:root {
  --bg: #f4f6f8; --surface: #ffffff; --border: #e2e6ea;
  --text: #1c2733; --muted: #6b7885; --primary: #1f6feb; --primary-dark: #1858c4;
  --success: #1a7f4b; --grad-a: #eef3fb; --grad-b: #f4f6f8;
  --shadow: 0 1px 3px rgba(20,30,45,.08), 0 1px 2px rgba(20,30,45,.06);
  --shadow-lg: 0 20px 45px rgba(20,30,45,.12);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a; --surface: #181f27; --border: #2b343e;
    --text: #e6ebf1; --muted: #93a1b0; --primary: #4d90f2; --primary-dark: #3b7de0;
    --success: #4ac585; --grad-a: #131a22; --grad-b: #0f141a;
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 1px 2px rgba(0,0,0,.3);
    --shadow-lg: 0 20px 45px rgba(0,0,0,.5);
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }
.brand { font-size: 1.4rem; font-weight: 800; letter-spacing: -.02em; color: var(--text); }
.brand span { color: var(--primary); }
.brand:hover { text-decoration: none; }

.btn { display: inline-block; padding: .7rem 1.3rem; border-radius: 9px; font-weight: 600; font-size: .95rem; cursor: pointer; border: 1px solid transparent; transition: transform .05s, box-shadow .2s; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { color: var(--text); border-color: var(--border); background: var(--surface); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: .95rem 1.8rem; font-size: 1.05rem; }

header.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
header.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
header.nav .actions { display: flex; align-items: center; gap: .6rem; }
header.nav .actions a.txt { color: var(--muted); font-weight: 600; font-size: .93rem; padding: .5rem .3rem; }
header.nav .actions a.txt:hover { color: var(--text); }

.hero { background: linear-gradient(160deg, var(--grad-a), var(--grad-b)); padding: 5rem 0 4.5rem; text-align: center; border-bottom: 1px solid var(--border); }
.hero .pill { display: inline-block; font-size: .8rem; font-weight: 600; color: var(--primary); background: color-mix(in srgb, var(--primary) 12%, transparent); padding: .35rem .8rem; border-radius: 999px; margin-bottom: 1.4rem; }
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.1; letter-spacing: -.03em; font-weight: 800; max-width: 20ch; margin: 0 auto 1.1rem; }
.hero h1 .accent { color: var(--primary); }
.hero p.sub { font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--muted); max-width: 46ch; margin: 0 auto 2rem; }
.hero .cta-row { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.hero .fine { margin-top: 1rem; font-size: .85rem; color: var(--muted); }

section { padding: 4.5rem 0; }
.section-head { text-align: center; max-width: 44ch; margin: 0 auto 3rem; }
.section-head h2 { font-size: clamp(1.7rem, 3.5vw, 2.3rem); letter-spacing: -.02em; margin-bottom: .6rem; }
.section-head p { color: var(--muted); font-size: 1.05rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.6rem; box-shadow: var(--shadow); }
.card .ico { font-size: 1.7rem; margin-bottom: .8rem; display: block; }
.card h3 { font-size: 1.15rem; margin-bottom: .4rem; }
.card p { color: var(--muted); font-size: .95rem; }

/* Pain → fix rows */
.painfix { max-width: 720px; margin: 0 auto; display: grid; gap: 1rem; }
.painfix .row { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.2rem 1.4rem; box-shadow: var(--shadow); }
.painfix .pain { font-weight: 600; }
.painfix .fix { color: var(--muted); margin-top: .3rem; }
.painfix .fix strong { color: var(--success); }

.price-card { max-width: 420px; margin: 0 auto; text-align: center; background: var(--surface); border: 2px solid var(--primary); border-radius: 18px; padding: 2.5rem 2rem; box-shadow: var(--shadow-lg); }
.price-card .amt { font-size: 3.4rem; font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.price-card .amt small { font-size: 1.1rem; font-weight: 600; color: var(--muted); }
.price-card ul { list-style: none; text-align: left; margin: 1.6rem 0; display: inline-block; }
.price-card li { padding: .35rem 0 .35rem 1.7rem; position: relative; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 700; }

.faq { max-width: 720px; margin: 0 auto; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.1rem 1.3rem; margin-bottom: .8rem; box-shadow: var(--shadow); }
.faq summary { font-weight: 600; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: .7rem; color: var(--muted); }

.cta-band { background: var(--primary); color: #fff; border-radius: 20px; text-align: center; padding: 3.2rem 1.5rem; }
.cta-band h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); margin-bottom: .6rem; }
.cta-band p { opacity: .92; margin-bottom: 1.6rem; }
.cta-band .btn-primary { background: #fff; color: var(--primary); }
.cta-band .btn-primary:hover { background: #eef3fb; }

/* Cross-trade links (internal linking for SEO) */
.trades { max-width: 720px; margin: 0 auto; text-align: center; }
.trades .chips { display: flex; flex-wrap: wrap; gap: .6rem; justify-content: center; margin-top: 1.4rem; }
.trades .chips a { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: .55rem 1.1rem; font-weight: 600; font-size: .9rem; color: var(--text); box-shadow: var(--shadow); }
.trades .chips a:hover { border-color: var(--primary); color: var(--primary); }
.trades .chips a[aria-current="page"] { background: var(--primary); color: #fff; border-color: var(--primary); }

footer { border-top: 1px solid var(--border); padding: 2.5rem 0; margin-top: 2rem; }
footer .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
footer .links a { color: var(--muted); font-size: .88rem; margin-left: 1.1rem; }
footer .links a:hover { color: var(--text); }
footer .copy { color: var(--muted); font-size: .85rem; }