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

:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #475569;
  --color-text-tertiary: #64748b;
  --color-border: #e2e8f0;
  --color-primary: #ff8c00;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  --color-info: #3b82f6;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

/* ========== LOGIN ========== */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-screen.hidden {
  display: none;
}

.login-container {
  max-width: 400px;
  width: 90%;
}

.login-box {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.login-logo-container {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-xl) auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
}

.login-particle-canvas {
  width: 100%;
  height: 100%;
  border-radius: 12px;
}

.login-box h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
  text-align: center;
}

.subtitle {
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: 14px;
  margin-bottom: var(--spacing-xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  font-size: 14px;
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  background: var(--color-surface);
  color: var(--color-text);
  transition: all 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.btn-login {
  width: 100%;
  padding: 10px;
  background: linear-gradient(135deg, var(--color-primary), #ff6b35);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 140, 0, 0.3);
}

.login-footer {
  text-align: center;
  margin-top: var(--spacing-lg);
  color: var(--color-text-tertiary);
  font-size: 12px;
}

/* ========== APP LAYOUT ========== */
.app {
  display: flex;
  height: 100vh;
}

.app.hidden {
  display: none;
}

/* ========== SIDEBAR ========== */
.sidebar {
  width: 260px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: var(--shadow-sm);
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.sidebar-logo-container {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  overflow: hidden;
}

.sidebar-particle-canvas {
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.header-particle-canvas {
  width: 100%;
  height: 100%;
}

.sidebar-title {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 16px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-lg) 0;
  display: flex;
  flex-direction: column;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 140, 0, 0.05);
  color: var(--color-primary);
}

.nav-item.active {
  background: rgba(255, 140, 0, 0.1);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.nav-icon {
  font-size: 18px;
}

.nav-label {
  flex: 1;
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.user-mini {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #ff6b35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 18px;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role-mini {
  font-size: 11px;
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-logout-mini {
  width: 100%;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-logout-mini:hover {
  background: rgba(255, 140, 0, 0.05);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ========== MAIN CONTAINER ========== */
.main-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.app-background-particles {
  position: fixed;
  top: 260px;
  left: 260px;
  right: 0;
  bottom: 0;
  width: calc(100% - 260px);
  height: calc(100vh - 260px);
  z-index: 2;
  pointer-events: none;
  display: block;
}

/* ========== TOPBAR ========== */
.topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 100;
  flex-shrink: 0;
}

.topbar-left h2 {
  font-size: 24px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.topbar-left p {
  font-size: 13px;
  color: var(--color-text-tertiary);
}

.topbar-right {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.topbar-controls {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.search-input {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  width: 200px;
  transition: all 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.btn-refresh {
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}

.btn-refresh:hover {
  background: rgba(255, 140, 0, 0.05);
  border-color: var(--color-primary);
}

.user-profile-top {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  padding: 0 var(--spacing-md);
  border-left: 1px solid var(--color-border);
}

.avatar-small {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #ff6b35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
}

#name-top {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
}

/* ========== CONTENT AREA ========== */
.content-area {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xl);
  position: relative;
  z-index: 50;
  background: transparent;
}

.section {
  display: none;
}

.section.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ========== KPI ROW ========== */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.kpi-label {
  font-size: 12px;
  color: var(--color-text-tertiary);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.5px;
}

.kpi-value {
  font-size: 40px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.kpi-trend {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ========== DASHBOARD GRID ========== */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: var(--spacing-lg);
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-lg);
}

/* ========== CARD ========== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.filter-select {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  background: var(--color-surface);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-select:hover {
  border-color: var(--color-primary);
}

/* ========== TABLES ========== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table thead {
  background: rgba(255, 140, 0, 0.05);
}

.data-table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.data-table tbody tr {
  transition: background-color 0.2s;
}

.data-table tbody tr:hover {
  background-color: rgba(255, 140, 0, 0.03);
  cursor: pointer;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.empty-state {
  text-align: center;
  color: var(--color-text-tertiary);
  padding: var(--spacing-2xl) var(--spacing-lg) !important;
}

/* ========== STATUS BADGES ========== */
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-open {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.badge-in_progress {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.badge-resolved {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
}

.badge-closed {
  background: rgba(107, 114, 128, 0.1);
  color: #4b5563;
}

.badge-high {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.badge-medium {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.badge-low {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
}

/* ========== ANALYTICS ========== */
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: var(--spacing-lg);
}

.card-full {
  grid-column: 1 / -1;
}

.chart-container {
  padding: var(--spacing-lg);
  min-height: 300px;
  position: relative;
}

.metrics-table {
  overflow-x: auto;
}

/* ========== MODAL ========== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all 0.2s;
}

.modal-close:hover {
  color: var(--color-primary);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.info-item {
  display: flex;
  flex-direction: column;
}

.info-item label {
  font-size: 11px;
  color: var(--color-text-tertiary);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 4px;
  letter-spacing: 0.3px;
}

.info-item span {
  font-size: 14px;
  color: var(--color-text);
  font-weight: 500;
}

.modal-description {
  margin-bottom: var(--spacing-lg);
}

.modal-description h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.modal-description p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.modal-actions {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.modal-actions label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.action-controls {
  display: flex;
  gap: var(--spacing-md);
}

.status-select {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s;
}

.status-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.btn-primary {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--color-primary), #ff6b35);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 140, 0, 0.2);
}

.btn-secondary {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

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

/* ========== CANVAS ========== */
canvas {
  display: block;
  image-rendering: crisp-edges;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .sidebar {
    width: 220px;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .app {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    flex-direction: row;
  }

  .sidebar-nav {
    flex-direction: row;
    padding: 0;
  }

  .nav-item {
    flex: 1;
    justify-content: center;
    padding: var(--spacing-md);
    border-left: none;
    border-bottom: 3px solid transparent;
  }

  .nav-item.active {
    border-left: none;
    border-bottom-color: var(--color-primary);
  }

  .sidebar-footer {
    display: none;
  }

  .topbar {
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: flex-start;
  }

  .topbar-right {
    width: 100%;
  }

  .topbar-controls {
    width: 100%;
    flex-wrap: wrap;
  }

  .search-input {
    width: 100%;
  }

  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .data-table {
    font-size: 12px;
  }

  .data-table th,
  .data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .modal-info-grid {
    grid-template-columns: 1fr;
  }
}