@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

/* ============================================================
   Design Tokens
   ============================================================ */
:root {
  --font-body: 'Inter', system-ui, sans-serif;
  --font-heading: 'Outfit', system-ui, sans-serif;

  /* Background */
  --bg-primary: #030305;
  --bg-surface: #0a0a0f;
  --bg-card: rgba(18, 18, 24, 0.65);
  --bg-card-hover: rgba(28, 28, 36, 0.85);
  --bg-input: rgba(12, 12, 16, 0.6);
  --bg-overlay: rgba(3, 3, 5, 0.95);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.03);
  --border-default: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(167, 139, 250, 0.6);

  /* Accents */
  --accent-primary: #8b5cf6;
  --accent-primary-glow: rgba(139, 92, 246, 0.35);
  --accent-warm: #f97316;
  --accent-warm-glow: rgba(249, 115, 22, 0.3);
  --accent-learn: #a78bfa;
  --accent-quiz: #34d399;
  --accent-quiz-glow: rgba(52, 211, 153, 0.25);
  --accent-practice: #38bdf8;
  --accent-practice-glow: rgba(56, 189, 248, 0.25);

  /* Semantic colors */
  --color-positive: #34d399;
  --color-positive-bg: rgba(52, 211, 153, 0.12);
  --color-negative: #fb7185;
  --color-negative-bg: rgba(251, 113, 133, 0.12);
  --color-warning: #fbbf24;
  --color-warning-bg: rgba(251, 191, 36, 0.12);
  --color-info: #60a5fa;
  --color-info-bg: rgba(96, 165, 250, 0.12);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-explain: #cbd5e1;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 999px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 30px var(--accent-primary-glow);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 20px var(--accent-primary-glow);

  /* Transitions */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --top-nav-height: 76px;
  --top-nav-height-mobile: 60px;
  --sidebar-width: 320px;
  --sidebar-collapsed-width: 88px;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(167, 139, 250, 0.12), transparent 45%),
    radial-gradient(ellipse at 80% 80%, rgba(249, 115, 22, 0.08), transparent 45%),
    radial-gradient(ellipse at 50% 50%, rgba(56, 189, 248, 0.06), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin: 0 0 var(--space-sm) 0;
  line-height: 1.25;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p { margin: 0 0 var(--space-md) 0; color: var(--text-secondary); }

a {
  color: var(--accent-learn);
  text-decoration: none;
  transition: color 0.2s var(--ease-smooth);
}
a:hover { color: var(--accent-primary); }

small { font-size: 0.8rem; color: var(--text-muted); }

/* ============================================================
   App Shell
   ============================================================ */
.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: row;
  width: 100%;
}

.app-sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  max-width: var(--sidebar-width);
  height: 100vh;
  position: sticky;
  top: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  z-index: 500;
  flex-shrink: 0;
  overflow-y: auto;
  transition:
    width 0.22s var(--ease-smooth),
    min-width 0.22s var(--ease-smooth),
    max-width 0.22s var(--ease-smooth),
    padding 0.22s var(--ease-smooth);
}

.sidebar-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-left: var(--space-sm);
  min-width: 0;
}

.sidebar-brand .brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-warm));
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-weight: 800;
  color: white;
}

.sidebar-brand h1 {
  font-size: 1.15rem;
  margin: 0;
  background: linear-gradient(135deg, var(--accent-learn), var(--accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-collapse-toggle {
  flex: 0 0 auto;
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
}

.sidebar-collapse-toggle:hover {
  color: var(--text-primary);
  border-color: rgba(139, 92, 246, 0.45);
  background: rgba(139, 92, 246, 0.12);
}

.sidebar-collapse-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.22s var(--ease-smooth);
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s var(--ease-smooth);
  text-decoration: none;
}

.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.3rem;
  min-width: 1.3rem;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: rgba(139, 92, 246, 0.15);
  color: white;
  box-shadow: inset 3px 0 0 var(--accent-primary);
}

/* Tree Sub-nav */
.sidebar-group {
  display: flex;
  flex-direction: column;
}

.sidebar-sub-nav {
  display: none;
  flex-direction: column;
  padding-left: 3rem;
  margin-top: 0.2rem;
  margin-bottom: 0.5rem;
  border-left: 1px solid var(--border-subtle);
  margin-left: 1.6rem;
}

.sidebar-group.expanded .sidebar-sub-nav {
  display: flex;
}

.sidebar-sub-link {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.sidebar-sub-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  min-width: 1rem;
}

.sidebar-sub-label {
  min-width: 0;
}

.sidebar-sub-link:hover {
  color: var(--text-primary);
}

.sidebar-sub-link.active {
  color: var(--accent-practice);
  font-weight: 600;
}

.sidebar-bottom {
  margin-top: auto;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-width: 0;
}

html.sidebar-collapsed .app-sidebar {
  width: var(--sidebar-collapsed-width);
  min-width: var(--sidebar-collapsed-width);
  max-width: var(--sidebar-collapsed-width);
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

html.sidebar-collapsed .sidebar-brand-row {
  margin-bottom: var(--space-xl);
  flex-direction: column;
  align-items: center;
}

html.sidebar-collapsed .sidebar-brand {
  padding-left: 0;
}

html.sidebar-collapsed .brand-text,
html.sidebar-collapsed .nav-label,
html.sidebar-collapsed .sidebar-bottom {
  display: none;
}

html.sidebar-collapsed .sidebar-collapse-toggle-icon {
  transform: rotate(180deg);
}

html.sidebar-collapsed .sidebar-link {
  justify-content: center;
  gap: 0;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

html.sidebar-collapsed .sidebar-link.active {
  box-shadow: none;
}

html.sidebar-collapsed .sidebar-sub-nav {
  display: flex;
  gap: 0.35rem;
  padding-left: 0;
  margin-top: 0.35rem;
  margin-bottom: 0.5rem;
  margin-left: 0;
  border-left: 0;
}

html.sidebar-collapsed .sidebar-sub-link {
  justify-content: center;
  padding: 0.55rem 0;
  min-height: 2.35rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
}

html.sidebar-collapsed .sidebar-sub-link:hover {
  background: rgba(255, 255, 255, 0.06);
}

html.sidebar-collapsed .sidebar-sub-link.active {
  background: rgba(56, 189, 248, 0.12);
}

html.sidebar-collapsed .sidebar-sub-icon {
  width: 1.2rem;
  min-width: 1.2rem;
}

html.sidebar-collapsed .sidebar-sub-label {
  display: none;
}

.sidebar-market-status {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.live-indices-card {
  margin: 0 0 1rem;
  padding: 1rem;
  background:
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.14), transparent 45%),
    rgba(7, 12, 31, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: var(--radius-lg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.live-indices-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.live-indices-head h3 {
  margin: 0;
  font-size: 0.9rem;
}

.live-indices-head p {
  margin: 0.15rem 0 0;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.live-indices-link {
  color: var(--accent-learn);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
}

.live-indices-status {
  margin-bottom: 0.75rem;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.live-indices-list {
  display: grid;
  gap: 0.45rem;
}

.live-index-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
}

.live-index-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.live-index-meta strong {
  font-size: 0.76rem;
  line-height: 1.2;
}

.live-index-meta span {
  color: var(--text-muted);
  font-size: 0.72rem;
  margin-top: 0.1rem;
}

.live-index-change {
  flex: 0 0 auto;
  font-size: 0.8rem;
  font-weight: 700;
}

.live-index-change.up { color: #34d399; }
.live-index-change.down { color: #fb7185; }
.live-index-change.flat { color: var(--text-muted); }

.mobile-live-indices {
  display: none;
}

.mobile-live-indices-label,
.mobile-live-indices-price,
.mobile-live-indices-change {
  display: block;
}

.mobile-live-indices-label {
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(226, 232, 240, 0.72);
}

.mobile-live-indices-price {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.mobile-live-indices-change {
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.1;
}

.mobile-live-indices-change.up { color: #34d399; }
.mobile-live-indices-change.down { color: #fb7185; }
.mobile-live-indices-change.flat { color: var(--text-muted); }

.market-badge-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sidebar-controls-btn {
  width: 100%;
  justify-content: flex-start;
  font-size: 0.8rem;
  background: rgba(15, 20, 45, 0.5);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: white;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.user-info {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
}

.user-name {
  font-weight: 600;
  color: var(--text-primary);
}

.logout-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  text-align: left;
}

.logout-link:hover {
  color: var(--color-negative);
  text-decoration: underline;
}

/* ---- Top Navigation ---- */
.top-nav {
  display: none; /* Hidden on desktop, shown in mobile query */
  position: sticky;
  top: 0;
  z-index: 100;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-md) var(--space-xl);
  min-height: var(--top-nav-height);
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.top-nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-right: auto;
}

.top-nav-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-warm));
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: white;
}

.top-nav-brand h1 {
  font-size: 1.3rem;
  margin: 0;
  background: linear-gradient(135deg, var(--accent-learn), var(--accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.top-nav-links {
  display: flex;
  gap: var(--space-xs);
}

.mobile-tabbar {
  display: none;
}

.top-nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-left: auto;
  flex-wrap: nowrap;
  justify-content: flex-end;
  position: relative;
}

.user-menu-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  min-height: 40px;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  background: rgba(17, 22, 56, 0.9);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
}

.user-menu-toggle:hover,
.top-nav-user.is-open .user-menu-toggle {
  border-color: rgba(139, 92, 246, 0.45);
  box-shadow: 0 0 0 2px var(--accent-primary-glow);
}

.user-menu-toggle-icon {
  font-size: 1rem;
  line-height: 1;
}

.user-menu-toggle-text {
  max-width: 7.5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-menu-panel {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.user-chip {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-md);
  background: rgba(17, 22, 56, 0.9);
  border: 1px solid var(--border-default);
  min-width: 140px;
}

.user-chip-label {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.user-chip strong {
  font-size: 0.92rem;
  color: var(--text-primary);
}

.user-switch-form,
.user-create-form {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.top-nav-user select,
.top-nav-user input[type="text"] {
  min-height: 38px;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  outline: none;
}

.top-nav-user select:focus,
.top-nav-user input[type="text"]:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary-glow);
}

.top-nav-links a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.3s var(--ease-smooth);
  border: 1px solid transparent;
  text-decoration: none;
}

.top-nav-links a .nav-icon {
  font-size: 1.1rem;
}

.top-nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-card);
  border-color: var(--border-default);
}

.top-nav-links a.active {
  color: white;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(249, 115, 22, 0.15));
  border-color: var(--accent-primary-glow);
  box-shadow: 0 0 12px var(--accent-primary-glow);
}

/* ---- Content Area ---- */
.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  width: 0; /* Let flex-grow handle it */
}

.content-main {
  flex: 1;
  padding: var(--space-xl) var(--space-2xl);
  min-width: 0;
  width: 100%;
}

/* Hide old lab strip on desktop */
.lab-strip {
  display: none !important;
}

/* Show lab strip only on mobile */
@media (max-width: 900px) {
  .lab-strip {
    display: block !important;
  }
}

.sidebar-panel.collapsed {
  width: 72px;
  padding: var(--space-lg) 0.7rem;
  opacity: 1;
  overflow: hidden;
}

.content-area.no-sidebar .sidebar-panel {
  display: none;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.sidebar-toggle {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  background: rgba(17, 22, 56, 0.95);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s var(--ease-smooth);
}

.sidebar-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sidebar-toggle-icon svg {
  display: block;
  transition: transform 0.2s var(--ease-smooth);
}

.sidebar-toggle.is-collapsed .sidebar-toggle-icon svg {
  transform: rotate(180deg);
}

.sidebar-toggle:hover {
  background: var(--accent-primary);
  color: white;
}

.content-area.no-sidebar .sidebar-toggle {
  display: none;
}

.sidebar-panel.collapsed .sidebar-header {
  justify-content: center;
}

.sidebar-panel.collapsed .sidebar-header h3,
.sidebar-panel.collapsed .sidebar-form {
  display: none;
}

.sidebar-form {
  flex: 1;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.lab-nav {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.lab-nav a {
  justify-content: flex-start;
}

.lab-nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.2rem;
  width: 1.25rem;
  height: 1.25rem;
  flex: 0 0 auto;
}

.lab-nav-label {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  overflow: hidden;
}

.lab-nav-svg {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
}

.sidebar-panel.collapsed .lab-nav {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-top: 0;
}

.sidebar-panel.collapsed .lab-nav a {
  width: 100%;
  min-width: 0;
  height: 3rem;
  padding: 0.75rem 0;
  justify-content: center;
  gap: 0;
  font-size: 0;
  line-height: 0;
}

.sidebar-panel.collapsed .lab-nav-label {
  display: none;
  width: 0;
  opacity: 0;
}

.sidebar-panel.collapsed .lab-nav a > :not(.lab-nav-icon) {
  display: none !important;
}

.sidebar-panel.collapsed .lab-nav-icon {
  min-width: 0;
  width: 1.35rem;
  height: 1.35rem;
}

.sidebar-panel.collapsed .lab-nav-svg {
  width: 1.35rem;
  height: 1.35rem;
}

.sidebar-panel h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

.sidebar-panel label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.sidebar-panel label span {
  color: var(--accent-learn);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
}

.sidebar-panel select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  outline: none;
  margin-bottom: var(--space-md);
  transition: border-color 0.2s;
}

.sidebar-panel select:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary-glow);
}

.sidebar-panel input[type="range"] {
  width: 100%;
  accent-color: var(--accent-primary);
  cursor: pointer;
  margin-bottom: var(--space-lg);
}

.sidebar-group {
  margin-bottom: 0;
}

/* ---- Inline Lab Strip (replaces sidebar) ---- */
.lab-strip {
  padding: 0.65rem var(--space-xl) 0;
  background: rgba(10, 14, 39, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: var(--top-nav-height);
  z-index: 90;
}

.lab-strip-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
}

.lab-nav-inline {
  display: flex;
  gap: 0.3rem;
  padding: 0.25rem;
  background: rgba(15, 20, 45, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
}

.lab-pill {
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.25s var(--ease-smooth);
}

.lab-pill:hover {
  color: var(--text-primary);
  background: rgba(139, 92, 246, 0.08);
}

.lab-pill.active {
  color: white;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(249, 115, 22, 0.18));
  border-color: rgba(139, 92, 246, 0.35);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.12);
}

.lab-strip-badges {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  position: absolute;
  right: 0;
}

.lab-controls-details {
  padding-bottom: 0.5rem;
}

.lab-controls-summary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.35rem 0.8rem;
  margin: 0.5rem 0 0.25rem;
  border-radius: var(--radius-full);
  background: rgba(15, 20, 45, 0.5);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  transition: all 0.2s;
}

.lab-controls-summary::-webkit-details-marker { display: none; }
.lab-controls-summary::after { content: ' ▾'; font-size: 0.7em; }
.lab-controls-details[open] .lab-controls-summary::after { content: ' ▴'; }

.lab-controls-summary:hover {
  background: rgba(139, 92, 246, 0.1);
  color: var(--text-primary);
}

.lab-controls-form {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: 0.5rem 0 0.65rem;
  flex-wrap: wrap;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.lab-control {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  min-width: 0;
  flex: 1 1 220px;
  max-width: 320px;
}

.lab-control label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0;
  min-width: 0;
  gap: var(--space-sm);
}

.lab-control label span {
  color: var(--accent-learn);
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
}

.lab-control input[type="range"] {
  flex: 1;
  min-width: 60px;
  accent-color: var(--accent-primary);
  cursor: pointer;
  margin: 0;
}

.lab-control-toggle {
  flex: 0 0 auto;
  flex-direction: row;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
  max-width: none;
  padding-top: 1.35rem;
}

/* ---- Footer ---- */
.app-footer {
  padding: var(--space-xl);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-subtle);
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: all 0.3s var(--ease-smooth);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-flat {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

article {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
}

/* ============================================================
   Badges & Pills
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-learn { background: rgba(167, 139, 250, 0.15); color: var(--accent-learn); border: 1px solid rgba(167, 139, 250, 0.3); }
.badge-quiz { background: var(--color-positive-bg); color: var(--color-positive); border: 1px solid rgba(52, 211, 153, 0.3); }
.badge-practice { background: rgba(56, 189, 248, 0.15); color: var(--accent-practice); border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); border: 1px solid rgba(251, 191, 36, 0.3); }
.badge-danger { background: var(--color-negative-bg); color: var(--color-negative); border: 1px solid rgba(251, 113, 133, 0.3); }
.badge-neutral { background: var(--color-warning-bg); color: var(--color-warning); border: 1px solid rgba(251, 191, 36, 0.3); }
.badge-live { background: rgba(56, 189, 248, 0.15); color: #38bdf8; border: 1px solid rgba(56,189,248,0.3); }
.badge-fallback { background: rgba(167, 139, 250, 0.15); color: #a78bfa; border: 1px solid rgba(167,139,250,0.3); }
.badge-market-open { background: rgba(16, 185, 129, 0.12); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-market-closed { background: rgba(239, 68, 68, 0.12); color: #fb7185; border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-market-premarket { background: rgba(251, 191, 36, 0.12); color: #fbbf24; border: 1px solid rgba(251, 191, 36, 0.3); }

.source-pill, .iv-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-low { background: var(--color-positive-bg); color: var(--color-positive); border: 1px solid rgba(52,211,153,0.3); }
.badge-high { background: var(--color-negative-bg); color: var(--color-negative); border: 1px solid rgba(251,113,133,0.3); }

/* ============================================================
   Learn Hub
   ============================================================ */
.learn-hub { max-width: 900px; margin: 0 auto; }

.welcome-banner {
  text-align: center;
  padding: var(--space-xl) var(--space-xl);
  margin-bottom: var(--space-lg);
}

.welcome-banner h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--accent-learn), #f0abfc, var(--accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease infinite;
  background-size: 200% auto;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.welcome-banner p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl) auto;
}

/* Progress Bar */
.progress-bar-wrap {
  max-width: 400px;
  margin: 0 auto;
}

.progress-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.progress-bar-track {
  height: 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-warm));
  border-radius: var(--radius-full);
  transition: width 0.8s var(--ease-smooth);
  min-width: 0;
}

/* Topic Cards */
.topic-grid {
  display: grid;
  gap: var(--space-lg);
}

.topic-card {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  transition: all 0.3s var(--ease-smooth);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.topic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-primary-glow), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}

.topic-card:hover::before { opacity: 1; }

.topic-card:hover {
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateX(4px);
  box-shadow: var(--shadow-hover);
}

.topic-card > * { position: relative; z-index: 1; }

.topic-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.8rem;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(249, 115, 22, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.2);
}

.topic-info h3 {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.topic-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.topic-status {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  min-width: 85px;
}

.status-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border-default);
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  transition: all 0.3s;
}

.status-dot.completed {
  border-color: var(--color-positive);
  background: var(--color-positive-bg);
  color: var(--color-positive);
}

.status-dot.in-progress {
  border-color: var(--accent-learn);
  background: rgba(167, 139, 250, 0.15);
  color: var(--accent-learn);
}

.status-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  font-weight: 600;
}

.quiz-score-mini {
  font-size: 0.75rem;
  color: var(--color-positive);
  font-weight: 700;
}

/* ============================================================
   Lesson Pages
   ============================================================ */
.lesson-page {
  max-width: 800px;
  margin: 0 auto;
}

.lesson-header {
  margin-bottom: var(--space-2xl);
}

.lesson-header .breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.lesson-header .breadcrumb a { color: var(--accent-learn); }

.lesson-header h1 {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.lesson-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-explain);
}

.lesson-body h2 {
  color: var(--text-primary);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

.lesson-body h3 {
  color: var(--accent-learn);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.lesson-body strong {
  color: var(--text-primary);
  font-weight: 600;
}

.concept-highlight {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(249, 115, 22, 0.08));
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-left: 3px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.concept-highlight .concept-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-learn);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.analogy-box {
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.2);
  border-left: 3px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.analogy-box .analogy-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-warning);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.lesson-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}

/* ============================================================
   Quiz
   ============================================================ */
.quiz-page {
  max-width: 700px;
  margin: 0 auto;
}

.quiz-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  margin-bottom: var(--space-lg);
}

.quiz-card .question-number {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-quiz);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.quiz-card .question-text {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  font-weight: 500;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  cursor: pointer;
  transition: all 0.2s var(--ease-smooth);
  background: transparent;
  color: var(--text-secondary);
}

.quiz-option:hover {
  border-color: rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.08);
  color: var(--text-primary);
}

.quiz-option input[type="radio"] {
  accent-color: var(--accent-primary);
  width: 18px;
  height: 18px;
}

.quiz-option.selected {
  border-color: var(--accent-primary);
  background: rgba(139, 92, 246, 0.12);
  color: var(--text-primary);
}

/* Quiz Results */
.quiz-result {
  text-align: center;
  padding: var(--space-2xl);
}

.quiz-score-display {
  font-size: 4rem;
  font-weight: 800;
  font-family: var(--font-heading);
  background: linear-gradient(135deg, var(--accent-quiz), var(--accent-learn));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.quiz-result-feedback {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  text-align: left;
}

.result-card.correct { border-left: 3px solid var(--color-positive); }
.result-card.wrong { border-left: 3px solid var(--color-negative); }

.result-card .result-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.result-card.correct .result-label { color: var(--color-positive); }
.result-card.wrong .result-label { color: var(--color-negative); }

.result-card .explanation {
  font-size: 0.9rem;
  color: var(--text-explain);
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-subtle);
}

/* ============================================================
   Explainer Tooltips
   ============================================================ */
.explainer {
  position: relative;
  cursor: help;
  border-bottom: 1px dotted var(--accent-learn);
}

.explainer-popup {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 280px;
  padding: var(--space-md);
  background: var(--bg-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-explain);
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
  z-index: 200;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  text-align: left;
}

.explainer:hover .explainer-popup,
.explainer:focus .explainer-popup {
  display: block;
  animation: popIn 0.2s var(--ease-bounce);
}

.explainer-popup .explainer-title {
  font-weight: 700;
  color: var(--accent-learn);
  margin-bottom: var(--space-xs);
  font-size: 0.9rem;
}

@keyframes popIn {
  from { opacity: 0; transform: translateX(-50%) translateY(4px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ============================================================
   Teaching Boxes
   ============================================================ */
.teaching-box {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.08), rgba(56, 189, 248, 0.06));
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.teaching-box h4 {
  color: var(--accent-learn);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
}

.teaching-box p {
  margin: var(--space-sm) 0;
  color: var(--text-explain);
  font-size: 0.95rem;
  line-height: 1.65;
}

.insight-box {
  background: rgba(52, 211, 153, 0.06);
  border: 1px solid rgba(52, 211, 153, 0.2);
  border-left: 4px solid var(--color-positive);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.insight-box h4 {
  color: var(--color-positive);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
}

.insight-box p {
  margin: var(--space-sm) 0;
  color: var(--text-explain);
  font-size: 0.95rem;
}

.what-is-this {
  background: rgba(96, 165, 250, 0.06);
  border: 1px solid rgba(96, 165, 250, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.what-is-this summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--color-info);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  list-style: none;
}

.what-is-this summary::-webkit-details-marker { display: none; }
.what-is-this summary::before { content: '📖'; }

.what-is-this[open] .what-content {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(96, 165, 250, 0.15);
  color: var(--text-explain);
  font-size: 0.95rem;
  line-height: 1.7;
  animation: fadeSlideIn 0.3s ease;
}

/* ============================================================
   Grids
   ============================================================ */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--space-lg); }

.split-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--space-lg); }
.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--space-md); }
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-md); }

/* ============================================================
   Tables
   ============================================================ */
.table-wrap {
  overflow-x: auto;
  max-width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.15);
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: right;
}

.unified-chain-table {
  min-width: 1280px;
  table-layout: fixed;
  font-variant-numeric: tabular-nums;
  border-collapse: collapse;
}

.unified-chain-table col.chain-col-oi { width: 5.5rem; }
.unified-chain-table col.chain-col-greek { width: 5.25rem; }
.unified-chain-table col.chain-col-iv { width: 5.25rem; }
.unified-chain-table col.chain-col-price { width: 5.75rem; }
.unified-chain-table col.chain-col-strike { width: 7.25rem; }

.unified-chain-table th,
.unified-chain-table td {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
}

.unified-chain-table th:first-child,
.unified-chain-table td:first-child {
  text-align: right;
}

th, td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

th {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  position: sticky;
  top: 0;
}

th:first-child, td:first-child { text-align: left; }

.unified-chain-table th,
.unified-chain-table td,
.unified-chain-table th:first-child,
.unified-chain-table td:first-child {
  text-align: right;
}

.unified-chain-table th {
  position: static;
}

.unified-chain-table thead tr:first-child th:first-child,
.unified-chain-table thead tr:first-child th:last-child,
.unified-chain-table thead .strike-cell {
  text-align: center;
}

.unified-chain-table .chain-side-head {
  text-align: center;
}

.unified-chain-table .chain-calls-head {
  border-right: 1px solid rgba(255,255,255,0.1);
}

.unified-chain-table .chain-puts-head {
  border-left: 1px solid rgba(255,255,255,0.1);
}

.unified-chain-table thead .strike-cell[rowspan] {
  min-width: 7.25rem;
  vertical-align: middle;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

tbody tr { transition: background-color 0.15s; }
tbody tr:hover td { background: rgba(255, 255, 255, 0.03); }

/* Option chain cell colors */
td.itm-call { background: rgba(52, 211, 153, 0.08); }
td.otm-call { background: rgba(251, 113, 133, 0.05); }
td.itm-put { background: rgba(56, 189, 248, 0.08); }
td.otm-put { background: rgba(139, 92, 246, 0.05); }
td.atm-cell {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  font-weight: 700;
}
td.strike-cell {
  background: rgba(255, 255, 255, 0.05);
  font-weight: bold;
  text-align: center;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.dte-warning td { background: var(--color-negative-bg) !important; }

/* ============================================================
   Forms & Buttons
   ============================================================ */
input[type="text"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
  transition: all 0.2s;
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary-glow);
}

fieldset {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

fieldset legend {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0 var(--space-sm);
}

label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: block;
  margin-bottom: var(--space-xs);
}

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s var(--ease-smooth);
  border: none;
  text-decoration: none;
}

button, .btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #6d28d9);
  color: white;
  box-shadow: 0 4px 15px var(--accent-primary-glow);
}

button:hover, .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.5);
}

.btn-secondary, button.secondary {
  background: transparent;
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  box-shadow: none;
}

.btn-secondary:hover, button.secondary:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  background: rgba(139, 92, 246, 0.08);
}

.btn-quiz {
  background: linear-gradient(135deg, var(--accent-quiz), #059669);
  color: white;
  box-shadow: 0 4px 15px var(--accent-quiz-glow);
}

.btn-quiz:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(52, 211, 153, 0.4);
}

.btn-warm {
  background: linear-gradient(135deg, var(--accent-warm), #dc2626);
  color: white;
  box-shadow: 0 4px 15px var(--accent-warm-glow);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

/* ============================================================
   Page Headers
   ============================================================ */
.page-header {
  margin-bottom: var(--space-xl);
}

.page-header h2 {
  margin-bottom: var(--space-sm);
}

.page-header p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ============================================================
   Spotlight Cards (Chain)
   ============================================================ */
.spotlight-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.spotlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.spotlight-card h3 {
  font-size: 1rem;
  color: var(--accent-learn);
  margin-bottom: var(--space-sm);
}

.spotlight-strike {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.compact-metrics {
  grid-template-columns: repeat(4, 1fr);
}

.compact-metrics p {
  font-size: 0.85rem;
  margin: 0;
}

.compact-metrics strong {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.2rem;
}

/* ============================================================
   Strategy Visualizer
   ============================================================ */
.strategy-shell {
  display: grid;
  gap: var(--space-lg);
}

.strategy-config {
  display: grid;
  gap: var(--space-lg);
}

.strategy-config-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
}

.strategy-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-learn);
}

.strategy-description {
  margin: 0;
  max-width: 56rem;
}

.strategy-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.55rem;
}

.strategy-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 700;
}

.strategy-selector {
  display: grid;
  gap: 0.35rem;
}

.strategy-selector select {
  margin-bottom: 0;
}

.strategy-helper {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.strategy-leg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
}

.strategy-leg-card {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
  background: rgba(8, 12, 31, 0.38);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.strategy-leg-head {
  margin-bottom: 0.75rem;
}

.strategy-leg-head h4 {
  margin-bottom: 0;
  font-size: 1rem;
}

.strategy-leg-index {
  margin: 0 0 0.2rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.strategy-leg-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.8rem;
}

.strategy-leg-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.strategy-leg-card select {
  margin-bottom: 0.7rem;
}

.strategy-leg-premium {
  margin: 0;
  font-size: 0.88rem;
}

.strategy-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-subtle);
}

.strategy-submit {
  width: auto;
  flex: 0 0 auto;
  align-self: flex-start;
}

.strategy-results {
  display: grid;
  gap: var(--space-lg);
}

.strategy-chart-card {
  padding: var(--space-lg);
}

.strategy-chart-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-bottom: 0.85rem;
}

.strategy-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
}

.strategy-summary-grid-compact {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.strategy-stat-card {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: rgba(15, 20, 45, 0.75);
  border: 1px solid var(--border-default);
}

.strategy-stat-card-compact {
  padding: 0.85rem 1rem;
  background: rgba(8, 12, 31, 0.45);
}

.strategy-stat-label {
  margin: 0 0 0.4rem;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.strategy-stat-card h4 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.strategy-stat-card-compact h4 {
  font-size: 0.95rem;
  line-height: 1.25;
}

.strategy-chart-guide {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 0.95rem;
}

.strategy-guide-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
}

.strategy-guide-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  display: inline-block;
}

.strategy-guide-dot-profit {
  background: #34d399;
}

.strategy-guide-dot-loss {
  background: #fb7185;
}

.strategy-guide-dot-spot {
  background: #cbd5e1;
}

.strategy-guide-dot-breakeven {
  background: #fb7185;
  transform: rotate(45deg);
  border-radius: 0.1rem;
}

.strategy-insight {
  margin-top: 0;
}

/* ============================================================
   Plotly Charts
   ============================================================ */
.plot {
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 300px;
}

/* ============================================================
   Simulator Specific
   ============================================================ */
.trade-panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.trade-panel-header h3 {
  margin-bottom: 0;
}

.trade-context-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
}

.trade-context-pill {
  min-width: 108px;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.24);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.trade-context-label {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.trade-context-pill strong {
  color: var(--text-primary);
  font-size: 0.96rem;
}

.notice {
  padding: var(--space-md) var(--space-lg);
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-md);
  color: var(--accent-learn);
  font-weight: 500;
  margin-bottom: var(--space-lg);
}

.auth-feedback {
  margin-bottom: var(--space-md);
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  line-height: 1.45;
}

.auth-feedback-error {
  background: rgba(251, 113, 133, 0.12);
  border: 1px solid rgba(251, 113, 133, 0.28);
  color: #fecdd3;
}

.lesson-form {
  margin-bottom: var(--space-lg);
  padding: var(--space-lg);
  background: rgba(52, 211, 153, 0.06);
  border: 1px solid rgba(52, 211, 153, 0.15);
  border-radius: var(--radius-lg);
}

.simulator-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

.simulator-market-card {
  padding: 1rem;
  min-width: 250px;
}

.simulator-market-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.simulator-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

/* ── Simulator Tab System ── */
.sim-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: var(--space-lg);
  padding: 0.3rem;
  background: rgba(15, 20, 45, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  width: fit-content;
}

.sim-tab {
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s var(--ease-smooth);
  white-space: nowrap;
}

.sim-tab:hover {
  color: var(--text-primary);
  background: rgba(139, 92, 246, 0.08);
}

.sim-tab.active {
  color: white;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(249, 115, 22, 0.18));
  border-color: rgba(139, 92, 246, 0.35);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.15);
}

.sim-panel {
  display: none;
  animation: simPanelIn 0.3s var(--ease-smooth);
}

.sim-panel.active {
  display: block;
}

@keyframes simPanelIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Trade Tab helpers ── */
.trade-context-bar {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.trade-context-pill {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(15, 20, 45, 0.6);
  border: 1px solid var(--border-default);
  font-size: 0.82rem;
}

.trade-context-label {
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.trade-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.trade-cost-strip {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  background: rgba(139, 92, 246, 0.06);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

.trade-coach-section {
  margin-top: var(--space-xl);
}

.trade-coach-head {
  margin-bottom: var(--space-md);
}

.trade-coach-head h3 {
  margin-bottom: 0.3rem;
}

.trade-coach-head p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.trade-coach-grid {
  display: grid;
  gap: var(--space-lg);
}

.trade-coach-card {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: rgba(8, 12, 31, 0.5);
  border: 1px solid var(--border-default);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.trade-coach-positive {
  border-color: rgba(52, 211, 153, 0.28);
}

.trade-coach-negative {
  border-color: rgba(251, 113, 133, 0.28);
}

.trade-coach-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.trade-coach-title h4 {
  margin-bottom: 0.25rem;
  text-transform: capitalize;
}

.trade-coach-title p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.55;
}

.trade-coach-trigger {
  flex: 0 0 min(18rem, 40%);
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-md);
  font-size: 0.78rem;
  line-height: 1.45;
  font-weight: 700;
}

.trigger-positive {
  color: #bbf7d0;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.24);
}

.trigger-warning {
  color: #fde68a;
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.24);
}

.trigger-danger {
  color: #fecdd3;
  background: rgba(251, 113, 133, 0.1);
  border: 1px solid rgba(251, 113, 133, 0.26);
}

.trigger-neutral {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
}

.trade-coach-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.trade-coach-facts div {
  padding: 0.75rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border-subtle);
}

.trade-coach-facts small {
  display: block;
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.68rem;
}

.trade-coach-facts span {
  display: block;
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.5;
}

.trade-coach-flags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.trade-coach-flags span {
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-full);
  color: #fed7aa;
  background: rgba(249, 115, 22, 0.1);
  border: 1px solid rgba(249, 115, 22, 0.24);
  font-size: 0.76rem;
  font-weight: 700;
}

.trade-coach-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.trade-action-card,
.trade-coach-quiz details {
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-md);
  background: rgba(15, 20, 45, 0.5);
  border: 1px solid var(--border-subtle);
}

.trade-action-card summary,
.trade-coach-quiz summary {
  cursor: pointer;
  color: var(--text-primary);
  font-weight: 700;
  list-style: none;
}

.trade-action-card summary::-webkit-details-marker,
.trade-coach-quiz summary::-webkit-details-marker {
  display: none;
}

.trade-action-card p,
.trade-coach-quiz p {
  margin: 0.55rem 0 0;
  color: var(--text-secondary);
  font-size: 0.82rem;
  line-height: 1.5;
}

.action-positive {
  border-color: rgba(52, 211, 153, 0.24);
}

.action-warning {
  border-color: rgba(251, 191, 36, 0.24);
}

.trade-coach-quiz {
  display: grid;
  gap: var(--space-sm);
}

.trade-coach-quiz h5 {
  margin: 0;
  color: var(--accent-learn);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Responsive hide helpers ── */
.hide-mobile { /* shown by default, hidden in media query below */ }

.journal-selected-trade {
  margin-bottom: var(--space-md);
  padding: 0.8rem 0.95rem;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.journal-linked-trade {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.75rem;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.journal-trade-outcome {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============================================================
   Toggle Switch
   ============================================================ */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--bg-input);
  transition: .4s;
  border: 1px solid var(--border-default);
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-secondary);
  transition: .4s;
}

input:checked + .slider {
  background-color: rgba(139, 92, 246, 0.2);
  border-color: var(--accent-primary);
}

input:checked + .slider:before {
  transform: translateX(20px);
  background-color: var(--accent-primary);
}

.slider.round {
  border-radius: 24px;
}

.slider.round:before {
  border-radius: 50%;
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

main > *, #main > * {
  animation: fadeSlideIn 0.4s ease-out forwards;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .content-main { padding: var(--space-lg); }
  .sidebar-panel { width: 260px; }
  .spotlight-strip { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  body {
    padding-bottom: calc(5.8rem + env(safe-area-inset-bottom));
  }

  .top-nav {
    flex-wrap: nowrap;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    min-height: var(--top-nav-height-mobile);
  }

  .top-nav-brand {
    margin-right: auto;
    width: auto;
    flex: 1 1 auto;
    min-width: 0;
  }
  .top-nav-links { display: none; }

  .top-nav-user {
    width: auto;
    margin-left: auto;
    justify-content: flex-end;
  }

  .user-menu-toggle {
    display: inline-flex;
  }

  .user-menu-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    min-width: min(20rem, calc(100vw - 2rem));
    max-width: calc(100vw - 2rem);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 0.9rem;
    border-radius: var(--radius-lg);
    background: var(--bg-overlay);
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-card);
  }

  .top-nav-user.is-open .user-menu-panel {
    display: flex;
  }

  .user-switch-form, .user-create-form {
    flex: 1 1 100%;
    width: 100%;
  }

  .top-nav-user select,
  .top-nav-user input[type="text"] {
    flex: 1;
    min-width: 0;
  }

  .top-nav-links a {
    padding: 0.45rem 0.75rem;
    font-size: 0.8rem;
    white-space: nowrap;
  }

  .top-nav-links a .nav-label { display: none; }
  .top-nav-links a .nav-icon { font-size: 1.2rem; }

  .content-area { flex-direction: column; }

  .content-main { padding: var(--space-md); }

  .mobile-live-indices {
    display: inline-flex;
  }

  /* Lab strip mobile */
  .top-nav, .lab-strip { position: relative; top: 0; }
  .lab-strip { padding: 0.5rem var(--space-md) 0; }
  .lab-strip-row { gap: var(--space-sm); }
  .lab-nav-inline { width: 100%; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .lab-nav-inline::-webkit-scrollbar { display: none; }
  .lab-pill { padding: 0.4rem 0.7rem; font-size: 0.75rem; }
  .lab-strip-badges { display: none; }
  .lab-controls-form { flex-direction: column; gap: var(--space-md); }
  .lab-control { flex: 1 1 100%; max-width: none; }
  .lab-control-toggle { width: 100%; justify-content: flex-start; padding-top: 0; }

  .split-grid, .grid-2 { grid-template-columns: 1fr; }
  .simulator-header { flex-direction: column; gap: var(--space-md); }
  .simulator-market-card { width: 100%; min-width: 0; }
  .simulator-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .simulator-actions form,
  .simulator-actions button { width: 100%; }
  .trade-panel-header { flex-direction: column; }
  .trade-context-pills { justify-content: flex-start; }

  /* Simulator tabs: full-width pills on mobile */
  .sim-tabs {
    width: 100%;
    justify-content: stretch;
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  .sim-tab { flex: 1; text-align: center; padding: 0.5rem 0.6rem; font-size: 0.78rem; }
  .hide-mobile { display: none !important; }
  .trade-form-grid { grid-template-columns: 1fr 1fr; }
  .trade-cost-strip { flex-direction: column; gap: var(--space-sm); }
  .trade-context-bar { gap: var(--space-sm); }
  .trade-coach-title { flex-direction: column; gap: var(--space-md); }
  .trade-coach-trigger { flex-basis: auto; width: 100%; }
  .trade-coach-facts { grid-template-columns: 1fr; }
  .strategy-config-head,
  .strategy-actions,
  .strategy-chart-head { flex-direction: column; }
  .strategy-pills { justify-content: flex-start; }
  .strategy-submit { width: 100%; }
  .welcome-banner h1 { font-size: 1.8rem; }
  .topic-card { grid-template-columns: 44px 1fr auto; gap: var(--space-md); padding: var(--space-md); }
  .topic-icon { width: 44px; height: 44px; font-size: 1.4rem; }
  .quiz-card { padding: var(--space-lg); }

  .mobile-tabbar {
    position: fixed;
    left: 0.8rem;
    right: 0.8rem;
    bottom: calc(0.8rem + env(safe-area-inset-bottom));
    z-index: 500;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.2rem;
    padding: 0.45rem;
    background: rgba(10, 14, 39, 0.96);
    border: 1px solid var(--border-default);
    border-radius: 1.15rem;
    box-shadow: 0 16px 38px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateZ(0);
  }

  .mobile-tabbar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    min-height: 3.5rem;
    padding: 0.45rem 0.2rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    box-shadow: none;
    font-size: 0.72rem;
    font-family: var(--font-body);
    text-decoration: none;
  }

  .mobile-tabbar a.active {
    background: rgba(139, 92, 246, 0.12);
    border-color: rgba(139, 92, 246, 0.22);
    color: var(--text-primary);
  }

  .mobile-tabbar-icon {
    font-size: 1.15rem;
    line-height: 1;
  }

  .mobile-tabbar-label {
    font-size: 0.7rem;
    font-weight: 600;
    line-height: 1.1;
  }

  .sidebar-toggle {
    display: none;
  }

  .sidebar-panel.collapsed {
    width: 100%;
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .top-nav-brand h1 { font-size: 1.1rem; }
  .user-menu-toggle-text { display: none; }
  .user-chip { width: 100%; }
  .topic-card { grid-template-columns: 1fr; }
  .topic-icon { display: none; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .simulator-actions { grid-template-columns: 1fr; }
}

/* AI Response Styling */
.ai-response {
    color: var(--text-explain);
    line-height: 1.7;
    font-size: 0.95rem;
}

.ai-response h3 {
    color: var(--accent-learn);
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 0.35rem;
}

.ai-response ul, .ai-response ol {
    margin-bottom: 1.25rem;
    padding-left: 1.25rem;
}

.ai-response li {
    margin-bottom: 0.5rem;
}

.ai-response table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0;
    font-size: 0.85rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.ai-response th, .ai-response td {
    padding: 0.75rem;
    border: 1px solid var(--border-subtle);
    text-align: left;
}

.ai-response th {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.ai-response tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.ai-response strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Enhanced User Menu & Mobile Top Nav Styles */
.desktop-user-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.user-menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  cursor: pointer;
  padding: 0;
  overflow: hidden;
  transition: all 0.2s var(--ease-smooth);
}

.user-menu-avatar {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-weight: 700;
  color: var(--accent-learn);
  font-family: var(--font-heading);
  font-size: 1rem;
}

.user-menu-panel {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 200px;
  background: var(--bg-overlay);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-card);
  z-index: 1000;
  flex-direction: column;
  gap: 0.75rem;
}

.top-nav-user.is-open .user-menu-panel {
  display: flex;
}

.user-menu-header {
  display: flex;
  flex-direction: column;
}

.user-menu-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.user-menu-name {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.user-menu-logout .btn {
  width: 100%;
}

@media (max-width: 900px) {
  .brand-text { display: none; }
  .desktop-user-info { display: none; }
  .user-menu-toggle { display: block; }
  
  .top-nav-brand .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }
}

/* Visibility toggles */
.mobile-only { display: none; }

@media (max-width: 900px) {
  .app-sidebar { display: none; }
  .app-shell { flex-direction: column; }
  .mobile-only { display: flex; }
  .top-nav { display: flex; }
  .content-area { padding-top: 0; }
}

/* Sidebar Control Styles */
.sidebar-controls-vertical {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sidebar-control-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}

.sidebar-control-item label {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar-control-item label span {
  color: var(--accent-learn);
  font-weight: 700;
}

.sidebar-control-item input[type="range"] {
  width: 100%;
  accent-color: var(--accent-primary);
}

.sidebar-control-item.toggle-row {
  flex-direction: row;
  align-items: center;
  gap: 0.75rem;
}

/* Fix for main content overflow */
.content-area {
  overflow-x: hidden;
}

#main {
  width: 100%;
}

.sidebar-market-controls,
.live-indices-card,
.sidebar-user {
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

/* Journal Deletion */
.btn-icon-delete {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  transition: color 0.2s;
}
.btn-icon-delete:hover {
  color: var(--color-negative);
}

/* Help Overlay */
#help-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}
.help-content {
  background: var(--bg-surface);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-card);
}
.help-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.help-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.help-divider {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
kbd {
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-family: monospace;
  color: var(--accent-primary);
  font-weight: 700;
}

/* Greeks Heatmap */
.heatmap-cell {
  position: relative;
  z-index: 1;
}
.heatmap-bg {
  position: absolute;
  inset: 2px;
  z-index: -1;
  border-radius: 4px;
  opacity: 0.15;
}