:root{
  --bg:#100f0d;
  --bg-raised:#17150f;
  --panel:#1c1a14;
  --panel-2:#232019;
  --border:#332f24;
  --border-soft:#26231b;
  --text:#ffffff;
  --text-dim:#cccccc;
  --text-faint:#999999;
  --amber:#e8a33d;
  --amber-dim:#a97a34;
  --teal:#5fb99b;
  --red:#d9776f;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Inter', -apple-system, sans-serif;
  --radius: 3px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:14px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--amber);color:#100f0d}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-raised)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px}
::-webkit-scrollbar-thumb:hover{background:var(--amber-dim)}

a{color:var(--amber)}
img, canvas{max-width:100%; height:auto;}

/* ---------- shell layout ---------- */
.shell{
  display:grid;
  grid-template-columns: 268px 1fr;
  min-height:100vh;
}
@media (max-width: 1024px) and (min-width: 861px){
  .shell{grid-template-columns: 224px 1fr}
  .content{padding:24px 26px 56px;}
}

/* ---------- sidebar ---------- */
.sidebar{
  background:var(--bg-raised);
  border-right:1px solid var(--border-soft);
  display:flex;
  flex-direction:column;
  height:100vh;
  position:sticky;
  top:0;
}
.brand{
  padding:18px 16px 12px;
  border-bottom:1px solid var(--border-soft);
  display:flex;
  align-items:baseline;
  gap:8px;
}
@media (max-width: 860px){
  .shell{display:block;}
  .sidebar{position:fixed; z-index:40; top:0; left:0; height:100vh; width:min(280px, 86vw);
    transform:translateX(-100%); transition:transform .18s ease; box-shadow:20px 0 40px rgba(0,0,0,.5);}
  .sidebar.open{transform:translateX(0)}
  .menu-btn{display:inline-flex !important}
  .scrim{display:none; position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:35}
  .scrim.open{display:block}
}
.brand .glyph{color:var(--amber); font-family:var(--mono); font-weight:700; font-size:18px;}
.brand .name{font-family:var(--mono); font-weight:700; font-size:16px; letter-spacing:-0.02em;}
.brand .tag{font-size:10px; color:var(--text-faint); font-family:var(--mono); margin-left:auto;}

.cmdk{
  margin:12px 14px 6px;
  position:relative;
}
.cmdk::before{
  content:':';
  position:absolute; left:10px; top:50%; transform:translateY(-50%);
  color:var(--amber); font-family:var(--mono); font-weight:700; font-size:13px;
}
.cmdk input{
  width:100%;
  background:var(--panel);
  border:1px solid var(--border);
  color:var(--text);
  font-family:var(--mono);
  font-size:12.5px;
  padding:8px 10px 8px 22px;
  border-radius:var(--radius);
  outline:none;
}
.cmdk input:focus{border-color:var(--amber-dim)}
.cmdk input::placeholder{color:var(--text-faint)}

.navwrap{overflow-y:auto; flex:1; padding:6px 8px 16px;}
.navgroup{margin-top:14px;}
.navgroup h4{
  font-family:var(--mono);
  font-size:10.5px;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--text-faint);
  margin:0 8px 4px;
  font-weight:600;
}
.navitem{
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px 8px;
  border-radius:var(--radius);
  color:var(--text-dim);
  cursor:pointer;
  font-size:12.8px;
  font-family:var(--mono);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  text-decoration:none;
}
.navitem:hover{background:var(--panel); color:var(--text);}
.navitem.active{background:var(--panel-2); color:var(--amber); }
.navitem .n{opacity:.45; font-size:11px; width:16px; flex-shrink:0;}
.navitem.hidden{display:none}

.sidebar-foot{
  padding:10px 16px;
  border-top:1px solid var(--border-soft);
  font-size:11px;
  color:var(--text-faint);
  font-family:var(--mono);
}

/* ---------- main ---------- */
.main{min-width:0;}
.topbar{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 16px;
  border-bottom:1px solid var(--border-soft);
  position:sticky; top:0; background:var(--bg); z-index:20;
}
.topbar .brand {
  display:none;
}
@media (max-width:860px){ 
  .topbar .brand { display: inline-flex; }
}
.menu-btn{
  display:none;
  align-items:center; justify-content:center;
  width:32px; height:32px;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--text);
  border-radius:var(--radius);
  cursor:pointer;
}

.content{padding:28px 34px 60px; max-width:1180px;}
@media (max-width:640px){ .content{padding:16px 14px 44px} }
@media (max-width:420px){ .content{padding:14px 12px 40px} }

.tool-head{margin-bottom:18px;}
.crumb{font-family:var(--mono); font-size:11px; color:var(--text-faint); text-transform:uppercase; letter-spacing:.08em;}
.tool-head h1{font-family:var(--mono); font-size:21px; margin:4px 0 6px; font-weight:700; letter-spacing:-0.01em;}
.tool-head p{color:var(--text-dim); font-size:13px; margin:0; max-width:680px;}
@media (max-width:640px){
  .tool-head h1{font-size:18px;}
  .tool-head p{font-size:12.5px;}
}

/* ---------- Pro Upgrade Styles ---------- */
.pro-btn {
  background: linear-gradient(135deg, var(--amber) 0%, #ff8a00 100%);
  color: #100f0d;
  border: none;
  border-radius: var(--radius);
  padding: 10px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  transition: opacity 0.2s, transform 0.1s;
  width: 100%;
}
.pro-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}
.pro-btn:active {
  transform: translateY(0);
}

.modal-scrim {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  z-index: 100; display: none; align-items: center; justify-content: center;
  backdrop-filter: blur(2px);
}
.modal-scrim.open {
  display: flex;
}
.modal-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 90%; max-width: 480px;
  padding: 32px 28px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  animation: modalIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
  position: absolute; right: 16px; top: 16px;
  background: transparent; border: none; color: var(--text-faint);
  cursor: pointer; font-size: 24px; line-height: 1; padding: 4px;
}
.modal-close:hover { color: var(--text); }
.pro-features {
  list-style: none; padding: 0; margin: 24px 0;
}
.pro-features li {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 16px; font-size: 14px;
}
.pro-features li svg { flex-shrink: 0; color: var(--amber); width: 20px; height: 20px; margin-top: 1px;}
/* ---------------------------------------- */

.panel{
  background:var(--panel);
  border:1px solid var(--border-soft);
  border-radius:6px;
  padding:16px;
  margin-bottom:16px;
}
.panel h3{margin:0 0 10px; font-size:12px; font-family:var(--mono); text-transform:uppercase; letter-spacing:.06em; color:var(--text-faint); font-weight:600;}
@media (max-width:640px){ .panel{padding:12px; border-radius:5px;} }

.grid2{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
@media (max-width:760px){ .grid2{grid-template-columns:1fr; gap:12px;} }

textarea, .fake-textarea{
  width:100%;
  background:var(--bg-raised);
  color:var(--text);
  border:1px solid var(--border);
  border-radius:var(--radius);
  font-family:var(--mono);
  font-size:12.5px;
  line-height:1.55;
  padding:10px;
  resize:vertical;
  min-height:220px;
  outline:none;
}
textarea:focus{border-color:var(--amber-dim)}
textarea[readonly]{color:var(--text-dim)}
@media (max-width:640px){ textarea{min-height:160px; font-size:13px;} }

label{display:block; font-size:11.5px; color:var(--text-faint); font-family:var(--mono); margin-bottom:6px; text-transform:uppercase; letter-spacing:.05em;}

input[type=text], input[type=number], input[type=search], select{
  background:var(--bg-raised);
  color:var(--text);
  border:1px solid var(--border);
  border-radius:var(--radius);
  font-family:var(--mono);
  font-size:12.5px;
  padding:8px 10px;
  outline:none;
}
input[type=text]:focus, input[type=number]:focus, select:focus{border-color:var(--amber-dim)}

.btnrow{display:flex; flex-wrap:wrap; gap:8px; margin:10px 0 4px;}
button{
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
  padding:8px 14px;
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:var(--panel-2);
  color:var(--text);
  cursor:pointer;
  transition:border-color .12s, color .12s;
}
button:hover{border-color:var(--amber-dim); color:var(--amber);}
button.primary{background:var(--amber); color:#171308; border-color:var(--amber);}
button.primary:hover{background:#f0ae4d; color:#171308;}
button.ghost{background:transparent;}
button:disabled{opacity:.4; cursor:not-allowed}
@media (max-width:640px){
  button{padding:10px 14px; font-size:12.5px;}
  .btnrow{gap:8px 10px;}
  .btnrow button{flex:1 1 auto;}
}

.field-row{display:flex; gap:10px; flex-wrap:wrap; align-items:end; margin-bottom:12px;}
.field{display:flex; flex-direction:column; gap:0; min-width:0;}
@media (max-width:640px){
  .field-row{flex-direction:column; align-items:stretch; gap:10px;}
  .field-row input[type=text], .field-row input[type=number], .field-row select{width:100% !important;}
  .field-row > button{width:100%;}
}

.badge{
  display:inline-block; font-family:var(--mono); font-size:10.5px; padding:2px 7px;
  border-radius:20px; border:1px solid var(--border); color:var(--text-dim);
}
.badge.ok{color:var(--teal); border-color:var(--teal);}
.badge.err{color:var(--red); border-color:var(--red);}

.msg{font-family:var(--mono); font-size:12px; padding:8px 10px; border-radius:var(--radius); margin-top:8px; display:none;}
.msg.show{display:block;}
.msg.ok{background:rgba(95,185,155,.08); color:var(--teal); border:1px solid rgba(95,185,155,.3);}
.msg.err{background:rgba(217,119,111,.08); color:var(--red); border:1px solid rgba(217,119,111,.3);}

.meta-row{display:flex; justify-content:space-between; align-items:center; margin-top:6px;}
.count{font-family:var(--mono); font-size:11px; color:var(--text-faint);}

table.kv{width:100%; border-collapse:collapse; font-family:var(--mono); font-size:12.5px; table-layout:fixed;}
table.kv th{text-align:left; color:var(--text-faint); font-weight:600; padding:6px 8px; border-bottom:1px solid var(--border-soft); font-size:11px; text-transform:uppercase; letter-spacing:.05em; width:34%;}
table.kv td{padding:7px 8px; border-bottom:1px solid var(--border-soft); word-break:break-all;}
table.kv tr:last-child td{border-bottom:none}
@media (max-width:480px){
  table.kv{font-size:11.5px;}
  table.kv th{width:38%; padding:6px 6px;}
  table.kv td{padding:6px 6px;}
}

.hero{
  padding:26px 0 8px;
}
.hero h1{font-family:var(--mono); font-size:26px; margin:0 0 8px;}
.hero p{color:var(--text-dim); max-width:560px; margin:0 0 18px;}
.hero .stat{font-family:var(--mono); color:var(--amber);}
@media (max-width:640px){
  .hero{padding:10px 0 4px;}
  .hero h1{font-size:21px;}
  .hero p{font-size:13px;}
}

.cards{display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:10px; margin-top:16px;}
.card{
  background:var(--panel); border:1px solid var(--border-soft); border-radius:6px; padding:14px;
  cursor:pointer; display:block; text-decoration:none; color:var(--text);
}
.card:hover{border-color:var(--amber-dim);}
.card .cat{font-family:var(--mono); font-size:10px; color:var(--text-faint); text-transform:uppercase; letter-spacing:.06em;}
.card .t{font-family:var(--mono); font-size:13.5px; margin-top:4px; font-weight:600;}
@media (max-width:480px){
  .cards{grid-template-columns:1fr 1fr; gap:8px;}
  .card{padding:11px;}
}
@media (max-width:360px){
  .cards{grid-template-columns:1fr;}
}

.diffwrap{font-family:var(--mono); font-size:12.5px; white-space:pre-wrap; word-break:break-word; background:var(--bg-raised); border:1px solid var(--border); border-radius:var(--radius); padding:10px; min-height:160px; overflow:auto;}
.diff-add{background:rgba(95,185,155,.18); color:#a9e3cd;}
.diff-del{background:rgba(217,119,111,.18); color:#f0b9b4; text-decoration:line-through;}

.viewport-grid{display:grid; gap:14px; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); margin-top:14px;}
@media (max-width:480px){ .viewport-grid{grid-template-columns:1fr; gap:12px;} }
.viewport-card{border:1px solid var(--border); border-radius:6px; overflow:hidden; background:var(--bg-raised);}
.viewport-card .vp-head{display:flex; justify-content:space-between; padding:6px 10px; font-family:var(--mono); font-size:11px; color:var(--text-faint); border-bottom:1px solid var(--border-soft);}
.viewport-card iframe{width:100%; border:none; display:block; background:#fff;}

.qr-drop{
  border:1.5px dashed var(--border); border-radius:6px; padding:26px; text-align:center;
  color:var(--text-faint); font-family:var(--mono); font-size:12px; cursor:pointer;
}
.qr-drop:hover{border-color:var(--amber-dim); color:var(--text-dim);}

.regex-highlight{white-space:pre-wrap; word-break:break-word; background:var(--bg-raised); border:1px solid var(--border); border-radius:var(--radius); padding:10px; font-family:var(--mono); font-size:12.5px; min-height:120px;}
.regex-highlight mark{background:rgba(232,163,61,.35); color:var(--text); border-radius:2px;}

.footer-note{margin-top:26px; font-size:11.5px; color:var(--text-faint); font-family:var(--mono);}