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var(--border-color);margin-bottom:2rem}.calc-type-selector{display:flex;gap:.5rem;margin-bottom:2rem;background:var(--hover-bg);padding:.25rem;border-radius:8px}.calc-type-btn{flex:1;padding:.75rem 1rem;border:none;border-radius:6px;background:transparent;color:var(--text-muted);cursor:pointer;transition:all .2s;font-weight:500}.calc-type-btn:hover{color:var(--text-color)}.calc-type-btn.active{background:var(--card-bg);color:var(--primary-color);box-shadow:0 2px 4px #0000001a}.calc-section h3{margin-bottom:1rem;color:var(--text-color);font-size:1.1rem}.dimension-inputs{display:flex;align-items:flex-end;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap}.dimension-separator{font-size:1.5rem;color:var(--text-muted);padding-bottom:.5rem}.input-group{flex:1;min-width:120px}.input-group label{display:block;margin-bottom:.5rem;color:var(--gray-900);font-size:1rem;font-weight:600;line-height:1.5;letter-spacing:.3px}.input-group input{width:100%;padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:8px;font-size:1.1rem;background:var(--input-bg);color:var(--text-color);transition:border-color .2s}.input-group input:focus{outline:none;border-color:var(--primary-color)}.quick-ratios{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem}.ratio-btn{padding:.5rem 1rem;border:1px solid var(--border-color);border-radius:6px;background:var(--card-bg);color:var(--text-color);cursor:pointer;transition:all .2s;font-size:.9rem}.ratio-btn:hover{border-color:var(--primary-color);background:var(--hover-bg)}.ratio-btn.active{border-color:var(--primary-color);background:var(--primary-color);color:#fff}.ratio-inputs{display:flex;align-items:flex-end;gap:1rem;margin-bottom:1rem}.known-dimension{display:flex;gap:1rem;align-items:flex-end;margin-bottom:1.5rem;flex-wrap:wrap}.lock-selector{display:flex;gap:.25rem;background:var(--hover-bg);padding:.25rem;border-radius:8px}.lock-btn{padding:.5rem 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.5rem}.dim-unit{color:var(--text-muted);font-size:1rem;margin-left:.5rem}.resize-info{display:flex;justify-content:center;gap:var(--tool-content-gap, 2rem);color:var(--text-muted);margin-bottom:1rem}.copy-btn{padding:.75rem 1.5rem;background:var(--primary-color);color:#fff;border:none;border-radius:8px;cursor:pointer;font-weight:500;transition:background .2s}.copy-btn:hover{background:var(--primary-hover)}.converter-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}.converter-section{margin-bottom:2rem}.converter-section:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}.source-ratio{margin-top:.5rem;color:var(--text-muted)}.fit-mode-selector{display:flex;gap:1rem;flex-wrap:wrap}.fit-btn{flex:1;min-width:140px;padding:1rem;border:2px solid var(--border-color);border-radius:12px;background:var(--card-bg);cursor:pointer;transition:all .2s;display:flex;flex-direction:column;align-items:center;gap:.25rem}.fit-btn:hover{border-color:var(--primary-color)}.fit-btn.active{border-color:var(--primary-color);background:rgba(var(--primary-rgb),.1)}.fit-icon{font-size:1.5rem}.fit-btn span:nth-child(2){font-weight:600;color:var(--text-color)}.fit-desc{font-size:.8rem;color:var(--text-muted)}.converter-result .fit-info{margin:1rem 0}.fit-badge{display:inline-block;padding:.5rem 1rem;background:var(--card-bg);border-radius:20px;font-size:.9rem}.crop-info{color:var(--text-muted)}.presets-mode{display:flex;flex-direction:column;gap:var(--tool-content-gap, 2rem)}.platform-section{border-bottom:1px solid var(--border-color);padding-bottom:2rem}.platform-section:last-child{border-bottom:none;padding-bottom:0}.platform-title{display:flex;align-items:center;gap:.5rem;margin-bottom:1rem;font-size:1.25rem;color:var(--text-color);text-transform:capitalize}.platform-icon{width:24px;height:24px;border-radius:6px}.platform-icon.youtube{background:red}.platform-icon.instagram{background:linear-gradient(45deg,#f09433,#e6683c,#dc2743,#cc2366,#bc1888)}.platform-icon.twitter{background:#000}.platform-icon.facebook{background:#1877f2}.platform-icon.linkedin{background:#0077b5}.platform-icon.tiktok{background:#000}.platform-icon.pinterest{background:#e60023}.preset-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem}.preset-card{padding:1rem;border:2px solid var(--border-color);border-radius:12px;background:var(--card-bg);cursor:pointer;transition:all .2s;text-align:left}.preset-card:hover{border-color:var(--primary-color);transform:translateY(-2px)}.preset-preview{background:#f9fafb;border:2px solid #d1d5db;border-radius:6px;display:flex;align-items:center;justify-content:center;margin-bottom:.75rem;max-height:80px;min-height:40px;font-size:.85rem;color:var(--text-muted)}.preset-info{display:flex;flex-direction:column;gap:.25rem}.preset-name{font-weight:600;color:var(--text-color);font-size:.9rem}.preset-dims{color:var(--text-muted);font-size:.8rem}.common-ratios-section{margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border-color)}.common-ratios-section h3{margin-bottom:1.5rem;color:var(--text-color)}.ratios-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:1rem}.ratio-card{padding:1rem;border:1px solid var(--border-color);border-radius:12px;background:var(--card-bg);cursor:pointer;transition:all .2s}.ratio-card:hover{border-color:var(--primary-color);transform:translateY(-2px)}.ratio-card-preview{background:#f9fafb;color:#fff;border:2px solid #d1d5db;border-radius:4px;display:flex;align-items:center;justify-content:center;margin-bottom:.75rem;max-height:60px;min-height:30px;font-size:.85rem;font-weight:600}.ratio-card-info{display:flex;flex-direction:column;gap:.25rem}.ratio-card-name{font-weight:600;color:var(--text-color);font-size:.85rem}.ratio-card-use{color:var(--text-muted);font-size:.75rem}.tips-section{background:var(--card-bg);border-radius:16px;padding:2rem;border:1px solid var(--border-color);margin-bottom:2rem}.tips-section h3{margin-bottom:1.5rem;color:var(--text-color)}.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.5rem}.tip-card{padding:1.5rem;background:var(--hover-bg);border-radius:12px}.tip-icon{font-size:2rem;display:block;margin-bottom:.75rem}.tip-card h4{margin-bottom:.5rem;color:var(--text-color)}.tip-card p{color:var(--text-muted);font-size:.9rem;line-height:1.5}.cta-section{background:linear-gradient(135deg,var(--primary-color),var(--primary-hover));border-radius:16px;padding:3rem 2rem;text-align:center;color:#fff}.cta-section h3{font-size:1.75rem;margin-bottom:1rem}.cta-section p{opacity:.9;margin-bottom:1.5rem;max-width:500px;margin-left:auto;margin-right:auto}.cta-button{display:inline-block;padding:1rem 2rem;background:#fff;color:var(--primary-color);text-decoration:none;border-radius:8px;font-weight:600;transition:transform .2s,box-shadow .2s}.cta-button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0003}@media (max-width: 479px){.aspect-ratio-calculator{padding:.75rem}.tool-header h1{font-size:1.5rem}.mode-selector{gap:.5rem}.mode-btn{padding:.75rem 1rem;font-size:.85rem}.tool-content{padding:1rem}.dimension-inputs{flex-direction:column;align-items:stretch}.dimension-separator{text-align:center;padding:0}.ratio-value{font-size:1.75rem}.calculated-dimensions{font-size:1.25rem}.fit-mode-selector{flex-direction:column}.fit-btn{width:100%}.preset-grid,.ratios-grid{grid-template-columns:1fr}.preset-card,.ratio-card{padding:.875rem}.quick-ratios{gap:.375rem}.ratio-btn{padding:.5rem .875rem;font-size:.85rem}}@media (min-width: 480px) and (max-width: 767px){.aspect-ratio-calculator{padding:1rem}.tool-header h1{font-size:1.75rem}.mode-btn{padding:.75rem 1rem;font-size:.9rem}.tool-content{padding:1rem}.dimension-inputs{flex-direction:column;align-items:stretch}.dimension-separator{text-align:center;padding:0}.ratio-value{font-size:2rem}.calculated-dimensions{font-size:1.5rem}.fit-mode-selector{flex-direction:column}.fit-btn{width:100%}.preset-grid,.ratios-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width: 768px) and (max-width: 1023px){.preset-grid,.ratios-grid{grid-template-columns:repeat(3,1fr)}}.aspect-ratio-calculator .copy-section{max-width:800px;margin:0 auto 2rem;padding:0 1rem}.aspect-ratio-calculator .copy-results-btn{display:flex;align-items:center;justify-content:center;gap:.5rem;width:100%;padding:.875rem 1.5rem;background:linear-gradient(135deg,var(--primary) 0%,#6366f1 100%);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease}.aspect-ratio-calculator .copy-results-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #4f46e566}.aspect-ratio-calculator .copy-results-btn:active{transform:translateY(0)}.aspect-ratio-calculator .copy-results-btn svg{flex-shrink:0}