/**
 * Help Email Tales — Complete Modern Styling
 * Premium design system with clean typography, dynamic states, and responsive layout.
 */

:root {
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Primary & Accent Colors */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  
  /* Status Colors */
  --success-50: #f0fdf4;
  --success-100: #dcfce7;
  --success-500: #22c55e;
  --success-600: #16a34a;
  --success-700: #15803d;

  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --warning-700: #b45309;

  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* Shadows & Elevation */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --shadow-inner: inset 0 2px 4px 0 rgba(15, 23, 42, 0.04);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--neutral-800);
  background-color: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ==========================================================================
   Customer Chat Shell Layout
   ========================================================================== */

.chatbot-shell {
  max-width: 900px;
  margin: 0 auto;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: #ffffff;
  box-shadow: 0 0 40px rgba(15, 23, 42, 0.07);
  position: relative;
  overflow: hidden;
}

.chat-header {
  background: #ffffff;
  border-bottom: 1px solid var(--neutral-200);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: #ffffff;
  display: grid;
  place-items: center;
  font-size: 20px;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.brand h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 700;
  color: var(--neutral-900);
  line-height: 1.2;
}

.brand p {
  margin: 2px 0 0;
  color: var(--neutral-500);
  font-size: 13px;
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==========================================================================
   Buttons & Form Controls
   ========================================================================== */

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

.outline-btn {
  background: #ffffff;
  border-color: var(--neutral-300);
  color: var(--neutral-700);
}

.outline-btn:hover {
  background: var(--neutral-100);
  border-color: var(--neutral-400);
}

.outline-btn:active {
  background: var(--neutral-200);
}

.primary-outline {
  border-color: var(--primary-200);
  color: var(--primary-600);
  background: var(--primary-50);
}

.primary-outline:hover {
  background: var(--primary-100);
  border-color: var(--primary-500);
  color: var(--primary-700);
}

.solid-btn {
  background: var(--primary-600);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.solid-btn:hover {
  background: var(--primary-700);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.solid-btn:disabled, .outline-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.ghost-btn {
  background: transparent;
  color: var(--neutral-500);
}

.ghost-btn:hover {
  background: var(--neutral-100);
  color: var(--neutral-800);
}

.text-input {
  width: 100%;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--neutral-900);
  background: #ffffff;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.text-input:focus {
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.text-input::placeholder {
  color: var(--neutral-400);
}

/* ==========================================================================
   Progress & Live Status
   ========================================================================== */

.progress-section {
  background: #ffffff;
  border-bottom: 1px solid var(--neutral-200);
  padding: 10px 20px;
}

.progress-section > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--neutral-600);
  font-size: 13px;
  font-weight: 500;
}

.progress-track {
  width: 140px;
  height: 6px;
  background: var(--neutral-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 20%;
  background: var(--primary-600);
  border-radius: var(--radius-full);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.live-status {
  padding: 10px 20px;
  border-bottom: 1px solid var(--neutral-200);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.live-status.pending {
  background: var(--warning-50);
  color: var(--warning-700);
  border-bottom-color: var(--warning-100);
}

.live-status.active {
  background: var(--success-50);
  color: var(--success-700);
  border-bottom-color: var(--success-100);
}

.live-status.resolved {
  background: var(--neutral-100);
  color: var(--neutral-600);
  border-bottom-color: var(--neutral-200);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.live-status.pending .status-dot {
  background: var(--warning-500);
  animation: pulse 1.6s infinite ease-in-out;
}

.live-status.active .status-dot {
  background: var(--success-500);
  animation: pulse 1.6s infinite ease-in-out;
}

.live-status.resolved .status-dot {
  background: var(--neutral-400);
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 0.4; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* ==========================================================================
   Message Thread Area
   ========================================================================== */

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: linear-gradient(180deg, #ffffff 0%, var(--neutral-50) 100%);
  scroll-behavior: smooth;
}

.message {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  line-height: 1.5;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.2s ease-out;
  word-break: break-word;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.bot {
  background: #ffffff;
  color: var(--neutral-800);
  border: 1px solid var(--neutral-200);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.message.user {
  background: var(--primary-600);
  color: #ffffff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.message.user small {
  color: rgba(255, 255, 255, 0.75);
}

.message.admin {
  background: var(--success-50);
  color: var(--neutral-800);
  border: 1px solid var(--success-100);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.message.system {
  align-self: stretch;
  max-width: 100%;
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  color: var(--primary-800);
  font-size: 13px;
  border-radius: var(--radius-md);
  box-shadow: none;
}

.message-sender-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  color: var(--success-700);
}

.message small {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  color: var(--neutral-500);
  text-align: right;
}

/* ==========================================================================
   Interactive Composer
   ========================================================================== */

.composer {
  background: #ffffff;
  border-top: 1px solid var(--neutral-200);
  padding: 16px 20px;
  box-shadow: 0 -4px 12px rgba(15, 23, 42, 0.03);
  z-index: 10;
}

.composer-row {
  display: flex;
  gap: 10px;
}

.composer-row .text-input {
  flex: 1;
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.choice {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--neutral-300);
  background: #ffffff;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  color: var(--neutral-800);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.choice:hover {
  border-color: var(--primary-500);
  background: var(--primary-50);
  color: var(--primary-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.resolved-bar {
  background: var(--neutral-100);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
}

.resolved-info strong {
  display: block;
  color: var(--neutral-800);
}

.resolved-info span {
  color: var(--neutral-500);
  font-size: 12px;
}

/* ==========================================================================
   Drawer & Modals
   ========================================================================== */

.history-panel {
  position: absolute;
  right: 16px;
  top: 72px;
  z-index: 50;
  width: min(380px, calc(100% - 32px));
  background: #ffffff;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-xl);
  animation: fadeIn 0.15s ease-out;
}

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

.panel-heading h2 {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  color: var(--neutral-900);
}

.panel-heading p {
  font-size: 12px;
  color: var(--neutral-500);
  margin: 2px 0 0;
}

.history-list {
  max-height: 360px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px;
  border: 1px solid var(--neutral-200);
  background: #ffffff;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
}

.history-item:hover {
  background: var(--primary-50);
  border-color: var(--primary-200);
}

.history-item.active-chat {
  border-color: var(--primary-600);
  background: var(--primary-50);
}

.history-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.history-item-header strong {
  font-size: 14px;
  color: var(--neutral-900);
}

.history-item-issue {
  font-size: 13px;
  color: var(--neutral-600);
  margin-bottom: 4px;
}

.history-item small {
  font-size: 11px;
  color: var(--neutral-400);
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.status-pending {
  background: var(--warning-100);
  color: var(--warning-700);
}

.status-active {
  background: var(--primary-100);
  color: var(--primary-700);
}

.status-resolved {
  background: var(--neutral-200);
  color: var(--neutral-600);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 20px;
  animation: fadeIn 0.15s ease-out;
}

.modal-card {
  background: #ffffff;
  width: min(460px, 100%);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-xl);
}

.modal-card h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--neutral-900);
}

.modal-card p {
  color: var(--neutral-600);
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

.empty-state {
  text-align: center;
  color: var(--neutral-500);
  padding: 24px 16px;
  font-size: 13px;
  background: var(--neutral-50);
  border-radius: var(--radius-md);
  margin: 0;
}

/* ==========================================================================
   Admin Support Dashboard
   ========================================================================== */

.admin-shell {
  height: 100vh;
  display: flex;
  background: var(--neutral-100);
  overflow: hidden;
}

.admin-sidebar {
  width: 420px;
  background: #ffffff;
  border-right: 1px solid var(--neutral-200);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.admin-sidebar-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--neutral-200);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.stat-card {
  padding: 10px 8px;
  text-align: center;
  border-radius: var(--radius-md);
  background: var(--neutral-50);
  border: 1px solid var(--neutral-200);
}

.stat-card strong {
  display: block;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.1;
}

.stat-card span {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--neutral-500);
  text-transform: uppercase;
  margin-top: 4px;
}

.stat-pending strong { color: var(--warning-600); }
.stat-active strong { color: var(--primary-600); }
.stat-resolved strong { color: var(--neutral-600); }

.filter-row {
  display: flex;
  gap: 6px;
}

.filter {
  flex: 1;
  padding: 6px 8px;
  font-size: 12px;
  background: var(--neutral-100);
  color: var(--neutral-600);
  border: 1px solid transparent;
}

.filter.active {
  background: var(--primary-600);
  color: #ffffff;
  font-weight: 700;
}

.session-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.session-card {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px;
  background: #ffffff;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: var(--shadow-xs);
}

.session-card:hover {
  border-color: var(--primary-300);
  background: var(--primary-50);
}

.session-card.selected {
  border-color: var(--primary-600);
  background: var(--primary-50);
  box-shadow: 0 0 0 2px var(--primary-600);
}

.session-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.session-email {
  font-size: 14px;
  font-weight: 700;
  color: var(--neutral-900);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-meta {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.provider-tag, .issue-tag {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--neutral-100);
  color: var(--neutral-700);
  font-weight: 600;
}

.session-preview {
  font-size: 13px;
  color: var(--neutral-600);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 6px;
}

.session-time {
  font-size: 11px;
  color: var(--neutral-400);
}

.admin-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #ffffff;
  height: 100%;
}

.admin-chat-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--neutral-200);
  background: #ffffff;
  box-shadow: var(--shadow-xs);
  z-index: 10;
}

.admin-chat-header-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.user-info h2 {
  font-size: 18px;
  font-weight: 800;
  margin: 0 0 6px;
  color: var(--neutral-900);
}

.contact-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.contact-pill {
  font-size: 12px;
  padding: 4px 8px;
  background: var(--neutral-100);
  border-radius: var(--radius-sm);
  color: var(--neutral-700);
  text-decoration: none;
  font-weight: 500;
}

.contact-pill:hover {
  background: var(--neutral-200);
  color: var(--neutral-900);
}

.header-status-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ticket-problem-box {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--neutral-50);
  border-left: 3px solid var(--primary-600);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.ticket-problem-box strong {
  display: block;
  color: var(--neutral-800);
  margin-bottom: 2px;
}

.ticket-problem-box p {
  margin: 0;
  color: var(--neutral-600);
}

.ticket-problem-box small {
  display: block;
  margin-top: 4px;
  color: var(--neutral-400);
  font-size: 11px;
}

.admin-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--neutral-50);
}

.admin-bubble {
  background: var(--primary-600) !important;
  color: #ffffff !important;
  align-self: flex-end !important;
}

.admin-bubble .message-sender-badge {
  color: rgba(255, 255, 255, 0.8) !important;
}

.customer-bubble {
  background: #ffffff !important;
  border: 1px solid var(--neutral-200) !important;
  align-self: flex-start !important;
}

.customer-bubble .message-sender-badge {
  color: var(--primary-700) !important;
}

.admin-composer {
  padding: 16px 24px;
  background: #ffffff;
  border-top: 1px solid var(--neutral-200);
}

.empty-admin {
  margin: auto;
  text-align: center;
  max-width: 360px;
  padding: 20px;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.empty-admin h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--neutral-800);
  margin: 0 0 8px;
}

.empty-admin p {
  color: var(--neutral-500);
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   Mobile Responsive Rules
   ========================================================================== */

@media (max-width: 768px) {
  .chatbot-shell {
    height: 100vh;
    border-radius: 0;
    max-width: 100%;
  }

  .chat-header {
    padding: 12px 16px;
  }

  .desktop-label {
    display: none;
  }

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

  .message {
    max-width: 90%;
  }

  .admin-shell {
    flex-direction: column;
  }

  .admin-sidebar {
    width: 100%;
    height: 40vh;
  }

  .admin-chat {
    height: 60vh;
  }
}