:root{
  --ink:#14171c;
  --ink-soft:#4a4f58;
  --paper:#f7f5f0;
  --paper-raised:#fffefb;
  --navy:#16233d;
  --blue:#0b5fff;
  --blue-dark:#0a46c2;
  --line:#ddd8cd;
  --mono-bg:#eef0f3;
  --mono-text:#3a3f4b;
  --max:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:Georgia, 'Times New Roman', Times, serif;
  font-size:18px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.wordmark,button,.btn,nav a,.step-num,.stamp{
  font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
}
code, .hash, .mono{
  font-family:ui-monospace, 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;
}

a{color:var(--blue)}
img{max-width:100%;height:auto;display:block}

.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}

/* ---- header ---- */
header{
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
header .wrap{display:flex;align-items:center;justify-content:space-between}
.wordmark{
  font-weight:700;
  font-size:21px;
  letter-spacing:-0.01em;
  color:var(--navy);
  text-decoration:none;
}
nav{display:flex;gap:28px}
nav a{
  color:var(--ink-soft);
  text-decoration:none;
  font-size:15px;
  font-weight:500;
}
nav a:hover{color:var(--blue)}
.lang-switch{display:flex;gap:6px;font-size:14px}
.lang-switch a{
  color:var(--ink-soft);
  text-decoration:none;
  padding:2px 6px;
  border-radius:4px;
}
.lang-switch a.active{color:var(--paper);background:var(--navy)}

/* ---- hero ---- */
.hero{padding:72px 0 56px}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero h1{
  font-size:clamp(38px,5vw,54px);
  line-height:1.06;
  margin:0 0 22px;
  color:var(--navy);
  font-weight:700;
  letter-spacing:-0.015em;
}
.hero p.lede{
  font-size:19px;
  color:var(--ink-soft);
  max-width:46ch;
  margin:0 0 30px;
}
.cta-row{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.btn{
  display:inline-block;
  background:var(--navy);
  color:#fff;
  text-decoration:none;
  padding:14px 26px;
  border-radius:8px;
  font-weight:600;
  font-size:15px;
  letter-spacing:0.01em;
  border:1px solid var(--navy);
}
.btn:hover{background:var(--blue);border-color:var(--blue)}
.price-note{font-size:14px;color:var(--ink-soft)}
.price-note .mono{color:var(--ink)}

.hero-art{position:relative}
.hero-art img{
  border-radius:10px;
  box-shadow:0 24px 48px -20px rgba(20,23,28,.35);
  border:1px solid var(--line);
}
.stamp{
  position:absolute;
  bottom:-22px;
  left:-22px;
  width:104px;
  height:104px;
  border-radius:50%;
  background:var(--paper-raised);
  border:1.5px solid var(--navy);
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  transform:rotate(-8deg);
  box-shadow:0 10px 22px -10px rgba(20,23,28,.3);
}
.stamp .stamp-inner{
  font-size:12.5px;
  font-weight:700;
  letter-spacing:0.02em;
  line-height:1.3;
  color:var(--navy);
}
.stamp .stamp-inner .hash{display:block;font-size:10px;font-weight:500;color:var(--blue);margin-top:4px}

/* ---- section shell ---- */
section{padding:64px 0}
section.alt{background:var(--paper-raised);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
h2{
  font-size:30px;
  color:var(--navy);
  font-weight:600;
  letter-spacing:-0.01em;
  margin:0 0 10px;
}
.section-lede{color:var(--ink-soft);max-width:60ch;margin:0 0 40px;font-size:17px}

/* ---- steps (genuinely sequential, numbering earned) ---- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  grid-template-rows:auto auto auto 1fr;
  grid-auto-flow:column;
  column-gap:36px;
}
.step{display:contents}
.step-num{
  font-size:13px;
  font-weight:700;
  color:var(--blue);
  margin-bottom:8px;
  letter-spacing:0.02em;
  border-top:2px solid var(--navy);
  padding-top:16px;
}
.step h3{
  font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  font-size:20px;
  margin:0 0 8px;
  color:var(--navy);
}
.step p{color:var(--ink-soft);font-size:15.5px;margin:0 0 16px}
.step img{border-radius:8px;border:1px solid var(--line)}

/* ---- ledger / differentiation ---- */
.ledger{
  border:1px solid var(--line);
  border-radius:10px;
  overflow:hidden;
  background:var(--paper-raised);
}
.ledger-row{
  display:grid;
  grid-template-columns:1fr 1fr;
}
.ledger-row + .ledger-row{border-top:1px solid var(--line)}
.ledger-cell{padding:20px 26px;font-size:16px}
.ledger-cell.them{color:var(--ink-soft)}
.ledger-cell.us{
  color:var(--navy);
  font-weight:500;
  background:linear-gradient(to right, rgba(11,95,255,.05), transparent);
  border-left:3px solid var(--blue);
}
.ledger-head{display:grid;grid-template-columns:1fr 1fr;background:var(--navy)}
.ledger-head div{padding:12px 26px;color:#fff;font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;font-size:13px;font-weight:600;letter-spacing:0.02em}

/* ---- gallery ---- */
.gallery{
  display:flex;
  gap:22px;
  overflow-x:auto;
  padding:10px 4px 20px;
  scroll-snap-type:x mandatory;
}
.gallery figure{
  margin:0;
  flex:0 0 auto;
  width:260px;
  scroll-snap-align:start;
}
.gallery img{border-radius:8px;border:1px solid var(--line)}
.gallery figcaption{font-size:13px;color:var(--ink-soft);margin-top:10px}

/* ---- pricing ---- */
.price-card{
  border:1px solid var(--line);
  background:var(--paper-raised);
  border-radius:12px;
  padding:40px;
  max-width:480px;
}
.price-big{font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;font-size:44px;font-weight:700;color:var(--navy)}
.price-sub{color:var(--ink-soft);font-size:15px;margin:6px 0 24px}
.price-list{list-style:none;padding:0;margin:0 0 28px;display:grid;gap:10px}
.price-list li{font-size:15.5px;color:var(--ink-soft);padding-left:22px;position:relative}
.price-list li::before{content:"—";position:absolute;left:0;color:var(--blue)}

/* ---- footer ---- */
footer{border-top:1px solid var(--line);padding:40px 0;color:var(--ink-soft);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
footer a{color:var(--ink-soft);text-decoration:underline}
footer nav{gap:20px}

/* ---- simple content pages (privacy / support / guide) ---- */
.doc{padding:56px 0 80px}
.doc .wrap{max-width:720px}
.doc h1{font-size:36px;color:var(--navy);margin:0 0 6px}
.doc .updated{color:var(--ink-soft);font-size:14px;margin:0 0 40px}
.doc h2{font-size:22px;margin-top:44px}
.doc p{margin:0 0 16px}
.doc ul{padding-left:20px}
.doc li{margin-bottom:10px}
.faq-item{border-top:1px solid var(--line);padding:26px 0}
.faq-item h3{font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;font-size:18px;color:var(--navy);margin:0 0 10px}
.guide-step{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:30px 0;border-top:1px solid var(--line);align-items:start}
.guide-step .gs-num{font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;font-weight:700;font-size:34px;color:var(--line)}
.guide-step h3{font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;font-size:19px;color:var(--navy);margin:0 0 8px}
.guide-step img{margin-top:14px;border-radius:8px;border:1px solid var(--line);max-width:360px}
.warn{
  background:#fff4e5;
  border:1px solid #eccb8b;
  border-radius:8px;
  padding:16px 18px;
  font-size:15px;
  color:#5a4419;
  margin-top:14px;
}

@media (max-width:820px){
  .wrap{padding:0 20px}
  header{padding:18px 0}
  header .wrap{flex-wrap:wrap;gap:14px 18px}
  header nav{
    order:3;
    width:100%;
    justify-content:space-between;
    gap:12px;
    border-top:1px solid var(--line);
    padding-top:12px;
  }
  header nav a{font-size:14px;white-space:nowrap}
  .lang-switch{margin-left:auto}
  .hero{padding:44px 0 42px}
  .hero .wrap{grid-template-columns:1fr;gap:34px}
  .hero-art{order:-1}
  .hero h1{font-size:clamp(36px,10vw,48px)}
  section{padding:48px 0}
  .steps{grid-template-columns:1fr;grid-template-rows:none;grid-auto-flow:row;row-gap:32px}
  .step{display:block}
  .ledger-row,.ledger-head{grid-template-columns:1fr}
  .ledger-head div:first-child{border-bottom:1px solid rgba(255,255,255,.18)}
  .ledger-cell.us{border-left:0;border-top:3px solid var(--blue)}
  .guide-step{grid-template-columns:1fr}
  .stamp{width:84px;height:84px;left:-10px;bottom:-16px}
  .price-card{padding:30px 24px}
  footer .wrap{flex-direction:column}
  footer nav{flex-wrap:wrap}
}

@media (max-width:520px){
  body{font-size:17px}
  .wrap{padding:0 16px}
  header .wrap{gap:12px}
  .wordmark{font-size:20px}
  header nav{justify-content:flex-start;gap:16px;overflow-x:auto;padding-bottom:2px}
  header nav a{font-size:13px}
  .lang-switch{font-size:13px}
  .hero{padding-top:34px}
  .hero h1{font-size:36px}
  h2{font-size:27px}
  .gallery figure{width:min(82vw,320px)}
  .price-big{font-size:38px}
  .doc{padding:42px 0 64px}
  .doc h1{font-size:32px}
}

.btn-disabled{cursor:default;opacity:.72;user-select:none}
.btn-disabled:hover{background:var(--ink);border-color:var(--ink)}


/* ---- screenshot zoom / lightbox ---- */
.zoomable-image{
  cursor:zoom-in;
  transition:transform .16s ease, box-shadow .16s ease;
}
.zoomable-image:hover{
  transform:translateY(-1px);
  box-shadow:0 14px 30px -18px rgba(20,23,28,.45);
}
.zoomable-image:focus-visible{
  outline:3px solid var(--blue);
  outline-offset:3px;
}
.zoom-hint{
  margin:-24px 0 28px;
  color:var(--ink-soft);
  font-size:14px;
  font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
}
.guide-zoom-hint{margin:-24px 0 28px}
.image-lightbox{
  border:0;
  padding:0;
  margin:0;
  width:100vw;
  height:100vh;
  max-width:100vw;
  max-height:100vh;
  background:transparent;
  overflow:hidden;
}
.image-lightbox[open]{
  display:grid;
  place-items:center;
}
.image-lightbox::backdrop{
  background:rgba(8,12,22,.88);
  backdrop-filter:blur(3px);
}
.image-lightbox-inner{
  position:relative;
  max-width:96vw;
  max-height:96vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
}
.image-lightbox-image{
  width:auto;
  height:auto;
  max-width:min(1280px,94vw);
  max-height:88vh;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.28);
  box-shadow:0 28px 70px rgba(0,0,0,.48);
  background:#fff;
}
.image-lightbox-caption{
  margin:0;
  color:#fff;
  font-size:14px;
  line-height:1.35;
  text-align:center;
  font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
}
.image-lightbox-close{
  position:absolute;
  top:-18px;
  right:-18px;
  z-index:2;
  width:42px;
  height:42px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.35);
  background:#fff;
  color:var(--navy);
  font-family:-apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  font-size:28px;
  line-height:36px;
  cursor:pointer;
  box-shadow:0 10px 28px rgba(0,0,0,.35);
}
.image-lightbox-close:hover{background:#f3f5f8}
.image-lightbox-close:focus-visible{outline:3px solid #fff;outline-offset:3px}

@media (max-width:520px){
  .image-lightbox-image{max-width:96vw;max-height:82vh;border-radius:6px}
  .image-lightbox-close{top:-14px;right:-4px;width:38px;height:38px;font-size:25px;line-height:32px}
}