:root {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #ffffff;
  --field: #ffffff;
  --card: #ffffff;
  --text: #111111;
  --muted: #747474;
  --line: #e8e8e8;
  --soft: #f6f6f6;
  --active: #111111;
  --active-text: #ffffff;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f0f10;
  --panel: #151516;
  --field: #101011;
  --card: #19191a;
  --text: #f3f3f3;
  --muted: #a1a1a1;
  --line: #303033;
  --soft: #232326;
  --active: #f3f3f3;
  --active-text: #111111;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

button,
textarea,
select {
  font: inherit;
}

.app-shell {
  width: min(640px, calc(100vw - 28px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  place-items: center;
  padding: 28px 0;
}

.control-panel {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px;
}

.brand-row,
.results-heading,
.action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 28px;
  line-height: 1.1;
}

h2 {
  font-size: 16px;
  font-weight: 800;
}

.status-pill {
  min-width: 48px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.theme-toggle {
  width: 36px;
  min-width: 36px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  color: var(--text);
  background: var(--soft);
  font-size: 12px;
  font-weight: 900;
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--active);
  outline-offset: 2px;
}

.control-group,
.input-block,
.slider-grid {
  display: grid;
  gap: 9px;
  margin-top: 18px;
}

.group-label,
.input-block span,
.slider-block span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.slider-grid {
  gap: 14px;
}

.slider-block {
  display: grid;
  gap: 9px;
}

.slider-block > span {
  display: flex;
  justify-content: space-between;
}

.slider-block strong {
  color: var(--text);
}

.elastic-slider {
  width: 100%;
  height: 36px;
  margin: 0;
  padding: 0;
  accent-color: var(--active);
  cursor: pointer;
  background: transparent;
  outline: none;
}

.elastic-slider:focus-visible {
  outline: 2px solid var(--active);
  outline-offset: 2px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.quick-presets {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.control-group:nth-of-type(3) .segmented {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.segment,
.preset-button,
.primary-button,
.secondary-button,
.copy-button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  background: var(--soft);
}

.segment.is-active {
  border-color: var(--active);
  background: var(--active);
  color: var(--active-text);
  font-weight: 800;
}

.preset-button {
  min-height: 40px;
  font-size: 14px;
  font-weight: 800;
}

.preset-button.is-active {
  border-color: var(--active);
  background: var(--active);
  color: var(--active-text);
}

textarea {
  width: 100%;
  resize: vertical;
  min-height: 92px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  outline: none;
  color: var(--text);
  background: var(--field);
}

textarea:focus {
  border-color: var(--active);
}

.results-heading {
  align-items: flex-start;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

#detectSummary {
  max-width: 260px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  text-align: right;
}

.result-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.result-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 72px;
  gap: 12px;
  align-items: center;
  min-height: 76px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--card);
}

.result-meta {
  display: none;
}

.result-text {
  margin: 0;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.22;
  word-break: break-word;
}

.copy-button {
  width: 72px;
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
}

.copy-button.is-copied {
  border-color: var(--active);
  background: var(--active);
  color: var(--active-text);
}

.action-row {
  margin-top: 16px;
}

.primary-button,
.secondary-button {
  flex: 1;
  font-weight: 900;
}

.primary-button {
  border-color: var(--active);
  color: var(--active-text);
  background: var(--active);
}

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

.empty-state {
  display: grid;
  min-height: 180px;
  place-items: center;
  color: var(--muted);
  text-align: center;
}

.feedback-panel {
  margin-top: 14px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.feedback-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 36px;
  cursor: pointer;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  list-style: none;
}

.feedback-panel summary::-webkit-details-marker {
  display: none;
}

.feedback-panel summary strong {
  color: var(--text);
  font-size: 12px;
}

.feedback-grid {
  display: grid;
  gap: 12px;
  padding-top: 10px;
}

.feedback-field {
  display: grid;
  gap: 8px;
}

.feedback-field > span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 10px;
  color: var(--text);
  background: var(--field);
  outline: none;
}

select:focus {
  border-color: var(--active);
}

.feedback-tags {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.feedback-tags button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  background: var(--soft);
  font-size: 13px;
  font-weight: 800;
}

.feedback-tags button.is-active {
  border-color: var(--active);
  color: var(--active-text);
  background: var(--active);
}

.feedback-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100vw - 18px, 640px);
    align-items: start;
    padding: 10px 0;
  }

  .control-panel {
    padding: 16px;
  }

  h1 {
    font-size: 24px;
  }

  #detectSummary {
    max-width: 180px;
  }

  .result-card {
    grid-template-columns: 1fr;
  }

  .quick-presets {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .copy-button {
    width: 100%;
  }

  .feedback-tags {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feedback-actions {
    grid-template-columns: 1fr;
  }
}