.header{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:14px 16px;border-bottom:1px solid rgba(200,16,46,.1);background:#ffffffe6;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 10px 34px #1d23300f;font-size:14px}.brand{display:inline-flex;align-items:center;color:var(--alumni-ink);text-decoration:none}.brand__logo{display:block;width:min(228px,54vw);height:auto;image-rendering:-webkit-optimize-contrast;image-rendering:crisp-edges;backface-visibility:hidden;transform:translateZ(0)}.login-brand__logo{width:min(290px,64vw)}.header-login{display:inline-flex;align-items:center;gap:10px}.header-login__hint{display:none;color:var(--alumni-muted);line-height:1.3;font-size:14px;display:inline}.header-login-link{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 16px;border:1px solid rgba(200,16,46,.16);border-radius:12px;color:var(--alumni-red);background:#fff;font-family:var(--alumni-heading-font);font-size:16px;font-weight:700;text-decoration:none;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease}.header-login-link:hover{transform:translateY(-1px);border-color:#c8102e47;box-shadow:0 12px 24px #1d233014}.app-nav{width:100%}.app-nav__inner{max-width:1440px;margin:0 auto}.app-nav__row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}.app-nav__left{display:flex;align-items:center;gap:clamp(18px,3vw,34px);min-width:0}.app-nav__brand-wrap{display:flex;align-items:center;flex:0 0 auto}.app-nav__links{align-items:center}.app-nav__actions{gap:12px}.app-nav__mobile{margin-top:8px}.app-nav__mobile-panel{overflow:hidden;border:1px solid rgba(223,228,236,.95);border-radius:22px;background:#fffffff5;box-shadow:0 20px 48px #1d233014}@media(min-width:640px){.header{padding-inline:22px}.app-page-header__inner{padding:12px 20px 0}}@media(min-width:768px){.header{padding-inline:28px}.app-page-header__inner{padding:14px 24px 0}}@media(min-width:1024px){.header{padding-inline:40px}.app-page-header__inner{padding:16px 32px 0}}@media(min-width:1280px)and (max-width:1599px){.header{padding:18px 32px}}@media(min-width:1600px)and (max-width:1919px){.header{padding:20px 40px}}