Easier to dismiss popups: close button and swipe down

Sheets (including Now Playing) get a close button, an animated close and swipe-down on phones; lyrics and the visualizer close on swipe-down too.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/style.css

@@ -123,6 +123,8 @@ label { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 6px
   padding: 8px 16px calc(var(--sab) + 16px); transform: translateY(100%); transition: transform .22s ease; max-height: 85dvh; overflow-y: auto; }
 #sheet.on .scrim { opacity: 1; }
 #sheet.on .sheet { transform: none; }
+#sheet .sheetx { position: sticky; top: 0; float: right; z-index: 2; width: 36px; height: 36px; margin: 0 -6px 0 8px; background: var(--panel2); border-radius: 50%; } #sheet .sheetx svg { width: 18px; height: 18px; }
+#sheet .sheet { overscroll-behavior: contain; }
 #sheet .grip { width: 40px; height: 4px; border-radius: 2px; background: var(--line); margin: 4px auto 12px; }
 #sheet h3 { margin: 0 0 4px; font-size: 18px; word-break: break-all; }
 #sheet .list { background: var(--panel2); border: 0; margin-top: 8px; }
@@ -1070,11 +1072,11 @@ body.vizopen { overflow: hidden; }
 #devchip .btn { min-height: 34px; padding: 0 14px; border-radius: 18px; } .devwho { display: flex; align-items: center; gap: 6px; } .devkid { font-style: normal; background: #2f9e6e; color: #fff; border-radius: 8px; padding: 1px 7px; font-size: 11px; font-weight: 700; }
 
 .crtick { position: absolute; top: 0; width: 2px; height: 100%; background: var(--text); opacity: .55; } .crearn { display: flex; align-items: center; gap: 10px; margin: 6px 0 0 52px; padding: 8px 10px; border-radius: 12px; background: var(--panel2); } .crearn .btn { min-height: 34px; padding: 0 12px; }
-.crdet { margin: 6px 0 0 52px; } .crdet summary { cursor: pointer; color: var(--muted); font-size: 14px; } .crwk { padding: 8px 0; border-bottom: 1px solid var(--line); } .crwk:last-child { border-bottom: 0; }
-
 .crtick.goal { width: 4px; background: var(--accent); opacity: 1; }
 .crgoal { display: flex; align-items: center; gap: 12px; margin: 8px 0 4px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); } .crgoal .crgi { font-size: 26px; } .crgoal .grow { min-width: 0; } .crgoal b, .crgoal small { display: block; } .crgoal small { color: var(--muted); }
 .crgoalbtn { margin: 4px 0 0 52px; min-height: 36px; font-size: 14px; }
+.crdet { margin: 6px 0 0 52px; } .crdet summary { cursor: pointer; color: var(--muted); font-size: 14px; } .crwk { padding: 8px 0; border-bottom: 1px solid var(--line); } .crwk:last-child { border-bottom: 0; }
+
 #kidreq { position: fixed; left: 12px; bottom: calc(env(safe-area-inset-bottom, 0px) + 74px + var(--playerh, 0px)); z-index: 55; min-height: 40px; padding: 0 16px; border-radius: 22px; border: 1px solid var(--line); background: var(--panel); color: var(--text); font: inherit; font-weight: 600; box-shadow: 0 4px 14px rgba(0,0,0,.3); cursor: pointer; }
 @media (min-width: 900px) { #kidreq { bottom: calc(16px + var(--playerh, 0px)); left: 236px; } }