/* ─── Tokens ─────────────────────────────────────────────────── */
:root {
  --bg:        #F8F7F4;
  --surface:   #FFFFFF;
  --border:    #E8E6E0;
  --text:      #1A1A18;
  --muted:     #7A7870;
  --accent:    #1A1A18;
  --tag-bg:    #EDECEA;
  --tag-text:  #5A5850;
  --radius:    6px;
  --gap:       clamp(1rem, 2.5vw, 2rem);
  --max-w:     1100px;
  --font:      'Inter', system-ui, sans-serif;
  --mono:      'JetBrains Mono', monospace;
}

/* ─── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ─── Layout ─────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gap);
}

/* ─── Site header ────────────────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem var(--gap);
  max-width: var(--max-w);
  margin: 0 auto;
}

.site-header .logo {
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.lang-toggle {
  display: flex;
  gap: .25rem;
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .04em;
}
.lang-toggle a {
  color: var(--muted);
  transition: color .15s;
}
.lang-toggle a.active,
.lang-toggle a:hover { color: var(--text); }
.lang-toggle span { color: var(--border); }

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
  padding: 4rem var(--gap) 3rem;
  max-width: var(--max-w);
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.hero-label {
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 1.25rem;
}

.hero-bio {
  font-size: 1rem;
  color: var(--muted);
  max-width: 480px;
  line-height: 1.7;
}

/* ─── Filter bar ─────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  padding: 2rem var(--gap) 1.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.filter-btn {
  font-family: var(--font);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .04em;
  padding: .4rem .9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all .15s;
}
.filter-btn:hover { border-color: var(--text); color: var(--text); }
.filter-btn.active { background: var(--text); color: var(--bg); border-color: var(--text); }

/* ─── Project grid ───────────────────────────────────────────── */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--gap);
  padding: 0 var(--gap) 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ─── Project card ───────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,.07);
}

.card-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--tag-bg);
}

.card-image-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #E8E6E0 0%, #D4D2CC 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

.card-body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; gap: .5rem; }

.card-tags { display: flex; gap: .35rem; flex-wrap: wrap; }
.tag {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: .2rem .5rem;
  border-radius: 4px;
}

.card-title { font-size: 1.1rem; font-weight: 600; letter-spacing: -.01em; }
.card-desc  { font-size: .875rem; color: var(--muted); line-height: 1.6; margin-top: auto; padding-top: .25rem; }

/* ─── Footer ─────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem var(--gap);
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-left { font-size: .8rem; color: var(--muted); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  font-size: .8rem;
  font-weight: 500;
  color: var(--muted);
  transition: color .15s;
}
.footer-links a:hover { color: var(--text); }

/* ─── Case page ──────────────────────────────────────────────── */
.case-header {
  padding: 2rem var(--gap) 3rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 2.5rem;
  transition: color .15s;
}
.back-link:hover { color: var(--text); }
.back-link::before { content: '←'; }

.case-meta { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }

.case-header h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.2;
  margin-bottom: .75rem;
}

.case-subtitle { font-size: 1rem; color: var(--muted); margin-bottom: .5rem; line-height: 1.5; max-width: 560px; }
.case-header .case-year { font-size: .8rem; color: var(--muted); }

.case-cover {
  width: 100%;
  aspect-ratio: 16/6;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--tag-bg);
  margin-bottom: 3rem;
}

.case-cover-placeholder {
  width: 100%;
  aspect-ratio: 16/6;
  background: linear-gradient(135deg, #E8E6E0 0%, #CCCAC4 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 3rem;
}

/* ─── Metrics ────────────────────────────────────────────────── */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 3rem;
}
.metric {
  background: var(--surface);
  padding: 1.75rem 1.5rem;
}
.metric-value {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1;
  margin-bottom: .4rem;
}
.metric-label {
  font-size: .78rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: .04em;
  text-transform: uppercase;
}

/* ─── Case body ──────────────────────────────────────────────── */
.case-body {
  max-width: 680px;
  margin: 0 auto 3rem;
  padding: 0 var(--gap);
}
.case-body h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2.5rem 0 .75rem;
  letter-spacing: -.01em;
}
.case-body p { color: var(--muted); line-height: 1.8; margin-bottom: 1rem; }
.case-body ul { color: var(--muted); line-height: 1.8; padding-left: 1.25rem; margin-bottom: 1rem; }
.case-body li { margin-bottom: .4rem; }

/* ─── Gallery ────────────────────────────────────────────────── */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap);
  padding: 0 var(--gap);
  max-width: var(--max-w);
  margin: 0 auto 3rem;
}
.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4/3;
  background: var(--tag-bg);
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.gallery-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  background: linear-gradient(135deg, #E8E6E0 0%, #D4D2CC 100%);
}

/* ─── CTA ────────────────────────────────────────────────────── */
.case-cta {
  padding: 0 var(--gap) 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font);
  font-size: .875rem;
  font-weight: 600;
  padding: .75rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--text);
  background: var(--text);
  color: var(--bg);
  cursor: pointer;
  transition: opacity .15s;
  text-decoration: none;
}
.btn:hover { opacity: .8; }
.btn-outline {
  background: transparent;
  color: var(--text);
}
.btn-outline:hover { background: var(--text); color: var(--bg); opacity: 1; }

/* ─── Utility ────────────────────────────────────────────────── */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero h1  { font-size: 2rem; }
  .projects { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; align-items: flex-start; }
  .metrics  { grid-template-columns: 1fr 1fr; }
}