/* ==========================================================================
   RISKOS — LEARN & LAB QUANTITATIVE LABORATORY STYLESHEET
   Pixel-precise, zero-overlap, cinematic dark institutional aesthetic.
   Seamless extension of index.html & styles.css with full vertical scrollability.
   ========================================================================== */

/* ── Global Layout Resets & Natural Scroll Protection ──────────────────────── */
html, body {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
  background: #000000;
  color: var(--text, #ffffff);
  font-family: var(--font-sans, "Inter", sans-serif);
}

body.learn-page {
  min-height: 100vh;
  min-height: 100dvh;
  height: auto !important;
  overflow-x: hidden !important;
  overflow-y: auto !important;
  position: relative;
}

.learn-page-shell {
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.learn-container {
  width: min(100% - 32px, 1180px);
  margin-inline: auto;
  margin-bottom: 48px;
  display: flex;
  flex-direction: column;
  gap: 28px;
  flex: 1 0 auto;
}

/* ── Header Sticky Styling ─────────────────────────────────────────────────── */
header.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ── Defensive Logo Containment ───────────────────────────────────────────── */
.logo-btn {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  width: 36px !important;
  height: 36px !important;
  max-width: 36px !important;
  max-height: 36px !important;
  background: #09090c;
  border: 1px solid rgba(81, 207, 102, 0.25);
  border-radius: 9px;
  flex-shrink: 0 !important;
  overflow: hidden !important;
}

.logo-btn img,
.logo-img {
  width: 34px !important;
  height: 34px !important;
  max-width: 34px !important;
  max-height: 34px !important;
  object-fit: contain !important;
  border-radius: 7px;
  display: block !important;
  flex-shrink: 0 !important;
}

.lab-footer-brand img {
  width: 28px !important;
  height: 28px !important;
  max-width: 28px !important;
  max-height: 28px !important;
  object-fit: contain !important;
  border-radius: 6px;
  display: inline-block !important;
  vertical-align: middle;
  flex-shrink: 0 !important;
}

/* ── Compact Hero Section ─────────────────────────────────────────────────── */
.lab-hero-section {
  padding: clamp(24px, 4vw, 44px) 16px clamp(12px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.lab-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan, #22d3ee);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 3px 10px;
  border-radius: var(--radius-full, 9999px);
}

.lab-hero-title {
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: #ffffff;
  margin: 0;
}

.lab-hero-subtitle {
  font-size: clamp(0.85rem, 1.5vw, 1rem);
  color: var(--text-secondary, #a1a1aa);
  max-width: 620px;
  line-height: 1.5;
  margin: 0;
}

/* ── AI Lab Query Bar ─────────────────────────────────────────────────────── */
.lab-query-bar-wrap {
  width: 100%;
  max-width: 680px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lab-query-input-box {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  background: rgba(18, 18, 22, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-full, 9999px);
  padding: 4px 6px 4px 16px;
  transition: all var(--motion-fast, 140ms);
}

.lab-query-input-box:focus-within {
  border-color: var(--accent-cyan, #22d3ee);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
}

.lab-query-icon {
  color: var(--accent-cyan, #22d3ee);
  font-size: 0.9rem;
  margin-right: 10px;
}

.lab-query-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #ffffff;
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 0.875rem;
  outline: none;
}

.lab-query-input::placeholder {
  color: var(--text-muted, #71717a);
}

.lab-query-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--motion-fast, 140ms);
}

.lab-query-btn:hover {
  background: var(--accent-cyan, #22d3ee);
  color: #000;
  border-color: var(--accent-cyan, #22d3ee);
}

/* Prompt Chips */
.lab-prompt-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.lab-chip {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border-subtle, rgba(255, 255, 255, 0.05));
  color: var(--text-muted, #71717a);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  transition: all var(--motion-fast, 140ms);
  white-space: nowrap;
}

.lab-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.18);
}

/* ── Horizontal Category Navigation Pill Bar ─────────────────────────────── */
.lab-nav-pill-bar {
  display: flex;
  justify-content: center;
  padding: 0 16px;
  margin: 8px auto 10px;
  max-width: 100%;
}

.lab-nav-pill-track {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(14, 14, 18, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-full, 9999px);
  padding: 4px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -ms-overflow-style: none;
  max-width: 100%;
}

.lab-nav-pill-track::-webkit-scrollbar {
  display: none;
}

.lab-cat-pill {
  background: transparent;
  border: none;
  color: var(--text-secondary, #a1a1aa);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  padding: 6px 14px;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  transition: all var(--motion-fast, 140ms);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.lab-cat-pill:hover {
  color: #ffffff;
}

.lab-cat-pill.active {
  background: #ffffff;
  color: #000000;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.2);
}

/* ── Top Modules Quick-Switcher Bar ──────────────────────────────────────── */
.lab-top-modules-bar {
  width: min(100% - 32px, 1180px);
  margin: 0 auto 20px;
  display: flex;
  flex-direction: column;
}

.lab-top-modules-track {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
  max-width: 100%;
}

.lab-top-modules-track::-webkit-scrollbar {
  height: 4px;
}

.lab-top-modules-track::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.top-module-pill {
  flex-shrink: 0;
  background: rgba(14, 14, 18, 0.9);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-full, 9999px);
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary, #a1a1aa);
  cursor: pointer;
  transition: all var(--motion-fast, 140ms);
  white-space: nowrap;
}

.top-module-pill:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateY(-1px);
}

.top-module-pill.active {
  color: #000000;
  background: var(--accent-cyan, #22d3ee);
  border-color: var(--accent-cyan, #22d3ee);
  font-weight: 700;
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.35);
}

.top-module-pill .top-pill-icon {
  font-size: 0.75rem;
  color: var(--accent-cyan, #22d3ee);
}

.top-module-pill.active .top-pill-icon {
  color: #000000;
}

.top-module-pill .top-pill-badge {
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(34, 211, 238, 0.12);
  color: var(--accent-cyan, #22d3ee);
  padding: 2px 6px;
  border-radius: var(--radius-full, 9999px);
}

.top-module-pill.active .top-pill-badge {
  background: rgba(0, 0, 0, 0.25);
  color: #000000;
}

/* ── Module Header & Action Bar ─────────────────────────────────────────── */
.lab-module-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  background: #09090c;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-xl, 20px);
  padding: 20px 24px;
}

.module-header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.concept-category-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan, #22d3ee);
}

.concept-title {
  font-size: clamp(1.25rem, 2.5vw, 1.85rem);
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin: 0;
}

.concept-lead-text {
  font-size: 0.85rem;
  color: var(--text-secondary, #a1a1aa);
  margin: 0;
}

/* Action Bar Buttons */
.lab-action-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.lab-act-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  color: var(--text-secondary, #a1a1aa);
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--motion-fast, 140ms);
}

.lab-act-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
}

.lab-act-btn.primary {
  background: var(--accent-cyan, #22d3ee);
  color: #000000;
  font-weight: 700;
  border-color: var(--accent-cyan, #22d3ee);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.35);
}

.lab-act-btn.primary:hover {
  background: #38bdf8;
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
}

/* ── 4 Continuous Step Cards (Normal Document Flow) ──────────────────────── */
.lab-step-card {
  background: #09090c;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-xl, 20px);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
}

.step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid var(--panel-border-subtle, rgba(255, 255, 255, 0.04));
  padding-bottom: 12px;
}

.step-badge {
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan, #22d3ee);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  padding: 3px 8px;
  border-radius: var(--radius-full, 9999px);
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

/* ── Step 1: Intuition Grid ───────────────────────────────────────────────── */
.intuition-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  align-items: start;
}

.intuition-text-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.understand-lead-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.5;
  margin: 0;
}

.understand-body-text {
  font-size: 0.875rem;
  color: var(--text-secondary, #a1a1aa);
  line-height: 1.6;
  margin: 0;
}

.why-matters-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border-subtle, rgba(255, 255, 255, 0.04));
  border-left: 3px solid var(--accent-cyan, #22d3ee);
  border-radius: var(--radius-md, 10px);
  padding: 16px;
}

.why-matters-tag {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-cyan, #22d3ee);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.why-matters-box p {
  font-size: 0.85rem;
  color: var(--text-secondary, #a1a1aa);
  line-height: 1.5;
  margin: 0;
}

.intuition-stat-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 30%, rgba(34, 211, 238, 0.1), transparent 70%), #060608;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-lg, 14px);
  padding: 24px 16px;
  text-align: center;
}

.focal-symbol {
  font-family: var(--font-display, monospace);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-cyan, #22d3ee);
  letter-spacing: -0.02em;
}

.focal-value {
  font-family: var(--font-mono, monospace);
  font-size: 1.75rem;
  font-weight: 800;
  color: #ffffff;
  margin: 4px 0;
}

.focal-label {
  font-size: 0.75rem;
  color: var(--text-muted, #71717a);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mode-depth-indicator {
  margin-top: 14px;
  font-size: 0.7rem;
  color: var(--text-muted, #71717a);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 8px;
  width: 100%;
}

.mode-depth-indicator strong {
  color: var(--accent-cyan, #22d3ee);
}

/* ── Step 2: Interactive Simulator ────────────────────────────────────────── */
.sim-source-toggle {
  display: flex;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  padding: 3px;
  border-radius: var(--radius-full, 9999px);
}

.sim-source-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary, #a1a1aa);
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 4px 12px;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  transition: all var(--motion-fast, 140ms);
}

.sim-source-btn.active {
  background: #ffffff;
  color: #000000;
  font-weight: 700;
}

.sim-real-security-bar {
  display: none;
  align-items: center;
  gap: 10px;
  background: #060608;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  padding: 8px 14px;
  border-radius: var(--radius-md, 10px);
}

.sim-real-security-bar.active {
  display: flex;
}

.sim-security-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #ffffff;
  font-family: var(--font-sans, "Inter", sans-serif);
  font-size: 0.85rem;
  outline: none;
}

.preset-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sim-workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 24px;
  align-items: start;
}

.sim-controls-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sim-control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sim-control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-secondary, #a1a1aa);
}

.sim-control-val {
  font-family: var(--font-mono, monospace);
  font-weight: 700;
  color: var(--accent-cyan, #22d3ee);
}

.sim-range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full, 9999px);
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  transition: all var(--motion-fast, 140ms);
}

.sim-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan, #22d3ee);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
  border: 2px solid #000;
}

.sim-chart-wrapper {
  background: #060608;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-lg, 14px);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sim-chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sim-chart-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary, #a1a1aa);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.lab-badge {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-cyan, #22d3ee);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  padding: 2px 6px;
  border-radius: var(--radius-full, 9999px);
}

.sim-chart-canvas-box {
  position: relative;
  width: 100%;
  min-width: 0;
  height: clamp(260px, 36vw, 420px);
  overflow: hidden;
}

.sim-result-box {
  background: rgba(34, 211, 238, 0.04);
  border: 1px solid rgba(34, 211, 238, 0.25);
  border-radius: var(--radius-md, 10px);
  padding: 14px 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.sim-result-icon {
  color: var(--accent-emerald, #51cf66);
  font-size: 1.1rem;
  margin-top: 2px;
}

.sim-result-text {
  font-size: 0.875rem;
  color: #ffffff;
  line-height: 1.55;
}

/* ── Step 3: Mathematical Proofs ─────────────────────────────────────────── */
.toggle-math-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  color: var(--text-secondary, #a1a1aa);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full, 9999px);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--motion-fast, 140ms);
}

.toggle-math-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.math-proof-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.equation-card {
  background: #060608;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-lg, 14px);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  max-width: 100%;
}

.equation-card-title {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-cyan, #22d3ee);
}

.equation-wrapper {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm, 6px);
  padding: 16px;
  overflow-x: auto;
  overflow-y: hidden;
  text-align: center;
  min-width: 0;
  max-width: 100%;
}

.equation-wrapper mjx-container {
  margin: 0 !important;
  font-size: 1.1rem !important;
}

.substituted-calc-wrapper {
  background: rgba(34, 211, 238, 0.04);
  border: 1px solid rgba(34, 211, 238, 0.25);
}

.math-deep-proof-box {
  background: #060608;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-md, 10px);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.deep-proof-header {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-cyan, #22d3ee);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.deep-proof-content {
  font-size: 0.825rem;
  color: var(--text-secondary, #a1a1aa);
  line-height: 1.6;
}

/* ── Step 4: Boundaries & Limitations ────────────────────────────────────── */
.limitations-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
  align-items: start;
}

.limitations-alert-box {
  background: rgba(255, 107, 107, 0.04);
  border-left: 3px solid var(--accent-red, #FF6B6B);
  border-radius: var(--radius-md, 10px);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.limitations-alert-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-red, #FF6B6B);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.limitations-text {
  font-size: 0.85rem;
  color: #e4e4e7;
  line-height: 1.55;
  margin: 0;
}

.key-takeaways-box {
  background: rgba(81, 207, 102, 0.04);
  border-left: 3px solid var(--accent-emerald, #51cf66);
  border-radius: var(--radius-md, 10px);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.takeaways-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-emerald, #51cf66);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.takeaways-text {
  font-size: 0.85rem;
  color: #e4e4e7;
  line-height: 1.55;
  margin: 0;
}

/* ── 5. All 18 Laboratory Modules Directory ──────────────────────────────── */
.lab-all-modules-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modules-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.modules-section-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin: 4px 0 0;
}

.all-modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.module-card-item {
  background: rgba(14, 14, 18, 0.85);
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-lg, 14px);
  padding: 16px;
  cursor: pointer;
  transition: all var(--motion-fast, 140ms);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.module-card-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(34, 211, 238, 0.12);
}

.module-card-item.active {
  border-color: var(--accent-cyan, #22d3ee);
  background: rgba(34, 211, 238, 0.08);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.2);
}

.card-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-tag {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan, #22d3ee);
}

.card-icon {
  color: var(--text-muted, #71717a);
  font-size: 0.8rem;
}

.card-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.card-formula {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  color: var(--text-muted, #71717a);
  background: rgba(0, 0, 0, 0.4);
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── 6. Saved Experiments & Comparisons ──────────────────────────────────── */
.lab-saved-section {
  background: #09090c;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-xl, 20px);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.saved-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.saved-scenarios-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

.saved-scenario-card {
  background: #060608;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md, 10px);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scenario-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── 7. Minimal Institutional Footer ─────────────────────────────────────── */
.lab-footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.95);
  padding: 32px 20px;
}

.lab-footer-inner {
  width: min(100% - 32px, 1180px);
  margin-inline: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.lab-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #ffffff;
}

.lab-footer-shortcuts {
  display: flex;
  align-items: center;
  gap: 12px;
}

.shortcut-item {
  font-size: 0.7rem;
  color: var(--text-muted, #71717a);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.shortcut-item kbd {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 1px 5px;
  border-radius: 3px;
  color: #ffffff;
  font-family: inherit;
}

.lab-footer-meta {
  font-size: 0.7rem;
  color: var(--text-muted, #71717a);
}

/* ── Slide-Over Drawer Controller ────────────────────────────────────────── */
.lab-drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 25000;
  display: flex;
  justify-content: flex-end;
}

.lab-drawer-overlay[hidden] {
  display: none !important;
}

.lab-drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.lab-drawer-panel {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 100%;
  background: #09090c;
  border-left: 1px solid var(--panel-border, rgba(255, 255, 255, 0.08));
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 20px;
  overflow-y: auto;
  z-index: 2;
}

.lab-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 14px;
}

.lab-drawer-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lab-drawer-close {
  background: transparent;
  border: none;
  color: var(--text-muted, #71717a);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.lab-drawer-close:hover {
  color: #ffffff;
}

.lab-drawer-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── Mobile Overlay & Sheet Protection ───────────────────────────────────── */
.lab-mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 30000;
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 20px;
}

.lab-mobile-menu-overlay[hidden] {
  display: none !important;
}

/* ── Responsive Adaptations ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sim-workspace-grid,
  .math-proof-grid,
  .intuition-grid,
  .limitations-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .lab-hero-section {
    padding: 20px 16px 12px;
  }
  .lab-step-card {
    padding: 16px;
  }
  .lab-module-header {
    padding: 16px;
  }
}

/* ── Structured Mastery Curriculum (Layman & Professional) ─────────────────── */
.structured-curriculum-section {
  width: 100%;
  box-sizing: border-box;
}

.curriculum-container {
  background: rgba(10, 14, 26, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  box-sizing: border-box;
}

.curriculum-card {
  background: rgba(14, 18, 30, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-sizing: border-box;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.curriculum-card:hover {
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6), 0 0 12px rgba(34, 211, 238, 0.1);
}

.curriculum-step-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s ease;
  box-sizing: border-box;
}

.curriculum-step-item:hover {
  background: rgba(34, 211, 238, 0.08);
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateX(3px);
}

.curriculum-step-item.active {
  background: rgba(34, 211, 238, 0.15);
  border-color: var(--accent-cyan, #22d3ee);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
}

.step-num-badge {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--accent-cyan, #22d3ee);
  background: rgba(34, 211, 238, 0.1);
  border-radius: 4px;
  padding: 2px 6px;
  flex-shrink: 0;
}

/* ═══════════════════════ QUANTITATIVE TRADING STRATEGIES BLUEPRINTS ═══════════════════════ */
.trading-strategies-section {
  width: 100%;
  box-sizing: border-box;
}

.strategies-container {
  background: rgba(10, 15, 29, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  box-sizing: border-box;
}

.strategy-blueprint-card {
  background: rgba(14, 18, 30, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-sizing: border-box;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.strategy-blueprint-card:hover {
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6), 0 0 16px rgba(34, 211, 238, 0.12);
}

.strat-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
}

.strat-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.strat-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
  margin: 0;
}

.strat-sub {
  font-size: 0.7rem;
  color: var(--text-muted, #94a3b8);
}

.strat-pill {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.65rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.strat-formula-box {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 2px 0;
}

.formula-label {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.64rem;
  font-weight: 700;
  color: var(--text-muted, #94a3b8);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 4px;
}

.formula-math {
  overflow-x: auto;
  overflow-y: hidden;
  font-size: 0.84rem;
  color: #f1f5f9;
  text-align: center;
  padding: 4px 0;
  scrollbar-width: thin;
}

.formula-math .katex-display {
  margin: 0.25em 0;
  text-align: center;
}

.formula-math .katex {
  font-size: 1.04em;
}

.strat-desc {
  font-size: 0.75rem;
  color: var(--text-secondary, #cbd5e1);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

.strat-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.param-tag {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.68rem;
  font-weight: 600;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  padding: 3px 7px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.param-tag i {
  font-size: 0.62rem;
  color: var(--accent-cyan, #22d3ee);
}

.strat-launch-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid;
  border-radius: 8px;
  font-size: 0.76rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  box-sizing: border-box;
}

.strat-launch-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

/* ── Interactive Quantitative Strategy Simulator Sandbox ──────────────── */
.quant-sim-desk-section {
  position: relative;
  z-index: 10;
}

.sim-desk-container {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

@media (max-width: 960px) {
  .sim-sandbox-grid {
    grid-template-columns: 1fr !important;
  }
}

.live-pulse-dot {
  animation: pulse-live-green 1.8s infinite ease-in-out;
}

@keyframes pulse-live-green {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1.15);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   COURSE COMPLETION & QUANTITATIVE MASTERY TRACKER HUD
   ═══════════════════════════════════════════════════════════════════════════ */
.mastery-progress-hud {
  margin: 0 auto 20px auto;
  max-width: 1380px;
  padding: 0 16px;
  box-sizing: border-box;
}

.hud-inner {
  background: rgba(10, 15, 26, 0.85);
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 12px;
  padding: 16px 20px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  gap: 22px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

/* Progress Ring */
.hud-ring-wrap {
  position: relative;
  width: 78px;
  height: 78px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.progress-ring-svg {
  transform: rotate(-90deg);
}

.progress-ring-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 6;
}

.progress-ring-fill {
  fill: none;
  stroke: #22d3ee;
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 238.76;
  stroke-dashoffset: 238.76;
  transition: stroke-dashoffset 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.5));
}

.hud-ring-text {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hud-percent-val {
  font-family: var(--font-mono, monospace);
  font-weight: 800;
  font-size: 0.95rem;
  color: #fff;
  line-height: 1;
}

.hud-percent-label {
  font-size: 0.55rem;
  font-weight: 700;
  color: var(--accent-cyan, #22d3ee);
  letter-spacing: 0.05em;
  margin-top: 2px;
}

/* Rank Center */
.hud-rank-center {
  flex: 1;
  min-width: 0;
}

.hud-rank-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 6px;
}

.hud-rank-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hud-rank-prefix {
  font-size: 0.68rem;
  color: var(--text-muted, #94a3b8);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hud-rank-badge {
  font-size: 0.85rem;
  font-weight: 800;
  color: #22d3ee;
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 3px 8px;
  border-radius: 6px;
}

.hud-labs-counter {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: var(--text-muted, #94a3b8);
}

.hud-labs-counter strong {
  color: #fff;
}

/* Segmented Progress Bar */
.hud-progress-bar-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.hud-progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #22d3ee, #10b981);
  border-radius: 3px;
  transition: width 0.5s ease;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.hud-milestone-tiers {
  display: flex;
  justify-content: space-between;
  font-size: 0.64rem;
  color: var(--text-muted, #64748b);
  font-family: var(--font-mono, monospace);
}

.hud-milestone-tiers .tier-dot.active {
  color: #10b981;
  font-weight: 700;
}

/* Actions Right */
.hud-actions-right {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}

.hud-action-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.hud-action-pill:hover, .hud-action-pill.active {
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.35);
  color: #22d3ee;
}

.hud-action-pill.subtle {
  border-color: transparent;
  background: transparent;
  color: var(--text-muted, #64748b);
  font-size: 0.68rem;
  justify-content: center;
}

.hud-action-pill.subtle:hover {
  color: #fff;
}

/* Completed Badges in Grid and Steps */
.curriculum-step-item.completed {
  border-color: rgba(16, 185, 129, 0.35) !important;
  background: rgba(16, 185, 129, 0.05);
}

.curriculum-step-item.completed .step-num-badge {
  background: rgba(16, 185, 129, 0.2) !important;
  color: #10b981 !important;
}

.step-completed-icon {
  color: #10b981;
  font-size: 0.8rem;
  margin-top: 3px;
}

.top-module-pill.completed {
  border-color: rgba(16, 185, 129, 0.4);
}

.top-module-pill.completed .top-pill-badge {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
}

.module-card-item.completed {
  border-color: rgba(16, 185, 129, 0.4);
}

/* Lab Complete Toggle in Action Bar */
.lab-act-btn.complete-toggle {
  border-color: rgba(16, 185, 129, 0.4);
  color: #10b981;
}

.lab-act-btn.complete-toggle.is-completed {
  background: rgba(16, 185, 129, 0.18);
  border-color: #10b981;
  color: #fff;
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

.lab-act-btn.next-lab-btn {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(14, 165, 233, 0.3));
  border-color: rgba(34, 211, 238, 0.5);
  color: #fff;
}

.lab-act-btn.next-lab-btn:hover {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.35), rgba(14, 165, 233, 0.45));
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.4);
}

@media (max-width: 900px) {
  .hud-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }
  .hud-ring-wrap {
    align-self: center;
  }
  .hud-actions-right {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   INTERACTIVE COURSES, DIRECT ACTION & LIVE SYNC SUITE
   ═══════════════════════════════════════════════════════════════════ */

.curriculum-card {
  background: rgba(13, 19, 33, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  position: relative;
  overflow: hidden;
}

.curriculum-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.curriculum-card.active-track {
  border-color: var(--accent-cyan, #22d3ee) !important;
  box-shadow: 0 0 25px rgba(34, 211, 238, 0.15) !important;
}

.curriculum-card.track-mastered {
  border-color: rgba(16, 185, 129, 0.5);
}

/* Course Live Telemetry Bar */
.course-live-telemetry-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  flex-wrap: wrap;
  gap: 6px;
}

.course-live-ticker-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: #fff;
}

.course-live-pulse-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulseCourseDot 2s infinite ease-in-out;
}

@keyframes pulseCourseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.course-live-price-pill {
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Course Interactive Mini-Workbench */
.course-mini-workbench {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.course-workbench-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: #94a3b8;
}

.course-workbench-slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.course-workbench-slider {
  flex: 1;
  height: 5px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  outline: none;
  cursor: pointer;
  accent-color: var(--accent-cyan, #22d3ee);
}

.course-workbench-result {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  color: #22d3ee;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: 6px;
  padding: 6px 10px;
  line-height: 1.4;
}

/* Course Direct Action Strip */
.course-direct-action-strip {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.course-direct-act-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.course-direct-act-btn.btn-trade {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(5, 150, 105, 0.3));
  border-color: rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.course-direct-act-btn.btn-trade:hover {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.35), rgba(5, 150, 105, 0.5));
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
  color: #fff;
}

.course-direct-act-btn.btn-desk {
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.35);
  color: #93c5fd;
}

.course-direct-act-btn.btn-desk:hover {
  background: rgba(59, 130, 246, 0.25);
  color: #fff;
}

.course-direct-act-btn.btn-quiz {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.course-direct-act-btn.btn-quiz:hover {
  background: rgba(245, 158, 11, 0.25);
  color: #fff;
}

.course-direct-act-btn.btn-start {
  background: rgba(236, 72, 153, 0.15);
  border-color: rgba(236, 72, 153, 0.35);
  color: #f472b6;
}

.course-direct-act-btn.btn-start:hover {
  background: rgba(236, 72, 153, 0.25);
  color: #fff;
}

/* Step-Level Actions */
.step-actions-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.step-quick-action-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted, #94a3b8);
  border-radius: 4px;
  padding: 3px 6px;
  font-size: 0.62rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  transition: all 0.15s ease;
}

.step-quick-action-btn:hover {
  background: rgba(34, 211, 238, 0.2);
  border-color: rgba(34, 211, 238, 0.5);
  color: #22d3ee;
}

.step-quick-action-btn.btn-trade-step:hover {
  background: rgba(16, 185, 129, 0.2);
  border-color: rgba(16, 185, 129, 0.5);
  color: #10b981;
}

/* Interactive Quiz Banner inside Course Card */
.course-quiz-banner {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: 8px;
  padding: 12px;
  display: none;
  flex-direction: column;
  gap: 8px;
}

.course-quiz-banner.active {
  display: flex;
  animation: fadeInCourseQuiz 0.2s ease;
}

@keyframes fadeInCourseQuiz {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.course-quiz-option {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.72rem;
  color: #e2e8f0;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
}

.course-quiz-option:hover {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fbbf24;
}

.course-quiz-option.correct {
  background: rgba(16, 185, 129, 0.25) !important;
  border-color: #10b981 !important;
  color: #10b981 !important;
  font-weight: 700;
}

.course-quiz-option.wrong {
  background: rgba(239, 68, 68, 0.25) !important;
  border-color: #ef4444 !important;
  color: #ef4444 !important;
}