/* Общие стили страниц проекта «Звёздный курс» */

:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #1d1d1f;
  --muted: #6b6b70;
  --line: #e2e2df;
  --accent: #1c5d99;
  --warn: #a8442a;
  --ok: #2f7d4f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

header {
  background: #12161c;
  color: #fff;
  padding: 28px 0 22px;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

header h1 { margin: 0 0 6px; font-size: 26px; }
header p { margin: 0; color: #b9c2cc; }
header a { color: #9ecbff; }

nav { margin-top: 14px; }
nav a {
  display: inline-block;
  margin-right: 16px;
  color: #cfe4ff;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
nav a:hover, nav a.on { border-bottom-color: #cfe4ff; }

main { padding: 28px 0 60px; }

section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px 24px;
  margin-bottom: 22px;
}

h2 { margin: 0 0 14px; font-size: 21px; }
h3 { margin: 22px 0 8px; font-size: 17px; }
h3:first-child { margin-top: 0; }

p { margin: 0 0 12px; }
ul, ol { margin: 0 0 12px; padding-left: 22px; }
li { margin-bottom: 6px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 16px;
  font-size: 15px;
}
th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { background: #f2f4f6; font-weight: 600; }
td.num, th.num { text-align: right; white-space: nowrap; }

.note {
  border-left: 3px solid var(--accent);
  background: #f2f7fc;
  padding: 12px 16px;
  margin: 14px 0;
  border-radius: 0 8px 8px 0;
}
.warn {
  border-left: 3px solid var(--warn);
  background: #fdf3f0;
  padding: 12px 16px;
  margin: 14px 0;
  border-radius: 0 8px 8px 0;
}
.ok { color: var(--ok); font-weight: 600; }
.bad { color: var(--warn); font-weight: 600; }
.muted { color: var(--muted); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  background: #fcfcfb;
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

.file {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}
.file:last-child { border-bottom: none; }
.file code { background: #f2f4f6; padding: 1px 6px; border-radius: 4px; }

.download {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 9px 18px;
  border-radius: 8px;
  font-weight: 600;
  margin: 4px 8px 4px 0;
}
.download:hover { background: #164a7a; }
.download.alt { background: #40566b; }

footer {
  border-top: 1px solid var(--line);
  padding: 18px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

code, pre { font-family: "Cascadia Mono", Consolas, monospace; font-size: 14px; }
pre {
  background: #f2f4f6;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
}