/* The objective takes one row; puzzle actions share the existing footer. */
#puzzle-card,#puzzle-chooser,.puzzle-info{--puzzle-win:#2f9e62;--puzzle-win2:#3a7bd5;--puzzle-defend:#d0782c;--puzzle-wrong:#c8453b}
#puzzle-card{position:relative;flex:none;box-sizing:border-box;margin:6px 6px 4px;padding:0 8px 0 12px;z-index:5;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--ink);font-family:inherit;font-size:14px;line-height:1.4}
#puzzle-card[hidden],#puzzle-card [hidden],#puzzle-actions[hidden],#puzzle-actions [hidden]{display:none!important}
.puzzle-head{margin-right:76px;display:flex;align-items:center;gap:6px;min-height:44px}
.puzzle-title{flex:1;min-width:0;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.puzzle-title strong{font-size:14px;font-weight:650}.puzzle-meta{font-size:13px;color:var(--muted)}
.puzzle-done{font-size:13px;color:var(--accent)}
.puzzle-icon{width:44px;height:44px;min-height:44px;display:grid;place-items:center;flex:none;padding:0;border:0;border-radius:8px;background:transparent;color:var(--muted);cursor:pointer}
.puzzle-icon[data-expanded=true] svg{transform:rotate(-90deg)}
.puzzle-icon[data-expanded=false] svg{transform:rotate(90deg)}
#puzzle-card p{margin:0 0 8px;font-size:14px;line-height:1.4}
#puzzle-card .puzzle-feedback{font-weight:600;outline:none}#puzzle-card[data-status=wrong]{border-color:var(--puzzle-wrong)}
#puzzle-card .puzzle-hint{color:var(--ink)}
#puzzle-card svg,#puzzle-actions svg,#puzzle-chooser svg,.puzzle-info svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
#puzzle-actions{display:flex;gap:4px;width:100%;align-items:center;justify-content:center}
.puzzle-action{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:9px;background:transparent;color:var(--ink);font:inherit;font-size:14px;cursor:pointer}
#puzzle-actions .puzzle-action{flex:1;border:0;flex-direction:column;gap:2px;padding:4px;min-height:48px;font-size:14px;line-height:1.2}
.puzzle-action.primary{background:var(--accent);color:var(--panel)}
#puzzle-actions .puzzle-action[aria-pressed=true]{background:var(--ink);color:var(--panel)!important;box-shadow:inset 0 0 0 2px var(--ink)}
.puzzle-reveal{display:inline-flex;align-items:center;min-height:36px;margin:0 0 8px;padding:5px 10px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--ink);font:inherit;font-size:13px;font-weight:600;line-height:1.3;cursor:pointer}
.puzzle-reveal.armed{border-color:var(--ink);background:var(--ink);color:var(--panel)}
.puzzle-action:disabled{opacity:.4;cursor:default}
.puzzle-action:focus-visible,.puzzle-icon:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
body.puzzle-mode #phone-actions,body.puzzle-mode .footer-panels,body.puzzle-mode #history-toggle{display:none!important}
.puzzle-info{box-sizing:border-box;width:min(480px,calc(100% - 24px));max-height:calc(100% - 32px);padding:16px;border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--ink);overflow:auto;font-size:16px;line-height:1.5}
.puzzle-info::backdrop{background:#0006}.puzzle-info h2{font-size:20px;margin:0}.puzzle-info .puzzle-details{margin-top:16px;font-size:14px}.puzzle-info summary{cursor:pointer;min-height:44px;line-height:44px}
body[data-landscape=true] #puzzle-card{max-width:600px}
body[data-screen=desktop] .puzzle-head{margin-right:0}
body[data-landscape=true] #puzzle-actions{flex-wrap:wrap}body[data-landscape=true] #puzzle-actions .puzzle-action{flex-basis:40%;min-height:44px}
/* A stable objective band: expanding a hint never resizes or turns the camera. */
body[data-screen=mobile].puzzle-mode .board-wrap{margin-top:96px}
body[data-screen=mobile] #puzzle-card{position:absolute;top:6px;left:6px;right:6px;margin:0;max-height:180px;overflow:auto;overscroll-behavior:contain}
body[data-screen=mobile][data-landscape=true].puzzle-mode .board-wrap{margin-top:80px}
body[data-screen=desktop] #puzzle-card{margin:0 0 4px;padding:0 6px;border:0;border-bottom:1px solid var(--line);border-radius:0;background:transparent}
/* A compact collection browser; Next loads a board instead of opening this. */
#puzzle-chooser{box-sizing:border-box;width:min(620px,calc(100% - 24px));max-height:calc(100dvh - 32px);padding:20px;border:1px solid var(--line);border-radius:18px;background:var(--panel);color:var(--ink);overflow:auto;overscroll-behavior:contain;scrollbar-width:thin}
#puzzle-chooser::backdrop{background:#0007}
.puzzle-chooser-head{display:flex;align-items:center;gap:12px}
.puzzle-chooser-head h2{flex:1;margin:0;font-size:22px;font-weight:650}
.puzzle-chooser-head .puzzle-icon{width:40px;height:40px;min-height:40px}
.puzzle-chooser-intro{margin:0 0 12px;font-size:14px;line-height:1.4;color:var(--muted)}
.puzzle-collection-count{margin:12px 0 8px;font-size:14px;font-weight:600;color:var(--muted)}
.puzzle-collection-progress{display:block;width:100%;height:5px;accent-color:var(--accent)}
.puzzle-filters{display:flex;gap:8px;margin:16px 0 20px}
.puzzle-filters select{flex:1;min-width:0;min-height:44px;font:inherit;font-size:14px;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:9px;padding:8px}
.puzzle-tier{margin:0 0 20px}
.puzzle-tier h3{margin:0 0 10px;font-size:14px;font-weight:600;color:var(--muted)}
.puzzle-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
.puzzle-grid .puzzle-cell{display:flex;align-items:center;gap:10px;min-width:0;min-height:54px;padding:8px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);font:inherit;font-size:14px;text-align:left;cursor:pointer}
.puzzle-cell .puzzle-number{display:grid;place-items:center;flex:none;width:32px;height:32px;border-radius:7px;background:color-mix(in srgb,var(--ink) 7%,transparent);font-size:14px;font-weight:600;font-variant-numeric:tabular-nums}
.puzzle-cell>span{flex:1;min-width:0}
.puzzle-cell small{flex:none;font-size:12px;color:var(--muted)}
.puzzle-cell:is(:hover,:focus-visible){border-color:var(--ink);background:color-mix(in srgb,var(--ink) 7%,var(--panel))}
.puzzle-cell[aria-current=true]{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.puzzle-cell[data-solved] .puzzle-number{background:var(--ink);color:var(--panel)}
.puzzle-cell[data-revealed]{border-style:dashed}
@media(max-width:480px){#puzzle-chooser{padding:16px}.puzzle-chooser-head h2{font-size:20px}.puzzle-grid{grid-template-columns:1fr}}

body.puzzle-mode .board-footer .footer-actions{display:flex!important;width:100%!important;min-width:0!important}
body.puzzle-mode .board-footer .footer-actions #puzzle-actions{flex:1;min-width:0;max-width:100%}
html body.compact-controls[data-screen].puzzle-mode .board-footer .footer-actions #puzzle-actions .puzzle-action{display:flex;flex:1;flex-direction:column;width:auto;height:48px;min-height:48px;gap:2px;color:var(--ink)}
html body.compact-controls[data-screen].puzzle-mode .board-footer .footer-actions #puzzle-actions .puzzle-action.primary{background:var(--accent);color:var(--panel)}
html body.compact-controls[data-screen][data-landscape=true].puzzle-mode .board-footer .footer-actions #puzzle-actions .puzzle-action{flex:1 1 40%}
/* Focus changes must not scroll this fixed board surface during rotation. */
html body.puzzle-mode>.playground{overflow:clip}