/* ============================================================
   Halde — Architecture Studio, Zürich
   Swiss International grid system
   Black / white with a single red accent (#E30613)
   ============================================================ */

:root {
  /* Color — disciplined: black, white, one red accent */
  --ink: #000000;
  --paper: #ffffff;
  --red: #e30613;

  /* Derived neutrals — tint of ink only, no new hues */
  --hair-soft: rgba(0, 0, 0, 0.14);
  --grid-line: rgba(0, 0, 0, 0.055);
  --wash: #f4f4f2;
  --muted: #5c5c5a;

  /* Type */
  --font-sans: "IBM Plex Sans", "Helvetica Neue", Helvetica, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Grid */
  --col: 12;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --maxw: 1440px;

  /* Motion — subtle */
  --ease: cubic-bezier(.2, 0, 0, 1);
  --fast: 120ms;
  --base: 200ms;
  --slow: 320ms;

  /* Hairlines */
  --hair: 1px solid var(--ink);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: var(--hair);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem var(--gutter);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.wordmark {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 1.05rem;
}

.accent-dot { color: var(--red); }

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.25rem);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav a {
  position: relative;
  padding-bottom: 2px;
  transition: color var(--fast) var(--ease);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--base) var(--ease);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after { transform: scaleX(1); }

.site-nav a:focus-visible {
  outline: 1px solid var(--red);
  outline-offset: 4px;
}

/* ============================================================
   Hero — oversized centered typographic
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3.5rem, 10vw, 7rem) var(--gutter) clamp(2.5rem, 6vw, 4rem);
  text-align: center;
}

/* Layered visual: faint graph-paper field behind the hero type */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.hero > * { position: relative; }

.hero-kicker {
  margin: 0 0 clamp(1.5rem, 4vw, 3rem);
  font-family: var(--font-mono);
  font-size: clamp(0.72rem, 1.4vw, 0.85rem);
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(3.5rem, 17vw, 15rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}

.hero-tagline {
  margin: clamp(1.5rem, 4vw, 3rem) auto 0;
  max-width: 34ch;
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  font-weight: 400;
}

.hero-rule {
  width: 3rem;
  height: 3px;
  background: var(--red);
  margin: clamp(2rem, 5vw, 3.5rem) auto 0;
}

/* ============================================================
   Drawing strip — edge-to-edge, four thin-line drawings
   ============================================================ */
.drawing-strip {
  border-top: var(--hair);
  border-bottom: var(--hair);
}

.strip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.drawing {
  margin: 0;
  padding: clamp(1.25rem, 3vw, 2.5rem);
  border-right: var(--hair);
}

.drawing:last-child { border-right: none; }

.drawing-svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- Drafting line hierarchy (shared by strip + sheets) ---- */
.l-cut   { fill: none; stroke: var(--ink); stroke-width: 2.4; stroke-linecap: square; stroke-linejoin: miter; }
.l-vis   { fill: none; stroke: var(--ink); stroke-width: 1.1; }
.l-thin  { fill: none; stroke: var(--ink); stroke-width: 0.6; }
.l-dim   { fill: none; stroke: var(--red); stroke-width: 0.7; }
.l-leader{ fill: none; stroke: var(--red); stroke-width: 0.7; }
.a-red   { fill: var(--red); font-family: var(--font-mono); font-size: 9px; letter-spacing: .04em; }
.a-ink   { fill: var(--ink); font-family: var(--font-mono); font-size: 9px; letter-spacing: .04em; }
.a-room  { fill: var(--muted); font-family: var(--font-mono); font-size: 8px; letter-spacing: .12em; text-transform: uppercase; }
.hatch-fill { fill: url(#hatch); stroke: none; }
.grain-fill  { fill: url(#grain); }

.drawing-label {
  margin-top: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.label-name { font-weight: 500; }
.label-year { color: var(--red); }

/* ============================================================
   Sections
   ============================================================ */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 6.5rem) var(--gutter);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: var(--hair);
  padding-bottom: 0.75rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-title {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--red);
}

/* ============================================================
   Selected projects
   ============================================================ */
.project-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.project-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: clamp(1.25rem, 3vw, 2rem) 0;
  border-bottom: var(--hair);
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.project-name {
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  font-weight: 600;
}

.project-loc {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.project-detail {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  text-align: right;
}

.project-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--red);
}

.project-line {
  font-size: 0.95rem;
  max-width: 40ch;
  margin-left: auto;
}

/* ============================================================
   Studio
   ============================================================ */
.studio-statement {
  max-width: 62ch;
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  line-height: 1.5;
  margin: 0 0 clamp(2.5rem, 6vw, 4rem);
}

.studio-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: var(--hair);
}

.fact {
  padding: 1.25rem 1rem 1.25rem 0;
  border-right: var(--hair);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.fact:last-child { border-right: none; }

.fact-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-value {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 600;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.contact-block {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.contact-link {
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--red);
  text-underline-offset: 4px;
  transition: color var(--fast) var(--ease);
}

.contact-link:hover { color: var(--red); }

.contact-address {
  font-style: normal;
  font-size: 1rem;
  line-height: 1.6;
}

.contact-note {
  margin: 0;
  font-size: 0.95rem;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: var(--hair);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem var(--gutter);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ============================================================
   Scroll reveal (progressive enhancement)
   Hidden state only applies when JS is confirmed running (.js),
   so content is never invisible if scripts fail to load.
   ============================================================ */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 860px) {
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .drawing:nth-child(2) { border-right: none; }
  .drawing:nth-child(n+3) { border-top: var(--hair); }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }

  /* filter bar reflows: search + clear on one row, chips full width below */
  .filter-bar {
    grid-template-columns: minmax(0, 1fr) auto;
    row-gap: 1.25rem;
  }
  .filter-search { grid-column: 1; }
  .chip-groups { grid-column: 1 / -1; order: 3; }
  .filter-bar > .chip-clear { grid-column: 2; justify-self: end; }
}

@media (max-width: 600px) {
  .strip-grid { grid-template-columns: 1fr; }
  .drawing { border-right: none; border-bottom: var(--hair); }
  .drawing:last-child { border-bottom: none; }
}

/* narrow-screen overrides for components defined later in this file
   live at the very end, so source order keeps them winning. */

/* ============================================================
   Shared bits: buttons, tags, sr-only, skip link, mobile menu
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 0.75rem; top: -3rem;
  z-index: 60;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: top var(--fast) var(--ease);
}

.skip-link:focus-visible { top: 0.75rem; }

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.8rem 1.4rem;
  border: var(--hair);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease),
              border-color var(--fast) var(--ease);
}

.btn-red { background: var(--red); border-color: var(--red); color: var(--paper); }
.btn-red:hover { background: var(--ink); border-color: var(--ink); }

.btn-ghost:hover { background: var(--ink); color: var(--paper); }

.btn:focus-visible,
.chip:focus-visible,
.vt-btn:focus-visible,
.card-open:focus-visible,
.project-open:focus-visible,
.link-btn:focus-visible,
.menu-btn:focus-visible,
.cs-close:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--hair-soft);
  padding: 0.15rem 0.5rem;
  margin-right: 0.35rem;
  color: var(--muted);
}

.link-btn {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.section-lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  line-height: 1.55;
  margin: 0 0 clamp(2rem, 4vw, 3rem);
  color: var(--muted);
}

/* ---- mobile menu button (hidden on desktop) ---- */
.menu-btn {
  display: none;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 0;
  padding: 0.25rem 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
}

.menu-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 22px; height: 16px;
}

.menu-line {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--ink);
  transition: transform var(--base) var(--ease);
}

.menu-btn[aria-expanded="true"] .menu-line:first-child { transform: translateY(3.25px) rotate(45deg); }
.menu-btn[aria-expanded="true"] .menu-line:last-child { transform: translateY(-3.25px) rotate(-45deg); }

/* ============================================================
   Project index — filter bar
   ============================================================ */
.filter-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: end;
  gap: 1.25rem 2rem;
  border-top: var(--hair);
  border-bottom: var(--hair);
  padding: 1.25rem 0;
  margin-bottom: 1.5rem;
}

.filter-search { position: relative; }

.search-input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  padding: 0.6rem 0.6rem 0.6rem 1.9rem;
  border: var(--hair);
  background: var(--paper);
  color: var(--ink);
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

.search-input::-webkit-search-cancel-button { -webkit-appearance: none; }

.search-input:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

.filter-search::before {
  content: "";
  position: absolute;
  left: 0.65rem;
  top: 50%;
  width: 11px; height: 11px;
  transform: translateY(-60%);
  border: 1.5px solid var(--muted);
  border-radius: 50%;
  pointer-events: none;
}

.filter-search::after {
  content: "";
  position: absolute;
  left: calc(0.65rem + 10px);
  top: calc(50% + 3px);
  width: 6px; height: 1.5px;
  background: var(--muted);
  transform: rotate(45deg);
  pointer-events: none;
}

.chip-groups {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  min-width: 0;
}

.chip-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}

.chip-group-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.chip-row { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--hair-soft);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease),
              border-color var(--fast) var(--ease);
}

.chip:hover { border-color: var(--ink); }

.chip[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.chip-clear { border-style: dashed; color: var(--muted); }
.chip-clear:hover { color: var(--red); border-color: var(--red); }

.result-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.75rem;
}

.empty-state {
  border: 1px dashed var(--hair-soft);
  padding: clamp(2rem, 6vw, 4rem);
  text-align: center;
}

.empty-big {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.empty-small { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* ============================================================
   Project cards — drafting-sheet thumbnails
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.card {
  border: var(--hair);
  background: var(--paper);
  display: flex;
  flex-direction: column;
  transition: border-color var(--base) var(--ease);
}

.card:hover { border-color: var(--red); }

.card-sheet {
  position: relative;
  overflow: hidden;
  border-bottom: var(--hair);
  /* graph-paper depth */
  background-color: var(--wash);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 14px 14px;
}

.sheet-svg { display: block; width: 100%; height: auto; }

.sheet-titleblock {
  position: absolute;
  left: 0; bottom: 0;
  display: flex;
  align-items: stretch;
  border-top: var(--hair);
  border-right: var(--hair);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.stb-num {
  padding: 0.3rem 0.45rem;
  background: var(--ink);
  color: var(--paper);
}

.stb-name { padding: 0.3rem 0.5rem; }

.view-toggle {
  display: inline-flex;
  border: var(--hair);
  background: var(--paper);
}

.vt-btn {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border: 0;
  border-right: var(--hair);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}

.vt-btn:last-child { border-right: 0; }
.vt-btn:hover { color: var(--ink); }

.vt-btn.is-on,
.vt-btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.card .view-toggle {
  position: absolute;
  top: 0.6rem; right: 0.6rem;
  z-index: 2;
}

.card-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.3rem;
  padding: 2.6rem 0.9rem 2.2rem;
  background: rgba(255, 255, 255, 0.92);
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity var(--base) var(--ease), transform var(--base) var(--ease);
}

.card:hover .card-overlay,
.card:focus-within .card-overlay {
  opacity: 1;
  transform: none;
}

.ov-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--hair-soft);
  padding-bottom: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.ov-k { color: var(--muted); }
.ov-v { font-weight: 500; }

.card-meta { padding: 1.1rem 1.1rem 0.4rem; }

.card-name { margin: 0 0 0.4rem; font-size: 1.2rem; font-weight: 600; }

.card-open {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  text-align: left;
  cursor: pointer;
  transition: color var(--fast) var(--ease);
}

.card-open:hover { color: var(--red); }

.card-line {
  margin: 0 0 0.8rem;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--muted);
}

.card-tags { margin: 0; }

.card-cta {
  margin-top: auto;
  border-top: var(--hair);
  padding: 0.8rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
}

.cta-arrow { color: var(--red); transition: transform var(--base) var(--ease); }
.card:hover .cta-arrow { transform: translateX(4px); }

@media (prefers-reduced-motion: reduce) {
  .card:hover .cta-arrow { transform: none; }
  .card-overlay { transition: none; }
}

/* ============================================================
   Studio — principals, affiliations
   ============================================================ */
.studio-body {
  max-width: 62ch;
  margin: 0 0 clamp(2.5rem, 5vw, 3.5rem);
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.6;
}

.principals {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  border-top: var(--hair);
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.principal {
  display: grid;
  grid-template-columns: 88px 1fr;
  grid-template-rows: auto auto auto;
  column-gap: 1.25rem;
  align-items: start;
}

.portrait-svg {
  grid-row: 1 / span 3;
  width: 88px;
  height: auto;
  border: var(--hair);
  background: var(--wash);
}

.principal-name {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
}

.principal-role {
  margin: 0.15rem 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--red);
}

.principal-bio {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--muted);
  max-width: 46ch;
}

.affiliations {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: var(--hair);
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.25rem;
}

.affiliations-list {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ============================================================
   Approach — method list, services, timeline strip
   ============================================================ */
.method-list {
  list-style: none;
  margin: 0 0 clamp(3rem, 7vw, 4.5rem);
  padding: 0;
  border-top: var(--hair);
}

.method-step {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 0 1.5rem;
  padding: 1.4rem 0;
  border-bottom: var(--hair);
}

.method-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--red);
  padding-top: 0.2rem;
}

.method-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.method-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--muted);
  max-width: 58ch;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem clamp(2rem, 5vw, 4rem);
  margin-bottom: clamp(3rem, 7vw, 4.5rem);
}

.service {
  border-top: var(--hair);
  padding-top: 1rem;
}

.service p {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--muted);
  max-width: 44ch;
}

.timeline-strip {
  border-top: var(--hair);
  border-bottom: var(--hair);
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.tl-item {
  padding: 1rem 0.9rem 1rem 0;
  border-right: var(--hair);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.tl-item:last-child { border-right: none; }

.tl-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--red);
}

.tl-event {
  font-size: 0.85rem;
  line-height: 1.45;
}

/* ============================================================
   Inquiry form
   ============================================================ */
.demo-note {
  max-width: 62ch;
  margin: 0 0 clamp(2rem, 4vw, 3rem);
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--red);
  background: var(--wash);
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--muted);
}

.iq-form { max-width: 720px; }

.iq-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  border-top: var(--hair);
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
}

.iq-field { display: flex; flex-direction: column; gap: 0.35rem; }

.iq-field:nth-child(5),      /* programme textarea */
.iq-field:nth-child(8) {     /* description textarea */
  grid-column: 1 / -1;
}

.iq-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.iq-req { color: var(--red); }

.iq-hint {
  margin: 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.iq-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.98rem;
  padding: 0.6rem 0.7rem;
  border: var(--hair);
  background: var(--paper);
  color: var(--ink);
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

select.iq-input {
  background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%),
                    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 14px) 55%, calc(100% - 9px) 55%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 2rem;
}

textarea.iq-input { resize: vertical; min-height: 5.5rem; }

.iq-input:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

.iq-input.is-invalid,
.iq-input[aria-invalid="true"] {
  border-color: var(--red);
  box-shadow: inset 3px 0 0 var(--red);
}

.iq-error {
  margin: 0;
  font-size: 0.8rem;
  color: var(--red);
}

.iq-summary {
  margin-top: 1.5rem;
  border: 1px solid var(--red);
  padding: 1rem 1.25rem;
  background: var(--wash);
}

.iq-summary:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

.iq-sum-title {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--red);
}

.iq-sum-list { margin: 0; padding-left: 1.2rem; }

.iq-sum-list li { margin: 0.2rem 0; font-size: 0.9rem; }

.iq-sum-list a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.iq-sum-list a:hover { color: var(--red); }

.iq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.iq-status {
  margin: 1rem 0 0;
  min-height: 1.4em;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.iq-draft-notice {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ============================================================
   Case-study dialog
   ============================================================ */
html.dlg-open { overflow: hidden; }

.cs-dialog {
  width: min(920px, calc(100vw - 2 * var(--gutter)));
  max-height: min(88vh, 100%);
  padding: 0;
  border: var(--hair);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
}

/* backdrop — flat scrim, no blur/shadow theatrics */
.cs-dialog::backdrop { background: rgba(0, 0, 0, 0.55); }

.cs-bar {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 3vw, 1.75rem);
  background: var(--paper);
  border-bottom: var(--hair);
}

.cs-bar-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.cs-close {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: none;
  border: var(--hair);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  color: var(--ink);
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}

.cs-close:hover { background: var(--ink); color: var(--paper); }

.cs-body {
  overflow-y: auto;
  padding: clamp(1.25rem, 3.5vw, 2.25rem);
  outline: none;
}

/* ---- header strip ---- */
.cs-head { border-bottom: var(--hair); padding-bottom: 1.25rem; margin-bottom: 1.75rem; }

.cs-meta { margin: 0 0 0.75rem; }

.cs-name {
  margin: 0;
  font-size: clamp(1.7rem, 4.5vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.12;
}

.cs-loc {
  margin: 0.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---- hero plate ---- */
.cs-plate { margin: 0 0 clamp(2rem, 5vw, 3rem); }

.cs-sheet {
  position: relative;
  border: var(--hair);
  background-color: var(--wash);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 20px 20px;
}

.cs-sheet svg { display: block; width: 100%; height: auto; }

.cs-view-toggle {
  position: absolute;
  top: 0.75rem; right: 0.75rem;
  z-index: 2;
}

.cs-cap {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---- blocks ---- */
.cs-block {
  border-top: var(--hair);
  padding-top: 1.5rem;
  margin: 0 0 1.75rem;
}

.cs-block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.cs-block-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.cs-block-idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--red);
}

.cs-prose p {
  margin: 0;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.65;
}

.cs-list {
  margin: 0;
  padding-left: 1.2rem;
  max-width: 68ch;
}

.cs-list li { margin: 0.45rem 0; font-size: 0.95rem; line-height: 1.55; }
.cs-list li::marker { color: var(--red); }

/* ---- materials table ---- */
.cs-tablewrap { overflow-x: auto; }

.cs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.cs-table th,
.cs-table td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 1rem 0.7rem 0;
  border-bottom: var(--hair);
}

.cs-table thead th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--ink);
}

.cs-mat-name { font-weight: 600; width: 40%; }

.cs-table td { color: var(--muted); line-height: 1.5; }

/* ---- facts / credits dl grids ---- */
.cs-facts,
.cs-credits {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
}

.cs-facts dt, .cs-facts dd,
.cs-credits dt, .cs-credits dd {
  padding: 0.65rem 0.75rem 0.65rem 0;
  border-bottom: var(--hair);
  margin: 0;
}

.cs-facts dt, .cs-credits dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.cs-facts dd, .cs-credits dd {
  font-size: 0.95rem;
  font-weight: 500;
  text-align: right;
}

/* ---- footer CTA ---- */
.cs-foot {
  border-top: var(--hair);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-start;
}

.cs-hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--muted);
}

@media (max-width: 600px) {
  .cs-facts, .cs-credits { grid-template-columns: 1fr; }
  .cs-facts dd, .cs-credits dd { text-align: left; border-bottom: none; padding-top: 0; }
  .cs-mat-name { width: auto; }
}

/* ============================================================
   Mobile navigation panel
   ============================================================ */
@media (max-width: 860px) {
  .menu-btn { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 40;
    flex-direction: column;
    justify-content: center;
    gap: 1.75rem;
    padding: 2rem var(--gutter);
    background: var(--paper);
    font-size: 1.1rem;
    transform: translateY(-100%);
    visibility: hidden;
    transition: transform var(--slow) var(--ease), visibility 0s linear var(--slow);
  }

  .site-nav.is-open {
    transform: none;
    visibility: visible;
    transition: transform var(--slow) var(--ease);
  }

  html.menu-open { overflow: hidden; }

  /* keep the menu button clickable above the panel */
  .menu-btn { position: relative; z-index: 50; }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav { transition: none; }
}

/* ---- active nav link ---- */
.site-nav a.is-active { color: var(--red); }
.site-nav a.is-active::after { transform: scaleX(1); }

/* ---- selected-project open button reset ---- */
.project-open {
  font: inherit;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  text-align: right;
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--hair-soft);
  text-underline-offset: 3px;
  transition: color var(--fast) var(--ease), text-decoration-color var(--fast) var(--ease);
}

.project-open:hover {
  color: var(--red);
  text-decoration-color: var(--red);
}

@media (max-width: 600px) {
  .project-open { text-align: left; }
}

/* ============================================================
   Narrow-screen overrides — MUST stay at the end of the file.
   These target selectors (.principal, .method-step, .iq-fields,
   etc.) whose base rules appear earlier in this stylesheet;
   equal specificity means source order decides, so keeping
   this block last guarantees the mobile layout wins.
   ============================================================ */
@media (max-width: 600px) {
  /* hero type may wrap instead of forcing nowrap overflow */
  .hero-title { white-space: normal; }

  /* selected-projects rows collapse to one column */
  .project-item { grid-template-columns: 1fr; }
  .project-detail { text-align: left; }
  .project-line { margin-left: 0; }

  /* studio facts stack */
  .studio-facts { grid-template-columns: 1fr; }
  .fact { border-right: none; border-bottom: var(--hair); padding: 1rem 0; }
  .fact:last-child { border-bottom: none; }

  /* method steps: number + title row, text below */
  .method-step { grid-template-columns: 3rem minmax(0, 1fr); }
  .method-text { grid-column: 2; margin-top: 0.4rem; }

  /* timeline strip reflows to two columns */
  .timeline-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tl-item { border-bottom: var(--hair); }
  .tl-item:nth-child(2n) { border-right: none; }
  .tl-item:nth-last-child(-n+2) { border-bottom: none; }

  /* principals stack above the narrow breakpoint */
  .principals { grid-template-columns: minmax(0, 1fr); }

  /* principal inner grid must not overflow: portrait column shrinks,
     text column is a true min-0 track so bio wraps inside it */
  .principal { grid-template-columns: 72px minmax(0, 1fr); }
  .portrait-svg { width: 72px; }
  .principal-bio { max-width: none; }

  /* inquiry fields single column */
  .iq-fields { grid-template-columns: minmax(0, 1fr); }
}