:root {
  --bg: #f6f8f7;
  --panel: #ffffff;
  --text: #0f1712;
  --muted: #5d6b63;
  --line: #e3e8e5;
  --accent: #16a34a;
  --accent-hi: #15803d;
  --accent-soft: rgba(22, 163, 74, 0.1);
  --dark: #0b100e;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 16px/1.6 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-hi); }
img { max-width: 100%; display: block; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(246, 248, 247, 0.86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.logo img { width: 32px; height: 32px; border-radius: 8px; }
.nav nav { display: flex; gap: 22px; align-items: center; }
.nav nav a { color: var(--muted); text-decoration: none; font-weight: 550; font-size: 15px; }
.nav nav a:hover { color: var(--text); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 12px; font-weight: 700; text-decoration: none;
  background: var(--accent); color: #fff; border: 1px solid var(--accent);
  transition: background 0.15s, transform 0.1s;
}
.btn:hover { background: var(--accent-hi); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn.ghost:hover { background: var(--panel); }
.nav .btn { padding: 9px 16px; font-size: 14px; }

/* hero */
.hero { padding: 72px 0 48px; text-align: center; background: radial-gradient(60% 60% at 50% 0%, var(--accent-soft), transparent 70%); }
.pill { display: inline-block; padding: 5px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-hi); font-weight: 700; font-size: 13px; margin-bottom: 18px; }
h1 { font-size: clamp(34px, 6vw, 58px); line-height: 1.05; letter-spacing: -0.035em; margin: 0 auto 18px; max-width: 820px; }
h1 em { font-style: normal; color: var(--accent); }
.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--muted); max-width: 640px; margin: 0 auto 30px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.note { color: var(--muted); font-size: 14px; margin-top: 14px; }
.hero-shot { margin: 48px auto 0; max-width: 1000px; border-radius: 18px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(15, 23, 18, 0.15); }

/* sections */
section { padding: 72px 0; }
h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.03em; line-height: 1.1; margin: 0 0 12px; text-align: center; }
.sub { text-align: center; color: var(--muted); max-width: 620px; margin: 0 auto 44px; font-size: 18px; }

.math { background: var(--dark); color: #e8eeea; }
.math h2 { color: #fff; }
.math .sub { color: #94a39b; }
.calc { max-width: 520px; margin: 0 auto; background: #121815; border: 1px solid #1f2925; border-radius: 18px; padding: 24px 26px; font-variant-numeric: tabular-nums; }
.calc .row { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid #1f2925; color: #b9c5be; }
.calc .row.neg span:last-child { color: #f87171; }
.calc .row.total { border: 0; padding-top: 14px; font-size: 22px; font-weight: 800; color: #4ade80; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 24px; }
.feature .ic { width: 42px; height: 42px; border-radius: 12px; background: var(--accent-soft); display: grid; place-items: center; font-size: 20px; margin-bottom: 14px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

.showcase { display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; align-items: center; }
.showcase img { border-radius: 16px; border: 1px solid var(--line); box-shadow: 0 20px 50px rgba(15, 23, 18, 0.12); }
.showcase .popup { max-width: 300px; margin: 0 auto; }
.showcase h3 { font-size: 26px; letter-spacing: -0.02em; margin: 0 0 10px; }
.showcase p { color: var(--muted); }

.pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; max-width: 960px; margin: 0 auto; }
.plan { position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 28px; display: flex; flex-direction: column; }
.plan.featured { border: 2px solid var(--accent); }
.plan .badge { position: absolute; top: -12px; right: 20px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 800; padding: 3px 10px; border-radius: 999px; }
.plan h3 { margin: 0; font-size: 16px; color: var(--muted); font-weight: 650; }
.plan .price { font-size: 40px; font-weight: 800; letter-spacing: -0.03em; margin: 6px 0 2px; }
.plan .price small { font-size: 16px; color: var(--muted); font-weight: 600; letter-spacing: 0; }
.plan ul { list-style: none; padding: 0; margin: 18px 0 24px; display: grid; gap: 8px; flex: 1; }
.plan li::before { content: "✓"; color: var(--accent); font-weight: 800; margin-right: 10px; }
.plan .btn { width: 100%; }
.price-note { text-align: center; color: var(--muted); font-size: 14px; margin-top: 22px; }

.faq { max-width: 760px; margin: 0 auto; }
.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; margin-bottom: 10px; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq p { color: var(--muted); margin: 10px 0 0; }

/* legal pages */
.legal { max-width: 780px; margin: 0 auto; padding: 56px 20px 80px; }
.legal h1 { font-size: clamp(30px, 5vw, 42px); text-align: left; margin: 0 0 6px; }
.legal .updated { color: var(--muted); margin: 0 0 32px; }
.legal h2 { font-size: 22px; text-align: left; margin: 32px 0 10px; letter-spacing: -0.01em; }
.legal p, .legal li { color: #2b3630; }
.legal .box { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; }

footer { border-top: 1px solid var(--line); padding: 36px 0; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--text); }

@media (max-width: 860px) {
  .features, .pricing, .showcase { grid-template-columns: 1fr; }
  .nav nav a:not(.btn) { display: none; }
  section { padding: 56px 0; }
}