:root{--c:#1fb8d8;--g:#0c9a78;--gd:#0a6f80;--gl:#e7f7f6;--t:#16282b;--m:#566a6d;--b:#cfe6e4}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,Roboto,sans-serif;color:var(--t);line-height:1.6;background:#fff}
a{color:var(--gd)}.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--b);z-index:10}
header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:62px;flex-wrap:wrap}
.logo{font-weight:800;color:var(--g);text-decoration:none;font-size:1.15rem}
nav a{margin-left:18px;text-decoration:none;color:var(--t);font-weight:600;padding:6px 0;border-bottom:2px solid transparent}
nav a:hover,nav a.on{color:var(--g);border-color:var(--g)}
.hero{background:linear-gradient(120deg,#0a6f9a,#0c9a78 55%,#5bb82a);color:#fff;padding:64px 0}
.hero h1{margin:0 0 10px;font-size:clamp(1.8rem,5vw,2.8rem)}.hero p{max-width:640px;opacity:.95}
.btn{display:inline-block;background:#fff;color:var(--gd);padding:10px 22px;border-radius:8px;font-weight:700;text-decoration:none;border:0;cursor:pointer;font-size:1rem}
.btn.p{background:var(--g);color:#fff}
section{padding:42px 0}h2{color:var(--gd);margin-top:0}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(min(230px,100%),1fr))}
.card{background:#fff;border:1px solid var(--b);border-radius:12px;padding:20px;box-shadow:0 2px 8px rgba(20,99,58,.06)}
.card h3{margin-top:0;color:var(--g)}.alt{background:var(--gl)}
.ph{background:#fff3c4;padding:1px 6px;border-radius:4px;font-size:.92em}
.note{background:#fff8e1;border-left:4px solid #e0a800;padding:12px 16px;border-radius:6px;font-size:.93rem}
dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px}dt{font-weight:700}dd{margin:0}
form.calc{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(min(220px,100%),1fr))}
label{display:block;font-weight:600;font-size:.92rem}
input,select{width:100%;padding:9px;border:1px solid var(--b);border-radius:8px;font-size:1rem;margin-top:4px}
.res{margin-top:22px}.res .big{font-size:1.4rem;color:var(--gd);font-weight:800}
table{border-collapse:collapse;width:100%;font-size:.93rem}th,td{border:1px solid var(--b);padding:6px 10px;text-align:center}
th{background:var(--gl)}tr.hit td{background:#c9ecd5;font-weight:700}.tw{overflow-x:auto}
.post{border-bottom:1px solid var(--b);padding:18px 0}.post time{color:var(--m);font-size:.88rem}
.tag{background:#fff3c4;font-size:.75rem;padding:2px 8px;border-radius:10px;margin-left:6px}
footer{background:var(--gd);color:#fff;padding:26px 0;margin-top:30px;font-size:.93rem}
footer a{color:#cdeed9}
@media(max-width:600px){nav a{margin:0 12px 0 0;font-size:.92rem}header .wrap{padding-bottom:8px}}
textarea{width:100%;padding:9px;border:1px solid var(--b);border-radius:8px;font:inherit;margin-top:4px}
.err{color:#b3261e;display:block;min-height:1em}input.bad,select.bad,textarea.bad{border-color:#b3261e}
.badge{display:inline-block;background:var(--g);color:#fff;font-size:.78rem;font-weight:700;padding:2px 10px;border-radius:10px}
.logo{display:flex;align-items:center;gap:10px}.logo-img{display:block;width:auto;height:40px}
.foot-logo{display:block;width:auto;height:36px;margin-bottom:8px;background:#fff;border-radius:8px;padding:4px 8px}
header.site{border-bottom:3px solid transparent;border-image:linear-gradient(90deg,#1fb8d8,#5bb82a) 1}
.btn.p{background:linear-gradient(90deg,#0a8fb0,#0c9a78)}.badge{background:linear-gradient(90deg,#1fb8d8,#3aa84a)}
footer{background:linear-gradient(120deg,#0a5f70,#0a6f80 50%,#2c7d3a)}
.post .src{font-size:.88rem;color:var(--m);margin:6px 0}
section h1{color:var(--gd);margin-top:0}.lead{max-width:760px;color:var(--m);font-size:1.05rem}
.foot-nav{margin:10px 0}.foot-nav a{color:#cdeed9}.card h3 a{text-decoration:none;color:var(--g)}

/* ===== Responsive / mobile ===== */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{overflow-x:hidden;font-size:16px}
img,svg,video{max-width:100%;height:auto}
.logo-img,.foot-logo{max-width:none}
h1,h2,h3,p,li,dd,dt,a,.card,.post{overflow-wrap:anywhere;word-break:normal}
.btn{text-align:center}
.nav-toggle{display:none;background:none;border:1px solid var(--b);border-radius:8px;width:44px;height:44px;padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--gd);border-radius:2px;transition:transform .2s,opacity .2s}
.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-open .nav-toggle span:nth-child(2){opacity:0}
.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.tw{max-width:100%;-webkit-overflow-scrolling:touch}
@media(max-width:900px){
 nav a{margin-left:12px;font-size:.95rem}
}
@media(max-width:720px){
 .wrap{padding:0 16px}
 header .wrap{flex-wrap:wrap;min-height:60px;padding-top:8px;padding-bottom:8px;gap:8px}
 .logo{font-size:1rem;flex:1 1 0;min-width:0}
 .js .nav-toggle{display:flex}
 .js nav{display:none;flex:0 0 100%;order:3;flex-direction:column;border-top:1px solid var(--b);margin-top:4px}
 .js.nav-open nav{display:flex}
 nav{display:flex;flex-wrap:wrap;gap:0 14px;flex:0 0 100%;order:3}
 .js nav a{margin:0;padding:13px 4px;border-bottom:1px solid var(--b);font-size:1rem}
 .js nav a.on{border-bottom-color:var(--g)}
 nav a{margin:0}
 .hero{padding:40px 0}.hero .btn{display:block;width:100%}
 section{padding:28px 0}
 h1,section h1,.hero h1{font-size:1.65rem;line-height:1.25}h2{font-size:1.35rem}
 .grid,form.calc{grid-template-columns:1fr}
 .card{padding:16px}
 dl{grid-template-columns:1fr;gap:2px}dt{margin-top:10px}dt:first-child{margin-top:0}
 button.btn,form .btn,.post .btn{display:block;width:100%;padding:13px 16px}
 th,td{padding:6px 7px;font-size:.85rem}
 .res .big{font-size:1.2rem}
 footer{text-align:center}.foot-logo{margin-left:auto;margin-right:auto}
 .foot-nav{display:flex;flex-direction:column;gap:6px;margin:12px 0}
 .foot-nav a{display:block;padding:4px 0}
}
@media(max-width:360px){
 .wrap{padding:0 12px}
 .logo-img{height:34px}.logo{font-size:.92rem;gap:6px}
 h1,section h1,.hero h1{font-size:1.45rem}
}
button,input,select,textarea{font-family:inherit}