:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #1a2230;
  --ink-soft: #4a5568;
  --line: #e3e7ec;
  --denim: #3b5168;
  --denim-deep: #2a3b4d;
  --thread: #b9683f;
  --todo: #fff3bf;
  --radius: 14px;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--denim); }
a:hover { color: var(--denim-deep); }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
}

/* Header */
.site-header {
  background: linear-gradient(160deg, var(--denim) 0%, var(--denim-deep) 100%);
  color: #fff;
  padding: 28px 0;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.mark {
  width: 46px; height: 46px;
  border-radius: 11px;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,.18) 0 3px, transparent 3px 6px),
    #6f8aa6;
  border: 1px solid rgba(255,255,255,.35);
  flex: none;
}
.site-header h1, .site-header .brand-name {
  font-size: 19px;
  margin: 0;
  font-weight: 650;
  letter-spacing: .2px;
}
.site-header nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
  font-size: 15px;
}
.site-header nav a { color: rgba(255,255,255,.85); text-decoration: none; }
.site-header nav a:hover { color: #fff; }

/* Content */
main { padding: 44px 0 64px; }
main .wrap > h1 {
  font-size: 30px;
  line-height: 1.2;
  margin: 0 0 6px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: 12px;
  font-weight: 700;
  color: var(--thread);
  margin: 0 0 10px;
}
.updated { color: var(--ink-soft); font-size: 14px; margin: 0 0 30px; }

h2 {
  font-size: 21px;
  margin: 38px 0 10px;
  padding-top: 6px;
}
h3 { font-size: 17px; margin: 24px 0 6px; }
p, li { color: var(--ink); }
ul { padding-left: 22px; }
li { margin: 6px 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  margin-bottom: 22px;
}

/* Placeholder highlight — REPLACE everything highlighted */
.todo {
  background: var(--todo);
  padding: 1px 6px;
  border-radius: 5px;
  font-weight: 600;
  white-space: nowrap;
}

/* Marketing hero */
.hero { text-align: center; padding: 8px 0 30px; }
.hero .tagline { font-size: 19px; color: var(--ink-soft); margin: 8px 0 26px; }
.btn {
  display: inline-block;
  background: var(--denim);
  color: #fff;
  text-decoration: none;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 16px;
}
.btn:hover { background: var(--denim-deep); color: #fff; }
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 12px;
}
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.feature h3 { margin-top: 0; }
.feature p { color: var(--ink-soft); margin: 0; font-size: 15px; }

footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
  color: var(--ink-soft);
  font-size: 14px;
  text-align: center;
}
footer a { color: var(--ink-soft); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  main .wrap > h1 { font-size: 25px; }
  .features { grid-template-columns: 1fr; }
  .site-header nav { width: 100%; margin-left: 0; }
}