/* ============================================================
   Mesa Studio - editorial architecture journal
   Palette: limestone paper, charcoal ink, restrained muted olive.
   Type: Fraunces (display serif) + Archivo (UI sans).
   ============================================================ */

:root {
  --paper: #EDE6DA;
  --paper-deep: #E5DCCB;
  --ink: #26241F;
  --ink-soft: #2E2C27;
  --accent: #6B6B46;
  --accent-ink: #4F4F33;
  --accent-tint: #D8D6C4;
  --paper-bright: #F5EFE4;
  --line: rgba(38, 36, 31, 0.18);
  --font-sans: 'Archivo', system-ui, sans-serif;
  --font-serif: 'Fraunces', Georgia, serif;
  --pad: clamp(1.25rem, 4vw, 4rem);
  --max: 1400px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

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

/* Filter fix: author display rules (e.g. .study-card { display:block })
   override the UA [hidden] rule, so enforce hiding here with !important.
   This is the selector the filter JS applies via el.hidden = true/false. */
[hidden] { display: none !important; }

a { color: var(--accent-ink); }

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--paper-bright);
  padding: 0.7rem 1.1rem;
  z-index: 100;
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: top 0.2s ease;
}

.skip-link:focus { top: 1rem; }

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

/* ---------- site-wide honesty notice ---------- */

.notice {
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.notice-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.5rem var(--pad);
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  z-index: 50;
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem var(--pad);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.wordmark {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.site-nav { display: flex; gap: 1.3rem; }

.site-nav a {
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  white-space: nowrap;
}

.site-nav a:hover { color: var(--accent-ink); }

/* ---------- layout helpers ---------- */

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(1rem, 2.5vw, 2.5rem);
  row-gap: 2rem;
}

.section-pad { padding: 5.5rem 0; }

.folio {
  grid-column: 1 / 3;
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(4.2rem, 8.5vw, 7.6rem);
  line-height: 0.85;
  color: var(--accent);
  opacity: 0.9;
}

.section-head { grid-column: 3 / 13; align-self: end; }

.section-label {
  margin: 0 0 0.6rem;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-ink);
  font-weight: 500;
}

.section-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.9rem, 3.6vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
}

.rule {
  grid-column: 1 / 13;
  height: 1px;
  background: var(--line);
  margin: 2.4rem 0 0;
}

.caption {
  margin: 0.6rem 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* ---------- hero ---------- */

.hero { padding: clamp(2.5rem, 6vh, 4.5rem) 0 4.5rem; }

.hero-copy { grid-column: 1 / 6; align-self: center; }

.hero-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(3.1rem, 7.4vw, 6.4rem);
  line-height: 1.0;
  letter-spacing: -0.015em;
}

.hero-sub {
  margin: 1.6rem 0 0;
  max-width: 34ch;
  font-size: clamp(1.05rem, 1.4vw, 1.22rem);
  color: var(--ink-soft);
}

.hero-note {
  margin: 1.4rem 0 0;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  font-weight: 500;
}

.hero-link {
  display: inline-block;
  margin-top: 2.1rem;
  padding: 0.85rem 1.5rem;
  background: var(--accent-ink);
  border: 1px solid var(--accent-ink);
  color: var(--paper-bright);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.hero-link:hover { background: var(--accent); border-color: var(--accent); }
.hero-link:active { transform: scale(0.98); }

.hero-media { grid-column: 7 / 13; }

.hero-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

/* ---------- introduction ---------- */

.lead {
  grid-column: 4 / 9;
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  line-height: 1.45;
}

.prose { grid-column: 9 / 13; }

.prose p { margin: 0 0 1.15rem; color: var(--ink-soft); }
.prose p:last-child { margin-bottom: 0; }

/* ---------- studies: filters + grid ---------- */

.filter-bar {
  grid-column: 1 / 13;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.9rem;
  border-bottom: 1px solid var(--line);
}

.filter-group { display: flex; flex-wrap: wrap; gap: 0.55rem; }

.filter-btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.62rem 1.05rem;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.filter-btn:hover { background: var(--paper-deep); }
.filter-btn:active { transform: scale(0.98); }
.filter-btn[aria-pressed='true'] { background: var(--ink); color: var(--paper-bright); }

.studies-status {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.studies-grid {
  grid-column: 1 / 13;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 3rem clamp(1rem, 2.5vw, 2.5rem);
}

.study-card {
  grid-column: 1 / 13;
  display: block;
  color: var(--ink);
  text-decoration: none;
}

.study-media { overflow: hidden; background: var(--paper-deep); }

.study-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.study-card:hover .study-media img { transform: scale(1.04); }

.study-index {
  display: block;
  margin: 1.05rem 0 0.3rem;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--accent-ink);
}

.study-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.45rem, 2.3vw, 2rem);
  line-height: 1.12;
}

.study-meta {
  display: block;
  margin: 0.45rem 0 0;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.empty-state {
  grid-column: 1 / 13;
  padding: 3rem 2rem;
  background: var(--accent-tint);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
}

.empty-state p {
  margin: 0;
  max-width: 36ch;
  font-family: var(--font-serif);
  font-size: 1.45rem;
  line-height: 1.35;
}

.empty-state .filter-btn {
  border-color: var(--accent-ink);
  color: var(--accent-ink);
  margin: 0 0 1.3rem;
}
.empty-state .filter-btn:hover { background: var(--accent-ink); color: var(--paper-bright); }

/* ---------- about ---------- */

.about-copy { grid-column: 3 / 7; }

.about-copy p { margin: 0 0 1.1rem; color: var(--ink-soft); }
.about-copy p:last-child { margin-bottom: 0; }

.about-media { grid-column: 8 / 13; }

.about-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.4rem var(--pad) 2rem;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 2rem;
}

.footer-brand { grid-column: 1 / 4; }
.footer-studies { grid-column: 5 / 8; }
.footer-contact { grid-column: 9 / 13; }

.footer-brand .wordmark { font-size: 1.25rem; }

.footer-h {
  margin: 0 0 0.9rem;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-ink);
  font-weight: 500;
}

.footer-inner p {
  margin: 0 0 0.8rem;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.footer-studies a {
  display: block;
  margin: 0 0 0.55rem;
  font-size: 14.5px;
  color: var(--ink);
  text-decoration: none;
}

.footer-studies a:hover { color: var(--accent-ink); }

.contact-mail {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink);
}

.contact-note {
  display: block;
  font-size: 12.5px;
  color: var(--ink-soft);
  letter-spacing: 0.03em;
}

.footer-credit {
  grid-column: 1 / 13;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.6rem;
  margin-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--ink-soft);
}

/* ---------- project pages ---------- */

.project-hero { padding-top: clamp(2rem, 4vh, 3rem); }

.back-link {
  grid-column: 1 / 13;
  margin-bottom: 0.4rem;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--accent-ink);
}

.back-link:hover { text-decoration: underline; }

.project-hero-media { grid-column: 1 / 13; margin: 1.2rem 0 0; }

.project-hero-media img { width: 100%; aspect-ratio: 16 / 8.2; object-fit: cover; }

.project-title-block { grid-column: 3 / 11; padding: 2.4rem 0 1.2rem; }

.project-cat {
  margin: 0 0 0.7rem;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-ink);
  font-weight: 500;
}

.project-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.5rem, 6vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.project-sub {
  margin: 1.2rem 0 0;
  max-width: 52ch;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.12rem, 1.8vw, 1.38rem);
  line-height: 1.4;
  color: var(--ink-soft);
}

.story-copy { grid-column: 4 / 9; }

.story-copy p { margin: 0 0 1.3rem; color: var(--ink-soft); }
.story-copy p:last-child { margin-bottom: 0; }

.story-copy p:first-child::first-letter {
  float: left;
  padding-right: 0.14em;
  font-family: var(--font-serif);
  font-size: 3.5em;
  line-height: 0.8;
  color: var(--accent-ink);
}

.brief-panel {
  grid-column: 10 / 13;
  align-self: start;
  padding: 1.5rem 1.4rem 1.7rem;
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  background: var(--paper-bright);
}

.brief-panel h2 {
  margin: 0 0 0.9rem;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-ink);
  font-weight: 500;
}

.brief-panel dl { margin: 0; }

.brief-panel dt {
  margin-top: 0.95rem;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.brief-panel dt:first-of-type { margin-top: 0; }

.brief-panel dd { margin: 0.2rem 0 0; font-size: 15px; line-height: 1.45; }

/* ---------- pager (previous / next) ---------- */

.pager { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.pager-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.6rem var(--pad);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.pager-prev,
.pager-next {
  display: block;
  color: var(--ink);
  text-decoration: none;
}

.pager-prev:focus-visible,
.pager-next:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.pager-label {
  margin: 0 0 0.5rem;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-ink);
  font-weight: 500;
}

.pager-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.4vw, 1.9rem);
  line-height: 1.12;
  transition: color 0.2s ease;
}

.pager-next { text-align: right; }

.pager a:hover .pager-title { color: var(--accent-ink); }

/* ---------- responsive ---------- */

@media (min-width: 900px) {
  .study-card:nth-child(1) { grid-column: 1 / 8; }
  .study-card:nth-child(2) { grid-column: 9 / 13; margin-top: 4rem; }
  .study-card:nth-child(3) { grid-column: 1 / 6; }
  .study-card:nth-child(4) { grid-column: 8 / 13; margin-top: 3rem; }
}

@media (max-width: 899px) {
  .hero-copy { grid-column: 1 / 13; }
  .hero-media { grid-column: 1 / 13; }
  .lead { grid-column: 1 / 13; }
  .prose { grid-column: 1 / 13; }
  .about-copy { grid-column: 1 / 13; }
  .about-media { grid-column: 1 / 13; }
  .folio { grid-column: 1 / 13; }
  .section-head { grid-column: 1 / 13; }
  .story-copy { grid-column: 1 / 13; }
  .brief-panel { grid-column: 1 / 13; }
  .footer-brand,
  .footer-studies,
  .footer-contact { grid-column: 1 / 13; }
  .project-title-block { grid-column: 1 / 13; }
}

@media (max-width: 639px) {
  body { font-size: 16px; }
  .header-inner { padding-top: 0.7rem; padding-bottom: 0.7rem; }
  .wordmark { font-size: 1.3rem; }
  .site-nav { gap: 0.95rem; }
  .site-nav a { font-size: 11.5px; }
  .project-hero-media img { aspect-ratio: 4 / 3; }
  .pager-inner { grid-template-columns: 1fr; gap: 1.8rem; }
  .pager-next { text-align: left; }
  .section-pad { padding: 4rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}