/* ===== COMMON HEADER / FOOTER (build_common.py) ===== */
  /* buttons */
  .btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--body);font-weight:600;font-size:clamp(.92rem,2.4vw,1rem);padding:14px 28px;border-radius:100px;border:1.5px solid transparent;cursor:pointer;transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s,filter .3s,background .3s,color .3s;white-space:nowrap;-webkit-tap-highlight-color:transparent;overflow:hidden;isolation:isolate}
  .btn:active{transform:translateY(1px) scale(.99)}
  .btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 28px -8px rgba(20,100,180,.55)}
  .btn-primary::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,#2E86DC,#41E0E8 60%,#2E86DC);opacity:0;transition:opacity .35s;z-index:-1}
  .btn-primary:hover{box-shadow:0 18px 40px -8px rgba(46,134,220,.65)}
  .btn-primary:hover::before{opacity:1}
  .btn-primary .sheen{position:absolute;top:0;left:-120%;width:60%;height:100%;background:linear-gradient(110deg,transparent,rgba(255,255,255,.45),transparent);transform:skewX(-18deg);transition:none}
  .btn-primary:hover .sheen{animation:sheen .9s ease}
  @keyframes sheen{from{left:-120%}to{left:160%}}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--blue);background:var(--mist);color:var(--blue)}
  .btn-ghost.on-dark{color:#fff;border-color:rgba(255,255,255,.32)}
  .btn-ghost.on-dark:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.65);color:#fff}
  .btn-light{background:#fff;color:var(--blue)}
  .btn-light:hover{background:var(--mist);box-shadow:var(--glow)}
  .btn svg{width:17px;height:17px}

  
  /* header */
  header#header{position:sticky;top:0;z-index:200;transition:background .35s,box-shadow .35s,backdrop-filter .35s;padding-right:var(--safe-r);padding-left:var(--safe-l)}
  header#header.scrolled{background:rgba(255,255,255,.82);backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);box-shadow:0 1px 0 var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:20px}
  .logo{display:flex;align-items:center;flex-shrink:0;transition:transform .3s}
  .logo:hover{transform:scale(1.04)}
  .logo-img{height:46px;width:auto;display:block}
  .nav-links{display:flex;align-items:center;gap:clamp(16px,2vw,28px)}
  .nav-links > a,.nav-links > .has-drop > a{font-family:var(--body);font-weight:500;font-size:.95rem;color:var(--ink-soft);transition:color .2s;position:relative;white-space:nowrap;cursor:pointer}
  .nav-links > a:hover,.has-drop:hover > a{color:var(--ink)}
  .nav-links > a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:width .25s;border-radius:2px}
  .nav-links > a:hover::after{width:100%}
  .has-drop{position:relative}
  .has-drop > a::after{content:"▾";font-size:.6rem;margin-left:5px;opacity:.6;display:inline-block;transition:transform .25s}
  .has-drop:hover > a::after{transform:rotate(180deg)}
  .drop{position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(10px);background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-md);padding:10px;width:300px;opacity:0;visibility:hidden;transition:.3s cubic-bezier(.2,.8,.2,1);display:grid;gap:2px}
  .has-drop:hover .drop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
  .drop::before{content:"";position:absolute;top:-14px;left:0;right:0;height:14px}
  .drop a{display:flex;align-items:center;gap:11px;padding:11px 13px;border-radius:11px;font-size:.9rem;font-weight:500;color:var(--ink-soft);transition:background .2s,color .2s,transform .2s}
  .drop a:hover{background:var(--mist);color:var(--blue);transform:translateX(3px)}
  .drop a .di{width:30px;height:30px;border-radius:8px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;flex-shrink:0}
  .drop a .di svg{width:16px;height:16px}
  .nav-cta{display:flex;align-items:center;gap:12px}
  .menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px;-webkit-tap-highlight-color:transparent}
  .menu-btn span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
  .menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-btn.open span:nth-child(2){opacity:0}
  .menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  
  /* mobile nav */
  .mnav{position:fixed;inset:0;background:var(--navy);color:#fff;z-index:199;transform:translateX(100%);transition:transform .45s cubic-bezier(.2,.8,.2,1);padding:90px 28px 40px;overflow-y:auto}
  .mnav.open{transform:none}
  .mnav a{display:block;font-family:var(--disp);font-size:1.15rem;font-weight:500;color:#fff;padding:14px 0;border-bottom:1px solid var(--line-d)}
  .mnav .sub{font-size:.95rem;color:rgba(255,255,255,.62);padding:9px 0 9px 16px;border:none;font-family:var(--body)}
  .mnav details summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--disp);font-size:1.15rem;font-weight:500;padding:14px 0;border-bottom:1px solid var(--line-d)}
  .mnav details summary::-webkit-details-marker{display:none}
  .mnav details summary::after{content:"+";font-size:1.3rem;opacity:.6}
  .mnav details[open] summary::after{content:"–"}
  .mnav .btn{margin-top:22px;width:100%}

  
  /* footer */
  footer{background:var(--navy);color:rgba(255,255,255,.66);padding:clamp(50px,7vw,74px) 0 28px;position:relative;overflow:hidden}
  footer .aurora{filter:blur(80px);opacity:.32}
  .foot-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:clamp(30px,4vw,44px);margin-bottom:44px}
  .foot-brand .logo-img{height:50px;margin-bottom:18px}
  .foot-brand p{font-size:.94rem;line-height:1.65;max-width:320px;margin-bottom:20px}
  .foot-social{display:flex;gap:10px}
  .foot-social a{width:40px;height:40px;border-radius:11px;background:rgba(255,255,255,.07);display:grid;place-items:center;transition:background .25s,transform .25s}
  .foot-social a:hover{background:var(--grad);transform:translateY(-3px)}
  .foot-social a svg{width:18px;height:18px;color:#fff}
  .foot-col h5{color:#fff;font-family:var(--disp);font-weight:600;font-size:.92rem;margin-bottom:18px}
  .foot-col a{display:block;font-size:.92rem;margin-bottom:11px;transition:color .2s,padding-left .2s}
  .foot-col a:hover{color:var(--sky);padding-left:5px}
  .foot-contact .row{display:flex;gap:11px;margin-bottom:14px;font-size:.92rem;line-height:1.5}
  .foot-contact .row .ic{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.07);display:grid;place-items:center;flex-shrink:0;color:var(--sky)}
  .foot-contact .row .ic svg{width:16px;height:16px}
  .foot-contact a{color:rgba(255,255,255,.66)}
  .foot-contact a:hover{color:var(--sky)}
  .foot-bottom{position:relative;z-index:2;border-top:1px solid var(--line-d);padding-top:24px;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;font-size:.86rem}
  .foot-bottom b{color:#fff;font-weight:600}

  
  /* common header/footer extensions */
  header#header{background:transparent}
  header#header .nav{flex-wrap:nowrap}
  header#header .logo-img{height:46px}
  header#header.scrolled .logo-img{height:46px}
  header#header.scrolled{padding:0}
  .nav-links{gap:clamp(10px,1.5vw,22px)}
  .nav-links > a,.nav-links > .has-drop > a{padding:0;border-radius:0;background:transparent}
  .nav-links > a:hover,.has-drop:hover > a,.nav-links > a.active,.has-drop > a.active{background:transparent}
  .nav-links > a.active,.has-drop > a.active{color:var(--blue)}
  .nav-links > a.active::after{width:100%}
  .has-drop > a::after{content:"\25be";font-size:.6rem;margin-left:5px;opacity:.6;display:inline-block;width:auto;height:auto;border:none;transform:none;transition:transform .25s}
  .has-drop:hover > a::after{transform:rotate(180deg)}
  .drop{width:300px;min-width:0}
  .drop a.active{background:var(--mist);color:var(--blue)}
  .drop .dlabel{display:block;font-size:.68rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);padding:10px 13px 4px}
  .drop a.dsub{padding-left:26px}
  .drop a.dsub .di{width:26px;height:26px}
  .drop.drop-lg{width:640px;display:flex;gap:8px;padding:12px}
  .drop.drop-lg .dcol{display:grid;gap:2px;flex:1;align-content:start}
  .has-drop.drop-right .drop{left:auto;right:-10px;transform:translateX(0) translateY(10px)}
  .has-drop.drop-right:hover .drop{transform:translateX(0) translateY(0)}
  .nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
  .nav-right .btn{padding:11px 22px;font-size:.9rem}
  .mnav{z-index:1190}
  header#header{z-index:1200}
  .mnav .mnav-brands{padding-left:16px}
  @media(max-width:1250px){.nav-links{display:none}.menu-btn{display:flex}}
  @media(max-width:520px){.nav-right .btn{padding:10px 16px;font-size:.84rem}}
  .page-hero{padding-top:clamp(56px,7vw,92px)}