: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}}.app{max-width:800px;margin:0 auto;padding:2rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}h1{color:#333;text-align:center;margin-bottom:2rem;font-size:2.5rem}h2{color:#555;margin-bottom:1rem;font-size:1.5rem}h3{color:#666;margin-bottom:1rem}.time-display{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:2rem;border-radius:12px;margin-bottom:2rem;box-shadow:0 4px 15px #0000001a}.time-display h2{color:#fff;margin-top:0}.time-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;font-size:1.2rem}.time-row:last-child{margin-bottom:0}.label{font-weight:600}.time{font-family:Courier New,monospace;font-size:1.4rem;font-weight:700}.time.base8{color:gold;text-shadow:0 0 10px rgba(255,215,0,.3)}.converter{background:#f8f9fa;padding:2rem;border-radius:12px;margin-bottom:2rem;border:1px solid #e9ecef}.input-group{margin-bottom:1.5rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:600;color:#555}.input-group input{width:200px;padding:.75rem;border:2px solid #ddd;border-radius:8px;font-size:1rem;transition:border-color .3s ease}.input-group input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.result{display:flex;justify-content:space-between;align-items:center;background:#fff;padding:1rem;border-radius:8px;border:2px solid #667eea;font-size:1.2rem}.explanation{background:#fff;padding:2rem;border-radius:12px;border:1px solid #e9ecef;text-align:left}.explanation ul{list-style-type:none;padding:0}.explanation li{padding:.5rem 0;border-bottom:1px solid #f0f0f0}.explanation li:last-child{border-bottom:none}.explanation strong{color:#667eea;font-family:Courier New,monospace}.explanation p{margin:1rem 0;color:#666;font-style:italic}@media (max-width: 600px){.app{padding:1rem}.time-row,.result{flex-direction:column;gap:.5rem;text-align:center}}