:root{
  --red:#ea3b31; --orange:#f2a63a; --yellow:#f4e14b; --green:#88c46b; --blue:#3a67b8;
  --ink:#1d1f24; --mid:#555b66; --line:#e3e5e9; --paper:#ffffff; --tint:#f6f7f9;
  --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.55;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* brand bar: the five chevron colours */
.bar{display:flex;height:5px}
.bar span{flex:1}
.bar span:nth-child(1){background:var(--red)}
.bar span:nth-child(2){background:var(--orange)}
.bar span:nth-child(3){background:var(--yellow)}
.bar span:nth-child(4){background:var(--green)}
.bar span:nth-child(5){background:var(--blue)}

header{border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 0;gap:20px}
.nav .logo img{height:42px;width:auto}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:26px;flex-wrap:wrap}
.nav a{color:var(--ink);font-size:15px}
.nav a.on{border-bottom:2px solid var(--ink);padding-bottom:2px}
.nav a:hover{text-decoration:none;color:var(--blue)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:6px 10px;font-size:15px;cursor:pointer}

h1{font-size:2.3rem;line-height:1.15;font-weight:600;margin:0 0 14px;letter-spacing:-.01em}
h2{font-size:1.5rem;font-weight:600;margin:0 0 10px;letter-spacing:-.01em}
h3{font-size:1.1rem;font-weight:600;margin:0 0 6px}
p{margin:0 0 16px}
.lede{font-size:1.2rem;color:var(--mid);max-width:38em}
.sec{padding:56px 0;border-top:1px solid var(--line)}
.sec.tint{background:var(--tint)}
.hero{padding:56px 0 40px}
.hero .wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:44px;align-items:center}
.hero img{border-radius:6px}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.btn{display:inline-block;padding:11px 18px;border-radius:4px;border:1px solid var(--ink);color:var(--ink);font-size:15px}
.btn.primary{background:var(--ink);color:#fff}
.btn:hover{text-decoration:none;border-color:var(--blue);color:var(--blue)}
.btn.primary:hover{background:var(--blue);color:#fff}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.card{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff}
.card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.card .body{padding:16px 18px 18px}
.card .body p{margin:0;color:var(--mid);font-size:15px}
.num{font-size:2rem;font-weight:600;line-height:1}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:28px 0 0}
.facts div{border-top:3px solid var(--line);padding-top:12px}
.facts div:nth-child(1){border-color:var(--red)}
.facts div:nth-child(2){border-color:var(--orange)}
.facts div:nth-child(3){border-color:var(--blue)}
.facts small{display:block;color:var(--mid);font-size:14px;margin-top:4px}

.seq{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:24px}
.seq figure{margin:0}
.seq img{background:#fff;border:1px solid var(--line);border-radius:4px;padding:6px;aspect-ratio:4/3;object-fit:contain}
.seq figcaption{font-size:13.5px;color:var(--mid);margin-top:8px}
.seq figcaption b{color:var(--ink)}

.feat{display:grid;grid-template-columns:repeat(2,1fr);gap:22px 40px;margin-top:20px}
.feat h3{display:flex;gap:10px;align-items:baseline}
.feat h3 i{display:inline-block;width:10px;height:10px;border-radius:2px;flex:none;transform:translateY(-1px)}
.feat p{color:var(--mid);font-size:15.5px;margin:0}
.c1{background:var(--red)}.c2{background:var(--orange)}.c3{background:var(--yellow)}.c4{background:var(--green)}.c5{background:var(--blue)}

.scheme{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start;padding:40px 0;border-top:1px solid var(--line)}
.scheme:first-of-type{border-top:none;padding-top:0}
.scheme .pics{display:grid;gap:10px}
.scheme .pics img{border-radius:4px}
.scheme .pair{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.scheme .pair figure{margin:0}
.scheme .pair figcaption{font-size:13px;color:var(--mid);margin-top:4px}
dl.meta{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:15px;margin:14px 0 0}
dl.meta dt{color:var(--mid)}
dl.meta dd{margin:0}

.quiet{font-size:14px;color:var(--mid)}
.list{padding-left:1.2em;margin:0 0 16px}
.list li{margin-bottom:8px}
.contact{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.contact .box{background:var(--tint);border-radius:6px;padding:22px 24px}
.contact .box p{margin:0 0 6px}

footer{border-top:1px solid var(--line);padding:30px 0 40px;font-size:14px;color:var(--mid)}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
footer img{height:26px}

@media (max-width:820px){
  body{font-size:16px}
  h1{font-size:1.8rem}
  .hero .wrap,.grid2,.scheme,.contact{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr 1fr}
  .seq{grid-template-columns:repeat(2,1fr)}
  .feat{grid-template-columns:1fr}
  .menu-btn{display:block}
  .nav ul{display:none;width:100%;flex-direction:column;gap:12px;padding:10px 0 4px}
  .nav.open ul{display:flex}
  .nav{flex-wrap:wrap}
}

.form label{display:block;font-size:14px;color:var(--mid);margin-bottom:14px}
.form input,.form textarea{display:block;width:100%;margin-top:6px;padding:11px 12px;border:1px solid #c9ccd2;border-radius:4px;font:inherit;font-size:16px;color:var(--ink);background:#fff}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--blue)}
.form .req{color:var(--red)}
.form button{font:inherit;cursor:pointer}