/* BlurFold site — light "paper and steel" theme matching the app icon. */
:root{
  --bg:#f3f5f8; --bg2:#ffffff; --ink:#0f151c; --muted:#56616e;
  --line:rgba(15,21,28,.10); --card:#ffffff;
  --accent:#2d5f8f; --accent-soft:rgba(45,95,143,.10); --bar:#0f151c; --warn:#8a5300;
  --radius:20px; --maxw:1120px;
  --shadow:0 24px 60px -24px rgba(20,32,48,.30); --shadow-sm:0 8px 24px -12px rgba(20,32,48,.24);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);
  background:
    radial-gradient(90rem 40rem at 50% -12rem, #ffffff 0%, rgba(255,255,255,0) 62%),
    linear-gradient(180deg,#e6ebf1 0%,#f3f5f8 38%,#f3f5f8 100%);
  background-color:var(--bg);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,
    "Noto Sans","Noto Sans Arabic","Noto Sans Devanagari","Noto Sans JP","Noto Sans KR",
    "Noto Sans SC",Helvetica,Arial,sans-serif;
  line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
a:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3{line-height:1.14;letter-spacing:-.02em;margin:0}
h1{font-size:clamp(34px,6vw,58px);font-weight:800}
h2{font-size:clamp(26px,4vw,38px);font-weight:800}
p{margin:0}

/* Header */
header{position:sticky;top:0;z-index:50;backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  background:rgba(243,245,248,.78);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:-.01em}
.brand img{width:34px;height:34px;border-radius:9px}
.nav-links{display:flex;gap:22px;font-size:15px;font-weight:600;color:var(--muted)}
.nav-links a:hover{color:var(--ink)}
.lang{position:relative;display:flex;align-items:center;gap:8px}
.lang svg{width:18px;height:18px;color:var(--muted)}
select#lang{appearance:none;-webkit-appearance:none;border:1px solid var(--line);
  background:var(--bg2);color:var(--ink);font:inherit;font-size:14px;font-weight:600;
  padding:8px 30px 8px 12px;border-radius:11px;cursor:pointer;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2356616e' stroke-width='3'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat:no-repeat;background-position:right 10px center}
[dir="rtl"] select#lang{padding:8px 12px 8px 30px;background-position:left 10px center}

/* Hero */
.hero{position:relative;overflow:hidden;padding:clamp(42px,7vw,88px) 0 clamp(34px,5vw,64px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14.5px;
  letter-spacing:.01em;color:var(--accent)}
.eyebrow .dot{width:9px;height:9px;border-radius:2px;background:var(--bar)}
.hero h1{margin:14px 0 16px}
.hero .sub{font-size:clamp(16px,2vw,19px);color:var(--muted);max-width:34em}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 26px}
.chip{border:1px solid var(--line);background:var(--card);border-radius:999px;
  padding:8px 15px;font-size:13.5px;font-weight:600;color:var(--muted)}
.store{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:#fff;
  font-weight:800;font-size:15.5px;padding:13px 22px;border-radius:14px;box-shadow:0 10px 30px rgba(15,21,28,.22);
  text-decoration:none;transition:transform .15s ease,box-shadow .15s ease}
.store:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(15,21,28,.30)}
.store svg{width:18px;height:18px;flex:none}

/* Hero illustration (drawn in code, not a screenshot) */
.art-wrap{display:flex;justify-content:center}
.hero-art{width:100%;max-width:540px;height:auto;display:block;direction:ltr}

/* Sections */
section{padding:clamp(34px,5vw,64px) 0}
.section-head{max-width:680px;margin:0 auto 34px;text-align:center}
.section-head .sub{color:var(--muted);margin-top:10px;font-size:16.5px}

/* Cards */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow-sm)}
.card .ic{width:46px;height:46px;border-radius:13px;background:var(--accent-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ic svg{width:24px;height:24px}
.card h3{font-size:18.5px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}

/* Masks */
.mask-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.mask{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 14px 18px;box-shadow:var(--shadow-sm)}
.mask svg{width:100%;height:auto;display:block;border-radius:12px;direction:ltr}
.mask h3{font-size:16.5px;margin:14px 4px 6px}
.mask p{color:var(--muted);font-size:14px;margin:0 4px}
.note{display:flex;gap:16px;align-items:flex-start;margin-top:16px;background:#fff8ec;
  border:1px solid rgba(138,83,0,.22);border-radius:var(--radius);padding:20px 22px}
.note svg{width:26px;height:26px;flex:none;margin-top:2px}
.note h3{font-size:17px;margin-bottom:6px}
.note p{color:#5c4a33;font-size:15px}

/* Presets */
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.mode{display:flex;align-items:center;gap:18px;text-align:start}
.mode .ic{width:56px;height:56px;flex:none;margin-bottom:0;border-radius:16px}
.mode .ic svg{width:28px;height:28px}
.mode h3{margin-bottom:4px}
.tag{display:inline-block;margin-inline-start:8px;padding:1px 9px;border-radius:999px;vertical-align:middle;
  background:var(--ink);color:#fff;font-size:12px;font-weight:700;letter-spacing:.02em}

/* Mac and iPhone */
.device-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.device h3{font-size:21px;margin-bottom:14px}
.device ul{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.device li{position:relative;padding-inline-start:22px;color:var(--muted);font-size:15.5px}
.device li::before{content:"";position:absolute;inset-inline-start:0;top:.62em;
  width:10px;height:6px;border-radius:2px;background:var(--bar)}

/* Pro */
.pro{max-width:820px;margin:0 auto;text-align:center;padding:34px clamp(22px,5vw,48px)}
.pro h2{margin-bottom:14px}
.pro p{color:var(--muted);font-size:16.5px;max-width:40em;margin:0 auto}
.pro .free{margin-top:14px;color:var(--ink);font-weight:600}

/* CTA */
.cta{text-align:center}
.cta .req{color:var(--muted);max-width:36em;margin:14px auto 26px}

/* Footer */
footer{border-top:1px solid var(--line);padding:30px 0 40px;margin-top:20px}
.foot{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.foot nav{display:flex;gap:20px;flex-wrap:wrap;font-size:14.5px;color:var(--muted)}
.foot nav a:hover{color:var(--ink)}
.copy{color:var(--muted);font-size:13.5px;margin-top:18px}
.copy a{color:inherit}

/* Doc pages (privacy / support) */
.doc{max-width:760px;margin:0 auto;padding:clamp(40px,6vw,70px) 0 30px}
.doc h1{font-size:clamp(30px,5vw,44px);margin:12px 0 6px}
.doc .updated{color:var(--muted);font-size:14px;margin-bottom:22px}
.doc .intro{font-size:17px;color:var(--muted);margin-bottom:8px}
.doc h2{font-size:21px;margin:30px 0 10px}
.doc p{color:var(--muted);font-size:15.5px}
.doc .qa h2{font-size:18.5px}
.doc .contact-box{margin-top:34px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px}
.doc .contact-box h2{margin:0 0 8px}
.doc .contact-box a{color:var(--accent);font-weight:700}
.doc .back{display:inline-block;margin-top:36px;color:var(--accent);font-weight:700}

/* Responsive */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .feat-grid{grid-template-columns:1fr 1fr}
  .mask-grid{grid-template-columns:1fr 1fr}
  .mode-grid,.device-grid{grid-template-columns:1fr}
  .nav-links{display:none}
}
@media (max-width:520px){
  .feat-grid{grid-template-columns:1fr}
  select#lang{max-width:48vw;text-overflow:ellipsis}
  .note{flex-direction:column;gap:10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .store{transition:none}
  .store:hover{transform:none}
}