.sheet{position:fixed;left:0;right:0;bottom:0;max-height:70dvh;z-index:30;border:1px solid var(--border);border-radius:20px 20px 0 0;background:var(--surface);padding:20px 16px calc(20px + env(safe-area-inset-bottom));overflow:auto;animation:sheet-in 240ms cubic-bezier(0.2,0.8,0.2,1);}
.sheet-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;}
.sheet-content{display:grid;gap:16px;}
.sheet-content p{line-height:1.7;}
.sheet-content code{display:block;padding:12px;background:var(--bg);border-radius:8px;}
.sheet-actions{display:flex;gap:8px;}
@media (min-width:768px){.sheet{left:auto;top:0;right:0;bottom:0;width:420px;max-height:100dvh;border-radius:16px 0 0 16px;}
}