:root {
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  
  /* Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  
  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  
  /* Light Theme Colors (Default) */
  --bg-page: #f8f9fa;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f3f5;
  --bg-lane: #e9ecef;
  --bg-header: #212529;
  
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #868e96;
  --text-inverse: #f8f9fa;
  
  --border-color: #dee2e6;
  --border-focus: #339af0;
  
  /* Semantic Colors */
  --color-claude: #5c7cfa;
  --color-gemini: #20c997;
  --color-human: #ff922b;
  
  --color-critical: #e03131;
  --color-warning: #f08c00;
  --color-info: #1c7ed6;
  
  --color-lane-backlog: #ced4da;
  --color-lane-ready: #74c0fc;
  --color-lane-inflight: #fab005;
  --color-lane-review: #b197fc;
  --color-lane-done: #51cf66;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-drawer: -4px 0 24px rgba(0,0,0,0.15);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #121212;
    --bg-surface: #1e1e1e;
    --bg-surface-hover: #2c2c2c;
    --bg-lane: #181818;
    --bg-header: #000000;
    
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --text-inverse: #e0e0e0;
    
    --border-color: #333333;
    
    --color-claude: #4263eb;
    --color-gemini: #0ca678;
    --color-human: #d9480f;
    
    --color-critical: #c92a2a;
    --color-warning: #e67700;
    --color-info: #1864ab;
    
    --color-lane-backlog: #495057;
    --color-lane-ready: #1971c2;
    --color-lane-inflight: #f08c00;
    --color-lane-review: #845ef7;
    --color-lane-done: #2b8a3e;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.5);
    --shadow-drawer: -4px 0 24px rgba(0,0,0,0.5);
  }
}

[data-theme="light"] {
  --bg-page: #f8f9fa;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f3f5;
  --bg-lane: #e9ecef;
  --bg-header: #212529;
  
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #868e96;
  --text-inverse: #f8f9fa;
  
  --border-color: #dee2e6;
  
  --color-claude: #5c7cfa;
  --color-gemini: #20c997;
  --color-human: #ff922b;
  
  --color-critical: #e03131;
  --color-warning: #f08c00;
  --color-info: #1c7ed6;
  
  --color-lane-backlog: #ced4da;
  --color-lane-ready: #74c0fc;
  --color-lane-inflight: #fab005;
  --color-lane-review: #b197fc;
  --color-lane-done: #51cf66;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-drawer: -4px 0 24px rgba(0,0,0,0.15);
}

[data-theme="dark"] {
  --bg-page: #121212;
  --bg-surface: #1e1e1e;
  --bg-surface-hover: #2c2c2c;
  --bg-lane: #181818;
  --bg-header: #000000;
  
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --text-inverse: #e0e0e0;
  
  --border-color: #333333;
  
  --color-claude: #4263eb;
  --color-gemini: #0ca678;
  --color-human: #d9480f;
  
  --color-critical: #c92a2a;
  --color-warning: #e67700;
  --color-info: #1864ab;
  
  --color-lane-backlog: #495057;
  --color-lane-ready: #1971c2;
  --color-lane-inflight: #f08c00;
  --color-lane-review: #845ef7;
  --color-lane-done: #2b8a3e;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.5);
  --shadow-drawer: -4px 0 24px rgba(0,0,0,0.5);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.4;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

a { color: var(--color-info); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  background-color: var(--bg-header);
  color: var(--text-inverse);
  gap: var(--space-4);
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.drift-alarm {
  background-color: var(--color-critical);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: bold;
}

input, select, button {
  font-family: inherit;
  font-size: var(--font-size-sm);
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  color: var(--text-primary);
}

input:focus, select:focus, button:focus {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

button {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

button:hover { background-color: var(--bg-surface-hover); }

.board-meta {
  padding: var(--space-2) var(--space-4);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

/* Board Container (Lanes) */
.board-container {
  display: flex;
  flex: 1 1 0%;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--space-4);
  gap: var(--space-4);
  align-items: stretch;
}

.lane {
  flex: 1;
  min-width: 250px;
  background-color: var(--bg-lane);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  border-top: 4px solid var(--border-color);
  min-height: 0;
}

.lane[data-lane="backlog"] { border-top-color: var(--color-lane-backlog); }
.lane[data-lane="ready"] { border-top-color: var(--color-lane-ready); }
.lane[data-lane="in-flight"] { border-top-color: var(--color-lane-inflight); }
.lane[data-lane="review"] { border-top-color: var(--color-lane-review); }
.lane[data-lane="done"] { border-top-color: var(--color-lane-done); }

.lane-header {
  padding: var(--space-2);
  border-bottom: 1px solid var(--border-color);
}
.lane-header h2 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.lane-header .count {
  background: var(--border-color);
  padding: 0 var(--space-2);
  border-radius: 12px;
  font-size: var(--font-size-xs);
}

.cards-container {
  padding: var(--space-2);
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 0;
}

/* Task Card */
.task-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.task-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.task-card:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  font-family: var(--font-mono);
}

.task-id { font-weight: bold; }

.task-owner {
  padding: 0 4px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 10px;
  text-transform: uppercase;
}
.owner-claude { background-color: var(--color-claude); }
.owner-gemini { background-color: var(--color-gemini); }
.owner-human { background-color: var(--color-human); }

.card-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.card-meta {
  display: flex;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  flex-wrap: wrap;
}

.card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.task-card.is-blocked {
  border: 2px dashed var(--color-warning);
  background: repeating-linear-gradient(
    45deg,
    var(--bg-surface),
    var(--bg-surface) 10px,
    var(--bg-surface-hover) 10px,
    var(--bg-surface-hover) 20px
  );
}

.blocked-reason {
  font-size: var(--font-size-xs);
  color: var(--color-warning);
  font-weight: bold;
  margin-top: var(--space-1);
}

/* Panels */
.panels-section {
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--space-4);
  gap: var(--space-4);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  flex: 0 0 300px;
  min-height: 0;
}

.panel-container {
  min-width: 300px;
  flex: 1;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-page);
  height: 100%;
  min-height: 0;
}

.panel-container h3 {
  padding: var(--space-2);
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface-hover);
  margin: 0;
}

.panel-controls {
  padding: var(--space-1) var(--space-2);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  gap: var(--space-2);
}

.panel-content {
  flex: 1;
  padding: var(--space-2);
  overflow-y: auto;
  font-size: var(--font-size-sm);
  min-height: 0;
}

.log-entry {
  padding: var(--space-2);
  border-bottom: 1px solid var(--border-color);
}
.log-entry:last-child { border-bottom: none; }
.log-ts { font-family: var(--font-mono); font-size: var(--font-size-xs); color: var(--text-muted); }

/* Drawer */
.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1000;
  display: flex;
  justify-content: flex-end;
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.drawer[aria-hidden="false"] {
  visibility: visible;
  opacity: 1;
}

.drawer-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
}

.drawer-content {
  position: relative;
  width: 100%;
  max-width: 500px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-drawer);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-fast);
}

.drawer[aria-hidden="false"] .drawer-content {
  transform: translateX(0);
}

.drawer-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.drawer-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.drawer-section h4 {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-1);
}

.file-map-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-xs);
}
.file-map-table th, .file-map-table td {
  border: 1px solid var(--border-color);
  padding: var(--space-1) var(--space-2);
  text-align: left;
}

.checklist {
  list-style: none;
  font-size: var(--font-size-sm);
}
.checklist li {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}
.check-icon {
  font-family: var(--font-mono);
  font-weight: bold;
}
.checked { color: var(--color-done); }
.unchecked { color: var(--text-muted); }

/* Responsive */
@media (max-width: 768px) {
  .board-container {
    flex-direction: column;
    overflow-y: auto;
    flex: 1 1 auto;
  }
  .lane {
    flex: none;
    height: 350px;
    min-height: 200px;
  }
  .panels-section {
    flex-direction: column;
    overflow-y: auto;
    flex: 0 0 250px;
  }
  .panel-container {
    min-width: 100%;
    min-height: 150px;
    margin-bottom: var(--space-2);
  }
}