:root{--paper: #f5f0e8;--paper-bright: #f5f0e8;--ink: #1a1a1a;--accent: #c5542a;--mono: "Courier New", Courier, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}html,body{height:100%;overflow-x:hidden}body{margin:0;font-family:var(--mono);color:var(--ink);background:var(--paper)}.app-root{min-height:100vh;min-height:100dvh;width:100%;position:relative}.sound-toggle{position:fixed;top:max(12px,env(safe-area-inset-top,0px));right:max(12px,env(safe-area-inset-right,0px));z-index:200;min-width:44px;min-height:44px;padding:8px 12px;border:1px solid var(--ink);background:var(--paper-bright);font-family:var(--mono);font-size:18px;line-height:1;cursor:pointer;color:var(--ink)}.toast{position:fixed;bottom:max(24px,env(safe-area-inset-bottom,0px));left:50%;transform:translate(-50%);z-index:201;padding:12px 18px;border:1px solid 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