform 1.1s ease;
  transition-delay: var(--rd, 0ms);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   Utilities
   ============================================================ */
.muted { color: var(--ink-dim); }
.faint { color: var(--ink-mute); }
.accent { color: var(--accent); }
.serif { font-family: var(--serif); }
.mono  { font-family: var(--mono); }
.italic { font-style: italic; }
.center { text-align: center; }
.right  { text-align: right; }

/* External link arrow — SVG override to prevent iOS emoji substitution */
.ext-arrow {
  display: inline-block;
  vertical-align: middle;
  margin-left: 4px;
  margin-bottom: 1px;
  flex-shrink: 0;
}