:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #18202a;
  --muted: #687383;
  --line: #d9e0ea;
  --soft-line: #e9edf3;
  --accent: #2f6fed;
  --accent-hover: #245dce;
  --accent-soft: #eef5ff;
  --teal: #0f766e;
  --shadow: 0 18px 50px rgba(26, 37, 55, 0.1);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

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

body {
  background:
    radial-gradient(circle at top left, rgba(47, 111, 237, 0.09), transparent 34%),
    var(--bg);
  color: var(--ink);
  font: 15px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

h1,
h2,
p {
  margin: 0;
}

.app-shell {
  display: grid;
  gap: 22px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 24px;
}

.tool-header,
.transform-panel,
.editor-panel,
.metric-card {
  border: 1px solid var(--soft-line);
  border-radius: var(--radius);
  background: var(--panel);
}

.tool-header,
.transform-panel,
.editor-panel {
  padding: 24px;
  box-shadow: var(--shadow);
}

.brand-row,
.brand,
.section-heading,
.editor-toolbar,
.editor-footer,
.toolbar-actions {
  display: flex;
  align-items: center;
}

.brand-row,
.section-heading,
.editor-toolbar,
.editor-footer {
  justify-content: space-between;
}

.brand-row,
.section-heading,
.editor-toolbar {
  gap: 18px;
}

.brand {
  min-width: 0;
  gap: 12px;
}

.brand > div {
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #ffffff;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.04em;
  box-shadow: inset 0 -8px 20px rgba(0, 0, 0, 0.12);
}

h1 {
  font-size: 22px;
  line-height: 1.15;
}

h2 {
  font-size: 19px;
  line-height: 1.2;
}

.brand p,
.privacy-note,
.section-heading > span,
.status,
.metric-card span {
  color: var(--muted);
}

.brand p {
  margin-top: 3px;
}

.home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  min-width: 68px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
  text-decoration: none;
}

.home-link:hover,
.home-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.privacy-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: #f7f9fc;
  font-size: 13px;
}

.transform-panel,
.editor-panel {
  display: grid;
  gap: 18px;
}

.eyebrow {
  margin-bottom: 3px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.section-heading > span {
  flex: 0 0 auto;
  font-size: 13px;
}

.transform-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.transform-button {
  display: grid;
  gap: 5px;
  min-width: 0;
  min-height: 86px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.16s ease, background 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.transform-button strong {
  font-size: 14px;
  line-height: 1.25;
}

.transform-button span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
}

.transform-button:hover,
.transform-button:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
  transform: translateY(-1px);
}

.transform-button:hover span,
.transform-button:focus-visible span {
  color: #456a9d;
}

.toolbar-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.secondary-action,
.primary-action {
  height: 40px;
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0 14px;
  font-weight: 780;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.secondary-action {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
}

.secondary-action:hover:not(:disabled),
.secondary-action:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}

.primary-action {
  min-width: 116px;
  border: 0;
  background: var(--accent);
  color: #ffffff;
}

.primary-action:hover:not(:disabled),
.primary-action:focus-visible {
  background: var(--accent-hover);
  outline: none;
  transform: translateY(-1px);
}

.secondary-action:disabled,
.primary-action:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.text-field {
  display: block;
}

textarea {
  display: block;
  width: 100%;
  min-height: 390px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfe;
  color: var(--ink);
  padding: 18px;
  outline: none;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  line-height: 1.65;
  tab-size: 2;
}

textarea:focus {
  border-color: var(--accent);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.14);
}

textarea::placeholder {
  color: #98a3b2;
}

.editor-footer {
  gap: 18px;
}

.status {
  min-width: 0;
  font-size: 13px;
}

.status.is-success {
  color: var(--teal);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric-card {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 18px;
}

.metric-card span {
  font-size: 13px;
}

.metric-card strong {
  overflow: hidden;
  font-size: 24px;
  line-height: 1.1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-footer {
  color: var(--muted);
  font-size: 12px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (max-width: 760px) {
  .app-shell {
    width: min(100% - 28px, 1120px);
    padding-top: 18px;
  }

  .tool-header,
  .transform-panel,
  .editor-panel {
    padding: 18px;
  }

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

  .editor-toolbar,
  .editor-footer {
    align-items: stretch;
    flex-direction: column;
  }

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

  .secondary-action,
  .primary-action {
    width: 100%;
    padding: 0 10px;
  }

  textarea {
    min-height: 330px;
  }

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

@media (max-width: 480px) {
  .brand-row {
    align-items: flex-start;
  }

  .brand p {
    display: none;
  }

  .transform-grid {
    grid-template-columns: 1fr;
  }

  .transform-button {
    min-height: 76px;
  }

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

  #sampleButton {
    grid-column: 1 / -1;
  }
}