*{box-sizing:border-box}
:root{--bg:#f6f7f9;--card:#fff;--text:#111318;--muted:#6b7280;--accent:#16856b;--line:#e5e7eb;--soft:#eef8f5;--warn:#fff8e7}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit} a{color:inherit}
.site-header{max-width:1040px;margin:auto;padding:28px 24px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{color:var(--text);text-decoration:none;font-weight:800;letter-spacing:-.04em;font-size:20px}.header-link{font-size:13px;font-weight:700;color:var(--muted);text-decoration:none}.header-link:hover{color:var(--accent)}
main{max-width:1040px;margin:auto;padding:20px 24px 80px}.hero{text-align:center;padding:58px 0 35px}.eyebrow,.section-kicker{font-size:12px;font-weight:800;letter-spacing:.16em;color:var(--accent);margin:0 0 14px;text-transform:uppercase}
h1{font-size:clamp(54px,9vw,104px);line-height:.92;letter-spacing:-.07em;margin:0;font-weight:800}h1 strong{color:var(--accent)}.lead{color:var(--muted);font-size:18px;margin:24px auto 0;max-width:660px;line-height:1.55}
.calculator{max-width:720px;margin:42px auto 0;background:var(--card);border:1px solid var(--line);border-radius:26px;padding:28px;box-shadow:0 12px 40px rgba(17,19,24,.05);text-align:left}.calculator.wide{max-width:820px}
.mode-switch{display:grid;grid-template-columns:repeat(var(--cols,2),1fr);background:var(--bg);padding:4px;border-radius:12px;margin-bottom:25px;gap:4px}.mode{border:0;background:transparent;padding:12px 10px;border-radius:9px;font-weight:800;color:var(--muted);cursor:pointer}.mode.active{background:var(--card);color:var(--text);box-shadow:0 2px 10px rgba(0,0,0,.06)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-grid.three{grid-template-columns:repeat(3,1fr)}.field{min-width:0}.field.full{grid-column:1/-1}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:8px}.field small{display:block;color:var(--muted);font-size:12px;margin-top:7px;line-height:1.45}
.input-shell{display:flex;align-items:center;border:1px solid var(--line);border-radius:14px;background:#fafafa;overflow:hidden}.input-shell:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(22,133,107,.1)}.input-shell input,.input-shell select{width:100%;min-width:0;border:0;outline:0;background:transparent;padding:15px 16px;font-size:18px;font-weight:750;color:var(--text)}.input-shell select{cursor:pointer}.input-shell span{padding:0 15px;color:var(--muted);font-weight:700;white-space:nowrap}
.rates,.quick-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:14px}.rate,.quick-buttons button,.calc-button{border:1px solid var(--line);background:var(--card);padding:12px;border-radius:11px;font-weight:800;cursor:pointer;color:var(--text)}.rate.active{background:var(--text);border-color:var(--text);color:#fff}.rate:hover,.quick-buttons button:hover{border-color:var(--accent)}.calc-button{width:100%;margin-top:18px;background:var(--text);border-color:var(--text);color:#fff}.calc-button:hover{opacity:.9}
.result-main{text-align:center;padding:35px 15px 28px}.result-main span{display:block;color:var(--muted);font-size:13px;margin-bottom:7px}.result-main strong{display:block;color:var(--accent);font-size:clamp(36px,7vw,62px);letter-spacing:-.055em;overflow-wrap:anywhere}.result-main em{display:block;margin-top:8px;color:var(--muted);font-style:normal;font-size:13px}.result-grid{display:grid;grid-template-columns:repeat(var(--result-cols,3),1fr);border:1px solid var(--line);border-radius:15px;overflow:hidden}.result-grid>div{padding:15px 10px;text-align:center}.result-grid>div+div{border-left:1px solid var(--line)}.result-grid span{display:block;font-size:11px;color:var(--muted);margin-bottom:5px}.result-grid strong{font-size:14px;overflow-wrap:anywhere}
.notice{max-width:720px;margin:18px auto 0;padding:14px 16px;border-radius:14px;background:var(--soft);color:#315b50;font-size:13px;line-height:1.55}.notice.warn{background:var(--warn);color:#6f5518}.status{font-size:12px;color:var(--muted);margin-top:10px;text-align:center}
.examples{text-align:center;margin-top:55px}.examples h2,.info-card h2,.info h2,.category h2{font-size:clamp(27px,4vw,40px);letter-spacing:-.045em;margin:0 0 22px}.example-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:9px}.example-grid button{border:1px solid var(--line);background:var(--card);padding:12px;border-radius:11px;font-weight:800;cursor:pointer;color:var(--text)}.example-grid button:hover{border-color:var(--accent)}
.info-card{display:grid;grid-template-columns:1fr 1fr;gap:45px;background:var(--card);border:1px solid var(--line);border-radius:26px;padding:42px;margin-top:55px}.info-copy p,.info-copy li{margin:0 0 14px;color:var(--muted);line-height:1.65}.info-copy strong{color:var(--text)}.info-copy ul{padding-left:20px;margin:0}.info{max-width:760px;margin:70px auto 0;text-align:center}.info p{color:var(--muted);line-height:1.75}
.category{margin-top:50px}.category-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px}.category-head h2{margin:0}.category-head p{color:var(--muted);margin:0;font-size:14px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.tool-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;text-decoration:none;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}.tool-card:hover{transform:translateY(-2px);border-color:#c9d0d5;box-shadow:0 10px 28px rgba(17,19,24,.05)}.tool-card .icon{width:36px;height:36px;border-radius:11px;background:var(--soft);display:grid;place-items:center;color:var(--accent);font-weight:900;margin-bottom:26px}.tool-card h3{font-size:19px;letter-spacing:-.03em;margin:0 0 7px}.tool-card p{font-size:13px;color:var(--muted);line-height:1.55;margin:0}.tool-card.featured{grid-column:span 2}.tool-card.featured h3{font-size:25px}.search-wrap{max-width:620px;margin:34px auto 0}.search-wrap .input-shell input{font-size:16px;font-weight:600}.hidden-card{display:none}
footer{max-width:1040px;margin:auto;padding:28px 24px 38px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}
@media(max-width:760px){.site-header{padding:22px 18px}.header-link{display:none}main{padding:5px 18px 60px}.hero{padding:45px 0 25px}h1{font-size:clamp(48px,16vw,80px)}.calculator{padding:20px 16px;border-radius:20px;margin-top:32px}.form-grid,.form-grid.three{grid-template-columns:1fr}.field.full{grid-column:auto}.rates,.quick-buttons{grid-template-columns:repeat(2,1fr)}.result-main strong{font-size:clamp(35px,11vw,52px)}.result-grid{grid-template-columns:1fr}.result-grid>div+div{border-left:0;border-top:1px solid var(--line)}.example-grid{grid-template-columns:repeat(2,1fr)}.info-card{grid-template-columns:1fr;gap:12px;padding:27px 22px;border-radius:20px}.card-grid{grid-template-columns:1fr}.tool-card.featured{grid-column:auto}.category-head{align-items:start;flex-direction:column}.mode-switch{overflow-x:auto}.mode{min-width:105px}footer{padding:24px 18px 32px;flex-direction:column}}