:root {
  --bg:              #f8f9fa;
  --bg-surface:      #fff;
  --bg-alt:          #fafafa;
  --bg-header:       #f3f4f6;
  --border:          #e0e0e0;
  --border-light:    #e5e7eb;
  --border-lighter:  #d1d5db;
  --row-divider:     #f0f0f0;
  --text-primary:    #333;
  --text-emphasis:   #111827;
  --text-strong:     #374151;
  --text-secondary:  #6b7280;
  --text-muted:      #9ca3af;
  --text-muted2:     #d1d5db;
}

[data-theme="dark"] {
  --bg:              #0f172a;
  --bg-surface:      #1e293b;
  --bg-alt:          #182234;
  --bg-header:       #253147;
  --border:          #334155;
  --border-light:    #2d3f55;
  --border-lighter:  #3a4f6a;
  --row-divider:     #1e2d42;
  --text-primary:    #e2e8f0;
  --text-emphasis:   #f1f5f9;
  --text-strong:     #cbd5e1;
  --text-secondary:  #94a3b8;
  --text-muted:      #64748b;
  --text-muted2:     #475569;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
.hidden { display: none !important; }

body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
       background: var(--bg); color: var(--text-primary); }

.toolbar { display: flex; align-items: center; justify-content: space-between;
           padding: 12px 20px; background: var(--bg-surface); border-bottom: 1px solid var(--border);
           position: sticky; top: 0; z-index: 10; }

.toolbar__title-group { display: flex; align-items: center; gap: 8px; }
.toolbar__title { font-size: 20px; font-weight: 600; }
#title-source-link { color: var(--text-muted); line-height: 0; }
#title-source-link:hover { color: #2563eb; }
#title-source-link .icon-link-broken { display: none; }
#title-source-link.modified { color: #f59e0b; cursor: pointer; }
#title-source-link.modified:hover { color: #d97706; }
#title-source-link.modified .icon-link { display: none; }
#title-source-link.modified .icon-link-broken { display: block; }
.toolbar__actions { display: flex; gap: 8px; align-items: center; }
.zoom-controls { display: flex; align-items: center; gap: 4px; }
#zoom-label { font-size: 13px; min-width: 52px; text-align: center; }

.btn { padding: 7px 16px; border: 1px solid #ccc; border-radius: 6px;
       background: var(--bg-surface); cursor: pointer; font-size: 14px; color: var(--text-primary); }
.btn:hover { background: var(--bg-alt); }
.btn--icon { padding: 7px 10px; line-height: 0; }
.btn--icon svg { display: block; }
.btn--primary { background: #2563eb; color: #fff; border-color: #2563eb; }
.btn--primary:hover { background: #1d4ed8; }
.btn--danger { background: #dc2626; color: #fff; border-color: #dc2626; }

.readonly-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 4px;
  border: none;
  background: #f59e0b;
  color: #fff;
  cursor: pointer;
}
.readonly-badge:hover { background: #d97706; }

.btn--theme {
  padding: 7px 10px;
  border: none;
  background: transparent;
  cursor: pointer;
  line-height: 0;
  color: var(--text-primary);
}
.btn--theme:hover { opacity: 0.6; }

/* Light mode: show moon, hide sun */
#btn-theme .icon-sun { display: none; }
#btn-theme .icon-moon { display: block; }

/* Dark mode: show sun, hide moon */
[data-theme="dark"] #btn-theme .icon-sun { display: block; }
[data-theme="dark"] #btn-theme .icon-moon { display: none; }

.legend { display: flex; gap: 16px; padding: 10px 20px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; }

.chart-container { overflow-x: auto; padding: 0 20px 20px; position: relative; }
#roadmap-svg { display: block; min-width: 100%; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4);
                 display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal-overlay.hidden { display: none; }
.modal { background: var(--bg-surface); border-radius: 10px; padding: 24px; min-width: 360px; max-width: 480px; width: 100%; }
.modal h2 { margin-bottom: 16px; font-size: 18px; }
.modal-field { margin-bottom: 14px; }
.modal-field label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 4px; }
.modal-field input, .modal-field textarea, .modal-field select { width: 100%; padding: 8px 10px; border: 1px solid #ccc;
                     border-radius: 6px; font-size: 14px; box-sizing: border-box;
                     background: var(--bg-surface); color: var(--text-primary); }
.modal-field select { background: var(--bg-surface); }
.modal-field textarea { resize: vertical; font-family: monospace; }
.modal-field input[type="color"] {
  width: 56px;
  height: 36px;
  padding: 2px 4px;
  cursor: pointer;
}
.modal__actions { display: flex; gap: 8px; margin-top: 20px; }

.toast { position: fixed; bottom: 24px; right: 24px; padding: 10px 18px;
         border-radius: 8px; font-size: 14px; z-index: 200; animation: fadeIn .2s; }
.toast--error { background: #dc2626; color: #fff; }
.toast--ok    { background: #16a34a; color: #fff; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; } }

[data-action="reorder-group"] { cursor: grab; }
[data-action="reorder-group"]:active { cursor: grabbing; }

#task-popup {
  position: absolute;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 8px 12px;
  pointer-events: none;
  box-shadow: 0 4px 16px rgba(0,0,0,0.10);
  font-size: 13px;
  z-index: 50;
  min-width: 100px;
  max-width: 260px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 150ms ease-out, transform 150ms ease-out;
}
#task-popup.visible {
  opacity: 1;
  transform: translateY(0);
}
#task-popup-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--text-emphasis);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#task-popup-dates {
  color: var(--text-secondary);
  font-size: 11px;
  margin-top: 2px;
  margin-bottom: 6px;
}
#task-popup-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
}
#task-popup-tags:empty { display: none; margin-bottom: 0; }
.tag-pill {
  padding: 2px 8px;
  border-radius: 10px;
  color: #fff;
  font-size: 11px;
  font-weight: 500;
}
#task-popup-assignee {
  color: var(--text-strong);
  display: flex;
  align-items: center;
  gap: 5px;
}
#task-popup-assignee:empty { display: none; }

#empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: calc(100vh - 120px);
}
#empty-state.hidden { display: none; }
.empty-state__content {
  text-align: center;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.empty-state__content h2 { font-size: 20px; color: var(--text-emphasis); }
.empty-state__content p  { font-size: 14px; color: var(--text-secondary); line-height: 1.5; }
.empty-state__icon { color: var(--text-muted2); margin-bottom: 4px; }

.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-surface);
  flex-wrap: wrap;
}
.filter-bar.hidden { display: none; }
.filter-select {
  padding: 5px 8px;
  border: 1px solid var(--border-lighter);
  border-radius: 6px;
  font-size: 13px;
  background: var(--bg-surface);
  cursor: pointer;
  color: var(--text-strong);
}
.btn--filter {
  padding: 5px 12px;
  font-size: 13px;
  border: 1px solid var(--border-lighter);
  border-radius: 6px;
  background: var(--bg-surface);
  cursor: pointer;
  color: var(--text-strong);
}
.btn--filter:hover { background: var(--bg-header); }
.btn--filter.active { background: #dbeafe; border-color: #2563eb; color: #1d4ed8; }
.btn--icon.active { background: #dbeafe; border-color: #2563eb; color: #1d4ed8; }
.btn--filter-clear {
  padding: 5px 12px;
  font-size: 13px;
  border: 1px solid #fca5a5;
  border-radius: 6px;
  background: var(--bg-surface);
  cursor: pointer;
  color: #dc2626;
}
.btn--filter-clear:hover { background: #fee2e2; }
.btn--filter-clear.hidden { display: none; }
#btn-collapse-all.hidden,
#btn-expand-all.hidden { display: none; }

.template-picker {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.template-picker.hidden { display: none; }
.template-picker__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.4); }
.template-picker__panel {
  position: relative; background: var(--bg-surface); border-radius: 12px;
  padding: 28px; width: 660px; max-width: calc(100vw - 40px);
  max-height: 85vh; overflow-y: auto;
}
.template-picker__title { font-size: 18px; font-weight: 600; margin-bottom: 20px; color: var(--text-emphasis); }
.template-picker__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 20px; }
.template-card {
  border: 2px solid var(--border-light); border-radius: 8px; padding: 16px 18px;
  cursor: pointer; text-align: left; background: var(--bg-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.template-card:hover { border-color: #2563eb; box-shadow: 0 2px 8px rgba(37,99,235,0.12); }
.template-card__icon { font-size: 22px; margin-bottom: 8px; }
.template-card__name { font-weight: 600; font-size: 14px; color: var(--text-emphasis); margin-bottom: 4px; }
.template-card__desc { font-size: 13px; color: var(--text-secondary); line-height: 1.45; }

.multiselect-list {
  max-height: 130px; overflow-y: auto;
  border: 1px solid #ccc; border-radius: 6px;
  padding: 2px 4px;
}
.multiselect-list__item {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 6px; border-radius: 4px; cursor: pointer;
}
.multiselect-list__item:hover { background: var(--bg-header); }
.multiselect-list__item input[type="checkbox"] {
  width: 14px; height: 14px; flex-shrink: 0;
  cursor: pointer; accent-color: #2563eb; margin: 0;
}
.multiselect-list__item label {
  font-size: 14px; font-weight: normal; margin-bottom: 0;
  cursor: pointer; user-select: none;
}
.multiselect-list--empty { color: var(--text-muted); font-size: 13px; padding: 6px 8px; }

#task-popup-notes {
  color: var(--text-secondary); font-size: 12px; margin-top: 4px;
  white-space: pre-wrap; line-height: 1.4;
}
.template-card--blank { border-style: dashed; }

.site-footer {
  text-align: center;
  padding: 16px 20px;
  font-size: 12px;
  color: var(--text-muted);
}
.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: #2563eb; }
.site-footer a:hover .site-footer__heart { color: #ef4444; }
[data-theme="dark"] .site-footer,
[data-theme="dark"] .site-footer a { color: var(--text-secondary); }