/* RoundPro — roundpro.net (single-page launch version) */
:root {
  --paper: #F3F4F7;
  --card: #FFFFFF;
  --ink: #15161A;
  --ink-2: #565B66;
  --ink-3: #8A8F9A;
  --line: #E1E3E9;
  --rule: #CDD0D8;
  --mint: #0FAF68;
  --mint-hi: #4AFFA4;
  --spec: #3A66F5;
  --panel: #232326;
  --r-outer: 32px; --r-inner: 20px; --r-card: 28px; --r-pill: 999px;
  --shadow: 0 1px 2px rgba(21,22,26,.04), 0 12px 32px rgba(40,52,110,.07);
  --font: "Schibsted Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --wrap: 1120px;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); font-size: 17px; line-height: 1.55; color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(900px 600px at 100% 0%, rgba(220,227,255,.9), transparent 60%),
    radial-gradient(800px 700px at 0% 100%, rgba(220,227,255,.6), transparent 60%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--spec); outline-offset: 3px; border-radius: 6px; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
h1, h2, h3 { margin: 0; font-weight: 800; letter-spacing: -.035em; line-height: 1.04; }
p { margin: 0 0 1em; }

/* Nav */
.nav { position: sticky; top: 14px; z-index: 50; padding: 0 20px; }
.nav-bar {
  max-width: var(--wrap); margin: 0 auto; display: flex; align-items: center; gap: 22px;
  padding: 7px 7px 7px 20px; border-radius: var(--r-pill);
  background: rgba(255,255,255,.85); backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border: 1px solid var(--line); box-shadow: var(--shadow);
}
.brand img { height: 22px; width: auto; }
.nav-links { display: flex; gap: 22px; }
.nav-links a { text-decoration: none; color: var(--ink-2); font-size: 15px; font-weight: 500; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--ink); }
.nav-cta { margin-left: auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; font: 600 15px/1 var(--font);
  padding: 14px 20px; border-radius: var(--r-pill); text-decoration: none; border: 1px solid transparent; white-space: nowrap;
}
.btn-buy { background: var(--ink); color: #fff; }
.btn-buy:hover { background: #000; }
.btn-buy .price { color: var(--mint-hi); }
.btn-ghost { background: var(--card); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: #c4c8d2; }

/* Hero */
.hero { padding: 72px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 560px 1fr; gap: 40px; align-items: center; }
.hero-mark { width: min(380px, 85%); height: auto; margin: 0 0 20px -4px; }
.hero h1 { font-size: clamp(34px, 3.4vw, 44px); max-width: 12em; }
.lede { font-size: 18px; color: var(--ink-2); max-width: 30em; margin: 18px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.hero-meta { margin: 16px 0 0; font-size: 14px; color: var(--ink-3); }
.stage { position: relative; display: grid; justify-items: center; padding: 20px 0 40px; }
.panel {
  width: min(311px, 70%); height: auto; position: relative; z-index: 1;
  filter: drop-shadow(0 30px 40px rgba(25,32,80,.26)) drop-shadow(0 4px 8px rgba(0,0,0,.12));
}
.floor {
  position: absolute; bottom: 0; width: min(300px, 66%); height: 36px;
  background: radial-gradient(closest-side, rgba(25,32,80,.22), transparent);
}

/* FAQ */
.faq-sec { padding: 56px 0 88px; }
.faq-sec h2 { font-size: clamp(34px, 4vw, 48px); text-align: center; margin-bottom: 32px; }
.faq { max-width: 780px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  list-style: none; cursor: pointer; padding: 22px 44px 22px 0; position: relative;
  font-size: 19px; font-weight: 600; letter-spacing: -.01em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before, .faq summary::after {
  content: ""; position: absolute; right: 4px; top: 50%; width: 14px; height: 2px; border-radius: 2px; background: var(--ink-3);
  transition: transform .2s ease;
}
.faq summary::after { transform: rotate(90deg); }
.faq details[open] summary::after { transform: rotate(0deg); }
.faq details p { color: var(--ink-2); font-size: 16px; max-width: 62ch; margin: -6px 0 22px; }

/* Footer */
footer { padding: 0 0 56px; color: var(--ink-3); font-size: 14px; }
.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; border-top: 1px solid var(--rule); padding-top: 20px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 20px; }
.foot a { text-decoration: none; color: var(--ink-2); }
.foot a:hover { color: var(--ink); }
.foot-thumb { display: block; max-width: 520px; margin: 0 auto 40px; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #fff; }
.foot-thumb img { width: 100%; height: auto; }

/* ---------- Guide article ---------- */
.article { max-width: 720px; margin: 0 auto; padding: 72px 20px 40px; }
.crumbs { font-size: 14px; color: var(--ink-3); margin-bottom: 28px; }
.crumbs a { color: var(--ink-2); text-decoration: none; }
.sheet-rule { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--rule); padding-top: 12px; font-size: 14px; color: var(--ink-2); }
.article h1 { font-size: clamp(40px, 6vw, 64px); margin-top: 28px; }
.byline { color: var(--ink-3); font-size: 15px; margin-top: 20px; }
.answer { margin: 36px 0 8px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card); padding: 24px 26px; box-shadow: var(--shadow); }
.article .answer h2 { font-size: 17px; letter-spacing: 0; margin: 0 0 10px; color: var(--mint); }
.answer p:last-child { margin-bottom: 0; }
.article h2 { font-size: clamp(28px, 3.4vw, 38px); margin: 64px 0 18px; line-height: 1.08; }
.article h3 { font-size: 21px; letter-spacing: -.015em; line-height: 1.2; font-weight: 700; margin: 32px 0 10px; }
.article p, .article li { color: #2D3038; }
.article ol, .article ul { padding-left: 1.3em; margin: 0 0 1.2em; }
.article li { margin-bottom: .5em; }
.article code { font-family: var(--mono); font-size: .86em; background: #E9EBF1; padding: 2px 6px; border-radius: 6px; }
.note { border-left: 3px solid var(--spec); padding: 4px 0 4px 16px; color: var(--ink-2); margin: 0 0 1.4em; }
.limit-list { list-style: none; padding: 0 !important; }
.limit-list li { padding-left: 22px; position: relative; }
.limit-list li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 9px; height: 9px; border: 1.5px dashed var(--spec); border-radius: 50%; }
.toc { background: rgba(255,255,255,.6); border: 1px solid var(--line); border-radius: 20px; padding: 18px 22px; margin: 28px 0 0; }
.toc strong { display: block; font-size: 14px; color: var(--ink-3); font-weight: 600; margin-bottom: 6px; }
.toc ol { margin: 0; }
.toc a { text-decoration: none; color: var(--ink); }
.toc a:hover { color: var(--spec); }
.compare { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card); box-shadow: var(--shadow); margin: 8px 0 24px; }
.compare table { width: 100%; border-collapse: collapse; min-width: 560px; font-size: 15px; }
.compare th, .compare td { text-align: left; padding: 16px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare thead th { font-weight: 600; color: var(--ink-2); font-size: 14px; }
.compare tbody th { font-weight: 600; }
.compare tr:last-child th, .compare tr:last-child td { border-bottom: 0; }
.compare .rp { background: #F1FBF6; }
.inline-cta { margin: 48px 0; background: var(--ink); color: #fff; border-radius: var(--r-card); padding: 28px; display: flex; gap: 20px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.inline-cta p { color: #C4C7D0; margin: 4px 0 0; }
.inline-cta strong { font-size: 20px; letter-spacing: -.01em; }
.inline-cta .btn-buy { background: var(--mint-hi); color: var(--ink); }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 24px; }
  .stage { padding-top: 8px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav { top: 10px; padding: 0 12px; }
  .nav-bar { gap: 16px; padding-left: 16px; }
  .nav-links { display: none; }
  .btn { padding: 12px 16px; }
  .hero { padding-top: 44px; }
  .faq summary { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } html { scroll-behavior: auto; } }