/* AI Lab + case study pages (redesign C). Builds on spatial.css tokens. */
.subpage { background: radial-gradient(90% 50% at 80% 0%, rgba(125,140,255,.10), transparent 60%), var(--bg); }
.nav-back { display: none; color: var(--teal); text-decoration: none; font-weight: 600; min-height: 44px; align-items: center; }
@media (max-width: 900px) { .nav-back { display: inline-flex; margin-left: auto; } }
.nav-links a[aria-current="page"] { color: var(--text); background: rgba(61,232,216,.12); }

.lab-hero { padding: 120px 0 18px; }
.lab-hero h1, .case-head h1 { margin: 0; font: 800 clamp(2rem, 4.6vw, 3.6rem)/1.02 var(--display); letter-spacing: -.03em; }
.lab-intro { max-width: 680px; margin: 16px 0 0; color: var(--muted); font-size: 1.08rem; line-height: 1.6; }
.lab-sec { padding: 26px 0 30px; }
.lab-h { margin: 0 0 18px; font: 700 1.35rem var(--display); letter-spacing: -.02em; }

/* case study cards */
.case-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.case-card { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 24px; padding: 14px; border-radius: 18px; border: 1px solid var(--line);
  background: var(--panel-solid); color: var(--text); text-decoration: none; transition: border-color .25s, transform .25s; }
.case-card:hover { color: var(--text); border-color: rgba(61,232,216,.55); transform: translateY(-2px); }
.case-cover img { width: 100%; height: 100%; max-height: 220px; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 12px; display: block; background: #0b1020; }
.case-text { display: flex; flex-direction: column; gap: 8px; padding: 4px 6px 4px 0; min-width: 0; }
.case-meta { font: 500 .8125rem var(--mono); color: var(--muted); }
.case-title { font: 700 clamp(1.1rem, 2vw, 1.4rem)/1.25 var(--display); letter-spacing: -.015em; }
.case-sum { color: var(--muted); line-height: 1.55; }
.case-text .tags { margin-top: auto; }
.draft-pill { padding: 1px 8px; border-radius: 999px; border: 1px solid #ffd36e; color: #ffd36e; }
.case-empty { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; padding: 22px; border-radius: 16px; border: 1px solid var(--line-strong); background: #0c1326; }
.case-empty p { margin: 0; color: var(--muted); } .case-empty strong { color: var(--text); }
@media (max-width: 700px) { .case-card { grid-template-columns: 1fr; gap: 12px; } .case-cover img { max-height: 200px; } }

/* experiment grid */
.exp-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.exp-grid .lab-item { display: flex; }
.exp-grid .lab-card { display: flex; flex-direction: column; width: 100%; text-decoration: none; }
.exp-grid .lab-media img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; }
.exp-grid .lab-body { padding: 16px 18px 18px; gap: 8px; flex: 1; }
.exp-grid .lab-item:target .lab-card { border-color: var(--teal); box-shadow: 0 0 0 2px rgba(61,232,216,.35); }

/* case study article */
.case { padding: 100px 0 40px; }
.case-wrap { max-width: 860px; }
.case-crumb { margin: 0 0 18px; font: 500 .875rem var(--mono); color: var(--muted); }
.case-crumb a { display: inline-block; padding: 6px 0; }
.case-draft { display: inline-block; margin: 0 0 14px; padding: 4px 12px; border-radius: 999px; border: 1px solid #ffd36e; color: #ffd36e; font: 500 .8125rem var(--mono); }
.case-head .case-meta { margin: 0 0 10px; }
.case-head .case-meta a { display: inline-block; padding: 4px 0; }
.case-lede { margin: 16px 0 0; font-size: 1.15rem; line-height: 1.6; color: var(--muted); }
.case-head .tags { margin-top: 16px; }
.case-cover { margin: 28px 0 8px; }
.case-cover .case-embed { display: block; width: 100%; aspect-ratio: 16 / 9; border: 1px solid var(--line); border-radius: 16px; background: #04060c; }
.case-cover img, .case-cover video { width: 100%; max-height: 480px; object-fit: cover; border-radius: 16px; border: 1px solid var(--line); background: #04060c; }
.case-body { font-size: 1.05rem; line-height: 1.72; color: #dfe5f6; }
.case-body p { margin: 0 0 16px; }
.case-body code { font: .92em var(--mono); background: rgba(125,140,255,.12); padding: 1px 6px; border-radius: 5px; }
.case-body img, .case-body video { max-width: 100%; border-radius: 12px; }
.case-sec { padding: 26px 0 10px; border-top: 1px solid var(--line); }
.case-sec:first-child { border-top: 0; }
.case-sec h2 { margin: 0 0 16px; font: 700 1.4rem var(--display); letter-spacing: -.02em; color: var(--text); }
.case-sec h2::before { content: ''; display: inline-block; width: 10px; height: 10px; margin-right: 12px; border-radius: 3px; vertical-align: 2px; background: linear-gradient(135deg, var(--teal), var(--magenta)); }

/* pipeline: numbered nodes joined by arrows; horizontal on desktop, vertical on phones */
.case-body ol.pipeline { list-style: none; margin: 8px 0 22px; padding: 0; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 26px; counter-reset: none; }
.case-body ol.pipeline li { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 16px 14px 14px; border-radius: 14px;
  border: 1px solid rgba(61,232,216,.35); background: linear-gradient(180deg, rgba(61,232,216,.08), rgba(125,140,255,.04)), #0c1326; }
.case-body ol.pipeline li:not(:last-child)::after { content: ''; position: absolute; top: 34px; right: -22px; width: 18px; height: 2px; background: var(--teal); }
.case-body ol.pipeline li:not(:last-child)::before { content: ''; position: absolute; top: 30px; right: -23px; border: 5px solid transparent; border-left: 7px solid var(--teal); border-right: 0; }
.case-body ol.pipeline .num { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font: 700 .875rem var(--display); color: #04121a; background: linear-gradient(135deg, var(--teal), #a9c1ff); }
.case-body ol.pipeline .step { font: 600 .95rem/1.3 var(--display); color: var(--text); }
.case-body ol.pipeline .detail { font-size: .875rem; line-height: 1.45; color: var(--muted); }
@media (max-width: 900px) {
  .case-body ol.pipeline { grid-auto-flow: row; grid-template-columns: 1fr; grid-auto-columns: auto; gap: 18px; }
  .case-body ol.pipeline li { display: grid; grid-template-columns: 30px 1fr; column-gap: 12px; row-gap: 2px; }
  .case-body ol.pipeline .num { grid-row: span 2; }
  .case-body ol.pipeline li:not(:last-child)::after { top: auto; bottom: -16px; left: 28px; right: auto; width: 2px; height: 14px; }
  .case-body ol.pipeline li:not(:last-child)::before { top: auto; bottom: -19px; left: 24px; right: auto; border: 5px solid transparent; border-top: 7px solid var(--teal); border-bottom: 0; }
}

/* what I learned: highlighted takeaways */
.case-body ul.takeaways { list-style: none; margin: 0 0 16px; padding: 0; display: grid; gap: 12px; }
.case-body ul.takeaways li { padding: 14px 18px 14px 20px; border-radius: 12px; border: 1px solid rgba(224,113,255,.3); border-left: 4px solid var(--magenta); background: rgba(224,113,255,.06); }
.case-body ul.takeaways strong { color: var(--text); }
.case-body .case-tools ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.case-body .case-tools li { padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line-strong); font: 500 .875rem var(--mono); }
.case-end { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--line); }
.case-missing { padding: 40px 0; }
.case-missing h1 { font: 700 2rem var(--display); margin: 0 0 10px; }
.case-loading { color: var(--muted); }
.exp-grid .lab-item, .exp-grid .lab-item:nth-child(n) { grid-column: auto !important; }
/* blog-lib names the pipeline detail span "detail", which collides with the dialog class: reset it */
.case-body ol.pipeline .detail { all: unset; display: block; font-size: .875rem; line-height: 1.45; color: var(--muted); }
.lab-card .tags, .case-card .tags { flex-wrap: nowrap; }
.lab-card .tags .tag, .case-card .tags .tag { white-space: nowrap; flex: 0 0 auto; }
.tags .tag[hidden] { display: none; }
.case-body .case-tools ul { display: grid; gap: 8px; }
.case-body .case-tools li { font: 400 .95rem/1.5 var(--body); padding: 10px 14px; border-radius: 10px; border: 1px solid var(--line); background: #0c1326; }

/* pipeline on desktop: rows of three, so each step has room for its detail */
@media (min-width: 901px) {
  .case-body ol.pipeline { grid-auto-flow: row; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-auto-columns: auto; row-gap: 22px; }
  .case-body ol.pipeline li:nth-child(3n)::after, .case-body ol.pipeline li:nth-child(3n)::before { display: none; }
  .case-body ol.pipeline .step { font-size: 1rem; }
  .case-body ol.pipeline .detail { font-size: .9rem !important; }
}

/* round 9: long-form reading scale */
.case-body { font-size: 17px; line-height: 1.6; }
.case-body > *, .case-sec > p, .case-sec > ul, .case-lede { max-width: 70ch; }
.case-body ol.pipeline { max-width: none; }
.case-body ol.pipeline .detail { font-size: 14px !important; }
.case-body ul.takeaways li { font-size: 16px; background: rgba(224,113,255,.14); border-color: rgba(224,113,255,.45); color: #f1eaf9; }
.case-body .case-tools li { font-size: 15px; }
.case-meta, .case-crumb { font-size: 14px; }

.lab-room-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin: 20px 0 0; }
.lab-room-cta span { color: var(--muted); font-size: .92rem; }