/* SEIN LAB landing page, in the demo shop's look (theme/startrees/assets/sein.css): warm paper, ink,
   the table colour behind the screens, Pretendard. No script. */
:root{
  --name:#161513;--ink:#1f1e1b;--ink2:#3a3833;--sub:#4f4c46;--muted:#6c685f;
  --line:#e4e0d8;--line-strong:#d3cec4;--paper:#fbfaf7;--band:#f3f0ea;--table:#e7dfd2;
  --accent:#a84c26;--wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,system-ui,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;font-size:16px;line-height:1.75;letter-spacing:-.01em;word-break:keep-all;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
h1,h2,h3,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
picture{display:block}
:focus-visible{outline:2px solid var(--name);outline-offset:3px}
.wrap{width:min(var(--wrap),calc(100% - 48px));margin:0 auto}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:10;padding:8px 14px;background:var(--ink);color:#fff}
.skip:focus{top:12px}

.top{position:sticky;top:0;z-index:5;background:var(--paper);border-bottom:1px solid var(--line)}
.top-row{height:64px;display:flex;align-items:center;gap:40px}
.logo{font-size:18px;font-weight:800;letter-spacing:.16em;color:var(--name);white-space:nowrap}
.top-nav{display:flex;gap:28px;margin-right:auto;font-size:14.5px;color:var(--ink2)}
.top-nav a:hover{color:var(--name)}
.top-demo{padding:8px 16px;border:1px solid var(--name);font-size:14px;font-weight:600;color:var(--name);white-space:nowrap}
.top-demo:hover{background:var(--name);color:#fff}

.label{margin:0 0 18px;font-size:12.5px;font-weight:600;letter-spacing:.16em;color:var(--sub)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 26px;border:1px solid var(--name);color:var(--name);font-size:15px;font-weight:600;line-height:1.2;transition:background-color .15s,color .15s}
.btn:hover{background:var(--name);color:#fff}
.btn.main{background:var(--name);color:#fff}
.btn.main:hover{background:#000;border-color:#000}
.btn.light{border-color:rgba(255,255,255,.6);color:#fff}
.btn.light:hover{border-color:#fff;background:#fff;color:var(--name)}
.actions{display:flex;flex-wrap:wrap;gap:10px}

.hero{padding:88px 0 56px}
.hero h1{font-size:64px;font-weight:700;line-height:1.16;letter-spacing:-.045em;color:var(--name)}
.hero-row{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-top:36px}
.lead{max-width:34em;font-size:17.5px;line-height:1.8;color:var(--sub)}
.hero-row .actions{flex:0 0 auto}

/* The screens sit across the line where the paper meets the table colour. */
.showcase{background:linear-gradient(var(--paper) 0 34%,var(--table) 34% 100%);padding-bottom:88px}
.showcase-row{position:relative}
.browser{overflow:hidden;border:1px solid rgba(31,30,27,.12);border-radius:10px;background:#fff;box-shadow:0 24px 60px -24px rgba(31,30,27,.28)}
.browser-bar{display:flex;align-items:center;justify-content:center;height:38px;border-bottom:1px solid var(--line);background:#f6f4ef}
.browser-bar span{padding:3px 22px;border-radius:6px;background:#fff;font-size:12.5px;color:var(--muted);letter-spacing:0}
.phone{position:absolute;right:-28px;bottom:-56px;width:212px;overflow:hidden;border:7px solid var(--ink);border-radius:30px;background:var(--ink);box-shadow:0 24px 50px -18px rgba(31,30,27,.45)}
.phone img{border-radius:23px}

.section{padding:112px 0}
.band{background:var(--band)}
.head h2{font-size:40px;font-weight:700;line-height:1.28;letter-spacing:-.04em;color:var(--name)}
.meta{margin-top:12px;font-size:14.5px;color:var(--muted)}

.case{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:64px;margin-top:48px;align-items:start}
.case-lead{font-size:19px;line-height:1.7;color:var(--ink);letter-spacing:-.02em}
.note{margin-top:16px;padding-left:14px;border-left:2px solid var(--line-strong);font-size:14.5px;color:var(--muted)}
.facts{margin-top:32px;border-top:1px solid var(--ink)}
.facts div{display:grid;grid-template-columns:72px minmax(0,1fr);gap:16px;padding:15px 0;border-bottom:1px solid var(--line)}
.facts dt{font-size:14.5px;font-weight:700;color:var(--name)}
.facts dd{font-size:15px;line-height:1.7;color:var(--ink2)}
.case .actions{margin-top:32px}
.case-shots{display:grid;gap:28px}
.case-shots img{border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 18px 40px -26px rgba(31,30,27,.35)}
figcaption{margin-top:10px;font-size:13.5px;color:var(--muted)}

.split{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:64px}
.index{border-top:1px solid var(--ink)}
.index li{display:grid;grid-template-columns:180px minmax(0,1fr);gap:24px;padding:24px 0;border-bottom:1px solid var(--line-strong)}
.index h3,.cost-list h3,.steps h3{font-size:17px;font-weight:700;letter-spacing:-.02em;color:var(--name)}
.index p,.cost-list p,.steps p{font-size:15px;line-height:1.75;color:var(--ink2)}

.cost{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:64px;margin-top:48px}
.figure{margin-bottom:18px;font-size:56px;font-weight:700;line-height:1.1;letter-spacing:-.04em;color:var(--accent)}
.cost-figure>p:last-child{font-size:16.5px;line-height:1.85;color:var(--ink2)}
.cost-list{border-top:1px solid var(--ink)}
.cost-list li{padding:22px 0;border-bottom:1px solid var(--line)}
.cost-list p{margin-top:6px}

.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:20px;margin-top:48px}
.steps li{padding-top:18px;border-top:1px solid var(--ink)}
.steps p{margin-top:8px;font-size:14.5px}
.stack{margin-top:64px;padding-top:24px;border-top:1px solid var(--line-strong);font-size:15px;line-height:1.9;color:var(--ink2)}
.stack span{display:inline-block;margin-right:16px;font-weight:700;color:var(--name)}

.contact{background:var(--ink);color:#e9e4db;padding:104px 0}
.contact-row{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:64px;align-items:end}
.contact .label{color:#b8b1a5}
.contact h2{font-size:38px;font-weight:700;line-height:1.3;letter-spacing:-.04em;color:#fff}
.contact p{font-size:16.5px;line-height:1.85;color:#d8d2c7}
.contact .actions{margin-top:28px}

.foot{background:var(--ink);border-top:1px solid rgba(233,228,219,.14);color:#b8b1a5;font-size:13.5px}
.foot-row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:24px 0 40px}
.foot strong{letter-spacing:.16em;color:#e9e4db}

@media (max-width:1100px){
  .phone{right:-8px;width:180px}
  .hero h1{font-size:54px}
}
@media (max-width:900px){
  /* The bar scrolls away with the page; the section links sit in a row under it that scrolls sideways. */
  html{scroll-padding-top:12px}
  .top{position:static}
  .top-row{height:auto;flex-wrap:wrap;justify-content:space-between;gap:0 16px;padding-top:14px}
  .top-nav{order:3;width:calc(100% + 48px);margin:12px -24px 0;padding:0 24px 12px;gap:24px;overflow-x:auto;scrollbar-width:none;white-space:nowrap}
  .top-nav::-webkit-scrollbar{display:none}
  .hero{padding:64px 0 44px}
  .hero h1{font-size:44px}
  .hero-row{flex-direction:column;align-items:flex-start;gap:28px}
  .showcase{padding-bottom:64px}
  .phone{width:150px;bottom:-40px;border-width:5px;border-radius:24px}
  .phone img{border-radius:19px}
  .section{padding:84px 0}
  .head h2{font-size:32px}
  .case,.split,.cost,.contact-row{grid-template-columns:minmax(0,1fr);gap:40px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}
  .contact{padding:80px 0}
  .contact h2{font-size:30px}
}
@media (max-width:600px){
  body{font-size:15.5px}
  .wrap{width:calc(100% - 36px)}
  .top-nav{width:calc(100% + 36px);margin-left:-18px;margin-right:-18px;padding-left:18px;padding-right:18px}
  .logo{font-size:16px}
  .top-demo{padding:7px 12px;font-size:13.5px}
  .hero{padding:40px 0 32px}
  .hero h1{font-size:34px}
  .lead{font-size:16px}
  .btn{min-height:48px;padding:0 20px}
  /* Phones see phone screens (the <picture> sources in index.html), in a phone's frame. */
  .browser,.case-shots img{border:6px solid var(--ink);background:var(--ink)}
  .browser{width:min(270px,78%);margin:0 auto;border-radius:34px;box-shadow:0 24px 50px -20px rgba(31,30,27,.45)}
  .browser img{border-radius:28px}
  .browser-bar,.phone{display:none}
  .showcase{background:linear-gradient(var(--paper) 0 24%,var(--table) 24% 100%);padding-bottom:56px}
  .case-shots{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .case-shots img{border-width:5px;border-radius:24px}
  .case-shots figcaption{text-align:center}
  .section{padding:68px 0}
  .head h2{font-size:27px}
  .case-lead{font-size:17px}
  .facts div{grid-template-columns:56px minmax(0,1fr);gap:12px}
  .index li{grid-template-columns:minmax(0,1fr);gap:6px;padding:20px 0}
  .figure{font-size:44px}
  .steps{grid-template-columns:minmax(0,1fr)}
  .contact{padding:68px 0}
  .contact h2{font-size:25px}
}