:root {
  --ink: #0b0b0b; --ink2: #52514e; --muted: #898781; --line: #e1e0d9; --surface: #fcfcfb;
  --page: #f5f4f0; --accent: #2a78d6; --accent-soft: #e8f1fc; --err: #c23030;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--ink);
       font: 14px/1.45 Inter, "Segoe UI", system-ui, sans-serif; }
.shell { display: flex; min-height: 100vh; }
.sidebar { width: 330px; flex: none; padding: 18px 18px 40px; background: var(--surface);
           border-right: 1px solid var(--line); position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.main { flex: 1; min-width: 0; padding: 12px 20px 40px; }
.title { font-size: 20px; margin-bottom: 2px; }
.brand { font-weight: 700; } .brand2 { font-weight: 400; color: var(--ink2); }
.muted { color: var(--muted); } .small { font-size: 12px; } .mono { font-family: ui-monospace, Consolas, monospace; }
.ctl-label { display: block; font-size: 12px; font-weight: 600; color: var(--ink2); margin: 14px 0 4px;
             text-transform: uppercase; letter-spacing: .04em; }
.ctl-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.ctl .ctl-label { margin-top: 0; }
.toolbar { display: flex; flex-wrap: wrap; gap: 14px 18px; align-items: flex-end; margin: 6px 0 10px; }
.ctl { min-width: 0; }
.checks label { display: inline-flex !important; flex-direction: row !important; align-items: center; gap: 6px;
                margin-right: 16px; cursor: pointer; white-space: nowrap; padding: 2px 0; }
.checks label > span { display: inline-flex; align-items: center; }
.checks input { margin: 0; accent-color: var(--accent); }
.checks.col label { display: flex !important; margin: 2px 0; white-space: normal; }
.btn { border: 1px solid #c3c2b7; background: #fff; color: var(--ink); border-radius: 6px; padding: 7px 12px;
       font: inherit; cursor: pointer; margin-top: 14px; }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.sm { padding: 5px 9px; font-size: 12px; margin-top: 0; }
.btnrow { display: flex; gap: 6px; margin-top: 8px; align-items: center; }
.query { width: 100%; min-height: 36px; font-family: ui-monospace, Consolas, monospace; font-size: 13px;
         border: 1px solid #c3c2b7; border-radius: 6px; padding: 6px 8px; }
input.num { width: 100%; border: 1px solid #ccc; border-radius: 4px; padding: 7px 8px; font: inherit; }
.info { font-size: 13px; color: var(--ink2); margin: 2px 0 6px; min-height: 18px; }
.err { color: var(--err); margin-left: 12px; font-weight: 600; }
.section { font-size: 15px; margin: 22px 0 4px; }
.pane { padding-top: 8px; }
.tabs { border-bottom: 1px solid var(--line); display: flex; justify-content: flex-start; }
.tabs .tab { flex: none !important; width: auto !important; }
.tab { border: none !important; background: transparent !important; padding: 10px 16px !important;
       color: var(--ink2); font-weight: 500; }
.tab--on { border: none !important; border-bottom: 2px solid var(--accent) !important; color: var(--ink) !important;
           background: transparent !important; font-weight: 600; }
.dash-graph { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.show-hide { display: none; }
.dash-table-container { background: var(--surface); }
@media (max-width: 900px) {
  .shell { flex-direction: column; }
  .main { order: -1; padding: 8px 12px 24px; }          /* phones: tabs + chart first, sidebar below */
  .sidebar { width: auto; height: auto; position: static; border-right: none; border-top: 1px solid var(--line); }
  .tabs { overflow-x: auto; flex-wrap: nowrap; }
  .tabs .tab { white-space: nowrap; padding: 10px 12px !important; }
}
.about { font-size: 13px; color: var(--ink2); margin: 8px 0 6px; }
.guide { font-size: 12.5px; color: var(--ink2); background: #f3f2ee; border-radius: 6px; padding: 6px 10px; margin: 6px 0 8px; }
.guide summary { cursor: pointer; font-weight: 600; color: var(--ink); }
.guide p { margin: 6px 0 2px; }
.query-msg { font-size: 12.5px; margin-top: 4px; color: #0f7b3f; }
.err-inline { color: var(--err); font-weight: 600; }
.guide-pane { max-width: 920px; padding: 4px 4px 40px; }
.guide-md { font-size: 14.5px; line-height: 1.55; color: var(--ink); }
.guide-md h3 { font-size: 16px; margin: 22px 0 6px; }
.guide-md table { border-collapse: collapse; width: 100%; margin: 8px 0; background: var(--surface); }
.guide-md th, .guide-md td { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.guide-md th { background: #f3f2ee; font-weight: 600; }
.guide-md code { background: #f0efea; border-radius: 4px; padding: 1px 5px; font-size: 13px; }
.guide-md li { margin: 3px 0; }
@media (max-width: 700px) { .guide-md table { display: block; overflow-x: auto; } }
.ex-pick { margin: 10px 0 6px; }
.ex-h { font-size: 17px; margin: 6px 0 2px; }
.ex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; margin: 12px 0 26px; }
.ex-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line);
           border-radius: 10px; overflow: hidden; color: inherit; text-decoration: none; transition: border-color .15s, box-shadow .15s; }
.ex-card:hover { border-color: var(--accent); box-shadow: 0 2px 10px rgba(42,120,214,.12); }
.ex-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; object-position: top; background: #efeee8; display: block;
          border-bottom: 1px solid var(--line); }
.ex-body { padding: 10px 12px 12px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.ex-title { font-weight: 600; font-size: 14.5px; }
.ex-blurb { font-size: 13px; color: var(--ink2); flex: 1; }
.ex-open { font-size: 13px; color: var(--accent); font-weight: 600; margin-top: 4px; }