:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --card-2: #f8fafc;
  --sidebar: #0f172a;
  --sidebar-hover: #1e293b;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-2: #7c3aed;
  --success: #16a34a;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

body {
  min-height: 100vh;
}

#app {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

#app.dark {
  --bg: #0b1220;
  --card: #111827;
  --card-2: #0f172a;
  --sidebar: #07101f;
  --sidebar-hover: #182235;
  --text: #f3f4f6;
  --muted: #94a3b8;
  --border: #223046;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 270px;
  background: var(--sidebar);
  color: #fff;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.logo-box {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 30px;
}

.logo-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.logo-box h2 {
  margin: 0 0 4px;
  font-size: 28px;
}

.logo-box p {
  margin: 0;
  color: #cbd5e1;
  font-size: 13px;
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-links a {
  text-decoration: none;
  color: #dbeafe;
  padding: 13px 14px;
  border-radius: 14px;
  font-weight: 600;
  transition: all 0.25s ease;
}

.nav-links a:hover,
.nav-links a.router-link-exact-active {
  background: var(--sidebar-hover);
  color: #fff;
}

.sidebar-footer {
  margin-top: 20px;
}

.mini-card {
  background: rgba(255, 255, 255, 0.08);
  padding: 16px;
  border-radius: 16px;
}

.mini-label {
  margin: 0 0 6px;
  color: #cbd5e1;
  font-size: 12px;
}

.main-content {
  flex: 1;
  padding: 30px;
  width: 100%;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 34px;
}

.page-header p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.primary-btn,
.secondary-btn,
.danger-btn,
.tab-btn,
.ghost-btn {
  border: none;
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s ease;
  font-size: 14px;
}

.primary-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.18);
}

.primary-btn:hover {
  transform: translateY(-2px);
}

.secondary-btn {
  background: var(--card-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.secondary-btn:hover,
.ghost-btn:hover,
.danger-btn:hover {
  transform: translateY(-1px);
}

.danger-btn {
  background: var(--danger);
  color: #fff;
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.stats-grid {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.stat-card {
  flex: 1;
  min-width: 220px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: 0.25s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
}

.stat-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.stat-label {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 6px;
}

.stat-subtext {
  color: var(--muted);
  font-size: 13px;
}

.content-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.panel {
  flex: 1;
  min-width: 320px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.panel h3 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 22px;
}

.progress-wrap {
  margin-top: 14px;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
}

.dark .progress-bar {
  background: #1f2937;
}

.progress-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  transition: width 0.3s ease;
}

.info-list {
  display: grid;
  gap: 10px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.quick-list {
  display: grid;
  gap: 12px;
}

.quick-item {
  padding: 16px;
  border-radius: 16px;
  background: rgba(37, 99, 235, 0.06);
}

.dark .quick-item {
  background: rgba(255, 255, 255, 0.04);
}

.quick-item strong {
  display: block;
  margin-bottom: 5px;
}

.section-title {
  margin: 28px 0 16px;
  font-size: 24px;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.search-input,
.select-input,
.form-input,
.form-textarea {
  width: 100%;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 13px 14px;
  font-size: 14px;
  outline: none;
}

.search-input {
  min-width: 280px;
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: transparent;
}

.task-list {
  display: grid;
  gap: 16px;
}

.task-item {
  background: var(--card);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-left: 5px solid transparent;
  transition: 0.25s ease;
}

.task-item:hover {
  transform: translateY(-3px);
}

.task-item.high-priority {
  border-left-color: var(--danger);
}

.task-item.medium-priority {
  border-left-color: var(--warning);
}

.task-item.low-priority {
  border-left-color: var(--success);
}

.task-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.task-title {
  margin: 0 0 6px;
  font-size: 19px;
}

.task-desc {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 14px;
}

.task-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.task-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.badge,
.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.badge.low {
  background: #dcfce7;
  color: #166534;
}

.badge.medium {
  background: #fef3c7;
  color: #92400e;
}

.badge.high {
  background: #fee2e2;
  color: #991b1b;
}

.status-pill {
  background: var(--card-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.form-layout {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.form-panel,
.preview-panel {
  flex: 1;
  min-width: 320px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.form-grid {
  display: grid;
  gap: 14px;
}

.preview-box {
  border: 1px dashed var(--border);
  border-radius: 18px;
  padding: 16px;
}

.preview-box h4 {
  margin: 0 0 10px;
  font-size: 20px;
}

.empty-state {
  background: var(--card);
  border: 2px dashed var(--border);
  border-radius: 20px;
  padding: 54px 20px;
  text-align: center;
}

.empty-state h3 {
  margin: 0 0 10px;
}

.empty-state p {
  margin: 0;
  color: var(--muted);
}

.settings-box {
  display: grid;
  gap: 18px;
  max-width: 760px;
}

.setting-item {
  background: var(--card);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.setting-item h3 {
  margin: 0 0 6px;
}

.board {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.board-column {
  flex: 1;
  min-width: 280px;
  background: var(--card);
  border-radius: 20px;
  padding: 18px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.board-column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.board-column-header h3 {
  margin: 0;
  font-size: 20px;
}

.column-count {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
}

.drop-zone {
  min-height: 260px;
  border-radius: 16px;
  transition: 0.2s ease;
}

.drop-zone.drag-over {
  background: rgba(37, 99, 235, 0.08);
  outline: 2px dashed rgba(37, 99, 235, 0.35);
}

.board-task {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-left: 5px solid transparent;
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 12px;
  cursor: grab;
  transition: 0.2s ease;
}

.board-task:hover {
  transform: translateY(-2px);
}

.board-task.high-priority {
  border-left-color: var(--danger);
}

.board-task.medium-priority {
  border-left-color: var(--warning);
}

.board-task.low-priority {
  border-left-color: var(--success);
}

.board-task h4 {
  margin: 0 0 8px;
  font-size: 16px;
}

.board-task p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.board-task-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.drag-hint {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.25s ease;
}

.fade-enter,
.fade-leave-to {
  opacity: 0;
}

@media (max-width: 992px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .main-content {
    padding: 20px;
  }
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 28px;
  }

  .search-input {
    min-width: 100%;
  }

  .toolbar-left,
  .toolbar-right {
    width: 100%;
  }

  .stats-grid,
  .content-grid,
  .form-layout,
  .board {
    flex-direction: column;
  }
}