.sci-calculator{--sci-primary: #5b21b6;--sci-primary-dark: #4c1d95;--sci-secondary: #7c3aed;--sci-accent: #a78bfa;--sci-bg: #f5f3ff;--sci-card-bg: #ffffff;--sci-text: #1e1b4b;--sci-text-muted: #6366f1;--sci-border: #ddd6fe;--sci-shadow: 0 4px 20px rgba(91, 33, 182, .12);max-width:900px;margin:0 auto;font-family:system-ui,-apple-system,sans-serif}.sci-header{text-align:center;margin-bottom:2rem}.sci-title{font-size:2rem;font-weight:800;color:var(--sci-primary);margin:0 0 .5rem}.sci-description{color:var(--sci-text-muted);font-size:1.1rem;margin:0}.sci-formula-container{background:linear-gradient(135deg,var(--sci-bg) 0%,#ede9fe 100%);border-radius:16px;padding:1.5rem;margin-bottom:2rem;border:1px solid var(--sci-border)}.sci-formula-title{font-size:1.1rem;font-weight:700;color:var(--sci-primary);margin:0 0 1rem;text-align:center}.sci-formula-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.sci-formula-card{background:var(--sci-card-bg);border-radius:12px;padding:1rem;text-align:center;box-shadow:0 2px 8px #0000000f}.sci-formula-label{display:block;font-size:.85rem;font-weight:600;color:var(--sci-text-muted);margin-bottom:.5rem}.sci-formula-math{font-size:.95rem;color:var(--sci-text);overflow-x:auto;padding:.25rem 0}.sci-calc-container{background:linear-gradient(145deg,#1e1b4b,#312e81);border-radius:20px;padding:1.5rem;margin-bottom:2rem;box-shadow:var(--sci-shadow)}.sci-display{background:#0f172a;border-radius:12px;padding:1rem 1.5rem;margin-bottom:1rem;min-height:80px}.sci-display-expr{font-size:1.5rem;color:#e2e8f0;text-align:right;word-break:break-all;font-family:Courier New,monospace}.sci-display-result{font-size:1.1rem;color:#94a3b8;text-align:right;margin-top:.5rem}.sci-mode-toggle{display:flex;gap:.5rem;margin-bottom:1rem}.sci-mode-btn{flex:1;padding:.5rem;background:#ffffff1a;border:none;border-radius:8px;color:#ffffffb3;font-weight:600;cursor:pointer;transition:all .2s}.sci-mode-active{background:var(--sci-secondary);color:#fff}.sci-keypad{display:grid;grid-template-columns:repeat(5,1fr);gap:.5rem}.sci-key{padding:.875rem .5rem;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .15s}.sci-key-num{background:#ffffff26;color:#fff}.sci-key-num:hover{background:#ffffff40}.sci-key-func{background:#7c3aed66;color:#ddd6fe}.sci-key-func:hover{background:#7c3aed99}.sci-key-op{background:var(--sci-secondary);color:#fff}.sci-key-op:hover{background:#8b5cf6}.sci-key-clear{background:#ef4444;color:#fff}.sci-key-clear:hover{background:#dc2626}.sci-key-paren{background:#ffffff1a;color:#a5b4fc}.sci-key-equals{background:linear-gradient(135deg,#10b981,#059669);color:#fff;grid-row:span 2}.sci-key-equals:hover{background:linear-gradient(135deg,#059669,#047857)}.sci-content{margin-top:3rem}.sci-content-section{margin-bottom:2.5rem}.sci-content-title{font-size:1.5rem;font-weight:700;color:var(--sci-text);margin:0 0 1rem;padding-bottom:.5rem;border-bottom:3px solid var(--sci-primary)}.sci-content-text{color:var(--sci-text-muted);line-height:1.7;margin:0 0 1rem}.sci-features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1.5rem}.sci-feature-card{background:var(--sci-bg);border-radius:12px;padding:1.25rem;text-align:center}.sci-feature-icon{font-size:2rem;display:block;margin-bottom:.75rem}.sci-feature-title{font-size:1rem;font-weight:700;color:var(--sci-text);margin:0 0 .5rem}.sci-feature-desc{font-size:.85rem;color:var(--sci-text-muted);margin:0;line-height:1.5}.sci-table-wrapper{overflow-x:auto;border-radius:12px;box-shadow:0 2px 8px #0000000f;margin-top:1.5rem}.sci-table{width:100%;border-collapse:collapse;background:#fff;font-size:.9rem}.sci-table th{background:var(--sci-primary);color:#fff;padding:.875rem 1rem;text-align:left;font-weight:600}.sci-table td{padding:.75rem 1rem;border-bottom:1px solid var(--sci-border)}.sci-table tr:hover{background:var(--sci-bg)}.sci-table-mode{font-weight:700;color:var(--sci-primary)}.sci-tips-grid{display:grid;gap:1rem;margin-top:1.5rem}.sci-tip-card{display:flex;gap:1rem;background:var(--sci-card-bg);border-radius:12px;padding:1.25rem;box-shadow:0 2px 8px #0000000f;border-left:4px solid var(--sci-primary)}.sci-tip-icon{font-size:1.5rem;flex-shrink:0}.sci-tip-content{flex:1}.sci-tip-title{font-size:1rem;font-weight:700;color:var(--sci-text);margin:0 0 .5rem}.sci-tip-text{font-size:.9rem;color:var(--sci-text-muted);margin:0;line-height:1.6}.sci-faqs{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}.sci-faq-item{background:var(--sci-card-bg);border-radius:12px;padding:1.25rem;box-shadow:0 2px 8px #0000000f}.sci-faq-question{font-size:1rem;font-weight:700;color:var(--sci-primary);margin:0 0 .75rem}.sci-faq-answer{font-size:.9rem;color:var(--sci-text-muted);margin:0;line-height:1.6}@media (max-width: 768px){.sci-title{font-size:1.5rem}.sci-keypad{grid-template-columns:repeat(5,1fr);gap:.35rem}.sci-key{padding:.75rem .25rem;font-size:.85rem}.sci-features-grid{grid-template-columns:1fr}}