:root {
  color-scheme: dark;
  --bg: #0c0f12;
  --panel: #12171b;
  --panel-deep: #0a0d0f;
  --line: #293239;
  --line-strong: #3a4851;
  --text: #e9eef0;
  --muted: #8d9ba3;
  --cyan: #4dd6c5;
  --cyan-dark: #173c39;
  --amber: #f3b34c;
  --red: #ff6b6b;
  --green: #63db8b;
  --blue: #75a7ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
}

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

button { letter-spacing: 0; }

.topbar {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: #101519;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
}

h1, h2, h3, p { margin-top: 0; }

h1 { margin-bottom: 0; font-size: 24px; font-weight: 650; }
h2 { display: inline; margin: 0; font-size: 16px; font-weight: 650; }
h3 { margin: 0; font-size: 12px; font-weight: 650; text-transform: uppercase; color: #b9c4c9; }

.upstream {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #b5c1c6;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}
.topnav { display: flex; gap: 14px; margin-left: auto; }
.topnav a { color: var(--cyan); text-decoration: none; font-size: 12px; }
.topnav a:hover { text-decoration: underline; }

.signal {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px rgba(99, 219, 139, 0.5);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(460px, 0.9fr) minmax(520px, 1.1fr);
  min-height: calc(100vh - 124px);
}

.request-pane, .response-pane {
  min-width: 0;
  padding: 24px 28px 30px;
}

.request-pane { border-right: 1px solid var(--line); background: var(--panel); }
.response-pane { background: var(--panel-deep); }

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 32px;
  margin-bottom: 20px;
}

.section-index {
  display: inline-block;
  width: 32px;
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.control-grid.triple { grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; }
.control-grid.preset-row { grid-template-columns: minmax(0, 1fr) auto; }
.control-grid.method-row { grid-template-columns: 120px minmax(0, 1fr); }
.wide { min-width: 0; }
.align-end { align-self: end; }

.field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.field > span, legend { color: #9ba9af; font-size: 11px; font-weight: 650; text-transform: uppercase; }

.label-row { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.inline-check { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 11px; font-weight: 400; text-transform: none; }
.inline-check input { accent-color: var(--cyan); }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  outline: none;
  background: #0d1114;
  color: var(--text);
}

input, select { height: 40px; padding: 0 11px; }
textarea { padding: 12px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--cyan); box-shadow: 0 0 0 2px rgba(77, 214, 197, 0.1); }

.identity-fields {
  position: relative;
  margin: 6px 0 16px;
  padding: 14px 14px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

legend { padding: 0 7px; }
.identity-fields .text-button { margin-top: 10px; }
.advanced-fields { margin: 2px 0 16px; border-bottom: 1px solid var(--line); }
.advanced-fields summary { padding: 9px 0; color: var(--muted); cursor: pointer; font-size: 11px; text-transform: uppercase; }
.advanced-fields .identity-fields { margin-top: 8px; }
.field-help { margin: 4px 0 8px; color: var(--muted); font-size: 11px; line-height: 1.5; }

.text-button, .copy-button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  font-size: 12px;
}

.token-input { display: grid; grid-template-columns: minmax(0, 1fr) 54px; margin-bottom: 17px; }
.token-input input { border-radius: 4px 0 0 4px; }
.icon-button { border: 1px solid var(--line-strong); border-left: 0; border-radius: 0 4px 4px 0; background: #171e22; color: #b8c4c9; cursor: pointer; font-size: 11px; }

.editor-tabs { display: flex; overflow-x: auto; border-bottom: 1px solid var(--line-strong); }
.editor-tab { min-height: 36px; padding: 0 14px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); cursor: pointer; white-space: nowrap; font-size: 12px; }
.editor-tab.active { border-bottom-color: var(--cyan); color: var(--text); }
.editor-panel { display: none; }
.editor-panel.active { display: block; }

.code-editor {
  min-height: 175px;
  margin-top: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.55;
  tab-size: 2;
}

.evidence-note {
  margin: 13px 0 0;
  padding-left: 11px;
  border-left: 2px solid var(--amber);
  color: #9da9ae;
  font-size: 12px;
  line-height: 1.65;
}

.form-error { margin-top: 12px; padding: 10px 12px; border: 1px solid #7c3434; border-radius: 4px; background: #2c1515; color: #ffb3b3; font-size: 12px; }

.actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.button { min-height: 36px; padding: 0 14px; border-radius: 4px; cursor: pointer; font-weight: 650; }
.button:disabled { opacity: 0.5; cursor: not-allowed; }
.button.primary { border: 1px solid var(--cyan); background: var(--cyan); color: #07110f; }
.button.secondary { border: 1px solid var(--line-strong); background: #172026; color: var(--text); }
.button.ghost { border: 1px solid transparent; background: transparent; color: var(--muted); }
.button.compact { min-height: 30px; padding: 0 10px; font-size: 11px; }
.button:hover:not(:disabled) { filter: brightness(1.12); }

.status-strip {
  display: grid;
  grid-template-columns: minmax(100px, 1fr) minmax(80px, 0.7fr) minmax(90px, 0.8fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px 0 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric-label { display: block; margin-bottom: 5px; color: var(--muted); font-size: 10px; text-transform: uppercase; }
.metric-value { display: block; overflow: hidden; text-overflow: ellipsis; color: #dfe6e9; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; white-space: nowrap; }
.metric-value.idle { color: var(--muted); }
.metric-value.pending { color: var(--amber); }
.metric-value.success { color: var(--green); }
.metric-value.error { color: var(--red); }

.output-section { margin-top: 22px; }
.output-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.output-tools { display: flex; gap: 14px; }
.output-block {
  min-height: 112px;
  max-height: 260px;
  overflow: auto;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #080b0d;
  color: #cfe1e5;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.output-block.response-body { min-height: 250px; max-height: 500px; }
.output-block.muted { color: #65727a; }

.offline-pane { border-top: 1px solid var(--line); padding: 28px clamp(18px, 4vw, 56px) 42px; }
.section-subtitle { margin: 7px 0 0 32px; color: var(--muted); font-size: 12px; }
.local-route { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin: 10px 0 12px; color: var(--muted); font-size: 11px; }
.local-route code { color: var(--cyan); }
.compact-status { min-height: 62px; max-height: 145px; }
.request-options { margin-top: 16px; align-items: end; }
.option-check { align-self: center; padding-bottom: 10px; }
.offline-tools { max-width: 760px; }
.offline-results { display: grid; gap: 8px; margin-top: 14px; max-width: 1100px; }
.book-search { max-width: 1240px; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); }
.book-search-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 14px; }
.book-search-heading h3 { margin-bottom: 6px; color: var(--text); font-size: 13px; text-transform: none; }
.book-search-heading .field-help { margin: 0; }
.book-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; }
.book-tab { min-height: 31px; padding: 0 11px; border: 1px solid var(--line-strong); border-radius: 3px; background: #11191c; color: var(--muted); cursor: pointer; font-size: 12px; }
.book-tab:hover { color: var(--text); border-color: var(--cyan-dark); }
.book-tab.active { border-color: var(--cyan); background: var(--cyan-dark); color: var(--cyan); }
.book-filter-grid { grid-template-columns: minmax(220px, 1.5fr) minmax(160px, 1fr) minmax(160px, 1fr) auto; max-width: 1100px; }
.book-browser { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr); gap: 16px; align-items: start; }
.book-results { display: grid; gap: 6px; margin-top: 14px; max-height: min(620px, calc(100vh - 300px)); overflow: auto; padding-right: 4px; }
.book-result-count { color: var(--muted); font-size: 11px; }
.book-result { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 9px 11px; border: 1px solid var(--line); background: #101619; }
.book-result.archived { border-color: #5b4930; background: #17140e; }
.book-result-main { display: grid; gap: 4px; min-width: 0; }
.book-result-main strong { color: var(--text); overflow-wrap: anywhere; }
.book-result-main span, .book-result-main small { color: var(--muted); }
.book-result-main small { font-size: 11px; }
.book-workspace { min-width: 0; margin-top: 14px; padding: 14px; border: 1px solid var(--line-strong); background: #0f1417; position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow: auto; }
.book-selected-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 13px; }
.book-selected-head > div { display: grid; gap: 4px; min-width: 0; }
.book-selected-head strong { color: var(--cyan); overflow-wrap: anywhere; }
.book-word-filter-grid { grid-template-columns: minmax(200px, .8fr) minmax(260px, 1.4fr) auto; }
.book-word-results { display: grid; gap: 6px; margin-top: 14px; max-height: calc(100vh - 260px); overflow: auto; padding-right: 3px; }
.book-word-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; }
.book-word-result { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-width: 0; padding: 8px 10px; border: 1px solid var(--line); background: #101619; }
.book-word-result > div { display: grid; gap: 4px; min-width: 0; }
.book-word-result strong { color: var(--text); }
.book-word-result span, .book-word-result small { color: var(--muted); overflow-wrap: anywhere; }
.book-word-result small { font-size: 10px; }
.offline-result { display: flex; justify-content: space-between; gap: 18px; border: 1px solid var(--line); padding: 12px 14px; background: #101619; }
.offline-result div { display: grid; gap: 4px; }
.offline-result span { color: var(--muted); }
.offline-result code { color: var(--cyan); overflow-wrap: anywhere; }
.offline-detail { display: grid; gap: 18px; max-width: 1100px; margin-top: 14px; }
.detail-head { display: flex; justify-content: space-between; gap: 20px; padding: 16px; border: 1px solid var(--line); background: #101619; }
.detail-head h3 { margin: 4px 0 8px; color: var(--text); font-size: 19px; text-transform: none; }
.detail-head p { margin: 5px 0; color: #d1dcdf; }
.detail-head .phonetics { color: var(--cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.audio-list { display: grid; gap: 8px; }
.audio-card { display: grid; gap: 8px; padding: 12px 14px; border: 1px solid var(--line); background: #101619; }
.audio-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.audio-meta code { color: var(--cyan); }
.source-badge { padding: 2px 7px; border-radius: 10px; font-size: 10px; text-transform: uppercase; }
.source-badge.local { color: #08130e; background: var(--green); }
.source-badge.cdn { color: #0b1020; background: var(--blue); }
.source-badge.unknown { color: #20170a; background: var(--amber); }
.audio-card audio { width: min(520px, 100%); height: 34px; }
.split-audio-summary { display: flex; gap: 18px; flex-wrap: wrap; margin: 8px 0 10px; }
.split-audio-summary > div { display: grid; gap: 3px; }
.split-audio-summary span { color: var(--muted); font-size: 11px; }
.split-audio-section { border: 1px solid var(--cyan-dark); padding: 14px; background: #0f1b1b; }
.split-audio-section h4 { color: var(--cyan); }
.split-audio-help { margin: 0 0 8px; color: #c7d5d6; font-size: 12px; line-height: 1.55; }
.split-audio-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 8px 0 10px; }
.split-audio-toolbar label { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }
.split-audio-toolbar select { min-height: 32px; }
.split-audio-toolbar .button { flex: 0 0 auto; }
.split-list .split-audio-play { margin-right: 8px; }
.phonics-list .phonics-audio-play { margin-right: 8px; }
.offline-detail > section > audio { width: min(520px, 100%); height: 34px; }
.audio-card details { color: var(--muted); font-size: 11px; }
.compact-output { min-height: 50px; max-height: 180px; margin-top: 8px; }
.sentence-list { display: grid; gap: 8px; padding-left: 28px; }
.sentence-list li { display: grid; gap: 8px; padding: 10px 12px; border: 1px solid var(--line); background: #101619; }
.sentence-line { color: #e6eef0; font-size: 14px; line-height: 1.65; }
.sentence-token { display: inline-block; padding: 1px 2px; border-radius: 3px; transition: color .08s, background-color .08s; }
.sentence-line .sentence-target { color: var(--cyan); font-weight: 750; background: rgba(77, 214, 197, 0.12); }
.sentence-line .sentence-token-active { color: #08130e; background: var(--green); }
.sentence-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px; }
.sentence-controls audio { width: min(430px, 100%); height: 32px; }
.sentence-list em { color: var(--muted); font-style: normal; }
.sentence-sync-note { color: var(--muted); font-size: 11px; }

.request-menu { border-top: 1px solid var(--line); }
.request-menu > summary { padding: 16px clamp(18px, 4vw, 56px); background: #101519; color: var(--cyan); cursor: pointer; font-size: 13px; font-weight: 700; list-style-position: inside; }
.request-menu[open] > summary { border-bottom: 1px solid var(--line); }
.offline-detail h4 { margin: 0 0 8px; color: #b9c4c9; font-size: 12px; text-transform: uppercase; }
.pronunciation-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.pronunciation-grid > div { display: grid; gap: 4px; padding: 10px 12px; border: 1px solid var(--line); background: #101619; }
.pronunciation-grid span { color: var(--muted); font-size: 11px; }
.pronunciation-grid strong { color: var(--cyan); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.split-list { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 10px 0 0; list-style: none; }
.split-list li { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border: 1px solid var(--line); background: #101619; }
.split-list li strong { color: var(--text); }
.split-list li span { color: var(--cyan); }
.split-list li em { color: var(--muted); font-size: 11px; font-style: normal; }
.phrase-list, .phonics-list { display: grid; gap: 6px; margin: 0; padding-left: 20px; }
.phrase-list li, .phonics-list li { display: flex; gap: 10px; flex-wrap: wrap; padding: 7px 9px; border-bottom: 1px solid var(--line); }
.phrase-list li span, .phonics-list li span { color: var(--muted); }
.story-text { margin: 0; white-space: pre-wrap; color: #cbd6d9; line-height: 1.7; }
.candidate-audio { margin-top: 10px; color: var(--muted); }
.candidate-list { display: grid; gap: 5px; margin: 8px 0 0; padding-left: 18px; }
.candidate-list li { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; }
.candidate-list code { color: var(--cyan); }

footer {
  padding: 10px 28px;
  border-top: 1px solid var(--line);
  background: #0a0d0f;
  color: #77858c;
  font-size: 11px;
  line-height: 1.5;
}

footer code { color: #9fb0b7; }

@media (max-width: 980px) {
  .workspace { grid-template-columns: 1fr; }
  .request-pane { border-right: 0; border-bottom: 1px solid var(--line); }
  .book-filter-grid, .book-word-filter-grid { grid-template-columns: 1fr 1fr; }
  .book-browser { grid-template-columns: 1fr; }
  .book-results, .book-word-results { max-height: none; overflow: visible; }
  .book-workspace { position: static; max-height: none; overflow: visible; }
}

@media (max-width: 620px) {
  .topbar { align-items: flex-start; flex-direction: column; gap: 12px; padding: 16px; }
  .topnav { margin-left: 0; }
  .request-pane, .response-pane { padding: 20px 16px; }
  .control-grid.triple { grid-template-columns: 1fr; }
  .book-search-heading, .book-selected-head { align-items: stretch; flex-direction: column; }
  .book-filter-grid, .book-word-filter-grid { grid-template-columns: 1fr; }
  .book-result { align-items: stretch; flex-direction: column; }
  .status-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .status-strip .button { grid-column: 1 / -1; }
  .label-row { align-items: flex-start; flex-direction: column; gap: 6px; }
  footer { padding: 10px 16px; }
}

@media (max-width: 420px) {
  .control-grid.preset-row { grid-template-columns: 1fr; }
  .control-grid.method-row { grid-template-columns: 100px minmax(0, 1fr); }
  .preset-row .button { width: 100%; }
  .actions { display: grid; grid-template-columns: 1fr 1fr; }
}