.main-container{max-width:1400px;margin:0 auto;padding:40px 20px}.page-title{font-family:var(--calc-font-headline);color:var(--calc-text-primary);letter-spacing:-.02em;margin:0 0 8px;font-size:clamp(1.7rem,3.5vw,2.4rem);font-weight:800}.page-subtitle{color:var(--calc-text-dim);max-width:72ch;margin:0 0 20px;font-size:1rem;line-height:1.6}.input-card,.result-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-lg);margin-bottom:1.25rem;padding:1.25rem 1.5rem}.card-title{font-family:var(--calc-font-headline);text-transform:uppercase;letter-spacing:.05em;color:var(--calc-text-faded);margin:0 0 1rem;font-size:1rem}.form-group{flex-direction:column;gap:.4rem;margin-bottom:1rem;display:flex}.form-group:last-child{margin-bottom:0}.form-group label{color:var(--calc-text-faded);font-size:.9rem}.form-group input{background:var(--calc-bg-input);border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-md);color:var(--calc-text-primary);font-family:var(--calc-font-mono);padding:.65rem .85rem;font-size:1.05rem;transition:border-color .15s}.form-group input:focus{border-color:var(--calc-cyan);outline:none}.input-hint{color:var(--calc-text-dim);font-size:.8rem}.result-value{font-family:var(--calc-font-mono);color:var(--calc-cyan);margin-bottom:.3rem;font-size:clamp(1.8rem,5vw,2.6rem)}.result-detail{color:var(--calc-text-faded);line-height:1.5}.result-interpretation{color:var(--calc-text-faded);border:1px solid #22d3ee38;border-left:3px solid var(--calc-cyan);border-radius:var(--calc-radius-md);background:#22d3ee0f;margin:14px 0 0;padding:12px 14px;font-size:.88rem;line-height:1.6}.result-interpretation:empty{display:none}.result-card[data-result-guard=target-too-low] .result-value,.result-card[data-result-guard=target-too-high] .result-value{color:#fb7185}.result-card[data-result-guard=overflow] .result-value,.result-card[data-result-guard=tank-full] .result-value{color:#fb923c}.mix-bar{border-radius:var(--calc-radius-md);border:1px solid var(--calc-border-default);height:28px;margin-bottom:14px;display:flex;overflow:hidden}.mix-bar__gas{background:#818cf8;transition:width .4s}.mix-bar__e85{background:var(--calc-cyan);transition:width .4s}.mix-legend{color:var(--calc-text-faded);flex-wrap:wrap;gap:18px;margin-bottom:18px;font-size:.85rem;display:flex}.mix-legend__item{align-items:center;gap:6px;display:inline-flex}.mix-swatch{border-radius:3px;width:12px;height:12px;display:inline-block}.mix-swatch--gas{background:#818cf8}.mix-swatch--e85{background:var(--calc-cyan)}.mix-table{border-collapse:collapse;width:100%;font-size:.9rem}.mix-table th,.mix-table td{text-align:left;border-bottom:1px solid var(--calc-border-subtle);padding:10px 12px}.mix-table th{color:var(--calc-text-faded);text-transform:uppercase;letter-spacing:.04em;font-size:.78rem;font-weight:600}.mix-table td{color:var(--calc-text-primary)}.mix-table__total td{border-bottom:none;border-top:2px solid var(--calc-border-default);font-weight:700}.preset-chips{flex-wrap:wrap;gap:10px;margin-top:12px;display:flex}.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:.92rem;font-weight:600;list-style:none;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-dim);flex-shrink:0;margin-left:16px;font-size:1.1rem}.faq-item[open] .faq-item__question:after{content:"−";color:var(--calc-cyan)}.faq-item__answer{color:var(--calc-text-dim);padding:0 4px 14px;font-size:.86rem;line-height:1.75}.page-sections-outer{max-width:1600px;margin:0 auto;padding:0 1.5rem 3rem}[data-theme=light] .input-card,[data-theme=light] .result-card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .form-group input{color:#0f172a;background:#f0f4f9;border-color:#00000026}[data-theme=light] .page-subtitle{color:#475569}[data-theme=light] .input-hint{color:#64748b}[data-theme=light] .result-detail{color:#475569}[data-theme=light] .result-interpretation{color:#334155;background:#eff9fb;border-color:#0891b24d #0891b24d #0891b24d #0891b2}[data-theme=light] .result-card[data-result-guard=target-too-low] .result-value,[data-theme=light] .result-card[data-result-guard=target-too-high] .result-value{color:#e11d48}[data-theme=light] .result-card[data-result-guard=overflow] .result-value,[data-theme=light] .result-card[data-result-guard=tank-full] .result-value{color:#c2410c}[data-theme=light] .mix-bar{border-color:#0000001f}[data-theme=light] .mix-bar__gas{background:#4f46e5}[data-theme=light] .mix-bar__e85{background:#0891b2}[data-theme=light] .mix-swatch--gas{background:#4f46e5}[data-theme=light] .mix-swatch--e85{background:#0891b2}[data-theme=light] .mix-legend{color:#475569}[data-theme=light] .mix-table th,[data-theme=light] .mix-table td{color:#0f172a;border-color:#0000001a}[data-theme=light] .mix-table th{color:#64748b}[data-theme=light] .mix-table__total td{border-top-color:#0003}[data-theme=light] .faq-item__question{color:#0f172a}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after{color:#0891b2}[data-theme=light] .faq-item__answer{color:#475569}@media print{.action-bar,.tab-bar,.glass-navbar,.calc-back-to-top,.nav-toggle{display:none}}