/* R5.20 — identity header + responsive horizontal mobile navigation */
.bvs-header-r517{position:sticky;top:0;z-index:40;border-bottom:1px solid var(--color-line);background:rgb(0 0 0 / .95);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.bvs-header-r517__inner{max-width:78rem;margin:0 auto;padding:12px 20px 11px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.bvs-header-r517__identity{width:380px;margin-left:-34px;display:flex;flex:0 0 auto;flex-direction:column;align-items:center;justify-content:center;text-align:center;line-height:1;text-decoration:none;min-width:0}
.bvs-header-r517__name{font-family:var(--font-display);font-size:15px;letter-spacing:.16em;color:var(--color-fg);white-space:nowrap}
.bvs-header-r517__tagline{margin-top:5px;font-family:var(--font-sans);font-size:11px;line-height:1.22;font-style:italic;font-weight:400;letter-spacing:0;color:var(--color-accent);white-space:nowrap}
.bvs-header-r517__nav{display:flex;align-items:center;justify-content:flex-end;gap:24px;white-space:nowrap;min-width:0}
.bvs-header-r517__nav>a{flex:0 0 auto}
.bvs-header-r517__nav>div{flex:0 0 auto}
@media(max-width:1200px) and (min-width:1041px){
  .bvs-header-r517__inner{padding-left:16px;padding-right:16px;gap:16px}
  .bvs-header-r517__identity{width:300px;margin-left:-6px}
  .bvs-header-r517__nav{gap:14px}
  .bvs-header-r517__tagline{font-size:10.3px}
}
@media(max-width:1040px){
  .bvs-header-r517__inner{padding:10px 0 7px;display:flex;flex-direction:column;align-items:center;gap:9px}
  .bvs-header-r517__identity{width:100%;margin-left:0;padding:0 12px;align-items:center;text-align:center}
  .bvs-header-r517__name{font-size:14px;letter-spacing:.15em}
  .bvs-header-r517__tagline{margin-top:5px;font-size:11px;line-height:1.25;max-width:calc(100vw - 24px);white-space:nowrap}
  .bvs-header-r517__nav{width:100%;justify-content:flex-start;gap:20px;overflow-x:auto;overflow-y:hidden;padding:2px 14px 5px;scrollbar-width:none;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;scroll-snap-type:x proximity}
  .bvs-header-r517__nav::-webkit-scrollbar{display:none}
  .bvs-header-r517__nav>a,.bvs-header-r517__nav>div{scroll-snap-align:start}
  .bvs-header-r517__nav>a{font-size:11px!important;letter-spacing:.18em!important;padding:0!important}
}
@media(max-width:430px){
  .bvs-header-r517__inner{gap:8px}
  .bvs-header-r517__name{font-size:13px;letter-spacing:.14em}
  .bvs-header-r517__tagline{font-size:10.5px;max-width:calc(100vw - 16px)}
  .bvs-header-r517__nav{gap:18px;padding-left:10px;padding-right:10px}
  .bvs-header-r517__nav>a{font-size:10.5px!important;letter-spacing:.17em!important}
}