: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: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 760px; 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; }

/* Nav */
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 .bar { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; display: flex; align-items: center; justify-content: space-between; height: 64px; }
header.nav .actions { display: flex; align-items: center; gap: 1rem; }
header.nav .actions a.txt { color: var(--muted); font-weight: 600; font-size: .93rem; }
header.nav .actions a.txt:hover { color: var(--text); text-decoration: none; }
.btn { display: inline-block; padding: .6rem 1.15rem; border-radius: 9px; font-weight: 600; font-size: .92rem; border: 1px solid transparent; background: var(--primary); color: #fff; box-shadow: var(--shadow); }
.btn:hover { background: var(--primary-dark); text-decoration: none; }

/* Article */
main { padding: 3rem 0 4rem; }
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: 1.5rem; }
.crumbs a { color: var(--muted); }
article h1 { font-size: clamp(1.9rem, 4.5vw, 2.7rem); line-height: 1.15; letter-spacing: -.02em; margin-bottom: .8rem; }
.meta { color: var(--muted); font-size: .9rem; margin-bottom: 2.2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
article h2 { font-size: 1.5rem; letter-spacing: -.01em; margin: 2.5rem 0 .9rem; }
article h3 { font-size: 1.2rem; margin: 1.8rem 0 .5rem; }
article p { margin-bottom: 1.1rem; }
article ul, article ol { margin: 0 0 1.1rem 1.3rem; }
article li { margin-bottom: .4rem; }
article strong { color: var(--text); }
.lead { font-size: 1.18rem; color: var(--muted); margin-bottom: 1.6rem; }

/* Callout / TL;DR */
.callout { background: var(--grad-a); border: 1px solid var(--border); border-left: 3px solid var(--primary); border-radius: 10px; padding: 1.2rem 1.4rem; margin: 1.6rem 0; }
.callout p:last-child { margin-bottom: 0; }

/* Comparison table */
.table-scroll { overflow-x: auto; margin: 1.6rem 0; border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; background: var(--surface); min-width: 520px; }
th, td { padding: .8rem 1rem; text-align: left; border-bottom: 1px solid var(--border); font-size: .92rem; }
thead th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--grad-a); }
tr:last-child td { border-bottom: none; }
td.best { color: var(--primary); font-weight: 600; }

/* Pick card */
.pick { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.5rem; box-shadow: var(--shadow); margin: 1.4rem 0; }
.pick .tag { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--primary); background: color-mix(in srgb, var(--primary) 12%, transparent); padding: .25rem .6rem; border-radius: 999px; margin-bottom: .7rem; }
.pick h3 { margin-top: 0; }
.prose-cta { background: var(--primary); color: #fff; border-radius: 16px; text-align: center; padding: 2.4rem 1.5rem; margin: 3rem 0 1rem; }
.prose-cta h2 { color: #fff; margin: 0 0 .5rem; }
.prose-cta p { opacity: .92; margin-bottom: 1.3rem; }
.prose-cta .btn { background: #fff; color: var(--primary); }

/* FAQ */
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1.2rem; margin-bottom: .7rem; }
.faq summary { font-weight: 600; cursor: pointer; }
.faq details p { margin: .6rem 0 0; color: var(--muted); }

/* Blog index cards */
.post-list { display: grid; gap: 1.2rem; margin-top: 2rem; }
.post-card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 1.5rem; box-shadow: var(--shadow); color: var(--text); }
.post-card:hover { border-color: var(--primary); text-decoration: none; transform: translateY(-1px); transition: transform .1s, border-color .2s; }
.post-card .cat { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--primary); }
.post-card h2 { font-size: 1.3rem; margin: .4rem 0 .5rem; }
.post-card p { color: var(--muted); font-size: .95rem; margin: 0; }
.post-card .date { color: var(--muted); font-size: .82rem; margin-top: .7rem; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 2.2rem 0; margin-top: 3rem; }
footer .row { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; 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 .copy { color: var(--muted); font-size: .85rem; }