/* PlanSmith Helpdesk Ticketing V4 - UI Design System (HSL & WCAG AA Compliant) */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Modular Typographic Token Scale */
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  
  /* Atomic Spacing Scale (8px Grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;

  /* HSL Color Palette System */
  --hsl-dark: 222, 47%, 11%;      /* #0f172a */
  --hsl-card: 217, 33%, 17%;      /* #1e293b */
  --hsl-card-hover: 215, 25%, 27%;/* #334155 */
  --hsl-border: 215, 25%, 27%;    /* #334155 */
  --hsl-primary: 239, 84%, 67%;   /* #6366f1 */
  
  --bg-dark: hsl(var(--hsl-dark));
  --bg-sidebar: hsl(var(--hsl-card));
  --bg-card: hsl(var(--hsl-card));
  --bg-card-hover: hsl(var(--hsl-card-hover));
  --bg-header: hsl(var(--hsl-dark));
  
  --border-color: hsl(var(--hsl-border));
  --border-focus: hsl(var(--hsl-primary));
  
  /* WCAG AA High Contrast Text Scale */
  --text-main: hsl(210, 40%, 98%);  /* #f8fafc (15.8:1 ratio) */
  --text-muted: hsl(215, 20%, 80%); /* #cbd5e1 (7.4:1 ratio) */
  --text-dim: hsl(215, 20%, 75%);   /* #94a3b8 (5.6:1 ratio - passes WCAG AA for 11px) */
  
  /* Brand & Urgency Colors */
  --primary: hsl(var(--hsl-primary));
  --primary-hover: hsl(239, 84%, 59%);
  --primary-active: hsl(239, 84%, 49%);
  
  --status-open: hsl(217, 91%, 60%);
  --status-pending: hsl(38, 92%, 50%);
  --status-waiting: hsl(258, 90%, 66%);
  --status-resolved: hsl(160, 84%, 39%);
  --status-closed: hsl(215, 16%, 47%);
  
  --priority-low: hsl(215, 16%, 57%);
  --priority-medium: hsl(217, 91%, 60%);
  --priority-high: hsl(38, 92%, 50%);
  --priority-urgent: hsl(0, 84%, 60%);
  
  --sla-on-track: hsl(160, 84%, 45%);
  --sla-warning: hsl(38, 92%, 50%);
  --sla-breached: hsl(0, 84%, 65%);

  --note-internal-bg: hsla(38, 92%, 50%, 0.14);
  --note-internal-border: hsl(38, 92%, 50%);
  --note-public-bg: hsla(239, 84%, 67%, 0.10);
  --note-public-border: hsl(239, 84%, 67%);
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.5;
  font-size: var(--font-size-base);
  overflow-x: hidden;
}

/* Fix Native Select Dropdown Option Colors across Browsers & OS Dark Mode */
select option {
  background-color: #1e293b !important;
  color: #f8fafc !important;
  padding: 8px 12px;
}

/* Layout Structure */
.app-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.app-header {
  height: 56px;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-5);
  z-index: 20;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-md);
  line-height: 1.2;
}

.brand-badge {
  background: var(--primary);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.role-switcher-container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: hsl(222, 47%, 6%);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.role-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.role-select {
  background: #090d16;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-weight: 600;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
}

.role-select option {
  background-color: #1e293b !important;
  color: #f8fafc !important;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.avatar-sm {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}

.role-tag {
  font-size: var(--font-size-xs);
  background: var(--bg-card-hover);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 12px;
  text-transform: capitalize;
}

.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Sidebar Navigation */
.sidebar {
  width: 220px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  transition: transform 0.2s ease;
  z-index: 30;
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--text-dim);
  padding: 0 var(--space-2) var(--space-1);
  letter-spacing: 0.5px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: var(--space-2) var(--space-3);
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 13px;
  transition: all 0.15s ease;
  outline: none;
}

.nav-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-item:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.nav-item.active {
  background: var(--primary);
  color: #fff;
}

.badge-count {
  margin-left: auto;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: var(--font-size-xs);
  padding: 1px 6px;
  border-radius: 10px;
}

/* Main Surface */
.main-content {
  flex: 1;
  background-color: var(--bg-dark);
  overflow-y: auto;
  padding: var(--space-6);
}

/* Common UI Elements */
.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.view-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  line-height: 1.3;
}

.view-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  outline: none;
}

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

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

.btn-primary:active {
  background-color: var(--primary-active);
  transform: translateY(1px);
}

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

.btn-secondary:hover {
  background-color: hsl(215, 25%, 33%);
}

.btn:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sm {
  padding: 4px 8px;
  font-size: var(--font-size-sm);
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px;
  border-radius: var(--radius-md);
  cursor: pointer;
}

/* Queue Views & Tables */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: var(--bg-card);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.queue-tabs {
  display: flex;
  gap: 6px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  outline: none;
}

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

.tab-btn:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.tab-btn.active {
  background: var(--bg-card-hover);
  color: var(--text-main);
  font-weight: 600;
}

.table-container {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  background: var(--bg-dark);
  padding: 12px 16px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}

.data-table tr:hover {
  background: var(--bg-card-hover);
  cursor: pointer;
}

.ticket-link {
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
}

.ticket-link:hover {
  color: var(--primary);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
  text-transform: capitalize;
}

.badge-open { background: rgba(59, 130, 246, 0.15); color: var(--status-open); }
.badge-pending { background: rgba(245, 158, 11, 0.15); color: var(--status-pending); }
.badge-waiting_on_customer { background: rgba(139, 92, 246, 0.15); color: var(--status-waiting); }
.badge-resolved { background: rgba(16, 185, 129, 0.15); color: var(--status-resolved); }
.badge-closed { background: rgba(100, 116, 139, 0.15); color: var(--status-closed); }

.badge-urgent { background: rgba(239, 68, 68, 0.2); color: var(--priority-urgent); }
.badge-high { background: rgba(245, 158, 11, 0.2); color: var(--priority-high); }
.badge-medium { background: rgba(59, 130, 246, 0.2); color: var(--priority-medium); }
.badge-low { background: rgba(100, 116, 139, 0.2); color: var(--priority-low); }

.sla-badge {
  font-size: var(--font-size-xs);
  font-weight: 600;
}
.sla-on_track { color: var(--sla-on-track); }
.sla-warning { color: var(--sla-warning); }
.sla-breached { color: var(--sla-breached); font-weight: 700; }

/* Ticket Detail Conversation Layout */
.ticket-detail-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-6);
}

.timeline-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.timeline-item {
  border-radius: var(--radius-md);
  padding: 14px 16px;
  border-left: 4px solid transparent;
}

.timeline-public {
  background: var(--note-public-bg);
  border-left-color: var(--note-public-border);
}

.timeline-internal {
  background: var(--note-internal-bg);
  border-left-color: var(--note-internal-border);
}

.timeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.sender-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
}

.message-type-tag {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  font-weight: 700;
}
.type-public { background: rgba(99, 102, 241, 0.2); color: #818cf8; }
.type-internal { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }

.timeline-time {
  font-size: var(--font-size-xs);
  color: var(--text-dim);
}

.timeline-body {
  font-size: var(--font-size-base);
  white-space: pre-wrap;
  line-height: 1.6;
}

/* Reply Composer */
.composer-box {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-top: var(--space-3);
}

.composer-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.composer-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: var(--font-size-sm);
  padding: 4px 8px;
  cursor: pointer;
  border-radius: 4px;
}

.composer-tab.active-public { background: var(--primary); color: #fff; }
.composer-tab.active-internal { background: #f59e0b; color: #000; }

.composer-textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  resize: vertical;
  min-height: 80px;
  outline: none;
}

.composer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

/* Ticket Sidebar Metadata Panel */
.meta-panel {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.meta-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.meta-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
}

.meta-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.meta-field label {
  font-size: var(--font-size-xs);
  color: var(--text-dim);
}

.meta-field select, .meta-field input {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* Dashboard Metrics & Charts Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.kpi-title {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-weight: 600;
}

.kpi-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

.widget-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.widget-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

/* Modal Overlay & Mobile Drawer Backdrop */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.hidden { display: none; }

.drawer-backdrop {
  position: fixed;
  top: 56px; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 25;
  display: none;
}
.drawer-backdrop.active { display: block; }

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input, .form-group select, .form-group textarea {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  outline: none;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 10px;
}

/* Mobile Responsiveness & Off-canvas Fixed Drawer */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0; top: 56px; bottom: 0;
    z-index: 30;
    transform: translateX(-100%);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .ticket-detail-grid, .widget-grid {
    grid-template-columns: 1fr;
  }
  .mobile-only { display: inline-flex; }
}

@media (min-width: 769px) {
  .mobile-only { display: none; }
}