/* ============================================================================
   Osseus — "Use cases" nav dropdown.

   Shared across every page that renders the main site header. Opens on hover
   (pointer) and on focus (keyboard); becomes a plain expanded list inside the
   burger menu at <=768px. Pairs with /assets/use-case-menu.js.

   The panel is a floating glass card anchored under the trigger so it works
   both in the full-width header and in the scrolled "pill" state.
   ========================================================================= */

.nav-uc{position:relative;display:inline-flex}

.nav-uc-trigger{
  display:inline-flex;align-items:center;gap:6px;
  text-decoration:none;color:rgba(43,38,32,.72);
  padding:9px 13px;border-radius:100px;
  font:inherit;font-weight:500;line-height:inherit;
  background:none;border:0;cursor:pointer;
}
.nav-uc-trigger:hover,.nav-uc.is-open .nav-uc-trigger{color:#2B2620}
.nav-uc-trigger.is-active{color:#2B2620;font-weight:700}
.nav-uc-caret{
  width:9px;height:9px;flex:none;opacity:.65;
  transition:transform .22s cubic-bezier(.22,.61,.36,1);
}
.nav-uc.is-open .nav-uc-caret{transform:rotate(180deg)}

/* ---------- floating glass panel ---------- */
.nav-uc-panel{
  position:absolute;z-index:120;
  top:calc(100% + 12px);left:50%;
  width:min(600px,calc(100vw - 40px));
  transform:translateX(-50%) translateY(-6px);
  padding:12px;
  border:1px solid rgba(43,38,32,.15);
  border-radius:20px;
  /* near-opaque: page content behind the panel was showing through the text */
  background:rgba(253,251,248,.985);
  -webkit-backdrop-filter:blur(22px) saturate(1.5);
  backdrop-filter:blur(22px) saturate(1.5);
  box-shadow:inset 0 1px 0 #fff,0 30px 80px -26px rgba(43,38,32,.5),0 4px 14px -8px rgba(43,38,32,.18);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s ease,transform .22s cubic-bezier(.22,.61,.36,1),visibility .22s;
}
/* narrower variant for shorter menus */
.nav-uc-panel--sm{width:min(460px,calc(100vw - 40px))}

/* ---------- split variant: title list + preview pane (Product) ---------- */
.nav-uc-panel--split{width:min(720px,calc(100vw - 40px));padding:0}
.nav-uc-split{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1fr);gap:clamp(16px,2vw,26px);padding:22px 22px 20px}

.nav-uc-list{display:flex;flex-direction:column;min-width:0}
.ucl-item{
  display:block;padding:11px 2px;border-radius:8px;
  text-decoration:none;color:rgba(43,38,32,.44);
  font-size:16.5px;font-weight:500;letter-spacing:-.012em;line-height:1.3;
  transition:color .16s ease;
}
/* hover/keyboard is the strong state; the current page is only a soft marker,
   otherwise the two compete on the page the menu points at */
.ucl-item[aria-current="page"]{color:rgba(43,38,32,.66)}
.ucl-item:hover,.ucl-item.is-active{color:#2B2620}
.nav-uc-book{
  margin-top:14px;padding-top:14px;
  border-top:1px solid rgba(43,38,32,.1);
  font-size:14.5px;font-weight:650;text-decoration:none;color:#A9542C;
}
.nav-uc-book:hover{color:#8C4426}

/* ---------- preview pane: liquid glass over a tinted backdrop ---------- */
.nav-uc-previews{
  position:relative;min-width:0;overflow:hidden;
  border-radius:15px;
  padding:18px 18px 0;
  background:
    radial-gradient(88% 66% at 14% -4%,rgba(255,255,255,.62) 0%,rgba(255,255,255,0) 62%),
    radial-gradient(76% 74% at 104% 106%,rgba(232,216,193,.78) 0%,rgba(232,216,193,0) 64%),
    linear-gradient(157deg,#BFD3E5 0%,#CBCFE3 44%,#DFD5C7 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.34),inset 0 -22px 44px -26px rgba(31,42,64,.3);
}
/* fine grain so the tint doesn't read as flat vector colour */
.nav-uc-previews::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:3;
  opacity:.19;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:170px 170px;
}

.ucp{
  position:absolute;inset:18px 18px 0;
  opacity:0;transform:translateY(6px) scale(.985);
  transition:opacity .2s ease,transform .26s cubic-bezier(.22,.61,.36,1);
  pointer-events:none;
}
.ucp.is-active{opacity:1;transform:none;position:relative;inset:auto}

/* the glass window itself */
.ucp-win{
  position:relative;overflow:hidden;
  border:1px solid rgba(255,255,255,.7);
  border-bottom:0;
  border-radius:12px 12px 0 0;
  background:linear-gradient(180deg,rgba(255,255,255,.93) 0%,rgba(255,253,249,.8) 100%);
  -webkit-backdrop-filter:blur(16px) saturate(1.45);
  backdrop-filter:blur(16px) saturate(1.45);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.96),
    inset 0 0 0 1px rgba(255,255,255,.28),
    0 20px 42px -22px rgba(21,30,46,.5);
}
/* specular sheen across the top-left corner */
.ucp-win::before{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  background:linear-gradient(148deg,rgba(255,255,255,.6) 0%,rgba(255,255,255,.12) 26%,rgba(255,255,255,0) 52%);
}
.ucp-win>*{position:relative;z-index:1}

.ucp-bar{
  display:flex;align-items:center;gap:5px;
  padding:8px 11px;
  border-bottom:1px solid rgba(43,38,32,.09);
  background:linear-gradient(180deg,rgba(255,255,255,.6),rgba(255,255,255,.16));
}
.ucp-bar i{width:5px;height:5px;border-radius:50%;background:rgba(43,38,32,.16)}
.ucp-bar i:nth-child(1){background:rgba(169,84,44,.42)}
.ucp-bar i:nth-child(2){background:rgba(201,130,43,.4)}
.ucp-bar i:nth-child(3){background:rgba(120,146,114,.46)}
.ucp-bar span{margin-left:6px;font-size:9px;font-weight:650;letter-spacing:.01em;color:rgba(43,38,32,.52)}
/* fixed height keeps the pane still while switching items */
.ucp-body{padding:12px 13px 15px;height:176px}

/* shared atoms */
.ucp-head{display:flex;align-items:baseline;justify-content:space-between;gap:8px;margin-bottom:9px}
.ucp-head b{font-size:10.5px;font-weight:700;letter-spacing:-.01em}
.ucp-head em{font-style:normal;font-size:8.5px;font-weight:650;color:rgba(43,38,32,.48)}
.ucp-card{
  border:1px solid rgba(43,38,32,.1);border-radius:7px;
  background:rgba(255,255,255,.86);
  box-shadow:0 3px 10px -7px rgba(21,30,46,.6);
}
.ucp-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:10px}
.ucp-tag{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 8px;border-radius:100px;font-size:8.5px;font-weight:750;letter-spacing:.01em;
}
.ucp-tag::before{content:"";width:4px;height:4px;border-radius:50%;background:currentColor}
.ucp-tag.is-warn{color:#9C6413;background:rgba(201,130,43,.14);border:1px solid rgba(201,130,43,.28)}
.ucp-tag.is-ok{color:#4E6849;background:rgba(120,146,114,.15);border:1px solid rgba(120,146,114,.3)}
.ucp-owner{display:inline-flex;align-items:center;gap:5px;font-size:8.5px;font-weight:650;color:rgba(43,38,32,.5)}
.ucp-owner i{
  width:14px;height:14px;border-radius:50%;display:grid;place-items:center;
  background:#33507D;color:#fff;font-style:normal;font-size:6px;font-weight:800;letter-spacing:-.02em;
}
.ucp-cites{display:flex;flex-wrap:wrap;gap:4px}
.ucp-cites em{
  font-style:normal;padding:2px 6px;border-radius:4px;
  border:1px solid rgba(51,80,125,.26);background:rgba(51,80,125,.07);
  font-size:8px;font-weight:700;color:#33507D;white-space:nowrap;
}

/* memory layer */
.ucp-nodes{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}
.ucp-nodes span{
  display:flex;align-items:center;justify-content:center;gap:4px;
  height:22px;border-radius:5px;
  border:1px solid rgba(43,38,32,.1);background:rgba(255,255,255,.88);
  box-shadow:0 3px 9px -7px rgba(21,30,46,.65);
  font-size:8px;font-weight:700;color:rgba(43,38,32,.7);
}
.ucp-nodes i{width:5px;height:5px;border-radius:50%;background:var(--d,#33507D);flex:none}
.ucp-nodes--out{grid-template-columns:repeat(3,1fr)}
.ucp-nodes--out span{border-style:dashed;background:rgba(255,255,255,.62);color:rgba(43,38,32,.56)}
.ucp-fan{display:block;width:100%;height:15px;color:#A9542C}
.ucp-fan path{fill:none;stroke:currentColor;stroke-width:1;opacity:.42;vector-effect:non-scaling-stroke}
.ucp-hub{
  display:flex;align-items:center;justify-content:center;gap:7px;
  padding:7px 10px;border-radius:8px;
  border:1px solid rgba(169,84,44,.26);
  background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(240,244,255,.86));
  box-shadow:inset 0 1px 0 #fff,0 6px 16px -10px rgba(169,84,44,.55);
}
.ucp-hub img{width:15px;height:15px;display:block;flex:none}
.ucp-hub b{display:block;font-size:10px;font-weight:750;letter-spacing:-.01em;line-height:1.2}
.ucp-hub small{display:block;font-size:8px;color:rgba(43,38,32,.5);line-height:1.3}

/* change impact */
.ucp-line{
  display:flex;align-items:center;gap:7px;padding:7px 9px;font-size:9.5px;
  border:1px solid rgba(43,38,32,.1);border-radius:7px;
  background:rgba(255,255,255,.86);box-shadow:0 3px 10px -8px rgba(21,30,46,.6);
}
.ucp-line + .ucp-line{margin-top:5px}
.ucp-line>i{width:5px;height:5px;border-radius:50%;flex:none}
.ucp-line>i.is-warn{background:#C9822B;box-shadow:0 0 0 2.5px rgba(201,130,43,.18)}
.ucp-line>i.is-ok{background:#789272;box-shadow:0 0 0 2.5px rgba(120,146,114,.18)}
.ucp-line span{flex:1;font-weight:650;color:rgba(43,38,32,.82)}
.ucp-line em{font-style:normal;font-weight:750;color:rgba(43,38,32,.44)}

/* design review */
.ucp-doc{display:grid;gap:6px;margin-bottom:9px}
.ucp-doc span{height:5px;border-radius:3px;background:rgba(43,38,32,.1)}
.ucp-doc span.is-flagged{
  height:auto;padding:5px 8px;border-radius:6px;
  border:1px solid rgba(169,84,44,.32);background:rgba(169,84,44,.09);
  font-size:8.5px;font-weight:700;color:#8E4522;
}
.ucp-flag{
  padding:8px 10px;border-radius:7px;
  border:1px solid rgba(169,84,44,.28);
  background:linear-gradient(180deg,rgba(255,253,249,.96),rgba(253,246,240,.9));
  box-shadow:0 6px 16px -12px rgba(142,69,34,.7);
}
.ucp-flag b{display:flex;align-items:flex-start;gap:5px;font-size:9.5px;font-weight:700;line-height:1.35;color:#A9542C;margin-bottom:6px}
.ucp-flag b i{font-style:normal;flex:none}

/* workflows */
.ucp-ask{
  display:flex;align-items:center;gap:7px;margin-bottom:9px;
  padding:7px 10px;border-radius:100px;
  border:1px solid rgba(43,38,32,.13);
  background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(255,255,255,.76));
  box-shadow:inset 0 1px 0 #fff,0 4px 12px -8px rgba(21,30,46,.6);
}
.ucp-ask svg{width:10px;height:10px;flex:none;color:rgba(43,38,32,.4)}
.ucp-ask span{font-size:9.5px;font-weight:650;color:rgba(43,38,32,.74)}
.ucp-answer{
  padding:9px 10px;border-radius:7px;
  border:1px solid rgba(43,38,32,.1);
  background:rgba(255,255,255,.88);box-shadow:0 4px 12px -9px rgba(21,30,46,.6);
}
.ucp-answer b{display:flex;align-items:center;gap:5px;font-size:9px;font-weight:750;color:#4E6849;margin-bottom:7px}
.ucp-answer b img{width:11px;height:11px;display:block;opacity:.8}
.ucp-lines{display:grid;gap:5px;margin-bottom:8px}
.ucp-lines i{display:block;height:4px;border-radius:2px;background:rgba(43,38,32,.1)}

@media (max-width:768px){
  /* the burger list gets the titles only — no preview pane */
  .nav-uc-panel--split{width:auto;padding:2px 0 10px}
  .nav-uc-split{display:block;padding:0}
  .nav-uc-previews{display:none}
  .ucl-item{padding:11px 2px;font-size:16px;color:rgba(43,38,32,.72)}
  .ucl-item.is-active{color:rgba(43,38,32,.72)}
  .ucl-item:hover{color:#2B2620}
  .nav-uc-book{margin-top:10px;padding:12px 2px 0}
}
.nav-uc.is-open .nav-uc-panel{
  opacity:1;visibility:visible;pointer-events:auto;
  transform:translateX(-50%) translateY(0);
}
/* Hover bridge so the pointer can travel from trigger to panel */
.nav-uc-panel::before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px}

.nav-uc-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px}

.ucd-card{
  display:flex;align-items:flex-start;gap:11px;
  padding:11px 12px;border-radius:13px;
  text-decoration:none;color:#2B2620;
  border:1px solid transparent;
  transition:background .16s ease,border-color .16s ease;
}
.ucd-card:hover{background:rgba(239,231,219,.66);border-color:rgba(43,38,32,.1);color:#2B2620}
.ucd-ic{
  flex:none;width:32px;height:32px;border-radius:9px;
  display:grid;place-items:center;
  color:var(--ic,#A9542C);
  border:1px solid color-mix(in srgb,var(--ic,#A9542C) 26%,transparent);
  background:color-mix(in srgb,var(--ic,#A9542C) 9%,#fff);
}
.ucd-ic svg{width:17px;height:17px;display:block}
.ucd-copy{display:flex;flex-direction:column;gap:3px;min-width:0}
.ucd-copy b{font-size:13.5px;font-weight:700;letter-spacing:-.01em;line-height:1.25}
.ucd-copy small{font-size:11.5px;line-height:1.35;color:rgba(43,38,32,.55)}

.nav-uc-all{
  display:flex;align-items:center;justify-content:space-between;
  margin:8px 2px 2px;padding:10px 12px;
  border-top:1px solid rgba(43,38,32,.1);
  font-size:12.5px;font-weight:700;text-decoration:none;color:rgba(43,38,32,.72);
}
.nav-uc-all:hover{color:#A9542C}

/* ---------- mobile: flatten into the burger list ---------- */
@media (max-width:768px){
  .nav-uc{display:block;width:100%}
  .nav-uc-trigger{
    width:100%;justify-content:space-between;
    padding:14px 2px;border-top:1px solid rgba(43,38,32,.08);border-radius:0;
  }
  .nav-uc-panel{
    position:static;width:auto;transform:none;
    opacity:1;visibility:visible;pointer-events:auto;
    padding:2px 0 10px;margin:0;
    border:0;border-radius:0;background:none;
    -webkit-backdrop-filter:none;backdrop-filter:none;box-shadow:none;
    display:none;
  }
  .nav-uc.is-open .nav-uc-panel{display:block;transform:none}
  .nav-uc-panel::before{display:none}
  .nav-uc-grid{grid-template-columns:1fr;gap:0}
  .ucd-card{padding:10px 2px;border-radius:0}
  .ucd-card:hover{background:none;border-color:transparent}
  .nav-uc-all{margin:4px 2px 0;padding:12px 2px}
}

@media (prefers-reduced-motion:reduce){
  .nav-uc-panel,.nav-uc-caret{transition-duration:.001ms}
}