:root {
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --paper: #f2f0ec;
  --panel: #fffdf8;
  --line: #d8d2c8;
  --accent: #2f3430;
  --accent-dark: #1f2421;
  --accent-soft: #ece8df;
  --shadow: rgba(31, 36, 33, 0.1);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

.topbar-logo {
  display: flex;
  align-items: baseline;
  gap: 1px;
  line-height: 1;
}
.logo-mo {
  font-family: 'Noto Serif SC', 'STSong', 'Songti SC', 'SimSun', serif;
  font-weight: 900;
  font-size: 22px;
  color: var(--ink);
}
.logo-flow {
  font-family: 'Dancing Script', cursive;
  font-weight: 600;
  font-size: 22px;
  color: #c9963c;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei UI", "Segoe UI", sans-serif;
}

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

.workspace {
  display: grid;
  grid-template-columns: minmax(360px, 0.95fr) minmax(360px, 1.05fr);
  gap: 18px;
  height: calc(100vh - 36px);
}

.editor-pane,
.preview-pane {
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  box-shadow: 0 18px 42px var(--shadow);
  overflow: hidden;
}

.editor-pane {
  display: flex;
  flex-direction: column;
}

.topbar,
.actionbar,
.preview-toolbar,
.answer-editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.actionbar {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  justify-content: space-between;
  flex-shrink: 0;
  margin-top: auto;
}

h1 {
  margin: 0;
  font-family: "Microsoft YaHei UI", "Segoe UI", sans-serif;
  font-size: 26px;
  font-weight: 760;
  line-height: 1.1;
  letter-spacing: 0;
}

p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.import-pane,
.controls-pane {
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--line);
  background: #fffdf8;
}

.import-pane {
  display: grid;
  gap: 12px;
  background: #fffdf8;
  flex-shrink: 0;
}

.controls-pane {
  display: grid;
  gap: 12px;
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
}

.controls-header,
.sample-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.controls-header > div {
  display: grid;
  gap: 3px;
}

.controls-header strong,
.sample-copy strong {
  font-size: 14px;
}

.controls-header span,
.sample-copy span {
  color: var(--muted);
  font-size: 12px;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(108px, 1fr));
  gap: 8px;
}

.preset-button {
  display: grid;
  align-items: start;
  justify-content: stretch;
  gap: 5px;
  min-height: 72px;
  padding: 10px;
  border-color: var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  text-align: left;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.preset-button strong {
  font-size: 13px;
}

.preset-button span {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.preset-button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px rgba(47, 52, 48, 0.12);
}

.simple-control-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 12px;
}

.simple-control-grid label {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.simple-control-grid span {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.simple-control-grid output {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.sample-preview {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.sample-stage {
  position: relative;
  min-height: 142px;
  overflow: hidden;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(30, 42, 51, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(30, 42, 51, 0.035) 1px, transparent 1px),
    #eee9df;
  background-size: 24px 24px;
}

#samplePreviewImage {
  display: none;
  width: min(100%, 520px);
  height: auto;
  max-height: 210px;
  object-fit: contain;
  box-shadow: 0 12px 24px rgba(31, 28, 23, 0.2);
  background: white;
}

#sampleEmptyState {
  color: var(--muted);
  font-size: 12px;
}

.advanced-settings {
  border-top: 1px solid var(--line);
  padding-top: 6px;
}

.advanced-settings summary {
  cursor: pointer;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  list-style-position: inside;
}

.advanced-settings summary span {
  margin-left: 8px;
  color: var(--muted);
  font-weight: 400;
}

.advanced-settings .control-grid {
  margin-top: 12px;
}

.import-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.import-hero > div {
  display: grid;
  gap: 3px;
}

.step-label {
  color: var(--muted);
  font-size: 12px;
}

.import-hero strong {
  font-size: 18px;
  letter-spacing: 0;
}

#importSummary {
  color: var(--muted);
  font-size: 12px;
}

.import-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.import-command-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.mode-compact {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
}

.mode-segment {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7f4ee;
}

.mode-button {
  min-height: 34px;
  padding: 0 14px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
}

.mode-button.active {
  background: var(--accent);
  color: #fffdf8;
  box-shadow: none;
}

.mode-hint {
  margin: -2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.experimental-import {
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.experimental-import summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
}

.answer-editor {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  border-bottom: 1px solid var(--line);
  background: #fffdf8;
}

.answer-editor-header,
.answer-editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 18px;
}

.answer-editor-header {
  border-bottom: 1px solid rgba(216, 210, 200, 0.72);
}

.answer-editor-header strong {
  font-size: 14px;
}

.answer-editor-header span,
.answer-editor-toolbar span {
  color: var(--muted);
  font-size: 12px;
}

.answer-editor-toolbar {
  border-top: 1px solid rgba(216, 210, 200, 0.72);
  background: #faf7f0;
}

.organized-preview {
  display: grid;
  gap: 8px;
  padding: 12px 18px 14px;
  border-top: 1px solid rgba(216, 210, 200, 0.72);
  background: #f4f0e8;
}

.organized-preview[hidden] {
  display: none;
}

.organized-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.organized-preview-header strong {
  font-size: 13px;
}

.organized-preview-header span {
  color: var(--muted);
  font-size: 12px;
}

.organized-preview-list {
  display: grid;
  gap: 6px;
  max-height: 168px;
  overflow: auto;
}

.preview-line {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 8px;
  align-items: baseline;
  min-height: 30px;
  padding: 6px 8px;
  border: 1px solid rgba(216, 210, 200, 0.78);
  border-radius: 8px;
  background: #fffdf8;
}

.preview-line b {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.preview-line span {
  min-width: 0;
  color: var(--ink);
  font: 13px/1.45 "Microsoft YaHei UI", sans-serif;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-line.formula span {
  font-family: Consolas, "Microsoft YaHei UI", monospace;
}

.upload-copy {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.upload-copy strong {
  font-size: 14px;
}

.upload-copy span,
#uploadStatus {
  color: var(--muted);
  font-size: 12px;
}

.upload-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.file-button {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: 600 14px/1 "Microsoft YaHei UI", sans-serif;
  cursor: pointer;
}

.secondary-file {
  border-color: var(--line);
  background: #fffdf8;
  color: var(--ink);
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.image-strip {
  display: none;
  grid-auto-flow: column;
  grid-auto-columns: 86px;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.image-strip.has-images {
  display: grid;
}

.image-strip figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 5px;
}

.image-strip img {
  display: block;
  width: 74px;
  height: 54px;
  object-fit: cover;
  background: #eee7dc;
}

.image-strip figcaption {
  margin-top: 4px;
  color: var(--muted);
  font-size: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 12px 14px;
}

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

.control-grid span,
.control-toggles label {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.control-grid output {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.control-toggles {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.control-toggles label {
  align-items: center;
  justify-content: flex-start;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

textarea {
  width: 100%;
  height: auto;
  min-height: 110px;
  max-height: 38vh;
  resize: none;
  border: 0;
  outline: 0;
  padding: 18px 22px;
  background: #ffffff;
  color: var(--ink);
  font: 17px/1.72 Consolas, "Microsoft YaHei UI", monospace;
  overflow-y: auto;
}

button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 15px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  text-decoration: none;
  font: 600 14px/1 "Microsoft YaHei UI", sans-serif;
  cursor: pointer;
}

.tool-button {
  min-height: 34px;
  padding: 0 12px;
  border-color: var(--line);
  background: #fffdf8;
  color: var(--accent-dark);
}

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

.tool-button:disabled,
.file-button.disabled {
  opacity: 0.58;
  cursor: wait;
}

.primary-button:disabled {
  opacity: 0.58;
  cursor: wait;
}

.ghost-button {
  background: transparent;
  color: var(--accent-dark);
}

.ghost-button.disabled {
  pointer-events: none;
  opacity: 0.42;
}

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

.render-state {
  display: grid;
  gap: 4px;
}

.render-state small {
  color: var(--muted);
  font-size: 12px;
}

.render-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.preview-pane {
  display: grid;
  grid-template-rows: auto 1fr;
  background: #f1eee8;
}

.preview-toolbar {
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.page-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.page-tabs button {
  min-width: 34px;
  min-height: 30px;
  padding: 0 9px;
  border-color: var(--line);
  background: #ffffff;
  color: var(--ink);
}

.page-tabs button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.preview-stage {
  position: relative;
  overflow: auto;
  padding: 24px;
  display: grid;
  place-items: start center;
}

#previewImage {
  display: none;
  width: min(100%, 760px);
  height: auto;
  box-shadow: 0 20px 42px rgba(31, 28, 23, 0.22);
  border-radius: 4px;
  background: white;
}

.empty-state {
  align-self: center;
  justify-self: center;
  color: var(--muted);
  border: 1px dashed #bfb5a6;
  border-radius: 8px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.72);
}

@media (max-width: 900px) {
  .app-shell {
    padding: 0;
  }

  .workspace {
    grid-template-columns: 1fr;
    min-height: 100vh;
    gap: 0;
  }

  .editor-pane,
  .preview-pane {
    border-left: 0;
    border-right: 0;
    box-shadow: none;
  }

  .editor-pane {
    min-height: 60vh;
  }

  .topbar,
  .import-pane,
  .answer-editor-header,
  .answer-editor-toolbar,
  .controls-pane,
  .actionbar,
  .preview-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .control-grid {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .preset-grid {
    grid-template-columns: repeat(2, minmax(140px, 1fr));
  }

  .import-command-row,
  .render-actions {
    width: 100%;
  }

  .simple-control-grid {
    grid-template-columns: 1fr;
  }

  textarea {
    min-height: 48vh;
  }
}

@media (max-width: 560px) {
  .control-grid,
  .preset-grid {
    grid-template-columns: 1fr;
  }

  .controls-header,
  .import-hero,
  .import-command-row,
  .mode-compact,
  .answer-editor-header,
  .answer-editor-toolbar,
  .sample-copy {
    align-items: flex-start;
    flex-direction: column;
  }

  .mode-segment,
  .render-actions,
  .render-actions > *,
  .answer-editor-toolbar button {
    width: 100%;
  }
}

/* Font compare */
.font-compare-bar {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.font-compare-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.font-compare-header strong {
  font-size: 13px;
}

.font-compare-header span {
  font-size: 12px;
  color: var(--muted);
  flex: 1;
}

.font-compare-panel {
  margin-top: 14px;
}

.font-compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.font-compare-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
}

.font-compare-card-label {
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 6px;
}

.font-compare-card-label .fc-badge {
  font-size: 10px;
  font-weight: 500;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--muted);
}

.font-compare-card-label .fc-badge.unavailable {
  background: #fef2f2;
  color: #b91c1c;
}

.font-compare-card img {
  width: 100%;
  display: block;
}

.font-compare-card-unavailable {
  padding: 24px 14px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.font-compare-card-unavailable code {
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 11px;
  background: var(--accent-soft);
  padding: 2px 5px;
  border-radius: 3px;
}