/* ==========================================================================
   JUNKBRANDING Architects — 建築と余白
   Design tokens / Base / Layout / Components / Pages / Motion
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  /* Color: 4 colors only (paper / surface / ink / stone) */
  --paper: #ecebe7;
  --surface: #dfddd8;
  --ink: #1f2020;
  --stone: #6f706c;
  --line: color-mix(in srgb, var(--ink) 16%, transparent);
  --line-strong: color-mix(in srgb, var(--ink) 40%, transparent);

  /* Type */
  --font-serif: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;

  --fs-display: clamp(2.5rem, 1.2rem + 5.6vw, 7rem);
  --fs-h1: clamp(2.125rem, 1.4rem + 3.2vw, 4.5rem);
  --fs-h2: clamp(1.625rem, 1.2rem + 1.8vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 1.05rem + 0.8vw, 1.625rem);
  --fs-lead: clamp(1.125rem, 0.98rem + 0.7vw, 1.5rem);
  --fs-body: 1rem;
  --fs-meta: 0.875rem;

  /* Space & grid */
  --margin: clamp(1.25rem, 0.6rem + 3.4vw, 4.5rem);
  --gap: clamp(0.75rem, 0.4rem + 1.4vw, 2rem);
  --section: clamp(6rem, 4rem + 9vw, 13rem);
  --header-h: 4.5rem;
  --max: 1680px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);
  --dur: 1.1s;

  --radius: 0;
}

/* ---------- 2. Base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.8;
  letter-spacing: 0.04em;
  font-feature-settings: "palt" 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-locked { overflow: hidden; }

img, video, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; letter-spacing: inherit; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
address { font-style: normal; }

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

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

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

.skip-link {
  position: fixed;
  top: 0.75rem; left: 0.75rem;
  z-index: 200;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-200%);
  transition: transform 0.3s var(--ease-out);
}
.skip-link:focus { transform: none; }

/* ---------- 3. Typography helpers ---------- */
.serif { font-family: var(--font-serif); }

.label {
  font-family: var(--font-sans);
  font-size: var(--fs-meta);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  line-height: 1.5;
  color: var(--stone);
}

.display {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--fs-display);
  line-height: 1.15;
  letter-spacing: 0.06em;
  text-wrap: balance;
}

.h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--fs-h1);
  line-height: 1.3;
  letter-spacing: 0.08em;
  text-wrap: balance;
}

.h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--fs-h2);
  line-height: 1.45;
  letter-spacing: 0.08em;
  text-wrap: balance;
}

.h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--fs-h3);
  line-height: 1.5;
  letter-spacing: 0.06em;
}

.lead {
  font-family: var(--font-serif);
  font-size: var(--fs-lead);
  line-height: 2;
  letter-spacing: 0.08em;
  text-wrap: pretty;
}

.prose { max-width: 36em; text-wrap: pretty; }
.prose > * + * { margin-top: 1.4em; }
.muted { color: var(--stone); }

/* ---------- 4. Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--margin);
}

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

.section { padding-block: var(--section); }
.section--tight { padding-block: calc(var(--section) * 0.6); }

.section-head {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: 1.5rem;
  align-items: end;
  margin-bottom: clamp(3rem, 2rem + 4vw, 6rem);
}
.section-head__label { grid-column: 1 / -1; }
.section-head__title { grid-column: 1 / -1; }
.section-head__aside { grid-column: 1 / -1; }

@media (min-width: 900px) {
  .section-head__label { grid-column: 1 / 4; align-self: start; padding-top: 0.6em; }
  .section-head__title { grid-column: 4 / 10; }
  .section-head__aside { grid-column: 10 / -1; justify-self: end; }
}

/* ---------- 5. Signature: architectural axis grid ---------- */
/* Faint column lines on the page background, aligned to the 12-col grid. */
.axis-lines {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--margin);
}
.axis-lines::before {
  content: "";
  position: absolute;
  inset: 0 var(--margin);
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0 1px,
    transparent 1px calc((100% + var(--gap)) / 4)
  );
  opacity: 0.55;
}
@media (min-width: 900px) {
  .axis-lines::before {
    background-image: repeating-linear-gradient(
      to right,
      var(--line) 0 1px,
      transparent 1px calc((100% + var(--gap)) / 6)
    );
  }
}

/* Axis bubble markers — the plan-drawing grid reference (X1, X2...). */
.axes {
  display: flex;
  justify-content: space-between;
  gap: var(--gap);
  margin-bottom: 1rem;
}
.axis {
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  aspect-ratio: 1;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-size: var(--fs-meta);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--stone);
  font-variant-numeric: tabular-nums;
}

/* Dimension line — e.g. "W 32,400" beside an image */
.dimension {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--fs-meta);
  color: var(--stone);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.12em;
}
.dimension::before,
.dimension::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-strong);
}
.dimension span { flex: none; }
.dimension--start::before { flex: 0 0 0.5rem; }

/* ---------- 6. Header & navigation ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease-out), transform 0.5s var(--ease-out);
}
/* Blur on a pseudo layer: backdrop-filter on the header itself would become the
   containing block for the fixed mobile menu and collapse it to header height. */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.site-header.is-hidden { transform: translateY(-100%); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--margin);
}

.logo { display: inline-flex; flex-direction: column; gap: 0.1rem; line-height: 1.2; }
.logo__mark {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.32em;
}
.logo__sub {
  font-family: var(--font-serif);
  font-size: var(--fs-meta);
  letter-spacing: 0.12em;
  color: var(--stone);
  white-space: nowrap;
  }
@media (max-width: 420px) { .logo__sub { letter-spacing: 0.06em; } }

.global-nav { display: none; }
.global-nav__list { display: flex; gap: clamp(1.25rem, 2.4vw, 2.75rem); }
.global-nav a {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  padding-block: 0.5rem;
  font-size: var(--fs-meta);
  letter-spacing: 0.16em;
  line-height: 1.3;
}
.global-nav .ja {
  font-family: var(--font-serif);
  color: var(--stone);
  letter-spacing: 0.12em;
}
.global-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.6s var(--ease-out);
}
.global-nav a:hover::after,
.global-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.75rem 0;
  border: 0;
  background: none;
  cursor: pointer;
  font-size: var(--fs-meta);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.menu-toggle__icon {
  position: relative;
  width: 1.75rem;
  height: 0.5rem;
}
.menu-toggle__icon::before,
.menu-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform 0.5s var(--ease-out), top 0.5s var(--ease-out);
}
.menu-toggle__icon::before { top: 0; }
.menu-toggle__icon::after { top: 100%; }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon::before { top: 50%; transform: rotate(18deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__icon::after { top: 50%; transform: rotate(-18deg); }

@media (min-width: 1024px) {
  .global-nav { display: block; }
  .menu-toggle { display: none; }
}

.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  padding: 2.5rem var(--margin) 2rem;
  background: var(--paper);
  overflow-y: auto;
  clip-path: inset(0 0 100% 0);
  visibility: hidden;
  transition: clip-path 0.8s var(--ease-inout), visibility 0s linear 0.8s;
}
.mobile-menu.is-open {
  clip-path: inset(0 0 0 0);
  visibility: visible;
  transition: clip-path 0.8s var(--ease-inout), visibility 0s;
}
.mobile-menu__list { display: flex; flex-direction: column; }
.mobile-menu__list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line);
}
.mobile-menu__list .ja {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 1rem + 3vw, 2.25rem);
  letter-spacing: 0.1em;
}
.mobile-menu__list .en { font-size: var(--fs-meta); letter-spacing: 0.18em; color: var(--stone); }
.mobile-menu__list a[aria-current="page"] .ja::before { content: "— "; color: var(--stone); }
.mobile-menu__foot { font-size: var(--fs-meta); color: var(--stone); }

@media (min-width: 1024px) { .mobile-menu { display: none; } }

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

/* ---------- 7. Buttons & links ---------- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding-block: 0.5rem;
  font-size: var(--fs-meta);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color 0.4s var(--ease-out), gap 0.5s var(--ease-out);
}
.link-arrow::after {
  content: "";
  width: 2.5rem;
  height: 1px;
  background: currentColor;
  transition: width 0.5s var(--ease-out);
}
.link-arrow:hover { border-color: var(--ink); }
.link-arrow:hover::after { width: 3.5rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 3.5rem;
  padding: 0 2rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-size: var(--fs-meta);
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: background-color 0.4s var(--ease-out), color 0.4s var(--ease-out);
}
.button:hover { background: transparent; color: var(--ink); }
.button[disabled] { opacity: 0.5; cursor: progress; }

/* ---------- 8. Media ---------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--surface);
}
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 16 / 9; }
.media--land { aspect-ratio: 4 / 3; }
.media--portrait { aspect-ratio: 4 / 5; }
.media--tall { aspect-ratio: 3 / 4; }
.media--pano { aspect-ratio: 21 / 9; }

.caption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  margin-top: 0.875rem;
  font-size: var(--fs-meta);
  color: var(--stone);
  letter-spacing: 0.08em;
}
.caption strong { font-family: var(--font-serif); font-weight: 500; color: var(--ink); }

/* ---------- 9. Breadcrumb ---------- */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.75rem;
  font-size: var(--fs-meta);
  color: var(--stone);
  letter-spacing: 0.1em;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 0.75rem; }
.breadcrumb li + li::before { content: "/"; color: var(--line-strong); }
.breadcrumb a { border-bottom: 1px solid transparent; transition: border-color 0.3s; }
.breadcrumb a:hover { border-bottom-color: currentColor; }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* ---------- 10. Page header (subpages) ---------- */
.page-head {
  padding-top: clamp(3rem, 2rem + 6vw, 8rem);
  padding-bottom: clamp(3rem, 2rem + 5vw, 7rem);
}
.page-head__grid { row-gap: 2rem; align-items: end; }
.page-head__crumb { grid-column: 1 / -1; margin-bottom: clamp(2rem, 1rem + 4vw, 5rem); }
.page-head__label { grid-column: 1 / -1; }
.page-head__title { grid-column: 1 / -1; }
.page-head__intro { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .page-head__label { grid-column: 1 / 4; align-self: start; padding-top: 1.2em; }
  .page-head__title { grid-column: 4 / 11; }
  .page-head__intro { grid-column: 7 / 12; margin-top: 2rem; }
}

/* ---------- 11. Home: Hero ---------- */
.hero { padding-top: clamp(1.5rem, 1rem + 2vw, 3rem); }
.hero__grid { row-gap: 2rem; }
.hero__meta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}
.hero__visual { grid-column: 1 / -1; }
.hero__visual .media { aspect-ratio: 4 / 5; }
.hero__copy {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.hero__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--fs-display);
  line-height: 1.35;
  letter-spacing: 0.12em;
}
.hero__title .line { display: block; overflow: hidden; }
.hero__title .line > span { display: inline-block; }
.hero__sub { font-family: var(--font-serif); color: var(--stone); letter-spacing: 0.12em; }

@media (min-width: 900px) {
  .hero__visual { grid-column: 1 / 10; }
  .hero__visual .media { aspect-ratio: 16 / 10; }
  .hero__copy {
    grid-column: 10 / -1;
    flex-direction: row-reverse;
    justify-content: space-between;
    align-items: flex-start;
    padding-top: 3.25rem;
  }
  .hero__title {
    writing-mode: vertical-rl;
    font-size: clamp(2.5rem, 1rem + 3.4vw, 5rem);
    line-height: 1.5;
    letter-spacing: 0.24em;
  }
  .hero__title .line { display: inline-block; }
  .hero__sub {
    writing-mode: vertical-rl;
    font-size: var(--fs-meta);
    letter-spacing: 0.3em;
  }
}

/* ---------- 12. Home: Statement ---------- */
.statement__grid { row-gap: 2.5rem; }
.statement__label { grid-column: 1 / -1; }
.statement__text { grid-column: 1 / -1; }
.statement__body { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .statement__label { grid-column: 1 / 3; padding-top: 0.75em; }
  .statement__text { grid-column: 3 / 11; }
  .statement__body { grid-column: 7 / 11; }
}
.statement__text {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 1rem + 2.2vw, 3rem);
  line-height: 1.85;
  letter-spacing: 0.1em;
  text-wrap: pretty;
}

/* ---------- 13. Home: Featured projects (asymmetric) ---------- */
.featured { row-gap: clamp(4rem, 3rem + 6vw, 10rem); }
.featured__item { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .featured__item:nth-child(1) { grid-column: 1 / 8; }
  .featured__item:nth-child(2) { grid-column: 9 / -1; margin-top: clamp(8rem, 18vw, 22rem); }
  .featured__item:nth-child(3) { grid-column: 3 / 11; }
  .featured__item:nth-child(4) { grid-column: 1 / 5; }
  .featured__item:nth-child(5) { grid-column: 7 / -1; margin-top: clamp(4rem, 10vw, 12rem); }
}

.project-link { display: block; }
.project-link .media img { transition: transform 1.6s var(--ease-out), filter 1.2s var(--ease-out); }
.project-link:hover .media img { transform: scale(1.035); }
.project-link__title {
  display: block;
  margin-top: 1.25rem;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  letter-spacing: 0.1em;
  line-height: 1.5;
}
.project-link__en { display: block; font-size: var(--fs-meta); color: var(--stone); letter-spacing: 0.16em; }

/* ---------- 14. Home: Services index ---------- */
.service-index { border-top: 1px solid var(--line); }
.service-index__item {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gap);
  row-gap: 0.75rem;
  padding-block: clamp(1.75rem, 1.2rem + 2vw, 3rem);
  border-bottom: 1px solid var(--line);
}
.service-index__en { grid-column: 1 / -1; }
.service-index__title { grid-column: 1 / -1; }
.service-index__text { grid-column: 1 / -1; color: var(--stone); }
@media (min-width: 900px) {
  .service-index__en { grid-column: 1 / 4; padding-top: 0.5em; }
  .service-index__title { grid-column: 4 / 8; }
  .service-index__text { grid-column: 8 / -1; }
}

/* ---------- 15. Journal list ---------- */
.journal-list { display: grid; gap: clamp(3rem, 2rem + 3vw, 5rem) var(--gap); }
@media (min-width: 720px) { .journal-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1100px) { .journal-list--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

.journal-card {
  container-type: inline-size;
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 3;
  row-gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-strong);
}
.journal-card__meta { display: flex; justify-content: space-between; gap: 1rem; }
.journal-card__title { font-family: var(--font-serif); font-size: var(--fs-h3); font-weight: 500; line-height: 1.6; letter-spacing: 0.06em; text-wrap: pretty; }
.journal-card__text { color: var(--stone); text-wrap: pretty; }

/* Journal page: featured entry */
.journal-feature { row-gap: 2rem; align-items: end; }
.journal-feature__media { grid-column: 1 / -1; }
.journal-feature__body { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 1.5rem; }
@media (min-width: 900px) {
  .journal-feature__media { grid-column: 1 / 8; }
  .journal-feature__body { grid-column: 9 / -1; }
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.625rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: var(--fs-meta);
  letter-spacing: 0.12em;
  color: var(--stone);
}

/* ---------- 16. CTA ---------- */
.cta { border-top: 1px solid var(--line); }
.cta__grid { row-gap: 2.5rem; align-items: end; }
.cta__title { grid-column: 1 / -1; }
.cta__action { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .cta__title { grid-column: 3 / 10; }
  .cta__action { grid-column: 10 / -1; justify-self: end; }
}
.cta__link {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: var(--fs-display);
  line-height: 1.3;
  letter-spacing: 0.1em;
  background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat;
  transition: background-size 0.9s var(--ease-out);
}
.cta__link:hover { background-size: 100% 1px; }

/* ---------- 17. Projects page: filter & grid ---------- */
.filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 1.25rem;
  border-block: 1px solid var(--line);
  margin-bottom: clamp(3rem, 2rem + 3vw, 5rem);
}
.filter__list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.filter__button {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.5rem 1.125rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  font-size: var(--fs-meta);
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background-color 0.35s var(--ease-out), color 0.35s var(--ease-out), border-color 0.35s;
}
.filter__button:hover { border-color: var(--ink); }
.filter__button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.filter__count { font-variant-numeric: tabular-nums; opacity: 0.6; }
.filter__status { font-size: var(--fs-meta); color: var(--stone); letter-spacing: 0.1em; font-variant-numeric: tabular-nums; }

.project-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(3.5rem, 2.5rem + 4vw, 7rem) var(--gap);
  align-items: end;
}
.project-card {
  grid-column: 1 / -1;
  min-width: 0;
  container-type: inline-size;
}
.project-card[hidden] { display: none; }
@media (min-width: 720px) {
  .project-card { grid-column: span 6; }
}
@media (min-width: 1100px) {
  .project-card { grid-column: span 4; }
  .project-card:nth-child(6n + 1) { grid-column: 1 / 8; }
  .project-card:nth-child(6n + 2) { grid-column: 9 / -1; }
  .project-card:nth-child(6n + 3) { grid-column: 1 / 5; }
  .project-card:nth-child(6n + 4) { grid-column: 5 / 9; }
  .project-card:nth-child(6n + 5) { grid-column: 9 / -1; }
  .project-card:nth-child(6n + 6) { grid-column: 3 / 11; }
  .project-grid.is-filtered .project-card { grid-column: span 4; }
}
.project-card .project-link { display: flex; flex-direction: column; }
.project-card__body {
  display: grid;
  gap: 0.25rem 1rem;
  padding-top: 1.25rem;
}
.project-card__title { font-family: var(--font-serif); font-size: var(--fs-h3); font-weight: 500; letter-spacing: 0.08em; line-height: 1.5; }
.project-card__meta { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; font-size: var(--fs-meta); color: var(--stone); letter-spacing: 0.1em; }

/* Container query: wide cards place meta to the right of the title */
@container (min-width: 560px) {
  .project-card__body { grid-template-columns: 1fr auto; align-items: baseline; }
  .project-card__meta { justify-content: flex-end; text-align: right; }
}
@container (min-width: 460px) {
  .journal-card__meta { font-size: var(--fs-meta); }
}

.empty-state { padding-block: 4rem; text-align: center; color: var(--stone); }

/* ---------- 18. Project detail ---------- */
.pd-hero .media { aspect-ratio: 4 / 5; }
@media (min-width: 900px) { .pd-hero .media { aspect-ratio: 21 / 10; } }

.pd-intro { row-gap: 3rem; }
.pd-facts { grid-column: 1 / -1; }
.pd-text { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .pd-facts { grid-column: 1 / 5; }
  .pd-text { grid-column: 6 / 12; }
}
.facts { display: grid; border-top: 1px solid var(--line); }
.facts > div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding-block: 0.875rem;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-meta);
}
.facts dt { color: var(--stone); letter-spacing: 0.12em; }
.facts dd { letter-spacing: 0.06em; }

.gallery { row-gap: var(--gap); }
.gallery__item { grid-column: 1 / -1; }
@media (min-width: 720px) {
  .gallery__item:nth-child(3n + 1) { grid-column: 1 / 9; }
  .gallery__item:nth-child(3n + 2) { grid-column: 9 / -1; align-self: end; }
  .gallery__item:nth-child(3n + 3) { grid-column: 3 / 11; }
}
.gallery__button {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: zoom-in;
  text-align: left;
}
.gallery__button .media img { transition: transform 1.4s var(--ease-out); }
.gallery__button:hover .media img { transform: scale(1.03); }

.lightbox {
  width: 100vw;
  max-width: none;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: color-mix(in srgb, var(--ink) 96%, transparent);
  color: var(--paper);
}
.lightbox::backdrop { background: transparent; }
.lightbox[open] { display: grid; grid-template-rows: auto 1fr auto; animation: lightbox-in 0.5s var(--ease-out); }
.lightbox__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem var(--margin);
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
}
.lightbox__stage { display: grid; place-items: center; min-height: 0; padding: 0 var(--margin); }
.lightbox__stage img { max-height: 100%; width: auto; object-fit: contain; }
.lightbox__nav {
  display: flex;
  justify-content: space-between;
  padding: 1rem var(--margin) 1.5rem;
}
.lightbox button {
  min-height: 2.75rem;
  padding: 0.5rem 0;
  border: 0;
  background: none;
  color: inherit;
  font-size: var(--fs-meta);
  letter-spacing: 0.18em;
  cursor: pointer;
}
.lightbox button:hover { text-decoration: underline; text-underline-offset: 6px; }
.lightbox :focus-visible { outline-color: var(--paper); }
@keyframes lightbox-in { from { opacity: 0; } to { opacity: 1; } }

.pd-next { border-top: 1px solid var(--line); }
.pd-next__link { display: grid; gap: 1rem; }
.pd-next__title { font-family: var(--font-serif); font-size: var(--fs-h1); line-height: 1.3; letter-spacing: 0.1em; }

/* ---------- 19. About ---------- */
.principles { display: grid; gap: clamp(3rem, 2rem + 3vw, 5rem) var(--gap); }
@media (min-width: 900px) { .principles { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.principle { display: flex; flex-direction: column; gap: 1.25rem; padding-top: 1.5rem; border-top: 1px solid var(--line-strong); }
.principle__kanji { font-family: var(--font-serif); font-size: clamp(3.5rem, 2rem + 5vw, 6.5rem); line-height: 1; letter-spacing: 0; }

.split { row-gap: 3rem; align-items: start; }
.split__media { grid-column: 1 / -1; }
.split__body { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .split__media { grid-column: 1 / 7; }
  .split__body { grid-column: 8 / 12; padding-top: clamp(2rem, 8vw, 10rem); }
  .split--reverse .split__media { grid-column: 7 / -1; grid-row: 1; }
  .split--reverse .split__body { grid-column: 2 / 6; grid-row: 1; }
}

.people { display: grid; gap: 0 var(--gap); border-top: 1px solid var(--line); }
@media (min-width: 720px) { .people { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1100px) { .people { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.person { display: flex; flex-direction: column; gap: 0.5rem; padding-block: 1.75rem; border-bottom: 1px solid var(--line); }
.person__name { font-family: var(--font-serif); font-size: var(--fs-h3); font-weight: 500; letter-spacing: 0.14em; }

.table-list { border-top: 1px solid var(--line); }
.table-list > div {
  display: grid;
  gap: 0.25rem 2rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--line);
}
@media (min-width: 720px) { .table-list > div { grid-template-columns: 12rem 1fr; } }
.table-list dt { color: var(--stone); letter-spacing: 0.12em; font-size: var(--fs-meta); padding-top: 0.15em; }

/* ---------- 20. Services ---------- */
.service-block { row-gap: 2rem; padding-block: clamp(3rem, 2rem + 4vw, 6rem); border-top: 1px solid var(--line); }
.service-block__head { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 0.75rem; }
.service-block__body { grid-column: 1 / -1; }
.service-block__list { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .service-block__head { grid-column: 1 / 5; }
  .service-block__body { grid-column: 6 / 10; }
  .service-block__list { grid-column: 10 / -1; }
}
.bullet-list li { padding-block: 0.5rem; border-bottom: 1px solid var(--line); font-size: var(--fs-meta); letter-spacing: 0.08em; }

.process { display: grid; gap: 0 var(--gap); counter-reset: step; }
@media (min-width: 900px) { .process { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
.process__step { display: flex; flex-direction: column; gap: 0.75rem; padding-block: 1.75rem; border-top: 1px solid var(--line-strong); }
.process__num { font-variant-numeric: tabular-nums; }
.process__title { font-family: var(--font-serif); font-size: var(--fs-h3); font-weight: 500; letter-spacing: 0.1em; }

/* ---------- 21. Contact ---------- */
.contact-grid { row-gap: 4rem; }
.contact-grid__form { grid-column: 1 / -1; }
.contact-grid__info { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 2.5rem; }
@media (min-width: 1024px) {
  .contact-grid__info { grid-column: 1 / 5; }
  .contact-grid__form { grid-column: 6 / -1; grid-row: 1; }
}

.form { display: grid; gap: 2rem; }
.form__row { display: grid; gap: 2rem; }
@media (min-width: 720px) { .form__row--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field__label { display: flex; align-items: baseline; gap: 0.75rem; font-size: var(--fs-meta); letter-spacing: 0.12em; }
.field__req { color: var(--stone); font-size: var(--fs-meta); }
.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 3.25rem;
  padding: 0.75rem 0;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  font-size: 1rem;
  transition: border-color 0.3s var(--ease-out);
  appearance: none;
}
.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 10px) 55%, calc(100% - 5px) 55%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
}
.field textarea { min-height: 10rem; resize: vertical; line-height: 1.8; }
.field input:focus,
.field select:focus,
.field textarea:focus { outline: none; border-bottom-color: var(--ink); }
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible { box-shadow: 0 1px 0 0 var(--ink); }
.field [aria-invalid="true"] { border-bottom-color: var(--ink); border-bottom-style: dashed; }
.field__error { min-height: 1.5em; font-size: var(--fs-meta); color: var(--ink); }
.field__error:not(:empty)::before { content: "※ "; }

.radio-group { display: flex; flex-wrap: wrap; gap: 0.5rem; border: 0; padding: 0; margin: 0; }
.radio-group legend { margin-bottom: 0.75rem; padding: 0; font-size: var(--fs-meta); letter-spacing: 0.12em; }
.radio-chip input { position: absolute; opacity: 0; pointer-events: none; }
.radio-chip span {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.5rem 1.125rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: var(--fs-meta);
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background-color 0.3s, color 0.3s;
}
.radio-chip input:checked + span { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.radio-chip input:focus-visible + span { outline: 1px solid var(--ink); outline-offset: 3px; }

.checkbox { display: flex; align-items: flex-start; gap: 0.75rem; font-size: var(--fs-meta); cursor: pointer; }
.checkbox input { width: 1.125rem; height: 1.125rem; margin-top: 0.3em; accent-color: var(--ink); }

.notice {
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  font-size: var(--fs-meta);
  line-height: 1.8;
}
.form-success { display: flex; flex-direction: column; gap: 1.5rem; padding: clamp(2rem, 4vw, 4rem); background: var(--surface); }
.form-success:focus { outline: none; }

/* ---------- 22. Footer ---------- */
.site-footer { padding-top: clamp(4rem, 3rem + 4vw, 8rem); padding-bottom: 2rem; background: var(--ink); color: var(--paper); }
.site-footer .label, .site-footer .muted { color: color-mix(in srgb, var(--paper) 62%, transparent); }
.site-footer__grid { row-gap: 3rem; }
.site-footer__brand { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 1rem; }
.site-footer__col { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 0.875rem; font-size: var(--fs-meta); }
@media (min-width: 720px) { .site-footer__col { grid-column: span 6; } }
@media (min-width: 1100px) {
  .site-footer__brand { grid-column: 1 / 5; }
  .site-footer__col { grid-column: span 2; }
  .site-footer__col:nth-of-type(1) { grid-column: 6 / 8; }
}
.site-footer__wordmark {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(1.5rem, 1rem + 2vw, 2.25rem);
  letter-spacing: 0.3em;
  line-height: 1.2;
}
.site-footer__nav a { display: inline-block; padding-block: 0.25rem; border-bottom: 1px solid transparent; transition: border-color 0.3s; }
.site-footer__nav a:hover { border-bottom-color: currentColor; }
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-top: clamp(4rem, 3rem + 4vw, 8rem);
  padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--paper) 18%, transparent);
  font-size: var(--fs-meta);
}
.site-footer__bottom p { max-width: 48em; }
.site-footer :focus-visible { outline-color: var(--paper); }

/* ---------- 23. 404 ---------- */
.not-found { min-height: calc(100dvh - var(--header-h)); display: grid; align-content: center; padding-block: 6rem; }
.not-found__grid { row-gap: 2.5rem; }
.not-found__code { grid-column: 1 / -1; font-family: var(--font-serif); font-size: clamp(6rem, 3rem + 14vw, 16rem); line-height: 1; letter-spacing: 0.04em; color: var(--surface); -webkit-text-stroke: 1px var(--line-strong); }
.not-found__body { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 2rem; align-items: flex-start; }
@media (min-width: 900px) {
  .not-found__code { grid-column: 1 / 7; }
  .not-found__body { grid-column: 8 / 12; }
}

/* ---------- 24. Motion ---------- */
/* Only hide when JS is available, so content never disappears without it. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(1.75rem);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
  transition-delay: var(--delay, 0s);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* Image shutter: reveals like a sliding panel.
   The clip lives on the <img>, not the observed container: an element clipped
   to zero area by its own clip-path never reports as intersecting. */
.js [data-reveal="media"] { opacity: 1; transform: none; }
.js [data-reveal="media"] img {
  clip-path: inset(100% 0 0 0);
  transform: scale(1.12);
  transition: clip-path 1.5s var(--ease-inout), transform 2.2s var(--ease-out);
  transition-delay: var(--delay, 0s);
}
.js [data-reveal="media"].is-visible img { clip-path: inset(0 0 0 0); transform: scale(1); }

/* Hero title: lines rise in sequence */
.js .hero__title .line > span { transform: translateY(105%); transition: transform 1.4s var(--ease-out); transition-delay: var(--delay, 0s); }
@media (min-width: 900px) {
  .js .hero__title .line > span { transform: translateX(-105%); }
}
.js .is-loaded .hero__title .line > span { transform: none; }

.js [data-reveal="line"] {
  opacity: 1;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.4s var(--ease-inout);
}
.js [data-reveal="line"].is-visible { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal],
  .js [data-reveal="media"],
  .js [data-reveal="media"] img,
  .js .hero__title .line > span { opacity: 1; transform: none; clip-path: none; }
}

/* View Transitions for same-origin page navigation (progressive enhancement) */
@view-transition { navigation: auto; }
::view-transition-old(root),
::view-transition-new(root) { animation-duration: 0.45s; animation-timing-function: var(--ease-out); }
@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
}

/* ---------- 25. Utilities ---------- */
.mt-s { margin-top: 1.5rem; }
.mt-m { margin-top: 3rem; }
.mt-l { margin-top: clamp(4rem, 3rem + 4vw, 8rem); }
.span-full { grid-column: 1 / -1; }

/* Responsive typography: preserve words, allow grid children to shrink. */
:where(main, section, article, figure, .grid) > * { min-width: 0; }
:where(h1, h2, h3) { line-break: strict; }
:where(p, li, dd, figcaption) { line-break: strict; }
:where(h1, h2, h3):lang(ja) { word-break: auto-phrase; overflow-wrap: anywhere; }
:where(p, figcaption):lang(ja) { text-wrap: pretty; }

.project-link .media { aspect-ratio: 4 / 3; }
.project-link__en { letter-spacing: 0.08em; line-height: 1.7; }
@media (max-width: 56.24rem) {
  .hero__visual .media, .pd-hero .media { aspect-ratio: 4 / 3; }
  .page-head__title { font-size: clamp(1.75rem, 6.8vw, 3rem); line-height: 1.5; }
  .section-head__title { font-size: clamp(1.5rem, 6.2vw, 2rem); }
}

:where(p, li, dd, figcaption):lang(ja) { word-break: auto-phrase; overflow-wrap: anywhere; }
@media (max-width: 56.24rem) {
  .hero__title { font-size: clamp(1.625rem, 8.2vw, 3.5rem); }
}