header{z-index:100;background:var(--bg-surface);border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:sticky;top:0}nav{align-items:center;max-width:1100px;margin:0 auto;padding:1.1rem 1.5rem;display:flex}.logo{color:var(--text);letter-spacing:-.02em;flex:1;font-size:1.15rem;font-weight:700}.logo:hover{color:var(--accent);text-decoration:none}ul{flex:1;justify-content:center;gap:.5rem;list-style:none;display:flex}ul a{color:var(--text-muted);border-radius:6px;padding:.4rem .9rem;font-size:.95rem;transition:color .15s,background .15s;position:relative}ul a:hover{color:var(--text);background:var(--bg-hover,#80808014);text-decoration:none}ul a.active{color:var(--accent);font-weight:600}ul a.active:after{content:"";background:var(--accent);border-radius:2px;width:60%;height:2px;position:absolute;bottom:-1rem;left:50%;transform:translate(-50%)}.controls{flex:1;justify-content:flex-end;gap:.6rem;display:flex}.ctrl-btn{border:1px solid var(--border);cursor:pointer;width:2.2rem;height:2.2rem;color:var(--text-muted);background:0 0;border-radius:6px;justify-content:center;align-items:center;font-size:.85rem;transition:background .15s,color .15s,border-color .15s;display:flex}.ctrl-btn:hover{background:var(--bg-hover,#80808014);color:var(--text);border-color:var(--accent)}main{max-width:1100px;margin:0 auto;padding:1rem 1.5rem 2rem}.dropdown{display:inline-block;position:relative}.dropdown-trigger{cursor:pointer}.dropdown-menu{top:calc(100% + var(--spacing-1,.25rem));z-index:100;background-color:var(--bg-surface);border:1px solid var(--border);min-width:10rem;padding:var(--spacing-1,.25rem) 0;border-radius:6px;margin:0;list-style:none;position:absolute;right:0;box-shadow:0 2px 8px #0000001f}.dropdown-item{padding:var(--spacing-2,.5rem) var(--spacing-4,1rem);color:var(--text);cursor:pointer;font-size:.875rem}.dropdown-item:hover{background-color:var(--bg)}.dropdown-item-disabled{color:var(--text-muted);cursor:not-allowed}.dropdown-item-disabled:hover{background-color:#0000}.dropdown-divider{background-color:var(--border);height:1px;margin:var(--spacing-1,.25rem) 0}