:root {
  color-scheme: light;
  --bg: #f7f8f4;
  --surface: #ffffff;
  --surface-soft: #eef3ee;
  --ink: #15171a;
  --muted: #657074;
  --line: #d8dfd8;
  --accent: #0f8b8d;
  --accent-strong: #0a6466;
  --accent-soft: #d9f0ef;
  --rose: #f45b69;
  --gold: #f5b841;
  --success: #25784a;
  --danger: #b4232a;
  --code-bg: #111317;
  --code-line: #293039;
  --code-text: #eef4f6;
  --shadow: 0 20px 60px rgba(17, 19, 23, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(15, 139, 141, 0.08), transparent 330px),
    var(--bg);
}

button,
textarea,
input {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header,
.site-footer,
main {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 0 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
  font-size: 1.1rem;
}

.brand img {
  flex: 0 0 auto;
  border-radius: 8px;
}

.main-nav,
.site-footer nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.main-nav a,
.site-footer a,
.text-link {
  border-radius: 8px;
  color: var(--muted);
  font-weight: 700;
  padding: 9px 12px;
}

.main-nav a:hover,
.main-nav a.active,
.site-footer a:hover,
.text-link:hover {
  background: var(--surface-soft);
  color: var(--ink);
}

.tool-hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 22px;
  padding: 34px 0 20px;
}

.hero-copy {
  max-width: 680px;
  color: #3d474b;
  font-size: 1.05rem;
  line-height: 1.7;
  margin: 14px 0 0;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 0.79rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 8px;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(2rem, 6vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: 0;
  margin-bottom: 0;
}

h2 {
  font-size: 1rem;
  line-height: 1.2;
  margin-bottom: 4px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

.panel {
  display: flex;
  min-width: 0;
  min-height: 640px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-bar {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 16px;
}

.meta {
  min-height: 18px;
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0;
}

textarea {
  width: 100%;
  min-height: 468px;
  flex: 1 1 auto;
  border: 0;
  outline: 0;
  resize: vertical;
  padding: 18px;
  color: var(--ink);
  background: #fbfcfa;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.94rem;
  line-height: 1.58;
  tab-size: 2;
}

button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  cursor: pointer;
  font-weight: 800;
  line-height: 1;
  padding: 10px 13px;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
  white-space: nowrap;
}

button span[aria-hidden="true"] {
  display: inline-grid;
  min-width: 24px;
  min-height: 22px;
  place-items: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.16);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.75rem;
}

button:hover {
  transform: translateY(-1px);
}

button:focus-visible,
a:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(245, 184, 65, 0.65);
  outline-offset: 2px;
}

button.secondary,
.ghost-button {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

button.secondary:hover,
.ghost-button:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding: 12px;
}

.result-panel {
  background: var(--code-bg);
  border-color: #20242b;
  color: var(--code-text);
}

.result-panel .panel-bar,
.result-panel .button-row {
  border-color: #272e36;
}

.result-panel .meta {
  color: #a8b5bc;
}

.result-panel button {
  background: var(--accent);
}

.result-panel button:hover {
  background: var(--accent-strong);
}

.segmented {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(70px, 1fr));
  gap: 4px;
  border: 1px solid #303842;
  border-radius: 8px;
  background: #191d23;
  padding: 4px;
}

.segmented button {
  min-height: 34px;
  border-radius: 6px;
  background: transparent;
  color: #b9c6ce;
  padding: 8px 12px;
}

.segmented button.active {
  background: #eef4f6;
  color: var(--ink);
}

.result-view {
  display: none;
  min-height: 468px;
  flex: 1 1 auto;
}

.result-view.active {
  display: flex;
}

.code-output,
.tree-output {
  width: 100%;
  min-height: 468px;
  max-height: 640px;
  margin: 0;
  overflow: auto;
  border: 0;
  background:
    linear-gradient(var(--code-line) 1px, transparent 1px) 0 0 / 100% 32px,
    var(--code-bg);
  color: var(--code-text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.72;
  padding: 18px;
  tab-size: 2;
  white-space: pre;
}

.tree-output {
  white-space: normal;
}

.tree-output details {
  margin-left: 14px;
}

.tree-output summary {
  cursor: pointer;
  min-height: 28px;
}

.tree-key {
  color: #93d7db;
}

.tree-type {
  color: #f5b841;
}

.tree-value {
  color: #f7a4ad;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid #272e36;
  background: #272e36;
}

.metric {
  min-width: 0;
  background: #15191f;
  padding: 12px;
}

.metric b {
  display: block;
  overflow: hidden;
  color: #ffffff;
  font-size: 1rem;
  text-overflow: ellipsis;
}

.metric span {
  display: block;
  color: #a8b5bc;
  font-size: 0.78rem;
  font-weight: 700;
  margin-top: 4px;
}

.status-ok {
  color: #9fe3bd !important;
}

.status-error {
  color: #ffb3b8 !important;
}

.token-key {
  color: #93d7db;
}

.token-string {
  color: #f7a4ad;
}

.token-number {
  color: #f5b841;
}

.token-boolean,
.token-null {
  color: #8dd7a9;
}

.token-tag {
  color: #93d7db;
}

.token-attribute {
  color: #f5b841;
}

.token-comment {
  color: #8d9aa3;
}

.tool-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 18px 0 40px;
}

.tool-strip a,
.tool-strip > span {
  display: grid;
  min-height: 84px;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.75);
  padding: 16px;
}

.tool-strip span span,
.tool-strip a span {
  font-weight: 800;
}

.tool-strip small {
  color: var(--muted);
  font-weight: 700;
  margin-top: 6px;
}

.content-band {
  display: grid;
  grid-template-columns: 0.8fr 1.6fr;
  gap: 28px;
  border-top: 1px solid var(--line);
  padding: 42px 0 52px;
}

.content-band h2 {
  font-size: clamp(1.55rem, 4vw, 2.6rem);
  line-height: 1.05;
  margin: 0;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.content-grid article {
  min-width: 0;
}

.content-grid h3 {
  font-size: 1rem;
  line-height: 1.25;
  margin: 0 0 10px;
}

.content-grid p {
  color: #3d474b;
  line-height: 1.72;
  margin: 0;
}

.document-page {
  width: min(820px, calc(100% - 32px));
  min-height: 60vh;
  padding: 48px 0 72px;
}

.document-page h1 {
  font-size: clamp(2rem, 8vw, 3.8rem);
  margin-bottom: 20px;
}

.document-page p {
  color: #3d474b;
  font-size: 1.04rem;
  line-height: 1.8;
}

.document-page a {
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.document-page h2 {
  font-size: 1.25rem;
  margin: 28px 0 10px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
  padding: 24px 0 34px;
}

.footer-signature {
  display: flex;
  min-width: 0;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.footer-signature strong {
  color: var(--ink);
  font-weight: 800;
}

.footer-signature a {
  color: var(--accent-strong);
  font-weight: 800;
}

.footer-signature a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (max-width: 900px) {
  .tool-hero {
    align-items: flex-start;
    flex-direction: column;
  }

  .workspace,
  .tool-strip,
  .content-band,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: 520px;
  }

  textarea,
  .result-view,
  .code-output,
  .tree-output {
    min-height: 360px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .panel-bar {
    align-items: flex-start;
    flex-direction: column;
  }

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

  button {
    flex: 1 1 auto;
  }
}