:root {
  --ink: #11110f;
  --paper: #ffffff;
  --paper-soft: #f5f5f5;
  --muted: #8a857b;
  --muted-2: #5e5950;
  --line: rgba(17, 17, 15, 0.12);
  --line-strong: rgba(17, 17, 15, 0.24);
  --white: #ffffff;
  --sans: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --serif: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --display: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --body: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --side: clamp(24px, 5vw, 88px);
  --max: 1440px;
  --topbar-h: 56px;
}

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

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.45;
  text-rendering: geometricPrecision;
  overflow-x: hidden;
}

img, video { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }

/* ─── SPA category transition ─── */
#cat-main {
  transition: opacity 220ms ease, transform 220ms ease;
}
#cat-main.is-leaving {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}
#cat-main.is-entering {
  opacity: 0;
  transform: translateY(-8px);
}

::selection { background: var(--ink); color: var(--paper); }

/* ─── Page Transition ─── */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: var(--ink);
  transform: translateY(100%);
  pointer-events: none;
}

.page-transition.is-entering {
  animation: curtain-in 600ms cubic-bezier(.76, 0, .24, 1) forwards;
}

@keyframes curtain-in {
  from { transform: translateY(100%); }
  to   { transform: translateY(0%); }
}

/* ─── Topbar ─── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 40;
  height: var(--topbar-h);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 0 var(--side);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.topbar__link,
.topbar__home,
.eyebrow {
  font-size: 11px;
  letter-spacing: 0.16em;
  line-height: 1;
  text-transform: uppercase;
}

.topbar__brand {
  white-space: nowrap;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1;
}

.topbar__nav {
  display: flex;
  justify-content: center;
  gap: clamp(14px, 2.4vw, 40px);
}

.topbar__link,
.topbar__home {
  position: relative;
  color: var(--muted);
  transition: color 180ms ease;
  white-space: nowrap;
}

.topbar__link::after,
.topbar__home::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 260ms cubic-bezier(.76, 0, .24, 1);
}

.topbar__link:hover,
.topbar__link.is-current,
.topbar__home:hover { color: var(--ink); }

.topbar__link:hover::after,
.topbar__link.is-current::after,
.topbar__home:hover::after { transform: scaleX(1); }

.topbar__link.is-current { color: var(--ink); }

/* ─── Top header — minimal ─── */
.cat-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: calc(var(--topbar-h) + clamp(48px, 6vw, 88px)) clamp(28px, 4vw, 64px) clamp(36px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0;
  color: var(--muted);
}

.cat-title {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(32px, 3.4vw, 52px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.025em;
}

/* ─── Layout — full-width stack ─── */
.cat-layout {
  display: block;
}

/* ─── Featured Works Grid (OH Architecture style) ─── */
.cat-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(80px, 8vw, 140px) clamp(36px, 4vw, 72px);
  padding: clamp(60px, 7vw, 110px) clamp(28px, 4vw, 64px) 0;
  max-width: var(--max);
  margin: 0 auto;
}

.cat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  text-decoration: none;
  cursor: pointer;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 800ms ease, transform 900ms cubic-bezier(.2,.7,.2,1);
}

.cat-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* Image — landscape 16:10 */
.cat-card__media {
  position: relative;
  overflow: hidden;
  background: var(--paper-soft);
  aspect-ratio: 5 / 4;
}

.cat-card__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.96);
  transition: opacity 500ms cubic-bezier(.4, 0, .2, 1);
}

.cat-card__media img[data-layer="base"] { opacity: 1; z-index: 1; }
.cat-card__media img[data-layer="swap"] { opacity: 0; z-index: 2; }

.cat-card.is-swapped .cat-card__media img[data-layer="base"] { opacity: 0; }
.cat-card.is-swapped .cat-card__media img[data-layer="swap"] { opacity: 1; }

/* Caption row: title + meta on the same line, flush with image */
.cat-card__caption {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 0;
}

.cat-card__title {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(20px, 1.6vw, 26px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.cat-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.cat-card__meta span {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.cat-card__meta span:not(:last-child)::after {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--muted);
  border-radius: 50%;
  opacity: 0.5;
}


/* Closing flourish at bottom of stack */
.cat-stack__end {
  grid-column: 1 / -1;
  display: grid;
  place-items: center;
  padding: clamp(80px, 9vw, 140px) clamp(20px, 4vw, 64px) clamp(50px, 6vw, 80px);
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--line);
  margin-top: clamp(60px, 7vw, 100px);
}

.cat-stack__end p {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.cat-stack__end a {
  font-family: var(--display);
  font-size: clamp(24px, 2.4vw, 36px);
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 4px;
}

/* ─── Reveal on init ─── */
.reveal-init {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(.2,.7,.2,1);
}
.reveal-init.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─── */
@media (max-width: 1080px) {
  .cat-stack {
    padding: clamp(50px, 6vw, 80px) clamp(20px, 4vw, 40px) 0;
    gap: clamp(60px, 7vw, 100px) clamp(24px, 3vw, 40px);
  }

}

@media (max-width: 760px) {
  .topbar { grid-template-columns: 1fr auto; }
  .topbar__nav { display: none; }

  .cat-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: calc(var(--topbar-h) + 40px) var(--side) 30px;
  }

  .cat-stack {
    grid-template-columns: 1fr;
    gap: clamp(50px, 8vw, 80px);
    padding: clamp(40px, 6vw, 60px) var(--side) 0;
  }

  .cat-card__media { aspect-ratio: 5 / 4; }

  .cat-card__title {
    font-size: clamp(18px, 4.5vw, 22px);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
  .cat-card { opacity: 1; transform: none; }
}