/* ThoughtStream Design System with Comprehensive Dark Mode */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Source+Code+Pro:wght@400;500;600&display=swap');

:root {
  /* Brand Palette (Light) */
  --color-primary: #78716C;
  --color-secondary: #A8A29E;
  --color-tertiary: #1C1917;

  /* Surface Palette (Light) */
  --color-bg: #FAFAF9;
  --color-surface: #F5F5F4;
  --color-surface-raised: #EFEDEB;

  /* Content Palette (Light) */
  --color-text-primary: #1C1917;
  --color-text-secondary: #57534E;
  --color-text-tertiary: #A8A29E;

  /* Border Palette (Light) */
  --color-border-subtle: #E7E5E4;
  --color-border-medium: #D6D3D1;
  --color-border-strong: #A8A29E;

  /* Semantic Colors */
  --color-success: #65A30D;
  --color-success-bg: #F0FDF4;
  --color-warning: #CA8A04;
  --color-warning-bg: #FEFCE8;
  --color-error: #DC2626;
  --color-error-bg: #FEF2F2;
  --color-info: #78716C;
  --color-info-bg: #F5F5F4;

  /* Typography */
  --font-serif: 'Libre Baskerville', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Source Code Pro', 'Fira Code', Consolas, monospace;

  /* Spacing */
  --space-1: 6px;
  --space-2: 12px;
  --space-3: 18px;
  --space-4: 24px;
  --space-6: 36px;
  --space-8: 48px;

  /* Focus ring */
  --focus-ring: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-primary);
}

/* Dark Mode Palette */
body.dark-mode {
  --color-primary: #A8A29E;
  --color-secondary: #78716C;
  --color-tertiary: #FAFAF9;

  --color-bg: #0C0A09;
  --color-surface: #1C1917;
  --color-surface-raised: #292524;

  --color-text-primary: #FAFAF9;
  --color-text-secondary: #D6D3D1;
  --color-text-tertiary: #78716C;

  --color-border-subtle: #292524;
  --color-border-medium: #44403C;
  --color-border-strong: #78716C;

  --color-success: #84CC16;
  --color-success-bg: #14230D;
  --color-warning: #EAB308;
  --color-warning-bg: #261F05;
  --color-error: #EF4444;
  --color-error-bg: #2B0D0D;
  --color-info: #A8A29E;
  --color-info-bg: #1C1917;

  --focus-ring: 0 0 0 2px var(--color-bg), 0 0 0 4px #A8A29E;
}

/* Base Global Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

*:not(.v-theme-toggle):not(.v-theme-toggle *):not(.badge-pill) {
  border-radius: 0;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Headings */
h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

h1 { font-size: 32px; letter-spacing: -0.02em; margin-bottom: var(--space-3); }
h2 { font-size: 24px; letter-spacing: -0.015em; margin-bottom: var(--space-2); }
h3 { font-size: 19px; font-weight: 400; margin-bottom: var(--space-2); }
p { margin-bottom: var(--space-3); color: var(--color-text-secondary); }

/* Layout & App Frame */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Navigation */
.app-sidebar {
  width: 260px;
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header {
  padding: var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-border-subtle);
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.brand-subtitle {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

.nav-menu {
  list-style: none;
  padding: var(--space-2) 0;
  flex-grow: 1;
}

.nav-item {
  padding: 10px var(--space-3);
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.15s ease;
}

.nav-item:hover {
  background-color: var(--color-surface-raised);
  color: var(--color-text-primary);
}

.nav-item.active {
  background-color: var(--color-surface-raised);
  color: var(--color-text-primary);
  border-left-color: var(--color-primary);
  font-weight: 600;
}

.nav-item .nav-icon {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-primary);
}

.sidebar-footer {
  padding: 0 var(--space-3);
  height: 60px;
  min-height: 60px;
  max-height: 60px;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-sizing: border-box;
  position: relative;
}

.theme-dock-placeholder {
  min-width: 104px;
  width: 104px;
  height: 38px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  margin-left: auto;
  user-select: none;
  flex-shrink: 0;
}

/* Main Content Area */
.app-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--color-bg);
}

.topbar {
  height: 56px;
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-bg);
}

.topbar-status {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.content-viewport {
  padding: var(--space-6) var(--space-8);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.page-view {
  display: none;
}
.page-view.active {
  display: block;
}

/* Cards */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.card-elevated {
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border-medium);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.card-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
  background: transparent;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FAFAF9;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background-color: #57534E;
}
body.dark-mode .btn-primary:hover {
  background-color: #D6D3D1;
  color: #1C1917;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border-medium);
}
.btn-secondary:hover {
  background-color: var(--color-surface-raised);
}

.btn-destructive {
  background-color: var(--color-error);
  color: #FAFAF9;
  border-color: var(--color-error);
}
.btn-destructive:hover {
  background-color: #B91C1C;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12px;
}

/* Form Controls */
.form-group {
  margin-bottom: var(--space-3);
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-medium);
  outline: none;
  transition: border-color 0.15s ease;
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

textarea.form-control {
  min-height: 100px;
  line-height: 1.6;
  resize: vertical;
}

/* Grids & Metric Cards */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }

.stat-box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-3);
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-top: 4px;
}

/* Badges & Chips */
.badge {
  display: inline-block;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border-subtle);
}

.badge-hate {
  background-color: var(--color-error-bg);
  color: var(--color-error);
  border-color: var(--color-error);
}

.badge-nonhate {
  background-color: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success);
}

.badge-neutral {
  background-color: var(--color-surface-raised);
  color: var(--color-text-secondary);
}

/* Interactive Explainability Tokens */
.token-stream {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: var(--space-3);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  line-height: 2.2;
}

.attr-token {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  border: 1px solid var(--color-border-subtle);
  cursor: default;
}

.token-positive {
  background-color: rgba(220, 38, 38, 0.15);
  border-color: var(--color-error);
  color: var(--color-error);
  font-weight: 600;
}

.token-negative {
  background-color: rgba(101, 163, 13, 0.15);
  border-color: var(--color-success);
  color: var(--color-success);
  font-weight: 600;
}

/* Tables */
.table-container {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border-subtle);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

th {
  background-color: var(--color-surface-raised);
  padding: 10px 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border-medium);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.05em;
}

td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-primary);
}

tr:hover td {
  background-color: var(--color-surface-raised);
}

/* Code & Pre */
pre, code {
  font-family: var(--font-mono);
  font-size: 13px;
}

pre {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-3);
  overflow-x: auto;
  color: var(--color-text-primary);
  line-height: 1.5;
}

/* Cojeev Theme Toggle (000h by Cojeev - MIT) - Draggable Pill */
.v-btn.v-theme-toggle,
#themeToggleBtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  min-width: 104px;
  padding: 0 16px;
  border-radius: 9999px !important; /* Cojeev pill shape */
  border: 1px solid var(--color-border-medium);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: grab;
  user-select: none;
  touch-action: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: background-color 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
              border-color 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
              color 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.2s ease,
              transform 0.15s ease;
}

.v-btn.v-theme-toggle:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
}

.v-btn.v-theme-toggle:active {
  cursor: grabbing;
}

.v-btn.v-theme-toggle.is-dragging,
#themeToggleBtn.is-dragging {
  cursor: grabbing !important;
  opacity: 0.96;
  transform: scale(1.06) !important;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.32), 0 0 0 1.5px var(--color-primary) !important;
  transition: none !important;
  z-index: 999999 !important;
}

.v-theme-toggle-icon {
  flex: none;
  overflow: visible;
  display: block;
}

.v-theme-rays {
  transform-origin: 12px 12px;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.25s ease;
}

.v-theme-rays path {
  transition: stroke-dashoffset 0.25s ease, opacity 0.25s ease;
  stroke-dasharray: 2;
  stroke-dashoffset: 0;
}

.v-theme-body {
  transform-origin: 12px 12px;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Light appearance state */
[data-theme="light"] .v-theme-rays,
:root:not([data-theme="dark"]) body:not(.dark-mode) .v-theme-rays {
  transform: rotate(0deg);
  opacity: 1;
}

[data-theme="light"] .v-theme-body,
:root:not([data-theme="dark"]) body:not(.dark-mode) .v-theme-body {
  transform: rotate(0deg);
}

/* Dark appearance state */
body.dark-mode .v-theme-rays,
[data-theme="dark"] .v-theme-rays {
  transform: rotate(45deg);
  opacity: 0;
}

body.dark-mode .v-theme-rays path,
[data-theme="dark"] .v-theme-rays path {
  stroke-dashoffset: 2;
  opacity: 0;
}

body.dark-mode .v-theme-body,
[data-theme="dark"] .v-theme-body {
  transform: rotate(-12deg);
}

.v-theme-toggle__label {
  color: inherit;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 12px;
  line-height: 1;
}

/* View Transition Ripple Reveal */
::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}
::view-transition-old(root) {
  z-index: 1;
}
::view-transition-new(root) {
  z-index: 9999;
}

@media (max-width: 900px) {
  .app-container { flex-direction: column; }
  .app-sidebar { width: 100%; height: auto; position: static; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .content-viewport { padding: var(--space-4); }
}