*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --white:#f7f7f5;
  --black:#111;
  --blue:#175DDC;
  --yellow:#d4f000;
  --line:#e2e2de;
  --muted:#5c5c5c;
  --display:"Syne","Noto Sans SC",system-ui,sans-serif;
  --body:"DM Sans","Noto Sans SC",system-ui,sans-serif;
  --mono:"DM Sans",monospace;
  --max:1120px;
  --pad:clamp(20px,4vw,40px);
  --section:clamp(64px,8vw,96px)
}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);background:var(--white);color:var(--black);
  line-height:1.65;overflow-x:hidden
}
a{color:inherit}
img{display:block;max-width:100%}

/* ── Header ── */
.site-header{
  position:sticky;top:0;z-index:200;
  background:var(--black);color:#fff;
  border-bottom:4px solid var(--yellow)
}
.header-inner{
  max-width:var(--max);margin:0 auto;padding:0 var(--pad);
  height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px
}
.brand{
  display:flex;align-items:center;gap:10px;
  font-family:var(--display);font-weight:800;font-size:.95rem;
  text-decoration:none;color:#fff;flex-shrink:0
}
.brand img{width:28px;height:28px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  padding:8px 16px;text-decoration:none;color:rgba(255,255,255,.7);
  font-size:.82rem;font-weight:700;border-radius:4px;transition:.2s
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav a.on{color:var(--black);background:var(--yellow)}
.nav-cta{
  padding:10px 20px;background:var(--blue);color:#fff;
  font-size:.82rem;font-weight:700;text-decoration:none;border-radius:4px;
  transition:.2s;white-space:nowrap
}
.nav-cta:hover{background:#1252a3}

/* ── Page shell ── */
.page{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.crumb{
  padding:20px 0 0;font-size:.72rem;color:var(--muted);
  font-family:var(--mono);letter-spacing:.04em
}
.crumb a{color:var(--blue);text-decoration:none}

/* ── Section rhythm ── */
.section{padding:var(--section) 0}
.section-head{margin-bottom:36px}
.section-num{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--blue);margin-bottom:8px
}
.section-head h2{
  font-family:var(--display);font-size:clamp(1.6rem,3vw,2.2rem);
  font-weight:800;line-height:1.1;letter-spacing:-.02em
}
.section-head p{margin-top:10px;color:var(--muted);font-size:.92rem;max-width:520px}

/* ── Hero (poster) ── */
.poster-hero{
  padding:clamp(40px,6vw,72px) 0 var(--section);
  display:grid;grid-template-columns:1.05fr .95fr;gap:20px;align-items:stretch
}
.hero-copy{
  background:var(--yellow);border:3px solid var(--black);
  padding:clamp(32px,5vw,52px);display:flex;flex-direction:column;justify-content:flex-end;
  position:relative;overflow:hidden
}
.hero-copy::before{
  content:'';position:absolute;top:-30%;right:-15%;width:55%;height:110%;
  background:var(--blue);border-radius:50%;opacity:.12
}
.hero-eyebrow{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--black);opacity:.7;
  margin-bottom:16px;position:relative;z-index:1
}
.hero-copy h1{
  font-family:var(--display);font-size:clamp(2.2rem,5vw,3.6rem);
  font-weight:800;line-height:1.02;letter-spacing:-.03em;
  position:relative;z-index:1
}
.hero-copy p{
  margin-top:18px;font-size:.95rem;max-width:400px;
  position:relative;z-index:1;color:rgba(17,17,17,.85)
}
.hero-actions{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
.hero-visual{
  border:3px solid var(--black);background:var(--blue);
  overflow:hidden;cursor:zoom-in;min-height:320px
}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-strip{
  grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);
  border:3px solid var(--black);background:#fff
}
.hero-stat{
  padding:24px 28px;border-right:3px solid var(--black)
}
.hero-stat:last-child{border-right:none}
.hero-stat b{
  display:block;font-family:var(--display);font-size:1.6rem;
  font-weight:800;color:var(--blue);line-height:1
}
.hero-stat span{font-size:.78rem;color:var(--muted);margin-top:6px;display:block}

/* ── Sub page hero ── */
.sub-hero{
  padding:clamp(36px,5vw,56px) 0 40px;
  border-bottom:3px solid var(--black);margin-bottom:var(--section)
}
.sub-hero h1{
  font-family:var(--display);font-size:clamp(2rem,4vw,3rem);
  font-weight:800;letter-spacing:-.02em;margin-bottom:12px
}
.sub-hero p{color:var(--muted);font-size:.95rem;max-width:560px}
.sub-hero .hero-actions{margin-top:24px}

/* ── Buttons ── */
.cta{
  display:inline-flex;align-items:center;padding:13px 26px;
  font-weight:700;font-size:.88rem;text-decoration:none;
  border:3px solid var(--black);transition:.2s
}
.cta-dark{background:var(--black);color:var(--yellow)}
.cta-dark:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.cta-line{background:transparent;color:var(--black)}
.cta-line:hover{background:var(--black);color:#fff}

/* ── Compare ── */
.compare-bar{
  display:grid;grid-template-columns:1fr 1fr;
  border:3px solid var(--black);overflow:hidden
}
.compare-side{padding:32px 28px}
.compare-side.old{background:#ececea}
.compare-side.new{background:var(--yellow)}
.compare-side h3{
  font-family:var(--display);font-size:1.05rem;font-weight:800;margin-bottom:18px
}
.compare-side li{
  font-size:.86rem;margin-bottom:10px;list-style:none;
  padding-left:18px;position:relative;line-height:1.5
}
.compare-side li::before{
  content:'';position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%
}
.compare-side.old li::before{background:#bbb}
.compare-side.new li::before{background:var(--blue)}

/* ── Feature grid (uniform) ── */
.feat-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:16px
}
.feat-card{
  padding:28px 24px;border:3px solid var(--black);background:#fff;
  transition:transform .2s,box-shadow .2s
}
.feat-card:hover{transform:translateY(-4px);box-shadow:6px 6px 0 var(--black)}
.feat-card .idx{
  font-family:var(--display);font-size:.72rem;font-weight:800;
  color:var(--blue);margin-bottom:12px
}
.feat-card h3{
  font-family:var(--display);font-size:1rem;font-weight:800;margin-bottom:8px
}
.feat-card p{font-size:.84rem;color:var(--muted);line-height:1.6}
.feat-card.accent{background:var(--blue);color:#fff}
.feat-card.accent p{color:rgba(255,255,255,.8)}
.feat-card.accent .idx{color:var(--yellow)}

/* ── Split / steps ── */
.split-wrap{
  display:grid;grid-template-columns:220px 1fr;gap:48px;align-items:start
}
.step-rail{position:sticky;top:88px}
.step-rail .step{
  display:flex;align-items:center;gap:12px;padding:12px 0 12px 16px;
  font-family:var(--display);font-weight:700;font-size:.82rem;
  color:var(--muted);border-left:3px solid transparent;
  transition:.25s;text-decoration:none
}
.step-rail .step.active{color:var(--black);border-left-color:var(--blue)}
.step-rail .step .n{
  width:26px;height:26px;border-radius:50%;background:var(--black);
  color:var(--yellow);display:flex;align-items:center;justify-content:center;
  font-size:.72rem;flex-shrink:0
}
.step-rail .step.active .n{background:var(--blue);color:#fff}
.step-content h2{
  font-family:var(--display);font-size:1.65rem;font-weight:800;
  margin-bottom:12px;letter-spacing:-.02em
}
.step-content p{color:var(--muted);font-size:.92rem;line-height:1.75;margin-bottom:14px}
.step-content a{color:var(--blue)}
.step-content img{
  width:100%;border:3px solid var(--black);margin:20px 0;cursor:zoom-in
}
.step-block{
  margin-bottom:56px;padding-bottom:56px;border-bottom:2px solid var(--line)
}
.step-block:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}

/* ── Download grid ── */
.dl-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:var(--section)
}
.dl-tile{
  text-align:center;padding:28px 14px;border:3px solid var(--black);
  background:#fff;text-decoration:none;color:var(--black);transition:.2s
}
.dl-tile:hover{background:var(--yellow);transform:translateY(-3px)}
.dl-tile .icon{
  font-family:var(--display);font-size:1.2rem;font-weight:800;
  color:var(--blue);margin-bottom:10px
}
.dl-tile b{display:block;font-size:.88rem;margin-bottom:4px}
.dl-tile span{font-size:.74rem;color:var(--muted)}

/* ── FAQ ── */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.faq-box{
  padding:24px;border:3px solid var(--black);background:#fff
}
.faq-box h4{
  font-family:var(--display);font-weight:800;font-size:.9rem;margin-bottom:8px
}
.faq-box p{font-size:.84rem;color:var(--muted);line-height:1.65}

/* ── Footer ── */
.site-foot{
  margin-top:var(--section);padding:32px 0 48px;
  border-top:3px solid var(--black);
  font-size:.78rem;color:var(--muted);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px
}
.site-foot a{color:var(--blue);font-weight:700;text-decoration:none}
.friend-links{width:100%;margin-top:14px;font-size:.78rem;color:var(--muted);flex-basis:100%}
.friend-links a{font-weight:700}

/* ── Modal ── */
.modal{
  position:fixed;inset:0;z-index:9999;background:rgba(17,17,17,.88);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:.3s;padding:24px
}
.modal.open{opacity:1;visibility:visible}
.modal img{max-width:90vw;max-height:85vh;border:3px solid var(--yellow)}
.modal-close{
  position:absolute;top:20px;right:24px;background:var(--yellow);
  border:3px solid var(--black);width:42px;height:42px;border-radius:50%;
  font-size:18px;font-weight:800;cursor:pointer
}

/* ── Mobile nav (FAB fallback) ── */
.fab-nav{display:none}

@media(max-width:900px){
  .main-nav,.nav-cta{display:none}
  .poster-hero{grid-template-columns:1fr}
  .hero-strip{grid-template-columns:1fr}
  .hero-stat{border-right:none;border-bottom:3px solid var(--black)}
  .hero-stat:last-child{border-bottom:none}
  .feat-grid,.faq-grid,.compare-bar,.dl-grid{grid-template-columns:1fr}
  .split-wrap{grid-template-columns:1fr}
  .step-rail{
    position:static;display:flex;overflow-x:auto;gap:4px;
    padding-bottom:12px;border-bottom:2px solid var(--line)
  }
  .step-rail .step{
    border-left:none;border-bottom:3px solid transparent;padding-left:0;white-space:nowrap
  }
  .step-rail .step.active{border-bottom-color:var(--blue)}
  .fab-nav{
    display:flex;position:fixed;bottom:24px;right:24px;z-index:200;
    flex-direction:column;align-items:flex-end;gap:8px
  }
  .fab-toggle{
    width:52px;height:52px;border-radius:50%;background:var(--black);
    color:var(--yellow);border:none;font-size:22px;font-weight:800;
    cursor:pointer;box-shadow:0 6px 20px rgba(0,0,0,.2)
  }
  .fab-toggle.open{transform:rotate(45deg);background:var(--blue);color:#fff}
  .fab-menu{
    display:flex;flex-direction:column;gap:6px;
    opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s
  }
  .fab-nav.open .fab-menu{opacity:1;visibility:visible;transform:none}
  .fab-menu a{
    padding:10px 18px;background:var(--black);color:#fff;text-decoration:none;
    font-size:.8rem;font-weight:700;border-radius:999px;white-space:nowrap
  }
  .fab-menu a.on{background:var(--yellow);color:var(--black)}
  .site-foot{padding-bottom:100px}
}