:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--primary: #646cff;--bg-dark: #242424;--card-bg: #1a1a1a;--text-main: rgba(255, 255, 255, .87);--success: #4caf50;--danger: #f44336}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background-color:var(--bg-dark);color:var(--text-main);font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif}#root{width:100%;max-width:1280px;margin:0 auto;text-align:center}.app-container{width:100%;padding:2rem}.app-header h1{font-size:2.5em;line-height:1.1;margin-bottom:2rem;background:linear-gradient(to right,#646cff,#9f5afd);-webkit-background-clip:text;background-clip:text;color:transparent}.home-layout{display:grid;gap:2rem;grid-template-columns:1fr;max-width:800px;margin:0 auto}@media(min-width:768px){.home-layout{grid-template-columns:1fr 1.5fr}}.card{background:var(--card-bg);padding:2em;border-radius:12px;box-shadow:0 4px 6px #0000004d;text-align:left}.start-card h2{margin-top:0}.input-group{margin:1.5rem 0;display:flex;flex-direction:column;gap:.5rem}select{padding:.8em;border-radius:8px;border:1px solid #444;background:#333;color:#fff;font-size:1rem}.active-card{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px}.timer-display{font-size:5rem;font-weight:700;font-variant-numeric:tabular-nums;margin:1rem 0;color:var(--primary)}.pulsing-dot{width:12px;height:12px;background-color:var(--danger);border-radius:50%;animation:pulse 1s infinite;margin-bottom:1rem}@keyframes pulse{0%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.2)}to{opacity:1;transform:scale(1)}}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:2rem}.stat-card{background:#2a2a2a;padding:1rem;border-radius:8px;text-align:center}.stat-card h4{margin:0;font-size:.8rem;color:#888}.stat-card p{margin:.5rem 0 0;font-size:1.2rem;font-weight:700}.insights-panel{background:linear-gradient(135deg,#2a2a2a,#333);padding:1.5rem;border-radius:12px;border-left:4px solid var(--primary);margin-bottom:2rem}.insights-panel h3{margin-top:0}.history-list{list-style:none;padding:0;margin:0;max-height:300px;overflow-y:auto}.history-item{display:flex;justify-content:space-between;align-items:center;padding:.8rem;border-bottom:1px solid #333}.history-info{display:flex;gap:1rem;align-items:center}.history-type{font-weight:700;color:var(--primary);width:80px}.history-time{font-family:monospace}.history-date{font-size:.8rem;color:#666}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;cursor:pointer;transition:border-color .25s}.btn-primary{background-color:var(--primary);color:#fff;width:100%}.btn-danger{background-color:var(--danger);color:#fff;padding:1em 3em;font-size:1.2rem}.btn-icon{background:transparent;color:#666;padding:.2em .6em}.btn-icon:hover{color:var(--danger);background:#333}