:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --surface-muted: #f7f8fc;
  --text: #172033;
  --muted: #697386;
  --border: #dfe4ee;
  --accent: #4f46e5;
  --accent-soft: #eeecff;
  --success: #07885f;
  --success-soft: #e8f8f2;
  --danger: #c43d4d;
  --danger-soft: #fff0f2;
  --warning: #a06400;
  --shadow: 0 18px 50px rgba(35, 45, 75, 0.08);
  --radius: 18px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0c111b;
  --surface: rgba(20, 27, 40, 0.94);
  --surface-strong: #151c29;
  --surface-muted: #111824;
  --text: #ecf1fb;
  --muted: #9da9bc;
  --border: #2b3547;
  --accent: #8c83ff;
  --accent-soft: #272344;
  --success: #4ed6a4;
  --success-soft: #17352d;
  --danger: #ff8290;
  --danger-soft: #3b2027;
  --warning: #f6bf55;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(79, 70, 229, 0.12), transparent 30%),
    radial-gradient(circle at 90% 12%, rgba(25, 148, 255, 0.1), transparent 26%),
    var(--bg);
}

button, input, textarea, select { font: inherit; }
button, select, .file-button { -webkit-tap-highlight-color: transparent; }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, .file-button:focus-within {
  outline: 3px solid color-mix(in srgb, var(--accent) 28%, transparent);
  outline-offset: 2px;
}

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 72px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 75%, transparent);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(145deg, var(--accent), #2a9cfa); color: white; font-weight: 800; letter-spacing: -0.04em;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.24);
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: 15px; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 11px; }

.topbar-actions { display: flex; align-items: center; gap: 12px; }
.privacy-badge { color: var(--success); background: var(--success-soft); padding: 7px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.icon-button { width: 38px; height: 38px; border-radius: 11px; border: 1px solid var(--border); background: var(--surface-strong); color: var(--text); cursor: pointer; }

.workspace { width: min(1500px, calc(100% - 40px)); margin: 18px auto 36px; flex: 1; }


.toolbar {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  margin: 18px 0;
  padding: 12px;
  border: 1px solid var(--border); border-radius: 15px; background: var(--surface); box-shadow: 0 10px 30px rgba(40, 50, 80, .05);
}
.toolbar-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.toolbar button, .toolbar select, .file-button {
  min-height: 38px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: 10px; padding: 0 13px;
  background: var(--surface-strong); color: var(--text); cursor: pointer; font-size: 13px; font-weight: 650;
}
.format-selector {
  min-height: 38px; display: inline-flex; align-items: center; overflow: hidden;
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface-strong);
}
.format-selector > span {
  align-self: stretch; display: inline-flex; align-items: center; padding: 0 9px;
  border-right: 1px solid var(--border); color: var(--muted); background: var(--surface-muted);
  font-size: 11px; font-weight: 750;
}
.format-selector select {
  min-height: 36px; border: 0; border-radius: 0; padding: 0 28px 0 10px; background: transparent;
}
.format-selector:focus-within { border-color: color-mix(in srgb, var(--accent) 48%, var(--border)); }
.format-badge.manual { background: var(--success-soft); color: var(--success); }
.toolbar button:hover, .toolbar select:hover, .file-button:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.toolbar .primary-button { background: var(--accent); border-color: var(--accent); color: white; }

.editor-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
.panel { min-width: 0; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; box-shadow: var(--shadow); }
.panel-header { height: 58px; padding: 0 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.panel-title-wrap { display: flex; align-items: center; gap: 9px; }
.panel h2 { margin: 0; font-size: 14px; }
.format-badge { padding: 5px 8px; border-radius: 7px; background: var(--accent-soft); color: var(--accent); font: 800 11px var(--mono); }
.editor-meta { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 11px; }
.text-button { border: 0; background: transparent; color: var(--accent); cursor: pointer; padding: 4px; }

.editor-body {
  display: grid; grid-template-columns: auto minmax(0, 1fr);
  height: 560px; min-height: 360px; resize: vertical; overflow: hidden;
  background: var(--surface-muted);
}
.line-numbers {
  width: 56px; height: 100%; margin: 0; padding: 20px 12px 20px 0;
  overflow: hidden; user-select: none; text-align: right;
  border-right: 1px solid color-mix(in srgb, var(--border) 78%, transparent);
  background: color-mix(in srgb, var(--surface-strong) 58%, var(--surface-muted));
  color: color-mix(in srgb, var(--muted) 82%, transparent);
  font: 12px/22px var(--mono); white-space: pre;
}
#editor {
  display: block; width: 100%; height: 100%; min-height: 0; resize: none; border: 0; outline: 0;
  padding: 20px; background: transparent; color: var(--text);
  font: 13px/22px var(--mono); tab-size: 2; white-space: pre;
}
.drop-hint { display: none; }
.editor-layout.dragging .editor-panel { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent), var(--shadow); }
.editor-layout.dragging .drop-hint {
  display: grid; place-items: center; position: absolute; inset: 58px 0 0; z-index: 3;
  background: color-mix(in srgb, var(--accent-soft) 92%, transparent); color: var(--accent); font-weight: 800;
}
.editor-panel { position: relative; }

.preview-header { padding-right: 12px; }
.tabs { display: flex; align-self: stretch; }
.preview-actions { display: flex; align-items: center; gap: 8px; min-width: 0; }
.tree-actions { display: flex; gap: 5px; }
.tree-actions button {
  height: 30px; padding: 0 9px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface-strong); color: var(--muted); cursor: pointer; font-size: 11px; font-weight: 700;
}
.tree-actions button:hover { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 38%, var(--border)); }
.tab { border: 0; border-bottom: 2px solid transparent; padding: 0 14px; background: transparent; color: var(--muted); cursor: pointer; font-size: 13px; font-weight: 750; }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.search-box { display: flex; align-items: center; min-width: 170px; border: 1px solid var(--border); border-radius: 9px; padding: 0 9px; background: var(--surface-strong); }
.search-box input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 12px; padding: 8px 0; }
.search-box span { color: var(--muted); font: 700 10px var(--mono); }
.preview-content { min-height: 560px; max-height: 720px; overflow: auto; padding: 18px; background: linear-gradient(180deg, color-mix(in srgb, var(--surface-muted) 92%, white 8%), var(--surface-muted)); }
.empty-state { min-height: 500px; display: grid; place-items: center; text-align: center; color: var(--muted); }
.empty-state strong { display: block; color: var(--text); margin-bottom: 8px; }

.tree-root, .tree-root ul { list-style: none; margin: 0; padding-left: 19px; }
.tree-root { padding-left: 0; font: 12px/1.75 var(--mono); }
.tree-root ul { margin-left: 8px; border-left: 1px dashed color-mix(in srgb, var(--border) 78%, transparent); }
.tree-row {
  display: inline-flex; align-items: center; gap: 6px; min-width: max-content;
  padding: 3px 9px 3px 0; border-radius: 10px; position: relative;
}
.tree-row:hover { background: color-mix(in srgb, var(--accent-soft) 62%, transparent); }
.tree-toggle {
  width: 18px; height: 20px; padding: 0; border: 0; background: transparent;
  color: var(--muted); cursor: pointer; font-size: 10px;
}
.tree-toggle.placeholder { visibility: hidden; }
.tree-key {
  color: #7c3aed; font-weight: 700; padding: 2px 6px; border-radius: 999px;
  background: color-mix(in srgb, var(--accent-soft) 76%, transparent);
}
:root[data-theme="dark"] .tree-key { color: #c7bbff; }
.tree-string { color: #07885f; }
:root[data-theme="dark"] .tree-string { color: #67dfb2; }
.tree-number { color: #b45309; }
:root[data-theme="dark"] .tree-number { color: #f6bd60; }
.tree-boolean, .tree-null { color: #c2415d; }
.tree-meta {
  color: var(--muted); padding: 2px 8px; border-radius: 999px;
  background: color-mix(in srgb, var(--surface-strong) 84%, transparent);
  border: 1px solid color-mix(in srgb, var(--border) 72%, transparent);
  font-size: 10px; letter-spacing: .01em;
}
.tree-type-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); opacity: .72; }
.tree-hidden { display: none; }

.data-table { width: 100%; border-collapse: separate; border-spacing: 0; font: 12px/1.5 var(--mono); }
.data-table th, .data-table td { padding: 10px 11px; text-align: left; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); vertical-align: top; max-width: 340px; overflow-wrap: anywhere; }
.data-table th { position: sticky; top: -18px; z-index: 2; background: var(--surface-strong); color: var(--text); }
.data-table tr:first-child th { border-top: 1px solid var(--border); }
.data-table th:first-child, .data-table td:first-child { border-left: 1px solid var(--border); }
.data-table tr:first-child th:first-child { border-top-left-radius: 9px; }
.data-table tr:first-child th:last-child { border-top-right-radius: 9px; }
.table-note { margin: 0 0 12px; color: var(--muted); font-size: 12px; }

.raw-code { margin: 0; min-width: max-content; color: var(--text); white-space: pre; font: 12px/1.72 var(--mono); }
.syntax-key { color: #7c3aed; }
.syntax-string { color: #07885f; }
.syntax-number { color: #b45309; }
.syntax-literal { color: #c2415d; }
.syntax-tag { color: #2563eb; }
.syntax-attr { color: #7c3aed; }
.syntax-comment { color: var(--muted); }
mark { padding: 0 1px; border-radius: 3px; background: #ffe28a; color: #2c2300; }

.status-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 18px; }
.status-card { padding: 18px; border: 1px solid var(--border); border-radius: 15px; background: var(--surface); }
.status-label { display: block; margin-bottom: 10px; color: var(--muted); font-size: 11px; font-weight: 750; text-transform: uppercase; letter-spacing: .08em; }
.status-value { display: block; font-size: 17px; }
.status-value.success { color: var(--success); }
.status-value.error { color: var(--danger); }
.status-value.neutral { color: var(--muted); }
.status-card p { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.5; }

footer { display: flex; justify-content: space-between; gap: 20px; padding: 24px clamp(20px, 5vw, 72px); border-top: 1px solid var(--border); color: var(--muted); font-size: 11px; }
.toast { position: fixed; left: 50%; bottom: 28px; z-index: 50; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; background: #172033; color: white; padding: 10px 14px; border-radius: 10px; font-size: 12px; box-shadow: 0 14px 40px rgba(0,0,0,.24); transition: .2s ease; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 980px) {
  .editor-layout { grid-template-columns: 1fr; }
  .editor-body, .preview-content { min-height: 420px; }
  .status-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .workspace { width: min(100% - 22px, 1500px); margin-top: 14px; }
  .topbar { padding: 0 12px; }
  .privacy-badge { display: none; }
  .toolbar-group, .toolbar-group-right { width: 100%; }
  .toolbar button, .toolbar select, .file-button { flex: 1 1 auto; }
  .format-selector { flex: 1 1 auto; }
  .format-selector select { flex: 1; }
  .preview-header { height: auto; min-height: 58px; align-items: stretch; flex-direction: column; padding: 0 12px 10px; }
  .tabs { height: 48px; }
  .preview-actions { width: 100%; }
  .search-box { width: 100%; }
  .tree-actions button { height: 34px; }
  footer { flex-direction: column; }
}