.paint-calculator-container{--paint-primary: #2563eb;--paint-secondary: #3b82f6;--paint-accent: #60a5fa;--paint-light: #eff6ff;--paint-bg: #dbeafe;--paint-text: #1f2937;--paint-text-light: #6b7280;--paint-border: #e5e7eb;--paint-radius: 12px;--paint-shadow: 0 4px 6px -1px rgba(0,0,0,.1);--paint-shadow-lg: 0 10px 25px -5px rgba(0,0,0,.15);max-width:900px;margin:0 auto;font-family:system-ui,-apple-system,sans-serif}.paint-title{font-size:2rem;font-weight:800;color:var(--paint-primary);margin:0 0 .5rem}.paint-description{color:var(--paint-text-light);font-size:1.1rem;margin:0}.paint-formula-container{background:linear-gradient(135deg,var(--paint-light) 0%,var(--paint-bg) 100%);border-radius:var(--paint-radius);padding:1.5rem;margin-bottom:1.5rem;border:1px solid var(--paint-border)}.paint-formula-title{font-size:1.1rem;font-weight:700;color:var(--paint-primary);margin:0 0 1rem;text-align:center}.paint-formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}.paint-formula-card{background:#fff;border-radius:8px;padding:1rem;text-align:center;box-shadow:var(--paint-shadow)}.paint-formula-label{font-size:.85rem;font-weight:600;color:var(--paint-secondary);margin:0 0 .5rem}.paint-formula-math{font-size:.95rem;color:var(--paint-text);overflow-x:auto}.paint-form{background:#fff;border-radius:var(--paint-radius);padding:1.5rem;box-shadow:var(--paint-shadow);margin-bottom:1.5rem}.paint-input-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}.paint-input-group{display:flex;flex-direction:column}.paint-label{font-size:.85rem;font-weight:600;color:var(--paint-text);margin-bottom:.5rem}.paint-input-wrapper{position:relative;display:flex;align-items:center}.paint-input-prefix{position:absolute;left:1rem;color:var(--paint-text-light);font-weight:600}.paint-input{width:100%;padding:.75rem 1rem;border:2px solid var(--paint-border);border-radius:8px;font-size:1rem;transition:all .2s ease}.paint-input.with-prefix{padding-left:2rem}.paint-input:focus{outline:none;border-color:var(--paint-primary);box-shadow:0 0 0 3px #2563eb1a}.paint-button-group{display:flex;gap:1rem}.paint-calculate-btn{flex:1;padding:1rem;background:linear-gradient(135deg,var(--paint-primary),var(--paint-secondary));color:#fff;border:none;border-radius:10px;font-size:1rem;font-weight:700;cursor:pointer;transition:all .3s ease}.paint-calculate-btn:hover{transform:translateY(-2px);box-shadow:var(--paint-shadow-lg)}.paint-reset-btn{padding:1rem 1.5rem;background:var(--paint-border);color:var(--paint-text);border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease}.paint-reset-btn:hover{background:#d1d5db}.paint-results{background:linear-gradient(135deg,var(--paint-primary),var(--paint-secondary));border-radius:var(--paint-radius);padding:1.5rem;margin-bottom:2rem}.paint-results-title{color:#fff;font-size:1.25rem;font-weight:700;margin:0 0 1rem;text-align:center}.paint-results-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.75rem}.paint-result-card{background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;padding:1rem;text-align:center}.paint-result-card.primary{background:#fffffff2}.paint-result-card.primary .result-label,.paint-result-card.primary .result-value{color:var(--paint-primary)}.paint-result-card.highlight{background:#ffffffe6}.paint-result-card.highlight .result-label,.paint-result-card.highlight .result-value{color:var(--paint-secondary)}.paint-result-card .result-label{display:block;font-size:.75rem;color:#ffffffe6;margin-bottom:.25rem;font-weight:500}.paint-result-card .result-value{display:block;font-size:1.15rem;font-weight:800;color:#fff}.paint-content{margin-top:2rem}.paint-content-section{margin-bottom:2.5rem}.paint-section-title{font-size:1.5rem;font-weight:700;color:var(--paint-primary);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--paint-light)}.paint-paragraph{color:var(--paint-text);line-height:1.7;margin:0 0 1rem}.paint-features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1.5rem 0}.paint-feature-card{background:var(--paint-light);border-radius:10px;padding:1.25rem;text-align:center;border:1px solid var(--paint-border)}.paint-feature-card .feature-icon{font-size:2rem;display:block;margin-bottom:.5rem}.paint-feature-card .feature-title{font-size:1rem;font-weight:700;color:var(--paint-primary);margin:0 0 .5rem}.paint-feature-card .feature-desc{font-size:.85rem;color:var(--paint-text-light);margin:0}.paint-tips-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-top:1rem}@media (max-width: 768px){.paint-tips-grid{grid-template-columns:1fr}}.paint-tip-card{background:#f8fafc;border-radius:var(--paint-radius);padding:1rem;border-left:4px solid var(--paint-primary)}.paint-tip-header{display:flex;align-items:center;gap:.5rem}.paint-tip-icon{font-size:1.25rem}.paint-tip-title{font-size:.95rem;font-weight:700;color:var(--paint-text);margin:0}.paint-tip-text{font-size:.9rem;color:var(--paint-text-light);margin:0;line-height:1.6}.paint-table-wrapper{overflow-x:auto;margin-top:1rem;border-radius:var(--paint-radius);border:1px solid var(--paint-border)}.paint-table{width:100%;border-collapse:collapse;font-size:.9rem}.paint-table th{background:linear-gradient(135deg,var(--paint-primary),var(--paint-secondary));color:#fff;padding:.875rem 1rem;text-align:left;font-weight:600}.paint-table td{padding:.75rem 1rem;border-bottom:1px solid var(--paint-border);color:var(--paint-text)}.paint-table tr:last-child td{border-bottom:none}.paint-table tr:nth-child(2n){background:#f8fafc}.paint-faqs{margin-top:1rem}.paint-faq{background:#f8fafc;border-radius:var(--paint-radius);margin-bottom:.75rem;border:1px solid var(--paint-border);overflow:hidden}.paint-faq[open]{background:#fff}.paint-faq-question{padding:1rem 1.25rem;font-weight:600;color:var(--paint-text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;list-style:none}.paint-faq-question::-webkit-details-marker{display:none}.paint-faq-question:after{content:"+";font-size:1.25rem;color:var(--paint-primary);font-weight:700;transition:transform .2s ease}.paint-faq[open] .paint-faq-question:after{transform:rotate(45deg)}.paint-faq-answer{padding:0 1.25rem 1rem;color:var(--paint-text-light);line-height:1.6;margin:0;font-size:.95rem}@media (max-width: 640px){.paint-title{font-size:1.5rem}.paint-formula-grid,.paint-input-grid{grid-template-columns:1fr}.paint-button-group{flex-direction:column}.paint-results-grid{grid-template-columns:repeat(2,1fr)}}