/* ============================================================
   HP Wireframe Composite Sheets — montage of multi-page layouts
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #b8b6b1;
  --paper: #ffffff;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-mute: #8a8a8a;
  --line: #c8c5bd;
  --font-sans: 'Inter', 'Noto Sans JP', system-ui, sans-serif;
  --font-serif: 'Fraunces', serif;
  --font-mono: 'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(184, 182, 177, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding: 16px 32px;
}
.header-inner {
  max-width: 1480px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.15em; color: var(--ink-soft);
  text-transform: uppercase;
}
.brand strong { color: var(--ink); font-weight: 500; }

.hero {
  padding: 80px 32px 56px;
  max-width: 1480px; margin: 0 auto;
}
.hero .eyebrow {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.2em; color: var(--ink-soft);
  text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--font-serif); font-weight: 400;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05; letter-spacing: -0.02em;
  color: var(--ink); margin-bottom: 20px;
  max-width: 900px;
}
.hero h1 em { font-style: italic; font-weight: 300; color: var(--ink-soft); }
.hero p {
  font-size: 15px; line-height: 1.7;
  color: var(--ink-soft); max-width: 640px;
}
.hero .note {
  margin-top: 24px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.05em; color: var(--ink-soft);
  padding: 14px 18px; background: rgba(0,0,0,0.04);
  border-left: 2px solid var(--ink);
  max-width: 720px;
  line-height: 1.7;
}

.sheets {
  max-width: 1480px;
  margin: 32px auto 80px;
  padding: 0 32px;
  display: flex; flex-direction: column;
  gap: 40px;
}

.sheet-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: box-shadow .2s;
}
.sheet-card:hover { box-shadow: 0 20px 40px -20px rgba(0,0,0,0.18); }

.sheet-head {
  padding: 24px 32px;
  display: flex; justify-content: space-between; align-items: flex-end;
  border-bottom: 1px solid var(--line);
  gap: 20px;
  flex-wrap: wrap;
}
.sheet-head .info {
  display: flex; flex-direction: column; gap: 4px;
  flex: 1; min-width: 280px;
}
.sheet-head .id {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.18em; color: var(--ink-soft);
  text-transform: uppercase;
}
.sheet-head .title {
  font-family: var(--font-serif); font-weight: 400;
  font-size: 28px; line-height: 1.15;
  letter-spacing: -0.01em; color: var(--ink);
}
.sheet-head .title em { font-style: italic; font-weight: 300; color: var(--ink-soft); }
.sheet-head .desc {
  font-size: 13px; line-height: 1.6;
  color: var(--ink-soft); margin-top: 6px;
}
.sheet-head .dl {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--ink);
  padding: 10px 18px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all .15s;
  white-space: nowrap;
}
.sheet-head .dl:hover { background: var(--paper); color: var(--ink); }

.sheet-canvas {
  background: var(--paper);
  padding: 24px;
}
.sheet-canvas svg {
  width: 100%;
  height: auto;
  display: block;
}

footer.foot {
  border-top: 1px solid var(--line);
  padding: 32px;
  max-width: 1480px; margin: 0 auto;
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.2em; color: var(--ink-soft);
  text-transform: uppercase;
}