:root {
  --bg: #f3f6f4;
  --surface: #ffffff;
  --surface-2: #f8faf9;
  --text: #15221a;
  --muted: #69776e;
  --border: #dce6df;
  --accent: #14833b;
  --accent-dark: #0f6b30;
  --accent-soft: #eef9f1;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(20, 39, 28, 0.065);
  --radius: 15px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin:0; min-height:100%; background:var(--bg); color:var(--text); font-family:var(--sans); }
a { color:inherit; }
button, select, textarea, input { font:inherit; }
button { cursor:pointer; }

.app-shell { width:min(1500px, calc(100% - 32px)); margin:0 auto; padding:22px 0 20px; }
.topbar { display:flex; align-items:center; justify-content:space-between; gap:20px; margin-bottom:16px; }
.brand-row { display:flex; align-items:center; gap:14px; }
.brand-link { color:inherit; text-decoration:none; }
.brand-mark { width:46px; height:46px; border-radius:13px; display:grid; place-items:center; background:linear-gradient(145deg,#11813b,#24b75b); color:#fff; font-family:var(--mono); font-weight:900; box-shadow:0 10px 24px rgba(20,131,59,.18); }
h1 { margin:0; font-size:1.42rem; letter-spacing:-.025em; }
.topbar p { margin:4px 0 0; color:var(--muted); font-size:.88rem; }
.workspace-actions { display:flex; align-items:center; gap:9px; }
.nav-link { color:var(--muted); text-decoration:none; font-size:.84rem; font-weight:700; padding:7px 9px; border-radius:8px; }
.nav-link:hover { color:var(--text); background:#eaf0ec; }
.nav-link.support-nav-link {
  color:var(--accent-dark);
  background:var(--accent-soft);
  border:1px solid #b9dfc5;
  padding:7px 11px;
  font-weight:800;
}
.nav-link.support-nav-link:hover { color:#0b5d29; background:#e2f5e8; border-color:#9ed2ae; }

.workspace-intro { display:flex; align-items:flex-end; justify-content:space-between; gap:20px; margin:6px 2px 15px; }
.workspace-kicker { color:var(--accent); font-size:.7rem; letter-spacing:.12em; font-weight:900; }
.workspace-intro h2 { margin:6px 0 0; font-size:1.18rem; letter-spacing:-.02em; }
.local-pill { display:inline-flex; align-items:center; gap:8px; color:#4f6657; font-size:.78rem; font-weight:800; padding:7px 10px; background:#eaf7ee; border:1px solid #cae8d3; border-radius:999px; white-space:nowrap; }
.local-dot { width:7px; height:7px; border-radius:50%; background:#20aa54; box-shadow:0 0 0 4px rgba(32,170,84,.09); }

.card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow); }
.toolbar { display:flex; align-items:center; justify-content:space-between; gap:14px; padding:12px; margin-bottom:12px; flex-wrap:wrap; }
.toolbar-group { display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
.options { color:var(--muted); font-size:.86rem; }
.options label { display:flex; align-items:center; gap:7px; }
select { border:1px solid var(--border); background:#fff; border-radius:8px; padding:8px 10px; color:var(--text); }
.btn, .mini-btn { border:1px solid var(--border); background:#fff; color:var(--text); border-radius:9px; padding:9px 12px; transition:.15s ease; }
.btn:hover, .mini-btn:hover { border-color:#b4c8ba; transform:translateY(-1px); }
.btn.primary { background:var(--accent); color:#fff; border-color:var(--accent); font-weight:800; box-shadow:0 6px 16px rgba(20,131,59,.14); }
.btn.primary:hover { background:var(--accent-dark); }
.btn.ghost { background:transparent; }
.btn.danger { color:var(--danger); }
.mini-btn { padding:6px 9px; font-size:.8rem; }
.mini-btn.active { color:var(--accent); border-color:#9fceb0; background:var(--accent-soft); font-weight:800; }
.badge { display:inline-flex; align-items:center; gap:6px; padding:7px 10px; border-radius:999px; font-size:.8rem; font-weight:800; }
.badge.neutral { background:#eaf0ec; color:#536159; }
.badge.good { background:#eaf7ee; color:#13723a; }
.badge.bad { background:#fff0ef; color:#a2251b; }
.message { margin:0 0 12px; padding:11px 14px; border-radius:10px; border:1px solid var(--border); background:#fff; font-size:.88rem; }
.message.error { border-color:#f0b7b1; background:#fff6f5; color:#912018; }
.message.success { border-color:#b7dec2; background:#f2fbf4; color:#176b35; }
.hidden { display:none !important; }

.editor-grid { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.editor-card { min-width:0; overflow:hidden; }
.output-card { border-color:#d2e3d7; }
.editor-head { height:56px; display:flex; align-items:center; justify-content:space-between; padding:0 14px; border-bottom:1px solid var(--border); background:linear-gradient(180deg,#fbfcfb,#f6f9f7); }
.editor-head h2 { margin:0; font-size:.95rem; letter-spacing:-.01em; }
.stats { color:var(--muted); font-size:.74rem; display:block; margin-top:3px; }
.output-tabs { display:flex; gap:6px; }
.editor-wrap { display:grid; grid-template-columns:54px 1fr; height:61vh; min-height:470px; background:#fff; overflow:hidden; }
.line-numbers { margin:0; padding:14px 10px; overflow:hidden; background:#f7faf8; color:#a0aaa4; border-right:1px solid var(--border); text-align:right; user-select:none; font-family:var(--mono); font-size:13px; line-height:1.55; }
textarea { width:100%; height:100%; border:0; outline:0; resize:none; padding:14px 16px; color:#17251c; background:#fff; font-family:var(--mono); font-size:13px; line-height:1.55; tab-size:4; white-space:pre; overflow:auto; }
textarea:focus { box-shadow:inset 0 0 0 2px rgba(20,131,59,.07); }
textarea::placeholder { color:#a3ada7; }
.output-wrap textarea { color:#173b25; background:#fcfefd; }
.tree-view { height:61vh; min-height:470px; overflow:auto; padding:16px 18px; background:#fcfefd; font-family:var(--mono); font-size:13px; line-height:1.55; }
.tree-node { margin-left:18px; }
.tree-row { white-space:nowrap; }
.tree-key { color:#7a3e9d; }
.tree-string { color:#0f6b30; }
.tree-number { color:#2158a8; }
.tree-boolean { color:#a15c00; }
.tree-null { color:#8a4b52; }
details > summary { cursor:pointer; list-style:none; }
details > summary::-webkit-details-marker { display:none; }
details > summary::before { content:'▸'; display:inline-block; width:14px; color:#7b897f; }
details[open] > summary::before { content:'▾'; }

.info-strip { margin-top:12px; display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; padding:11px 14px; color:var(--muted); font-size:.8rem; }
footer { display:flex; justify-content:space-between; align-items:flex-end; gap:20px; color:#7e8e84; font-size:.76rem; padding:15px 4px 0; }
.footer-left { display:flex; flex-direction:column; gap:4px; }
.footer-left a { color:var(--accent-dark); text-decoration:none; font-weight:800; }
.footer-left a:hover { text-decoration:underline; }
.footer-release { text-align:right; white-space:nowrap; }

@media (max-width: 980px) {
  .editor-grid { grid-template-columns:1fr; }
  .editor-wrap, .tree-view { height:45vh; min-height:350px; }
}
@media (max-width: 680px) {
  .app-shell { width:min(100% - 18px,1500px); padding-top:12px; }
  .topbar { align-items:flex-start; }
  .workspace-actions .nav-link { display:none; }
  .workspace-actions .support-nav-link { display:inline-flex; white-space:nowrap; }
  .topbar p { max-width:280px; }
  .workspace-intro { align-items:flex-start; flex-direction:column; gap:9px; }
  .toolbar { align-items:flex-start; }
  .toolbar-group { width:100%; }
  .btn { flex:1 1 auto; }
  .options { justify-content:space-between; }
  .editor-wrap { grid-template-columns:42px 1fr; }
  footer { flex-direction:column; align-items:flex-start; gap:8px; }
  .footer-release { text-align:left; white-space:normal; }
}