*{box-sizing:border-box;margin:0;padding:0}:root{--accent:var(--calc-color-construction)}body{color:var(--calc-text-primary);background:var(--calc-bg-page) radial-gradient(circle at 10% 20%, #22d3ee0f 0%, transparent 22%), radial-gradient(circle at 90% 80%, #a855f70f 0%, transparent 22%);min-height:100vh;font-family:Inter,sans-serif}a{color:inherit;text-decoration:none}input::-webkit-outer-spin-button,input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield;appearance:textfield}.breadcrumb-nav{max-width:1040px;margin:12px auto 0;padding:0 24px}.breadcrumb{color:var(--calc-text-dim);flex-wrap:wrap;gap:4px;font-size:.78rem;list-style:none;display:flex}.breadcrumb li+li:before{content:"›";margin-right:4px}.breadcrumb a{color:var(--calc-text-dim);transition:color .2s}.breadcrumb a:hover{color:var(--calc-cyan)}.epa-notice{max-width:1040px;color:var(--calc-text-dim);background:#f59e0b14;border:1px solid #f59e0b40;border-radius:8px;margin:14px auto 0;padding:10px 24px;font-size:.82rem;line-height:1.5}[data-theme=light] .epa-notice{color:#164e63;background:#fffbeb;border-color:#0891b24d}.calc-hero{text-align:center;padding:28px 24px 8px}.calc-title{background:linear-gradient(135deg, var(--calc-cyan) 0%, var(--purple) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:8px;font-size:2rem;font-weight:800}.calc-subtitle{color:var(--calc-text-dim);max-width:600px;margin:0 auto;font-size:.92rem}.tab-control{flex-wrap:wrap;gap:8px;max-width:1040px;margin:20px auto 16px;padding:0 24px;display:flex}.tab-btn{border:1px solid var(--calc-border-default);color:var(--calc-text-dim);cursor:pointer;background:0 0;border-radius:20px;padding:8px 18px;font-size:.85rem;font-weight:500;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.tab-btn:hover{color:var(--calc-text-primary);border-color:#ffffff40}.tab-btn.active{background:var(--accent);color:#000;border-color:var(--accent);font-weight:700}.tab-panel{display:none}.tab-panel.active{display:block}[data-theme=light] .tab-btn:hover{border-color:#00000040}[data-theme=light] .tab-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.calc-layout{grid-template-columns:1fr 1fr;gap:20px;max-width:1040px;margin:0 auto;padding:0 24px 32px;display:grid}.input-card,.result-card{border-radius:14px;padding:20px}.input-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-left:3px solid var(--calc-cyan)}.result-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-left:3px solid var(--purple)}[data-theme=light] .input-card,[data-theme=light] .result-card{box-shadow:0 2px 12px #00000014}.card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.card-title{font-size:1rem;font-weight:700}.field-group{flex-direction:column;gap:6px;margin-top:12px;display:flex}.field-group:first-child{margin-top:0}.field-label{color:var(--calc-text-dim);font-size:.8rem;font-weight:600}.field-hint{color:var(--calc-text-muted);font-size:.72rem;line-height:1.4}.glass-input,.glass-select{background:var(--input-bg);border:1px solid var(--calc-border-default);width:100%;height:40px;color:var(--calc-text-primary);border-radius:8px;outline:none;padding:6px 10px;font-size:.85rem;transition:border-color .2s}.glass-input:focus,.glass-select:focus{border-color:var(--accent)}.glass-select{color-scheme:dark;background-color:#0d0d1f}.glass-select option{background-color:#0d0d1f}[data-theme=light] .glass-input{color:#0f172a;background:#e8eef4}[data-theme=light] .glass-select{color-scheme:light;background-color:#e8eef4}[data-theme=light] .glass-select option{color:#0f172a;background-color:#e8eef4}.hero-result{text-align:center;border-bottom:1px solid var(--calc-border-default);margin-bottom:16px;padding:16px 0}.hero-label{color:var(--calc-text-dim);margin-bottom:4px;font-size:.78rem;display:block}.hero-value{font-size:2.8rem;font-weight:800;font-family:var(--font-mono);background:linear-gradient(135deg, var(--calc-cyan), var(--purple));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-unit{color:var(--calc-text-dim);margin-left:4px;font-size:.92rem}.hero-sublabel{color:var(--calc-text-dim);font-size:.82rem;font-family:var(--font-mono);margin-top:4px;display:block}.charge-status{letter-spacing:.02em;border-radius:20px;margin-top:6px;padding:3px 10px;font-size:.72rem;font-weight:600;display:inline-block}.charge-status--ok{color:#10b981;background:#10b9811f;border:1px solid #10b98140}.charge-status--warn{color:#f59e0b;background:#f59e0b1f;border:1px solid #f59e0b40}[data-theme=light] .charge-status--ok{color:#065f46;background:#f0fdf4;border-color:#16a34a4d}[data-theme=light] .charge-status--warn{color:#b45309;background:#fffbeb;border-color:#b453094d}.formula-strip{font-size:.74rem;font-family:var(--font-mono);color:var(--calc-text-dim);overflow-wrap:break-word;background:#22d3ee0a;border:1px solid #22d3ee1a;border-radius:8px;margin:10px 0 4px;padding:8px 10px;line-height:1.5}.formula-strip-label{color:var(--calc-text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:3px;font-size:.68rem}[data-theme=light] .formula-strip{background:#0891b20d;border-color:#0891b226}.result-row{border-bottom:1px solid #ffffff0a;justify-content:space-between;align-items:center;gap:8px;padding:7px 0;display:flex}[data-theme=light] .result-row{border-bottom-color:#0000000d}.result-label{color:var(--calc-text-dim);font-size:.8rem}.result-value{font-size:.88rem;font-weight:700;font-family:var(--font-mono)}.result-value.accent{color:var(--calc-cyan)}.stat-row-label{color:var(--calc-text-muted);text-transform:uppercase;letter-spacing:.06em;margin:10px 0 4px;font-size:.75rem}.divider{background:var(--calc-border-default);height:1px;margin:10px 0}.action-row{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.action-btn{border:1px solid var(--calc-border-default);color:var(--calc-text-primary);cursor:pointer;background:#ffffff0f;border-radius:8px;flex:1;padding:9px;font-size:.82rem;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.action-btn:hover{border-color:var(--accent);background:#ffffff1f}[data-theme=light] .action-btn{background:#f0f4f9;border-color:#00000026}[data-theme=light] .action-btn:hover{border-color:var(--accent);background:#e2eaf4}.reference-wrap{max-width:1040px;margin:0 auto;padding:0 24px 32px}.section-title{border-bottom:1px solid var(--calc-border-default);margin-bottom:12px;padding-bottom:8px;font-size:1rem;font-weight:700}.ref-table-wrap{margin-top:8px;overflow-x:auto}.ref-table{border-collapse:collapse;width:100%;font-size:.82rem}.ref-table th{text-align:left;color:var(--calc-text-dim);border-bottom:1px solid var(--calc-border-default);background:#ffffff0f;padding:8px 12px}.ref-table td{border-bottom:1px solid #ffffff0a;padding:7px 12px}.ref-table tr:hover td{background:#ffffff08}[data-theme=light] .ref-table th{color:#334155;background:#edf2f9;border-bottom-color:#0000001a}[data-theme=light] .ref-table td{color:#0f172a;border-bottom-color:#0000000d}[data-theme=light] .ref-table tr:hover td{background:#f0f4f9}.symptom-grid{grid-template-columns:1fr 1fr;gap:16px;margin-top:12px;display:grid}.symptom-card{border:1px solid var(--calc-border-default);border-radius:10px;padding:16px}.symptom-card.undercharge{background:#ef44440f;border-color:#ef444433}.symptom-card.overcharge{background:#f59e0b0f;border-color:#f59e0b33}.symptom-title{margin-bottom:10px;font-size:.88rem;font-weight:700}.symptom-card.undercharge .symptom-title{color:#f87171}.symptom-card.overcharge .symptom-title{color:#f59e0b}.symptom-list{flex-direction:column;gap:4px;padding-left:18px;display:flex}.symptom-list li{color:var(--calc-text-dim);font-size:.82rem;line-height:1.5}[data-theme=light] .symptom-card.undercharge{background:#fff1f2;border-color:#ef444440}[data-theme=light] .symptom-card.overcharge{background:#fffbeb;border-color:#f59e0b4d}[data-theme=light] .symptom-card.undercharge .symptom-title{color:#dc2626}[data-theme=light] .symptom-card.overcharge .symptom-title{color:#b45309}.safety-notice{color:var(--calc-text-dim);background:#ef44440f;border:1px solid #ef444433;border-radius:10px;margin-top:28px;padding:16px;font-size:.85rem;line-height:1.6}[data-theme=light] .safety-notice{color:#7f1d1d;background:#fff1f2;border-color:#ef444440}.faq-list{flex-direction:column;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:.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(--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(--calc-cyan)}.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__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}.toast{z-index:9999;border-radius:10px;padding:12px 20px;font-size:.85rem;font-weight:600;animation:.3s toastIn;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 20px #0006}.toast-success{color:#fff;background:#065f46;border:1px solid #10b981}.toast-warn{color:#fff;background:#155e75;border:1px solid #f59e0b}.toast-error{color:#fff;background:#7f1d1d;border:1px solid #ef4444}@keyframes toastIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.calc-related{margin-top:2rem}.related-grid{grid-template-columns:repeat(4,1fr);gap:10px;display:grid}.related-card{border:1px solid var(--calc-border-default);text-align:center;color:var(--calc-text-primary);background:#ffffff0a;border-radius:10px;flex-direction:column;align-items:center;gap:6px;padding:14px 10px;font-size:.78rem;font-weight:600;text-decoration:none;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s;display:flex}.related-card:hover{border-color:var(--accent);background:#22d3ee0f}.related-icon{font-size:1.4rem}[data-theme=light] .related-card{color:#0f172a;background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}[data-theme=light] .related-card:hover{background:#f0f4f9;border-color:#0891b266}@media (width<=900px){.calc-layout{grid-template-columns:1fr}.symptom-grid,.related-grid{grid-template-columns:1fr 1fr}}@media (width<=560px){.symptom-grid,.related-grid{grid-template-columns:1fr}}@media print{.glass-navbar,.calc-page-footer,.calc-back-to-top,.tab-nav,.tabs-outer,.outer-tab-nav,.tab-btn,.act-row2,.action-bar,.action-btn,.how-section,.formula-pills2,.gloss-section2,.faq-section,.faq-section-extra,.calc-related,.page-sections-outer{display:none}body{color:#000;background:#fff}.result-card,.stat-card,.card,.glass-card,.result-panel{box-shadow:none;page-break-inside:avoid;color:#000;background:#fff;border:1px solid #ccc}.stat-value,.stat-label,.result-value,h1,h2,h3{color:#000;text-shadow:none}.tab-panel{display:block}}[data-theme=light] .calc-section__icon{background:#edf2f9}.charge-gauge-container{border:1px solid var(--calc-border-default);background:#ffffff05;border-radius:10px;margin:0 0 14px;padding:10px 12px}.charge-gauge-track{border:1px solid #ffffff14;border-radius:11px;height:22px;display:flex;position:relative;overflow:hidden}.charge-gauge-pointer{background:var(--calc-text-primary);z-index:10;border-radius:2px;width:4px;height:26px;transition:left .4s cubic-bezier(.25,.8,.25,1);position:absolute;top:-2px;box-shadow:0 0 6px #ffffffb3}.charge-gauge-zone{text-transform:uppercase;letter-spacing:.06em;flex:1;justify-content:center;align-items:center;font-size:.6rem;font-weight:700;display:flex}.zone-under{color:#fff;background:linear-gradient(90deg,#ef4444,#f59e0b)}.zone-optimal{color:#fff;background:#10b981}.zone-over{color:#fff;background:linear-gradient(90deg,#f59e0b,#ef4444)}.charge-gauge-label{text-align:center;color:var(--calc-text-dim);margin-top:5px;font-size:.68rem;font-weight:600}[data-theme=light] .charge-gauge-container{background:#00000003;border-color:#0000001a}[data-theme=light] .charge-gauge-pointer{background:#0f172a;box-shadow:0 0 4px #0000004d}#fixed-orifice-inputs{background:#22d3ee0a;border:1px solid #22d3ee1f;border-radius:8px;margin-top:4px;padding:10px}[data-theme=light] #fixed-orifice-inputs{background:#0891b20a;border-color:#0891b226}.package-callout{color:var(--calc-text-dim);background:#fbbf240f;border:1px solid #fbbf2433;border-radius:8px;margin-top:10px;padding:10px 12px;font-size:.78rem;line-height:1.5}[data-theme=light] .package-callout{color:#78350f;background:#fffbeb;border-color:#b4530933}