.ptools-shell { position:sticky; top:0; z-index:60; display:flex; align-items:center; justify-content:space-between; flex-wrap:nowrap; gap:12px; min-height:56px; padding:4px max(12px,env(safe-area-inset-right)) 4px max(12px,env(safe-area-inset-left)); border-bottom:1px solid #dbe3ee; background:#fff; color:#172b4d; font:14px/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif; box-sizing:border-box; }
.ptools-shell * { box-sizing:border-box; }
.ptools-shell a { text-decoration:none; }
.ptools-shell .ptools-shell-brand { display:inline-flex; align-items:center; min-height:44px; color:#2457e6; font-size:20px; font-weight:850; }
.ptools-shell-actions { display:flex; align-items:center; gap:8px; }
.ptools-shell .ptools-shell-primary { display:inline-flex; align-items:center; min-height:44px; padding:8px 14px; border-radius:9px; color:#fff; background:#2457e6; font-weight:750; white-space:nowrap; }
.ptools-shell-primary:hover { background:#173aa9; }
.ptools-shell-menu { position:relative; }
.ptools-shell-menu > summary { display:flex; align-items:center; justify-content:center; gap:6px; min-width:44px; min-height:44px; padding:8px 10px; border:1px solid #dbe3ee; border-radius:9px; list-style:none; cursor:pointer; color:#31405b; background:#fff; font-weight:700; }
.ptools-shell-menu > summary::-webkit-details-marker { display:none; }
.ptools-shell-menu > summary > span:first-child { font-size:20px; line-height:1; }
.ptools-shell-nav { position:absolute; top:calc(100% + 6px); right:0; display:flex; flex-direction:column; align-items:stretch; width:min(280px,calc(100vw - 24px)); max-height:calc(100dvh - 74px); overflow:auto; overscroll-behavior:contain; padding:6px; border:1px solid #dbe3ee; border-radius:12px; background:#fff; box-shadow:0 12px 36px #172b4d25; }
.ptools-shell-nav > a { display:flex; align-items:center; flex-shrink:0; min-height:44px; padding:8px 12px; border-radius:7px; color:#31405b; font-size:14px; font-weight:600; }
.ptools-shell-nav > a:hover, .ptools-shell-nav > a:focus-visible { background:#edf3ff; color:#1747b3; }
.ptools-shell :focus-visible { outline:3px solid #92b0ff; outline-offset:2px; }
@media (max-width:600px) { .ptools-shell { min-height:52px; } .ptools-shell-menu-label { display:none; } .ptools-shell .ptools-shell-primary { padding-inline:10px; font-size:13px; } }
@media (orientation:landscape) and (max-height:500px) { .ptools-shell { position:relative; min-height:52px; } .ptools-shell-nav { max-height:calc(100dvh - 66px); } }
body.ptools-keyboard-open .ptools-shell { position:relative; }