.du-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px;max-width:1440px;margin:auto;background:white;border-bottom:1px solid #e0e7ec;font:16px/1.5 system-ui}.du-header a{text-decoration:none;color:#285baf}.du-brand img{max-width:160px;max-height:64px;object-fit:contain}.du-brand{font-weight:bold;font-size:24px}.du-nav{display:flex;gap:18px;flex-wrap:wrap;align-items:center}.du-header-toggle{display:none}@media(max-width:1000px){.du-header{flex-wrap:wrap}.du-header-toggle{display:block!important}.du-nav{display:none;width:100%}.du-nav.is-open{display:flex}}
/* v112: public navigation follows the signed-in workspace; classroom headers retain their own layout. */
.du-header:not(.dtcw-header){gap:16px;padding:16px 24px;align-items:center}
.du-header:not(.dtcw-header) .du-brand{flex:none;letter-spacing:-.02em;color:#214f43}
.du-header:not(.dtcw-header) .du-brand img{max-width:150px;max-height:52px}
.du-header:not(.dtcw-header) .du-nav{gap:6px 8px;font-size:14px;line-height:1.45}
.du-header:not(.dtcw-header) .du-nav a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:9px 11px;border:1px solid transparent;border-radius:11px;color:#345563;transition:background .15s,border-color .15s}
.du-header:not(.dtcw-header) .du-nav a:hover,.du-header:not(.dtcw-header) .du-nav a[aria-current=page]{background:#eaf4ee;color:#225c47;border-color:#cce2d4}
.du-header:not(.dtcw-header) .du-nav .du-account-entry{font-weight:700;color:#245e49;background:#edf6ef;border-color:#cde2d1}
.du-header:not(.dtcw-header) .du-nav a:focus-visible,.du-header-toggle:focus-visible{outline:3px solid #80b7ab;outline-offset:3px}
.du-header:not(.dtcw-header) .du-header-toggle{min-height:44px;min-width:80px;border-radius:11px}
@media(max-width:1000px){.du-header:not(.dtcw-header){padding:14px 18px;gap:12px}.du-header:not(.dtcw-header) .du-nav.is-open{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:12px;background:#f5f8f4;border:1px solid #dce7de;border-radius:16px}.du-header:not(.dtcw-header) .du-nav a{min-height:44px;white-space:normal;text-align:center;background:white;border-color:#e0e9e1}.du-header:not(.dtcw-header) .du-nav .du-account-entry{grid-column:1/-1}.du-header:not(.dtcw-header) .du-nav{font-size:14px}}
@media(prefers-reduced-motion:reduce){.du-header:not(.dtcw-header) .du-nav a{transition:none}}