/* Ozevo public pages. One small stylesheet, light and dark, mobile first. */
:root {
  --bg: #f6f7f6;
  --card: #ffffff;
  --ink: #1b1f1c;
  --muted: #5f6662;
  --line: #e3e6e3;
  --accent: #146c43;
  --on-accent: #ffffff;
  --accent-soft: #d5f0e1;
  --radius: 16px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1412;
    --card: #18201c;
    --ink: #e8ece9;
    --muted: #a3ada7;
    --line: #2a332e;
    --accent: #4fd49a;
    --on-accent: #00301d;
    --accent-soft: #1c3a2c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.wrap { width: 100%; max-width: 760px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--on-accent); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; top: 8px; }

.top { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top-in { display: flex; align-items: center; gap: 10px; min-height: 56px; }
.brand { font-weight: 700; font-size: 17px; color: var(--ink); text-decoration: none; margin-right: auto; }
.top nav { display: flex; gap: 10px; }
.top nav a { color: var(--ink); text-decoration: none; font-weight: 500; padding: 8px 2px; }
.top nav a:hover { color: var(--accent); }

.btn {
  display: inline-block; background: var(--accent); color: var(--on-accent); font-weight: 600;
  padding: 12px 20px; border-radius: 999px; text-decoration: none; min-height: 44px; line-height: 1.3;
}
.btn:hover { filter: brightness(1.08); }
.btn { white-space: nowrap; }
.btn-small { padding: 8px 12px; min-height: 40px; font-size: 14px; }
.btn-ghost { background: transparent; color: var(--accent); border: 2px solid var(--accent); padding: 10px 18px; }

main { padding-top: 20px; padding-bottom: 40px; }
h1 { font-size: 28px; line-height: 1.2; margin: 8px 0 12px; }
h2 { font-size: 21px; line-height: 1.3; margin: 32px 0 10px; }
h3 { font-size: 16px; margin: 16px 0 6px; }
h4 { font-size: 16px; margin: 14px 0 4px; }
p { margin: 0 0 12px; }
.lead { font-size: 18px; color: var(--ink); }
.meta, .small { color: var(--muted); font-size: 14px; }
.cta .btn { white-space: normal; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin: 16px 0 20px; }
.crumbs { font-size: 14px; color: var(--muted); }
.crumbs a { color: var(--muted); }
.draft {
  display: inline-block; vertical-align: middle; font-size: 12px; font-weight: 500; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 1px 9px; margin-left: 6px;
}
.chip { font-size: 12px; font-weight: 500; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; margin-left: 6px; }
.note { margin-top: 20px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin: 0 0 12px; }
.card summary { cursor: pointer; font-weight: 600; font-size: 17px; padding: 14px 16px; list-style: none; display: flex; justify-content: space-between; align-items: center; min-height: 48px; }
.card summary::-webkit-details-marker { display: none; }
.card summary::after { content: "+"; font-size: 22px; color: var(--muted); line-height: 1; }
.card[open] summary::after { content: "\2212"; }
.card .body { padding: 0 16px 14px; }
.card ul, .card ol { margin: 0 0 8px; padding-left: 22px; }
.card li { margin: 0 0 6px; }
ul.ticks { list-style: none; padding-left: 0; }
ul.ticks li { padding-left: 24px; position: relative; }
ul.ticks li::before { content: "\2713"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.levels { list-style: none; padding-left: 0 !important; }
.levels li { display: flex; gap: 12px; align-items: flex-start; }
.lvl { flex: none; width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--ink); font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; justify-content: center; }
.drill { margin-bottom: 8px; }
.drill h4 { margin-top: 8px; }

.grid { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 12px; grid-template-columns: 1fr; }
.gcard { display: block; height: 100%; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; color: var(--ink); text-decoration: none; }
.gcard:hover { border-color: var(--accent); }
.gcard h2 { margin: 0 0 6px; font-size: 18px; }
.gcard p { color: var(--muted); font-size: 14px; margin: 0 0 10px; }
.more-link { color: var(--accent); font-weight: 600; font-size: 14px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips a { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; text-decoration: none; color: var(--ink); font-size: 14px; }
.chips a:hover { border-color: var(--accent); color: var(--accent); }
.features, section > ul { padding-left: 20px; }
.features li, section > ul li { margin-bottom: 8px; }

.foot { border-top: 1px solid var(--line); background: var(--card); padding: 20px 0 28px; }
.foot p { margin: 0 0 6px; }
.foot .links { display: flex; flex-wrap: wrap; gap: 6px 16px; }

@media (min-width: 560px) {
  .grid { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 34px; }
}
@media (min-width: 760px) {
  .grid { grid-template-columns: 1fr 1fr 1fr; }
  .wrap { padding: 0 24px; }
}
@media (prefers-reduced-motion: no-preference) {
  .gcard, .btn { transition: border-color 0.15s, filter 0.15s; }
}