*,*:before,*:after{box-sizing:border-box}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:#1f2933;background-color:#f0f2f5;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;justify-content:center;min-height:100vh;background-color:#f0f2f5;color:#333}.main-container{width:100%;max-width:1280px;padding:1rem;display:flex;flex-direction:column;align-items:center;box-sizing:border-box;margin:0 auto}.header{text-align:center;margin-bottom:2rem}.strava-connect-btn{height:48px;width:auto;transition:transform .2s}.strava-connect-btn:hover{transform:scale(1.05)}.stats-container{width:100%}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(380px,1fr));gap:2rem;width:100%}.stat-card{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 4px 6px #0000001a;transition:transform .2s;display:flex;flex-direction:column}.stat-card:hover{transform:translateY(-5px)}.chart-container{margin-top:1.5rem}.error-message{color:#d9534f}.footer{margin-top:2rem;text-align:center}.footer img{height:40px;opacity:.8}