/* School Pulse marketing site — small, dependency-free, theme-aware. */
:root {
  --ink: #0c1116;
  --muted: #55606b;
  --line: #e3e7ec;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --brand: #0b5fff;
  --brand-ink: #ffffff;
  --radius: 10px;
  --wrap: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef2f6;
    --muted: #a3aeb9;
    --line: #232a31;
    --bg: #0c1116;
    --bg-soft: #141b22;
    --brand: #4d8bff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
a { color: var(--brand); }
img { max-width: 100%; height: auto; }
h1, h2, h3 { line-height: 1.25; color: var(--ink); }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 .5em; }
h2 { font-size: clamp(1.3rem, 2.6vw, 1.7rem); margin: 2em 0 .6em; }
h3 { font-size: 1.05rem; margin: 0 0 .3em; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--brand); color: var(--brand-ink);
  padding: 10px 16px; border-radius: 0 0 var(--radius) 0; z-index: 10;
}
.skip-link:focus { left: 0; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky; top: 0; z-index: 5;
}
.site-header .wrap {
  display: flex; align-items: center; gap: 20px;
  min-height: 64px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.site-header nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: 18px; flex-wrap: wrap;
}
.site-header nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.site-header nav a:hover { color: var(--ink); }
.header-cta { margin-left: auto; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: var(--radius);
  text-decoration: none; font-weight: 600; font-size: .98rem;
  border: 1px solid transparent;
}
.btn-primary { background: var(--brand); color: var(--brand-ink); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost { border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { background: var(--bg-soft); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 1.4em 0 0; }

main { padding: 40px 20px 8px; }
.hero { max-width: 760px; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; color: var(--muted); margin: 0 0 .8em; }
.lede { font-size: 1.15rem; color: var(--muted); }
.note {
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 16px; font-style: italic; color: var(--muted);
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--muted); }

.grid { list-style: none; margin: 1.2em 0 0; padding: 0; display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid li { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; background: var(--bg); }
.grid li p { margin: .2em 0 0; color: var(--muted); font-size: .96rem; }

.checks { margin: 1em 0 0; padding: 0 0 0 1.1em; }
.checks li { margin: .5em 0; }

.cta {
  margin: 3em 0 1em; padding: 28px 24px;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
}
.cta h2 { margin-top: 0; }

.site-footer { border-top: 1px solid var(--line); margin-top: 3em; padding: 32px 20px; background: var(--bg-soft); }
.foot-brand { margin: 0 0 1em; }
.foot-links { list-style: none; margin: 0 0 1em; padding: 0; display: flex; gap: 14px 22px; flex-wrap: wrap; }
.foot-links a { color: var(--muted); text-decoration: none; font-size: .92rem; }
.foot-links a:hover { color: var(--ink); }
.foot-contact, .foot-fine { margin: .4em 0 0; color: var(--muted); font-size: .9rem; }

:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }