:root{--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--bg-primary:#f8fafc;--bg-card:#fff;--text-main:#0f172a;--text-muted:#64748b;--text-light:#94a3b8;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#eff6ff;--danger:#ef4444;--danger-light:#fef2f2;--success:#10b981;--success-light:#ecfdf5;--border:#e2e8f0;--radius-lg:16px;--radius-md:12px;--radius-sm:8px;--shadow:0 10px 15px -3px #0f172a0d, 0 4px 6px -4px #0f172a0d;--shadow-lg:0 20px 25px -5px #0f172a14, 0 8px 10px -6px #0f172a14}@media (prefers-color-scheme:dark){:root{--bg-primary:#0b0f19;--bg-card:#151f32;--text-main:#f8fafc;--text-muted:#94a3b8;--text-light:#64748b;--primary:#3b82f6;--primary-hover:#2563eb;--primary-light:#3b82f61a;--border:#223049;--shadow:0 10px 15px -3px #0000004d;--shadow-lg:0 20px 25px -5px #0006}}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}.app-container{flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:16px;display:flex}.card{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:480px;box-shadow:var(--shadow);padding:28px 24px}.header{text-align:center;margin-bottom:24px}.logo{color:var(--primary);letter-spacing:-.025em;justify-content:center;align-items:center;gap:8px;margin-bottom:4px;font-size:24px;font-weight:800;display:flex}.subtitle{color:var(--text-muted);font-size:13px}h2{letter-spacing:-.02em;margin-bottom:16px;font-size:20px;font-weight:700}.form-group{margin-bottom:20px}.form-label{color:var(--text-muted);margin-bottom:8px;font-size:13px;font-weight:600;display:block}.input-container{align-items:center;display:flex;position:relative}.input-icon{color:var(--text-light);align-items:center;display:flex;position:absolute;left:14px}.input-field{border:1px solid var(--border);border-radius:var(--radius-md);width:100%;color:var(--text-main);background-color:#0000;outline:none;padding:12px 14px;font-family:inherit;font-size:16px;transition:border-color .15s,box-shadow .15s}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.input-with-icon{padding-left:40px}.input-unit{color:var(--text-muted);font-size:14px;font-weight:600;position:absolute;right:14px}.input-with-unit{padding-right:40px}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;width:100%;padding:14px 20px;font-size:15px;font-weight:600;transition:background-color .15s,transform .1s;display:inline-flex}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn-primary:active:not(:disabled){transform:scale(.99)}.btn:disabled{background-color:var(--border);color:var(--text-light);cursor:not-allowed}.btn-secondary{border:1px solid var(--border);color:var(--text-muted);background-color:#0000}.btn-secondary:hover:not(:disabled){background-color:var(--primary-light);border-color:var(--primary);color:var(--primary)}.tip-grid{grid-template-columns:repeat(3,1fr);gap:8px;margin-top:8px;display:grid}.tip-button{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;background-color:#0000;padding:12px 6px;font-size:14px;font-weight:600;transition:all .15s}.tip-button:hover{border-color:var(--primary);background-color:var(--primary-light);color:var(--primary)}.tip-button.active{border-color:var(--primary);background-color:var(--primary);color:#fff}.alert{border-radius:var(--radius-md);align-items:flex-start;gap:8px;margin-bottom:20px;padding:12px 16px;font-size:13px;display:flex}.alert-success{background-color:var(--success-light);color:#065f46;border:1px solid #10b98126}.alert-danger{background-color:var(--danger-light);color:#991b1b;border:1px solid #ef444426}.result-box{background-color:var(--primary-light);border:1px dashed var(--primary);border-radius:var(--radius-md);text-align:center;margin-bottom:20px;padding:16px}.result-label{color:var(--primary);text-transform:uppercase;letter-spacing:.05em;font-size:12px;font-weight:700}.result-value{color:var(--text-main);margin:4px 0;font-size:28px;font-weight:800}.share-section{border-top:1px solid var(--border);margin-top:24px;padding-top:20px}.share-link-box{background-color:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-md);align-items:center;margin-bottom:12px;padding:6px 6px 6px 12px;display:flex}.share-link-text{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;-webkit-user-select:all;user-select:all;flex:1;font-size:13px;overflow:hidden}.btn-copy{width:auto;padding:8px 12px;font-size:12px}.flex-between{justify-content:space-between;align-items:center;display:flex}.margin-top-md{margin-top:16px}.text-center{text-align:center}.text-muted{color:var(--text-muted);font-size:13px}.loader{border:3px solid var(--border);border-top:3px solid var(--primary);border-radius:50%;width:24px;height:24px;animation:1s linear infinite spin;display:inline-block}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}