:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-dark: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-secondary: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-light: #334155;
    --border-medium: #475569;
    --border-dark: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
  }
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-light: #334155;
  --border-medium: #475569;
  --border-dark: #64748b;
  --accent-primary: #3b82f6;
  --accent-secondary: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

header {
  text-align: center;
  margin-bottom: 32px;
}

header h1 {
  margin: 0 0 8px 0;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin: 0;
}

.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.h2 {
  margin: 0 0 16px 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.help {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 24px;
}

.hint {
  color: var(--text-muted);
  margin: 8px 0 0;
  font-size: 0.9rem;
}

.controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 24px;
}

.view-controls {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  margin-top: 16px;
  border: 1px solid var(--border-light);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 40px;
}

.view-controls select {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-medium);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.view-controls select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.15);
}

.toggle-group {
  gap: 6px;
}

.toggle-input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-primary);
}

.insights-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  margin-top: 24px;
  box-shadow: var(--shadow-sm);
}

.insights-panel h2 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.insights-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.insight-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 120px;
  box-shadow: var(--shadow-sm);
}

.insight-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.insight-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.insight-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.controls input, .controls select {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-medium);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s ease;
}

.controls input:focus, .controls select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-medium);
  background: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.btn-primary:hover {
  background: #2563eb;
  border-color: #2563eb;
}

.btn-secondary {
  background: var(--accent-secondary);
  color: white;
  border-color: var(--accent-secondary);
}

.btn-secondary:hover {
  background: #059669;
  border-color: #059669;
}

.btn-danger {
  background: var(--accent-danger);
  color: white;
  border-color: var(--accent-danger);
}

.btn-small {
  padding: 6px 10px;
  font-size: 12px;
}

.list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
}

.list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  margin-bottom: 8px;
  background: var(--bg-primary);
  transition: all 0.2s ease;
}

.list li:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-sm);
}

.task-info {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.task-info small {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.list li.highlight {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
  background: var(--bg-secondary);
}

.list .drag {
  cursor: grab;
  color: var(--text-muted);
  font-size: 16px;
}

.list .drag:active {
  cursor: grabbing;
}

.list .rm {
  margin-left: auto;
  border: none;
  background: none;
  color: var(--accent-danger);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  font-size: 16px;
}

.list .rm:hover {
  background: rgb(239 68 68 / 0.1);
}

.task-bar {
  cursor: pointer;
  transition: opacity 0.2s ease, stroke 0.2s ease;
}

.task-bar.is-hovered {
  opacity: 0.85;
  stroke: var(--accent-primary);
  stroke-width: 2;
}

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.spacer {
  flex: 1;
}

.chart {
  overflow: auto;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 16px;
  background: var(--bg-primary);
  min-height: 300px;
}

svg {
  max-width: 100%;
  height: auto;
}

.empty {
  color: var(--text-muted);
  font-style: italic;
  margin: 24px 0;
  text-align: center;
  padding: 48px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  border: 2px dashed var(--border-medium);
}

.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

/* Advanced Features Styles */
.advanced-form {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}

.advanced-form h3 {
  margin: 0 0 20px 0;
  color: var(--text-primary);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

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

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input, .form-group select, .form-group textarea {
  padding: 10px 12px;
  border: 1px solid var(--border-medium);
  border-radius: 6px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
}

.form-group textarea {
  resize: vertical;
  min-height: 60px;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-primary);
  border-radius: 12px;
  padding: 24px;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal.large {
  max-width: 700px;
}

.modal h3 {
  margin: 0 0 20px 0;
  color: var(--text-primary);
}

/* Resource Management */
.resource-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto auto;
  gap: 12px;
  margin-bottom: 20px;
  align-items: end;
}

.resource-list {
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  margin-bottom: 20px;
}

.resource-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--border-light);
}

.resource-item:last-child {
  border-bottom: none;
}

.resource-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.role {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 12px;
  display: inline-block;
  width: fit-content;
}

.email {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Context Menu */
.context-menu {
  position: absolute;
  background: var(--bg-primary);
  border: 1px solid var(--border-medium);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  min-width: 160px;
}

.context-item {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 14px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.context-item:last-child {
  border-bottom: none;
}

.context-item:hover {
  background: var(--bg-tertiary);
}

/* Progress Indicators */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border-light);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent-secondary);
  transition: width 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 16px;
  }
  
  .controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  .view-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .control-group {
    justify-content: space-between;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .resource-form {
    grid-template-columns: 1fr;
  }
  
  .modal {
    margin: 20px;
    width: calc(100% - 40px);
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 2rem;
  }
  
  .panel {
    padding: 16px;
  }
  
  .btn {
    padding: 8px 12px;
    font-size: 13px;
  }
}
.today-line {
  stroke: var(--accent-primary);
  stroke-width: 2;
  stroke-dasharray: 4 4;
  opacity: 0.9;
}