/* OPSIN marketing landing — warm, sun-forward, single column */
:root {
  --bg: #fdf8f0; --ink: #1d2430; --ink-2: #5b6472; --ink-3: #8a93a2;
  --accent: #f5a623; --accent-deep: #e8890c; --sun: #e8592f;
  --card: #ffffff; --radius: 18px; --shadow: 0 4px 20px rgba(30,40,60,.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  color: var(--ink); background: var(--bg);
  background-image: linear-gradient(180deg, #cfe8f5 0%, #fdf8f0 520px);
  background-repeat: no-repeat; line-height: 1.55; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-deep); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 22px; }

/* Nav */
.nav { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .5px; text-decoration: none; color: var(--ink); }
.brand .sun-dot { width: 26px; height: 26px; border-radius: 50%; background: radial-gradient(circle at 40% 35%, var(--accent), var(--sun)); box-shadow: 0 0 0 5px rgba(245,166,35,.18); }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { text-decoration: none; color: var(--ink-2); font-weight: 600; font-size: 15px; }
.nav-links a.cta { background: var(--accent); color: #fff; padding: 9px 16px; border-radius: 999px; }
@media (max-width: 620px){ .nav-links a:not(.cta){ display:none; } }

/* Hero */
.hero { text-align: center; padding: 40px 0 48px; }
.hero .sun-badge { width: 78px; height: 78px; margin: 0 auto 22px; border-radius: 50%; background: radial-gradient(circle at 42% 36%, #ffd27a, var(--sun)); box-shadow: 0 0 0 10px rgba(245,166,35,.14), 0 0 0 22px rgba(245,166,35,.07); }
.hero h1 { font-size: 46px; line-height: 1.08; letter-spacing: -1px; margin: 0 0 16px; }
.hero h1 .hl { color: var(--accent-deep); }
.hero p.sub { font-size: 19px; color: var(--ink-2); max-width: 620px; margin: 0 auto 28px; }
.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { text-decoration: none; font-weight: 700; font-size: 16px; padding: 14px 24px; border-radius: 999px; display: inline-block; }
.btn.primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(232,137,12,.28); }
.btn.dark { background: #1d2430; color: #fff; }
.btn.ghost { background: #fff; color: var(--ink); border: 1.5px solid #e4e7ec; }
.badge-soft { display:inline-block; background:#fff3dd; color:var(--accent-deep); font-weight:700; font-size:13px; padding:5px 13px; border-radius:999px; margin-bottom:20px; }

/* Section */
section.block { padding: 44px 0; }
section.block h2 { font-size: 30px; text-align: center; letter-spacing: -.5px; margin: 0 0 8px; }
section.block .lead { text-align: center; color: var(--ink-2); max-width: 640px; margin: 0 auto 30px; font-size: 16px; }

/* Problem/solution callout */
.contrast { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 620px){ .contrast { grid-template-columns: 1fr; } }
.contrast .col h4 { margin: 0 0 8px; font-size: 14px; text-transform: uppercase; letter-spacing: 1px; }
.contrast .bad h4 { color: #c0453a; } .contrast .good h4 { color: #2a9d54; }
.contrast p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* Feature grid */
.features { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
@media (max-width: 820px){ .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px){ .features { grid-template-columns: 1fr; } }
.feat { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.feat .ic { font-size: 26px; }
.feat h3 { margin: 10px 0 6px; font-size: 17px; }
.feat p { margin: 0; color: var(--ink-2); font-size: 14px; }

/* Scores row */
.scores { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
@media (max-width: 620px){ .scores { grid-template-columns: 1fr; } }
.score-card { text-align: center; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.score-card .ring { width: 90px; height: 90px; border-radius: 50%; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 22px; color: #fff; }

/* How it works */
.steps { counter-reset: s; display: flex; flex-direction: column; gap: 14px; max-width: 680px; margin: 0 auto; }
.step { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); padding: 18px 20px; display: flex; gap: 16px; align-items: flex-start; }
.step .n { counter-increment: s; background: var(--accent); color: #fff; font-weight: 800; width: 30px; height: 30px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex: none; }
.step .n::before { content: counter(s); }
.step h4 { margin: 0 0 3px; font-size: 16px; }
.step p { margin: 0; color: var(--ink-2); font-size: 14px; }

/* Science strip */
.science { background: #1d2430; color: #fff; border-radius: var(--radius); padding: 30px 26px; text-align: center; }
.science h2 { color: #fff; }
.science p { color: #c5cbd6; max-width: 680px; margin: 0 auto 12px; }
.science .cites { color: #8a93a2; font-size: 12.5px; }

/* Final CTA */
.final { text-align: center; padding: 50px 0; }
.final h2 { font-size: 32px; margin-bottom: 10px; }
.final p { color: var(--ink-2); margin: 0 auto 24px; max-width: 520px; }

/* Disclaimer + footer */
.disc { text-align: center; color: var(--ink-3); font-size: 12.5px; max-width: 720px; margin: 6px auto 0; }
footer.site { border-top: 1px solid #eceef2; margin-top: 30px; padding: 26px 0 50px; color: var(--ink-3); font-size: 14px; }
footer.site .cols { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
footer.site a { color: var(--ink-2); text-decoration: none; display: block; margin: 6px 0; font-size: 14px; }
footer.site .fh { font-weight: 700; color: var(--ink); margin-bottom: 6px; }