:root{
  --bg:#0b0b0f;
  --panel:#14151b;
  --panel2:#101118;
  --text:#e9edf6;
  --muted:#a0a7b4;
  --line:#2a2f3a;
  --accent:#00ffd0;
  --warn:#ff8a00;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:13px/1.35 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  overflow:hidden;
}

header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 14px;
  border-bottom:1px solid var(--line);
  background:var(--panel2);
}
.brand{font-weight:900; letter-spacing:.4px}
.status{color:var(--muted); font-weight:700}

.layout{
  display:grid;
  grid-template-columns: 420px 1fr 520px;
  height:calc(100% - 44px);
}

.panel{
  background:var(--panel);
  border-right:1px solid var(--line);
  overflow:auto;
  padding:12px;
}
.panel.right{
  border-right:none;
  border-left:1px solid var(--line);
}

section{padding:10px 0; border-bottom:1px solid rgba(255,255,255,.04)}
h3{
  margin:0 0 8px 0;
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:.8px;
  color:var(--accent);
}

label{display:block; margin:8px 0 4px 0; color:var(--muted)}
input,select{
  width:100%;
  padding:8px 9px;
  background:#0f1118;
  border:1px solid var(--line);
  color:var(--text);
  border-radius:8px;
}
input[readonly]{opacity:.9}

.grid2{display:grid; grid-template-columns:1fr 1fr; gap:10px}
.row{display:flex; gap:10px; margin-top:8px}
.row .btn{flex:1}

.btn{
  border:none;
  border-radius:10px;
  padding:10px 10px;
  font-weight:900;
  cursor:pointer;
  background:var(--warn);
  color:#111;
}
.btn.ghost{
  background:transparent;
  color:var(--text);
  border:1px solid var(--line);
}
.btn:active{transform:translateY(1px)}
.hint{color:var(--muted); font-size:12px; margin-top:8px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

.drop{
  border:2px dashed var(--line);
  border-radius:12px;
  padding:12px;
  text-align:center;
  background:#0f1220;
  cursor:pointer;
  user-select:none;
}
.drop span{color:var(--muted)}
.drop.drag{border-color:var(--accent); box-shadow:0 0 0 2px rgba(0,255,208,.12) inset}

.readout{
  margin-top:8px;
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#0f1118;
  color:#cfe4ff;
}

.viewer{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:stretch;
  justify-content:stretch;
  overflow:hidden;
}
.canvas-container{
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:auto;
  padding:10px;
}

canvas{
  border:1px solid #222;
  image-rendering:pixelated;
  background:#000;
}
.bar{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  background:var(--panel2);
  border-top:1px solid var(--line);
}
.chip{
  padding:6px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--accent);
  font-weight:900;
  background:#0c0d12;
  white-space:nowrap;
}
.spacer{flex:1}
.hidden{display:none !important}

.tableWrap{overflow:auto; border:1px solid var(--line); border-radius:12px}
table{width:100%; border-collapse:collapse}
th{
  position:sticky;
  top:0;
  background:#151824;
  color:var(--muted);
  text-align:left;
  font-size:12px;
  padding:9px 10px;
}
td{
  padding:8px 10px;
  border-top:1px solid rgba(255,255,255,.06);
  color:#d7dcef;
}
tr:hover{background:rgba(0,255,208,.06)}
tr.sel{outline:2px solid rgba(0,255,208,.28); background:rgba(0,255,208,.08)}
.empty{color:var(--muted); text-align:center}

.tabs{display:flex; gap:10px; margin:6px 0 10px 0}
.tab{
  flex:1;
  padding:8px 10px;
  border-radius:999px;
  background:transparent;
  border:1px solid var(--line);
  color:var(--text);
  font-weight:900;
  cursor:pointer;
}
.tab.active{border-color:rgba(0,255,208,.6); color:var(--accent)}
.mini th{position:static}
.mini td,.mini th{padding:7px 8px}


.wisea{
  margin-top:10px;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#0f1118;
  color:#d7dcef;
  overflow:auto;
  max-height:280px;
  white-space:pre;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;
}


.topnav{display:flex; align-items:center; gap:10px}
.topnav a{
  color:var(--accent);
  text-decoration:none;
  font-weight:900;
  border:1px solid rgba(0,255,208,.25);
  padding:6px 10px;
  border-radius:999px;
}
.topnav a:hover{background:rgba(0,255,208,.08)}


/* Tutorial layout */
.tutWrap{
  height:calc(100% - 44px);
  display:grid;
  grid-template-columns: 280px 1fr;
}
.toc{
  background:var(--panel);
  border-right:1px solid var(--line);
  padding:14px;
  overflow:auto;
}
.tocTitle{
  font-weight:900;
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:.8px;
  font-size:11px;
  margin-bottom:10px;
}
.toc a{
  display:block;
  padding:8px 10px;
  border-radius:10px;
  color:var(--text);
  text-decoration:none;
  border:1px solid transparent;
  margin-bottom:8px;
}
.toc a:hover{background:rgba(0,255,208,.06)}
.toc a.active{border-color:rgba(0,255,208,.5); color:var(--accent)}
.tut{
  padding:18px 18px 80px 18px;
  overflow:auto;
}
.tut h1{margin:0 0 10px 0}
.tut h2{margin:26px 0 10px 0; color:var(--accent)}
.tut p{color:#d7dcef}
.card{
  border:1px solid var(--line);
  background:#0f1118;
  border-radius:14px;
  padding:12px 14px;
  margin:12px 0;
}
.formula{
  background:#0c0d12;
  border:1px solid rgba(255,255,255,.08);
  border-radius:12px;
  padding:10px 12px;
  overflow:auto;
  white-space:pre-wrap;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;
}