.unit-converter{max-width:1200px;margin:0 auto;padding:2rem}.unit-converter .tool-header{text-align:center;margin-bottom:2rem}.unit-converter .tool-header h1{font-size:2.5rem;color:var(--text-color);margin-bottom:.5rem}.unit-converter .tool-header p{color:var(--text-light);font-size:1.1rem}.converter-layout{display:grid;grid-template-columns:1fr 320px;gap:var(--tool-content-gap, 2rem)}.converter-main{display:flex;flex-direction:column;gap:var(--tool-content-gap, 2rem)}.category-section{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px #00000014}.category-section h3{font-size:1.15rem;font-weight:700;color:var(--gray-900);margin-bottom:1.25rem;padding-bottom:.75rem;border-bottom:2px solid var(--primary);letter-spacing:.03em}.category-section:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.75rem}.category-btn{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1rem;background:var(--bg-light);border:2px solid transparent;border-radius:10px;cursor:pointer;transition:all .2s}.category-btn:hover{background:var(--primary-light);border-color:var(--primary-color)}.category-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.category-icon{font-size:1.5rem}.category-name{font-size:.85rem;font-weight:500;text-align:center}.conversion-section{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 2px 8px #00000014}.conversion-inputs{display:flex;align-items:flex-end;gap:1rem}.input-group{flex:1;display:flex;flex-direction:column;gap:.5rem}.input-group label{font-weight:600;color:var(--gray-900);font-size:1rem;margin-bottom:.5rem;line-height:1.5;letter-spacing:.3px}.value-input{padding:1rem;font-size:1.25rem;border:2px solid var(--border-color);border-radius:8px;width:100%;transition:border-color .2s}.value-input:focus{outline:none;border-color:var(--primary-color)}.result-input{background:var(--bg-light);font-weight:600;color:var(--primary-color)}.unit-select{padding:.75rem;font-size:1rem;border:2px solid var(--border-color);border-radius:8px;background:#fff;cursor:pointer;transition:border-color .2s}.unit-select:focus{outline:none;border-color:var(--primary-color)}.swap-btn{padding:1rem;font-size:1.5rem;background:var(--primary-color);color:#fff;border:none;border-radius:50%;width:50px;height:50px;cursor:pointer;transition:transform .2s,background .2s;flex-shrink:0;margin-bottom:2.5rem}.swap-btn:hover{background:var(--primary-dark);transform:rotate(180deg)}.result-display{margin-top:2rem;padding:1.5rem;background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);border-radius:12px;color:#fff;text-align:center}.result-text{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:.5rem;font-size:1.25rem;margin-bottom:1rem}.from-value,.to-value{font-size:1.75rem;font-weight:700}.unit-name{opacity:.9}.equals{font-size:1.5rem;margin:0 .5rem}.result-actions{display:flex;justify-content:center;gap:.75rem;flex-wrap:wrap}.action-btn{padding:.5rem 1rem;background:#fff3;border:1px solid rgba(255,255,255,.3);border-radius:6px;color:#fff;cursor:pointer;font-size:.9rem;transition:background .2s}.action-btn:hover{background:#ffffff4d}.quick-conversions{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px #00000014}.quick-conversions h3{margin-bottom:1rem;color:var(--text-color)}.quick-table-wrapper{overflow-x:auto}.quick-table{width:100%;border-collapse:collapse}.quick-table th,.quick-table td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--border-color)}.quick-table th{background:var(--bg-light);font-weight:600;color:var(--text-color)}.quick-table td:first-child{font-weight:600;color:var(--primary-color)}.converter-sidebar{display:flex;flex-direction:column;gap:1.5rem}.sidebar-section{background:#fff;border-radius:12px;padding:1.25rem;box-shadow:0 2px 8px #00000014}.sidebar-section h3{font-size:1rem;margin-bottom:1rem;color:var(--text-color);padding-bottom:.75rem;border-bottom:1px solid var(--border-color)}.empty-message{color:var(--text-light);font-size:.9rem;text-align:center;padding:1rem 0}.favorites-list{display:flex;flex-direction:column;gap:.5rem}.favorite-item{display:flex;align-items:center;gap:.5rem}.favorite-load{flex:1;display:flex;align-items:center;gap:.5rem;padding:.75rem;background:var(--bg-light);border:none;border-radius:8px;cursor:pointer;transition:background .2s;text-align:left}.favorite-load:hover{background:var(--primary-light)}.fav-icon{font-size:1.1rem}.fav-text{font-size:.85rem;color:var(--text-color)}.favorite-remove{padding:.5rem .75rem;background:none;border:none;color:var(--text-light);cursor:pointer;font-size:1.25rem;border-radius:4px;transition:color .2s,background .2s}.favorite-remove:hover{color:#dc2626;background:#fee2e2}.history-list{display:flex;flex-direction:column;gap:.5rem;max-height:300px;overflow-y:auto}.history-item{display:flex;align-items:center;gap:.75rem;padding:.75rem;background:var(--bg-light);border-radius:8px}.history-icon{font-size:1.1rem}.history-content{flex:1;display:flex;flex-direction:column;gap:.1rem}.history-conversion{font-weight:600;font-size:.9rem;color:var(--text-color)}.history-units,.history-time{font-size:.75rem;color:var(--text-light)}.tips-section{background:linear-gradient(135deg,#f0f9ff,#e0f2fe)}.tips-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.75rem}.tips-list li{font-size:.85rem;color:var(--text-color);padding-left:1.5rem;position:relative}.tips-list li:before{content:"•";position:absolute;left:0;color:var(--primary-color);font-weight:700}.cta-section{margin-top:3rem;text-align:center;padding:3rem;background:linear-gradient(135deg,var(--primary-color) 0%,var(--secondary-color) 100%);border-radius:16px;color:#fff}.cta-section h2{font-size:1.75rem;margin-bottom:1rem}.cta-section p{font-size:1.1rem;opacity:.95;margin-bottom:1.5rem;max-width:600px;margin-left:auto;margin-right:auto}.cta-button{display:inline-block;padding:1rem 2rem;background:#fff;color:var(--primary-color);font-weight:600;text-decoration:none;border-radius:8px;transition:transform .2s,box-shadow .2s}.cta-button:hover{transform:translateY(-2px);box-shadow:0 10px 30px #0003}@media (max-width: 900px){.converter-layout{grid-template-columns:1fr}.converter-sidebar{order:1}}.unit-converter .copy-results-btn{display:flex;align-items:center;justify-content:center;gap:.5rem;width:100%;padding:.875rem 1.5rem;margin-top:1rem;background:linear-gradient(135deg,var(--primary-color) 0%,#6366f1 100%);color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;box-shadow:0 2px 8px #4f46e54d}.unit-converter .copy-results-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #4f46e566}.unit-converter .copy-results-btn:active{transform:translateY(0)}.unit-converter .copy-results-btn svg{flex-shrink:0}@media (max-width: 700px){.unit-converter{padding:1rem}.conversion-inputs{flex-direction:column;align-items:stretch}.swap-btn{margin:0 auto;transform:rotate(90deg)}.swap-btn:hover{transform:rotate(270deg)}.category-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}.category-btn{padding:.75rem .5rem}.category-name{font-size:.75rem}.result-text{font-size:1rem}.from-value,.to-value{font-size:1.25rem}.cta-section{padding:2rem 1.5rem}.cta-section h2{font-size:1.5rem}}