:root {
  color-scheme: light dark;
  --surface: #f7f9f7;
  --surface-panel: #ffffff;
  --surface-soft: #eef5ef;
  --ink: #1c1b1f;
  --muted: #67645f;
  --line: #dedbd4;
  --primary: #2f6f4e;
  --primary-strong: #174e35;
  --accent: #a23d3d;
  --list-bg: #edf2ef;
  --bar-bg: rgba(247, 249, 247, 0.92);
  --status-bg: #fff5f4;
  --status-border: #e5b4b1;
  --status-color: #822626;
}

.mdui-theme-dark {
  --surface: #1a1c1a;
  --surface-panel: #222422;
  --surface-soft: #2a3a2e;
  --ink: #e2e3df;
  --muted: #9e9b96;
  --line: #3a3a38;
  --primary: #6fcf97;
  --primary-strong: #a8e6c3;
  --accent: #e57373;
  --list-bg: #1e211e;
  --bar-bg: rgba(26, 28, 26, 0.92);
  --status-bg: #3a2020;
  --status-border: #6b3030;
  --status-color: #f5a0a0;
}

@media (prefers-color-scheme: dark) {
  .mdui-theme-auto {
    --surface: #1a1c1a;
    --surface-panel: #222422;
    --surface-soft: #2a3a2e;
    --ink: #e2e3df;
    --muted: #9e9b96;
    --line: #3a3a38;
    --primary: #6fcf97;
    --primary-strong: #a8e6c3;
    --accent: #e57373;
    --list-bg: #1e211e;
    --bar-bg: rgba(26, 28, 26, 0.92);
    --status-bg: #3a2020;
    --status-border: #6b3030;
    --status-color: #f5a0a0;
  }
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--surface);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--muted);
}

[hidden] {
  display: none !important;
}

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

mdui-top-app-bar {
  background: var(--bar-bg);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

mdui-navigation-drawer {
  --shape-corner-large: 0px;
  border-right: 1px solid var(--line);
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px 20px 16px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 8px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 750;
}

.brand-block h1,
.brand-block p,
.pane-header h2,
.pane-header p,
.empty-state h2,
.empty-state p,
.compose-header h2,
.message-view h2 {
  margin: 0;
}

.brand-block h1 {
  font-size: 1rem;
}

.mailbox-panel {
  display: grid;
  gap: 10px;
  padding: 0 16px 18px;
}

.mailbox-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.brand-block p,
.pane-header p,
.empty-state p {
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 390px) minmax(0, 1fr);
  min-height: calc(100vh - 64px);
}

.mail-list-pane {
  border-right: 1px solid var(--line);
  background: var(--list-bg);
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 20px 14px;
}

.pane-header h2,
.empty-state h2,
.compose-header h2,
.message-view h2 {
  font-size: 1.28rem;
  font-weight: 700;
}

.status-bar {
  margin: 0 20px 14px;
  padding: 10px 12px;
  border: 1px solid var(--status-border);
  border-radius: 8px;
  background: var(--status-bg);
  color: var(--status-color);
  font-size: 0.9rem;
}

.mail-list {
  display: grid;
  gap: 8px;
  padding: 0 12px 24px;
}

.mail-item {
  box-sizing: border-box;
  width: 100%;
  min-height: 96px;
  padding: 14px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.mail-item:hover {
  background: rgba(47, 111, 78, 0.08);
}

.mail-item.active {
  border-color: rgba(47, 111, 78, 0.4);
  background: var(--surface-soft);
}

.mail-item.unread .mail-from,
.mail-item.unread .mail-subject {
  color: var(--primary-strong);
}

.mail-item.unread .mail-subject::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 999px;
  background: var(--accent);
  vertical-align: middle;
}

.mail-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

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

.mail-from {
  font-weight: 700;
}

.mail-date {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.78rem;
}

.mail-subject {
  margin-top: 8px;
  font-size: 0.96rem;
}

.mail-snippet {
  display: -webkit-box;
  margin-top: 6px;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.88rem;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.load-more-wrap {
  padding: 8px 12px 24px;
}

.reader-pane {
  min-width: 0;
  background: var(--surface-panel);
}

.empty-state {
  display: grid;
  min-height: calc(100vh - 64px);
  place-content: center;
  gap: 10px;
  padding: 32px;
  text-align: center;
}

.empty-icon {
  color: var(--primary);
  font-family: "Material Icons";
  font-size: 48px;
  line-height: 1;
}

.message-view,
.compose-view {
  max-width: 900px;
  margin: 0 auto;
  padding: 34px clamp(20px, 5vw, 56px) 56px;
}

.message-toolbar,
.compose-header,
.compose-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.compose-header {
  justify-content: space-between;
  margin-bottom: 20px;
}

.message-meta {
  display: grid;
  gap: 12px;
  margin: 22px 0;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.message-meta div {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 12px;
}

.message-meta dt {
  color: var(--muted);
}

.message-meta dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
}

#message-body {
  margin: 0;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font: 0.98rem/1.7 ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

.compose-view {
  display: grid;
  gap: 14px;
}

.compose-actions {
  margin-top: 4px;
}

@media (max-width: 840px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .mail-list-pane {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .workspace.show-reader .mail-list-pane {
    display: none;
  }

  .workspace.show-reader .reader-pane {
    min-height: calc(100vh - 64px);
  }

  .workspace:not(.show-reader) .reader-pane {
    display: none;
  }
}

.mobile-only {
  display: none;
}

@media (max-width: 840px) {
  .mobile-only {
    display: inline-flex;
  }
}

@media (max-width: 520px) {
  .pane-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .message-meta div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}