/* ============================================================
   QRUCIBLE v3.0 — Design System
   Dark engineering UI matching FORGE aesthetic
   ============================================================ */

/* ── CSS Custom Properties (Dark Theme Default) ── */
:root {
  /* Backgrounds */
  --bg-primary: #0A0A0A;
  --bg-secondary: #111111;
  --bg-tertiary: #1A1A1A;
  --bg-elevated: #222222;
  --bg-overlay: rgba(10, 10, 10, 0.92);

  /* Text */
  --text-primary: rgba(255,255,255,0.92);
  --text-secondary: rgba(255,255,255,0.6);
  --text-tertiary: rgba(255,255,255,0.3);
  --text-disabled: rgba(255,255,255,0.2);

  /* Accents — Silver tones */
  --accent-cyan: #C0C0C0;
  --accent-cyan-dim: rgba(192, 192, 192, 0.15);
  --accent-cyan-glow: rgba(192, 192, 192, 0.35);
  --accent-purple: #A0A0A0;
  --accent-purple-dim: rgba(160, 160, 160, 0.15);
  --accent-purple-glow: rgba(160, 160, 160, 0.35);
  --accent-green: #B0B0B0;
  --accent-green-dim: rgba(176, 176, 176, 0.15);
  --accent-green-glow: rgba(176, 176, 176, 0.35);
  --accent-orange: #999999;
  --accent-orange-dim: rgba(153, 153, 153, 0.15);
  --accent-orange-glow: rgba(153, 153, 153, 0.35);
  --accent-red: #CC6666;
  --accent-red-dim: rgba(204, 102, 102, 0.15);

  /* Fonts */
  --font-sans: Arial, Helvetica, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;

  /* Type Scale */
  --text-xs: 11px;
  --text-sm: 13px;
  --text-base: 14px;
  --text-md: 15px;
  --text-lg: 17px;
  --text-xl: 20px;
  --text-2xl: 24px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Borders */
  --border-subtle: 1px solid rgba(255,255,255,0.06);
  --border-default: 1px solid rgba(255,255,255,0.1);
  --border-strong: 1px solid rgba(255,255,255,0.18);
  --border-accent: 1px solid var(--accent-cyan);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.6);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.7);
  --shadow-cyan: 0 0 20px rgba(192, 192, 192, 0.2);
  --shadow-purple: 0 0 20px rgba(160, 160, 160, 0.2);
  --shadow-green: 0 0 20px rgba(176, 176, 176, 0.2);

  /* Gradients */
  --gradient-cyan: linear-gradient(135deg, #C0C0C0, #909090);
  --gradient-purple: linear-gradient(135deg, #A0A0A0, #787878);
  --gradient-green: linear-gradient(135deg, #B0B0B0, #888888);
  --gradient-orange: linear-gradient(135deg, #999999, #707070);
  --gradient-bg: linear-gradient(180deg, #0A0A0A 0%, #080808 100%);
  --gradient-panel: linear-gradient(180deg, rgba(17,17,17,0.98) 0%, rgba(10,10,10,0.98) 100%);
  --gradient-card: linear-gradient(135deg, rgba(26,26,26,0.8), rgba(17,17,17,0.8));
  --gradient-glow-cyan: radial-gradient(ellipse at center, rgba(192,192,192,0.08) 0%, transparent 70%);

  /* Transitions */
  --transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --topbar-height: 56px;
  --sidebar-width: 240px;
  --sidebar-collapsed: 64px;
  --guide-width: 320px;
  --statusbar-height: 28px;
}

/* ── Light Theme ── */
[data-theme="light"] {
  --bg-primary: #F2F2F2;
  --bg-secondary: #E8E8E8;
  --bg-tertiary: #DDDDDD;
  --bg-elevated: #F2F2F2;
  --bg-overlay: rgba(242, 242, 242, 0.92);

  --text-primary: rgba(0,0,0,0.87);
  --text-secondary: rgba(0,0,0,0.6);
  --text-tertiary: rgba(0,0,0,0.35);
  --text-disabled: rgba(0,0,0,0.2);

  --accent-cyan: #333333;
  --accent-purple: #555555;
  --accent-green: #444444;
  --accent-orange: #555555;
  --accent-red: #884444;
  --accent-cyan-dim: rgba(50, 50, 50, 0.1);
  --accent-purple-dim: rgba(85, 85, 85, 0.1);
  --accent-green-dim: rgba(68, 68, 68, 0.1);
  --accent-orange-dim: rgba(85, 85, 85, 0.1);
  --accent-red-dim: rgba(136, 68, 68, 0.1);

  --border-subtle: 1px solid rgba(0,0,0,0.06);
  --border-default: 1px solid rgba(0,0,0,0.1);
  --border-strong: 1px solid rgba(0,0,0,0.16);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
  --shadow-cyan: 0 0 20px rgba(50,50,50,0.15);
  --shadow-purple: 0 0 20px rgba(85,85,85,0.15);
  --shadow-green: 0 0 20px rgba(68,68,68,0.15);
  --gradient-bg: linear-gradient(180deg, #F2F2F2 0%, #E8E8E8 100%);
  --gradient-panel: linear-gradient(180deg, rgba(232,232,232,0.98) 0%, rgba(242,242,242,0.98) 100%);
  --gradient-card: linear-gradient(135deg, rgba(221,221,221,0.9), rgba(232,232,232,0.9));
  --gradient-cyan: linear-gradient(135deg, #333333, #555555);
  --gradient-purple: linear-gradient(135deg, #555555, #666666);
  --gradient-green: linear-gradient(135deg, #444444, #555555);
  --gradient-orange: linear-gradient(135deg, #555555, #666666);
  --gradient-glow-cyan: radial-gradient(ellipse at center, rgba(50,50,50,0.06) 0%, transparent 70%);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* ── App Shell Layout ── */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Topbar */
.topbar {
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  background: var(--bg-secondary);
  border-bottom: var(--border-default);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  gap: var(--space-3);
  z-index: 100;
  flex-shrink: 0;
}

.topbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.topbar-logo svg { width: 28px; height: 28px; }

.topbar-logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.topbar-logo-text span {
  background: var(--gradient-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.topbar-divider {
  width: 1px;
  height: 20px;
  background: rgba(255,255,255,0.12);
}

.topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.breadcrumb-item { color: var(--text-tertiary); white-space: nowrap; }
.breadcrumb-item.active { color: var(--text-primary); }
.breadcrumb-sep { color: var(--text-disabled); font-size: 10px; }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.segment-badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--accent-cyan-dim);
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  font-weight: 500;
}

.segment-badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.icon-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 14px;
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.15);
}

.user-menu-btn {
  display: flex; align-items: center; gap: var(--space-2);
  padding: 4px 10px 4px 4px;
  background: var(--bg-tertiary);
  border: var(--border-subtle);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.user-menu-btn:hover { border-color: rgba(255,255,255,0.15); color: var(--text-primary); }

.user-avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--gradient-purple);
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: white;
}

/* ── Middle Row (Sidebar + Main + Guide) ── */
.content-row {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: var(--border-default);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition-slow), min-width var(--transition-slow);
  z-index: 50;
  flex-shrink: 0;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed);
  min-width: var(--sidebar-collapsed);
}

.sidebar-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
}

.sidebar-section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .sidebar-section-label { opacity: 0; }

.sidebar-toggle {
  width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; color: var(--text-tertiary);
  cursor: pointer; border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-toggle:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-2) 0;
}

.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.nav-group { padding: var(--space-2) 0; }

.nav-group-label {
  padding: var(--space-2) var(--space-4) var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-disabled);
  white-space: nowrap;
  overflow: hidden;
}

.sidebar.collapsed .nav-group-label { opacity: 0; height: 0; padding: 0; overflow: hidden; }

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 7px var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
  white-space: nowrap;
  overflow: hidden;
  position: relative;
}

.nav-item:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
}

.nav-item.active {
  color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
  border-left-color: var(--accent-cyan);
}

.nav-item-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}

.nav-item-text { flex: 1; overflow: hidden; text-overflow: ellipsis; }

.nav-badge {
  padding: 1px 6px;
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-mono);
  border-radius: var(--radius-full);
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.sidebar.collapsed .nav-item-text,
.sidebar.collapsed .nav-badge { opacity: 0; width: 0; overflow: hidden; }

.sidebar.collapsed .nav-item { justify-content: center; padding: 7px; border-left: none; }
.sidebar.collapsed .nav-item.active { border-radius: var(--radius-sm); }

/* Sidebar tooltip on collapse */
.sidebar.collapsed .nav-item[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  white-space: nowrap;
  border: var(--border-default);
  box-shadow: var(--shadow-md);
  z-index: 200;
}

.sidebar-footer {
  padding: var(--space-3);
  border-top: var(--border-subtle);
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-primary);
  position: relative;
}

.main-content::-webkit-scrollbar { width: 6px; }
.main-content::-webkit-scrollbar-track { background: transparent; }
.main-content::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
.main-content::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

.page-container {
  padding: var(--space-6);
  max-width: 1400px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
}

.page-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* ── Guide Panel ── */
.guide-panel {
  width: var(--guide-width);
  min-width: var(--guide-width);
  background: var(--bg-secondary);
  border-left: var(--border-default);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition-slow), min-width var(--transition-slow), opacity var(--transition-slow);
  flex-shrink: 0;
}

.guide-panel.collapsed {
  width: 0;
  min-width: 0;
  opacity: 0;
  pointer-events: none;
}

.guide-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.guide-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex; align-items: center; gap: var(--space-2);
}

.guide-title::before {
  content: '?';
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent-purple-dim);
  border: 1px solid var(--accent-purple);
  color: var(--accent-purple);
  font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}

.guide-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
}

.guide-body::-webkit-scrollbar { width: 3px; }
.guide-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 2px; }

.guide-section { margin-bottom: var(--space-5); }

.guide-section-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-disabled);
  margin-bottom: var(--space-2);
}

.guide-tip {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.5;
}

.guide-tip-icon { flex-shrink: 0; margin-top: 1px; }

/* ── Status Bar ── */
.statusbar {
  height: var(--statusbar-height);
  min-height: var(--statusbar-height);
  background: var(--bg-secondary);
  border-top: var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 var(--space-4);
  gap: var(--space-5);
  flex-shrink: 0;
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-tertiary);
}

.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
}

.status-dot.connected { background: var(--accent-green); box-shadow: 0 0 6px var(--accent-green); }
.status-dot.disconnected { background: var(--accent-red); }
.status-dot.warning { background: var(--accent-orange); }

.status-spacer { flex: 1; }

.status-version {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--text-disabled);
}

/* ── Cards ── */
.card {
  background: var(--bg-secondary);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover { border-color: rgba(255,255,255,0.15); }

.card-header {
  padding: var(--space-4);
  border-bottom: var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.card-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
}

.card-body { padding: var(--space-4); }

.card-accent-cyan { border-color: rgba(192, 192, 192, 0.3); }
.card-accent-purple { border-color: rgba(160, 160, 160, 0.3); }
.card-accent-green { border-color: rgba(176, 176, 176, 0.3); }
.card-accent-orange { border-color: rgba(153, 153, 153, 0.3); }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-cyan { background: var(--accent-cyan-dim); color: var(--accent-cyan); border: 1px solid rgba(192,192,192,0.3); }
.badge-purple { background: var(--accent-purple-dim); color: var(--accent-purple); border: 1px solid rgba(160,160,160,0.3); }
.badge-green { background: var(--accent-green-dim); color: var(--accent-green); border: 1px solid rgba(176,176,176,0.3); }
.badge-orange { background: var(--accent-orange-dim); color: var(--accent-orange); border: 1px solid rgba(153,153,153,0.3); }
.badge-red { background: var(--accent-red-dim); color: var(--accent-red); border: 1px solid rgba(136,68,68,0.3); }
.badge-neutral { background: var(--bg-tertiary); color: var(--text-secondary); border: var(--border-subtle); }

/* Confidence badges */
.confidence-high { background: var(--accent-green-dim); color: var(--accent-green); border: 1px solid rgba(176,176,176,0.4); font-family: var(--font-mono); }
.confidence-medium { background: var(--accent-orange-dim); color: var(--accent-orange); border: 1px solid rgba(153,153,153,0.4); font-family: var(--font-mono); }
.confidence-low { background: var(--accent-red-dim); color: var(--accent-red); border: 1px solid rgba(136,68,68,0.4); font-family: var(--font-mono); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-cyan);
  color: #fff;
  box-shadow: 0 1px 6px rgba(192,192,192,0.3);
}
.btn-primary:hover { box-shadow: 0 2px 12px rgba(192,192,192,0.5); transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: var(--border-default);
}
.btn-secondary:hover { background: var(--bg-elevated); color: var(--text-primary); border-color: rgba(255,255,255,0.2); }

.btn-ghost {
  background: transparent;
  color: var(--text-tertiary);
}
.btn-ghost:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.btn-danger {
  background: var(--accent-red-dim);
  color: var(--accent-red);
  border: 1px solid rgba(136,68,68,0.3);
}
.btn-danger:hover { background: rgba(136,68,68,0.25); }

.btn-sm {
  padding: 4px var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
}

/* ── Inputs ── */
.input, .select, .textarea {
  width: 100%;
  background: var(--bg-tertiary);
  border: var(--border-default);
  border-radius: var(--radius-md);
  padding: 8px var(--space-3);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.input:focus, .select:focus, .textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-cyan-dim);
}

.input::placeholder { color: var(--text-disabled); }
.textarea { resize: vertical; min-height: 80px; }
.select { cursor: pointer; }

.input-mono { font-family: var(--font-mono); font-size: var(--text-xs); }

/* ── Tables ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table th {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-tertiary);
  border-bottom: var(--border-default);
  background: var(--bg-secondary);
  position: sticky; top: 0; z-index: 1;
}

.data-table td {
  padding: var(--space-2) var(--space-3);
  border-bottom: var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: middle;
}

.data-table tr:hover td { background: rgba(255,255,255,0.02); color: var(--text-primary); }
.data-table .mono { font-family: var(--font-mono); font-size: var(--text-xs); }

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-tertiary);
  padding: 3px;
  border-radius: var(--radius-md);
  width: fit-content;
}

.tab {
  padding: 5px 16px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-tertiary);
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-md) - 2px);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab:hover { color: var(--text-secondary); background: rgba(255,255,255,0.04); }
.tab.active { background: var(--bg-secondary); color: var(--text-primary); box-shadow: var(--shadow-sm); }

/* Underline tabs (for pages) */
.tabs-underline {
  display: flex;
  gap: var(--space-1);
  border-bottom: var(--border-default);
  background: none;
  padding: 0;
  border-radius: 0;
}

.tabs-underline .tab {
  padding: var(--space-3) var(--space-4);
  border-radius: 0;
  border-bottom: 2px solid transparent;
  background: none;
}

.tabs-underline .tab:hover { color: var(--text-primary); background: rgba(255,255,255,0.02); }
.tabs-underline .tab.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: none;
  box-shadow: none;
}

/* ── Grid Layouts ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }

/* ── KPI Card ── */
.kpi-card {
  background: var(--bg-secondary);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.kpi-card:hover { border-color: rgba(255,255,255,0.15); box-shadow: var(--shadow-md); }

.kpi-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-tertiary);
}

.kpi-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1;
}

.kpi-delta {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

.kpi-delta.positive { color: var(--accent-green); }
.kpi-delta.negative { color: var(--accent-red); }

/* ── Progress / Loading ── */
.progress-bar {
  height: 3px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-cyan);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.skeleton {
  background: linear-gradient(90deg,
    var(--bg-tertiary) 0%,
    rgba(255,255,255,0.06) 50%,
    var(--bg-tertiary) 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ── Code / Mono ── */
.code-block {
  background: var(--bg-tertiary);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  overflow-x: auto;
  line-height: 1.7;
  white-space: pre;
}

.code-inline {
  background: var(--bg-tertiary);
  border: var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--accent-cyan);
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--bg-tertiary);
  border: none;
  margin: var(--space-4) 0;
}

/* ── Tooltips ── */
[data-tooltip] { position: relative; }
[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%; transform: translateX(-50%);
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  white-space: nowrap;
  border: var(--border-default);
  box-shadow: var(--shadow-md);
  z-index: 200;
  pointer-events: none;
}

/* ── Scrollbar Global ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

/* ── Animations ── */
@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slide-in-right {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 8px rgba(192,192,192,0.2); }
  50% { box-shadow: 0 0 24px rgba(192,192,192,0.5); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-fade-in { animation: fade-in var(--transition-slow) both; }
.animate-slide-in-right { animation: slide-in-right var(--transition-slow) both; }
.animate-scale-in { animation: scale-in var(--transition-base) both; }

/* Stagger delays */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }

/* ── Utility ── */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.flex-1 { flex: 1; }
.min-w-0 { min-width: 0; }
.overflow-hidden { overflow: hidden; }
.text-mono { font-family: var(--font-mono); }
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-cyan { color: var(--accent-cyan); }
.text-purple { color: var(--accent-purple); }
.text-green { color: var(--accent-green); }
.text-orange { color: var(--accent-orange); }
.text-red { color: var(--accent-red); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.w-full { width: 100%; }
.p-4 { padding: var(--space-4); }
.hidden { display: none !important; }

/* ── Taxonomy Tree ── */
.taxonomy-tree { padding: var(--space-2) 0; }

.tree-node {
  font-size: var(--text-sm);
  user-select: none;
}

.tree-node-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.tree-node-header:hover { background: rgba(255,255,255,0.04); }
.tree-node-header.active { background: var(--accent-cyan-dim); }

.tree-node-header.active .tree-node-label { color: var(--accent-cyan); }

.tree-toggle {
  width: 14px; height: 14px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-tertiary);
  font-size: 10px;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.tree-toggle.open { transform: rotate(90deg); }
.tree-node-icon { font-size: 14px; flex-shrink: 0; }
.tree-node-label { color: var(--text-secondary); font-weight: 500; flex: 1; }
.tree-node-count { font-family: var(--font-mono); font-size: 10px; color: var(--text-disabled); flex-shrink: 0; }

.tree-children {
  padding-left: var(--space-4);
  border-left: 1px solid rgba(255,255,255,0.06);
  margin-left: 18px;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
}

.tree-children.open { max-height: 2000px; }

/* ── Segment Status Cards ── */
.segment-card {
  background: var(--bg-secondary);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.segment-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--gradient-cyan);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.segment-card:hover {
  border-color: rgba(192,192,192,0.3);
  box-shadow: var(--shadow-cyan);
  transform: translateY(-2px);
}

.segment-card.active { border-color: var(--accent-cyan); background: rgba(192,192,192,0.05); }

/* ── Advisory Banner ── */
.advisory-banner {
  background: rgba(153,153,153,0.08);
  border: 1px solid rgba(153,153,153,0.3);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  line-height: 1.5;
}

.advisory-icon { color: var(--accent-orange); font-size: 14px; flex-shrink: 0; margin-top: 1px; }

/* ── Responsive ── */
@media (max-width: 1200px) {
  .guide-panel { width: 0; min-width: 0; opacity: 0; pointer-events: none; }
}

@media (max-width: 900px) {
  .sidebar { width: var(--sidebar-collapsed); min-width: var(--sidebar-collapsed); }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .page-container { padding: var(--space-4); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Lifecycle Specific ── */
.lifecycle-canvas-wrapper {
  background: var(--bg-secondary);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.lifecycle-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border-top: var(--border-subtle);
}

.playback-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-elevated);
  border: var(--border-default);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 12px;
  transition: all var(--transition-fast);
}

.playback-btn:hover { background: var(--bg-primary); color: var(--text-primary); border-color: rgba(255,255,255,0.2); }
.playback-btn.active { background: var(--accent-cyan-dim); color: var(--accent-cyan); border-color: var(--accent-cyan); }

.speed-control {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

input[type="range"] {
  -webkit-appearance: none;
  height: 4px;
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--accent-cyan);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 6px var(--accent-cyan-glow);
}

/* D3 Node styles */
.d3-node { cursor: pointer; transition: all 0.2s; }
.d3-node:hover .node-bg { filter: brightness(1.3); }
.d3-edge { stroke: rgba(255,255,255,0.1); fill: none; stroke-width: 1.5; }

/* Pipeline step styles */
.pipeline-step {
  background: var(--bg-secondary);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.pipeline-step.active {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-cyan);
}

.pipeline-step.complete {
  border-color: rgba(176,176,176,0.3);
}

/* Mini-map */
.minimap {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 140px;
  height: 90px;
  background: var(--bg-overlay);
  border: var(--border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
}

/* Detail Panel slide-in */
.detail-panel {
  position: absolute;
  top: 0; right: 0;
  width: 300px; height: 100%;
  background: var(--bg-secondary);
  border-left: var(--border-default);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
  z-index: 10;
}

.detail-panel.open { transform: translateX(0); }
.detail-panel-header {
  padding: var(--space-4);
  border-bottom: var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Chat Interface ── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--topbar-height) - var(--statusbar-height) - 120px);
  min-height: 400px;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.chat-message {
  display: flex;
  gap: var(--space-3);
  animation: fade-in 0.3s both;
}

.chat-message.user { flex-direction: row-reverse; }

.message-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}

.message-avatar.ai { background: var(--accent-purple-dim); border: 1px solid rgba(160,160,160,0.3); color: var(--accent-purple); }
.message-avatar.user { background: var(--accent-cyan-dim); border: 1px solid rgba(192,192,192,0.3); color: var(--accent-cyan); }

.message-body { max-width: 80%; }

.message-content {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-primary);
}

.chat-message.ai .message-content {
  background: var(--bg-secondary);
  border: var(--border-default);
}

.chat-message.user .message-content {
  background: var(--accent-cyan-dim);
  border: 1px solid rgba(192,192,192,0.25);
  text-align: right;
}

.message-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-disabled);
}

.chat-message.user .message-meta { justify-content: flex-end; }

/* Tool invocation card */
.tool-card {
  background: var(--bg-tertiary);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.tool-card:hover { border-color: rgba(192,192,192,0.3); }

.tool-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.tool-card-icon { font-size: 12px; }

.tool-card-body {
  padding: var(--space-3);
  border-top: var(--border-subtle);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  display: none;
}

.tool-card.expanded .tool-card-body { display: block; }

.tool-latency {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-disabled);
  margin-left: auto;
}

/* RAG citation card */
.rag-citation {
  background: rgba(160,160,160,0.06);
  border: 1px solid rgba(160,160,160,0.2);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
  overflow: hidden;
}

.rag-citation-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  font-size: var(--text-xs);
  color: var(--accent-purple);
}

.rag-citation-body {
  padding: var(--space-3);
  border-top: 1px solid rgba(160,160,160,0.15);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  display: none;
  line-height: 1.6;
}

.rag-citation.expanded .rag-citation-body { display: block; }

/* Chat input area */
.chat-input-area {
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border-top: var(--border-default);
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
}

.chat-input-wrapper {
  flex: 1;
  position: relative;
}

.chat-input {
  width: 100%;
  background: var(--bg-tertiary);
  border: var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--text-primary);
  resize: none;
  outline: none;
  transition: border-color var(--transition-fast);
  min-height: 44px;
  max-height: 120px;
  overflow-y: auto;
}

.chat-input:focus { border-color: var(--accent-cyan); }

/* Session sidebar */
.session-sidebar {
  width: 220px;
  min-width: 220px;
  border-right: var(--border-default);
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}

.session-item {
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-subtle);
  cursor: pointer;
  transition: background var(--transition-fast);
  font-size: var(--text-xs);
}

.session-item:hover { background: rgba(255,255,255,0.03); }
.session-item.active { background: var(--accent-cyan-dim); }

/* ── Radar Chart ── */
.radar-container {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Heatmap ── */
.heatmap-grid {
  display: grid;
  gap: 2px;
}

.heatmap-cell {
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.heatmap-cell:hover { transform: scale(1.1); z-index: 5; box-shadow: var(--shadow-md); }

/* ── Footer / Attribution ── */
footer {
  border-top: var(--border-subtle);
  padding: var(--space-3) var(--space-6);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-disabled);
  flex-shrink: 0;
}

footer a { color: var(--accent-cyan); text-decoration: none; }
footer a:hover { text-decoration: underline; }