:root{--accent:var(--calc-color-automotive,var(--calc-cyan));--accent-soft:rgba(var(--calc-color-automotive-rgb,34, 211, 238), .1)}[data-theme=light]{--accent:var(--calc-color-automotive,#0891b2);--accent-soft:#0369a114}*{box-sizing:border-box}body{background:var(--calc-bg-page);color:var(--calc-text-primary);min-height:100vh;font-family:Inter,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.calc-breadcrumb{color:var(--calc-text-muted);padding:10px 24px;font-size:.79rem}.calc-breadcrumb a{color:var(--calc-text-faded)}.main-container{max-width:1200px;margin:0 auto;padding:24px}.calc-title{font-family:var(--calc-font-headline);color:var(--calc-text-primary);margin-bottom:8px;font-size:clamp(1.6rem,4vw,2rem);font-weight:700}.calc-subtitle{color:var(--calc-text-faded);margin-bottom:24px;line-height:1.5}.tab-nav{border-bottom:1px solid var(--calc-border-default);gap:4px;margin-bottom:20px;display:flex}.tab-btn{color:var(--calc-text-faded);min-height:var(--calc-min-touch);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 20px;font-family:inherit;font-size:.9rem;transition:color .2s,border-color .2s}.tab-btn:hover{color:var(--calc-text-primary)}.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.tab-content{display:none}.tab-content.active{display:block}.calc-layout{grid-template-columns:320px 1fr;align-items:start;gap:20px;display:grid}@media (width<=900px){.calc-layout{grid-template-columns:1fr}}.card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-md);padding:20px}.input-card{border-left:3px solid var(--calc-cyan)}.result-card{border-left:3px solid var(--calc-purple)}.form-group{margin-bottom:16px}.form-label{color:var(--calc-text-faded);margin-bottom:6px;font-size:.82rem;font-weight:500;display:block}.section-title{color:var(--calc-text-primary);margin-bottom:14px;font-size:1rem;font-weight:700}.input-hint{color:var(--calc-text-dim);margin-top:5px;font-size:.78rem;line-height:1.4;display:block}.hero-result{text-align:center;background:linear-gradient(135deg, var(--accent-soft), #60a5fa0a);border:1px solid var(--accent-soft);border-radius:var(--calc-radius-md);margin-bottom:18px;padding:20px 24px 16px;position:relative}.hero-label{color:var(--calc-text-muted);text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px;font-size:.72rem}.hero-value{font-family:var(--calc-font-mono);color:var(--accent);margin-bottom:6px;font-size:clamp(1.9rem,5vw,2.4rem);font-weight:800;line-height:1}.hero-sub{color:var(--calc-text-faded);font-size:.87rem;line-height:1.4}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-bottom:16px;display:grid}.stat-card{background:var(--calc-bg-input);border:1px solid var(--calc-border-subtle,var(--calc-border-default));border-radius:var(--calc-radius-sm,8px);text-align:center;padding:12px 14px}.stat-label{color:var(--calc-text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px;font-size:.7rem}.stat-value{font-family:var(--calc-font-mono);color:var(--calc-text-primary);font-size:1.15rem;font-weight:700}.result-interpretation{color:var(--calc-text-primary);background:var(--calc-bg-input);border-left:3px solid var(--accent);border-radius:6px;margin-bottom:16px;padding:10px 14px;font-size:.9rem;line-height:1.5}.formula-strip{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.formula-pill{background:var(--accent-soft);color:var(--accent);font-family:var(--calc-font-mono);border-radius:999px;padding:5px 12px;font-size:.76rem}.chart-wrap{margin-bottom:8px}.data-table{border-collapse:collapse;width:100%;font-size:.86rem}.data-table th,.data-table td{text-align:left;border-bottom:1px solid var(--calc-border-subtle,var(--calc-border-default));padding:9px 12px}.data-table th{color:var(--calc-text-faded);text-transform:uppercase;letter-spacing:.04em;font-size:.76rem;font-weight:600}.data-table td{color:var(--calc-text-primary);font-family:var(--calc-font-mono)}.action-bar{border-top:1px solid var(--calc-border-default);flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:16px;display:flex}.action-btn{background:var(--calc-bg-input);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-sm,8px);color:var(--calc-text-primary);min-height:var(--calc-min-touch);cursor:pointer;padding:8px 14px;font-size:.82rem;transition:border-color .2s,color .2s}.action-btn:hover{border-color:var(--accent);color:var(--accent)}.action-btn--reset:hover{border-color:var(--calc-rose);color:var(--calc-rose)}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--calc-text-primary);user-select:none;justify-content:space-between;align-items:center;padding:14px 4px;font-size:.9rem;font-weight:600;list-style:none;transition:color .2s;display:flex}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:after{content:"+";font-family:var(--calc-font-mono);color:var(--calc-text-faded);flex-shrink:0;margin-left:16px;font-size:1.1rem;transition:color .2s}.faq-item[open] .faq-item__question:after{content:"−";color:var(--accent)}.faq-item__question:hover{color:var(--accent)}.faq-item__answer{color:var(--calc-text-faded);padding:0 4px 14px;font-size:.85rem;line-height:1.75}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .stat-card{background:#f0f4f9;border-color:#0000001a}[data-theme=light] .hero-result{background:linear-gradient(135deg,#0891b214,#2563eb0a);border-color:#0891b240}[data-theme=light] .result-interpretation{background:#eff9fb}[data-theme=light] .action-btn{background:#f0f4f9;border-color:#00000026}[data-theme=light] .tab-btn:hover{color:#0f172a}[data-theme=light] .data-table th,[data-theme=light] .data-table td{border-color:#00000014}[data-theme=light] .faq-list{gap:8px}[data-theme=light] .faq-item{background:#fff;border:1px solid #0000001a;border-radius:10px;transition:box-shadow .2s,border-color .2s;overflow:hidden;box-shadow:0 1px 4px #0000000f}[data-theme=light] .faq-item:hover{border-color:#0891b259;box-shadow:0 2px 10px #0891b214}[data-theme=light] .faq-item[open]{border-color:#0891b266 #0891b266 #0891b266 #0891b2;border-left-style:solid;border-left-width:3px;box-shadow:0 2px 12px #0891b21a}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after,[data-theme=light] .faq-item__question:hover{color:#0891b2}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}