*{box-sizing:border-box}:root{--bg:#f4f7f6;--surface:#fff;--text:#13251f;--muted:#60736d;--accent:#0b6b53;--accent-dark:#07503e;--accent-soft:#e7f4ef;--border:#d9e4e0;--shadow:0 18px 45px rgba(16,43,34,.09);--highlight:#d1495b}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.55}button,input,select{font:inherit}.container{width:min(1120px,calc(100% - 32px));margin:0 auto}.narrow{width:min(860px,calc(100% - 32px))}
.site-header{background:rgba(255,255,255,.94);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.header-inner{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{color:var(--text);text-decoration:none;font-weight:800;letter-spacing:-.03em;font-size:1.15rem}.brand span{color:var(--accent)}.nav{display:flex;gap:18px;align-items:center}.nav a{color:var(--muted);text-decoration:none;font-size:.9rem;font-weight:650;white-space:nowrap}.nav a:hover{color:var(--accent)}.nav a.active{color:var(--accent);font-weight:800}
.hero{padding:72px 0 40px;text-align:center}.eyebrow{display:inline-flex;padding:7px 12px;background:var(--accent-soft);color:var(--accent-dark);border-radius:999px;font-size:.75rem;font-weight:800;letter-spacing:.08em}h1{font-size:clamp(2.45rem,7vw,4.5rem);line-height:.98;letter-spacing:-.055em;margin:22px 0 18px}.page-title{font-size:clamp(2.2rem,6vw,3.8rem)}.intro{max-width:650px;margin:0 auto 32px;color:var(--muted);font-size:1.05rem}
.calculator-card,.result-card,.content-card{background:var(--surface);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow)}.calculator-card{text-align:left;padding:26px}.field label{display:block;font-size:.84rem;font-weight:750;margin-bottom:8px}.money-input{position:relative}.money-input span{position:absolute;left:18px;top:50%;transform:translateY(-50%);font-size:1.3rem;font-weight:750;color:var(--muted)}input,select{width:100%;height:56px;border:1px solid var(--border);background:#fbfcfc;border-radius:14px;padding:0 16px;color:var(--text);outline:none}.money-input input{padding-left:40px;font-size:1.22rem;font-weight:750}.year-grid{display:grid;grid-template-columns:1fr 44px 1fr;gap:12px;align-items:end;margin-top:20px}.swap-wrap{display:flex;align-items:center;justify-content:center;height:56px}.swap-button{width:42px;height:42px;border-radius:50%;border:1px solid var(--border);background:#fff;cursor:pointer;color:var(--accent);font-size:1.1rem}.primary-button{width:100%;margin-top:22px;border:0;border-radius:14px;min-height:56px;padding:0 20px;font-weight:800;background:var(--accent);color:#fff;cursor:pointer}
.result-card{margin-top:18px;padding:30px 26px}.result-label{color:var(--muted);margin:0 auto 6px;max-width:580px}.result-value{font-size:clamp(2.7rem,9vw,5rem);font-weight:850;letter-spacing:-.055em;color:var(--accent);margin:5px 0}.result-subtext{color:var(--muted);margin:0 0 24px}.result-stats{border-top:1px solid var(--border);padding-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:16px}.result-stats>div{display:flex;flex-direction:column;gap:4px}.stat-label{color:var(--muted);font-size:.82rem}
.content-section{padding:16px 0 72px}.content-card{padding:28px;margin-top:20px;box-shadow:none}.content-card h2{margin:0 0 12px;font-size:1.35rem}.content-card p{color:var(--muted);margin:0}.section-copy{margin-bottom:10px!important}.chart-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.chart-caption{font-size:.9rem;color:var(--muted);margin-top:3px}.chart-legend{display:flex;gap:20px;flex-wrap:wrap;font-size:.86rem;color:var(--muted);margin:14px 0 6px}.chart-legend span{display:flex;align-items:center;gap:7px}.legend-line{width:24px;height:3px;background:var(--accent);border-radius:3px;display:inline-block}.legend-dot{width:10px;height:10px;background:var(--highlight);border-radius:50%;display:inline-block}
.chart-wrap{width:100%;height:390px;margin-top:8px;position:relative}.chart-wrap svg{display:block;width:100%;height:100%}.chart-grid{stroke:#e4ece8;stroke-width:1}.chart-axis{stroke:#9aaca5;stroke-width:1}.chart-label{fill:#6b7f77;font-size:12px}.chart-line{fill:none;stroke:var(--accent);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.chart-area{fill:#e7f4ef}.chart-point{fill:var(--highlight);stroke:#fff;stroke-width:3}.chart-tooltip{position:absolute;display:none;background:#10251f;color:white;padding:7px 9px;border-radius:8px;font-size:.8rem;pointer-events:none;white-space:nowrap;z-index:4}
.formula{margin-top:18px;border-radius:12px;background:var(--accent-soft);color:var(--accent-dark);padding:15px 16px;font-weight:700}.quick-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:16px}.quick-calc{border:1px solid var(--border);background:#fbfcfc;border-radius:12px;padding:14px 16px;text-align:left;font-weight:700;color:var(--text);cursor:pointer}.small{font-size:.88rem;margin-top:12px!important}.text-link{color:var(--accent);font-weight:700;text-decoration:none}.text-link:hover{text-decoration:underline}
footer{background:#10251f;color:#d8e6e1;padding:26px 0;font-size:.86rem}.footer-inner{display:flex;justify-content:space-between;gap:16px}
@media(max-width:640px){.header-inner{align-items:center}.brand{font-size:1rem}.nav{gap:10px}.nav a{font-size:.78rem}.nav a:first-child{display:none}.hero{padding-top:48px}.calculator-card{padding:20px}.year-grid{grid-template-columns:1fr 38px 1fr;gap:8px}.result-stats,.quick-links{grid-template-columns:1fr}.chart-wrap{height:300px}.footer-inner{flex-direction:column}}
.download-card{display:flex;align-items:center;justify-content:space-between;gap:24px}
.download-copy{max-width:610px}
.download-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border-radius:12px;background:var(--accent);color:#fff;text-decoration:none;font-weight:800;white-space:nowrap}
.download-button:hover{background:var(--accent-dark)}
@media(max-width:640px){.download-card{flex-direction:column;align-items:stretch}.download-button{width:100%}}

.lookup-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}
.lookup-result{margin-top:18px;padding:20px;border-radius:16px;background:var(--accent-soft)}
.lookup-result .big-price{font-size:2.3rem;font-weight:850;letter-spacing:-.04em;color:var(--accent);margin:3px 0}
.fuel-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}
.fuel-tab{border:1px solid var(--border);background:#fff;border-radius:999px;padding:9px 14px;font-weight:750;cursor:pointer;color:var(--text)}
.fuel-tab.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.data-table-wrap{overflow-x:auto;margin-top:16px}.data-table{width:100%;border-collapse:collapse;font-size:.94rem}
.data-table th,.data-table td{padding:11px 12px;border-bottom:1px solid var(--border);text-align:right}
.data-table th:first-child,.data-table td:first-child{text-align:left}.data-table th{background:#f7faf9;font-weight:800;position:sticky;top:0}
.answer-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px}.answer-card{padding:18px;border:1px solid var(--border);border-radius:14px;background:#fbfcfc}
.answer-card h3{margin:0 0 6px;font-size:1rem}.answer-card p{margin:0!important}
.source-note{font-size:.82rem;color:var(--muted);margin-top:14px!important}
@media(max-width:640px){.lookup-grid,.answer-grid{grid-template-columns:1fr}}

.footer-links{display:flex;justify-content:center;gap:18px;flex-wrap:wrap;margin-top:14px}
.footer-links a{color:#d8e6e1;text-decoration:none;font-size:.84rem}
.footer-links a:hover{text-decoration:underline}

.seo-copy-card h3{margin:24px 0 8px;font-size:1.08rem;letter-spacing:-.01em}
.faq-card details{border-top:1px solid var(--border);padding:14px 0}
.faq-card details:first-of-type{margin-top:10px}
.faq-card summary{cursor:pointer;font-weight:800;color:var(--text)}
.faq-card details p{margin-top:10px!important}