/* Базовая типографика, контейнер, шапка, подвал, кнопки */
body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  width: 100%;
  max-width: var(--container-main);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-ink); text-decoration: underline; }

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  text-decoration: none;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease, transform .1s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-ink); color: #fff; }
.btn--ghost { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--on-dark { background: var(--color-accent); color: #fff; }
.btn--on-dark:hover { background: var(--color-accent-ink); color: #fff; }

/* ШАПКА */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex; align-items: center; gap: 24px;
  height: 64px;
}
.site-header__logo { font-weight: 800; font-size: 20px; color: var(--color-text); letter-spacing: -0.02em; }
.site-header__logo span { color: var(--color-accent); }
.site-nav { display: flex; gap: 22px; margin-left: auto; }
.site-nav a { color: var(--color-text-muted); font-size: 15px; font-weight: 500; }
.site-nav a:hover { color: var(--color-text); text-decoration: none; }
.site-header__cta { margin-left: 8px; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; padding: 8px; }
.nav-toggle svg { width: 26px; height: 26px; }

@media (max-width: 860px) {
  .site-nav, .site-header__cta { display: none; }
  .nav-toggle { display: block; }
  .site-header__inner.is-open { height: auto; flex-wrap: wrap; padding-bottom: 12px; }
  .site-header__inner.is-open .site-nav {
    display: flex; flex-direction: column; gap: 14px;
    width: 100%; order: 3; margin-left: 0;
  }
  .site-header__inner.is-open .site-header__cta { display: block; order: 4; width: 100%; }
  .site-header__inner.is-open .site-header__cta .btn { width: 100%; }
}

/* ПОДВАЛ */
.site-footer { background: var(--color-dark); color: var(--color-on-dark); margin-top: var(--space-section); }
.site-footer__inner { padding: 48px 20px 40px; }
.site-footer__grid { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; }
.site-footer h3 { font-size: 16px; margin-bottom: 12px; color: #fff; }
.site-footer a { color: var(--color-on-dark); }
.site-footer a:hover { color: #fff; }
.site-footer__contacts { display: flex; flex-direction: column; gap: 8px; font-size: 15px; }
.site-footer__bottom { margin-top: 32px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.12); font-size: 13px; color: #9fb0c4; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }

/* Утилиты */
.section { padding: var(--space-section) 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }