:root {
  color-scheme: dark;
  --stc-bg: #020617;
  --stc-panel: #0f172a;
  --stc-panel-2: #111827;
  --stc-border: rgba(56, 189, 248, 0.24);
  --stc-border-soft: rgba(148, 163, 184, 0.22);
  --stc-cyan: #38bdf8;
  --stc-blue: #93c5fd;
  --stc-gold: #facc15;
  --stc-text: #f8fafc;
  --stc-muted: #dbeafe;
  --stc-soft: #bfdbfe;
  --stc-danger: #fb7185;
  --stc-safe: #4ade80;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.16), transparent 34%),
    radial-gradient(circle at top right, rgba(250, 204, 21, 0.08), transparent 30%),
    var(--stc-bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background: transparent;
  color: var(--stc-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--stc-cyan);
}

.lab-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 72px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--stc-cyan);
  font-weight: 800;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.lab-hero,
.lab-panel,
.lab-toc {
  background: rgba(15, 23, 42, 0.94);
  border: 1px solid var(--stc-border);
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(2, 6, 23, 0.42);
}

.lab-hero {
  padding: 42px;
  margin-bottom: 24px;
}

.lab-hero-kicker {
  color: var(--stc-cyan);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.lab-hero h1 {
  margin: 0 0 18px;
  max-width: 980px;
  color: #ffffff;
  font-size: clamp(2.4rem, 5vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.lab-hero p {
  max-width: 980px;
  color: var(--stc-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.lab-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.lab-meta-grid div {
  border: 1px solid var(--stc-border-soft);
  border-radius: 16px;
  padding: 16px;
  background: rgba(2, 6, 23, 0.42);
}

.lab-meta-grid span {
  display: block;
  color: var(--stc-blue);
  font-size: 0.78rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.lab-meta-grid strong {
  display: block;
  color: #ffffff;
  font-size: 1rem;
}

.lab-toc {
  padding: 20px 24px;
  margin: 0 0 24px;
}

.mobile-study-menu-title {
  margin: 0 0 10px;
  color: var(--stc-gold);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lab-toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.lab-toc a {
  display: inline-flex;
  padding: 9px 13px;
  border: 1px solid var(--stc-border-soft);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.38);
  color: var(--stc-muted);
  font-weight: 800;
  text-decoration: none;
}

.lab-toc a:hover {
  border-color: var(--stc-cyan);
  color: #ffffff;
}

.lab-panel {
  padding: 34px;
  margin-top: 24px;
}

.lab-panel h2 {
  margin: 0 0 22px;
  color: #ffffff;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  letter-spacing: -0.04em;
}

.lab-panel h3 {
  color: #ffffff;
}

.lab-panel p,
.lab-panel li,
.lab-panel summary {
  color: var(--stc-muted);
}

.lab-panel details {
  border: 1px solid var(--stc-border-soft);
  border-radius: 16px;
  padding: 16px 18px;
  background: rgba(2, 6, 23, 0.34);
  margin: 12px 0;
}

.lab-panel summary {
  cursor: pointer;
  font-weight: 900;
}

.artifact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.artifact-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--stc-border);
  background: rgba(2, 6, 23, 0.46);
  color: var(--stc-muted);
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.artifact-card:hover {
  border-color: rgba(56, 189, 248, 0.62);
  background: rgba(8, 47, 73, 0.44);
  transform: translateY(-1px);
}

.artifact-card strong {
  color: #ffffff;
  font-size: 1.04rem;
  line-height: 1.35;
}

.artifact-card span {
  color: var(--stc-soft);
  line-height: 1.5;
}

/* Red Team visual model diagrams */
.visual-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.flow-step {
  width: 100%;
  padding: 16px 20px;
  border-radius: 14px;
  border: 1px solid rgba(56, 189, 248, 0.28);
  background:
    linear-gradient(135deg, rgba(8, 47, 73, 0.88), rgba(15, 23, 42, 0.92));
  color: #ffffff;
  font-weight: 900;
  text-align: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.flow-arrow {
  color: var(--stc-blue);
  text-align: center;
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1;
}

/* Red Team anti-pattern comparison cards */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.unsafe,
.safe {
  border-radius: 18px;
  padding: 22px;
  border: 1px solid var(--stc-border-soft);
}

.unsafe {
  background: rgba(127, 29, 29, 0.28);
  border-color: rgba(251, 113, 133, 0.55);
}

.safe {
  background: rgba(20, 83, 45, 0.26);
  border-color: rgba(74, 222, 128, 0.52);
}

.unsafe h3,
.safe h3 {
  margin-top: 0;
  color: #ffffff;
}

.unsafe li,
.safe li {
  color: var(--stc-muted);
}

/* Governance tables */
.boundary-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 22px;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--stc-border-soft);
}

.boundary-table th {
  background: rgba(8, 47, 73, 0.72);
  color: #ffffff;
  text-align: left;
  padding: 14px 16px;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.boundary-table td {
  border-top: 1px solid var(--stc-border-soft);
  color: var(--stc-muted);
  padding: 14px 16px;
}

.badge-false {
  color: var(--stc-danger) !important;
  font-weight: 900;
}

.badge-true {
  color: var(--stc-safe) !important;
  font-weight: 900;
}

.lab-panel pre {
  overflow-x: auto;
  border-radius: 16px;
  padding: 18px;
  background: rgba(2, 6, 23, 0.78);
  border: 1px solid var(--stc-border-soft);
  color: var(--stc-muted);
}

.lab-panel code {
  color: var(--stc-muted);
}

@media (max-width: 780px) {
  .lab-shell {
    padding: 22px 14px 56px;
  }

  .lab-hero,
  .lab-panel,
  .lab-toc {
    padding: 24px;
    border-radius: 18px;
  }

  .lab-meta-grid,
  .artifact-grid,
  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .lab-hero h1 {
    font-size: clamp(2.2rem, 12vw, 3.7rem);
  }

  .lab-toc ul {
    flex-direction: column;
  }
}