/* ============================================================
   TURBULENT — NAVIGATION COMPONENT
   Additive only. style.css is untouched. Tokens per design-system/LOCKED.md
   One DOM, two layouts: desktop panels / mobile accordion.
   ============================================================ */

/* 3-column grid so the centre group is centred in the VIEWPORT,
   independent of how wide the logo or the right-hand group are. */
.tnav{position:fixed;inset:0 0 auto;z-index:50;height:68px;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;
  padding:0 var(--pad);
  background:rgba(5,6,7,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
  transform:translateZ(0)}   /* own compositing layer: iOS/Android WebKit can otherwise
                                render an autoplaying <video> above a z-index-stacked sibling */
.tnav .wm{font-size:15px}
.tnav a{color:inherit}

/* ---------- lists ---------- */
/* display:contents lifts the two groups into the header grid, so one DOM
   serves both the desktop bar and the mobile drawer. */
.tnav-nav{display:contents}
.tnav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0}
.tnav-centre{grid-column:2;justify-self:center;gap:clamp(18px,2.6vw,38px)}
.tnav-right{grid-column:3;justify-self:end;gap:clamp(14px,1.6vw,24px)}

/* ---------- triggers ---------- */
.tnav-item{font-family:var(--sans);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  background:none;border:0;padding:8px 0;color:var(--fg-2);cursor:pointer;
  display:inline-flex;align-items:center;gap:.5em;transition:color .2s;position:relative}
.tnav-item:hover,.tnav-item[aria-expanded="true"]{color:var(--fg-3)}   /* Anduril: hovered item DIMS */
.tnav-item.is-soon{color:var(--fg-3)}
.tnav-item.is-soon:hover,.tnav-item.is-soon[aria-expanded="true"]{color:var(--fg-2)}
.tnav-item[aria-current="page"]{color:var(--fg)}
.tnav-item[aria-current="page"]::after{content:'';position:absolute;left:0;right:0;bottom:0;
  height:1px;background:var(--signal)}
.tnav-item .pm{font-family:var(--mono);font-size:13px;line-height:1;transition:transform .2s}
.tnav-item[aria-expanded="true"] .pm{transform:rotate(45deg)}
.tnav-item:focus-visible{outline:1px solid var(--fg);outline-offset:4px}

/* ---------- search ---------- */
.tnav-search{width:44px;height:44px;padding:0;justify-content:center}
.tnav-search svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.25}
.tnav-search .lbl{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.tnav-search[aria-expanded="true"]{color:var(--fg)}
.tnav-panel--search{display:block;min-height:0;padding:36px var(--pad) 44px}
.tnav-field{display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--line-2);
  padding-bottom:16px;transition:border-color .2s}
.tnav-field:focus-within{border-color:var(--fg)}
.tnav-field svg{width:19px;height:19px;stroke:var(--fg-3);fill:none;stroke-width:1.25;flex:none}
.tnav-field input{flex:1;background:none;border:0;color:var(--fg);
  font-family:var(--display);font-size:clamp(18px,3vw,32px);text-transform:uppercase;
  letter-spacing:.04em;padding:6px 0}
.tnav-field input::placeholder{color:var(--fg-3);text-transform:uppercase}
.tnav-field input:focus{outline:none}
.tnav-hint{margin-top:14px;font-family:var(--mono);font-size:10px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--fg-3)}
.tnav-results{list-style:none;margin:26px 0 0;padding:0;max-height:44vh;overflow-y:auto}
.tnav-results a{display:flex;align-items:baseline;gap:16px;min-height:52px;padding:8px 0;
  border-top:1px solid var(--line);color:var(--fg-2);text-decoration:none;transition:color .2s}
.tnav-results a:hover{color:var(--fg)}
.tnav-results a:focus-visible{outline:1px solid var(--fg);outline-offset:3px}
.tnav-results .t{font-size:17px}
.tnav-results .d{font-size:13px;color:var(--fg-3);margin-left:auto;text-align:right;
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase}
.tnav-empty{margin-top:26px;font-size:14px;color:var(--fg-3)}

/* ---------- panel ---------- */
.tnav-panel{position:fixed;top:68px;left:0;right:0;z-index:49;
  background:var(--ink);border-bottom:1px solid var(--line);
  padding:48px var(--pad) 56px;min-height:280px;
  display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(32px,6vw,110px);
  opacity:0;transform:translateY(-8px);pointer-events:none;
  transition:opacity .14s ease-in,transform .14s ease-in,visibility .14s;visibility:hidden}
.tnav-panel.is-open{opacity:1;transform:none;pointer-events:auto;visibility:visible;
  transition:opacity .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1)}

.tnav-panel .eyebrow{margin-bottom:22px}
.tnav-desc{font-size:15px;line-height:1.6;color:var(--fg-2);max-width:48ch}

.tnav-links{list-style:none;margin:0;padding:0}
.tnav-links a,.tnav-status{display:flex;align-items:center;gap:14px;min-height:44px;
  font-size:17px;color:var(--fg-2);text-decoration:none;transition:color .2s}
.tnav-links a:hover{color:var(--fg)}
.tnav-links a:focus-visible{outline:1px solid var(--fg);outline-offset:3px}
.tnav-links .pfx{font-family:var(--mono);font-size:13px;color:var(--fg-3);flex:none;width:1em}
.tnav-links a:hover .pfx{color:var(--signal)}
.tnav-links .meta{font-family:var(--mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--fg-3);margin-left:auto}

.tnav-status{color:var(--fg-3);font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;min-height:auto;margin-bottom:26px}
.tnav-status .dot{width:6px;height:6px;border:1px solid var(--fg-3);border-radius:50%;flex:none}

/* ---------- scrim ---------- */
.tnav-scrim{position:fixed;inset:68px 0 0;z-index:40;background:rgba(5,6,7,.6);
  opacity:0;pointer-events:none;transition:opacity .2s}
.tnav-scrim.is-open{opacity:1;pointer-events:auto}

/* ---------- burger ---------- */
.tnav-burger{display:none;background:none;border:0;cursor:pointer;color:var(--fg);
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;padding:8px 0}
.tnav-burger:focus-visible{outline:1px solid var(--fg);outline-offset:4px}

/* ============================================================
   MOBILE — same DOM, accordion layout
   ============================================================ */
@media (max-width:900px){
  .tnav-burger{display:block}

  /* .tnav's own transform makes IT the containing block for position:fixed descendants
     (that's the WebKit video-stacking fix above) — so `inset` here would resolve against
     .tnav's 68px box, not the viewport, and collapse to ~0 height. position:absolute +
     an explicit vh-based height sidesteps that; visually it still tracks the viewport
     because .tnav itself is pinned via position:fixed. */
  .tnav-nav{position:absolute;top:100%;left:0;right:0;height:calc(100vh - 68px);z-index:48;
    background:var(--ink);
    overflow-y:auto;overscroll-behavior:contain;padding:8px var(--pad) 48px;
    display:none;flex-direction:column;
    transform:translateZ(0)}
  .tnav-nav.is-open{display:flex}

  .tnav{grid-template-columns:1fr auto}
  .tnav-list{flex-direction:column;align-items:stretch;width:100%;margin:0}
  .tnav-centre,.tnav-right{grid-column:auto;justify-self:stretch}
  .tnav-right{margin:8px 0 0;padding-top:8px;border-top:1px solid var(--line)}
  .tnav-search{width:100%;height:auto;min-height:56px;flex-direction:row-reverse;
    justify-content:space-between}
  .tnav-search svg{width:19px;height:19px}
  .tnav-search .lbl{position:static;width:auto;height:auto;clip-path:none}
  .tnav-panel--search{padding:0 0 8px}
  .tnav-results{max-height:none}

  .tnav-li{border-bottom:1px solid var(--line)}
  .tnav-right .tnav-li:last-child{border-bottom:0}

  .tnav-item{width:100%;min-height:56px;justify-content:space-between;
    font-size:15px;letter-spacing:.1em;color:var(--fg)}
  .tnav-item:hover,.tnav-item[aria-expanded="true"]{color:var(--fg)}
  .tnav-item.is-soon{color:var(--fg-3)}
  .tnav-item[aria-current="page"]::after{display:none}
  .tnav-item .pm{font-size:18px;color:var(--fg-3)}

  /* panel becomes an inline accordion drawer.
     padding lives only on .is-open — padding-bottom on the closed state would
     still render (height:0 doesn't zero out padding), clipping an 8px sliver
     of the description through as a visible "ghost" line under every item. */
  .tnav-panel{position:static;display:block;padding:0;min-height:0;
    border-bottom:0;background:transparent;visibility:visible;
    height:0;overflow:hidden;opacity:1;transform:none;pointer-events:auto;
    transition:height .22s cubic-bezier(.2,.7,.3,1)}
  .tnav-panel.is-open{height:auto;padding-bottom:8px}
  .tnav-panel .eyebrow{display:none}
  .tnav-desc{font-size:14px;max-width:none;margin-bottom:14px}
  .tnav-links a,.tnav-status{min-height:48px;font-size:16px}
  .tnav-scrim{display:none}
}

@media (prefers-reduced-motion:reduce){
  .tnav-panel,.tnav-scrim,.tnav-item,.tnav-item .pm{transition:none!important}
}