:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-2: #eef3f8;
  --text: #16202a;
  --muted: #667485;
  --border: #dbe3ec;
  --accent: #087f8c;
  --accent-strong: #005f73;
  --accent-soft: #d7f3f5;
  --ok: #168a4a;
  --warn: #bf6b04;
  --danger: #c92a2a;
  --added: #e4f8e9;
  --removed: #ffe8e8;
  --changed: #fff3bf;
  --shadow: 0 18px 50px rgba(22, 32, 42, 0.08);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101418;
  --surface: #171d23;
  --surface-2: #202830;
  --text: #edf2f7;
  --muted: #9aa8b6;
  --border: #2d3945;
  --accent: #35b7c7;
  --accent-strong: #6ed6e0;
  --accent-soft: #12353b;
  --ok: #57c986;
  --warn: #f3b75b;
  --danger: #ff7a7a;
  --added: #123b24;
  --removed: #421c1c;
  --changed: #3d3515;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

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

button,
.file-button {
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  padding: 8px 12px;
  transition:
    border-color 0.16s ease,
    background 0.16s ease,
    color 0.16s ease,
    transform 0.16s ease;
}

button:hover,
.file-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

button:active {
  transform: translateY(1px);
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  outline: none;
}

textarea:focus,
input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea,
pre {
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 68px;
  padding: 12px clamp(16px, 4vw, 48px);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  flex: 1;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
}

.nav-link {
  flex: 0 0 auto;
  border-radius: 8px;
  color: var(--muted);
  padding: 9px 12px;
  text-decoration: none;
}

.nav-link.active,
.nav-link:hover {
  background: var(--surface-2);
  color: var(--text);
}

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

main {
  width: min(1500px, 100%);
  margin: 0 auto;
  padding: 28px clamp(14px, 3vw, 34px) 48px;
}

.route {
  display: none;
}

.route.active {
  display: block;
}

.hero,
.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.hero h1,
.page-heading h1 {
  max-width: 760px;
  margin: 8px 0 12px;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.eyebrow {
  margin: 0;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.trust-strip span {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  padding: 8px 12px;
  white-space: nowrap;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 16px;
}

.panel,
.side-panel,
.editor-zone,
.result-panel,
.diff-result {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.side-panel {
  align-self: start;
  padding: 16px;
}

.side-panel h2,
.panel h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.field {
  display: grid;
  gap: 7px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.field input,
.field select {
  height: 40px;
  padding: 0 11px;
}

.grow {
  flex: 1;
  margin: 0;
}

.file-row,
.action-row,
.query-row,
.output-head,
.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.file-row {
  margin-top: 14px;
}

.file-button {
  position: relative;
  display: inline-grid;
  flex: 1;
  place-items: center;
  overflow: hidden;
  text-align: center;
}

.file-button input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.status {
  margin: 14px 0 20px;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--muted);
  padding: 12px;
  font-size: 13px;
}

.status.ok {
  border-color: var(--ok);
}

.status.error {
  border-color: var(--danger);
  color: var(--danger);
}

.history-list {
  display: grid;
  gap: 8px;
  max-height: 260px;
  overflow: auto;
}

.history-item {
  display: grid;
  gap: 4px;
  width: 100%;
  text-align: left;
}

.history-item small {
  color: var(--muted);
}

.editor-zone {
  min-width: 0;
  overflow: hidden;
}

.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.tabs {
  display: flex;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  padding: 4px;
}

.tab {
  min-height: 32px;
  border: 0;
  background: transparent;
  padding: 5px 11px;
}

.tab.active {
  background: var(--surface);
  color: var(--accent-strong);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08);
}

.drop-zone {
  padding: 12px;
}

.drop-zone.dragging textarea {
  border-color: var(--accent);
  background: var(--accent-soft);
}

#jsonInput,
.split-workspace textarea,
.converter-grid textarea {
  min-height: 380px;
  resize: vertical;
  padding: 14px;
}

.query-row {
  padding: 0 12px 12px;
}

.result-panel {
  min-height: 280px;
  margin: 0 12px 12px;
  overflow: auto;
  box-shadow: none;
}

.view-output {
  display: none;
  min-height: 280px;
  margin: 0;
  padding: 16px;
  white-space: pre-wrap;
}

.view-output.active {
  display: block;
}

.tree-output {
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
}

.tree-node {
  margin-left: 18px;
}

.tree-key {
  color: var(--accent-strong);
  cursor: pointer;
  font-weight: 700;
}

.tree-leaf {
  color: var(--muted);
}

.table-output {
  padding: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
}

.split-workspace,
.converter-grid,
.docs-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.action-row {
  margin: 14px 0;
}

.diff-result {
  min-height: 220px;
  padding: 14px;
  overflow: auto;
  box-shadow: none;
}

.diff-line {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: 12px;
  border-radius: 6px;
  padding: 6px 8px;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
}

.diff-line.added {
  background: var(--added);
}

.diff-line.removed {
  background: var(--removed);
}

.diff-line.changed {
  background: var(--changed);
}

.panel {
  min-width: 0;
  padding: 16px;
}

.converter-grid pre,
#codeOutput,
#convertOutput {
  min-height: 430px;
  margin: 0;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  padding: 14px;
  white-space: pre-wrap;
}

.output-head {
  justify-content: space-between;
  margin-bottom: 12px;
}

.docs-grid article {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 18px;
}

.friend-links {
  margin-top: 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 16px;
}

.friend-links h2 {
  margin: 0 0 12px;
  font-size: 16px;
}

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

.friend-link-grid a {
  display: grid;
  gap: 4px;
  min-height: 72px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text);
  padding: 12px;
  text-decoration: none;
}

.friend-link-grid a:hover {
  border-color: var(--accent);
}

.friend-link-grid span {
  color: var(--muted);
  font-size: 13px;
  word-break: break-all;
}

.docs-grid h2 {
  margin: 0 0 10px;
}

.docs-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  max-width: min(360px, calc(100vw - 36px));
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  padding: 12px 14px;
  transform: translateY(10px);
  transition:
    opacity 0.18s ease,
    transform 0.18s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .topbar {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
  }

  .hero,
  .page-heading,
  .workspace,
  .split-workspace,
  .converter-grid,
  .docs-grid,
  .friend-link-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .trust-strip {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  main {
    padding-inline: 10px;
  }

  .hero h1,
  .page-heading h1 {
    font-size: 34px;
  }

  .editor-toolbar,
  .query-row,
  .file-row,
  .action-row {
    align-items: stretch;
    flex-direction: column;
  }

  .tabs,
  .toolbar-actions,
  .file-row button,
  .file-button {
    width: 100%;
  }

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