/* Undertow product site — navy, turquoise, off-white. No external fonts, no JS. */

:root{
  --paper:#F7F6F2;
  --ink:#0B1F3A;
  --accent:#3FD0BE;
  --muted:rgba(11,31,58,.66);
  --faint:rgba(11,31,58,.10);
  --line:rgba(11,31,58,.16);
  --accent-soft:rgba(63,208,190,.10);
  --system:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  background:var(--paper);
}

body{
  margin:0;
  min-height:100svh;
  display:flex;
  flex-direction:column;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--system);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

img,svg{display:block;max-width:100%}
h1,h2,h3,p,ul,ol,dl,dd,figure{margin:0}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:var(--ink)}

:focus-visible{
  outline:2px solid var(--ink);
  outline-offset:4px;
  border-radius:2px;
}

.skip{
  position:absolute;
  left:16px;
  top:-120px;
  z-index:20;
  min-height:44px;
  display:inline-flex;
  align-items:center;
  padding:10px 16px;
  background:var(--ink);
  color:var(--paper);
  border-radius:10px;
}
.skip:focus{top:12px}

/* ---------- top bar */
.site-head{
  width:100%;
  max-width:1060px;
  margin:0 auto;
  padding:14px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-height:44px;
  font-size:17px;
  font-weight:600;
  letter-spacing:-.025em;
}
.brand .mark{width:27px;height:27px;flex:none}
.brand .mark circle{fill:none;stroke:var(--ink);stroke-width:1.6}
.brand .mark path{fill:none;stroke:var(--accent);stroke-width:2.2;stroke-linecap:round}
.brand .mark .dot{fill:var(--ink);stroke:none}

.top-nav{
  display:flex;
  align-items:center;
  gap:4px;
  flex-wrap:wrap;
  justify-content:flex-end;
}
.top-nav a{
  min-height:44px;
  display:inline-flex;
  align-items:center;
  padding:0 10px;
  font-size:13.5px;
  font-weight:500;
  color:var(--muted);
  border-radius:8px;
}
.top-nav a:hover{color:var(--ink)}
.top-nav a[aria-current="page"]{color:var(--ink)}
.top-nav .lang{
  margin-left:4px;
  padding:0 13px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
}
.top-nav .lang:hover{border-color:var(--ink)}

/* ---------- home */
.home{
  flex:1;
  width:100%;
  max-width:1000px;
  margin:0 auto;
  padding:clamp(30px,5vh,58px) 24px 0;
  text-align:center;
}

.status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:32px;
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.status::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--accent);
}

.home h1{
  margin-top:22px;
  font-size:clamp(58px,11.5vw,108px);
  font-weight:600;
  line-height:.94;
  letter-spacing:-.062em;
}

.tagline{
  max-width:44ch;
  margin:18px auto 0;
  font-size:clamp(19px,2.5vw,26px);
  line-height:1.32;
  letter-spacing:-.025em;
  color:var(--ink);
}

.screens{
  display:flex;
  align-items:flex-start;
  justify-content:center;
  gap:clamp(12px,2.4vw,24px);
  margin-top:clamp(32px,5vh,52px);
}

.phone{
  width:clamp(148px,17vw,216px);
  padding:5px;
  border-radius:32px;
  background:var(--ink);
  box-shadow:0 22px 54px rgba(11,31,58,.18);
}
.phone:nth-child(2){transform:translateY(clamp(14px,2.6vw,30px))}
.phone img{
  width:100%;
  height:auto;
  border-radius:27px;
}
.screens-note{
  margin-top:38px;
  font-size:9.5px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}

.store{
  margin:clamp(28px,4vh,44px) auto clamp(34px,5vh,54px);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:9px;
}
.store-slot{
  display:inline-flex;
  align-items:center;
  gap:11px;
  min-height:54px;
  padding:8px 18px;
  border:1px solid var(--ink);
  border-radius:13px;
  text-align:left;
}
.store-slot svg{width:24px;height:24px;flex:none;fill:var(--ink)}
.store-slot .store-copy{display:block;line-height:1.05}
.store-slot small{
  display:block;
  font-size:8.5px;
  font-weight:500;
  letter-spacing:.10em;
  text-transform:uppercase;
  color:var(--muted);
}
.store-slot strong{
  display:block;
  margin-top:2px;
  font-size:16px;
  font-weight:600;
  letter-spacing:-.02em;
}
.store-slot em{
  font-style:normal;
  margin-left:3px;
  padding:3px 7px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:8.5px;
  font-weight:600;
  letter-spacing:.10em;
  text-transform:uppercase;
  color:var(--muted);
}
.store-note{
  font-size:12px;
  color:var(--muted);
}

/* ---------- footer */
.foot{
  margin-top:auto;
  border-top:1px solid var(--line);
}
.foot-inner{
  max-width:1060px;
  margin:0 auto;
  padding:18px 24px 26px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:6px 24px;
}
.foot-brand{
  font-size:13px;
  font-weight:600;
  letter-spacing:-.01em;
}
.foot-brand span{
  font-weight:400;
  color:var(--muted);
}
.foot-links{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
}
.foot-links a,
.foot-fine a{
  min-height:44px;
  display:inline-flex;
  align-items:center;
  padding:0 7px;
  font-size:12.5px;
  color:var(--muted);
  text-decoration:underline;
  text-decoration-color:var(--faint);
  text-decoration-thickness:1px;
  text-underline-offset:4px;
}
.foot-links a:hover,
.foot-fine a:hover{
  color:var(--ink);
  text-decoration-color:var(--accent);
}
.foot-fine{
  width:100%;
  padding-top:7px;
  border-top:1px solid var(--faint);
  font-size:11.5px;
  color:var(--muted);
}
.foot-fine a{padding:0 3px;text-decoration-color:var(--line)}

/* ---------- documents */
.doc{
  flex:1;
  width:100%;
  max-width:760px;
  margin:0 auto;
  padding:clamp(34px,6vw,62px) 24px 88px;
}

.kicker{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}
.kicker::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--accent);
  flex:none;
}

.doc h1{
  margin-top:16px;
  font-size:clamp(42px,7.4vw,64px);
  font-weight:600;
  line-height:.98;
  letter-spacing:-.052em;
}

.lede{
  max-width:54ch;
  margin-top:18px;
  font-size:clamp(17px,2.1vw,20px);
  line-height:1.5;
  letter-spacing:-.012em;
  color:var(--muted);
}

.meta{
  margin-top:22px;
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
  font-size:11px;
  font-weight:600;
  letter-spacing:.11em;
  text-transform:uppercase;
  color:var(--muted);
}

.summary{
  margin-top:30px;
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  background:var(--accent-soft);
}
.summary div{
  display:grid;
  grid-template-columns:118px 1fr;
  gap:14px;
  padding:15px 18px;
}
.summary div + div{border-top:1px solid rgba(11,31,58,.12)}
.summary dt,
.summary .sum-label{
  font-size:10px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
  padding-top:3px;
}
.summary p{font-size:14.5px;line-height:1.55}

.doc section{margin-top:0}
.doc h2{
  margin:46px 0 14px;
  padding-top:24px;
  border-top:1px solid var(--line);
  font-size:21px;
  font-weight:600;
  line-height:1.25;
  letter-spacing:-.028em;
}
.doc h3{
  margin:24px 0 7px;
  font-size:15px;
  font-weight:600;
  letter-spacing:-.01em;
}
.doc p{
  margin:11px 0 0;
  font-size:16px;
  line-height:1.7;
}
.doc p:first-of-type{margin-top:0}
.doc ul,
.doc ol{
  margin:12px 0 0;
  padding-left:21px;
}
.doc li{
  margin:7px 0;
  font-size:16px;
  line-height:1.65;
}
.doc li::marker{color:var(--accent)}
.doc a{
  text-decoration:underline;
  text-decoration-color:var(--accent);
  text-decoration-thickness:1.5px;
  text-underline-offset:3px;
  overflow-wrap:anywhere;
}
.doc a:hover{text-decoration-thickness:2px}
.doc strong{font-weight:600}
.doc code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.86em;
  padding:1px 4px;
  border-radius:4px;
  background:rgba(11,31,58,.07);
  overflow-wrap:anywhere;
}

.data-list{
  margin-top:16px;
  border-top:1px solid var(--line);
}
.data-list div{
  padding:14px 0 15px;
  border-bottom:1px solid var(--line);
}
.data-list dt{
  font-size:15px;
  font-weight:600;
  letter-spacing:-.01em;
}
.data-list dd{
  margin-top:4px;
  font-size:14.5px;
  line-height:1.6;
  color:var(--muted);
}
.tag{
  display:inline-block;
  margin-left:5px;
  padding:2px 7px;
  border-radius:999px;
  background:var(--accent-soft);
  font-size:9px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
  vertical-align:2px;
}

.note{
  margin-top:22px;
  padding:15px 17px;
  border-left:3px solid var(--accent);
  border-radius:0 10px 10px 0;
  background:var(--accent-soft);
  font-size:14px;
  line-height:1.6;
}
.note p{margin:0;font-size:14px;line-height:1.6}
.note .note-label{
  display:block;
  margin-bottom:4px;
  font-size:9.5px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}

.contact{
  margin-top:18px;
  padding:20px;
  border:1px solid var(--line);
  border-radius:14px;
}
.contact .mail{
  font-size:clamp(17px,2.6vw,21px);
  font-weight:600;
  letter-spacing:-.02em;
  text-decoration-color:var(--accent);
}
.contact p{
  margin-top:7px;
  font-size:13.5px;
  color:var(--muted);
}

.steps{
  margin:16px 0 0;
  padding:0;
  list-style:none;
  counter-reset:step;
}
.steps li{
  counter-increment:step;
  display:grid;
  grid-template-columns:28px 1fr;
  gap:12px;
  padding:13px 0;
  border-bottom:1px solid var(--line);
  margin:0;
}
.steps li::before{
  content:counter(step);
  width:26px;
  height:26px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--ink);
  color:var(--paper);
  font-size:11px;
  font-weight:600;
  margin-top:2px;
}
.steps li b{font-weight:600}

.faq{
  margin-top:16px;
  border-top:1px solid var(--line);
}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 2px;
  cursor:pointer;
  font-size:15.5px;
  font-weight:600;
  letter-spacing:-.012em;
  list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";
  flex:none;
  width:22px;
  text-align:center;
  font-size:19px;
  font-weight:400;
  color:var(--muted);
}
.faq details[open] summary::after{content:"−"}
.faq details p{
  margin:0;
  padding:0 30px 17px 2px;
  font-size:14.5px;
  line-height:1.65;
  color:var(--muted);
}

.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  margin-top:18px;
}
.split .contact{margin-top:0}

@media (max-width:640px){
  .site-head{padding:10px 18px;gap:8px}
  .brand{font-size:16px;gap:7px}
  .brand .mark{width:24px;height:24px}
  .top-nav a{padding:0 7px;font-size:12.5px}
  .top-nav .lang{padding:0 9px;margin-left:0}
  .home{padding:24px 18px 0}
  .home h1{margin-top:18px}
  .tagline{margin-top:14px}
  .screens{gap:10px}
  .phone{width:min(42vw,168px);border-radius:26px;padding:4px}
  .phone img{border-radius:22px}
  .phone:nth-child(2){transform:translateY(16px)}
  .screens-note{margin-top:32px;font-size:8.5px;letter-spacing:.08em}
  .store{margin-top:32px;margin-bottom:36px}
  .foot-inner{padding:16px 18px 22px;display:block}
  .foot-links{margin-top:2px}
  .foot-links a{padding:0 10px 0 0;font-size:12px}
  .foot-fine{padding-top:10px;margin-top:2px;line-height:1.5}
  .doc{padding:30px 18px 68px}
  .summary div{grid-template-columns:1fr;gap:3px;padding:14px 15px}
  .summary .sum-label{padding-top:0}
  .doc h2{margin-top:38px}
  .doc p,.doc li{font-size:15.5px}
  .split{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}