:root {
  color-scheme: light;
  --bg: #f7f5ef;
  --surface: #fffefa;
  --surface-strong: #ffffff;
  --text: #202124;
  --muted: #62645f;
  --border: #d8d3c7;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: #d8f3ef;
  --danger: #b42318;
  --danger-soft: #fde7e5;
  --ok: #137333;
  --ok-soft: #e1f3e8;
  --code-bg: #fbfaf6;
  --shadow: 0 16px 40px rgba(32, 33, 36, 0.08);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111315;
  --surface: #181b1f;
  --surface-strong: #20242a;
  --text: #f3f1ea;
  --muted: #aaa69d;
  --border: #343941;
  --accent: #35c2a6;
  --accent-strong: #66d9c1;
  --accent-soft: #133a35;
  --danger: #ff9b91;
  --danger-soft: #3d201f;
  --ok: #8bd99b;
  --ok-soft: #193523;
  --code-bg: #121518;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.1), transparent 260px),
    var(--bg);
  color: var(--text);
}

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

button,
select,
input {
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-strong);
  color: var(--text);
}

.locale-switcher {
  min-width: 96px;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 84px;
  padding: 0 14px;
  cursor: pointer;
}

button:hover,
select:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
textarea:focus-visible,
pre:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 2px;
}

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

.primary-button:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0;
}

.brand,
.text-link {
  color: var(--text);
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 14px;
}

.header-actions,
.toolbar,
.toolbar-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-button {
  min-width: 40px;
  width: 40px;
  padding: 0;
}

.text-link {
  color: var(--muted);
  font-size: 14px;
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 56px;
}

.tool-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  padding: 34px 0 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 10px;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 0.95;
  letter-spacing: 0;
}

.lede {
  max-width: 640px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.status-strip {
  min-width: 180px;
  max-width: 360px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 14px;
  box-shadow: var(--shadow);
}

.status-strip.ok {
  border-color: color-mix(in srgb, var(--ok) 45%, var(--border));
  background: var(--ok-soft);
  color: var(--ok);
}

.status-strip.error {
  border-color: color-mix(in srgb, var(--danger) 45%, var(--border));
  background: var(--danger-soft);
  color: var(--danger);
}

.main-layout {
  display: block;
}

.workspace {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.toolbar {
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 14px;
  border-bottom: 1px solid var(--border);
}

.toolbar-right {
  margin-left: auto;
}

.select-label {
  color: var(--muted);
  font-size: 14px;
}

select {
  min-width: 112px;
  padding: 0 30px 0 10px;
}

.inline-input {
  width: min(240px, 44vw);
  padding: 0 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.editor-grid,
.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 560px;
}

.diff-grid {
  grid-template-rows: minmax(320px, auto) minmax(240px, auto);
}

.editor-panel {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
}

.editor-panel + .editor-panel {
  border-left: 1px solid var(--border);
}

.diff-output {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 48px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-strong) 72%, var(--bg));
}

.panel-header h2 {
  margin: 0;
  font-size: 14px;
}

.panel-header span {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

textarea,
pre {
  width: 100%;
  min-width: 0;
  height: 100%;
  margin: 0;
  padding: 18px;
  border: 0;
  background: var(--code-bg);
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 14px;
  line-height: 1.65;
  letter-spacing: 0;
  tab-size: 2;
  direction: ltr;
  text-align: left;
}

textarea {
  resize: none;
}

pre {
  overflow: auto;
  white-space: pre;
}

pre.rich-output {
  white-space: normal;
}

.diff-view {
  display: grid;
  gap: 12px;
  direction: ltr;
  text-align: left;
}

.diff-hunk {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.diff-hunk-title {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-strong) 70%, var(--bg));
  color: var(--muted);
  font-size: 12px;
}

.diff-line {
  padding: 8px 12px;
  white-space: pre-wrap;
}

.diff-line + .diff-line {
  border-top: 1px solid color-mix(in srgb, var(--border) 65%, transparent);
}

.diff-line-remove {
  background: color-mix(in srgb, var(--danger-soft) 78%, transparent);
  color: var(--danger);
}

.diff-line-add {
  background: color-mix(in srgb, var(--ok-soft) 78%, transparent);
  color: var(--ok);
}

.diff-empty {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
}

.message {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 14px;
}

.related-section,
.faq-section {
  padding-top: 42px;
}

.section-heading h2 {
  margin-bottom: 18px;
  font-size: 28px;
  line-height: 1.15;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.related-tool {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

.related-tool:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
}

.details {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  padding: 42px 0 0;
}

.details h2 {
  margin-bottom: 8px;
  font-size: 18px;
}

.details p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.7;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.faq-list summary {
  cursor: pointer;
  padding: 16px;
  font-weight: 700;
}

.faq-list details p {
  margin: 0;
  padding: 0 16px 16px;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 820px) {
  .tool-hero,
  .editor-grid,
  .diff-grid,
  .details,
  .main-layout,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .tool-hero {
    padding-top: 20px;
  }

  .status-strip {
    max-width: none;
  }

  .editor-grid {
    min-height: auto;
  }

  .editor-panel {
    min-height: 380px;
  }

  .editor-panel + .editor-panel {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .diff-output {
    grid-column: auto;
  }
}

@media (max-width: 560px) {
  .site-header,
  main {
    width: min(100% - 20px, 1180px);
  }

  .toolbar,
  .toolbar-group {
    align-items: stretch;
    width: 100%;
  }

  .header-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .toolbar-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .toolbar-group:nth-child(2) {
    grid-template-columns: auto 1fr;
  }

  button {
    min-width: 0;
    padding-inline: 10px;
  }

  .toolbar-right {
    margin-left: 0;
  }

  textarea,
  pre {
    padding: 14px;
    font-size: 13px;
  }
}