/* Agent Lab: dual-track missions, XP, badges, Feynman recall and review. */

.lab-page { --lab-violet: #7c3aed; --lab-cyan: #0e8f9e; }
.lab-page .article { max-width: 1120px; }
.lab-page [hidden] { display: none !important; }

/* ---------- Track switch ---------- */
.lab-track-switch {
  display: inline-flex; padding: 4px; gap: 3px; border: 1px solid var(--border);
  border-radius: 11px; background: var(--surface-2);
}
.lab-track-switch button {
  display: inline-flex; align-items: center; gap: 7px; padding: 6px 11px;
  border: 0; border-radius: 8px; background: transparent; color: var(--muted);
  font: 600 12.5px/1 var(--font-sans); cursor: pointer; white-space: nowrap;
}
.lab-track-switch button:hover { color: var(--text); }
.lab-track-switch button.active {
  background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm);
}
.lab-track-switch button[data-track="python"].active { color: var(--accent-text); }
.lab-track-switch button[data-track="java"].active { color: var(--amber); }
.lab-track-logo {
  display: grid; place-items: center; width: 22px; height: 22px; border-radius: 6px;
  background: var(--accent-soft); color: var(--accent-text);
  font: 700 10.5px/1 var(--font-mono);
}
.lab-track-switch button[data-track="java"] .lab-track-logo { background: var(--amber-soft); color: var(--amber); }
html[data-lab-track="python"] .lab-track-panel[data-track-panel="java"],
html[data-lab-track="java"] .lab-track-panel[data-track-panel="python"] { display: none; }

/* ---------- Lab sidebar ---------- */
.lab-side-missions a { display: flex; align-items: center; gap: 7px; padding-left: 10px; white-space: normal; }
.lab-side-no { flex: none; width: 18px; font: 700 9.5px/1 var(--font-mono); color: var(--faint); }
.lab-side-title { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
html[data-lang="mixed"] .lab-side-title .lang-inline.lang-en { display: none; }
.lab-side-tick { flex: none; color: var(--green); font-size: 11px; font-weight: 800; }
.lab-side-xp {
  margin: 0 10px; padding: 7px 10px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface-2); color: var(--muted); font-size: 11px;
}
.lab-side-xp strong { color: var(--text); font-family: var(--font-mono); }

/* ---------- Dashboard hero ---------- */
.lab-hero {
  display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.8fr);
  gap: 26px; align-items: stretch; padding: 28px; margin: 6px 0 24px;
  border: 1px solid var(--border); border-radius: 18px;
  background:
    radial-gradient(900px 340px at -10% -30%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
    radial-gradient(640px 300px at 110% 10%, color-mix(in srgb, var(--lab-violet) 13%, transparent), transparent 65%),
    var(--surface);
  box-shadow: var(--shadow-sm);
}
.lab-hero h1 { margin: 6px 0 14px; }
.lab-hero .lede { max-width: 62ch; }
.lab-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
.lab-track-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 20px; }
.lab-track-hint { font-size: 12px; color: var(--faint); }

.lab-level-card {
  display: flex; flex-direction: column; gap: 16px; padding: 20px;
  border: 1px solid var(--border); border-radius: 14px; background: color-mix(in srgb, var(--surface) 78%, transparent);
  backdrop-filter: blur(6px);
}
.lab-ring { position: relative; width: 148px; height: 148px; margin: 2px auto 0; }
.lab-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.lab-ring circle { fill: none; stroke-width: 8; }
.lab-ring-bg { stroke: var(--border); }
.lab-ring-fg {
  stroke: url(#lab-ring-gradient); stroke: var(--accent); stroke-linecap: round;
  stroke-dasharray: 326.7; stroke-dashoffset: 326.7; transition: stroke-dashoffset 0.5s ease;
}
.lab-ring-center { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; gap: 2px; }
.lab-ring-center strong { font-size: 18px; line-height: 1.2; letter-spacing: -0.01em; max-width: 112px; }
html[data-lang="mixed"] .lab-ring-center .lang-inline.lang-en { display: none; }
.lab-ring-center > span { font: 600 11px/1.4 var(--font-mono); color: var(--muted); }
.lab-hero-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.lab-stat {
  display: flex; flex-direction: column; gap: 1px; padding: 9px 11px;
  border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2);
}
.lab-stat strong { font-size: 18px; letter-spacing: -0.02em; line-height: 1.25; }
.lab-stat span { font-size: 10.5px; color: var(--muted); }
.lab-level-progress { display: flex; flex-direction: column; gap: 6px; font-size: 11px; color: var(--muted); }
.lab-level-bar { height: 6px; border-radius: 20px; background: var(--bg-soft); overflow: hidden; }
.lab-level-bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--lab-violet)); transition: width 0.4s ease; }

/* ---------- Next mission ---------- */
.lab-next {
  display: flex; align-items: center; justify-content: space-between; gap: 22px;
  padding: 22px 24px; margin: 0 0 8px; border: 1px solid var(--border);
  border-left: 4px solid var(--accent); border-radius: 0 14px 14px 0;
  background: var(--surface); box-shadow: var(--shadow-sm);
}
.lab-next-kicker { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); }
.lab-next h2 { margin: 4px 0 5px; padding: 0; border: 0; font-size: 23px; }
.lab-next p { margin: 0 0 12px; color: var(--muted); }
.lab-next-badge {
  display: grid; place-items: center; flex: none; width: 78px; height: 78px; border-radius: 24px;
  background: linear-gradient(135deg, var(--accent), var(--lab-violet)); color: #fff;
  font: 800 30px/1 var(--font-sans); box-shadow: var(--shadow-md);
}

/* ---------- Mission grid ---------- */
.lab-section { margin: 40px 0 8px; scroll-margin-top: calc(var(--topbar-h) + 16px); }
.lab-section-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.lab-section-head h2 { margin-bottom: 8px; }
.lab-text-link { font-size: 12.5px; font-weight: 600; }
.lab-filters { display: inline-flex; padding: 3px; gap: 2px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); }
.lab-filters button {
  padding: 5px 10px; border: 0; border-radius: 6px; background: transparent;
  color: var(--muted); font: 600 11.5px/1 var(--font-sans); cursor: pointer;
}
.lab-filters button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.lab-mission-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 14px; margin-top: 14px; }
.lab-mission-card {
  position: relative; display: flex; flex-direction: column; gap: 7px; padding: 18px 18px 14px;
  border: 1px solid var(--border); border-radius: 13px; background: var(--surface);
  color: var(--text); box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.lab-mission-card:hover { transform: translateY(-2px); border-color: var(--border-strong); box-shadow: var(--shadow-md); text-decoration: none; color: var(--text); }
.lab-mission-card.done { border-color: color-mix(in srgb, var(--green) 32%, var(--border)); }
.lab-mission-card.dual { background-image: linear-gradient(135deg, transparent 70%, color-mix(in srgb, var(--accent) 7%, transparent)); }
.lab-mission-card[hidden] { display: none; }
.lab-card-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.lab-card-num { font: 700 11px/1 var(--font-mono); letter-spacing: 0.08em; color: var(--faint); }
.lab-card-xp { font: 700 11px/1 var(--font-mono); color: var(--accent-text); background: var(--accent-soft); border-radius: 20px; padding: 4px 8px; }
.lab-card-badge {
  position: absolute; right: 16px; top: 44px; display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 11px; background: var(--bg-soft);
  color: var(--faint); font: 800 15px/1 var(--font-sans); opacity: 0.75;
}
.lab-mission-card.done .lab-card-badge { background: var(--green-soft); color: var(--green); opacity: 1; }
.lab-mission-card h3 { margin: 0; font-size: 18px; padding-right: 42px; }
.lab-card-tagline { margin: 0; font-size: 12.75px; color: var(--muted); min-height: 2.4em; }
.lab-card-analog { font-size: 11.5px; color: var(--faint); }
.lab-card-skills { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 3px; }
.lab-skill-chip {
  display: inline-flex; padding: 2px 7px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--muted); font-size: 10.5px; line-height: 1.5;
}
.lab-card-foot { display: flex; align-items: center; gap: 5px; margin-top: 6px; padding-top: 9px; border-top: 1px solid var(--border); }
.lab-track-pill {
  display: inline-grid; place-items: center; width: 24px; height: 20px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--faint);
  font: 700 9.5px/1 var(--font-mono);
}
.lab-track-pill.done { background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 34%, transparent); color: var(--green); }
.lab-track-pill[data-track-pill$=":java"].done { background: var(--amber-soft); border-color: color-mix(in srgb, var(--amber) 34%, transparent); color: var(--amber); }
.lab-card-status { margin-left: auto; font-size: 10.5px; color: var(--faint); }
.lab-mission-card.done .lab-card-status { color: var(--green); font-weight: 600; }

/* ---------- Two-column panels ---------- */
.lab-two-col { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: 16px; margin: 34px 0 8px; }
.lab-panel { border: 1px solid var(--border); border-radius: 13px; background: var(--surface); padding: 18px; }
.lab-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.lab-panel-head h2 { margin: 0; padding: 0; border: 0; font-size: 16px; }
.lab-panel-head > span {
  min-width: 22px; padding: 1px 7px; border-radius: 20px; background: var(--accent-soft);
  color: var(--accent-text); font: 700 10.5px/1.7 var(--font-mono); text-align: center;
}
.lab-review-queue { display: flex; flex-direction: column; gap: 7px; }
.lab-review-item {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px;
  padding: 9px 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2);
}
.lab-review-item strong { font-size: 12.5px; }
.lab-review-item small { display: block; color: var(--faint); font-size: 10.5px; }
.lab-review-btns { display: inline-flex; flex-wrap: wrap; gap: 3px; }
.lab-review-btns button {
  padding: 3px 6px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface);
  color: var(--muted); font: 600 10px/1.4 var(--font-sans); cursor: pointer;
}
.lab-review-btns button:hover { border-color: var(--accent); color: var(--accent-text); }
.lab-empty { padding: 14px; border: 1px dashed var(--border-strong); border-radius: 9px; color: var(--faint); font-size: 12px; text-align: center; }
.lab-activity { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; max-height: 250px; overflow-y: auto; }
.lab-activity li { display: flex; gap: 8px; align-items: flex-start; padding: 5px 0; border-bottom: 1px dashed var(--border); font-size: 11.5px; color: var(--text-soft); }
.lab-activity li:last-child { border-bottom: 0; }
.lab-activity .act-dot { flex: none; width: 6px; height: 6px; margin-top: 6px; border-radius: 50%; background: var(--accent); }
.lab-activity .act-dot.review { background: var(--green); }
.lab-activity .act-dot.feynman { background: var(--lab-violet); }
.lab-activity time { margin-left: auto; flex: none; color: var(--faint); font-size: 10px; font-family: var(--font-mono); }

/* ---------- Skills ---------- */
.lab-skill-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 10px; margin-top: 14px; }
.lab-skill { padding: 12px 13px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.lab-skill-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; font-size: 12.5px; font-weight: 600; }
.lab-skill-head strong { font: 700 12px/1 var(--font-mono); color: var(--accent-text); }
.lab-skill-bar { height: 5px; margin: 8px 0 6px; border-radius: 20px; background: var(--bg-soft); overflow: hidden; }
.lab-skill-bar i { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--lab-violet)); transition: width 0.4s ease; }
.lab-skill-desc { font-size: 10.5px; color: var(--faint); }
.lab-skill-missions { display: flex; flex-wrap: wrap; gap: 3px; margin-top: 6px; }
.lab-skill-missions span { padding: 1px 5px; border-radius: 5px; background: var(--bg-soft); color: var(--muted); font: 600 9.5px/1.6 var(--font-mono); }

/* ---------- Badges ---------- */
.lab-badge-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 9px; margin-top: 14px; }
.lab-badge-card {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
  opacity: 0.62; filter: saturate(0.35); transition: opacity 0.2s ease, filter 0.2s ease;
}
.lab-badge-card.earned { opacity: 1; filter: none; border-color: color-mix(in srgb, var(--accent) 30%, var(--border)); background: linear-gradient(135deg, var(--surface), var(--accent-soft)); }
.lab-badge-mono {
  display: grid; place-items: center; flex: none; width: 34px; height: 34px; border-radius: 10px;
  background: var(--bg-soft); color: var(--faint); font: 800 12px/1 var(--font-sans);
}
.lab-badge-card.earned .lab-badge-mono { background: linear-gradient(135deg, var(--accent), var(--lab-violet)); color: #fff; }
.lab-badge-copy { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.lab-badge-copy strong { font-size: 12.5px; }
.lab-badge-copy span { font-size: 10.5px; color: var(--faint); }
.lab-badge-check { margin-left: auto; color: var(--green); font-weight: 800; opacity: 0; }
.lab-badge-card.earned .lab-badge-check { opacity: 1; }

/* ---------- Mission page ---------- */
.lab-mission-head { padding-bottom: 6px; }
.lab-mission-head h1 { margin-bottom: 8px; }
.lab-meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.lab-meta-chip {
  display: inline-flex; flex-wrap: wrap; align-items: center; gap: 6px; padding: 5px 9px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2);
  font-size: 11.5px; color: var(--muted);
}
.lab-meta-status {
  padding: 5px 10px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--muted); font-size: 11px; font-weight: 600;
}
.lab-meta-status.done { background: var(--green-soft); border-color: color-mix(in srgb, var(--green) 32%, transparent); color: var(--green); }
.lab-meta-status.dual { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 32%, transparent); color: var(--accent-text); }
.lab-brief {
  padding: 16px 18px; border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0; background: var(--surface-2); margin-bottom: 14px;
}
.lab-brief .lang-block p:last-child { margin-bottom: 0; }
.lab-story { font-size: 14.5px; }
.lab-goals { display: grid; gap: 7px; list-style: none; padding: 0; margin: 0; }
.lab-goals li {
  padding: 9px 12px 9px 34px; position: relative; border: 1px solid var(--border);
  border-radius: 9px; background: var(--surface);
}
.lab-goals li::before {
  content: "→"; position: absolute; left: 13px; top: 9px; color: var(--accent); font-weight: 700;
}
.lab-goals .lang-block p, .lab-diff .lang-block p, .lab-pitfalls .lang-block p { margin: 0; }
.lab-concept-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 10px; }
.lab-concept { padding: 14px 15px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); }
.lab-concept h3 { margin: 0 0 6px; font-size: 13.5px; font-family: var(--font-mono); color: var(--accent-text); }
.lab-concept-body { font-size: 12.5px; color: var(--text-soft); }
.lab-concept-body .lang-block { font-size: 12.5px; }
.lab-api-row { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
.lab-api {
  display: inline-flex; padding: 2px 6px; border: 1px solid var(--border); border-radius: 5px;
  background: var(--bg-code); color: var(--text-soft); font-size: 10.5px;
}
.lab-api code { border: 0; background: none; padding: 0; font-size: 10.5px; }
.lab-api:hover { border-color: var(--accent); text-decoration: none; }
.lab-api-muted { opacity: 0.7; }

/* ---------- Track panels and steps ---------- */
.lab-track-panels { margin-top: 16px; }
.lab-track-panel {
  padding: 18px; border: 1px solid var(--border); border-radius: 13px;
  background: var(--surface); box-shadow: var(--shadow-sm);
}
.lab-track-head { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.lab-track-version {
  padding: 3px 9px; border-radius: 20px; background: var(--accent-soft);
  color: var(--accent-text); font: 700 10.5px/1.6 var(--font-mono);
}
.lab-track-panel[data-track-panel="java"] .lab-track-version { background: var(--amber-soft); color: var(--amber); }
.lab-track-kind { font-size: 10.5px; color: var(--faint); text-transform: uppercase; letter-spacing: 0.06em; }
.lab-setup {
  padding: 10px 12px; margin-bottom: 8px; border-radius: 9px;
  background: var(--surface-2); border: 1px solid var(--border); font-size: 12.5px;
}
.lab-setup .lang-block { font-size: 12.5px; }
.lab-setup .lang-block p:last-child { margin-bottom: 0; }
.lab-step { padding: 14px 0; border-top: 1px dashed var(--border); }
.lab-step:first-of-type { border-top: 0; }
.lab-step-head { display: flex; align-items: center; gap: 9px; margin-bottom: 5px; }
.lab-step-head h3 { margin: 0; font-size: 15px; }
.lab-step-no {
  display: grid; place-items: center; flex: none; width: 25px; height: 25px; border-radius: 8px;
  background: var(--accent-soft); color: var(--accent-text); font: 700 10.5px/1 var(--font-mono);
}
.lab-step-body { font-size: 12.75px; color: var(--text-soft); }
.lab-step-body .lang-block { font-size: 12.75px; }
.lab-step-body .lang-block:last-child p:last-child { margin-bottom: 6px; }
.lab-code {
  margin: 8px 0 4px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--bg-code); overflow: hidden;
}
.lab-code-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 5px 8px 5px 11px; background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.lab-code-label { font: 600 10.5px/1.5 var(--font-mono); color: var(--muted); overflow-wrap: anywhere; }
.lab-copy {
  flex: none; padding: 3px 8px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface); color: var(--muted); font: 600 10px/1.4 var(--font-sans); cursor: pointer;
}
.lab-copy:hover { border-color: var(--accent); color: var(--accent-text); }
.lab-copy.copied { border-color: var(--green); color: var(--green); }
.lab-code pre { margin: 0; padding: 11px 13px; overflow-x: auto; background: var(--bg-code); }
.lab-code pre code { font-size: 12px; line-height: 1.62; background: none; border: 0; padding: 0; }
.lab-command { margin-top: 12px; border: 1px solid var(--border); border-radius: 9px; overflow: hidden; }
.lab-command pre { margin: 0; padding: 10px 13px; background: var(--bg-code); overflow-x: auto; }
.lab-command code { background: none; border: 0; padding: 0; font-size: 12px; }
.lab-note {
  margin-top: 12px; padding: 10px 13px; border-left: 3px solid var(--amber);
  background: var(--amber-soft); border-radius: 0 8px 8px 0; font-size: 12.5px;
}
.lab-note .lang-block p:last-child { margin-bottom: 0; }
.lab-source { margin-top: 10px; font-size: 11.5px; color: var(--faint); }
.lab-source code { font-size: 11px; }
.lab-evidence { margin-top: 14px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); }
.lab-evidence h4 { margin: 0 0 6px; font-size: 12px; color: var(--green); }
.lab-evidence ul { margin: 0; padding-left: 19px; }
.lab-evidence li { font-size: 12px; color: var(--text-soft); margin: 2px 0; }
.lab-diff, .lab-pitfalls { display: grid; gap: 7px; padding: 0; list-style: none; counter-reset: pit; }
.lab-diff li, .lab-pitfalls li {
  padding: 10px 13px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface);
  font-size: 12.75px; color: var(--text-soft);
}
.lab-pitfalls li { position: relative; padding-left: 40px; counter-increment: pit; }
.lab-pitfalls li::before {
  content: counter(pit, decimal-leading-zero); position: absolute; left: 12px; top: 10px;
  font: 700 10.5px/1.6 var(--font-mono); color: var(--red);
}
.lab-diff .lang-block, .lab-pitfalls .lang-block { font-size: 12.75px; }

/* ---------- Claim ---------- */
.lab-claim-widget { padding: 16px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); }
.lab-claim-track { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 12px; color: var(--muted); }
.lab-claim-form { display: flex; flex-wrap: wrap; gap: 8px; }
.lab-claim-form input {
  flex: 1 1 220px; min-width: 0; height: 40px; padding: 0 12px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2);
  color: var(--text); font: 600 14px/1 var(--font-mono); letter-spacing: 0.06em;
}
.lab-claim-form input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.lab-claim-form.shake { animation: lab-shake 0.4s ease; }
@keyframes lab-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.lab-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 36px; padding: 0 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface-2); color: var(--text-soft); font: 600 12.5px/1 var(--font-sans); cursor: pointer;
}
.lab-btn:hover { border-color: var(--border-strong); color: var(--text); }
.lab-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.lab-btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
html[data-lang="mixed"] .lab-page .button.primary .lang-inline.lang-en,
html[data-lang="mixed"] .lab-page .lab-btn.primary .lang-inline.lang-en { color: rgba(255, 255, 255, 0.82); }
html[data-lang="mixed"] .lab-page .button.primary .lang-inline.lang-en::before,
html[data-lang="mixed"] .lab-page .lab-btn.primary .lang-inline.lang-en::before { color: rgba(255, 255, 255, 0.55); }
.lab-btn.ghost { background: transparent; }
.lab-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.lab-btn:disabled:hover { border-color: var(--border); color: var(--text-soft); }
.lab-btn.primary:disabled:hover { border-color: var(--accent); color: #fff; }
.lab-claim-status { margin-top: 10px; font-size: 12px; color: var(--muted); }
.lab-claim-status.ok { color: var(--green); }
.lab-claim-status.warn { color: var(--red); }

/* ---------- Feynman ---------- */
.lab-feynman { padding: 16px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); }
.lab-feynman-prompt { font-size: 14px; font-weight: 500; color: var(--text); margin-bottom: 10px; }
.lab-feynman-prompt .lang-block { font-size: 14px; }
.lab-feynman-input {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface-2); color: var(--text); font: 13px/1.65 var(--font-sans); resize: vertical;
}
.lab-feynman-input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.lab-feynman-actions { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 9px; }
.lab-feynman-count { font: 600 10.5px/1 var(--font-mono); color: var(--faint); }
.lab-feynman-result { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-top: 14px; padding: 13px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2); }
.lab-feynman-result.pass { border-color: color-mix(in srgb, var(--green) 38%, var(--border)); background: linear-gradient(135deg, var(--surface-2), var(--green-soft)); }
.lab-feynman-scorebox { display: flex; align-items: baseline; gap: 3px; flex: none; }
.lab-feynman-scorebox strong { font-size: 38px; line-height: 1; letter-spacing: -0.04em; color: var(--accent-text); }
.lab-feynman-result.pass .lab-feynman-scorebox strong { color: var(--green); }
.lab-feynman-scorebox span { font: 600 12px/1 var(--font-mono); color: var(--faint); }
.lab-feynman-scorebox small { display: block; margin-left: 6px; font-size: 10.5px; color: var(--muted); }
.lab-feynman-feedback { flex: 1 1 260px; min-width: 0; }
.lab-feynman-verdict { margin: 0 0 5px; font-size: 12.5px; color: var(--text-soft); }
.lab-feynman-groups { display: flex; flex-wrap: wrap; gap: 4px; }
.lab-feynman-groups span { padding: 2px 7px; border-radius: 20px; font-size: 10.5px; border: 1px solid var(--border); background: var(--surface); color: var(--muted); }
.lab-feynman-groups span.hit { border-color: color-mix(in srgb, var(--green) 40%, transparent); background: var(--green-soft); color: var(--green); }
.lab-feynman-groups span.miss { border-color: color-mix(in srgb, var(--red) 30%, transparent); background: var(--red-soft); color: var(--red); }
.lab-feynman-metrics { margin: 7px 0 0; font-size: 10.5px; color: var(--faint); }
.lab-feynman-best { margin: 10px 0 0; font-size: 11.5px; color: var(--muted); }
.lab-model-answer { margin-top: 12px; padding: 10px 13px; border: 1px dashed var(--border-strong); border-radius: 9px; background: var(--surface-2); }
.lab-model-answer summary { cursor: pointer; font-size: 12px; font-weight: 600; color: var(--accent-text); }
.lab-model-answer .lang-block { margin-top: 8px; font-size: 12.5px; }
.lab-model-answer .lang-block p:last-child { margin-bottom: 0; }

/* ---------- Review ---------- */
.lab-review { padding: 16px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); }
.lab-review-status { font-size: 12.5px; color: var(--text-soft); }
.lab-review-status.due { color: var(--accent-text); font-weight: 600; }
.lab-review-actions { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; margin-top: 12px; }
.lab-review-actions button {
  display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2);
  color: var(--text-soft); font: 600 12px/1.2 var(--font-sans); cursor: pointer;
}
.lab-review-actions button:hover { border-color: var(--accent); color: var(--accent-text); }
.lab-review-actions button small { font: 600 10px/1.2 var(--font-mono); color: var(--faint); }
.lab-review-actions button[data-review-rate="again"]:hover { border-color: var(--red); color: var(--red); }
.lab-review-actions button[data-review-rate="easy"]:hover { border-color: var(--green); color: var(--green); }
.lab-review > .lab-btn { margin-top: 10px; }
.lab-mission-nav { margin-top: 44px; }

/* ---------- Setup page ---------- */
.lab-setup-hero {
  padding: 26px 28px; border: 1px solid var(--border); border-radius: 16px;
  background: radial-gradient(700px 260px at 0% -20%, color-mix(in srgb, var(--accent) 13%, transparent), transparent 65%), var(--surface);
}
.lab-setup-hero h1 { margin-top: 4px; }
.lab-table { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-top: 12px; }
.lab-table th, .lab-table td { padding: 8px 10px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
.lab-table th { background: var(--surface-2); font-weight: 600; color: var(--text-soft); }
.lab-table code { font-size: 11px; white-space: nowrap; }
.lab-trouble { display: grid; gap: 6px; padding: 0; list-style: none; }
.lab-trouble li { padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); font-size: 12.5px; }
.lab-security { padding: 16px 18px; border: 1px solid color-mix(in srgb, var(--amber) 34%, var(--border)); border-radius: 11px; background: var(--amber-soft); }
.lab-security h2 { border: 0; margin-top: 0; }
.lab-security li { font-size: 12.5px; }

/* ---------- Passport ---------- */
.lab-passport-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 24px; align-items: center;
  padding: 28px; border: 1px solid var(--border); border-radius: 18px;
  background:
    radial-gradient(700px 280px at 0% -20%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%),
    radial-gradient(520px 260px at 100% 120%, color-mix(in srgb, var(--lab-violet) 12%, transparent), transparent 60%),
    var(--surface);
}
.lab-passport-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(104px, 1fr)); gap: 7px; margin-top: 18px; }
.lab-passport-seal {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  aspect-ratio: 1; border-radius: 50%; border: 2px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
  background: var(--accent-soft); color: var(--accent-text);
}
.lab-passport-seal > span { font: 800 34px/1 var(--font-sans); letter-spacing: 0.02em; }
.lab-passport-seal strong { font: 800 11px/1 var(--font-sans); letter-spacing: 0.18em; }
.lab-passport-seal small {
  max-width: 82%; font-size: 9.5px; line-height: 1.4; text-align: center; color: var(--muted);
}
html[data-lang="mixed"] .lab-passport-seal small .lang-inline.lang-en { display: none; }
.lab-ladder { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 5px; }
.lab-ladder li {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px;
  border: 1px solid var(--border); border-radius: 9px; background: var(--surface);
  opacity: 0.66;
}
.lab-ladder li.current { opacity: 1; border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); background: var(--accent-soft); }
.lab-ladder li.passed { opacity: 0.9; }
.lab-ladder-dot {
  display: grid; place-items: center; flex: none; width: 24px; height: 24px; border-radius: 50%;
  background: var(--bg-soft); color: var(--faint); font: 700 10px/1 var(--font-mono);
}
.lab-ladder li.passed .lab-ladder-dot, .lab-ladder li.current .lab-ladder-dot { background: var(--accent); color: #fff; }
.lab-ladder-name { font-size: 12.5px; font-weight: 600; }
.lab-ladder-min { margin-left: auto; font: 600 10.5px/1 var(--font-mono); color: var(--faint); }
.lab-passport-table td[data-pm-python], .lab-passport-table td[data-pm-java] { font-family: var(--font-mono); font-size: 11px; }
.lab-passport-note { padding: 16px 18px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-2); }
.lab-passport-note h2 { margin-top: 0; }

/* ---------- Capstone projects ---------- */
.lab-project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; margin-top: 14px; }
.lab-project-card {
  position: relative; display: flex; flex-direction: column; gap: 7px; padding: 18px 18px 14px;
  border: 1px solid var(--border); border-radius: 13px; background: var(--surface);
  color: var(--text); box-shadow: var(--shadow-sm); overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.lab-project-card::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--lab-violet));
  opacity: 0; transition: opacity 0.2s ease;
}
.lab-project-card:hover { transform: translateY(-2px); border-color: var(--border-strong); box-shadow: var(--shadow-md); text-decoration: none; color: var(--text); }
.lab-project-card.active { border-color: color-mix(in srgb, var(--accent) 32%, var(--border)); }
.lab-project-card.active::before, .lab-project-card.done::before { opacity: 1; }
.lab-project-card.done { border-color: color-mix(in srgb, var(--green) 34%, var(--border)); }
.lab-project-card.done::before { background: linear-gradient(90deg, var(--green), var(--lab-cyan)); }
.lab-project-card.late { border-color: color-mix(in srgb, var(--amber) 40%, var(--border)); }
.lab-project-card.late::before { background: linear-gradient(90deg, var(--amber), var(--red)); }
.lab-project-card h3 { margin: 0; font-size: 18px; padding-right: 44px; }
.lab-project-spec { display: flex; flex-wrap: wrap; gap: 4px; margin: 2px 0; }
.lab-project-spec span {
  padding: 2px 7px; border-radius: 6px; background: var(--bg-soft);
  color: var(--muted); font: 600 10px/1.6 var(--font-mono);
}
.lab-project-bar { height: 4px; margin-top: 4px; border-radius: 20px; background: var(--bg-soft); overflow: hidden; }
.lab-project-bar i { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--lab-violet)); transition: width 0.4s ease; }
.lab-project-card.done .lab-project-bar i { background: linear-gradient(90deg, var(--green), var(--lab-cyan)); }
.lab-project-card.late .lab-project-bar i { background: linear-gradient(90deg, var(--amber), var(--red)); }

.lab-projects-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 26px; align-items: center;
  padding: 28px; border: 1px solid var(--border); border-radius: 18px;
  background:
    radial-gradient(760px 300px at -8% -25%, color-mix(in srgb, var(--accent) 15%, transparent), transparent 60%),
    radial-gradient(620px 300px at 108% 110%, color-mix(in srgb, var(--lab-cyan) 14%, transparent), transparent 62%),
    var(--surface);
  box-shadow: var(--shadow-sm);
}
.lab-projects-hero h1 { margin: 6px 0 14px; }
.lab-projects-hero .lede { max-width: 64ch; }
.lab-projects-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(104px, 1fr)); gap: 7px; margin-top: 18px; }
.lab-projects-seal {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  aspect-ratio: 1; border-radius: 50%; border: 2px dashed color-mix(in srgb, var(--lab-cyan) 48%, var(--border));
  background: color-mix(in srgb, var(--lab-cyan) 10%, var(--surface)); color: var(--lab-cyan);
}
.lab-projects-seal span { font: 800 34px/1 var(--font-sans); letter-spacing: 0.02em; }
.lab-projects-seal strong { font: 800 11px/1 var(--font-sans); letter-spacing: 0.18em; }
.lab-projects-seal small { max-width: 82%; font-size: 9.5px; line-height: 1.4; text-align: center; color: var(--muted); }
html[data-lang="mixed"] .lab-projects-seal small .lang-inline.lang-en { display: none; }
.lab-project-strip {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 12px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2);
  font-size: 11.5px; color: var(--muted);
}
.lab-project-strip span { padding: 2px 8px; border-right: 1px solid var(--border); }
.lab-project-strip span:last-child { border-right: 0; margin-left: auto; }
.lab-project-strip strong { color: var(--accent-text); font-family: var(--font-mono); }
.lab-rule-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 10px; margin-top: 14px; }
.lab-rule { padding: 15px 16px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); }
.lab-rule > span { font: 700 10px/1 var(--font-mono); color: var(--faint); letter-spacing: 0.08em; }
.lab-rule h3 { margin: 6px 0 5px; font-size: 14px; }
.lab-rule p { margin: 0; font-size: 12px; color: var(--text-soft); }
.lab-budget-table td, .lab-budget-table th { white-space: nowrap; }
.lab-budget-table tfoot td { background: var(--surface-2); font-weight: 600; }

/* Project page */
.lab-project-head h1 { margin-bottom: 8px; }
.lab-meta-status.active { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 32%, transparent); color: var(--accent-text); }
.lab-runner { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow-sm); overflow: hidden; }
.lab-runner-top {
  display: grid; grid-template-columns: minmax(0, 1.2fr) auto auto; gap: 18px; align-items: center;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
  background:
    radial-gradient(480px 180px at 0% -40%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%),
    var(--surface-2);
}
.lab-runner-state { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.lab-runner-kicker { font: 700 9.5px/1 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); }
.lab-runner-state strong { font-size: 20px; letter-spacing: -0.02em; }
.lab-runner-state strong .lang-inline, .lab-runner-due .lang-inline { display: inline; }
html[data-lang="mixed"] .lab-runner-state strong .lang-inline.lang-en { display: none; }
.lab-runner-state small, .lab-runner-due { font-size: 11.5px; color: var(--muted); }
.lab-runner-due.left { color: var(--accent-text); font-weight: 600; }
.lab-runner-due.ok { color: var(--green); font-weight: 600; }
.lab-runner-due.late { color: var(--amber); font-weight: 600; }
.lab-runner-clock {
  display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 7px 15px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
}
.lab-runner-clock span { font: 700 24px/1.1 var(--font-mono); letter-spacing: 0.04em; color: var(--text); }
.lab-runner-clock small { font-size: 9.5px; color: var(--faint); }
.lab-runner-xp { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
.lab-runner-xp strong { font: 700 18px/1 var(--font-mono); color: var(--accent-text); }
.lab-runner-xp span { font-size: 9.5px; color: var(--faint); }
.lab-runner-bars { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 14px 20px; border-bottom: 1px solid var(--border); }
.lab-runner-bar { display: flex; flex-direction: column; gap: 5px; font-size: 11px; color: var(--muted); }
.lab-runner-bar > span:first-child { display: flex; justify-content: space-between; gap: 8px; }
.lab-runner-bar b { color: var(--text-soft); font-family: var(--font-mono); }
.lab-bar { display: block; height: 6px; border-radius: 20px; background: var(--bg-soft); overflow: hidden; }
.lab-bar i { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--lab-violet)); transition: width 0.35s ease; }
.lab-runner-time { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 10.5px; color: var(--faint); }
.lab-runner-time b { color: var(--text-soft); font-weight: 600; }
.lab-runner-time b .lang-inline { display: inline; }
.lab-runner-actions { display: flex; flex-wrap: wrap; gap: 8px; padding: 13px 20px; }
.lab-runner-actions:empty { display: none; }
.lab-runner-finish { padding: 0 20px 18px; }
.lab-runner-finish label { display: flex; flex-direction: column; gap: 2px; margin-bottom: 7px; font-size: 12.5px; font-weight: 600; }
.lab-runner-finish label small { font-weight: 400; font-size: 10.5px; color: var(--faint); }
.lab-runner-finish textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--surface-2); color: var(--text); font: 12.5px/1.6 var(--font-sans); resize: vertical;
}
.lab-runner-finish textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.lab-runner-finish textarea:disabled { opacity: 0.6; }
.lab-runner-finish-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-top: 8px; }
.lab-runner-hint { flex: 1 1 250px; font-size: 11px; color: var(--muted); }
.lab-runner-done {
  padding: 18px 20px; border-top: 1px solid color-mix(in srgb, var(--green) 30%, var(--border));
  background: linear-gradient(135deg, var(--surface-2), var(--green-soft));
}
.lab-done-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.lab-done-head strong { font-size: 17px; color: var(--green); }
.lab-done-head span { margin-left: auto; font: 700 13px/1 var(--font-mono); color: var(--accent-text); }
.lab-done-stats { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 11px; color: var(--muted); }
.lab-done-stats b { color: var(--text-soft); font-weight: 600; }
.lab-done-stats .lang-inline { display: inline; }
.lab-done-reflection {
  margin: 12px 0 0; padding: 10px 13px; border-left: 3px solid var(--green);
  border-radius: 0 8px 8px 0; background: color-mix(in srgb, var(--surface) 72%, transparent);
  font-size: 12.5px; color: var(--text-soft); white-space: pre-wrap;
}

.lab-outcome {
  padding: 13px 16px; border: 1px solid color-mix(in srgb, var(--green) 28%, var(--border));
  border-radius: 10px; background: var(--green-soft); font-size: 13px;
}
.lab-outcome > strong { display: block; margin-bottom: 5px; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--green); }
.lab-outcome .lang-block p:last-child { margin-bottom: 0; }
.lab-milestones, .lab-deliverables { list-style: none; margin: 14px 0 0; padding: 0; display: flex; flex-direction: column; gap: 9px; counter-reset: lab-ms; }
.lab-deliverables { counter-reset: lab-dl; }
.lab-milestone, .lab-deliverable {
  position: relative; padding: 13px 15px 13px 46px; border: 1px solid var(--border);
  border-radius: 10px; background: var(--surface);
}
.lab-milestone::before, .lab-deliverable::before {
  position: absolute; left: 14px; top: 14px; font: 700 10px/1 var(--font-mono); color: var(--faint);
}
.lab-milestone { counter-increment: lab-ms; }
.lab-milestone::before { content: counter(lab-ms, decimal-leading-zero); }
.lab-deliverable { counter-increment: lab-dl; }
.lab-deliverable::before { content: "D" counter(lab-dl); }
.lab-milestone.checked, .lab-deliverable.checked {
  border-color: color-mix(in srgb, var(--green) 34%, var(--border));
  background: linear-gradient(135deg, var(--surface), var(--green-soft));
}
.lab-milestone.checked::before, .lab-deliverable.checked::before { color: var(--green); }
.lab-check-line { display: flex; align-items: flex-start; gap: 9px; cursor: pointer; font-size: 13.5px; font-weight: 600; }
.lab-check-line input { flex: none; width: 15px; height: 15px; margin-top: 3px; accent-color: var(--accent); cursor: pointer; }
.lab-check-line input:disabled { cursor: not-allowed; }
.lab-check-title { min-width: 0; }
.lab-check-title b { margin-left: 5px; padding: 1px 6px; border-radius: 5px; background: var(--bg-soft); color: var(--muted); font: 600 9.5px/1.6 var(--font-mono); }
.lab-check-title code { margin-left: 5px; font-size: 10px; }
.lab-milestone-body { margin-top: 4px; font-size: 12.5px; color: var(--text-soft); }
.lab-milestone-body .lang-block { font-size: 12.5px; margin-bottom: 3px; }
.lab-milestone-body .lang-block p { margin: 0; }
.lab-accept { margin-top: 8px; padding: 8px 10px; border-radius: 8px; background: var(--surface-2); font-size: 11.5px; color: var(--muted); }
.lab-accept > strong { margin-right: 6px; color: var(--accent-text); }
.lab-accept .lang-block { font-size: 11.5px; }
.lab-accept .lang-block p { margin: 0; }
.lab-rubric-points { font-family: var(--font-mono); font-weight: 700; color: var(--accent-text); text-align: right; white-space: nowrap; }
.lab-rubric tfoot td { background: var(--surface-2); font-weight: 600; }
.lab-project-apis { margin-top: 12px; }
.lab-project-resources { margin-top: 16px; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2); }
.lab-project-resources h3 { margin: 0 0 7px; font-size: 12.5px; color: var(--green); }
.lab-project-resources ul { margin: 0; padding-left: 18px; display: flex; flex-wrap: wrap; gap: 4px 22px; }
.lab-project-resources li { font-size: 12.5px; }
.lab-activity .act-dot.project { background: var(--green); }
.lab-activity .act-dot.project-start { background: var(--lab-cyan); }

/* ---------- Toast / confetti ---------- */
.lab-toast-host {
  position: fixed; right: 18px; bottom: 18px; z-index: 130; display: flex;
  flex-direction: column; gap: 8px; max-width: min(380px, calc(100vw - 36px)); pointer-events: none;
}
.lab-toast {
  padding: 10px 13px; border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 9px; background: var(--surface); color: var(--text-soft);
  box-shadow: var(--shadow-lg); font-size: 12.5px; animation: lab-toast-in 0.22s ease;
}
.lab-toast.success { border-left-color: var(--green); }
.lab-toast.error { border-left-color: var(--red); }
.lab-toast.info { border-left-color: var(--amber); }
.lab-toast.out { animation: lab-toast-out 0.24s ease forwards; }
@keyframes lab-toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes lab-toast-out { to { opacity: 0; transform: translateY(6px); } }
.lab-confetti { position: fixed; inset: 0; z-index: 120; pointer-events: none; overflow: hidden; }
.lab-confetti i {
  position: absolute; top: -16px; width: 8px; height: 14px; border-radius: 2px;
  animation: lab-fall 1.5s cubic-bezier(0.2, 0.6, 0.4, 1) forwards;
}
@keyframes lab-fall {
  to { transform: translateY(108vh) rotate(540deg); opacity: 0; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .lab-hero { grid-template-columns: 1fr; }
  .lab-level-card { flex-direction: row; align-items: center; flex-wrap: wrap; }
  .lab-ring { margin: 0; width: 124px; height: 124px; }
  .lab-hero-stats { flex: 1 1 220px; }
  .lab-level-progress { flex: 1 1 100%; }
  .lab-passport-hero { grid-template-columns: 1fr; }
  .lab-passport-seal { width: 150px; margin: 0 auto; }
  .lab-projects-hero { grid-template-columns: 1fr; }
  .lab-projects-seal { width: 150px; margin: 0 auto; }
}
@media (max-width: 860px) {
  .lab-next { flex-direction: column; align-items: flex-start; }
  .lab-next-badge { width: 58px; height: 58px; border-radius: 18px; font-size: 23px; }
  .lab-two-col { grid-template-columns: 1fr; }
  .lab-track-panel { padding: 14px; }
  .lab-runner-top { grid-template-columns: 1fr auto; }
  .lab-runner-state { grid-column: 1 / -1; }
  .lab-runner-bars { grid-template-columns: 1fr; }
  .lab-budget-table, .lab-passport-table { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (max-width: 640px) {
  .lab-hero, .lab-setup-hero, .lab-passport-hero, .lab-projects-hero { padding: 18px; border-radius: 14px; }
  .lab-mission-grid, .lab-project-grid, .lab-rule-grid { grid-template-columns: 1fr; }
  .lab-mission-card h3, .lab-project-card h3 { font-size: 17px; }
  .lab-hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-review-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-feynman-result { flex-direction: column; align-items: flex-start; }
  .lab-feynman-scorebox strong { font-size: 32px; }
  .lab-claim-form input { flex-basis: 100%; }
  .lab-claim-form .lab-btn { width: 100%; }
  .lab-mission-card, .lab-project-card { padding: 15px; }
  .lab-code pre code { font-size: 11.5px; }
  .lab-section { margin-top: 32px; }
  .lab-passport-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lab-table { display: block; overflow-x: auto; white-space: nowrap; }
  .lab-runner-top { grid-template-columns: 1fr; gap: 12px; padding: 15px; }
  .lab-runner-clock { align-items: flex-start; padding: 8px 12px; }
  .lab-runner-clock span { font-size: 22px; }
  .lab-runner-xp { align-items: flex-start; }
  .lab-runner-bars, .lab-runner-actions, .lab-runner-finish, .lab-runner-done { padding-left: 15px; padding-right: 15px; }
  .lab-runner-time { gap: 4px 12px; }
  .lab-project-strip span:last-child { margin-left: 0; }
  .lab-done-stats { flex-direction: column; }
  .lab-milestone, .lab-deliverable { padding-left: 38px; }
}
@media (prefers-reduced-motion: reduce) {
  .lab-mission-card, .lab-skill-bar i, .lab-ring-fg, .lab-level-bar i { transition: none !important; }
  .lab-toast, .lab-toast.out, .lab-confetti i { animation: none !important; }
}
@media print {
  .lab-actions, .lab-track-switch, .lab-filters, .lab-claim-widget,
  .lab-feynman-actions, .lab-review-actions, .lab-runner-actions,
  .lab-runner-finish, .lab-toast-host, .lab-confetti { display: none !important; }
  .lab-hero, .lab-passport-hero, .lab-projects-hero, .lab-section { break-inside: avoid; }
}