/* Каркас: плашка демо, шапка, подвал, sticky-звонок, заголовки секций */

.demo-strip {
  background: var(--ink);
  color: var(--on-ink);
  font-size: var(--fs-micro);
  letter-spacing: 0.02em;
  text-align: center;
  padding: 0.3rem var(--gutter);
}

/* шапка */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--rule-strong);
}
.header__row {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  margin-right: auto;
  min-width: 0;
}
.logo__mark { width: 2.25rem; height: 2.25rem; flex: none; }
.logo__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.75rem;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.nav { display: none; }
.nav__list { display: flex; gap: clamp(1rem, 2vw, 2rem); }
.nav a {
  position: relative;
  display: inline-block;
  padding-block: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.25rem;
  height: 2px;
  background: var(--stamp);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }

.header__phone {
  display: none;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}
.header__phone:hover { color: var(--stamp); }
.header .header__call { display: none; }

.menu { position: relative; }
.menu > summary {
  list-style: none;
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--ink);
}
.menu > summary::-webkit-details-marker { display: none; }
.menu .icon--close { display: none; }
.menu[open] .icon--open { display: none; }
.menu[open] .icon--close { display: block; }
.menu__panel {
  position: fixed;
  inset: auto 0 0 0;
  top: var(--menu-top, 4.25rem);
  z-index: 39;
  background: var(--ink);
  color: var(--on-ink);
  padding: 1.5rem var(--gutter) 2rem;
  overflow-y: auto;
  border-top: 1px solid var(--ink);
}
.menu__panel li + li { border-top: 1px solid var(--rule-on-ink); }
.menu__panel a {
  display: block;
  padding-block: 0.8rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.5rem;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
}
.menu__phone { margin-top: 1.5rem; font-size: var(--fs-small); color: var(--on-ink-soft); }
.menu__phone a { font-family: var(--font-text); font-weight: 600; font-size: 1.25rem; text-transform: none; color: var(--on-ink); padding-block: 0.25rem; }

@media (min-width: 62rem) {
  .menu { display: none; }
  .nav { display: block; margin-right: 1rem; }
  .header__phone { display: inline; }
  .header .header__call { display: inline-flex; }
}

/* заголовок секции: графа документа */
.sec { padding-block: var(--section); }
.sec-head {
  display: grid;
  gap: 1rem 2rem;
  margin-bottom: clamp(2rem, 1rem + 4vw, 4.5rem);
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--fs-micro);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.eyebrow::after { content: ""; flex: 1; height: 1px; background: currentColor; opacity: 0.35; }
.eyebrow__n { color: var(--stamp); font-variant-numeric: tabular-nums; }
.on-ink .eyebrow__n { color: var(--stamp-on-ink); }
.sec-head h2 { font-size: var(--fs-h2); max-width: 14em; }
.sec-head--solo h2 { max-width: none; }
.sec-head__text { max-width: 34rem; font-size: var(--fs-lead); color: var(--ink-text); align-self: end; }
.on-ink .sec-head__text { color: var(--on-ink-soft); }
@media (min-width: 62rem) {
  .sec-head { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .sec-head .eyebrow { grid-column: 1 / -1; }
  .sec-head--solo h2 { grid-column: 1 / -1; }
}

.on-ink { background: var(--ink); color: var(--on-ink); }

/* подвал */
.footer { padding-block: 2.5rem; border-top: 1px solid var(--rule-strong); font-size: var(--fs-small); color: var(--ink-text); }
.footer__row { display: grid; gap: 1rem 2rem; }
.footer__brand { font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; line-height: 1; text-transform: uppercase; color: var(--ink); }
.footer__links { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
.footer__links a { display: inline-block; padding-block: 0.3rem; }
.footer__links a:hover, .footer a:hover { color: var(--stamp); }
@media (min-width: 62rem) {
  .footer__row { grid-template-columns: auto 1fr auto; align-items: center; }
}

/* sticky-звонок */
.callbar {
  position: fixed;
  z-index: 30;
  inset: auto 0 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--ink);
  padding-bottom: env(safe-area-inset-bottom);
}
.callbar a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3.5rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--on-ink);
}
.callbar a:last-child { background: var(--stamp); color: #fff; }
.callbar a:active { filter: brightness(0.9); }
body:has(.callbar) { padding-bottom: calc(3.5rem + env(safe-area-inset-bottom)); }
@media (min-width: 62rem) {
  .callbar { display: none; }
  body:has(.callbar) { padding-bottom: 0; }
}