:root{--bg:#f6f7f5;--card:#fff;--text:#152019;--muted:#64706a;--line:#dfe5df;--brand:#176b47;--brand2:#0e5236;--soft:#e9f3ed;--danger:#8b3d2f;--shadow:0 12px 30px rgba(21,32,25,.07);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}.container{width:min(1120px,92%);margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(246,247,245,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(223,229,223,.85)}.nav{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:24px}.logo{font-weight:900;letter-spacing:-.04em;font-size:1.35rem;color:var(--text);text-decoration:none}.logo span{color:var(--brand)}nav{display:flex;gap:20px;align-items:center}nav a{color:var(--muted);text-decoration:none;font-weight:700;font-size:.95rem}nav a:hover{color:var(--text)}.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:12px;padding:12px 16px;font-weight:800;text-decoration:none;cursor:pointer;transition:.18s ease;font:inherit}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand2);transform:translateY(-1px)}.btn-secondary{background:var(--card);color:var(--text);border-color:var(--line)}.btn-secondary:hover{border-color:#b9c6bc}.hero{padding:82px 0 48px}.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:center}.eyebrow{display:inline-flex;padding:7px 10px;border-radius:999px;background:var(--soft);color:var(--brand);font-size:.78rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.hero h1{font-size:clamp(3rem,7vw,5.6rem);line-height:.97;letter-spacing:-.06em;margin:18px 0}.hero p{font-size:1.14rem;color:var(--muted);max-width:650px}.hero-card{background:linear-gradient(145deg,#15352a,#1d6848);color:#fff;border-radius:26px;padding:28px;box-shadow:var(--shadow);min-height:340px;display:flex;flex-direction:column;justify-content:space-between}.hero-card .big{font-size:4rem;font-weight:900;letter-spacing:-.07em}.hero-card p{color:rgba(255,255,255,.78);font-size:1rem}.section{padding:56px 0}.section h2{font-size:2rem;letter-spacing:-.04em;margin:0 0 10px}.section-lead{color:var(--muted);max-width:720px;margin-bottom:28px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 22px rgba(21,32,25,.035)}.tool-card{display:flex;flex-direction:column;min-height:190px}.tool-card h3{margin:0 0 8px}.tool-card p{margin:0;color:var(--muted);flex:1}.tool-card a{margin-top:18px;align-self:flex-start}.tag{display:inline-block;font-size:.75rem;font-weight:900;color:var(--brand);background:var(--soft);border-radius:999px;padding:5px 8px;margin-bottom:10px}.footer{border-top:1px solid var(--line);margin-top:40px;padding:36px 0 60px;color:var(--muted);font-size:.9rem}.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.tool-header{padding:60px 0 22px}.tool-header h1{font-size:clamp(2.4rem,5vw,4rem);letter-spacing:-.055em;line-height:1;margin:12px 0}.tool-header p{max-width:760px;color:var(--muted);font-size:1.08rem}.calculator{display:grid;grid-template-columns:.95fr 1.05fr;gap:22px;padding-bottom:55px}.form-card,.result-card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px}.field{margin-bottom:16px}.field label{display:block;font-weight:800;margin-bottom:7px}.field input,.field select{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--text);font:inherit}.field small{display:block;color:var(--muted);margin-top:5px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.result-empty{color:var(--muted);padding:30px 6px}.result{display:none}.result.show{display:block}.result-kpi{font-size:3rem;font-weight:900;letter-spacing:-.06em;margin:6px 0}.result-label{color:var(--muted);font-weight:800}.result-note{border-left:4px solid var(--brand);background:var(--soft);padding:12px 14px;border-radius:0 12px 12px 0;color:#28533f;margin-top:18px}.source-note{font-size:.84rem;color:var(--muted);margin-top:22px}.source-note a{color:var(--brand)}.crumbs{padding-top:22px;color:var(--muted);font-size:.88rem}.crumbs a{color:var(--muted)}.notice{background:#fff8ea;border:1px solid #efd49d;padding:15px 16px;border-radius:14px;color:#6c5423;margin:20px 0}.site-search{margin:18px 0 30px;display:flex;gap:10px}.site-search input{flex:1;padding:14px;border:1px solid var(--line);border-radius:12px;font:inherit}.muted{color:var(--muted)}@media(max-width:850px){.hero-grid,.calculator{grid-template-columns:1fr}.grid-3{grid-template-columns:1fr 1fr}.nav{min-height:64px}nav{gap:12px}.hero{padding-top:55px}}@media(max-width:620px){.grid-3,.grid-2,.form-row{grid-template-columns:1fr}.hero h1{font-size:3.2rem}.hero-card .big{font-size:3rem}.container{width:min(94%,1120px)}}

.result.show + .result-empty{display:none}

.article-wrap{padding:34px 0 70px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}.article{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:clamp(24px,4vw,42px);box-shadow:0 8px 22px rgba(21,32,25,.035)}.article h1{font-size:clamp(2.4rem,5vw,4.4rem);line-height:1;letter-spacing:-.055em;margin:10px 0 14px}.article h2{font-size:1.65rem;letter-spacing:-.035em;margin:34px 0 10px}.article h3{font-size:1.18rem;margin:24px 0 8px}.article p,.article li{color:#334239}.article ul,.article ol{padding-left:22px}.article li{margin:7px 0}.article table{width:100%;border-collapse:collapse;margin:18px 0 22px;font-size:.95rem}.article th,.article td{border:1px solid var(--line);padding:10px 11px;text-align:left;vertical-align:top}.article th{background:#f1f5f1}.article .formula{background:#13271f;color:#fff;border-radius:14px;padding:16px 18px;font-weight:800;overflow:auto}.article .callout{background:var(--soft);border:1px solid #cfe2d5;border-radius:15px;padding:15px 16px;margin:20px 0}.article .warning{background:#fff8ea;border:1px solid #efd49d;border-radius:15px;padding:15px 16px;margin:20px 0;color:#6c5423}.article a{color:var(--brand);font-weight:750}.article a.btn-primary{color:#fff}.article a.btn-primary:hover{color:#fff}.article .meta{color:var(--muted);font-size:.9rem}.sidebar{position:sticky;top:96px}.sidebar .card{margin-bottom:16px}.related{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px}.related .card{padding:18px}.related h3{margin:0 0 6px;font-size:1rem}.related p{font-size:.92rem;color:var(--muted);margin:0}.article-cta{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 4px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.guide-grid .card{display:flex;flex-direction:column}.guide-grid .card h3{margin:0 0 8px}.guide-grid .card p{flex:1}.guide-grid .tag{width:max-content}.guide-filter{margin:18px 0 26px;display:flex;gap:10px;flex-wrap:wrap}.guide-filter a{display:inline-flex;align-items:center;padding:9px 12px;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--text);font-weight:800;background:#fff}.guide-filter a:hover{border-color:#b9c6bc}.mini-list{margin:0;padding-left:18px}.mini-list li{margin:5px 0;color:var(--muted)}
@media(max-width:900px){.article-layout{grid-template-columns:1fr}.sidebar{position:static}.guide-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.guide-grid,.related{grid-template-columns:1fr}.article{padding:22px}.article h1{font-size:2.6rem}}