/* =========================================================
   FolioLabs - warm, quiet, compact studio one-pager
   Vintage warmth (Sentient serif + warm paper) · Modern chrome (General Sans)
   Monotone: warm achromatic tones only, no chromatic accent.
   ========================================================= */

:root {
  --bg: #FAF8F5;          /* warm off-white paper */
  --surface: #FFFFFF;
  --ink: #1A1712;         /* warm near-black */
  --ink-2: #6B655C;       /* warm secondary text */
  --muted: #8C857B;       /* warm muted - aria-hidden decorative only (clears AA-large) */
  --line: rgba(26, 23, 18, 0.11);   /* hairline */
  --line-2: rgba(26, 23, 18, 0.18); /* stronger hairline */
  --hover: rgba(26, 23, 18, 0.045); /* hover wash */

  --serif: "Sentient", Georgia, "Times New Roman", serif;
  --sans: "General Sans", system-ui, -apple-system, "Segoe UI", sans-serif;

  --container: 1040px;
  --measure: 40rem;
  --gutter: clamp(1.25rem, 5vw, 2.75rem);
  --header-h: 60px;
  --radius: 3px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 8px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
em { font-style: italic; }

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

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(1.5rem, 3vw, 2.5rem);
  border-top: 1px solid var(--line);
}
.section__head { max-width: 44rem; }
.section__title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3.1vw, 2.2rem);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin-top: 0.6rem;
}
.section__lede {
  color: var(--ink-2);
  font-size: clamp(1.02rem, 1.3vw, 1.15rem);
  line-height: 1.62;
  margin-top: 1rem;
  max-width: var(--measure);
}

/* ---------- Section kickers (editorial serif) ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.98rem;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--ink-2);
}
.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 1.6rem;
  height: 1px;
  background: var(--line-2);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: fixed;
  top: 0; left: 0;
  transform: translateY(-120%);
  z-index: 200;
  margin: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--sans);
  font-weight: 500;
  border-radius: var(--radius);
  transition: transform 0.18s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- Buttons (sans chrome) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.7rem 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn--primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn--primary:hover { background: #000; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn--ghost:hover { background: var(--hover); border-color: var(--ink); }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}
.site-header.is-scrolled {
  background: rgba(250, 248, 245, 0.85);
  border-bottom-color: var(--line);
  -webkit-backdrop-filter: saturate(120%) blur(10px);
  backdrop-filter: saturate(120%) blur(10px);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--ink);
}
.wordmark__mark { width: 1.5rem; height: 1.4rem; flex: 0 0 auto; color: var(--ink); }
.wordmark__text { line-height: 1; }

/* =========================================================
   Hero (compact)
   ========================================================= */
.hero {
  padding-top: calc(var(--header-h) + clamp(1.5rem, 4vw, 2.75rem));
  padding-bottom: clamp(1.5rem, 3.5vw, 2.5rem);
}
.hero__inner { max-width: 40rem; }
.hero__title {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3.35rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-top: 0.7rem;
  text-wrap: balance;
}
.hero__lede {
  color: var(--ink-2);
  font-size: clamp(1.05rem, 1.4vw, 1.22rem);
  line-height: 1.6;
  margin-top: 1rem;
  max-width: 36rem;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.35rem;
}

/* =========================================================
   About - principles as a compact numbered row
   ========================================================= */
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
  margin-top: clamp(1.25rem, 2.5vw, 1.75rem);
  padding-top: clamp(1rem, 2vw, 1.4rem);
  border-top: 1px solid var(--line);
}
.principle__index {
  display: block;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.principle__title {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-top: 0.5rem;
}
.principle__text {
  color: var(--ink-2);
  font-size: 0.98rem;
  line-height: 1.55;
  margin-top: 0.35rem;
}

/* =========================================================
   Products - tonal cards (peek + infinite carousel)
   ========================================================= */
.gallery { margin-top: clamp(1.5rem, 3vw, 2.25rem); margin-inline: calc(50% - 50vw); }

.gallery__rail {
  --leaf-gap: clamp(1rem, 2vw, 1.5rem);
  display: flex;
  gap: var(--leaf-gap);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 0.4rem 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.gallery__rail::-webkit-scrollbar { display: none; }

/* each card = one leaf, peek width, its own monotone tone */
.leaf {
  --leaf-w: min(66vw, 1080px);
  flex: 0 0 var(--leaf-w);
  scroll-snap-align: center;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  min-height: clamp(300px, 42vh, 400px);
  padding: clamp(1.6rem, 3.5vw, 3rem);
  border-radius: 12px;
  background: var(--c-bg);
  color: var(--c-ink);
}
.leaf :focus-visible { outline-color: var(--c-ink); }

/* tonal ladder - dark = live, lighter = still in development */
.leaf--tessera {
  --c-bg: #1A1712; --c-ink: #FAF8F5; --c-ink-2: #BAB4A8;
  --c-line: rgba(255,255,255,0.22); --c-hover: rgba(255,255,255,0.09);
}
.leaf--maestro {
  --c-bg: #C7C2B9; --c-ink: #1A1712; --c-ink-2: #4C473F;
  --c-line: rgba(26,23,18,0.24); --c-hover: rgba(26,23,18,0.06);
}
.leaf--outliner {
  --c-bg: #E7E3DC; --c-ink: #1A1712; --c-ink-2: #5F5950;
  --c-line: rgba(26,23,18,0.16); --c-hover: rgba(26,23,18,0.04);
}

/* aside: index + meta + status */
.leaf__aside {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  border-right: 1px solid var(--c-line);
  padding-right: clamp(1rem, 2vw, 2rem);
}
.leaf__index {
  font-family: var(--sans);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  line-height: 1;
  color: var(--c-ink);
  opacity: 0.5;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.leaf__meta {
  font-family: var(--sans);
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--c-ink-2);
  margin-top: 0.15rem;
}
.leaf__status { margin-top: auto; }
.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--c-ink-2);
}
.status::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.status--live::before { background: var(--c-ink); }
.status--dev::before { box-shadow: inset 0 0 0 1.5px var(--c-ink-2); }

/* body: name, promise, descriptor, text, flow, actions */
.leaf__body { display: flex; flex-direction: column; }
.leaf__name {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.leaf__wip {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--c-ink-2);
}
.leaf__promise {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 1.9vw, 1.5rem);
  font-weight: 400;
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin-top: 0.7rem;
  max-width: 32rem;
}
.leaf__descriptor {
  font-family: var(--serif);
  font-style: italic;
  color: var(--c-ink-2);
  font-size: 1.02rem;
  margin-top: 0.55rem;
}
.leaf__text {
  font-family: var(--sans);
  color: var(--c-ink-2);
  font-size: 1rem;
  line-height: 1.6;
  margin-top: 0.85rem;
  max-width: 34rem;
}
.leaf__flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.1rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--c-ink);
}
.leaf__step { color: var(--c-ink); }
.leaf__arrow { color: var(--c-ink-2); }
.leaf__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: auto;
  padding-top: 1.4rem;
}
.leaf .btn { font-size: 0.9rem; padding: 0.68rem 1.05rem; }
.leaf .btn--primary { background: var(--c-ink); color: var(--c-bg); border-color: var(--c-ink); }
.leaf .btn--primary:hover { opacity: 0.88; }
.leaf .btn--ghost { color: var(--c-ink); border-color: var(--c-line); }
.leaf .btn--ghost:hover { background: var(--c-hover); border-color: var(--c-ink); }

/* ---- controls: dots + arrows ---- */
.gallery__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.15rem;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.gallery__dots { display: flex; align-items: center; gap: 0.6rem; }
.dot {
  width: 9px; height: 9px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.dot:hover { border-color: var(--ink); }
.dot[aria-current="true"] { background: var(--ink); border-color: var(--ink); transform: scale(1.2); }

.gallery__nav { display: flex; gap: 0.5rem; }
.gallery__btn {
  width: 42px; height: 42px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--sans);
  font-size: 1.05rem;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, opacity 0.18s ease;
}
.gallery__btn:hover { background: var(--hover); border-color: var(--ink); }
.gallery__btn:disabled { opacity: 0.3; cursor: default; }

/* active card is emphasized; inactive stays dimmed (never blank) - gated by .js-reveal */
.js-reveal .leaf__body,
.js-reveal .leaf__aside {
  opacity: 0.55;
  transition: opacity 0.5s ease;
}
.js-reveal .leaf.is-active .leaf__body,
.js-reveal .leaf.is-active .leaf__aside {
  opacity: 1;
}

/* =========================================================
   Contact
   ========================================================= */
.contact__inner { max-width: 44rem; }
.contact__actions { margin-top: 1.4rem; }
.contact__actions .btn { font-size: 0.98rem; padding: 0.82rem 1.4rem; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 1.6rem;
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-footer__copy {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--ink-2);
}

/* =========================================================
   Reveal (JS-gated; off under reduced motion)
   ========================================================= */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  will-change: opacity, transform;
}
.js-reveal [data-reveal].is-visible { opacity: 1; transform: none; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 720px) {
  body { font-size: 16px; }

  .principles { grid-template-columns: 1fr; gap: 1.15rem; }
  .principle { display: block; }

  .leaf { --leaf-w: 82vw; grid-template-columns: 1fr; gap: 1.1rem; }
  .leaf__aside { border-right: none; border-bottom: 1px solid var(--c-line); padding-right: 0; padding-bottom: 1rem; }
  .leaf__status { margin-top: 0.5rem; }
}

@media (max-width: 400px) {
  .hero__actions .btn,
  .leaf__actions .btn { width: 100%; }
}

/* Respect reduced motion everywhere */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .js-reveal [data-reveal],
  .js-reveal .leaf__body,
  .js-reveal .leaf__aside { opacity: 1 !important; transform: none !important; }
}