body{margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:#f3f4f6;color:#1f2937;-webkit-font-smoothing:antialiased}#root{min-height:100vh;display:flex;flex-direction:column}.container{width:100%;max-width:600px;margin:0 auto;padding:40px 20px;flex:1;display:flex;flex-direction:column;justify-content:center}.calculator-card{background:#fff;padding:40px;border-radius:16px;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f}h1{font-size:28px;font-weight:800;text-align:center;margin-bottom:8px;color:#111827}.subtitle{text-align:center;color:#6b7280;margin-bottom:32px;font-size:15px}.form-group{margin-bottom:24px}.form-group label{display:block;font-size:14px;font-weight:600;color:#374151;margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.input-wrapper{position:relative}.form-input{width:100%;padding:12px 16px;font-size:16px;border:2px solid #e5e7eb;border-radius:8px;outline:none;transition:all .2s;box-sizing:border-box;font-family:inherit}.form-input:focus{border-color:#3b82f6;box-shadow:0 0 0 4px #3b82f61a}.form-input::placeholder{color:#9ca3af}.calculate-btn{width:100%;padding:16px;background:linear-gradient(135deg,#2563eb,#1d4ed8);color:#fff;border:none;border-radius:10px;font-size:18px;font-weight:700;cursor:pointer;transition:transform .1s,box-shadow .1s;margin-top:10px;box-shadow:0 4px 6px -1px #2563eb66}.calculate-btn:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #2563eb66}.calculate-btn:active{transform:translateY(0)}.result-box{margin-top:32px;padding:24px;background-color:#eff6ff;border:1px solid #bfdbfe;border-radius:12px;text-align:center;animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.result-label{color:#1e40af;font-size:14px;font-weight:600;text-transform:uppercase;margin-bottom:8px}.result-value{color:#1e3a8a;font-size:42px;font-weight:900}.app-footer{text-align:center;margin-top:40px;color:#9ca3af;font-size:13px;line-height:1.5}.app-footer a{color:#6b7280;text-decoration:none;margin:0 8px;transition:color .2s}color: #374151; } .dashboard-container{max-width:800px}.dashboard-header{text-align:center;margin-bottom:40px}.dashboard-header h1{font-size:36px;background:linear-gradient(135deg,#2563eb,#1d4ed8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}.dashboard-header p{color:#6b7280;font-size:18px}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px}.tool-card{background:#fff;padding:32px 24px;border-radius:16px;box-shadow:0 4px 6px -1px #0000001a;text-decoration:none;display:flex;flex-direction:column;align-items:center;transition:all .2s cubic-bezier(.4,0,.2,1);color:inherit;position:relative;overflow:hidden;border:1px solid rgba(229,231,235,.5)}.tool-card:hover{transform:translateY(-5px);box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}.tool-card.disabled{opacity:.7;cursor:default}.tool-card.disabled:hover{transform:none;box-shadow:0 4px 6px -1px #0000001a}.icon-wrapper{width:72px;height:72px;border-radius:20px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;color:#fff;box-shadow:0 4px 6px -1px #0000001a}.icon{font-size:36px}.tool-card h2{font-size:18px;font-weight:700;margin:0;color:#1f2937}.badge{position:absolute;top:12px;right:12px;background:#f3f4f6;color:#6b7280;font-size:11px;padding:4px 10px;border-radius:99px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.back-link{display:inline-flex;align-items:center;margin-bottom:24px;color:#6b7280;text-decoration:none;font-weight:600;font-size:14px;transition:color .2s}.back-link:hover{color:#2563eb}.stopwatch-display{font-size:64px;font-weight:800;text-align:center;font-variant-numeric:tabular-nums;color:#1f2937;margin:40px 0;font-family:Inter,monospace;letter-spacing:-2px}.stopwatch-controls{display:flex;gap:16px;justify-content:center}.control-btn{padding:12px 32px;border-radius:12px;border:none;font-weight:600;font-size:16px;cursor:pointer;transition:all .2s;box-shadow:0 1px 2px #0000000d}.control-btn:active{transform:translateY(1px)}.control-btn.start{background:#2563eb;color:#fff;box-shadow:0 4px 6px -1px #2563eb33}.control-btn.start:hover{background:#1d4ed8;box-shadow:0 6px 8px -1px #2563eb4d}.control-btn.stop{background:#ef4444;color:#fff;box-shadow:0 4px 6px -1px #ef444433}.control-btn.stop:hover{background:#dc2626;box-shadow:0 6px 8px -1px #ef44444d}.control-btn.reset{background:#f3f4f6;color:#374151}.control-btn.reset:hover{background:#e5e7eb}.from-blue-500{--tw-gradient-from: #3b82f6}.to-blue-700{--tw-gradient-to: #1d4ed8}.from-purple-500{--tw-gradient-from: #a855f7}.to-purple-700{--tw-gradient-to: #7e22ce}.from-green-500{--tw-gradient-from: #22c55e}.to-green-700{--tw-gradient-to: #15803d}.from-red-500{--tw-gradient-from: #ef4444}.to-red-700{--tw-gradient-to: #b91c1c}.from-yellow-500{--tw-gradient-from: #eab308}.to-yellow-700{--tw-gradient-to: #a16207}.bg-gradient-to-br{background-image:linear-gradient(135deg,var(--tw-gradient-from),var(--tw-gradient-to))}