/* ============================================================
   KINTSUGI — base & shared chrome
   ============================================================ */

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font-family: var(--sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--accent-glow); color: var(--text); }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

/* ---- Atmosphere layers (fixed, behind everything) ---- */
.atmos {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
}
#ash { position: fixed; inset: 0; z-index: 1; pointer-events: none; }
.vignette {
  position: fixed; inset: 0; z-index: 2; pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 38%, transparent 40%, rgba(0,0,0,0.30) 78%, rgba(0,0,0,0.62) 100%),
    radial-gradient(150% 120% at 50% 120%, rgba(0,0,0,0.55), transparent 55%);
}
.grain {
  position: fixed; inset: -50%; z-index: 3; pointer-events: none;
  opacity: 0.04; mix-blend-mode: overlay;
  background-image: var(--grain-url);
  background-size: 220px 220px;
  animation: grain-shift 6s steps(6) infinite;
}
@keyframes grain-shift {
  0%{transform:translate(0,0)} 20%{transform:translate(-6%,3%)}
  40%{transform:translate(4%,-5%)} 60%{transform:translate(-3%,6%)}
  80%{transform:translate(5%,2%)} 100%{transform:translate(0,0)}
}
@media (prefers-reduced-motion: reduce){ .grain{animation:none} }

main, .page { position: relative; z-index: 5; }

/* ---- Layout helpers ---- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.measure { max-width: var(--maxw-text); }
.center { text-align: center; }
.section { position: relative; padding-block: var(--s-8); }
.section--tight { padding-block: var(--s-6); }

.rule {
  height: 1px; border: 0; margin: 0;
  background: var(--line);
}
.rule--accent { background: linear-gradient(90deg, transparent, var(--accent-line), transparent); }

/* ---- Type primitives ---- */
.eyebrow {
  font-family: var(--sans);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  display: inline-flex; align-items: center; gap: 0.7em;
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px; background: var(--accent-line);
}
.eyebrow--plain::before { display:none; }

.display {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
}
.display em { font-style: italic; font-weight: 400; color: var(--text); }
.display .accent { color: var(--accent); }

h1,h2,h3,h4 { font-family: var(--serif); font-weight: 500; margin: 0; }
.h1 { font-size: var(--fs-h1); line-height: 1.04; letter-spacing:-0.012em; }
.h2 { font-size: var(--fs-h2); line-height: 1.06; letter-spacing:-0.01em; }
.h3 { font-size: var(--fs-h3); line-height: 1.12; }

.lead {
  font-size: var(--fs-lead);
  line-height: 1.55;
  color: var(--text);
  font-weight: 400;
}
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.serif-italic { font-family: var(--serif); font-style: italic; font-weight: 400; }

.mono {
  font-family: var(--mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
}
.tag {
  font-family: var(--mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

p { margin: 0 0 1.1em; }
.prose p { color: var(--text-dim); }
.prose p strong { color: var(--text); font-weight: 600; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: height var(--t-med) var(--ease-out),
              background var(--t-med) var(--ease-out),
              border-color var(--t-med) var(--ease-out),
              backdrop-filter var(--t-med) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-condensed {
  height: var(--nav-h-condensed);
  background: rgba(14,16,19,0.72);
  backdrop-filter: blur(18px) saturate(1.1);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw); margin-inline: auto; width: 100%;
  padding-inline: var(--gutter);
  display: flex; align-items: center; gap: var(--s-4);
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand__mark { width: 26px; height: 26px; flex: none; }
.brand__name {
  font-family: var(--serif); font-weight: 600; font-size: 1.32rem;
  letter-spacing: 0.16em; text-transform: uppercase;
}
.brand__name .dot { color: var(--accent); }

.nav__links {
  margin-left: auto;
  display: flex; align-items: center; gap: clamp(0.6rem, 2vw, 1.9rem);
  position: relative;
}
.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  color: var(--text-dim);
  padding: 0.4rem 0.1rem;
  transition: color var(--t-fast) var(--ease-out);
  white-space: nowrap;
}
.nav__link:hover { color: var(--text); }
.nav__link.is-active { color: var(--text); }
.nav__underline {
  position: absolute; bottom: -2px; height: 1px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  transition: left var(--t-med) var(--ease-out), width var(--t-med) var(--ease-out), opacity var(--t-fast);
  opacity: 0; left: 0; width: 0;
  pointer-events: none;
}
.nav__cta { margin-left: clamp(0.4rem,1.5vw,0.8rem); }
.nav__burger { display:none; }

@media (max-width: 860px) {
  .nav__links { gap: 0.2rem; }
  .nav__link:not(.nav__cta-link) { display: none; }
  .nav__burger {
    display: inline-flex; flex-direction: column; gap: 5px;
    background: none; border: 0; padding: 8px; margin-left: auto;
  }
  .nav__burger span { width: 22px; height: 1.5px; background: var(--text); transition: var(--t-fast); }
  .nav.is-open .nav__burger span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
  .nav.is-open .nav__burger span:nth-child(2){ opacity: 0; }
  .nav.is-open .nav__burger span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }
  .nav__links { margin-left: 0; }
  .nav__cta { margin-left: auto; }
  .nav.has-mobile .nav__links.is-open {
    position: fixed; inset: var(--nav-h-condensed) 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: rgba(14,16,19,0.96); backdrop-filter: blur(20px);
    padding: var(--s-2) var(--gutter) var(--s-3);
    border-bottom: 1px solid var(--line);
  }
  .nav.has-mobile .nav__links.is-open .nav__link { display: block; width:100%; padding: 0.85rem 0; border-bottom: 1px solid var(--line-soft); font-size: 1.05rem; }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6em;
  font-family: var(--sans);
  font-size: var(--fs-sm); font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.85em 1.6em;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  background: none; color: var(--text);
  transition: background var(--t-fast) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out),
              transform var(--t-fast) var(--ease-out);
  will-change: transform;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--text); color: var(--deepest); font-weight: 600;
}
.btn--primary:hover { background: #fff; }
.btn--ghost {
  border-color: var(--line-strong); color: var(--text);
}
.btn--ghost:hover { border-color: var(--accent-line); background: var(--accent-faint); }
.btn--accent {
  border-color: var(--accent-line); color: var(--accent);
}
.btn--accent:hover { background: var(--accent-faint); border-color: var(--accent); }
.btn .arrow { transition: transform var(--t-fast) var(--ease-out); }
.btn:hover .arrow { transform: translateX(3px); }

.link-quiet {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-size: var(--fs-sm); color: var(--text-dim);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.link-quiet:hover { color: var(--text); border-color: var(--accent-line); }

/* ============================================================
   REVEAL ANIMATIONS
   ============================================================ */
[data-reveal] {
  opacity: 0; transform: translateY(26px);
  transition: opacity var(--t-rise) var(--ease-out), transform var(--t-rise) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal="fade"] { transform: none; }
[data-reveal="scale"] { transform: translateY(26px) scale(0.985); }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  position: relative; z-index: 5;
  background: var(--deepest);
  border-top: 1px solid var(--line);
  padding-block: var(--s-7) var(--s-4);
  margin-top: var(--s-8);
}
.footer__grid {
  display: grid; grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--s-5) var(--s-4);
}
@media (max-width: 760px){ .footer__grid { grid-template-columns: 1fr 1fr; } }
.footer__brand .brand__name { font-size: 1.5rem; }
.footer__tag { color: var(--text-dim); max-width: 30ch; margin-top: var(--s-2); font-size: var(--fs-sm); }
.footer__col h4 { font-family: var(--sans); font-size: var(--fs-eyebrow); letter-spacing: 0.24em; text-transform: uppercase; color: var(--text-faint); margin-bottom: var(--s-2); font-weight: 600; }
.footer__col a { display: block; color: var(--text-dim); font-size: var(--fs-sm); padding: 0.32rem 0; transition: color var(--t-fast); }
.footer__col a:hover { color: var(--text); }
.footer__base {
  display: flex; justify-content: space-between; align-items: center; gap: var(--s-2);
  margin-top: var(--s-6); padding-top: var(--s-3); border-top: 1px solid var(--line-soft);
  flex-wrap: wrap;
}
.footer__base .mono { color: var(--text-faint); }

/* ---- small util ---- */
.stack-1 > * + * { margin-top: var(--s-1); }
.stack-2 > * + * { margin-top: var(--s-2); }
.stack-3 > * + * { margin-top: var(--s-3); }
.stack-4 > * + * { margin-top: var(--s-4); }
.flex { display: flex; }
.gap-2 { gap: var(--s-2); }
.gap-3 { gap: var(--s-3); }
.wrap-btns { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; }
.hide { display: none !important; }

/* focus visibility */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }