:root{--accent:var(--calc-color-science)}*{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:1.6;transition:background .3s,color .3s}.main-container{max-width:1600px;margin:0 auto;padding:1.5rem}.calc-breadcrumb{color:var(--calc-text-muted);margin-bottom:.75rem;font-size:.8rem}.calc-breadcrumb a{color:var(--calc-text-dim);text-decoration:none}.calc-breadcrumb a:hover{color:var(--calc-cyan)}.page-title{background:linear-gradient(135deg,#e879f9 0%,#a855f7 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:.25rem;font-family:Plus Jakarta Sans,sans-serif;font-size:clamp(1.6rem,3vw,2.4rem);font-weight:800}[data-theme=light] .page-title{background:linear-gradient(135deg,#a21caf 0%,#7c3aed 100%);-webkit-background-clip:text;background-clip:text}.page-subtitle{color:var(--calc-text-dim);max-width:70ch;margin-bottom:1.5rem;font-size:.95rem}.calc-grid{grid-template-columns:minmax(280px,340px) 1fr;align-items:start;gap:1.5rem;display:grid}@media (width<=1024px){.calc-grid{grid-template-columns:1fr}}.input-card,.result-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-lg);padding:1.25rem 1.5rem 1.5rem}.card-title{font-family:var(--calc-font-headline);text-transform:uppercase;letter-spacing:.06em;color:var(--calc-text-faded);margin:0 0 1rem;font-size:.85rem}.preset-row{flex-wrap:wrap;gap:.5rem;margin-bottom:1.25rem;display:flex}.preset-chip{background:var(--calc-bg-input);border:1px solid var(--calc-border-default);color:var(--calc-text-dim);cursor:pointer;border-radius:999px;padding:.4rem .85rem;font-size:.78rem;transition:border-color .15s,color .15s}.preset-chip:hover{border-color:var(--accent);color:var(--calc-text-primary)}.form-group{flex-direction:column;gap:.4rem;margin-bottom:1rem;display:flex}.form-label{color:var(--calc-text-faded);font-size:.85rem}.glass-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);width:100%;padding:.65rem .85rem;font-size:1.02rem;transition:border-color .15s}.glass-input:focus{border-color:var(--accent);outline:none}.input-hint{color:var(--calc-text-dim);margin:0;font-size:.78rem}.outer-tabs{border-bottom:1px solid var(--calc-border-default);flex-wrap:wrap;gap:.4rem;margin-bottom:1.25rem;display:flex}.outer-tab{color:var(--calc-text-dim);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;padding:.6rem .9rem;font-size:.9rem;font-weight:600;transition:color .15s,border-color .15s}.outer-tab:hover{color:var(--calc-text-primary)}.outer-tab.active{color:var(--accent);border-bottom-color:var(--accent)}.tab-content{display:none}.tab-content.active{display:block}.tab-desc{color:var(--calc-text-dim);margin:0 0 1rem;font-size:.88rem}.mode-chips{flex-wrap:wrap;gap:.5rem;margin-bottom:1.25rem;display:flex}.mode-chip{background:var(--calc-bg-input);border:1px solid var(--calc-border-default);color:var(--calc-text-dim);cursor:pointer;border-radius:999px;padding:.45rem 1rem;font-size:.82rem;font-weight:600;transition:border-color .15s,color .15s,background .15s}.mode-chip:hover{color:var(--calc-text-primary)}.mode-chip.active{background:var(--accent);border-color:var(--accent);color:#0a0e1a}.form-group.hidden,#grpSolveVmax.hidden,#grpSolveKm.hidden,#grpSolveS.hidden{display:none}.hero-result{text-align:center;padding:1.25rem 0}.hero-value{font-family:var(--calc-font-mono);color:var(--accent);font-size:clamp(2rem,5vw,2.8rem);font-weight:700}.hero-label{color:var(--calc-text-faded);margin-top:.35rem;font-size:.9rem}.stat-grid{grid-template-columns:repeat(3,1fr);gap:.75rem;margin-bottom:1.25rem;display:grid}@media (width<=600px){.stat-grid{grid-template-columns:1fr}}.stat-cell{background:var(--calc-bg-glass,#ffffff08);border-radius:var(--calc-radius-md);text-align:center;padding:.75rem}.stat-val{font-family:var(--calc-font-mono);color:var(--calc-text-primary);font-size:1.15rem;font-weight:700}.stat-lbl{color:var(--calc-text-dim);margin-top:.2rem;font-size:.72rem}.formula-strip{flex-wrap:wrap;gap:.6rem;margin-bottom:1rem;display:flex}.f-pill{background:var(--calc-bg-glass,#ffffff08);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-md);flex-direction:column;gap:.15rem;padding:.55rem .9rem;display:flex}.f-eq{font-family:var(--calc-font-mono);color:var(--accent);font-size:.92rem}.f-lbl{color:var(--calc-text-dim);font-size:.72rem}.result-interpretation{background:var(--calc-bg-glass,#ffffff08);border-left:3px solid var(--accent);border-radius:var(--calc-radius-md);color:var(--calc-text-dim);padding:.75rem 1rem;font-size:.88rem;line-height:1.6}.chart-inner{margin-top:.5rem}.action-bar{border-top:1px solid var(--calc-border-default);flex-wrap:wrap;gap:.5rem;margin-top:1.25rem;padding-top:1rem;display:flex}.act-btn{background:var(--calc-bg-input);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-md);color:var(--calc-text-dim);cursor:pointer;padding:.5rem .9rem;font-size:.82rem;transition:border-color .15s,color .15s}.act-btn:hover{border-color:var(--accent);color:var(--calc-text-primary)}[data-theme=light] .stat-cell,[data-theme=light] .f-pill,[data-theme=light] .result-interpretation{background:#f0f4f9}[data-theme=light] .input-card,[data-theme=light] .result-card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .glass-input,[data-theme=light] .preset-chip,[data-theme=light] .mode-chip{background:#f0f4f9;border-color:#00000026}[data-theme=light] .mode-chip.active{color:#fff}[data-theme=light] .act-btn{background:#f0f4f9;border-color:#00000026}.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-dim);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-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}[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:#a21caf59;box-shadow:0 2px 10px #a21caf14}[data-theme=light] .faq-item[open]{border-color:#a21caf66 #a21caf66 #a21caf66 #a21caf;border-left-style:solid;border-left-width:3px;box-shadow:0 2px 12px #a21caf1a}[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:#a21caf}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}