/* Мобильные-first, системные шрифты, минимум веса */
:root {
  --blue: #0b57a4;
  --blue-dark: #084281;
  --bg: #fff;
  --bg-soft: #f2f6fa;
  --text: #1a1a1a;
  --muted: #5a6572;
  --border: #d7dfe7;
  --green: #1e7e34;
  --red: #b02a37;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

h1 { font-size: 1.65rem; line-height: 1.25; margin: 0.8em 0 0.5em; }
h2 { font-size: 1.3rem; margin: 1.4em 0 0.5em; }
h3 { font-size: 1.1rem; margin: 1.2em 0 0.4em; }
p, ul, ol { margin: 0.6em 0; }
a { color: var(--blue); }

.site-header { background: var(--blue); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; }
.logo { color: #fff; font-weight: 700; text-decoration: none; font-size: 1.05rem; }
.nav a { color: #dce9f7; text-decoration: none; margin-left: 14px; font-size: 0.95rem; }
.nav a:hover { color: #fff; }

.site-footer { background: var(--bg-soft); border-top: 1px solid var(--border); margin-top: 40px; padding: 20px 0 28px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-nav a { font-size: 0.92rem; color: var(--blue-dark); }
.footer-note { font-size: 0.82rem; color: var(--muted); margin-top: 14px; }

/* Карточки и блоки */
.card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin: 16px 0; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }
.note { border-left: 4px solid var(--blue); background: var(--bg-soft); padding: 10px 14px; margin: 14px 0; font-size: 0.95rem; }
.warn { border-left-color: var(--red); }
.ok { border-left-color: var(--green); }
.date-updated { font-size: 0.85rem; color: var(--muted); }

/* Формы */
form .field { margin: 12px 0; }
label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 0.95rem; }
input[type=text], input[type=tel], input[type=email], input[type=number], select, textarea {
  width: 100%; padding: 11px 12px; font-size: 1rem; border: 1px solid var(--border);
  border-radius: 8px; background: #fff; color: var(--text);
}
textarea { min-height: 90px; resize: vertical; }
.btn {
  display: inline-block; background: var(--blue); color: #fff; border: 0; cursor: pointer;
  padding: 13px 22px; font-size: 1.05rem; border-radius: 8px; text-decoration: none;
}
.btn:hover { background: var(--blue-dark); }
.btn-lg { width: 100%; text-align: center; }

/* Результат калькулятора */
.result { display: none; }
.result.show { display: block; }

/* Таблицы */
table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 0.95rem; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--bg-soft); }
.table-scroll { overflow-x: auto; }

/* Тренажёр теста */
.trainer-head { display: flex; justify-content: space-between; align-items: center; font-size: 0.9rem; color: var(--muted); }
.timer { font-weight: 700; color: var(--blue-dark); font-variant-numeric: tabular-nums; }
.q-text { margin-top: 8px; }
.q-options { display: flex; flex-direction: column; gap: 8px; margin: 12px 0; }
.q-opt { text-align: left; padding: 12px 14px; font-size: 1rem; background: #fff;
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer; color: var(--text); }
.q-opt:hover:not(:disabled) { border-color: var(--blue); }
.opt-right { border-color: var(--green); background: #eaf6ec; }
.opt-wrong { border-color: var(--red); background: #fbecee; }
.trainer-menu { display: flex; gap: 12px; flex-wrap: wrap; }
.trainer-menu .btn { flex: 1; min-width: 200px; }
.trainer-menu small { font-weight: 400; opacity: 0.85; }

@media (min-width: 700px) {
  h1 { font-size: 2rem; }
  body { font-size: 18px; }
}