:root {
  --tool-bg: #ffffff;
  --tool-surface: #ffffff;
  --tool-line: #e5e5e5;
  --tool-line-strong: #d0d0d0;
  --tool-text: #171717;
  --tool-muted: #6b6b6b;
  --tool-primary: #10a37f;
  --tool-primary-strong: #0d8a6c;
  --tool-success: #08765b;
  --tool-danger: #b42318;
  --tool-chip: #f3f3f3;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body.tool-body {
  color: var(--tool-text);
  background: var(--tool-bg);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.tool-shell {
  width: min(1320px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 64px;
}

.tool-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 64px;
  padding: 0;
  border-bottom: 1px solid var(--tool-line);
}

.tool-brand {
  text-decoration: none;
  color: var(--tool-text);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -.02em;
}

.tool-brand::before {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: #fff;
  background: var(--tool-text);
  content: "D";
  font-size: 12px;
  font-weight: 750;
}

.tool-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tool-nav a {
  text-decoration: none;
  color: var(--tool-muted);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
}

.tool-nav a:hover,
.tool-nav a.active {
  color: var(--tool-text);
  background: var(--tool-chip);
  border-color: var(--tool-line);
}

.language-toggle {
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid var(--tool-line);
  border-radius: 8px;
  color: var(--tool-muted);
  background: #fff;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.language-toggle:hover {
  color: var(--tool-text);
  background: var(--tool-chip);
}

.tool-hero,
.tool-panel {
  margin-top: 14px;
  border: 1px solid var(--tool-line);
  border-radius: 14px;
  background: #fff;
}

.tool-hero {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-top: 0;
  padding: 64px 0 38px;
  border: 0;
  border-radius: 0;
}

.tool-eyebrow {
  margin: 0 0 8px;
  color: var(--tool-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 700;
}

.tool-hero h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: -.045em;
  font-weight: 620;
}

.tool-hero p {
  margin: 12px 0 0;
  max-width: 880px;
  color: var(--tool-muted);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.tool-link-btn,
.tool-btn {
  appearance: none;
  border: 1px solid var(--tool-line);
  border-radius: 9px;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease,
    transform 0.16s ease;
}

.tool-link-btn:hover,
.tool-btn:hover { background: #f3f3f3; }

.tool-link-btn {
  background: #fff;
  color: var(--tool-text);
}

.tool-link-btn.primary,
.tool-btn.primary {
  background: var(--tool-text);
  color: #fff;
  border-color: var(--tool-text);
}

.tool-link-btn.primary:hover,
.tool-btn.primary:hover {
  background: #333;
  border-color: #333;
}

.tool-btn.secondary,
.tool-link-btn.secondary {
  background: #fff;
  color: var(--tool-text);
}

.tool-panel {
  padding: 24px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-head h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 620;
  letter-spacing: -.02em;
}

.panel-note {
  color: var(--tool-muted);
  font-size: 14px;
}

.tool-category + .tool-category {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--tool-line);
}

.category-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.category-heading h3,
.category-heading p {
  margin: 0;
}

.category-heading h3 {
  font-size: 18px;
}

.category-heading p {
  max-width: 720px;
  color: var(--tool-muted);
  font-size: 14px;
  line-height: 1.65;
}

.tool-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  margin-bottom: 10px;
  padding: 3px 9px;
  border-radius: 999px;
  color: #08765b;
  background: #edf8f5;
  font-size: 12px;
  font-weight: 700;
}

.intro-card {
  position: relative;
  padding: 18px;
  border: 1px solid var(--tool-line);
  border-radius: 11px;
  background: #fff;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}

.intro-card h3,
.intro-card p {
  margin: 0;
}

.intro-card h3 {
  font-size: 17px;
}

.intro-card p {
  margin-top: 9px;
  color: var(--tool-muted);
  line-height: 1.65;
}

.intro-card .tool-link-btn {
  display: inline-flex;
}

.controls-card {
  border: 1px solid var(--tool-line);
  border-radius: 11px;
  padding: 16px;
  background: #f8f8f8;
}

.control-row,
.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.control-row + .action-row {
  margin-top: 14px;
}

.tool-field {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 9px;
  border: 1px solid var(--tool-line);
  background: #fff;
}

.tool-field span {
  font-size: 14px;
  color: var(--tool-muted);
}

.tool-field select {
  border: none;
  background: transparent;
  color: var(--tool-text);
  font-size: 14px;
  min-width: 200px;
  outline: none;
}

.tool-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid var(--tool-line);
  background: #fff;
  font-size: 14px;
  color: var(--tool-text);
}

.tool-option input {
  margin: 0;
}

.tool-banner {
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid var(--tool-line);
  border-radius: 11px;
  background: #f8f8f8;
  color: var(--tool-muted);
}

.tool-banner p {
  margin: 0;
}

.tool-banner ul {
  margin: 0;
  padding-left: 20px;
  line-height: 1.7;
}

.tool-banner code {
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.72);
}

.status-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 28px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.status-pill[hidden] {
  display: none;
}

.status-pill.success {
  color: var(--tool-success);
  background: rgba(19, 138, 79, 0.1);
}

.status-pill.error {
  color: var(--tool-danger);
  background: rgba(180, 35, 24, 0.1);
}

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

.editor-card {
  display: flex;
  flex-direction: column;
  min-height: 720px;
}

.editor-label {
  margin-bottom: 8px;
  color: var(--tool-muted);
  font-size: 13px;
}

.monaco-host {
  position: relative;
  flex: 1;
  min-height: 680px;
  border: 1px solid var(--tool-line-strong);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.monaco-host .monaco-editor {
  opacity: 1;
  transition: opacity 0.14s ease;
}

.monaco-host.is-loading .monaco-editor {
  opacity: 0;
}

.monaco-host.is-loading::before,
.monaco-host.is-error::before {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--tool-muted);
  background: #f8f8f8;
  font-size: 14px;
  pointer-events: none;
}

.monaco-host.is-loading::before {
  content: attr(data-loading-text);
}

.monaco-host.is-error::before {
  content: "编辑器加载失败，请刷新页面后重试";
  color: var(--tool-danger);
  background: #fff5f4;
}

html[lang="en"] .monaco-host.is-error::before {
  content: "The editor failed to load. Refresh the page and try again.";
}

.diff-host {
  min-height: 760px;
}

.monaco-host.monaco-visibility-fallback .monaco-editor,
.monaco-host.monaco-visibility-fallback .monaco-diff-editor,
.monaco-host.monaco-visibility-fallback .view-lines,
.monaco-host.monaco-visibility-fallback .view-line,
.monaco-host.monaco-visibility-fallback .view-line span,
.monaco-host.monaco-visibility-fallback .mtk1,
.monaco-host.monaco-visibility-fallback .mtk2,
.monaco-host.monaco-visibility-fallback .mtk3,
.monaco-host.monaco-visibility-fallback .mtk4,
.monaco-host.monaco-visibility-fallback .mtk5,
.monaco-host.monaco-visibility-fallback .mtk6,
.monaco-host.monaco-visibility-fallback .mtk7,
.monaco-host.monaco-visibility-fallback .mtk8,
.monaco-host.monaco-visibility-fallback .mtk9,
.monaco-host.monaco-visibility-fallback .mtk10,
.monaco-host.monaco-visibility-fallback .mtk11,
.monaco-host.monaco-visibility-fallback .mtk12,
.monaco-host.monaco-visibility-fallback .mtk13,
.monaco-host.monaco-visibility-fallback .mtk14,
.monaco-host.monaco-visibility-fallback .mtk15,
.monaco-host.monaco-visibility-fallback .mtk16,
.monaco-host.monaco-visibility-fallback .mtk17,
.monaco-host.monaco-visibility-fallback .mtk18,
.monaco-host.monaco-visibility-fallback .mtk19,
.monaco-host.monaco-visibility-fallback .mtk20 {
  color: #111111 !important;
  -webkit-text-fill-color: #111111 !important;
  opacity: 1 !important;
  text-shadow: none !important;
  mix-blend-mode: normal !important;
}

.tool-empty {
  margin: 14px 0 0;
  color: var(--tool-muted);
  font-size: 14px;
}

.tool-noscript {
  margin-top: 16px;
  border: 1px solid #ffd7d2;
  border-radius: 14px;
  padding: 12px 14px;
  color: var(--tool-danger);
  background: #fff5f4;
}

@media (max-width: 1080px) {
  .editor-grid {
    grid-template-columns: 1fr;
  }

  .editor-card {
    min-height: 560px;
  }

  .monaco-host,
  .diff-host {
    min-height: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .monaco-host .monaco-editor {
    transition: none;
  }
}

@media (max-width: 840px) {
  .tool-topbar,
  .tool-hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .tool-field {
    width: 100%;
    justify-content: space-between;
  }

  .tool-field select {
    min-width: 0;
    width: 100%;
  }
}

@media (max-width: 560px) {
  .tool-shell {
    width: min(100% - 24px, 1320px);
    padding: 0 0 42px;
  }

  .tool-panel,
  .tool-hero {
    padding: 18px;
  }

  .tool-topbar { padding: 14px 0; }

  .tool-nav {
    gap: 8px;
  }

  .action-row {
    align-items: stretch;
  }

  .tool-btn,
  .tool-link-btn {
    width: 100%;
    justify-content: center;
  }

  .status-strip {
    width: 100%;
  }
}