:root{
  --bg:#f3f7f4;
  --card:#ffffff;
  --text:#14211a;
  --muted:#415a4d;
  --line:#d7e3dc;
  --accent:#2f7d55;
  --shadow:0 8px 24px rgba(20,33,26,.08);
  --radius:16px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.5;
}

.container{
  max-width:1100px;
  margin:0 auto;
  padding:0 16px;
}

.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(243,247,244,.92);
  backdrop-filter:saturate(120%) blur(8px);
  border-bottom:1px solid var(--line);
}

.header-row{
  display:flex;
  align-items:center;
  gap:12px;
  padding:10px 0;
}

.logo img{
  display:block;
  border-radius:14px;
  box-shadow:var(--shadow);
}

.burger{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:999px;
  padding:10px 12px;
  cursor:pointer;
  box-shadow:var(--shadow);
}

.burger-line{
  display:block;
  width:18px;
  height:2px;
  background:var(--text);
  border-radius:2px;
}
.burger-text{font-size:14px;color:var(--muted)}

.menu{
  position:fixed;
  top:78px;
  right:0;
  height:calc(100vh - 78px);
  width:min(360px, 92vw);
  background:var(--card);
  border-left:1px solid var(--line);
  box-shadow:var(--shadow);
  transform:translateX(110%);
  transition:transform .2s ease;
  z-index:100;
  padding:12px;
  display:block;
}

.menu.open{transform:translateX(0)}

.menu-list{
  list-style:none;
  margin:0;
  padding:6px 0 0 0;
  display:grid;
  grid-template-columns:1fr;
  gap:6px;
  max-height:calc(100vh - 78px - 24px);
  overflow:auto;
}

.menu a{
  display:block;
  padding:10px 12px;
  border-radius:12px;
  text-decoration:none;
  color:var(--text);
  border:1px solid var(--line);
  background:#fff;
}
.menu a:hover{background:#f7fbf8}

.backdrop{
  position:fixed;
  inset:0;
  background:rgba(20,33,26,.35);
  display:none;
  z-index:90;
}
.backdrop.open{display:block}

body.menu-open{overflow:hidden}

.block{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:18px;
  margin:18px 0;
}

.intro h1{
  margin:0 0 10px 0;
  font-size:28px;
  letter-spacing:.2px;
}
.intro p{
  margin:0;
  color:var(--muted);
  max-width:100%;
  white-space:normal;
  overflow:visible;
}

.breadcrumbs{
  margin:18px 0 0 0;
  font-size:14px;
  color:var(--muted);
}
.breadcrumbs a{
  color:var(--muted);
  text-decoration:none;
}
.breadcrumbs a:hover{color:var(--text)}
.breadcrumbs .sep{margin:0 8px}
.breadcrumbs .current{color:var(--text)}

.heroimg img{
  width:100%;
  height:auto;
  display:block;
  border-radius:14px;
  border:1px solid var(--line);
}

.table-wrap{
  overflow:auto;
  border-radius:14px;
  border:1px solid var(--line);
}

table{
  width:100%;
  border-collapse:collapse;
  min-width:720px;
  background:#fff;
}
th,td{
  padding:12px 12px;
  border-bottom:1px solid var(--line);
  text-align:left;
  vertical-align:top;
}
th{
  background:#f6fbf7;
  color:var(--muted);
  font-weight:600;
}

.btn{
  display:inline-block;
  padding:8px 10px;
  border-radius:999px;
  background:#e9f6ee;
  border:1px solid #cfe8d8;
  color:#1f5a3e;
  font-size:13px;
  user-select:none;
}

.content h2{margin:0 0 10px 0}
.content p{margin:0}
.content + .content{margin-top:16px}

.content a{
  text-decoration:underline;
  color:var(--accent);
}

.calc{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  max-width:640px;
}
.calc label{
  display:grid;
  gap:6px;
  color:var(--muted);
  font-size:14px;
}
.calc input, .calc select{
  font:inherit;
  padding:10px 10px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
}
.calc-result{
  border:1px dashed #cfe8d8;
  border-radius:14px;
  padding:12px;
  background:#f7fbf8;
}
.calc-line{display:flex;justify-content:space-between;gap:10px}
.hint{color:var(--muted);font-size:13px;margin-top:6px}

.accordion{display:grid;gap:10px}
.acc-item{
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  background:#fff;
}
.acc-btn{
  width:100%;
  text-align:left;
  padding:12px 14px;
  font:inherit;
  background:#f6fbf7;
  border:0;
  cursor:pointer;
}
.acc-panel{
  display:none;
  padding:12px 14px;
  color:var(--muted);
}
.acc-item.open .acc-panel{display:block}

.site-footer{
  border-top:1px solid var(--line);
  padding:18px 0;
  background:rgba(243,247,244,.92);
}

.footer-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  justify-content:space-between;
}

.site-footer a{
  color:var(--muted);
  text-decoration:none;
}
.site-footer a:hover{color:var(--text)}
.foot-sep{margin:0 8px;color:var(--line)}

.contact{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  max-width:640px;
}
.contact label{
  display:grid;
  gap:6px;
  color:var(--muted);
  font-size:14px;
}
.contact input, .contact textarea{
  font:inherit;
  padding:10px 10px;
  border-radius:12px;
  border:1px solid var(--line);
  background:#fff;
  resize:vertical;
}
.submit{
  font:inherit;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid #cfe8d8;
  background:#e9f6ee;
  color:#1f5a3e;
  cursor:pointer;
  width:max-content;
}
.submit:hover{filter:brightness(.98)}


@media (min-width: 760px){
  .menu-list{grid-template-columns:1fr 1fr;}
}
@media (min-width: 1100px){
  .menu-list{grid-template-columns:1fr 1fr 1fr;}
}