.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background-color:var(--bg-white);border-bottom:1px solid var(--border-color);z-index:var(--z-header)}.header-content{display:flex;justify-content:space-between;align-items:center;height:100%}.header-logo{font-size:1.25rem;font-weight:700;color:var(--text-dark)}.logo-accent{color:var(--primary-text)}.header-link{font-size:.75rem;color:var(--text-gray);padding:8px 16px;border:1px solid var(--border-color);border-radius:var(--radius-sm);transition:all .2s ease}.header-link:hover{background-color:var(--bg-light);opacity:1}.header-nav{display:flex;align-items:center;gap:32px}.header-nav-link{font-size:.8125rem;color:var(--text-dark);transition:color .2s ease}.header-nav-link:hover{color:var(--primary-text);opacity:1}.hamburger-menu{position:relative;display:flex;align-items:center;gap:12px}.header-theme-btn{background:0 0;border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;padding:4px 8px;font-size:1rem;line-height:1;transition:border-color .2s,background-color .2s;color:var(--text-dark)}.header-theme-btn:hover{border-color:var(--primary-color);background-color:var(--bg-cream)}.header-theme-icon{display:none}.hamburger-btn{display:flex;flex-direction:column;justify-content:space-between;width:24px;height:18px;padding:0;background:0 0;border:none;cursor:pointer;z-index:var(--z-modal)}.hamburger-btn span{display:block;width:100%;height:2px;background-color:var(--text-dark);border-radius:1px;transition:all .3s ease}.hamburger-btn.active span:first-child{transform:translateY(8px) rotate(45deg)}.hamburger-btn.active span:nth-child(2){opacity:0}.hamburger-btn.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.hamburger-dropdown{display:none;position:absolute;top:calc(100% + 12px);right:0;min-width:220px;background-color:var(--bg-white);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);z-index:var(--z-modal-bg);opacity:0;transform:translateY(-10px);transition:opacity .2s ease,transform .2s ease}.hamburger-dropdown.active{display:block;opacity:1;transform:translateY(0)}.hamburger-dropdown-content{padding:12px 0;max-height:calc(100vh - 120px);overflow-y:auto}.hamburger-dropdown-item{display:block;padding:12px 20px;font-size:.875rem;color:var(--text-dark);text-decoration:none;transition:background-color .2s ease}.hamburger-dropdown-item:hover{background-color:var(--bg-light);opacity:1}.hamburger-dropdown-item:active{background-color:var(--border-color)}.hamburger-dropdown-item.nav-current{color:var(--primary-text);font-weight:600;background-color:var(--bg-light);pointer-events:none}.hamburger-dropdown-item.nav-current::after{content:' ✓';font-size:.75em;opacity:.7}.hamburger-dropdown-item--highlight{color:var(--primary-text);font-weight:500}.menu-unread-badge{display:inline-block;background-color:var(--unread-badge-bg);color:var(--unread-badge-color);font-size:.7rem;font-weight:700;line-height:1;padding:2px 6px;border-radius:var(--radius-base);margin-inline-start:6px;vertical-align:middle}.hamburger-dropdown-divider{height:1px;background-color:var(--border-color);margin:8px 0}@media (min-width:769px){.header-nav>.header-link,.header-nav>.header-nav-link{display:inline-block}}.header-nav-link--active{color:var(--primary-text);font-weight:500;position:relative}.header-nav-link--active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background-color:var(--primary-color);border-radius:1px}