/* =============================================================================
   WORKSPACE PANELS — the landing page's look carried into the left and right
   panels of the canvas (Practice / Learn / Evaluate share them).
   Rules: panel backgrounds and font families/sizes are untouched (white panel,
   existing type scale). What changes is the landing's language on top:
   hairline borders, one blue accent with a soft glow, HUD corner brackets,
   letter-spaced status labels, and glowing state rails instead of flat fills.
   Scoped by <html class="ws-header">; loaded after the canvas bundle.
============================================================================= */
.ws-header {
  --wp-accent: #2563eb;
  --wp-accent-2: #3b82f6;
  --wp-glow: rgba(37, 99, 235, 0.35);
  --wp-ring: rgba(37, 99, 235, 0.12);
  --wp-line: rgba(15, 23, 42, 0.08);
  --wp-line-2: rgba(15, 23, 42, 0.14);
  --wp-ink: #0f172a;
  --wp-muted: #64748b;
  --wp-dim: #94a3b8;
}

/* ─── Panel shell: hairline edge, soft blue lift, glowing top seam ─────────── */
.ws-header #left-panel.panel,
.ws-header #right-panel.panel {
  border-color: var(--wp-line);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 12px 32px -18px rgba(37, 99, 235, 0.28);
}
@media (min-width: 900px) {
  .ws-header #left-panel.panel::after,
  .ws-header #right-panel.panel::after {
    content: '';
    position: absolute;
    top: 0; left: 12%; right: 12%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.55) 50%, transparent);
    pointer-events: none;
    z-index: 3;
  }
}

/* Collapse buttons: the landing's ghost button (Help / Watch the demo) */
.ws-header #left-panel .panel-header .icon-button,
.ws-header #right-panel .panel-header .icon-button {
  background: #ffffff;
  border: 1px solid var(--wp-line-2);
  color: #334155;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}
.ws-header #left-panel .panel-header .icon-button:hover,
.ws-header #right-panel .panel-header .icon-button:hover {
  background: #ffffff;
  border-color: var(--wp-accent-2);
  color: var(--wp-accent);
  box-shadow: 0 0 0 3px var(--wp-ring);
}

/* ─── Right panel tabs: no dividers, glowing underline like the navbar ─────── */
.ws-header #right-panel .prp-tab + .prp-tab::before { content: none; }
.ws-header #right-panel .prp-tab { color: var(--wp-muted); }
.ws-header #right-panel .prp-tab:hover { color: var(--wp-ink); }
.ws-header #right-panel .prp-tab.active { color: var(--wp-accent); }

/* ─── Scenario chips: hairline buttons; the active one glows in its colour
       and gets the landing's HUD corner brackets ─────────────────────────── */
.ws-header .sim-scenario-bar { border-bottom-color: var(--wp-line); padding-left: 4px; padding-right: 4px; }
.ws-header .sim-scenario-btn { --sc: #3b82f6; --sc-glow: rgba(59, 130, 246, 0.35); position: relative; }
.ws-header .sim-scenario-btn[data-sc="spike"]   { --sc: #f59e0b; --sc-glow: rgba(245, 158, 11, 0.35); }
.ws-header .sim-scenario-btn[data-sc="failure"] { --sc: #ef4444; --sc-glow: rgba(239, 68, 68, 0.32); }
.ws-header .sim-scenario-btn[data-sc="global"]  { --sc: #0ea5e9; --sc-glow: rgba(14, 165, 233, 0.32); }
.ws-header .sim-scenario-btn[data-sc="async"]   { --sc: #14b8a6; --sc-glow: rgba(20, 184, 166, 0.32); }
.ws-header .sim-scenario-btn[data-sc="global"] .ssb-icon { color: #0ea5e9; }

.ws-header .sim-scenario-btn {
  border-color: var(--wp-line-2);
  transition: border-color 140ms ease, box-shadow 160ms ease, transform 100ms ease;
}
.ws-header .sim-scenario-btn:hover {
  border-color: var(--sc);
  box-shadow: 0 6px 16px -10px var(--sc-glow);
}
.ws-header .sim-scenario-btn.active {
  border-color: var(--sc);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--sc) 12%, transparent), 0 8px 20px -10px var(--sc-glow);
}
.ws-header .sim-scenario-btn[data-sc="global"].active { background: #f0f9ff; }
.ws-header .sim-scenario-btn[data-sc="global"].active .ssb-icon  { color: #0284c7; }
.ws-header .sim-scenario-btn[data-sc="global"].active .ssb-label { color: #0369a1; }
.ws-header .sim-scenario-btn.active::before,
.ws-header .sim-scenario-btn.active::after {
  content: '';
  position: absolute;
  width: 7px; height: 7px;
  border: 0 solid var(--sc);
  pointer-events: none;
}
.ws-header .sim-scenario-btn.active::before { top: 3px; left: 3px; border-top-width: 1.5px; border-left-width: 1.5px; }
.ws-header .sim-scenario-btn.active::after  { bottom: 3px; right: 3px; border-bottom-width: 1.5px; border-right-width: 1.5px; }

/* ─── Section labels: letter-spaced status text with an accent tick and a
       fading seam, like "DATABASE SATURATED" on the landing ───────────────── */
.ws-header #right-panel .sim-section > .sim-section-hd:not(summary) {
  align-items: center;
  gap: 8px;
  letter-spacing: 0.1em;
  color: var(--wp-muted);
}
.ws-header #right-panel .sim-section > .sim-section-hd:not(summary)::before {
  content: '';
  width: 3px; height: 12px;
  border-radius: 2px;
  background: var(--wp-accent-2);
  box-shadow: 0 0 6px var(--wp-glow);
  flex: none;
}
.ws-header #right-panel .sim-section > .sim-section-hd:not(summary)::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--wp-line-2), transparent);
}
.ws-header #right-panel .sim-hd-note { margin-left: 0; letter-spacing: 0.02em; }

/* ─── Event / finding cards: tints unchanged, soft lift on hover ──────────── */
.ws-header .sim-event { transition: box-shadow 160ms ease; }
.ws-header .sim-event:hover { box-shadow: 0 8px 20px -14px rgba(15, 23, 42, 0.35); }

/* ─── Interview question card: no side rail, blue icon + HUD brackets (no purple) ──────── */
.ws-header .sim-challenge {
  position: relative;
  border: 1px solid var(--wp-line);
}
.ws-header .sim-challenge::before,
.ws-header .sim-challenge::after {
  content: '';
  position: absolute;
  width: 9px; height: 9px;
  border: 0 solid var(--wp-accent-2);
  pointer-events: none;
}
.ws-header .sim-challenge::before { top: 4px; right: 4px; border-top-width: 1.5px; border-right-width: 1.5px; }
.ws-header .sim-challenge::after  { bottom: 4px; right: 4px; border-bottom-width: 1.5px; border-right-width: 1.5px; }
.ws-header .sim-challenge-icon {
  background: var(--wp-accent-2);
  box-shadow: 0 0 0 3px var(--wp-ring), 0 0 10px var(--wp-glow);
}
.ws-header .sim-challenge-icon svg { display: block; width: 14px; height: 14px; flex: none; }

/* ─── Problem tab ──────────────────────────────────────────────────────────── */
.ws-header #right-panel .prp-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.1em;
  color: var(--wp-ink);
  border-bottom-color: var(--wp-line);
}
.ws-header #right-panel .prp-section-title::before {
  content: '';
  width: 3px; height: 12px;
  border-radius: 2px;
  background: var(--wp-accent-2);
  box-shadow: 0 0 6px var(--wp-glow);
  flex: none;
}
.ws-header #right-panel .prp-constraint-item::before {
  content: '';
  display: inline-block;
  width: 5px; height: 5px;
  margin: 0 10px 2px 2px;
  vertical-align: middle;
  background: var(--wp-accent-2);
  box-shadow: 0 0 6px var(--wp-glow);
  transform: rotate(45deg);
}
.ws-header #right-panel .prp-testcase-card {
  position: relative;
  border: 1px solid var(--wp-line);
  border-radius: 8px;
  padding: 10px 12px;
}
.ws-header #right-panel .prp-testcase-card:hover {
  background: #ffffff;
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: 0 0 0 3px var(--wp-ring), 0 10px 24px -16px var(--wp-glow);
}
.ws-header #right-panel .prp-tc-input { border-top-color: var(--wp-line); }

/* ─── Left panel ───────────────────────────────────────────────────────────── */
.ws-header #left-panel .panel-header { border-bottom-color: var(--wp-line); }
.ws-header #left-panel.lp-v2 .lp2-search {
  background: #ffffff;
  border-color: var(--wp-line-2);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}
.ws-header #left-panel.lp-v2 .lp2-search:focus-within {
  border-color: var(--wp-accent-2);
  box-shadow: 0 0 0 3px var(--wp-ring), 0 0 14px -4px var(--wp-glow);
}
.ws-header #left-panel.lp-v2 .lp2-group-h { letter-spacing: 0.1em; }
.ws-header #left-panel.lp-v2 .lp2-group-h .lp2-count {
  padding: 1px 6px;
  border: 1px solid var(--wp-line);
  border-radius: 999px;
}
.ws-header #left-panel.lp-v2 .components-section .palette-item { position: relative; }
.ws-header #left-panel.lp-v2 .components-section .palette-item:hover,
.ws-header #left-panel.lp-v2 .components-section .palette-item:focus-visible {
  border-color: rgba(59, 130, 246, 0.28);
  box-shadow: 0 6px 16px -12px var(--wp-glow);
}
.ws-header #left-panel.lp-v2 .components-section .palette-item:hover .icon { color: var(--wp-accent); }
.ws-header #left-panel.lp-v2 .lp2-head { border-bottom-color: var(--wp-line); }
.ws-header #left-panel.lp-v2 .lp2-sec { border-bottom-color: var(--wp-line); }
.ws-header #left-panel.lp-v2 .lp2-sec-h { letter-spacing: 0.1em; }
.ws-header #left-panel.lp-v2 .lp2-back {
  background: #ffffff;
  border: 1px solid var(--wp-line-2);
}
.ws-header #left-panel.lp-v2 .lp2-back:hover {
  background: #ffffff;
  border-color: var(--wp-accent-2);
  color: var(--wp-accent);
  box-shadow: 0 0 0 3px var(--wp-ring);
}
.ws-header #left-panel.lp-v2 .lp2-tgl input:checked + span {
  box-shadow: 0 0 8px var(--wp-glow);
}

/* Teaching insight cards: no coloured left rail, a full hairline border instead */
.ws-header .sim-insight.ins--fails,
.ws-header .sim-insight.ins--works,
.ws-header .sim-insight.ins--tradeoff,
.ws-header .sim-insight.ins--scaling { border: 1px solid var(--wp-line); }