/* Shared experiment header shell, derived from the V2 site header but scoped to
   experiment pages so we do not pull in unrelated layout resets or progress-bar styles. */

#header-common{position:sticky;top:0;z-index:100}
#header-common .hdr{background:#3a3632;position:relative;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.12)}
#header-common .hdr-in{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:.5rem 1.5rem}
#header-common .logo{font-size:1.2rem;font-weight:800;letter-spacing:-.5px;color:#f5f2ec;display:flex;align-items:center;gap:.4rem;text-decoration:none}
#header-common .logo:hover{text-decoration:none}
#header-common .logo-mark{flex-shrink:0;width:26px !important;height:26px !important}
#header-common .logo .ai{color:#93c5fd}
#header-common .logo .love{color:#fca5a5}
#header-common .hdr-r{display:flex;align-items:center;gap:.6rem}
#header-common .hdr-primary{display:flex;gap:.6rem;align-items:center}
#header-common .hdr-primary a{font-size:.78rem;font-weight:600;color:#d6d0c8;transition:color .15s;text-decoration:none}
#header-common .hdr-primary a:hover{color:#fff;text-decoration:none}
#header-common .lang-switch{display:flex;gap:.3rem;align-items:center}
#header-common .lang-flag{flex-shrink:0;border-radius:1px;vertical-align:middle;width:16px !important;height:8px !important}
#header-common .lang{border:1px solid rgba(255,255,255,.15);padding:.15rem .45rem;border-radius:4px;font-size:.7rem;color:#d6d0c8;text-decoration:none;display:flex;align-items:center;gap:.25rem;transition:all .15s}
#header-common .lang:hover{border-color:rgba(255,255,255,.4);color:#fff;text-decoration:none;background:rgba(255,255,255,.06)}
#header-common .lang.active{border-color:#b45309;color:#fff;background:rgba(180,83,9,.2)}
#header-common .burger{background:none;border:1px solid rgba(255,255,255,.15);cursor:pointer;padding:.35rem .45rem;border-radius:6px;display:flex;flex-direction:column;gap:3px;transition:border-color .15s}
#header-common .burger:hover{border-color:rgba(255,255,255,.35)}
#header-common .burger span{display:block;width:16px;height:2px;background:#d6d0c8;border-radius:2px}
#header-common .menu-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:199}
#header-common .menu-overlay.open{display:block}
#header-common .slide-menu{position:fixed;top:0;right:-280px;width:280px;height:100%;background:#3a3632;z-index:200;transition:right .25s ease;box-shadow:-4px 0 20px rgba(0,0,0,.3);overflow-y:auto;padding:1rem 0}
#header-common .slide-menu.open{right:0}
#header-common .menu-close{background:none;border:none;color:#d6d0c8;font-size:1.3rem;cursor:pointer;padding:.3rem .8rem;display:block;margin-left:auto}
#header-common .menu-close:hover{color:#fff}
#header-common .menu-section{padding:.5rem 1.2rem}
#header-common .menu-section-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:rgba(214,208,200,.4);margin-bottom:.35rem}
#header-common .menu-section a{display:flex;align-items:center;gap:.5rem;padding:.5rem .4rem;font-size:.85rem;font-weight:600;color:#d6d0c8;border-radius:6px;transition:background .15s;text-decoration:none}
#header-common .menu-section a:hover{background:rgba(255,255,255,.08);color:#fff;text-decoration:none}
#header-common .menu-section a .m-icon{font-size:1rem;width:22px;text-align:center;flex-shrink:0}
#header-common .menu-divider{border:none;border-top:1px solid rgba(255,255,255,.08);margin:.4rem 1.2rem}
#header-common .hdr-tagline{font-size:.65rem;color:rgba(255,255,255,.35);font-style:italic;margin-left:.6rem;white-space:nowrap}

@media(max-width:900px){
  #header-common .hdr-tagline{display:none}
}

@media(max-width:600px){
  #header-common .hdr-primary{display:none}
  #header-common .lang-switch{gap:.2rem}
  #header-common .lang{font-size:0;line-height:0;padding:.25rem .3rem;gap:0}
  #header-common .lang .lang-flag{width:20px !important;height:10px !important}
}

@media(max-width:380px){
  #header-common .logo{font-size:1rem}
  #header-common .lang{padding:.2rem .25rem}
  #header-common .lang .lang-flag{width:18px !important;height:9px !important}
}