:root{
  --bg:#060812;
  --panel:#0b1020;
  --card:#0e1428;
  --border:rgba(255,255,255,.08);
  --text:rgba(255,255,255,.92);
  --muted:rgba(255,255,255,.68);
  --muted2:rgba(255,255,255,.55);
  --shadow:0 18px 45px rgba(0,0,0,.45);

  --primary:#7c5cff;
  --primary2:#16d6ff;
  --danger:#ff4d6d;
  --ok:#31d28b;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(900px 450px at 15% 10%, rgba(124,92,255,.18), transparent 60%),
    radial-gradient(800px 400px at 85% 0%, rgba(22,214,255,.13), transparent 60%),
    var(--bg);
  color:var(--text);
}

a{color:inherit; text-decoration:none}
.wrap{max-width:1100px; margin:0 auto; padding:18px}

.topbar{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(6,8,18,.72);
  border-bottom:1px solid var(--border);
}
.topbar-row{display:flex; align-items:center; justify-content:space-between; gap:16px}
.logo{font-weight:750; letter-spacing:.2px}
.nav{display:flex; gap:14px; align-items:center; flex-wrap:wrap}
.nav a{color:var(--muted); padding:8px 10px; border-radius:10px}
.nav a.active, .nav a:hover{color:var(--text); background:rgba(255,255,255,.06);}

.footer{border-top:1px solid var(--border); margin-top:24px; padding:10px 0; color:var(--muted)}

h1{font-size:34px; margin:0 0 10px}
h2{margin:0}
.lead{color:var(--muted); font-size:16px; line-height:1.55; margin:10px 0 14px}
.small{color:var(--muted2); font-size:13px; line-height:1.45}
.h2{font-size:16px; margin:0 0 10px; color:rgba(255,255,255,.88)}

.card{
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01));
  border:1px solid var(--border);
  border-radius:16px;
  padding:16px;
  box-shadow: var(--shadow);
}

.row{display:flex; align-items:center}
.between{justify-content:space-between}
.gap{gap:10px}
.wrapline{flex-wrap:wrap}

.btn{
  border:1px solid var(--border);
  background: rgba(255,255,255,.04);
  color:var(--text);
  padding:9px 12px;
  border-radius:12px;
  cursor:pointer;
  font-weight:600;
}
.btn:hover{background:rgba(255,255,255,.07)}
.btn.primary{
  border-color: rgba(124,92,255,.55);
  background: linear-gradient(90deg, rgba(124,92,255,.85), rgba(22,214,255,.55));
}
.btn.primary:hover{filter:brightness(1.05)}
.btn.danger{border-color:rgba(255,77,109,.55); background:rgba(255,77,109,.10)}
.btn.danger:hover{background:rgba(255,77,109,.16)}

.badge{
  display:inline-flex; align-items:center;
  border:1px solid var(--border);
  background:rgba(255,255,255,.04);
  padding:6px 10px;
  border-radius:999px;
  color:var(--muted);
  font-weight:650;
  font-size:12px;
}

.hero{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:16px;
  margin-top:8px;
  align-items:stretch;
}
@media (max-width:900px){ .hero{grid-template-columns:1fr} }

.hero-left{padding:20px; border-radius:18px; border:1px solid var(--border); background:rgba(255,255,255,.02)}
.hero-note{margin-top:12px}

.hero-right .statgrid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.stat{padding:14px}
.stat-k{color:var(--muted); font-size:12px}
.stat-v{font-size:26px; font-weight:800; margin-top:6px}

.section{margin-top:18px}
.section-title{display:flex; align-items:flex-end; justify-content:space-between; gap:10px; margin-bottom:10px}

.catgrid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:12px;
}
@media (max-width:900px){ .catgrid{grid-template-columns: repeat(2, 1fr);} }

.cat{
  padding:14px;
  border-radius:16px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.02);
  cursor:pointer;
}
.cat:hover{background:rgba(255,255,255,.05)}
.cat .t{font-weight:750}
.cat .m{color:var(--muted); margin-top:6px; font-size:13px}

.pagehead{display:flex; justify-content:space-between; align-items:flex-end; gap:10px; margin:10px 0 12px}

/* toolbar layout */
.toolbar{display:flex; gap:10px; flex-wrap:wrap; align-items:flex-end;}
.toolbar .field{min-width:190px}

.field label{display:block; font-size:12px; color:var(--muted); margin-bottom:6px; font-weight:650}
.field input,.field select{
  width:100%;
  background: rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px 10px;
  color:var(--text);
  outline:none;
  -webkit-appearance:none;
  appearance:none;
}
.field input:focus,.field select:focus{border-color: rgba(124,92,255,.6)}

/* ✅ Dropdown menu fix (works best in Chrome/Edge/Firefox; Safari may ignore option styling) */
.field select,
select{
  color: var(--text);
  background-color: rgba(255,255,255,.04);
}
.field select option,
.field select optgroup,
select option,
select optgroup{
  background-color: #0b1020 !important;
  color: rgba(255,255,255,.92) !important;
}
select:focus{ outline: none; }

.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:12px;
}
@media (max-width:1000px){ .grid{grid-template-columns: repeat(2, 1fr);} }
@media (max-width:700px){ .grid{grid-template-columns:1fr;} }

.item-title{font-weight:800; margin-bottom:6px}
.item-meta{color:var(--muted); font-size:13px; line-height:1.35}
.tagrow{display:flex; gap:8px; flex-wrap:wrap}
.tag{
  font-size:12px;
  padding:5px 9px;
  border-radius:999px;
  border:1px solid var(--border);
  color:var(--muted);
  background:rgba(255,255,255,.03);
}
.tag.info{border-color:rgba(22,214,255,.35); color:rgba(22,214,255,.9)}

.list .rowitem{
  border:1px solid var(--border);
  background:rgba(255,255,255,.02);
  border-radius:14px;
  padding:12px;
  margin-bottom:10px;
}
.list .rowitem:last-child{margin-bottom:0}

.layout2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
  margin-top:12px;
}
@media (max-width:900px){ .layout2{grid-template-columns:1fr} }

.formgrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:10px;
}
@media (max-width:700px){ .formgrid{grid-template-columns:1fr} }

.inputbox{
  border:1px solid var(--border);
  background:rgba(255,255,255,.02);
  border-radius:14px;
  padding:10px;
}
.inputbox .k{font-size:12px; color:var(--muted); font-weight:700}
.inputbox .h{font-size:12px; color:var(--muted2); margin-top:6px; line-height:1.35}
.inputbox input{
  margin-top:8px;
  width:100%;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px;
  color:var(--text);
}
.inputbox input.invalid{border-color: rgba(255,77,109,.6);}

.preview{
  margin-top:12px;
  background:#070c16;
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px;
  overflow:auto;
  max-height:560px;
  font-size:12.5px;
  line-height:1.55;
  color:rgba(255,255,255,.88);
}

.tabs{display:flex; gap:10px; margin:12px 0}
.tab{
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  color:var(--muted);
  padding:9px 12px;
  border-radius:999px;
  cursor:pointer;
  font-weight:750;
}
.tab.active{color:var(--text); border-color: rgba(124,92,255,.45); background:rgba(124,92,255,.14)}
.hidden{display:none}

.doc{color:rgba(255,255,255,.88); line-height:1.65; font-size:14px}
.doc h1,.doc h2,.doc h3{margin:14px 0 8px}
.doc code{background:rgba(255,255,255,.06);border:1px solid var(--border);padding:2px 6px;border-radius:6px}
.doc pre{background:#070c16;border:1px solid var(--border);padding:12px;border-radius:12px;overflow:auto}
.doc a{color:#7aa7ff}

/* =========================================================
   Keyword Sample Viewer (isolated) — DOES NOT TOUCH SITE UI
   ========================================================= */
body.lsd-modal-open{ overflow: hidden; }

.lsd-modal{
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.lsd-modal__dialog{
  width: min(980px, 100%);
  max-height: calc(100vh - 36px);
  overflow: auto;
  border-radius: 14px;
  background: #111827;
  border: 1px solid rgba(255,255,255,.10);
  box-shadow: 0 18px 60px rgba(0,0,0,.50);
  padding: 14px;
}

.lsd-modal__header{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}

.lsd-modal__title{
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.lsd-modal__subtitle{
  margin-top: 4px;
  font-size: 12px;
  color: rgba(255,255,255,.70);
  line-height: 1.4;
}

.lsd-modal__body{ padding-top: 12px; }

.lsd-tags{ display:flex; gap:6px; flex-wrap:wrap; }
.lsd-tag{
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  color: rgba(255,255,255,.92);
}
.lsd-tag--info{
  background: rgba(59,130,246,.15);
  border-color: rgba(59,130,246,.30);
}

.lsd-bar{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.lsd-btnrow{ display:flex; gap:8px; flex-wrap:wrap; }

.lsd-btn{
  appearance:none;
  cursor:pointer;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.92);
}
.lsd-btn:hover{ filter: brightness(1.08); }

.lsd-btn--primary{
  background: rgba(59,130,246,.18);
  border-color: rgba(59,130,246,.30);
}
.lsd-btn--danger{
  background: rgba(239,68,68,.16);
  border-color: rgba(239,68,68,.28);
}

.lsd-code{
  background: rgba(0,0,0,.35);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
  white-space: pre;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono","Courier New", monospace;
  font-size: 13px;
  line-height: 1.45;
  color: rgba(255,255,255,.92);
}

.lsd-list{ display:grid; gap: 10px; }

.lsd-item{
  border-radius: 12px;
  padding: 12px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.10);
  display:flex;
  align-items:flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.lsd-item__left{ min-width: 260px; }

.lsd-item__title{
  font-weight: 700;
  color: rgba(255,255,255,.95);
}

.lsd-item__meta{
  margin-top: 4px;
  font-size: 12px;
  color: rgba(255,255,255,.70);
}

.lsd-item__right{ display:flex; gap:8px; flex-wrap:wrap; }

.lsd-note{
  padding: 12px;
  border-radius: 12px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.10);
  color: rgba(255,255,255,.85);
}

/* TikZJax: center SVG and keep it responsive */
.tikzjax svg,
svg.tikzjax {
  display: block;
  margin: 1rem auto;
  max-width: 100%;
  height: auto;
}

/* If a diagram is wide, allow horizontal scroll instead of breaking layout */
.tikzjax {
  overflow-x: auto;
}