:root{--bg: #f5f5f0;--surface: #ffffff;--accent: #c0392b;--text: #1a1a1a;--text-secondary: #777;--radius: 8px;--max-width: 680px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Inter,system-ui,sans-serif;font-size:16px;line-height:1.5;min-height:100dvh}#root{min-height:100dvh}.app{position:relative;max-width:var(--max-width);margin:0 auto;height:100dvh;display:flex;flex-direction:column;padding:0 1.5rem 5rem;overflow:hidden}.app-loading,.app-error{display:flex;align-items:center;justify-content:center;min-height:100dvh;color:var(--text-secondary)}.mute-btn{position:fixed;top:1rem;right:1rem;background:none;border:none;color:inherit;font-size:1.25rem;cursor:pointer;padding:.5rem;min-width:48px;min-height:48px;display:flex;align-items:center;justify-content:center;z-index:10;opacity:.6;transition:opacity .15s}.mute-btn:hover{opacity:1}.status-bar{display:flex;gap:1.5rem;padding:1rem 0 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1rem 1.25rem}.btn{font-size:1rem}.idle-screen{padding:2rem 0}.workout-title{font-size:1.6rem}}