/* ============ LABS: project pages (Tsugi.html, Spent.html, Stayin-Alive.html) ============
   V2 design: builds on the tokens and .btn/.mono/.serif rules in each page's inline style. */
.back-link { display: inline-flex; align-items: center; min-height: 48px; margin-top: 56px; color: var(--ink); }

.lab-hero { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 6.7vw, 96px); align-items: end; padding: 24px 0 clamp(40px, 4vw, 56px); }
.lab-status { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.lab-dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.lab-h1 { margin: 16px 0 0; padding-bottom: 8px; font-size: clamp(48px, 5.6vw, 80px); line-height: 1.05; letter-spacing: -0.02em; }
.lab-mark { color: var(--muted); }
.lab-tagline { margin: 16px 0 0; max-width: 32em; font-size: 18px; line-height: 1.6; color: var(--body); }
.lab-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-notyet { border-style: dashed; color: var(--muted); cursor: default; }
.btn-notyet:hover { border-color: var(--line); color: var(--muted); }
.lab-meta { margin-top: 16px; color: var(--muted); }
.lab-meta a { text-decoration: underline; text-underline-offset: 3px; }

.lab-visual { height: clamp(360px, 39vw, 560px); border-radius: 6px; overflow: hidden; display: flex; justify-content: center; align-items: flex-start; gap: 24px; padding-top: 56px; box-sizing: border-box; }
.lab-visual img { width: min(248px, 32%); height: auto; display: block; border: 5px solid var(--frame); border-radius: 24px; }
.lab-visual .lab-visual-2 { margin-top: 48px; }
.lab-visual.is-wide { padding: 0; }
.lab-visual.is-wide img { width: 100%; height: 100%; object-fit: cover; border: 0; border-radius: 0; }

.lab-body { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: clamp(32px, 4.5vw, 64px); margin-top: clamp(64px, 7vw, 96px); }
.lab-aside { display: flex; flex-direction: column; gap: 24px; padding-top: 24px; border-top: 1px solid var(--line); align-self: start; }
.lab-k { margin: 0; color: var(--muted); font-weight: 400; }
.lab-aside p { margin: 8px 0 0; font-size: 16px; line-height: 1.55; }
.lab-links { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; font-size: 16px; }
.lab-links a { color: var(--acc); }
.lab-main { display: flex; flex-direction: column; gap: clamp(48px, 5vw, 72px); min-width: 0; }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 4vw, 56px); padding-top: 24px; border-top: 1px solid var(--line); }
.body-p { margin: 16px 0 0; font-size: 18px; line-height: 1.65; color: var(--body); }
.lab-h2 { margin: 0; padding-bottom: 8px; font-size: 34px; line-height: 1.15; letter-spacing: -0.015em; }
.dec-list { list-style: none; margin: 24px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 40px; }
.dec-list li { display: grid; grid-template-columns: 32px minmax(0, 1fr); font-size: 16px; line-height: 1.6; color: var(--body); }
.dec-num { color: var(--muted); padding-top: 4px; }
.shot-grid { margin-top: 24px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.shot-grid img { width: 100%; aspect-ratio: 390 / 844; object-fit: cover; object-position: top; border-radius: 16px; border: 4px solid var(--frame); background: var(--tile, #ECEEEA); display: block; }

.next-lab { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-top: clamp(72px, 8vw, 112px); padding: 32px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.next-name { margin-top: 8px; font-size: clamp(32px, 3.4vw, 48px); line-height: 1.1; }
.next-tag { margin-top: 8px; font-size: 16px; color: var(--body); }
.next-arrow { font-size: 32px; }

@media (max-width: 900px) {
  .lab-hero, .lab-body { grid-template-columns: minmax(0, 1fr); }
  .lab-hero { gap: 24px; }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .two-col, .dec-list { grid-template-columns: minmax(0, 1fr); }
  .lab-visual { gap: 12px; padding-top: 32px; }
  .lab-visual img { border-width: 3px; border-radius: 16px; }
  .lab-visual .lab-visual-2 { margin-top: 32px; }
}