:root {
  --color-bg: #F8FAFC;
  --color-sidebar: #FFFFFF;
  --color-card: #FFFFFF;
  --color-text: #0F172A;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  --color-accent: #3B82F6;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
[data-theme="dark"] {
  --color-bg: #0F172A;
  --color-sidebar: #1E293B;
  --color-card: #1E293B;
  --color-text: #F1F5F9;
  --color-text-muted: #94A3B8;
  --color-border: #334155;
}

* {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: 'DM Sans', sans-serif;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'DM Serif Display', serif;
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
}

.sidebar {
  width: 260px;
  background: var(--color-sidebar);
  border-right: 1px solid var(--color-border);
}

.sidebar-collapsed {
  width: 64px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: 8px;
  color: var(--color-text-muted);
  transition: var(--transition);
  cursor: pointer;
}

.sidebar-item:hover {
  background: rgba(59, 130, 246, 0.08);
  color: var(--color-accent);
}

.sidebar-item.active {
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-accent);
  border-left: 3px solid var(--color-accent);
}

.sidebar-item svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.kanban-column {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  min-width: 280px;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 180px);
}

.kanban-column-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  border-radius: 12px 12px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kanban-column-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  gap: 10px;
  display: flex;
  flex-direction: column;
}

.task-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-left-width: 4px;
  border-radius: 10px;
  padding: 12px;
  cursor: grab;
  transition: var(--transition);
}

.task-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}

.task-card.dragging {
  opacity: 0.5;
  cursor: grabbing;
}

.priority-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  color: #fff;
}

.priority-critical {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.skeleton {
  background: linear-gradient(90deg, var(--color-border) 25%, rgba(255,255,255,0.3) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}

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

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 14px 20px;
  border-radius: 10px;
  color: #fff;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  animation: toastIn 0.3s ease-out;
}

.toast-success { background: #10B981; }
.toast-error { background: #EF4444; }
.toast-info { background: #3B82F6; }

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.task-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: 75%;
  max-width: 900px;
  background: var(--color-card);
  border-left: 1px solid var(--color-border);
  z-index: 1000;
  transform: translateX(100%);
  transition: transform 0.25s ease-out;
  display: flex;
  flex-direction: column;
}

.task-sidebar.open {
  transform: translateX(0);
}

.task-sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(2px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease-out;
}

.task-sidebar-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 768px) {
  .task-sidebar { width: 100%; max-width: 100%; }
  .kanban-column { min-width: 85vw; max-width: 85vw; }
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

.empty-state svg { width: 80px; height: 80px; margin-bottom: 12px; opacity: 0.5; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--color-text-muted); }

.timeline-item {
  position: relative;
  padding-left: 24px;
  padding-bottom: 16px;
  border-left: 2px solid var(--color-border);
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}
.timeline-item:last-child { border-left-color: transparent; }

.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  z-index: 50;
  max-height: 400px;
  overflow-y: auto;
}

.search-dropdown .group-title {
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: rgba(0,0,0,0.03);
}

[data-theme="dark"] .search-dropdown .group-title {
  background: rgba(255,255,255,0.03);
}

.daily-plan-block {
  position: absolute;
  left: 60px;
  right: 12px;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  cursor: grab;
}