/* ═══════════════════════════════════════════════════════
   TestMailBox — Core Styles
   ═══════════════════════════════════════════════════════ */

/* === Theme Variables (defaults — overridden by theme CSS) === */
:root {
  --tmb-accent: #4f46e5;
  --tmb-accent-hover: #4338ca;
  --tmb-accent-light: rgba(79, 70, 229, 0.08);
  --tmb-bg: #f0f2f5;
  --tmb-panel-bg: #fff;
  --tmb-panel-border: #e5e7eb;
  --tmb-text-primary: #1f2937;
  --tmb-text-secondary: #6b7280;
  --tmb-text-muted: #9ca3af;
  --tmb-hover-bg: #f9fafb;
  --tmb-selected-bg: #eff6ff;
  --tmb-unread-dot: #3b82f6;
  --tmb-danger: #ef4444;
  --tmb-danger-hover: #dc2626;
  --tmb-success: #22c55e;
  --tmb-radius: 8px;
  --tmb-radius-sm: 6px;
  --tmb-transition: 0.15s ease;
}

/* === App Container === */
.tmb-app {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height) - 48px);
  min-height: 500px;
  background: var(--tmb-bg);
  border-radius: var(--tmb-radius);
  overflow: hidden;
  border: 1px solid var(--tmb-panel-border);
}

/* === Top Bar === */
.tmb-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--tmb-panel-bg);
  border-bottom: 1px solid var(--tmb-panel-border);
  flex-shrink: 0;
}
.tmb-topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.tmb-logo-icon {
  color: var(--tmb-accent);
}
.tmb-topbar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--tmb-text-primary);
  letter-spacing: -0.3px;
}
.tmb-topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.tmb-theme-select {
  padding: 5px 10px;
  border: 1px solid var(--tmb-panel-border);
  border-radius: var(--tmb-radius-sm);
  font-size: 13px;
  color: var(--tmb-text-primary);
  background: var(--tmb-panel-bg);
  cursor: pointer;
  outline: none;
}
.tmb-theme-select:focus {
  border-color: var(--tmb-accent);
  box-shadow: 0 0 0 2px var(--tmb-accent-light);
}

/* === Three-Column Layout === */
.tmb-layout {
  display: grid;
  grid-template-columns: 260px 320px 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* === Panel Common === */
.tmb-addresses,
.tmb-inbox,
.tmb-viewer {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--tmb-panel-bg);
}
.tmb-addresses {
  border-right: 1px solid var(--tmb-panel-border);
}
.tmb-inbox {
  border-right: 1px solid var(--tmb-panel-border);
}

.tmb-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--tmb-panel-border);
  flex-shrink: 0;
}
.tmb-panel-header h2 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--tmb-text-secondary);
}

/* === Addresses Panel === */
.tmb-addr-count {
  font-size: 12px;
  color: var(--tmb-text-muted);
  font-weight: 500;
}
.tmb-addr-create {
  padding: 12px 14px;
  border-bottom: 1px solid var(--tmb-panel-border);
  flex-shrink: 0;
}
.tmb-addr-input-row {
  display: flex;
  align-items: center;
  border: 1px solid var(--tmb-panel-border);
  border-radius: var(--tmb-radius-sm);
  overflow: hidden;
  background: var(--tmb-panel-bg);
  transition: border-color var(--tmb-transition);
}
.tmb-addr-input-row:focus-within {
  border-color: var(--tmb-accent);
  box-shadow: 0 0 0 2px var(--tmb-accent-light);
}
.tmb-addr-input {
  flex: 1;
  border: none;
  padding: 8px 10px;
  font-size: 13px;
  color: var(--tmb-text-primary);
  background: transparent;
  outline: none;
  min-width: 0;
}
.tmb-addr-input::placeholder {
  color: var(--tmb-text-muted);
}
.tmb-addr-domain {
  font-size: 11px;
  color: var(--tmb-text-muted);
  padding-right: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}
.tmb-addr-buttons {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}
.tmb-addr-error {
  font-size: 12px;
  color: var(--tmb-danger);
  margin-top: 6px;
  min-height: 0;
}
.tmb-addr-error:empty {
  display: none;
}

.tmb-addr-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px;
}
.tmb-addr-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--tmb-text-muted);
  text-align: center;
  padding: 24px;
  gap: 8px;
}
.tmb-addr-empty p {
  font-size: 13px;
}

/* Address Card */
.tmb-addr-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--tmb-radius-sm);
  cursor: pointer;
  transition: background var(--tmb-transition);
  position: relative;
}
.tmb-addr-card:hover {
  background: var(--tmb-hover-bg);
}
.tmb-addr-card.active {
  background: var(--tmb-selected-bg);
}
.tmb-addr-card-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--tmb-accent-light);
  color: var(--tmb-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
}
.tmb-addr-card-info {
  flex: 1;
  min-width: 0;
}
.tmb-addr-card-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--tmb-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tmb-addr-card-meta {
  font-size: 11px;
  color: var(--tmb-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.tmb-addr-card-badge {
  background: var(--tmb-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}
.tmb-addr-card-badge.empty {
  display: none;
}
.tmb-addr-card-copy {
  opacity: 0;
  padding: 4px;
  border: none;
  background: none;
  color: var(--tmb-text-muted);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--tmb-transition);
  flex-shrink: 0;
}
.tmb-addr-card:hover .tmb-addr-card-copy {
  opacity: 1;
}
.tmb-addr-card-copy:hover {
  color: var(--tmb-accent);
  background: var(--tmb-accent-light);
}
.tmb-addr-card-copy.copied {
  opacity: 1;
  color: var(--tmb-success);
}
.tmb-addr-card-delete {
  opacity: 0;
  padding: 4px;
  border: none;
  background: none;
  color: var(--tmb-text-muted);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--tmb-transition);
  flex-shrink: 0;
}
.tmb-addr-card:hover .tmb-addr-card-delete {
  opacity: 1;
}
.tmb-addr-card-delete:hover {
  color: var(--tmb-danger);
  background: rgba(239, 68, 68, 0.08);
}

/* === Inbox Panel === */
.tmb-inbox-status {
  display: flex;
  align-items: center;
  gap: 6px;
}
.tmb-poll-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--tmb-text-muted);
}
.tmb-poll-dot.active {
  background: var(--tmb-success);
  animation: tmb-pulse 2s infinite;
}
@keyframes tmb-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.tmb-poll-text {
  font-size: 11px;
  color: var(--tmb-text-muted);
}

/* === Folder Tabs === */
.tmb-folder-tabs {
  display: none;
  border-bottom: 1px solid var(--tmb-panel-border);
  overflow-x: auto;
  flex-shrink: 0;
  background: var(--tmb-panel-bg);
  scrollbar-width: none;
}
.tmb-folder-tabs::-webkit-scrollbar { display: none; }
.tmb-folder-tabs.visible {
  display: flex;
}
.tmb-folder-tab {
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--tmb-text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--tmb-transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tmb-folder-tab:hover {
  color: var(--tmb-text-primary);
  background: var(--tmb-hover-bg);
}
.tmb-folder-tab.active {
  color: var(--tmb-accent);
  border-bottom-color: var(--tmb-accent);
  font-weight: 600;
}
.tmb-folder-count {
  font-size: 11px;
  font-weight: 600;
  background: var(--tmb-accent-light);
  color: var(--tmb-accent);
  border-radius: 8px;
  padding: 0 6px;
  min-width: 16px;
  text-align: center;
  line-height: 18px;
}
.tmb-folder-count.empty {
  display: none;
}

.tmb-email-list {
  flex: 1;
  overflow-y: auto;
}
.tmb-inbox-empty,
.tmb-inbox-noaddr {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--tmb-text-muted);
  text-align: center;
  padding: 32px 24px;
  gap: 8px;
}
.tmb-inbox-empty-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--tmb-text-secondary);
}
.tmb-inbox-empty-sub {
  font-size: 12px;
}

/* Email Row */
.tmb-email-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  border-bottom: 1px solid var(--tmb-panel-border);
  transition: background var(--tmb-transition);
}
.tmb-email-row:hover {
  background: var(--tmb-hover-bg);
}
.tmb-email-row.active {
  background: var(--tmb-selected-bg);
}
.tmb-email-row.unread {
  background: rgba(59, 130, 246, 0.04);
}
.tmb-email-row.unread .tmb-email-sender {
  font-weight: 600;
  color: var(--tmb-text-primary);
}
.tmb-email-row.unread .tmb-email-subject {
  font-weight: 600;
  color: var(--tmb-text-primary);
}
.tmb-unread-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tmb-unread-dot);
  flex-shrink: 0;
  margin-top: 6px;
}
.tmb-unread-indicator.read {
  visibility: hidden;
}
.tmb-email-content {
  flex: 1;
  min-width: 0;
}
.tmb-email-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}
.tmb-email-sender {
  font-size: 13px;
  font-weight: 400;
  color: var(--tmb-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.tmb-email-time {
  font-size: 11px;
  color: var(--tmb-text-muted);
  flex-shrink: 0;
  margin-left: 8px;
}
.tmb-email-subject {
  font-size: 13px;
  color: var(--tmb-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 2px;
}
.tmb-email-preview {
  font-size: 12px;
  color: var(--tmb-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tmb-email-attachment-icon {
  color: var(--tmb-text-muted);
  flex-shrink: 0;
  margin-top: 4px;
}

/* === Viewer Panel === */
.tmb-viewer {
  background: var(--tmb-panel-bg);
}
.tmb-viewer-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--tmb-text-muted);
  text-align: center;
  gap: 12px;
  padding: 24px;
}
.tmb-viewer-placeholder p {
  font-size: 14px;
}
.tmb-viewer-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* Viewer Header */
.tmb-viewer-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--tmb-panel-border);
  flex-shrink: 0;
}
.tmb-viewer-subject {
  font-size: 18px;
  font-weight: 600;
  color: var(--tmb-text-primary);
  margin-bottom: 10px;
  line-height: 1.3;
}
.tmb-viewer-meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.tmb-viewer-meta > div {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}
.tmb-meta-label {
  color: var(--tmb-text-muted);
  font-weight: 500;
  min-width: 40px;
}
.tmb-meta-value {
  color: var(--tmb-text-primary);
}
.tmb-viewer-actions {
  position: absolute;
  top: 16px;
  right: 16px;
}
.tmb-viewer-header {
  position: relative;
}

/* Tabs */
.tmb-viewer-tabs {
  display: flex;
  padding: 0 20px;
  border-bottom: 1px solid var(--tmb-panel-border);
  flex-shrink: 0;
  background: var(--tmb-panel-bg);
}
.tmb-tab {
  padding: 8px 16px;
  border: none;
  background: none;
  font-size: 13px;
  font-weight: 500;
  color: var(--tmb-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--tmb-transition);
}
.tmb-tab:hover {
  color: var(--tmb-text-primary);
}
.tmb-tab.active {
  color: var(--tmb-accent);
  border-bottom-color: var(--tmb-accent);
}

/* Tab Panels */
.tmb-viewer-body {
  flex: 1;
  overflow: hidden;
  position: relative;
}
.tmb-tab-panel {
  display: none;
  position: absolute;
  inset: 0;
  overflow: auto;
}
.tmb-tab-panel.active {
  display: block;
}
.tmb-html-frame {
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
}
.tmb-text-body,
.tmb-source-body {
  margin: 0;
  padding: 16px 20px;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--tmb-text-primary);
}
.tmb-source-body {
  font-size: 11px;
  color: var(--tmb-text-secondary);
}

/* Attachments */
.tmb-viewer-attachments {
  border-top: 1px solid var(--tmb-panel-border);
  padding: 12px 20px;
  flex-shrink: 0;
}
.tmb-viewer-attachments h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--tmb-text-secondary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tmb-attachment-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tmb-attachment-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--tmb-hover-bg);
  border: 1px solid var(--tmb-panel-border);
  border-radius: var(--tmb-radius-sm);
  text-decoration: none;
  color: var(--tmb-text-primary);
  font-size: 12px;
  transition: all var(--tmb-transition);
  cursor: pointer;
}
.tmb-attachment-item:hover {
  background: var(--tmb-accent-light);
  border-color: var(--tmb-accent);
  color: var(--tmb-accent);
}
.tmb-attachment-icon {
  color: var(--tmb-text-muted);
  flex-shrink: 0;
}
.tmb-attachment-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 160px;
}
.tmb-attachment-size {
  color: var(--tmb-text-muted);
  font-size: 11px;
  flex-shrink: 0;
}

/* === Buttons === */
.tmb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 7px 14px;
  border: none;
  border-radius: var(--tmb-radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--tmb-transition);
  white-space: nowrap;
}
.tmb-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.tmb-btn-primary {
  background: var(--tmb-accent);
  color: #fff;
  flex: 1;
}
.tmb-btn-primary:hover:not(:disabled) {
  background: var(--tmb-accent-hover);
}
.tmb-btn-secondary {
  background: var(--tmb-hover-bg);
  color: var(--tmb-text-primary);
  border: 1px solid var(--tmb-panel-border);
}
.tmb-btn-secondary:hover:not(:disabled) {
  background: var(--tmb-accent-light);
  border-color: var(--tmb-accent);
  color: var(--tmb-accent);
}
.tmb-btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  background: none;
  border: 1px solid var(--tmb-panel-border);
  border-radius: var(--tmb-radius-sm);
  color: var(--tmb-text-secondary);
}
.tmb-btn-icon:hover {
  color: var(--tmb-danger);
  border-color: var(--tmb-danger);
  background: rgba(239, 68, 68, 0.06);
}

/* === Loading States === */
.tmb-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--tmb-text-muted);
}
.tmb-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--tmb-panel-border);
  border-top-color: var(--tmb-accent);
  border-radius: 50%;
  animation: tmb-spin 0.6s linear infinite;
}
@keyframes tmb-spin {
  to { transform: rotate(360deg); }
}

/* === Copy Toast === */
.tmb-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--tmb-text-primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--tmb-radius);
  font-size: 13px;
  font-weight: 500;
  z-index: 1000;
  transition: transform 0.3s ease;
  pointer-events: none;
}
.tmb-toast.show {
  transform: translateX(-50%) translateY(0);
}

/* === Mobile: Two-Panel / Stacked View === */
@media (max-width: 1024px) {
  .tmb-layout {
    grid-template-columns: 240px 1fr;
  }
  .tmb-viewer {
    display: none;
  }
  .tmb-viewer.mobile-visible {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 200;
    margin-top: var(--header-height);
  }
  .tmb-viewer.mobile-visible .tmb-viewer-header::before {
    content: '';
    display: block;
  }
  .tmb-mobile-back {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: none;
    border: none;
    border-bottom: 1px solid var(--tmb-panel-border);
    font-size: 13px;
    color: var(--tmb-accent);
    cursor: pointer;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .tmb-layout {
    grid-template-columns: 1fr;
  }
  .tmb-app {
    height: auto;
    min-height: calc(100vh - var(--header-height) - 48px);
  }
  .tmb-addresses {
    border-right: none;
    border-bottom: 1px solid var(--tmb-panel-border);
    max-height: none;
  }
  .tmb-inbox {
    border-right: none;
    min-height: 300px;
  }
  .tmb-addr-list {
    max-height: 200px;
  }
}

/* === Scrollbar Styling === */
.tmb-addr-list::-webkit-scrollbar,
.tmb-email-list::-webkit-scrollbar,
.tmb-tab-panel::-webkit-scrollbar {
  width: 6px;
}
.tmb-addr-list::-webkit-scrollbar-track,
.tmb-email-list::-webkit-scrollbar-track,
.tmb-tab-panel::-webkit-scrollbar-track {
  background: transparent;
}
.tmb-addr-list::-webkit-scrollbar-thumb,
.tmb-email-list::-webkit-scrollbar-thumb,
.tmb-tab-panel::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 3px;
}
.tmb-addr-list::-webkit-scrollbar-thumb:hover,
.tmb-email-list::-webkit-scrollbar-thumb:hover,
.tmb-tab-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.25);
}