:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --ink: #17201d;
  --muted: #68736f;
  --line: #dbe0d9;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
  --warm: #b45309;
  --soft: #e8f2ef;
  --danger: #b42318;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  overflow: hidden;
}

.workspace {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  height: 100vh;
  overflow-y: auto;
}

.topbar,
.controls,
.panel,
.history-panel,
.settings {
  border: 1px solid var(--line);
  background: var(--panel);
}

.topbar {
  min-height: 96px;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-radius: 8px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 30px;
  line-height: 1.1;
}

h2 {
  margin-bottom: 0;
  font-size: 16px;
}

.status-pill {
  min-width: 84px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #f0f3ef;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}

.status-pill.active {
  background: var(--soft);
  color: var(--accent-dark);
}

.status-pill.error {
  background: #fff0ee;
  color: var(--danger);
}

.controls {
  padding: 12px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.primary-btn,
.icon-btn,
.ghost-btn {
  min-height: 42px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.primary-btn {
  gap: 9px;
  padding: 0 18px;
  color: #fff;
  background: var(--accent);
  font-weight: 800;
}

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

.icon-btn {
  width: 44px;
  background: #edf0ec;
  color: var(--ink);
  font-weight: 800;
}

.ghost-btn {
  padding: 0 13px;
  background: #edf0ec;
  color: var(--ink);
  font-weight: 700;
}

.toggle {
  min-height: 42px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.compact-field {
  display: grid;
  grid-template-columns: auto 150px;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.compact-field select {
  height: 42px;
}

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  min-height: 360px;
}

.panes.aligned-mode {
  grid-template-columns: 1fr 1fr;
}

.panel,
.history-panel {
  border-radius: 8px;
  min-width: 0;
}

.panel-head {
  min-height: 56px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-head span {
  color: var(--muted);
  font-size: 13px;
}

.live-text {
  height: 330px;
  padding: 18px;
  overflow: auto;
  font-size: 15px;
  line-height: 1.55;
  white-space: pre-wrap;
}

.translated {
  color: #0c3f39;
}

.align-list {
  display: flex;
  flex-direction: column;
}

.align-item {
  min-height: var(--pair-height, auto);
  padding: 0 0 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.align-item:last-child {
  border-bottom: 0;
}

.align-source,
.align-target {
  margin: 0;
  line-height: 1.5;
}

.align-source {
  color: var(--ink);
}

.align-target {
  color: #0c3f39;
  font-weight: 700;
}

.align-target.pending {
  color: var(--muted);
  font-weight: 500;
}

.muted {
  color: var(--muted);
}

.history-panel {
  flex: 1;
  min-height: 220px;
}

.history {
  max-height: 280px;
  overflow: auto;
  padding: 10px 16px 18px;
}

.history-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.history-item:last-child {
  border-bottom: 0;
}

.history-source,
.history-target {
  margin: 0;
  line-height: 1.5;
}

.history-source {
  color: var(--muted);
  font-size: 14px;
}

.history-target {
  margin-top: 4px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.settings {
  height: 100vh;
  padding: 24px 20px;
  border-width: 0 0 0 1px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow-y: auto;
  background: #fbfcfb;
}

.settings-header {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent-dark);
  margin-bottom: 5px;
}

.settings-header svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.settings-header h2 {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
}

.settings-group {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 16px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.settings-group:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  color: var(--accent-dark);
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  margin-bottom: 4px;
}

.group-title svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.settings label {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.settings label span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.slider-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.slider-field span {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-field output {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

input,
select {
  height: 40px;
  padding: 0 10px;
}

textarea {
  padding: 10px;
  resize: vertical;
}

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

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

input[type="range"] {
  padding: 0;
}

output {
  color: var(--muted);
  font-size: 13px;
}

.hint {
  margin: auto 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
  }

  .workspace {
    height: auto;
    overflow: visible;
  }

  .settings {
    height: auto;
    min-height: auto;
    border-width: 1px 0 0;
    overflow: visible;
  }
}

@media (max-width: 720px) {
  .workspace {
    padding: 14px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .panes,
  .two-col {
    grid-template-columns: 1fr;
  }

  .live-text {
    height: 260px;
    font-size: 15px;
  }
}