:root {
  --cu-purple: #7b68ee;
  --cu-purple-dark: #6a5ae0;
  --cu-purple-light: #ede9fe;
  --cu-bg: #ffffff;
  --cu-bg-gray: #f7f8fa;
  --cu-bg-hover: #f0f1f3;
  --cu-border: #e5e7eb;
  --cu-text: #1f2937;
  --cu-text-secondary: #6b7280;
  --cu-text-muted: #9ca3af;
  --cu-green: #10b981;
  --cu-red: #ef4444;
  --cu-orange: #f59e0b;
  --cu-blue: #3b82f6;
  --cu-sidebar-width: 240px;
  --cu-header-height: 56px;
  --cu-radius: 8px;
  --cu-radius-lg: 12px;
  --cu-shadow: 0 1px 2px rgba(0,0,0,0.05);
  --cu-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07);
  --cu-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--cu-bg);
  color: var(--cu-text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ClickUp-style sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--cu-sidebar-width);
  background: var(--cu-bg);
  border-right: 1px solid var(--cu-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 16px 20px;
  border-bottom: 1px solid var(--cu-border);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--cu-text);
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--cu-purple);
  border-radius: var(--cu-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
}

.sidebar-nav { padding: 12px 0; flex: 1; }

.sidebar-section {
  padding: 8px 20px 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--cu-text-muted);
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  color: var(--cu-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
  cursor: pointer;
  border-left: 3px solid transparent;
}

.sidebar-item:hover {
  background: var(--cu-bg-hover);
  color: var(--cu-text);
}

.sidebar-item.active {
  background: var(--cu-purple-light);
  color: var(--cu-purple);
  border-left-color: var(--cu-purple);
}

.sidebar-item-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.sidebar-item-badge {
  margin-left: auto;
  background: var(--cu-purple);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
}

/* Main content area */
.main-content {
  margin-left: var(--cu-sidebar-width);
  min-height: 100vh;
}

/* ClickUp-style header */
.header {
  height: var(--cu-header-height);
  background: var(--cu-bg);
  border-bottom: 1px solid var(--cu-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--cu-text);
}

.header-search {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.header-search input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 1px solid var(--cu-border);
  border-radius: var(--cu-radius);
  background: var(--cu-bg-gray);
  font-size: 14px;
  color: var(--cu-text);
  transition: all 0.15s;
}

.header-search input:focus {
  outline: none;
  border-color: var(--cu-purple);
  background: var(--cu-bg);
  box-shadow: 0 0 0 3px var(--cu-purple-light);
}

.header-search::before {
  content: '🔍';
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  opacity: 0.5;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--cu-radius);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: background 0.15s;
}

.header-btn:hover { background: var(--cu-bg-hover); }

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--cu-purple);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}

/* Page content */
.page-content {
  padding: 24px;
  max-width: 1200px;
}

/* ClickUp-style cards */
.cu-card {
  background: var(--cu-bg);
  border: 1px solid var(--cu-border);
  border-radius: var(--cu-radius-lg);
  box-shadow: var(--cu-shadow);
  margin-bottom: 16px;
  overflow: hidden;
}

.cu-card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--cu-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.cu-card-header-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--cu-radius);
  background: var(--cu-purple-light);
  color: var(--cu-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.cu-card-header-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--cu-text);
}

.cu-card-header-subtitle {
  font-size: 12px;
  color: var(--cu-text-secondary);
  margin-top: 2px;
}

.cu-card-body { padding: 20px; }

/* ClickUp-style form elements */
.cu-input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--cu-border);
  border-radius: var(--cu-radius);
  background: var(--cu-bg);
  color: var(--cu-text);
  font-size: 14px;
  font-family: inherit;
  transition: all 0.15s;
}

.cu-input:focus {
  outline: none;
  border-color: var(--cu-purple);
  box-shadow: 0 0 0 3px var(--cu-purple-light);
}

.cu-input::placeholder { color: var(--cu-text-muted); }

.cu-textarea {
  width: 100%;
  min-height: 80px;
  padding: 10px 14px;
  border: 1px solid var(--cu-border);
  border-radius: var(--cu-radius);
  background: var(--cu-bg);
  color: var(--cu-text);
  font-size: 14px;
  font-family: 'Consolas', monospace;
  resize: vertical;
  transition: all 0.15s;
}

.cu-textarea:focus {
  outline: none;
  border-color: var(--cu-purple);
  box-shadow: 0 0 0 3px var(--cu-purple-light);
}

.cu-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  cursor: pointer;
  font-size: 14px;
  color: var(--cu-text);
}

.cu-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--cu-purple);
  cursor: pointer;
}

/* ClickUp-style buttons */
.cu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--cu-radius);
  background: var(--cu-purple);
  color: white;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.cu-btn:hover { background: var(--cu-purple-dark); }
.cu-btn:active { transform: scale(0.98); }

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

.cu-btn-secondary:hover { background: var(--cu-bg-hover); }

.cu-btn-success { background: var(--cu-green); }
.cu-btn-success:hover { background: #0da271; }

.cu-btn-danger { background: var(--cu-red); }
.cu-btn-danger:hover { background: #dc2626; }

.cu-btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

/* ClickUp-style toggle */
.cu-toggle {
  position: relative;
  width: 40px;
  height: 22px;
  background: var(--cu-border);
  border-radius: 11px;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}

.cu-toggle.active { background: var(--cu-purple); }

.cu-toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.cu-toggle.active::after { transform: translateX(18px); }

/* ClickUp-style badge */
.cu-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.cu-badge-purple { background: var(--cu-purple-light); color: var(--cu-purple); }
.cu-badge-green { background: #d1fae5; color: #065f46; }
.cu-badge-red { background: #fee2e2; color: #991b1b; }
.cu-badge-orange { background: #fef3c7; color: #92400e; }

/* ClickUp-style table */
.cu-table {
  width: 100%;
  border-collapse: collapse;
}

.cu-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--cu-text-secondary);
  border-bottom: 1px solid var(--cu-border);
  background: var(--cu-bg-gray);
}

.cu-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--cu-border);
  font-size: 14px;
}

.cu-table tr:hover td { background: var(--cu-bg-gray); }

/* ClickUp-style tabs */
.cu-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--cu-border);
  padding: 0 20px;
}

.cu-tab {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--cu-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}

.cu-tab:hover { color: var(--cu-text); }

.cu-tab.active {
  color: var(--cu-purple);
  border-bottom-color: var(--cu-purple);
}

/* ClickUp-style progress bar */
.cu-progress {
  height: 6px;
  background: var(--cu-border);
  border-radius: 3px;
  overflow: hidden;
}

.cu-progress-bar {
  height: 100%;
  background: var(--cu-purple);
  border-radius: 3px;
  transition: width 0.3s;
}

/* ClickUp-style tooltip */
.cu-tooltip {
  position: relative;
}

.cu-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 10px;
  background: var(--cu-text);
  color: white;
  font-size: 12px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  margin-bottom: 8px;
}

.cu-tooltip:hover::after { opacity: 1; }

/* Viewer iframe */
.viewer-frame {
  width: 100%;
  height: calc(100vh - var(--cu-header-height) - 48px);
  border: none;
  background: var(--cu-bg);
}

/* Alert banner */
.cu-alert {
  padding: 14px 18px;
  border-radius: var(--cu-radius);
  margin-bottom: 16px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.cu-alert-warning {
  background: #fef3c7;
  border: 1px solid #fcd34d;
  color: #92400e;
}

.cu-alert-success {
  background: #d1fae5;
  border: 1px solid #6ee7b7;
  color: #065f46;
}

.cu-alert a { color: var(--cu-purple); font-weight: 600; }

/* Status indicator */
.cu-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--cu-text-secondary);
}

.cu-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cu-green);
}

.cu-status-dot.inactive { background: var(--cu-text-muted); }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
  .header-search { display: none; }
}