/* Shared product-family header: one row, white surface, dark actions. */
header{display:flex;flex-wrap:nowrap;align-items:center;justify-content:space-between;gap:22px;min-height:88px;padding:16px 32px;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
header .brand{flex-shrink:0;font-size:26px;gap:10px;letter-spacing:-1.3px}header .brand small{display:block;font-size:9px;letter-spacing:1.7px}header .brand-icon{font-size:38px;margin-right:5px}header nav{display:flex;order:0;width:auto;flex:1;justify-content:center;align-items:center;gap:18px;padding:0;font-size:14px;white-space:nowrap}header nav a{padding:8px 0;line-height:1.4}header nav a:hover{color:var(--teal)}header .header-actions{display:flex;align-items:center;gap:16px;margin-left:0;flex-shrink:0}header .header-actions .login-link{display:inline-flex;align-items:center;min-height:44px;border:0;padding:10px 3px;border-radius:0;font-size:14px;font-weight:600}header .header-actions .button{min-height:48px;padding:12px 20px;border-radius:6px;white-space:nowrap}header .mobile-login,header .menu{display:none}
@media(min-width:1600px){header{padding-left:calc((100vw - 1500px)/2);padding-right:calc((100vw - 1500px)/2)}}
@media(max-width:1399px){header{flex-wrap:wrap;min-height:78px;padding:14px 24px;gap:12px}header .brand{font-size:25px}header .header-actions{display:none}header .mobile-login{display:inline-flex;align-items:center;justify-content:center;margin-left:auto;background:var(--ink);color:white;padding:10px 16px;border-radius:6px;min-height:44px;font-size:14px;white-space:nowrap}header .menu{display:block;margin:0;min-width:44px;min-height:44px;border:0;background:transparent;color:var(--ink);font-size:25px}header nav{display:none;order:3;flex:auto;width:100%;white-space:normal;align-items:stretch;gap:0;padding:12px 0 4px;border-top:1px solid var(--line)}header.open nav{display:flex;flex-direction:column;max-height:calc(100dvh - 100px);overflow-y:auto}header nav a{display:block;width:100%;min-height:44px;padding:12px 5px;font-size:16px}}
@media(max-width:480px){header{padding:12px;gap:8px;min-height:72px}header .brand{font-size:22px;letter-spacing:-1px;gap:4px}header .brand-icon{font-size:30px;margin-right:4px}header .brand small{font-size:8px;letter-spacing:1px}header .mobile-login{padding:8px 12px}header .menu{font-size:24px}}
@media(max-width:360px){header .brand{font-size:20px}header .brand small{display:none}header .brand-icon{font-size:27px}}
/* Sign-in is a visible button on desktop and mobile. */
header .header-actions .login-link{justify-content:center;min-height:48px;padding:12px 20px;border:1px solid var(--teal);border-radius:6px;background:var(--teal);color:#fff;font-weight:700;white-space:nowrap;transition:background .2s}
header .header-actions .login-link:hover,header .mobile-login:hover{background:#08645f;border-color:#08645f;color:#fff}
header .mobile-login{background:var(--teal);border:1px solid var(--teal);font-weight:700}