/* Eduvora static site styles. Mobile-first, system fonts, brand blue #2563EB. */
:root {
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-soft: #eff4ff;
  --text: #1b2430;
  --muted: #5b6675;
  --bg: #ffffff;
  --card: #f6f8fb;
  --line: #e1e6ee;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--brand); }
a:hover { color: var(--brand-dark); }

img { max-width: 100%; height: auto; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 720px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 16px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--brand);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 2px 4px; }
.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: .95rem;
  padding: 8px 10px;
  border-radius: 8px;
}
.site-nav a:hover { background: var(--brand-soft); color: var(--brand-dark); }
.site-nav a[aria-current="page"] { color: var(--brand); font-weight: 700; }

/* Layout */
main { display: block; padding-bottom: 56px; }
article, .page { padding-top: 24px; }

h1 { font-size: 1.9rem; line-height: 1.2; margin: .4em 0 .3em; letter-spacing: -0.015em; }
h2 { font-size: 1.3rem; line-height: 1.3; margin: 1.8em 0 .45em; }
h3 { font-size: 1.05rem; margin: 1.4em 0 .3em; }
p, li { font-size: 1.02rem; }
ul, ol { padding-left: 1.3em; }
li { margin: .3em 0; }

.muted { color: var(--muted); font-size: .9rem; }
.lead { font-size: 1.15rem; color: #2f3b4b; }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--brand-soft), #ffffff);
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--line);
}
.hero h1 { font-size: 2.1rem; margin-top: 0; }
.hero .lead { max-width: 640px; }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 10px;
  margin: 6px 8px 6px 0;
}
.btn:hover { background: var(--brand-dark); color: #fff; }
.btn.secondary {
  background: #fff;
  color: var(--brand);
  border: 1.5px solid var(--brand);
  padding: 10.5px 20.5px;
}
.btn.secondary:hover { background: var(--brand-soft); color: var(--brand-dark); }

/* Cards and grids */
.grid { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 18px 0; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.card h3 { margin-top: 0; }
.card p { margin: .4em 0 0; }
.card a.card-link { text-decoration: none; }
.card a.card-link:hover { text-decoration: underline; }

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 4px 0 4px 48px;
  margin: 14px 0;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  text-align: center;
  line-height: 34px;
}

.note {
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 22px 0;
}
.note p { margin: 0; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 16px 0; }
table { border-collapse: collapse; width: 100%; min-width: 420px; font-size: .97rem; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
th { background: var(--card); }

/* FAQ */
details { border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; margin: 10px 0; background: var(--card); }
summary { cursor: pointer; font-weight: 700; }
details p { margin: .6em 0 .2em; }

.related { margin-top: 36px; padding-top: 8px; border-top: 1px solid var(--line); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 24px 0 36px;
  font-size: .92rem;
  color: var(--muted);
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 4px 18px; margin-bottom: 10px; }
.site-footer a { color: var(--text); }
.site-footer p { font-size: .9rem; margin: .3em 0; }

@media (min-width: 640px) {
  h1 { font-size: 2.3rem; }
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 2.8rem; }
  .grid.two { grid-template-columns: 1fr 1fr; }
  .grid.three { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 900px) {
  .grid.three { grid-template-columns: 1fr 1fr 1fr; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #6ea0ff;
    --brand-dark: #93b7ff;
    --brand-soft: #172338;
    --text: #e6ebf0;
    --muted: #9aa6b4;
    --bg: #12171d;
    --card: #1a212a;
    --line: #2a3340;
  }
  .lead { color: #c3ccd6; }
  .hero { background: linear-gradient(180deg, #172338, #12171d); }
  .btn, .btn:hover { color: #0c1220; }
  .btn.secondary { background: transparent; color: var(--brand); }
  .btn.secondary:hover { color: var(--brand-dark); }
  .steps li::before { color: #0c1220; }
}