:root{
  /* Neutrals */
  --bg:#ffffff;
  --surface:#ffffff;
  --text:#0b0f1a;
  --muted:#5b6475;
  --border:#e6e8ee;

  /* Brand accents */
  --accent:#5a2ca0;
  --accent-2:#d93b8f;
  --accent-3:#f4c430;
  --accent-4:#2bb3d6;

  /* Type */
  --font-sans:Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  --lh-tight:1.1;
  --lh-body:1.55;

  /* Layout */
  --container:1280px;
  --gutter:24px;

  /* Radius */
  --r-card:16px;
  --r-btn:999px;

  /* Shadow */
  --shadow-sm:0 6px 20px rgba(10,15,25,.08);

  /* Helper */
  --accent-soft:#f3eefb;
  --chip:#f7f3fc;
}

*{box-sizing:border-box}
html,body{width:100%}
body{margin:0;font-family:var(--font-sans);background:var(--bg);color:var(--text);height:100vh;overflow:hidden}

.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:88px 0}
.kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;color:var(--muted)}
h1,h2{line-height:var(--lh-tight);letter-spacing:-0.02em}
p{line-height:var(--lh-body);color:var(--muted);font-size:16px}

.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--border);background:var(--surface);position:sticky;top:0;z-index:5}
h1{margin:0;font-size:1.2rem}
.topbar p{margin:4px 0 0;color:var(--muted);font-size:.92rem}
.badge{font-size:.8rem;padding:6px 10px;background:var(--accent-soft);border-radius:var(--r-btn);color:var(--accent);border:1px solid #e8def8}

.layout{display:grid;grid-template-columns:280px 1fr 360px;gap:12px;padding:12px;height:calc(100vh - 74px)}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-card);padding:12px}
.controls,.detail{position:sticky;top:0;align-self:start;max-height:100%;overflow:auto}
.viz{overflow:auto;max-height:100%}

.controls label{display:block;margin-bottom:10px;font-size:.9rem;color:var(--muted)}
input,select{width:100%;margin-top:6px;background:#fff;color:var(--text);border:1px solid var(--border);padding:10px;border-radius:12px}
.check{display:flex!important;align-items:center;gap:8px;color:var(--text)!important}
.check input{width:auto;margin:0}
.row-btns{display:grid;grid-template-columns:1fr 1fr;gap:8px}

.chips{display:flex;flex-wrap:wrap;gap:8px;max-height:260px;overflow:auto}
.chip{display:inline-flex;align-items:center;padding:10px 14px;border-radius:var(--r-btn);border:1px solid var(--border);color:var(--text);font-weight:600;font-size:14px;background:var(--chip);cursor:pointer}
.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}
.match-mode{display:inline-flex;border:1px solid var(--border);border-radius:var(--r-btn);overflow:hidden;min-width:0;flex-wrap:wrap}
.mode-btn{border:0;background:#fff;color:var(--muted);padding:8px 12px;font-weight:700;cursor:pointer;font-size:12px}
.mode-btn + .mode-btn{border-left:1px solid var(--border)}
.mode-btn.active{background:var(--accent);color:#fff}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:var(--r-btn);font-weight:600;text-decoration:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(.95);box-shadow:var(--shadow-sm)}
.btn-secondary{border:1px solid var(--border);color:var(--text);background:transparent}

.ghost{margin-top:12px;width:100%;background:transparent;color:var(--text);border:1px solid var(--border);padding:10px;border-radius:var(--r-btn);cursor:pointer;font-weight:600}
.mobile-only{display:none}
.ghost:hover{border-color:var(--accent);color:var(--accent);box-shadow:var(--shadow-sm)}

.section-header{display:flex;justify-content:space-between;align-items:center}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0}
.list{display:flex;flex-direction:column;gap:8px;max-height:200px;overflow:auto}
.list-item{background:#faf8fe;border:1px solid #eee6fb;padding:8px 10px;border-radius:12px;font-size:.85rem}
button.list-item{width:100%;font-family:inherit;background:#faf8fe}
button.list-item:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}
.active-strip{margin:8px 0 10px;padding:8px 10px;border:1px solid var(--border);border-radius:12px;background:#fafbff}

.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.85rem}
th,td{border-bottom:1px solid var(--border);padding:8px;text-align:left;white-space:nowrap}
th{position:sticky;top:0;background:#faf8fe}
.cell{border-radius:8px;padding:4px 8px;display:inline-block;cursor:pointer}

.session-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.card{border:1px solid var(--border);border-radius:var(--r-card);background:var(--surface);padding:20px}
.card h4{margin:0 0 6px;font-size:.95rem;line-height:1.3}
.meta{font-size:.78rem;color:var(--muted);margin-bottom:8px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{background:#f3eefb;border-radius:var(--r-btn);padding:3px 8px;font-size:.72rem;color:#4a2c78}

.muted{color:var(--muted);font-size:.9rem}
.detail h3{margin:.2rem 0}
.detail ul{margin:.4rem 0 .8rem 1.1rem;padding:0}
.theme-link{cursor:pointer;text-decoration:underline dotted}
.mobile-filters-backdrop{display:none}

@media (max-width:1200px){
  body{height:auto;overflow:auto;padding-bottom:72px;overflow-x:hidden}
  .topbar{flex-wrap:nowrap;gap:0;padding:10px 12px}
  .topbar > div:first-child{min-width:0;flex:1}
  .topbar p,.badge{display:none}
  h1{font-size:1rem}

  .layout{grid-template-columns:1fr;height:auto;gap:10px;padding:10px}
  .panel{min-height:auto;padding:10px}
  .viz{position:static;max-height:none;overflow:visible}
  .detail{display:none}
  .grid2{grid-template-columns:1fr}
  .mobile-only{display:none}

  /* Mobile-first: filters as bottom sheet */
  .controls{
    position:fixed;left:0;right:0;bottom:0;top:64px;
    background:#fff;z-index:35;overflow:auto;
    border-radius:18px 18px 0 0;border:1px solid var(--border);
    box-shadow:var(--shadow-sm);
    transform:translateY(0);transition:transform .24s ease;
  }
  .controls.collapsed{transform:translateY(105%)}
  .controls h2{position:sticky;top:0;background:#fff;padding-bottom:8px;margin-top:0;border-bottom:1px solid var(--border)}

  .mobile-filters-backdrop{position:fixed;inset:0;background:rgba(10,15,25,.35);z-index:34;display:none}
  .mobile-filters-backdrop.open{display:block}

  .active-strip{position:sticky;top:0;background:#fff;z-index:4}
  .session-list{grid-template-columns:1fr}
  .card{padding:14px}
  .chips{max-height:none}
  .row-btns{grid-template-columns:1fr 1fr}
  .match-mode{width:100%}
  .mode-btn{flex:1}

  .mobile-actions{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;padding:8px 10px;background:#fff;border-top:1px solid var(--border);z-index:40}
  .mobile-actions .ghost{margin-top:0;padding:10px}

  .mobile-modal{position:fixed;inset:0;background:rgba(10,15,25,.38);display:none;align-items:flex-end;z-index:45}
  .mobile-modal.open{display:flex}
  .mobile-modal-card{background:#fff;border-top-left-radius:18px;border-top-right-radius:18px;padding:12px;max-height:82vh;overflow:auto;width:100%;box-shadow:var(--shadow-sm)}

  input,select,.ghost,.chip{font-size:16px}
}

@media (min-width:1201px){
  .mobile-actions,.mobile-modal{display:none!important}
}