.header{background:var(--color-ghost);border-bottom:1px solid var(--color-aqua-200);padding:1rem 0;position:sticky;top:0;z-index:100}@media (prefers-color-scheme: dark){.header{background:var(--color-gunmetal);border-bottom:1px solid var(--color-gunmetal-400)}}.header-content{max-width:1200px;margin:0 auto;padding:0 1rem;display:flex;justify-content:space-between;align-items:center}.logo-link{text-decoration:none;color:inherit;transition:opacity .2s ease}.logo-link:hover{opacity:.8}.logo-link h1{margin:0;font-size:2rem;font-weight:700;color:var(--color-gunmetal);cursor:pointer}@media (prefers-color-scheme: dark){.logo-link h1{color:var(--color-ghost)}}.header-buttons{display:flex;gap:.75rem;align-items:center}.header-btn{padding:.5rem 1rem;border:2px solid var(--color-aqua-400);background:transparent;color:var(--color-gunmetal);border-radius:.375rem;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease}.header-btn:hover{background:var(--color-aqua-400);color:#fff}.header-btn:focus{outline:2px solid var(--color-aqua-500);outline-offset:2px}.no-border{border:none}@media (prefers-color-scheme: dark){.header-btn{border-color:var(--color-aqua-300);color:var(--color-ghost)}.header-btn:hover{background:var(--color-aqua-300);color:var(--color-gunmetal)}}.app-footer{width:100%;background:var(--color-gunmetal);color:var(--color-ghost);padding:2rem 1rem 1rem;margin-top:auto}@media (prefers-color-scheme: dark){.app-footer{background:var(--color-gunmetal-200)}}.footer-content{max-width:1200px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:1rem;text-align:center}.footer-content p{margin:0;color:var(--color-ghost-600);font-size:.875rem}.footer-content nav{display:flex;gap:1.5rem}.footer-content nav a{color:var(--color-ghost);text-decoration:none;font-size:.875rem;transition:color .3s ease}.footer-content nav a:hover{color:var(--color-aqua);text-decoration:underline}@media (prefers-color-scheme: dark){.footer-content p{color:var(--color-ghost-500)}.footer-content nav a{color:var(--color-ghost-600)}.footer-content nav a:hover{color:var(--color-aqua-400)}}@media (max-width: 768px){.app-footer{padding:1.5rem 1rem 1rem}.footer-content{gap:.75rem}.footer-content nav{gap:1rem}}