:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --surface-3: #eef2f7;
  --text: #172033;
  --text-soft: #5d687c;
  --text-faint: #8b95a7;
  --border: #e2e7ef;
  --border-strong: #cfd7e4;
  --navy: #172447;
  --primary: #5b5ce2;
  --primary-dark: #4949c5;
  --primary-soft: #eeeeff;
  --cyan: #26b7c9;
  --green: #19a974;
  --green-soft: #e9faf3;
  --red: #e35d6a;
  --red-soft: #fff0f1;
  --amber: #d99316;
  --shadow: 0 10px 35px rgba(30, 45, 76, .07);
  --radius: 16px;
  --sidebar: 248px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111522;
  --surface: #191f2f;
  --surface-2: #151a28;
  --surface-3: #222a3e;
  --text: #eef1f7;
  --text-soft: #a6afc1;
  --text-faint: #737e94;
  --border: #2b3449;
  --border-strong: #3b465e;
  --navy: #111827;
  --primary: #7879f1;
  --primary-dark: #6667da;
  --primary-soft: #272749;
  --green-soft: #17392f;
  --red-soft: #3c2229;
  --shadow: 0 12px 36px rgba(0, 0, 0, .22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button, input, textarea { font: inherit; }
button { color: inherit; }
button, label[for], .dropzone { -webkit-tap-highlight-color: transparent; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  width: var(--sidebar);
  display: flex;
  flex-direction: column;
  padding: 26px 18px 20px;
  color: #fff;
  background:
    radial-gradient(circle at -10% 80%, rgba(80, 99, 204, .25), transparent 40%),
    linear-gradient(180deg, #16213e 0%, #111a31 100%);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 28px;
  color: inherit;
  text-decoration: none;
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: 0 0 42px;
  border-radius: 13px;
  box-shadow: 0 8px 22px rgba(91, 92, 226, .3);
}
.brand-mark img { width: 100%; height: 100%; display: block; }
.brand strong { display: block; font-size: 17px; letter-spacing: -.2px; }
.brand small { display: block; margin-top: 2px; color: #8d99b3; font-size: 11px; }
.nav { display: grid; gap: 7px; }
.nav-label {
  margin: 2px 10px 7px;
  color: #68758e;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.3px;
  text-transform: uppercase;
}
.nav-item {
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: 32px 1fr auto;
  align-items: center;
  gap: 6px;
  padding: 7px 11px;
  border: 0;
  border-radius: 10px;
  color: #9da9c0;
  background: transparent;
  font-size: 13px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: .2s ease;
}
.nav-item:hover { color: #fff; background: rgba(255, 255, 255, .06); }
.nav-item.is-active {
  color: #fff;
  background: linear-gradient(90deg, rgba(105, 107, 237, .25), rgba(105, 107, 237, .08));
  box-shadow: inset 3px 0 #7778f5;
}
.nav-icon { display: grid; place-items: center; }
.nav-icon svg { width: 18px; height: 18px; }
.nav-count {
  min-width: 22px;
  padding: 3px 6px;
  border-radius: 10px;
  color: #828faa;
  background: rgba(255, 255, 255, .06);
  font-size: 10px;
  text-align: center;
}
.nav-item.is-active .nav-count { color: #d9dcff; background: rgba(119, 120, 245, .2); }
.privacy-note {
  display: flex;
  gap: 10px;
  margin-top: auto;
  padding: 14px 12px;
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: 12px;
  background: rgba(255, 255, 255, .035);
}
.privacy-icon { color: #45d2b0; }
.privacy-icon svg { width: 18px; height: 18px; }
.privacy-note strong { font-size: 11px; }
.privacy-note p { margin: 5px 0 0; color: #7f8aa2; font-size: 10px; line-height: 1.5; }

.main-area { min-height: 100vh; margin-left: var(--sidebar); }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 32px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  backdrop-filter: blur(12px);
}
.topbar-page-heading { min-width: 0; display: flex; align-items: center; gap: 13px; margin-right: auto; }
.topbar-kicker {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-right: 13px;
  border-right: 1px solid var(--border);
  color: var(--primary);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .8px;
  text-transform: uppercase;
  white-space: nowrap;
}
.heading-mark { width: 5px; height: 20px; border-radius: 4px; background: linear-gradient(180deg, var(--primary), var(--cyan)); }
.topbar-page-copy { min-width: 0; }
.topbar-page-copy h1 { overflow: hidden; font-size: 17px; line-height: 1.2; letter-spacing: -.2px; white-space: nowrap; text-overflow: ellipsis; }
.topbar-page-copy p { margin: 4px 0 0; overflow: hidden; color: var(--text-faint); font-size: 12px; white-space: nowrap; text-overflow: ellipsis; }
.topbar-context-actions { display: flex; align-items: center; }
.topbar-page-actions { display: none; }
.topbar-page-actions.is-active { display: flex; align-items: center; }
.browser-status { display: flex; align-items: center; gap: 7px; color: var(--text-soft); font-size: 12px; font-weight: 600; white-space: nowrap; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #23c98d; box-shadow: 0 0 0 4px rgba(35, 201, 141, .1); }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.language-switcher { position: relative; z-index: 30; }
.language-switcher-button {
  height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 8px 4px 6px;
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text-soft);
  background: var(--surface);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.language-switcher-button:hover,
.language-switcher.is-open .language-switcher-button {
  border-color: color-mix(in srgb, var(--primary) 52%, var(--border));
  background: var(--primary-soft);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 9%, transparent);
}
.language-current-flag,
.language-option-flag {
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 4px;
  box-shadow: 0 0 0 1px rgba(20, 28, 48, .12);
}
.language-current-flag { width: 22px; height: 15px; }
.language-current-flag svg,
.language-option-flag svg { width: 100%; height: 100%; }
.language-current-code { min-width: 15px; text-align: center; }
.language-chevron { width: 10px; height: 7px; color: var(--text-faint); transition: transform .2s ease; }
.language-switcher.is-open .language-chevron { transform: rotate(180deg); }
.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 230px;
  display: none;
  padding: 7px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 16px 42px rgba(22, 33, 59, .18);
}
.language-switcher.is-open .language-menu { display: grid; gap: 3px; animation: languageMenuIn .16s ease; }
@keyframes languageMenuIn { from { opacity: 0; transform: translateY(-4px); } }
.language-option {
  width: 100%;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 24px 18px;
  align-items: center;
  gap: 9px;
  padding: 9px;
  border: 0;
  border-radius: 8px;
  color: var(--text-soft);
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.language-option:hover { background: var(--surface-2); }
.language-option.is-selected { color: var(--primary); background: var(--primary-soft); }
.language-option-flag { width: 28px; height: 19px; }
.language-option-copy strong,
.language-option-copy small { display: block; }
.language-option-copy strong { color: var(--text); font-size: 13px; }
.language-option-copy small { margin-top: 2px; color: var(--text-faint); font-size: 11px; }
.language-option-code { color: var(--text-faint); font-size: 11px; font-weight: 700; }
.language-check { width: 15px; height: 15px; color: var(--primary); opacity: 0; }
.language-option.is-selected .language-check { opacity: 1; }
.icon-button {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
  cursor: pointer;
  transition: .2s ease;
}
.icon-button:hover { border-color: var(--border-strong); background: var(--surface-2); }
.icon-button svg { width: 17px; height: 17px; }
.icon-button.small { width: 30px; height: 30px; border: 0; color: var(--text-faint); }
.shortcut-hint {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 7px 5px 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text-faint);
  background: var(--surface);
  font-size: 12px;
  cursor: pointer;
}
kbd {
  min-width: 20px;
  padding: 3px 5px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--text-soft);
  background: var(--surface-2);
  font-size: 10px;
  font-family: inherit;
  text-align: center;
}
.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }
.menu-toggle { display: none; }
.topbar .button,
.topbar .segmented button { font-size: 12px; }

main {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 24px 24px 60px;
  font-size: 12px;
}
.page { display: none; animation: pageIn .24s ease; }
.page.is-active { display: block; }
@keyframes pageIn { from { opacity: 0; transform: translateY(4px); } }
h1 { margin: 0; font-size: clamp(25px, 3vw, 32px); line-height: 1.2; letter-spacing: -.8px; }
h2 { margin: 0; font-size: 14px; letter-spacing: -.1px; }

.tool-tabs {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 20px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface);
  box-shadow: 0 4px 15px rgba(30, 45, 76, .03);
}
.tool-tab {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 15px;
  border: 0;
  border-radius: 8px;
  color: var(--text-soft);
  background: transparent;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}
.tool-tab svg { width: 15px; height: 15px; }
.tool-tab:hover { color: var(--text); background: var(--surface-2); }
.tool-tab.is-active { color: var(--primary); background: var(--primary-soft); }
.tool-panel { display: none; }
.tool-panel.is-active { display: block; animation: pageIn .2s ease; }

.card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.split-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.split-grid > .card { min-width: 0; padding: 22px; }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 19px; }
.card-header > div { display: flex; align-items: center; gap: 9px; }
.step { color: var(--primary); font-size: 10px; font-weight: 800; letter-spacing: .8px; }
.format-badge, .detected-badge {
  padding: 5px 8px;
  border-radius: 6px;
  color: var(--text-faint);
  background: var(--surface-2);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .4px;
}
.detected-badge.json { color: #9a680b; background: #fff5d8; }
.detected-badge.xml { color: #147f70; background: #e5f9f5; }
[data-theme="dark"] .detected-badge.json { color: #f4c96d; background: #3d341e; }
[data-theme="dark"] .detected-badge.xml { color: #66d9c4; background: #183a36; }
.dropzone {
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 20px;
  border: 1.5px dashed var(--border-strong);
  border-radius: 12px;
  color: var(--text-soft);
  background: var(--surface-2);
  text-align: center;
  cursor: pointer;
  transition: .2s ease;
}
.dropzone:hover, .dropzone.is-dragging { border-color: var(--primary); background: var(--primary-soft); }
.dropzone input { display: none; }
.dropzone strong { color: var(--text); font-size: 12px; }
.dropzone span { font-size: 10px; }
.dropzone u { color: var(--primary); font-weight: 600; text-underline-offset: 2px; }
.dropzone small { margin-top: 3px; color: var(--text-faint); font-size: 9px; }
.upload-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; color: var(--primary); background: var(--primary-soft); }
.upload-icon svg { width: 18px; height: 18px; }
.dropzone.compact { min-height: 142px; }
.file-summary {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-top: 12px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
}
.is-hidden { display: none !important; }
.file-thumb { width: 42px; height: 42px; border-radius: 7px; background-size: cover; background-position: center; }
.file-type-icon { min-width: 42px; height: 42px; display: grid; place-items: center; border-radius: 8px; color: var(--primary); background: var(--primary-soft); font-size: 8px; font-weight: 800; }
.file-meta { min-width: 0; flex: 1; }
.file-meta strong, .file-meta span { display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.file-meta strong { font-size: 11px; }
.file-meta span { margin-top: 4px; color: var(--text-faint); font-size: 9px; }
.field-group { display: flex; flex-direction: column; gap: 7px; margin-top: 17px; }
.field-group.grow { flex: 1; }
.field-group > label, .field-label label { color: var(--text-soft); font-size: 10px; font-weight: 700; }
.field-label, .editor-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 24px; }
.label-actions { display: flex; align-items: center; gap: 10px; }
.char-count { color: var(--text-faint); font-size: 9px; white-space: nowrap; }
.text-action {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px;
  border: 0;
  color: var(--primary);
  background: transparent;
  font-size: 9px;
  font-weight: 700;
  cursor: pointer;
}
.text-action:hover { color: var(--primary-dark); }
.text-action svg { width: 12px; height: 12px; }
textarea, input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  color: var(--text);
  background: var(--surface-2);
  transition: border-color .2s, box-shadow .2s;
}
textarea {
  resize: vertical;
  padding: 12px 13px;
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  line-height: 1.7;
}
input { height: 40px; padding: 0 12px; font-size: 11px; }
textarea:focus, input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 12%, transparent); }
textarea::placeholder, input::placeholder { color: var(--text-faint); }
textarea[readonly] { color: var(--text-soft); }
.button-row { display: flex; gap: 9px; margin-top: 14px; }
.button {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 15px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: .2s ease;
}
.button svg { width: 15px; height: 15px; }
.button.primary { color: #fff; background: var(--primary); box-shadow: 0 5px 14px rgba(91, 92, 226, .2); }
.button.primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.button.secondary { border-color: var(--border); color: var(--text-soft); background: var(--surface); }
.button.secondary:hover { border-color: var(--primary); color: var(--primary); }
.button:disabled { opacity: .45; cursor: not-allowed; transform: none !important; }
.button.full { width: 100%; margin-top: 17px; }
.button.compact-button { min-height: 34px; padding: 7px 12px; white-space: nowrap; }
.image-preview {
  min-height: 145px;
  display: grid;
  place-items: center;
  margin-top: 14px;
  padding: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 11px;
  background-color: var(--surface-2);
  background-image: linear-gradient(45deg, var(--surface-3) 25%, transparent 25%), linear-gradient(-45deg, var(--surface-3) 25%, transparent 25%), linear-gradient(45deg, transparent 75%, var(--surface-3) 75%), linear-gradient(-45deg, transparent 75%, var(--surface-3) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}
.image-preview.empty { display: flex; flex-direction: column; gap: 8px; color: var(--text-faint); font-size: 9px; background-image: none; }
.image-preview.empty svg { width: 26px; height: 26px; opacity: .5; }
.image-preview img { max-width: 100%; max-height: 280px; object-fit: contain; border-radius: 5px; }

.workspace-card { padding: 0; overflow: hidden; }
.workspace-toolbar { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 21px; border-bottom: 1px solid var(--border); }
.workspace-toolbar p { margin: 5px 0 0; color: var(--text-faint); font-size: 10px; }
.editor-grid { min-height: 410px; display: grid; grid-template-columns: minmax(0, 1fr) 68px minmax(0, 1fr); }
.editor-pane { min-width: 0; display: flex; flex-direction: column; padding: 16px 18px 19px; }
.editor-pane + .editor-pane { border-left: 1px solid var(--border); }
.editor-head { margin-bottom: 8px; }
.editor-head label { color: var(--text-soft); font-size: 10px; font-weight: 700; }
.code-area { flex: 1; min-height: 280px; resize: none; }
.convert-rail, .center-action { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 7px; border-left: 1px solid var(--border); border-right: 1px solid var(--border); background: var(--surface-2); }
.convert-rail > span { margin-bottom: 8px; color: var(--text-faint); font-size: 8px; }
.round-action {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--primary);
  background: var(--surface);
  box-shadow: 0 3px 10px rgba(30, 45, 76, .06);
  cursor: pointer;
}
.round-action:hover { border-color: var(--primary); background: var(--primary-soft); }
.round-action svg { width: 14px; height: 14px; }
.round-action.large { width: 42px; height: 42px; color: #fff; background: var(--primary); }
.editor-grid.simple { grid-template-columns: minmax(0, 1fr) 76px minmax(0, 1fr); }
.segmented { display: inline-flex; padding: 3px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); }
.segmented button { padding: 7px 12px; border: 0; border-radius: 6px; color: var(--text-faint); background: transparent; font-size: 9px; font-weight: 700; cursor: pointer; }
.segmented button.is-active { color: var(--primary); background: var(--surface); box-shadow: 0 2px 7px rgba(25, 39, 68, .08); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row .field-group { margin-top: 0; }
.file-tools .card { display: flex; flex-direction: column; }

.transform-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 20px; }
.transform-options { padding: 20px 13px; }
.transform-options > h2, .transform-options > p { padding: 0 8px; }
.transform-options > p { margin: 5px 0 16px; color: var(--text-faint); font-size: 9px; }
.transform-option {
  width: 100%;
  display: grid;
  grid-template-columns: 36px 1fr auto;
  align-items: center;
  gap: 9px;
  margin: 4px 0;
  padding: 9px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}
.transform-option:hover { background: var(--surface-2); }
.transform-option.is-active { border-color: color-mix(in srgb, var(--primary) 30%, var(--border)); background: var(--primary-soft); }
.option-icon { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 8px; color: var(--text-soft); background: var(--surface-3); font-size: 11px; font-weight: 800; }
.transform-option.is-active .option-icon { color: var(--primary); background: var(--surface); }
.transform-option strong, .transform-option small { display: block; }
.transform-option strong { font-size: 10px; }
.transform-option small { margin-top: 3px; color: var(--text-faint); font-size: 7px; letter-spacing: .25px; }
.transform-option kbd { opacity: 0; }
.transform-option:hover kbd, .transform-option.is-active kbd { opacity: 1; }
.transform-workspace { min-height: 560px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: hidden; }
.text-pane { display: flex; flex-direction: column; min-width: 0; padding: 20px; }
.text-pane textarea { flex: 1; min-height: 450px; resize: none; border: 0; padding: 16px 2px; background: transparent; font-family: inherit; font-size: 13px; line-height: 1.8; box-shadow: none; }
.output-pane { border-left: 1px solid var(--border); background: var(--surface-2); }

.diff-actions { display: flex; align-items: center; gap: 10px; }
.diff-card { position: relative; overflow: visible; }
.diff-editors { min-height: 345px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.diff-input-pane { min-width: 0; display: flex; flex-direction: column; padding: 20px; }
.diff-input-pane + .diff-input-pane { border-left: 1px solid var(--border); }
.diff-pane-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 8px; }
.diff-pane-head > div { display: flex; align-items: center; gap: 7px; }
.diff-pane-head label { font-size: 10px; font-weight: 700; }
.side-indicator { width: 6px; height: 6px; border-radius: 50%; }
.side-indicator.left { background: var(--red); }
.side-indicator.right { background: var(--green); }
.diff-input-pane textarea { flex: 1; min-height: 285px; resize: none; }
.swap-diff {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--primary);
  background: var(--surface);
  box-shadow: 0 5px 14px rgba(24, 38, 67, .12);
  transform: translate(-50%, -50%) rotate(90deg);
  cursor: pointer;
}
.swap-diff:hover { border-color: var(--primary); }
.swap-diff svg { width: 15px; height: 15px; }
.result-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 28px 3px 11px; }
.result-toolbar > div { display: flex; align-items: center; gap: 18px; }
.diff-stats { display: flex; gap: 13px; }
.stat { display: flex; align-items: center; gap: 4px; color: var(--text-faint); font-size: 9px; }
.stat i { width: 6px; height: 6px; border-radius: 50%; }
.stat.added i { background: var(--green); }
.stat.removed i { background: var(--red); }
.stat.changed i { background: var(--amber); }
.stat strong { color: var(--text-soft); }
.comparison-time { color: var(--text-faint); font-size: 9px; }
.diff-output { max-height: 540px; overflow: auto; font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; font-size: 10px; line-height: 1.65; }
.diff-row { display: grid; grid-template-columns: 42px minmax(0, 1fr) 42px minmax(0, 1fr); border-bottom: 1px solid var(--border); }
.diff-row:last-child { border-bottom: 0; }
.diff-line-no { padding: 5px 9px; color: var(--text-faint); background: var(--surface-2); text-align: right; user-select: none; }
.diff-line { min-height: 27px; padding: 5px 10px; white-space: pre-wrap; overflow-wrap: anywhere; }
.diff-line.left { border-right: 1px solid var(--border); }
.diff-line.removed { color: #a33a47; background: var(--red-soft); }
.diff-line.added { color: #087c54; background: var(--green-soft); }
.diff-line.changed-left { color: #9b4d29; background: #fff5e8; }
.diff-line.changed-right { color: #6f6615; background: #fffbe4; }
[data-theme="dark"] .diff-line.changed-left { color: #e7a17c; background: #3c2b25; }
[data-theme="dark"] .diff-line.changed-right { color: #d8cf6c; background: #393620; }
.empty-comparison { min-height: 240px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--text-faint); text-align: center; }
.empty-comparison > span { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; color: var(--primary); background: var(--primary-soft); }
.empty-comparison h2 { margin-top: 15px; color: var(--text-soft); }
.empty-comparison p { margin: 7px 0 0; font-size: 10px; }

.toast-region { position: fixed; z-index: 100; right: 24px; bottom: 24px; display: grid; gap: 8px; }
.toast {
  min-width: 260px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 12px 35px rgba(18, 32, 61, .16);
  font-size: 10px;
  animation: toastIn .25s ease;
}
.toast::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.toast.error::before { background: var(--red); }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } }
.sidebar-overlay { display: none; }

/* Functional workspace text stays comfortably readable at every viewport. */
main :is(
  button,
  input,
  textarea,
  label,
  small,
  p,
  .step,
  .format-badge,
  .detected-badge,
  .dropzone span,
  .file-type-icon,
  .file-meta strong,
  .file-meta span,
  .char-count,
  .text-action,
  .image-preview,
  .convert-rail > span,
  .option-icon,
  .transform-option strong,
  .stat,
  .comparison-time,
  .diff-output
) {
  font-size: 12px;
}

@media (max-width: 1050px) {
  :root { --sidebar: 216px; }
  .topbar { gap: 12px; padding: 0 20px; }
  .topbar-kicker, .browser-status { display: none; }
  main { padding: 20px 20px 50px; }
  .transform-layout { grid-template-columns: 220px minmax(0, 1fr); }
}

@media (max-width: 820px) {
  .sidebar { width: 248px; transform: translateX(-100%); transition: transform .25s ease; }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-overlay { position: fixed; inset: 0; z-index: 19; background: rgba(10, 17, 32, .45); backdrop-filter: blur(2px); }
  .sidebar-overlay.is-visible { display: block; }
  .main-area { margin-left: 0; }
  .menu-toggle { display: grid; }
  .topbar { padding: 0 20px; }
  main { padding: 18px 20px 45px; }
  .split-grid, .transform-layout { grid-template-columns: 1fr; }
  .transform-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .transform-options > h2, .transform-options > p { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .shortcut-hint { display: none; }
  .topbar { min-height: 64px; padding: 8px 14px; }
  .topbar-page-heading { gap: 8px; }
  .topbar-page-copy p { display: none; }
  .topbar-page-copy h1 { font-size: 15px; }
  .topbar-actions { gap: 7px; }
  .topbar[data-page="diff"] { flex-wrap: wrap; }
  .topbar[data-page="diff"] .topbar-context-actions { order: 5; width: 100%; }
  .topbar[data-page="diff"] .topbar-page-actions { width: 100%; }
  .topbar[data-page="diff"] .diff-actions { width: 100%; }
  .topbar[data-page="diff"] .segmented { flex: 1; }
  .topbar[data-page="diff"] .segmented button { flex: 1; }
  main { padding: 16px 14px 38px; }
  .tool-tabs { width: 100%; overflow-x: auto; }
  .tool-tab { flex: 1 0 auto; justify-content: center; padding: 9px 11px; }
  .editor-grid, .editor-grid.simple { grid-template-columns: 1fr; }
  .convert-rail, .center-action { min-height: 62px; flex-direction: row; border: 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
  .convert-rail > span { margin: 0 8px 0 0; }
  .editor-pane + .editor-pane { border-left: 0; }
  .code-area { min-height: 220px; }
  .workspace-toolbar { align-items: flex-start; flex-direction: column; }
  .transform-options { grid-template-columns: 1fr; }
  .transform-workspace { min-height: auto; grid-template-columns: 1fr; }
  .text-pane textarea { min-height: 260px; }
  .output-pane { border-top: 1px solid var(--border); border-left: 0; }
  .diff-actions { width: 100%; justify-content: space-between; }
  .diff-editors { grid-template-columns: 1fr; }
  .diff-input-pane + .diff-input-pane { border-left: 0; border-top: 1px solid var(--border); }
  .swap-diff { transform: translate(-50%, -50%); }
  .result-toolbar, .result-toolbar > div { align-items: flex-start; flex-direction: column; gap: 9px; }
  .diff-row { grid-template-columns: 30px minmax(0, 1fr); }
  .diff-row .diff-line-no:nth-child(3), .diff-row .diff-line:nth-child(4) { border-top: 1px solid var(--border); }
  .diff-line.left { border-right: 0; }
  .form-row { grid-template-columns: 1fr; }
  .toast-region { right: 14px; bottom: 14px; left: 14px; }
  .toast { min-width: 0; }
}