:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --panel-soft: #f9fafb;
  --border: #d9e1e8;
  --border-strong: #b8c5d1;
  --text: #17212b;
  --muted: #617083;
  --faint: #8b99a8;
  --primary: #0f766e;
  --primary-strong: #0b5f59;
  --primary-soft: #dff4f0;
  --accent: #d97706;
  --accent-soft: #fff0d6;
  --danger: #c2413b;
  --danger-soft: #ffe7e4;
  --blue: #2563a9;
  --blue-soft: #e5eefb;
  --shadow: 0 12px 28px rgba(22, 34, 51, 0.08);
  --radius: 8px;
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.08), transparent 260px),
    var(--bg);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  white-space: nowrap;
}

.app-shell {
  min-height: 100vh;
  padding: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1680px;
  margin: 0 auto 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 10px 22px rgba(15, 118, 110, 0.22);
}

.brand h1,
.brand p,
.settings-header h2,
.settings-header p,
.panel-header h2,
.panel-header p,
.preview-header h2,
.preview-header p {
  margin: 0;
}

.brand h1 {
  font-size: 20px;
  line-height: 1.2;
}

.brand p,
.settings-header p,
.panel-header p,
.preview-header p {
  color: var(--muted);
  font-size: 13px;
}

.top-actions,
.panel-actions,
.settings-buttons,
.filter-row,
.token-row,
.pager,
.mail-toolbar,
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.button,
.icon-button,
.tab {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  transition:
    background 0.16s ease,
    border-color 0.16s ease,
    color 0.16s ease,
    transform 0.16s ease;
}

.button {
  height: 36px;
  padding: 0 13px;
  font-weight: 700;
  font-size: 13px;
}

.button:hover,
.icon-button:hover,
.tab:hover {
  border-color: var(--border-strong);
}

.button:active,
.tab:active {
  transform: translateY(1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

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

.button.primary:hover {
  background: var(--primary-strong);
}

.button.secondary {
  background: var(--panel-soft);
}

.button.ghost {
  background: transparent;
}

.button.accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.icon-button {
  width: 32px;
  height: 32px;
  font-size: 22px;
  line-height: 1;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  border: 1px solid var(--border);
}

.status-pill.muted {
  color: var(--muted);
  background: var(--panel-soft);
}

.status-pill.ok {
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-color: rgba(15, 118, 110, 0.22);
}

.status-pill.warn {
  color: #925400;
  background: var(--accent-soft);
  border-color: rgba(217, 119, 6, 0.22);
}

.status-pill.danger {
  color: var(--danger);
  background: var(--danger-soft);
  border-color: rgba(194, 65, 59, 0.22);
}

.settings-panel {
  max-width: 1680px;
  margin: 0 auto 14px;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.settings-panel.collapsed {
  display: none;
}

.settings-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.settings-header h2 {
  font-size: 16px;
  margin-bottom: 3px;
}

.settings-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.1fr) minmax(240px, 1.5fr) minmax(220px, 1fr) 120px 126px auto;
  gap: 10px;
  align-items: end;
}

.field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.field span,
.section-title {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.field input,
.field select,
.search-input,
.token-row input,
.filter-row select {
  width: 100%;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  padding: 0 11px;
  outline: none;
}

.field input:focus,
.field select:focus,
.search-input:focus,
.token-row input:focus,
.filter-row select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(290px, 340px) minmax(360px, 0.92fr) minmax(460px, 1.25fr);
  gap: 14px;
  max-width: 1680px;
  margin: 0 auto;
  min-height: calc(100vh - 126px);
}

.panel {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 0;
}

.sidebar,
.mail-list-panel,
.preview-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar {
  padding: 14px;
  gap: 14px;
}

.account-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.metric {
  padding: 12px;
  border-radius: 8px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 7px;
}

.metric strong {
  font-size: 18px;
  line-height: 1;
}

.manual-token,
.filter-block,
.tag-panel {
  display: grid;
  gap: 8px;
}

.tag-panel {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-soft);
}

.tag-summary {
  min-height: 20px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tag-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.token-row input {
  min-width: 0;
}

.tag-row input,
.tag-row select {
  width: 100%;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  padding: 0 10px;
  outline: none;
  min-width: 0;
}

.tag-row input:focus,
.tag-row select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.full-width {
  width: 100%;
}

.filter-row select {
  min-width: 0;
}

.purchase-list {
  display: grid;
  gap: 8px;
  overflow: auto;
  padding-right: 2px;
  min-height: 240px;
}

.purchase-card {
  display: grid;
  gap: 7px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

.purchase-card:hover {
  border-color: var(--primary);
}

.purchase-card.active {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.purchase-top,
.mail-card-top,
.purchase-meta,
.mail-meta-line {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.purchase-address,
.mail-subject {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 800;
}

.purchase-address {
  color: var(--text);
  font-size: 14px;
}

.purchase-meta,
.mail-meta-line {
  color: var(--muted);
  font-size: 12px;
}

.token-chip,
.code-chip,
.tag-chip {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  min-height: 22px;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.token-chip {
  color: var(--blue);
  background: var(--blue-soft);
}

.code-chip {
  color: #8f3d00;
  background: var(--accent-soft);
}

.tag-chip {
  color: var(--primary-strong);
  background: var(--primary-soft);
}

.pager {
  justify-content: space-between;
  padding-top: 2px;
}

.pager span,
.last-updated {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.panel-header,
.preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.panel-header h2,
.preview-header h2 {
  font-size: 17px;
  margin-bottom: 4px;
}

.mail-toolbar {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.mail-toolbar .search-input {
  flex: 1;
  min-width: 120px;
}

.checkbox-row {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.mail-list {
  overflow: auto;
  padding: 12px;
  display: grid;
  align-content: start;
  gap: 8px;
  flex: 1;
}

.mail-card {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

.mail-card:hover {
  border-color: var(--blue);
}

.mail-card.active {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.mail-subject {
  flex: 1;
  font-size: 14px;
}

.mail-from {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-state,
.empty-preview {
  min-height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--muted);
}

.empty-state strong,
.empty-preview strong {
  display: block;
  color: var(--text);
  margin-bottom: 6px;
}

.empty-state p,
.empty-preview p {
  margin: 0;
  font-size: 13px;
}

.preview-header {
  align-items: center;
}

.preview-header > div {
  min-width: 0;
}

.preview-header h2 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 8px;
}

.code-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 14px 16px 0;
  padding: 14px 16px;
  border: 1px solid rgba(217, 119, 6, 0.28);
  border-radius: 8px;
  background: linear-gradient(90deg, var(--accent-soft), #fff);
}

.code-banner span {
  color: #8f5200;
  font-weight: 800;
  font-size: 13px;
}

.code-banner strong {
  color: #7c2d12;
  font-size: 28px;
  letter-spacing: 0;
  font-family: "SF Mono", Consolas, monospace;
}

.preview-tabs {
  display: flex;
  gap: 6px;
  padding: 14px 16px 0;
}

.tab {
  height: 32px;
  padding: 0 11px;
  color: var(--muted);
  font-weight: 800;
  font-size: 12px;
}

.tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.preview-body {
  flex: 1;
  margin: 12px 16px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  overflow: auto;
  min-height: 420px;
}

.mail-frame {
  width: 100%;
  min-height: 560px;
  border: 0;
  background: #fff;
}

.text-preview {
  padding: 14px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 12px;
  line-height: 1.6;
  color: #213042;
}

.hidden {
  display: none !important;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(420px, calc(100vw - 36px));
  padding: 12px 14px;
  border-radius: 8px;
  background: #17212b;
  color: #fff;
  font-size: 13px;
  box-shadow: 0 14px 36px rgba(23, 33, 43, 0.26);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity 0.18s ease,
    transform 0.18s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1260px) {
  .settings-grid {
    grid-template-columns: 1fr 1fr;
  }

  .workspace {
    grid-template-columns: 320px 1fr;
  }

  .preview-panel {
    grid-column: 1 / -1;
    min-height: 620px;
  }
}

@media (max-width: 820px) {
  .app-shell {
    padding: 10px;
  }

  .topbar,
  .workspace,
  .settings-grid,
  .panel-header,
  .preview-header {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .topbar {
    align-items: stretch;
  }

  .top-actions,
  .panel-actions,
  .settings-buttons {
    width: 100%;
    justify-content: stretch;
  }

  .top-actions .button,
  .panel-actions .button,
  .settings-buttons .button {
    flex: 1;
  }

  .workspace {
    display: flex;
    flex-direction: column;
  }

  .mail-toolbar {
    flex-wrap: wrap;
  }

  .preview-body {
    min-height: 360px;
  }
}