/* Lakehouse Local AI Lab
   Scoped additions for the existing Lakehouse Software site.
   The site's /assets/css/site.css remains the source of truth for branding,
   global typography, navigation, buttons, page heroes, and footer styles. */

.local-ai-root {
  --lab-accent: var(--accent, #62d2a2);
  --lab-accent-2: var(--accent-2, #73a8ff);
  --lab-bg: var(--surface, rgba(255,255,255,.045));
  --lab-bg-strong: var(--surface-strong, rgba(255,255,255,.075));
  --lab-border: var(--border, rgba(255,255,255,.14));
  --lab-text: var(--text, #e9edf2);
  --lab-muted: var(--muted, #a8b0bc);
  --lab-code: #0b1118;
  --lab-good: #62d2a2;
  --lab-warn: #f2c66d;
  --lab-danger: #ff8585;
  --lab-radius: 18px;
}

.local-ai-root *, .local-ai-root *::before, .local-ai-root *::after { box-sizing: border-box; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 9999;
  background: #fff; color: #111; padding: .7rem 1rem; border-radius: 0 0 .5rem .5rem;
}
.skip-link:focus { left: 1rem; }

.lab-hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.4rem; }
.lab-meta { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.15rem 0 0; }
.lab-chip {
  display: inline-flex; align-items: center; gap: .4rem; padding: .38rem .68rem;
  border: 1px solid var(--lab-border); border-radius: 999px; color: var(--lab-muted);
  background: var(--lab-bg); font-size: .85rem; line-height: 1.2;
}
.lab-chip strong { color: var(--lab-text); font-weight: 650; }

.lab-layout {
  display: grid; grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start;
}
.lab-sidebar {
  position: sticky; top: 5.8rem; border: 1px solid var(--lab-border);
  border-radius: var(--lab-radius); background: var(--lab-bg); padding: 1rem;
}
.lab-sidebar h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; margin: 0 0 .75rem; color: var(--lab-muted); }
.lab-nav { list-style: none; margin: 0; padding: 0; display: grid; gap: .2rem; }
.lab-nav a {
  display: grid; grid-template-columns: 2.25rem 1fr auto; gap: .55rem; align-items: center;
  padding: .58rem .65rem; border-radius: 10px; text-decoration: none; color: inherit;
}
.lab-nav a:hover, .lab-nav a:focus-visible { background: var(--lab-bg-strong); }
.lab-nav a[aria-current="page"] { background: var(--lab-bg-strong); outline: 1px solid var(--lab-border); }
.lab-nav .num { color: var(--lab-accent); font-variant-numeric: tabular-nums; font-weight: 750; }
.lab-nav .name { line-height: 1.25; }
.lab-nav .done { opacity: 0; color: var(--lab-good); font-weight: 800; }
.lab-nav li.is-complete .done { opacity: 1; }

.lab-content { min-width: 0; }
.lab-content > :first-child { margin-top: 0; }
.lab-content h2 { scroll-margin-top: 6rem; margin-top: 2.5rem; }
.lab-content h3 { scroll-margin-top: 6rem; margin-top: 1.8rem; }
.lab-content p, .lab-content li { max-width: 76ch; }
.lab-content li + li { margin-top: .35rem; }

.lab-card-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin: 1.25rem 0;
}
.lab-card {
  border: 1px solid var(--lab-border); border-radius: var(--lab-radius); background: var(--lab-bg);
  padding: 1.15rem; min-width: 0;
}
a.lab-card { color: inherit; text-decoration: none; transition: transform .15s ease, background .15s ease; }
a.lab-card:hover, a.lab-card:focus-visible { transform: translateY(-2px); background: var(--lab-bg-strong); }
.lab-card .chapter { color: var(--lab-accent); font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; font-weight: 750; }
.lab-card h3 { margin: .35rem 0 .4rem; font-size: 1.05rem; }
.lab-card p { color: var(--lab-muted); margin: 0; font-size: .94rem; }
.lab-card .duration { display: block; margin-top: .8rem; color: var(--lab-muted); font-size: .82rem; }

.lab-architecture {
  border: 1px solid var(--lab-border); border-radius: var(--lab-radius); padding: clamp(1rem, 3vw, 1.5rem);
  background: linear-gradient(135deg, rgba(98,210,162,.06), rgba(115,168,255,.05)); overflow-x: auto;
}
.lab-architecture pre { margin: 0; min-width: 590px; background: transparent; border: 0; padding: 0; color: var(--lab-text); }

.lab-callout {
  border: 1px solid var(--lab-border); border-left: 4px solid var(--lab-accent-2);
  border-radius: 12px; padding: .95rem 1rem; margin: 1.25rem 0; background: var(--lab-bg);
}
.lab-callout strong:first-child { display: block; margin-bottom: .25rem; }
.lab-callout.checkpoint { border-left-color: var(--lab-good); }
.lab-callout.warning { border-left-color: var(--lab-warn); }
.lab-callout.security { border-left-color: var(--lab-danger); }
.lab-callout p:last-child { margin-bottom: 0; }

.lab-code { position: relative; margin: 1rem 0 1.3rem; }
.lab-code pre {
  margin: 0; padding: 1rem 3.6rem 1rem 1rem; overflow-x: auto; border-radius: 13px;
  background: var(--lab-code); border: 1px solid var(--lab-border); color: #e7edf4;
  line-height: 1.55; tab-size: 4;
}
.lab-code code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; font-size: .9rem; }
.lab-copy {
  position: absolute; right: .5rem; top: .5rem; appearance: none; border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.08); color: #fff; border-radius: 8px; padding: .4rem .55rem; cursor: pointer;
  font: inherit; font-size: .75rem;
}
.lab-copy:hover, .lab-copy:focus-visible { background: rgba(255,255,255,.15); }

.lab-table-wrap { overflow-x: auto; margin: 1rem 0 1.4rem; }
.lab-table { width: 100%; border-collapse: collapse; min-width: 620px; }
.lab-table th, .lab-table td { padding: .78rem .82rem; text-align: left; border-bottom: 1px solid var(--lab-border); vertical-align: top; }
.lab-table th { color: var(--lab-muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .07em; }
.lab-table td:first-child { font-weight: 700; }

.lab-steps { counter-reset: labstep; list-style: none; padding: 0; margin: 1.3rem 0; display: grid; gap: 1rem; }
.lab-steps > li {
  counter-increment: labstep; position: relative; padding: 1.05rem 1rem 1rem 3.65rem;
  border: 1px solid var(--lab-border); background: var(--lab-bg); border-radius: 14px; max-width: none;
}
.lab-steps > li::before {
  content: counter(labstep); position: absolute; left: 1rem; top: 1rem; width: 1.8rem; height: 1.8rem;
  display: grid; place-items: center; border-radius: 50%; background: var(--lab-accent); color: #07120e; font-weight: 850;
}
.lab-steps > li > strong:first-child { display: block; margin-bottom: .3rem; }

.lab-os-links { display: flex; flex-wrap: wrap; gap: .55rem; margin: .9rem 0 1.3rem; }
.lab-os-links a { border: 1px solid var(--lab-border); border-radius: 999px; padding: .42rem .72rem; text-decoration: none; color: inherit; }
.lab-os-links a:hover, .lab-os-links a:focus-visible { background: var(--lab-bg-strong); }

.lab-progress-box {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin: 2rem 0 1rem; padding: 1rem; border: 1px solid var(--lab-border); border-radius: 14px; background: var(--lab-bg);
}
.lab-complete {
  appearance: none; border: 1px solid var(--lab-border); border-radius: 10px; background: transparent;
  color: inherit; padding: .62rem .8rem; cursor: pointer; font: inherit;
}
.lab-complete[aria-pressed="true"] { background: rgba(98,210,162,.14); border-color: var(--lab-good); }

.lab-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 2rem 0 0; }
.lab-pager a { border: 1px solid var(--lab-border); border-radius: 14px; padding: 1rem; text-decoration: none; color: inherit; background: var(--lab-bg); }
.lab-pager a:last-child { text-align: right; }
.lab-pager small { display: block; color: var(--lab-muted); margin-bottom: .2rem; }

.lab-download { display: flex; gap: .8rem; align-items: center; flex-wrap: wrap; border: 1px solid var(--lab-border); border-radius: var(--lab-radius); padding: 1rem; background: var(--lab-bg); }
.lab-download p { margin: 0; flex: 1 1 340px; }

.lab-demo-terminal {
  background: #091019; border: 1px solid var(--lab-border); border-radius: 14px; overflow: hidden; margin: 1rem 0 1.5rem;
}
.lab-demo-terminal .bar { display: flex; gap: .38rem; padding: .65rem .75rem; border-bottom: 1px solid var(--lab-border); }
.lab-demo-terminal .dot { width: .65rem; height: .65rem; border-radius: 50%; background: rgba(255,255,255,.25); }
.lab-demo-terminal pre { margin: 0; padding: 1rem; overflow-x: auto; color: #d8f7e8; }

.lab-kicker { color: var(--lab-accent); font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 800; }
.lab-muted { color: var(--lab-muted); }
.lab-small { font-size: .88rem; }

@media (max-width: 960px) {
  .lab-layout { grid-template-columns: 1fr; }
  .lab-sidebar { position: static; }
  .lab-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .lab-nav, .lab-card-grid, .lab-pager { grid-template-columns: 1fr; }
  .lab-pager a:last-child { text-align: left; }
  .lab-architecture { margin-inline: -0.2rem; }
  .lab-code pre { padding-right: 1rem; padding-top: 2.9rem; }
  .lab-copy { left: .5rem; right: auto; }
}

@media (prefers-reduced-motion: reduce) {
  a.lab-card { transition: none; }
}