@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --sidebar-width: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-glass);
  display: flex; flex-direction: column;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-logo {
  padding: 24px 20px;
  display: flex; align-items: center; gap: 12px;
  border-bottom: 1px solid var(--border-glass);
}

.sidebar-logo .logo-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; color: white;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.sidebar-logo h1 {
  font-size: 1.2rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), #c084fc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.sidebar-logo span { font-size: 0.7rem; color: var(--text-muted); display: block; margin-top: 2px; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: 12px 0; }
.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 3px; }

.nav-section { padding: 8px 20px 4px; margin-top: 8px; }
.nav-section-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); font-weight: 600; }

.nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 20px; cursor: pointer;
  color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
  transition: var(--transition); border-left: 3px solid transparent;
  position: relative;
}
.nav-item:hover { background: var(--bg-glass); color: var(--text-primary); }
.nav-item.active {
  color: var(--accent-light); background: rgba(99, 102, 241, 0.08);
  border-left-color: var(--accent);
}
.nav-item .icon { font-size: 1.1rem; width: 24px; text-align: center; }
.nav-item .badge {
  margin-left: auto; background: var(--danger); color: white;
  font-size: 0.65rem; padding: 2px 7px; border-radius: 10px; font-weight: 600;
}

/* ===== MAIN ===== */
.main {
  margin-left: var(--sidebar-width);
  height: 100vh; display: flex; flex-direction: column;
  background: var(--bg-primary);
}

/* ===== HEADER ===== */
.header {
  padding: 16px 32px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border-glass);
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.header-left h2 { font-size: 1.4rem; font-weight: 700; }
.header-left p { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
.header-right { display: flex; align-items: center; gap: 12px; }

.search-box {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  border-radius: var(--radius); padding: 8px 16px;
}
.search-box input {
  background: none; border: none; outline: none;
  color: var(--text-primary); font-size: 0.85rem; width: 200px;
  font-family: 'Inter', sans-serif;
}
.search-box input::placeholder { color: var(--text-muted); }

.header-btn {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  color: var(--text-secondary); cursor: pointer;
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  transition: var(--transition);
}
.header-btn:hover { background: var(--border-glass); color: var(--text-primary); }
.header-btn.has-notif::after {
  content: ''; position: absolute; top: -2px; right: -2px;
  width: 8px; height: 8px; background: var(--danger); border-radius: 50%;
}

.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a855f7);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700; color: white; cursor: pointer;
}

/* ===== CONTENT ===== */
.content {
  flex: 1; overflow-y: auto; padding: 28px 32px;
  scrollbar-width: thin; scrollbar-color: var(--border-glass) transparent;
}
.content::-webkit-scrollbar { width: 6px; }
.content::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 3px; }

/* ===== CARDS ===== */
.kpi-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 28px;
}
.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 20px;
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative; overflow: hidden;
}
.kpi-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0; transition: var(--transition);
}
.kpi-card:hover { transform: translateY(-2px); border-color: rgba(99, 102, 241, 0.2); }
.kpi-card:hover::before { opacity: 1; }
.kpi-card .kpi-icon {
  width: 42px; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; margin-bottom: 14px;
}
.kpi-card .kpi-icon.blue { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.kpi-card .kpi-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.kpi-card .kpi-icon.purple { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }
.kpi-card .kpi-icon.orange { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.kpi-card .kpi-icon.red { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.kpi-card .kpi-value { font-size: 1.8rem; font-weight: 800; line-height: 1; }
.kpi-card .kpi-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 6px; text-transform: uppercase; letter-spacing: 0.5px; }

/* ===== PANELS ===== */
.panel-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; margin-bottom: 28px; }
.panel-grid.equal { grid-template-columns: 1fr 1fr; }

.panel {
  background: var(--bg-card); border: 1px solid var(--border-glass);
  border-radius: var(--radius); backdrop-filter: blur(10px); overflow: hidden;
}
.panel-header {
  padding: 16px 20px; display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border-glass);
}
.panel-header h3 { font-size: 0.95rem; font-weight: 600; }
.panel-header .panel-action {
  font-size: 0.75rem; color: var(--accent-light); cursor: pointer;
  background: none; border: none; font-family: 'Inter',sans-serif; font-weight: 500;
}
.panel-header .panel-action:hover { text-decoration: underline; }
.panel-body { padding: 16px 20px; }

/* ===== TABLE ===== */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  text-align: left; padding: 10px 12px; font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted);
  border-bottom: 1px solid var(--border-glass); font-weight: 600;
}
.data-table td {
  padding: 12px 12px; font-size: 0.85rem; border-bottom: 1px solid var(--border-glass);
  color: var(--text-secondary);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr { transition: var(--transition); }
.data-table tr:hover td { background: var(--bg-glass); color: var(--text-primary); }

/* ===== BADGES ===== */
.badge-status {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 20px; font-size: 0.72rem; font-weight: 600;
}
.badge-status::before { content: ''; width: 6px; height: 6px; border-radius: 50%; }
.badge-status.open { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.badge-status.open::before { background: #60a5fa; }
.badge-status.in_progress { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.badge-status.in_progress::before { background: #fbbf24; }
.badge-status.resolved { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.badge-status.resolved::before { background: #34d399; }
.badge-status.closed { background: rgba(100, 116, 139, 0.15); color: #94a3b8; }
.badge-status.closed::before { background: #94a3b8; }

.badge-priority {
  padding: 3px 10px; border-radius: 20px; font-size: 0.72rem; font-weight: 600;
}
.badge-priority.critical { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.badge-priority.high { background: rgba(249, 115, 22, 0.2); color: #fb923c; }
.badge-priority.medium { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.badge-priority.low { background: rgba(16, 185, 129, 0.15); color: #34d399; }

/* ===== TREE VIEW ===== */
.tree-view { list-style: none; }
.tree-node { margin: 2px 0; }
.tree-node-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: var(--radius-sm); cursor: pointer;
  transition: var(--transition); font-size: 0.85rem;
}
.tree-node-header:hover { background: var(--bg-glass); }
.tree-node-header .node-icon { font-size: 1rem; width: 22px; text-align: center; }
.tree-node-header .node-toggle { font-size: 0.7rem; width: 16px; color: var(--text-muted); transition: var(--transition); }
.tree-node-header .node-toggle.open { transform: rotate(90deg); }
.tree-node-header .node-label { font-weight: 500; }
.tree-node-header .node-meta { margin-left: auto; font-size: 0.72rem; color: var(--text-muted); }
.tree-children { padding-left: 24px; display: none; }
.tree-children.open { display: block; }

/* ===== PAGE VIEWS ===== */
.page { display: none; }
.page.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ===== FULL TABLE PAGE ===== */
.page-actions { display: flex; gap: 10px; margin-bottom: 20px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: var(--radius-sm); font-size: 0.82rem;
  font-weight: 600; cursor: pointer; transition: var(--transition);
  font-family: 'Inter', sans-serif; border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: white; box-shadow: 0 4px 15px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); }
.btn-ghost {
  background: var(--bg-glass); color: var(--text-secondary);
  border: 1px solid var(--border-glass);
}
.btn-ghost:hover { background: var(--border-glass); color: var(--text-primary); }
.filter-select {
  background: var(--bg-glass); border: 1px solid var(--border-glass);
  color: var(--text-secondary); padding: 8px 12px; border-radius: var(--radius-sm);
  font-size: 0.82rem; font-family: 'Inter', sans-serif; outline: none;
}
.filter-select option { background: var(--bg-secondary); }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  z-index: 1000; display: none; align-items: center; justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border-glass);
  border-radius: var(--radius); width: 520px; max-height: 80vh; overflow-y: auto;
  box-shadow: 0 25px 50px rgba(0,0,0,0.5);
}
.modal-header {
  padding: 20px 24px; border-bottom: 1px solid var(--border-glass);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-header h3 { font-size: 1.05rem; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.3rem; }
.modal-body { padding: 20px 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border-glass); display: flex; gap: 10px; justify-content: flex-end; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.78rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 14px; background: var(--bg-glass);
  border: 1px solid var(--border-glass); border-radius: var(--radius-sm);
  color: var(--text-primary); font-size: 0.85rem; font-family: 'Inter', sans-serif;
  outline: none; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group textarea { min-height: 80px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ===== CHART placeholder ===== */
.chart-bar-container { display: flex; align-items: flex-end; gap: 12px; height: 150px; padding-top: 10px; }
.chart-bar-item { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.chart-bar {
  width: 100%; border-radius: 6px 6px 0 0; min-height: 8px;
  transition: height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.chart-bar-label { font-size: 0.68rem; color: var(--text-muted); text-align: center; }
.chart-bar-value { font-size: 0.75rem; font-weight: 700; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .panel-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .content { padding: 16px; }
  .header { padding: 12px 16px; }
}