/* ==========================================================================
   Maison Maat — site styles (home + project detail)
   ========================================================================== */

:root {
  --paper: #ffffff;
  --ink: #161514;
  --ink-soft: #3d3a36;
  --mute: #8d887f;
  --line: rgba(22, 21, 20, 0.13);
  --serif-en: "Cormorant Garamond", "Noto Serif KR", "Times New Roman", serif;
  --serif-ko: "Noto Serif KR", "Cormorant Garamond", serif;
  --sans: "Pretendard", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Apple SD Gothic Neo", sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.21, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: clamp(18px, 2.6vw, 40px);
  --header-h: 76px;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: keep-all;
  overflow-wrap: break-word;
  transition: background-color 0.9s var(--ease);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  text-transform: inherit;
  letter-spacing: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Small uppercase UI label used across the site */
.label {
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.link-line {
  position: relative;
  display: inline-block;
}
.link-line::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s var(--ease-out);
}
.link-line:hover::after,
.link-line.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 50;
  pointer-events: none;
}
.site-header > * {
  pointer-events: auto;
}

.brand img {
  height: 17px;
  width: auto;
  transition: opacity 0.4s var(--ease);
}
.brand:hover img {
  opacity: 0.55;
}

.nav {
  display: flex;
  gap: clamp(18px, 2.4vw, 36px);
  color: var(--ink);
}

.page .site-header {
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform 0.6s var(--ease-out);
}
.page .site-header.is-hidden {
  transform: translateY(-100%);
}

/* Contact panel */
.mail-pop {
  position: fixed;
  top: calc(var(--header-h) - 8px);
  right: var(--gutter);
  z-index: 80;
  padding: 18px 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(22, 21, 20, 0.08);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.4s var(--ease), transform 0.5s var(--ease-out), visibility 0s linear 0.4s;
}
.mail-pop.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 0.4s var(--ease), transform 0.5s var(--ease-out), visibility 0s;
}
.mail-pop-addr {
  font-family: var(--serif-en);
  font-size: 22px;
  line-height: 1.2;
  text-transform: none;
  letter-spacing: 0;
  transition: opacity 0.3s;
}
.mail-pop-addr:hover {
  opacity: 0.55;
}

.copy-tip {
  position: fixed;
  z-index: 90;
  pointer-events: none;
  color: var(--ink);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s var(--ease), transform 0.4s var(--ease-out);
}
.copy-tip.is-on {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   Intro curtain (first visit per session)
   ========================================================================== */

.intro {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--paper);
  display: grid;
  place-items: center;
  transition: opacity 0.9s var(--ease) 0.15s, visibility 0s linear 1.05s;
}
.intro img {
  height: 20px;
  width: auto;
  opacity: 0;
  animation: introLogo 1.4s var(--ease-out) forwards;
}
.intro .label {
  position: absolute;
  bottom: var(--gutter);
  left: 0;
  right: 0;
  text-align: center;
  color: var(--mute);
  opacity: 0;
  animation: introLogo 1.4s var(--ease-out) 0.25s forwards;
}
.intro.is-done {
  opacity: 0;
  visibility: hidden;
}
@keyframes introLogo {
  from { opacity: 0; transform: translateY(8px); letter-spacing: 0.24em; }
  to { opacity: 1; transform: none; }
}

/* Holding page: works hidden, the intro logo stays as the home screen */
.is-holding .intro {
  z-index: 10;
  background: transparent;
  pointer-events: none;
}

/* Image collage behind the logo */
.collage {
  position: fixed;
  inset: 0;
  z-index: 5;
  overflow: hidden;
  cursor: pointer;
}
.collage-item {
  position: absolute;
  margin: 0;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 0.9s var(--ease), transform 1.6s var(--ease-out);
}
.collage-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.collage-item.is-in {
  opacity: 1;
  transform: none;
}
.collage-item.is-ghost {
  opacity: 0.14;
  transition: opacity 1.2s var(--ease);
}
.collage-item.is-ghost ~ .collage-item.is-ghost {
  opacity: 0.22;
}
.is-holding .site-header .nav {
  flex: 1;
  justify-content: space-between;
}
.is-holding .site-header > .brand,
.is-holding [data-open="index"],
.is-holding .stage,
.is-holding .stage-foot,
.is-holding .cursor,
.is-holding #index {
  display: none;
}

/* ==========================================================================
   Home — fullscreen stage
   ========================================================================== */

.home {
  overflow: hidden;
  height: 100svh;
}

.stage {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  padding: calc(var(--header-h) + 8px) var(--gutter) 112px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.1s var(--ease), visibility 0s linear 1.1s;
}
.slide.is-active {
  opacity: 1;
  visibility: visible;
  transition: opacity 1.1s var(--ease), visibility 0s;
  z-index: 1;
}

.slide-media {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.slide-media img {
  width: auto;
  height: auto;
  max-width: calc(var(--scale, 90) * 1%);
  max-height: calc(var(--scale, 90) * 1%);
  object-fit: contain;
  transform: scale(1.035);
  transition: transform 2.4s var(--ease-out);
}
.slide.is-active .slide-media img {
  transform: none;
}
@media (hover: hover) and (pointer: fine) {
  .stage, .stage * { cursor: none; }
}

/* Bottom bar: caption + pager */
.stage-foot {
  position: fixed;
  left: var(--gutter);
  right: var(--gutter);
  bottom: calc(var(--gutter) * 0.9);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  z-index: 20;
  pointer-events: none;
}
.stage-foot > * {
  pointer-events: auto;
}

.caption {
  display: flex;
  align-items: baseline;
  gap: 18px;
  min-width: 0;
}
.caption-num {
  font-family: var(--serif-en);
  font-size: 15px;
  font-style: italic;
  color: var(--mute);
  font-variant-numeric: lining-nums tabular-nums;
}
.caption-body {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.caption-title {
  font-family: var(--serif-en);
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.005em;
}
.caption-cat {
  color: var(--mute);
}
.caption-swap {
  transition: opacity 0.5s var(--ease), transform 0.7s var(--ease-out);
}
.caption-swap.is-out {
  opacity: 0;
  transform: translateY(6px);
}

.pager {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.pager button {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  font-size: 15px;
  transition: opacity 0.3s, transform 0.4s var(--ease-out);
}
.pager button:hover {
  opacity: 0.5;
}
.pager [data-dir="-1"]:hover { transform: translateX(-3px); }
.pager [data-dir="1"]:hover { transform: translateX(3px); }

.count {
  display: flex;
  align-items: center;
  gap: 12px;
  font-variant-numeric: tabular-nums;
}
.count-bar {
  position: relative;
  width: clamp(48px, 7vw, 96px);
  height: 1px;
  background: var(--line);
  overflow: hidden;
}
.count-bar i {
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform-origin: left;
  transform: scaleX(var(--progress, 0.2));
  transition: transform 0.9s var(--ease-out);
}

/* Custom cursor label */
.cursor {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  will-change: transform;
}
.cursor span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px 8px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 100px;
  transform: translate(-50%, -50%) scale(0.6);
  transition: transform 0.45s var(--ease-out);
  white-space: nowrap;
}
.cursor.is-visible {
  opacity: 1;
}
.cursor.is-visible span {
  transform: translate(-50%, -50%) scale(1);
}
.cursor.is-arrow span {
  background: transparent;
  color: var(--ink);
  font-size: 22px;
  padding: 0;
  letter-spacing: 0;
}
@media (hover: none) {
  .cursor { display: none; }
}

/* ==========================================================================
   Overlays (Index / About)
   ========================================================================== */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: var(--paper);
  color: var(--ink);
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s var(--ease), visibility 0s linear 0.7s;
}
.overlay.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.7s var(--ease), visibility 0s;
}
.overlay-head {
  position: sticky;
  top: 0;
  height: var(--header-h);
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--paper);
  z-index: 2;
}
.overlay-inner {
  padding: 4vh var(--gutter) 12vh;
}
.overlay .reveal-item {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.9s var(--ease), transform 1.1s var(--ease-out);
}
.overlay.is-open .reveal-item {
  opacity: 1;
  transform: none;
  transition-delay: calc(var(--i, 0) * 60ms + 150ms);
}

/* Index list */
.index-list {
  list-style: none;
  border-top: 1px solid var(--line);
}
.index-row a {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) minmax(0, 0.8fr) 80px 120px;
  align-items: center;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: padding 0.6s var(--ease-out), color 0.4s;
}
.index-num {
  font-family: var(--serif-en);
  font-style: italic;
  color: var(--mute);
}
.index-title {
  font-family: var(--serif-en);
  font-size: clamp(24px, 3vw, 44px);
  line-height: 1.1;
}
.index-title small {
  display: block;
  margin-top: 6px;
  font-family: var(--serif-ko);
  font-size: 12px;
  color: var(--mute);
}
.index-cat,
.index-year {
  color: var(--mute);
}
.index-thumb {
  justify-self: end;
  width: 120px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #f4f3f0;
}
.index-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  filter: grayscale(1);
  opacity: 0.85;
  transition: transform 1s var(--ease-out), filter 0.6s, opacity 0.6s;
}
@media (hover: hover) {
  .index-list:hover .index-row a { color: var(--mute); }
  .index-list .index-row a:hover { color: var(--ink); padding-left: 14px; }
  .index-row a:hover .index-thumb img { transform: none; filter: none; opacity: 1; }
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: 64px;
  max-width: 1440px;
}
.about-tagline {
  grid-column: 1 / -1;
  font-family: var(--serif-en);
  font-size: clamp(40px, 7vw, 108px);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.02em;
}
.about-tagline em {
  font-style: italic;
}
.about-statement {
  grid-column: 5 / span 7;
  display: grid;
  gap: 28px;
}
.about-statement .en {
  font-family: var(--serif-en);
  font-size: clamp(19px, 1.6vw, 24px);
  line-height: 1.5;
}
.about-statement .ko {
  font-family: var(--serif-ko);
  font-size: 14px;
  line-height: 2.05;
  color: var(--ink-soft);
  font-weight: 300;
}
.about-meta {
  grid-column: 5 / span 8;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gutter);
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.about-meta .label {
  display: block;
  color: var(--mute);
  margin-bottom: 12px;
}
.about-meta p {
  white-space: pre-line;
  line-height: 1.8;
}

/* ==========================================================================
   Project detail page (layout after kei-inc.jp/projects)
   ========================================================================== */

.page main {
  padding-top: var(--header-h);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  padding: 0 var(--gutter);
}

/* Head: title (left) + vertical copy (right) */
.p-head {
  align-items: end;
  padding-top: clamp(40px, 8vh, 96px);
  padding-bottom: 28px;
}
.p-title {
  grid-column: 1 / span 10;
  align-self: end;
}
.p-title h1 {
  font-family: var(--serif-en);
  font-size: clamp(34px, 4.6vw, 72px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.015em;
}
.p-title .ko {
  margin-top: 14px;
  font-family: var(--serif-ko);
  font-size: 13px;
  color: var(--mute);
  font-weight: 300;
}
.p-cat {
  display: block;
  margin-bottom: 18px;
  color: var(--mute);
}
/* Hero */
.p-hero {
  margin: 0 var(--gutter);
  background: var(--bg, #fff);
  overflow: hidden;
}
.p-hero img {
  width: 100%;
  height: auto;
  max-height: 92vh;
  object-fit: contain;
  margin: 0 auto;
}

/* Meta row */
.p-meta {
  padding-top: 18px;
  padding-bottom: clamp(80px, 14vh, 160px);
}
.p-meta-list {
  grid-column: 1 / span 5;
  display: grid;
  grid-template-columns: 72px 1fr;
  row-gap: 4px;
  column-gap: 12px;
  font-size: 12.5px;
}
.p-meta-list dt {
  color: var(--mute);
}
.p-meta-link {
  grid-column: 10 / span 3;
  justify-self: end;
  align-self: start;
  font-size: 12.5px;
}
.p-meta-rule {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--line);
  margin-bottom: 18px;
  order: -1;
}

/* Text sections (lead + text blocks) */
.p-text {
  padding-bottom: clamp(80px, 14vh, 160px);
}
.p-text-inner {
  grid-column: 5 / span 6;
}
.p-text h2 {
  font-family: var(--serif-ko);
  font-size: clamp(19px, 1.7vw, 25px);
  font-weight: 500;
  line-height: 1.75;
  letter-spacing: 0.01em;
  white-space: pre-line;
  margin-bottom: 36px;
}
.p-text p {
  font-family: var(--serif-ko);
  font-size: 14px;
  line-height: 2.15;
  font-weight: 300;
  color: var(--ink-soft);
  white-space: pre-line;
  max-width: 40em;
}
.p-text.is-left .p-text-inner {
  grid-column: 1 / span 6;
}

/* Image blocks */
.p-block {
  padding-bottom: clamp(48px, 9vh, 120px);
}
.p-figure {
  margin: 0;
}
.p-figure .plate {
  background: var(--bg, transparent);
  overflow: hidden;
}
.p-figure .plate.has-bg {
  padding: clamp(20px, 5vw, 80px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.p-figure img {
  width: 100%;
  height: auto;
}
.p-figure .plate.has-bg img {
  width: auto;
  max-width: 100%;
  max-height: 80vh;
}
.p-figure figcaption {
  margin-top: 12px;
  font-size: 11.5px;
  color: var(--mute);
}
.size-full { grid-column: 1 / -1; }
.size-wide { grid-column: 2 / span 10; }
.size-medium { grid-column: 4 / span 6; }
.size-small-left { grid-column: 1 / span 5; }
.size-small-right { grid-column: 8 / span 5; }

/* Pair: KEI-style large + small, top aligned */
.pair-large-left > :first-child { grid-column: 1 / span 7; }
.pair-large-left > :last-child { grid-column: 8 / span 5; align-self: start; }
.pair-large-right > :first-child { grid-column: 1 / span 5; align-self: end; }
.pair-large-right > :last-child { grid-column: 6 / span 7; }
.pair-equal > :first-child { grid-column: 1 / span 6; }
.pair-equal > :last-child { grid-column: 7 / span 6; }

/* Gallery */
.p-gallery {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr));
  gap: var(--gutter);
}
.p-gallery .plate img {
  aspect-ratio: var(--ratio, auto);
  object-fit: cover;
}

/* Credits */
.p-credits {
  padding-top: 28px;
  padding-bottom: clamp(80px, 14vh, 160px);
}
.p-credits::before {
  content: "";
  grid-column: 1 / -1;
  height: 1px;
  background: var(--line);
  margin-bottom: 28px;
}
.p-credits .label {
  grid-column: 1 / span 4;
  color: var(--mute);
}
.p-credits p {
  grid-column: 5 / span 7;
  font-size: 12.5px;
  line-height: 2;
  color: var(--ink-soft);
  white-space: pre-line;
}

/* Footer */
.site-footer {
  padding: 36px var(--gutter) 28px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: 28px;
  font-size: 12px;
}
.site-footer .f-brand { grid-column: 1 / span 4; font-family: var(--serif-en); font-size: 20px; line-height: 1.2; }
.site-footer .f-brand em { display: block; font-size: 15px; color: var(--mute); }
.site-footer .f-col { grid-column: span 3; }
.site-footer .f-col .label { display: block; color: var(--mute); margin-bottom: 8px; }
.site-footer .f-copy { grid-column: 1 / -1; color: var(--mute); font-size: 11px; }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1.2s var(--ease), transform 1.4s var(--ease-out);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

.preview-badge {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 90;
  background: #b4472c;
  color: #fff;
  padding: 8px 14px;
  border-radius: 100px;
}

.empty-state {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  font-family: var(--serif-en);
  font-size: 28px;
}
.empty-state a { display: block; margin-top: 12px; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  :root { --header-h: 60px; }

  .brand img { height: 13px; }
  .nav { gap: 16px; }
  .nav .hide-sm { display: none; }

  .slide { padding: calc(var(--header-h) + 4px) 14px 132px; }

  .stage-foot { flex-direction: column; align-items: stretch; gap: 16px; }
  .pager { justify-content: space-between; }
  .pager button { width: 30px; }

  .index-row a { grid-template-columns: 34px minmax(0, 1fr) 84px; gap: 14px; padding: 18px 0; }
  .index-cat, .index-year { display: none; }
  .index-thumb { width: 84px; }

  .about-statement, .about-meta { grid-column: 1 / -1; }
  .about-meta { grid-template-columns: 1fr; gap: 28px; }

  .p-title { grid-column: 1 / span 9; }
  .p-meta-list { grid-column: 1 / -1; }
  .p-meta-link { grid-column: 1 / -1; justify-self: start; margin-top: 18px; }
  .p-text-inner, .p-text.is-left .p-text-inner { grid-column: 1 / -1; }
  .size-wide, .size-medium, .size-small-left, .size-small-right { grid-column: 1 / -1; }
  .pair-large-left > *, .pair-large-right > *, .pair-equal > * { grid-column: 1 / -1 !important; }
  .pair-large-left > :last-child, .pair-large-right > :last-child, .pair-equal > :last-child { margin-top: var(--gutter); }
  .p-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .p-credits .label, .p-credits p { grid-column: 1 / -1; }
  .site-footer .f-brand, .site-footer .f-col { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
}