:root{--bg-app: #0f172a;--bg-card: #1e293b;--bg-input: #0f172a;--bg-hover: #334155;--text-main: #f8fafc;--text-muted: #94a3b8;--border-color: #334155;--accent-color: #3b82f6;--radius-lg: 16px;--radius-md: 10px;--radius-sm: 6px;--shadow: 0 10px 25px -5px rgba(0, 0, 0, .4)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--bg-app);color:var(--text-main);font-size:16px;line-height:1.5;min-height:100vh;-webkit-tap-highlight-color:transparent}.app-container{max-width:600px;margin:0 auto;padding:16px;display:flex;flex-direction:column;gap:20px;min-height:100vh}.app-header{display:flex;justify-content:space-between;align-items:center;padding:8px 4px}.logo-wrapper{display:flex;align-items:center;gap:8px}.logo-title{font-size:1.25rem;font-weight:700;letter-spacing:-.5px;background:linear-gradient(135deg,#60a5fa,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.history-toggle-btn{position:relative;background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);padding:10px 14px;border-radius:var(--radius-md);display:flex;align-items:center;gap:8px;font-size:.9rem;font-weight:500;cursor:pointer;min-height:44px}.history-toggle-btn:active{background:var(--bg-hover)}.badge{background:var(--accent-color);color:#fff;font-size:.75rem;font-weight:700;padding:2px 6px;border-radius:10px}.category-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;background:var(--bg-card);padding:6px;border-radius:var(--radius-lg);border:1px solid var(--border-color)}.tab-button{background:transparent;border:none;color:var(--text-muted);padding:12px 6px;border-radius:var(--radius-md);display:flex;flex-direction:column;align-items:center;gap:6px;cursor:pointer;transition:all .2s ease;min-height:52px}.tab-button.active{background:var(--bg-hover);color:var(--text-main);box-shadow:var(--shadow)}.tab-button.active .tab-icon{color:var(--active-color)}.tab-label{font-size:.8rem;font-weight:600}.converter-card{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border-color);border-top:4px solid var(--accent-color);padding:20px;display:flex;flex-direction:column;gap:20px;box-shadow:var(--shadow)}.card-top-bar{display:flex;justify-content:space-between;align-items:center}.precision-selector{display:flex;align-items:center;gap:6px}.precision-selector .label{font-size:.8rem;color:var(--text-muted);margin-right:2px}.chip-btn{background:var(--bg-app);border:1px solid var(--border-color);color:var(--text-muted);font-size:.85rem;padding:6px 10px;border-radius:var(--radius-sm);cursor:pointer;min-height:36px;min-width:36px;font-weight:600}.chip-btn.active{background:var(--accent-color);border-color:var(--accent-color);color:#fff}.refresh-btn{background:#8b5cf626;border:1px solid rgba(139,92,246,.3);color:#a78bfa;padding:6px 12px;border-radius:var(--radius-sm);display:flex;align-items:center;gap:6px;font-size:.8rem;font-weight:600;cursor:pointer;min-height:36px}.refresh-btn:active{background:#8b5cf64d}.conversion-fields{display:flex;flex-direction:column;gap:12px;position:relative}.input-group{background:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:14px;display:flex;flex-direction:column;gap:10px}.group-header{display:flex;justify-content:space-between;align-items:center}.group-header label{font-size:.75rem;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);font-weight:700}.unit-select{background:var(--bg-card);color:var(--text-main);border:1px solid var(--border-color);padding:8px 12px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;outline:none;cursor:pointer;max-width:180px;min-height:44px}.input-wrapper{position:relative;display:flex;align-items:center}.number-input{width:100%;background:transparent;border:none;color:var(--text-main);font-size:1.8rem;font-weight:700;outline:none;padding-right:32px}.number-input::-webkit-outer-spin-button,.number-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.number-input[type=number]{-moz-appearance:textfield}.clear-input-btn{position:absolute;right:0;background:transparent;border:none;color:var(--text-muted);font-size:1.4rem;cursor:pointer;padding:4px 8px;min-height:44px}.presets-row{display:flex;gap:8px}.preset-chip{flex:1;text-align:center;background:var(--bg-card)}.swap-divider{display:flex;justify-content:center;align-items:center;margin:-6px 0;z-index:2}.swap-btn{border:none;color:#fff;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow);transition:transform .3s ease}.swap-btn.spin{transform:rotate(180deg)}.result-group{background:#ffffff08;border-color:#ffffff1a}.result-display{display:flex;justify-content:space-between;align-items:center;padding:8px 0;cursor:pointer}.result-value-wrapper{display:flex;align-items:baseline;gap:8px;overflow-x:auto}.result-number{font-size:2rem;font-weight:800;color:#38bdf8;word-break:break-all}.result-symbol{font-size:1.1rem;color:var(--text-muted);font-weight:600}.copy-btn{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0}.copy-btn .copied{color:#10b981}.all-units-section{display:flex;flex-direction:column;gap:12px}.section-title{font-size:1rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.units-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.unit-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:12px;display:flex;flex-direction:column;gap:6px;cursor:pointer;transition:border-color .2s;min-height:70px}.unit-card:active{background:var(--bg-hover);border-color:var(--text-muted)}.unit-card-header{display:flex;justify-content:space-between;font-size:.8rem;color:var(--text-muted);font-weight:600}.unit-card-value-row{display:flex;justify-content:space-between;align-items:center}.unit-card-value{font-size:1.1rem;font-weight:700;color:var(--text-main);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.card-copy-icon{color:var(--text-muted);opacity:.6}.drawer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;justify-content:flex-end}.drawer-content{width:100%;max-width:400px;background:var(--bg-app);height:100%;display:flex;flex-direction:column;padding:20px;gap:16px;box-shadow:var(--shadow);animation:slideIn .25s cubic-bezier(.16,1,.3,1)}@keyframes slideIn{0%{transform:translate(100%)}to{transform:translate(0)}}.drawer-header{display:flex;justify-content:space-between;align-items:center}.drawer-actions{display:flex;gap:8px}.icon-btn{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;cursor:pointer}.text-danger{color:#ef4444}.drawer-body{flex:1;overflow-y:auto}.empty-history{color:var(--text-muted);text-align:center;margin-top:40px}.history-list{display:flex;flex-direction:column;gap:10px}.history-item{background:var(--bg-card);border:1px solid var(--border-color);padding:12px 16px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:space-between;font-size:.95rem;cursor:pointer}.history-item:active{background:var(--bg-hover)}.history-arrow{color:var(--text-muted);font-weight:700}.history-from,.history-to{display:flex;gap:4px;align-items:baseline}.history-item .val{font-weight:700}.history-item .unit{color:var(--text-muted);font-size:.85rem}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--accent-color);color:#fff;padding:10px 20px;border-radius:30px;font-weight:600;font-size:.9rem;box-shadow:var(--shadow);z-index:200;animation:popUp .2s ease}@keyframes popUp{0%{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%)}}@media (min-width: 768px){.app-container{padding:32px 16px}.units-grid{grid-template-columns:repeat(3,1fr)}}