:root {
  --bg: #F4F8FB;
  --fg: #0C2233;
  --accent: #2E6FA9;
  --muted: #5A7489;
  --surface: #FFFFFF;
  --border: #D9E3EC;
  --deep: #0C2233;
  --pale: #E6EEF5;
  --warn: #B5403A;
  --heading: 'Space Grotesk', sans-serif;
  --body: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sidenav-w: 232px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--heading);
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); line-height: 1.15; }
h2 { font-size: clamp(1.3rem, 2.2vw, 1.7rem); line-height: 1.25; }
h3 { font-size: 1.15rem; margin-bottom: 0.4em; }

p { margin: 0 0 1.1em; }
code { font-family: var(--mono); font-size: 0.92em; background: var(--pale); padding: 0.05em 0.35em; border-radius: 3px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 2rem;
}
.wrap.narrow { max-width: 720px; }

/* Sidebar layout */
body.has-sidenav { display: flex; min-height: 100vh; }

.sidenav {
  width: var(--sidenav-w);
  flex: 0 0 var(--sidenav-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.8rem 1.4rem 1.4rem;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}
.sidenav .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.sidenav .brand:hover { text-decoration: none; }
.sidenav-tag {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.sidenav nav {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-top: 0.4rem;
}
.sidenav nav a {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.96rem;
  padding: 0.35rem 0.55rem;
  border-radius: 4px;
  border-left: 2px solid transparent;
}
.sidenav nav a:hover { color: var(--fg); text-decoration: none; background: var(--pale); }
.sidenav nav a.active {
  color: var(--fg);
  border-left-color: var(--accent);
  background: var(--pale);
}
.sidenav-foot { margin-top: auto; display: flex; flex-direction: column; gap: 0.8rem; }
.sidenav-foot .small { font-size: 0.78rem; line-height: 1.4; }
.sidenav-foot .small span { color: var(--fg); font-family: var(--mono); }

.main-col { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }

/* Top strip (imperfection: warn note) */
.topstrip {
  background: #FFF7ED;
  border-bottom: 1px solid #F1D8B0;
  color: #7A4B10;
  font-size: 0.9rem;
}
.topstrip .strip-note { margin: 0.55rem 0; }
.topstrip code { background: rgba(0,0,0,0.05); color: inherit; }

/* Hero */
.hero {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.hero h1 { max-width: 22ch; }
.lede { font-size: 1.12rem; max-width: 62ch; margin-top: 1rem; color: var(--fg); }
.lede-sub { font-size: 1rem; max-width: 62ch; color: var(--muted); }
.hero-ornament { margin-top: 2.5rem; max-width: 600px; }
.hero-ornament svg { width: 100%; height: auto; display: block; }

/* Gallery */
.gallery { padding: 3.5rem 0; }
.gallery-head {
  margin-bottom: 2.2rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.gallery-head h2 { margin: 0; }
.muted { color: var(--muted); font-size: 0.95rem; }
.muted.small { font-size: 0.82rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.4rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 24px -12px rgba(12, 34, 51, 0.25);
}
.card-art { aspect-ratio: 5 / 3; background: var(--pale); border-bottom: 1px solid var(--border); }
.card-art svg { width: 100%; height: 100%; display: block; }
.card-body { padding: 1.1rem 1.25rem 1.3rem; }
.card-body h3 { font-family: var(--heading); display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.card-body .new {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  background: var(--accent);
  color: #fff;
  padding: 0.12em 0.5em;
  border-radius: 3px;
  text-transform: lowercase;
  font-weight: 500;
}
.tag {
  font-size: 0.76rem;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.02em;
  margin: 0 0 0.7rem;
}
.card-body p:last-child { margin-bottom: 0; font-size: 0.95rem; }

/* Availability */
.availability {
  background: var(--deep);
  color: var(--bg);
  padding: 3.5rem 0;
}
.availability h2 { color: var(--bg); }
.availability p { max-width: 62ch; }
.availability a { color: #7EB0D9; }
.availability .muted { color: #7EB0D9; }

/* Page */
.page { padding: 3.5rem 0 4rem; }
.page h1 { margin-bottom: 1.2rem; }
.page h2 { margin-top: 2.2rem; }
.note { padding: 1.4rem 0; border-bottom: 1px solid var(--border); }
.note:last-of-type { border-bottom: none; }
.note h2 { margin-top: 0; font-size: 1.18rem; }

/* Colophon */
.swatches { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1rem 0 1.4rem; font-family: var(--mono); font-size: 0.85rem; }
.swatch { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--muted); }
.sw { width: 22px; height: 22px; border-radius: 3px; display: inline-block; }
.glossary { margin: 1rem 0 2rem; }
.glossary dt { font-family: var(--heading); font-weight: 700; margin-top: 0.9rem; }
.glossary dt em { font-weight: 400; color: var(--muted); }
.glossary dd { margin: 0.15rem 0 0 0; }
.rev-list { list-style: none; padding: 0; margin: 1rem 0 0; }
.rev-list li {
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1rem;
  font-size: 0.95rem;
}
.rev-list li span {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  padding-top: 0.1rem;
}

/* Bench */
.bench-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.4rem;
  margin: 2rem 0 2.6rem;
}
.bench-case {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.bench-art { background: var(--pale); border-bottom: 1px solid var(--border); aspect-ratio: 5/3; }
.bench-art svg { width: 100%; height: 100%; display: block; }
.bench-body { padding: 1.1rem 1.25rem 1.3rem; }
.bench-body h3 { margin-bottom: 0.2rem; }
.bench-body .tag { margin-bottom: 0.8rem; }
.check-list { padding-left: 1.2rem; }
.check-list li { margin-bottom: 0.45rem; }

/* Broken */
.broken-case {
  padding: 1.6rem 0 1.8rem;
  border-bottom: 1px solid var(--border);
}
.broken-case:last-of-type { border-bottom: none; }
.broken-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.broken-head h2 { margin: 0 0 0.3em; }
.broken-head .tag { margin: 0; }
.broken-diagram {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  background: var(--pale);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin: 0.6rem 0 1rem;
  padding: 0.4rem;
}

/* Handwritten */
.handwritten { margin-top: 2.2rem; }
.handwritten svg { max-width: 100%; height: auto; }

/* 404 */
.notfound { padding-top: 4rem; }
.shell {
  background: var(--deep);
  color: var(--bg);
  padding: 1.2rem 1.4rem;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1.7;
  overflow-x: auto;
  margin-bottom: 2rem;
}
.shell .muted-inline { color: #7EB0D9; }
.shell .cursor {
  display: inline-block;
  width: 0.5em;
  background: var(--bg);
  color: var(--deep);
  animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { to { visibility: hidden; } }
.link { font-family: var(--heading); font-weight: 500; }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 2.4rem;
  margin-top: 3rem;
  font-size: 0.9rem;
  color: var(--muted);
}
footer p { margin: 0.2rem 0; }
footer em { color: var(--fg); font-style: italic; }

/* Responsive */
@media (max-width: 900px) {
  body.has-sidenav { flex-direction: column; }
  .sidenav {
    width: 100%;
    flex: none;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.2rem;
    gap: 0.8rem;
  }
  .sidenav nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.3rem 0.4rem;
    margin-top: 0;
  }
  .sidenav nav a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 0.3rem 0.55rem;
  }
  .sidenav nav a.active { border-left: none; border-bottom-color: var(--accent); }
  .sidenav-foot { flex-direction: row; gap: 1.5rem; margin-top: 0.3rem; }
  .sidenav-foot .small { font-size: 0.72rem; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 1.2rem; }
  .hero { padding: 2.8rem 0 2.2rem; }
  .gallery { padding: 2.4rem 0; }
  .card-body { padding: 1rem 1.1rem 1.1rem; }
  .rev-list li { grid-template-columns: 1fr; gap: 0.1rem; }
  h1 { font-size: 1.8rem; }
}