/* layout.css — container, sticky header, burger menu, footer, grids, breakpoints (Design!A34:A40).
   Breakpoints: <480 phone portrait · 480–767 · 768–1023 tablet portrait · 1024–1279 tablet landscape ·
   1280–1439 desktop (1200px) · ≥1440 wide (1320px) · landscape with max-height 500px = phone landscape. */

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
}
.container--narrow { max-width: calc(var(--container-narrow) + 2 * var(--gutter)); }

.section { padding-block: var(--section-y); }
.section + .section { padding-top: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 15, 19, .88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding-top: env(safe-area-inset-top);
}
.site-header__bar {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  min-height: var(--header-h);
}
.site-header__logo { flex: 0 0 auto; display: inline-flex; }
.site-header__logo img { height: 48px; width: auto; }
.site-header__panel {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  margin-left: auto;
}
.site-header__cta { flex: 0 0 auto; }
.site-header__lang-mobile { display: none; }

.main-nav__list {
  display: flex;
  gap: var(--sp-1);
  margin: 0;
  padding: 0;
  list-style: none;
}
.main-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  padding: 0 var(--sp-3);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.main-nav__link:hover { background: var(--color-surface-2); color: var(--color-text-strong); }
.main-nav__link[aria-current="page"] { color: var(--color-text-strong); box-shadow: inset 0 -2px 0 var(--color-accent); border-radius: 0; }

/* burger */
.burger {
  display: none;
  position: relative;
  width: var(--tap);
  height: var(--tap);
  margin-left: var(--sp-2);
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}
.burger__lines,
.burger__lines::before,
.burger__lines::after {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  margin-left: -10px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast);
  content: "";
}
.burger__lines { top: 50%; margin-top: -1px; }
.burger__lines::before { top: -6px; left: 0; margin-left: 0; }
.burger__lines::after { top: 6px; left: 0; margin-left: 0; }
.burger[aria-expanded="true"] .burger__lines { background: transparent; }
.burger[aria-expanded="true"] .burger__lines::before { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] .burger__lines::after { transform: translateY(-6px) rotate(-45deg); }

/* tablet portrait and smaller: burger menu */
@media (max-width: 1023px) {
  .burger { display: inline-block; order: 4; margin-left: 0; }
  .site-header__lang-mobile { display: block; margin-left: auto; order: 2; }
  .site-header__cta { order: 3; }
  .site-header__panel {
    position: fixed;
    inset: calc(var(--header-h) + env(safe-area-inset-top)) 0 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-5);
    margin: 0;
    padding: var(--sp-6) max(var(--gutter), env(safe-area-inset-right)) calc(var(--sp-7) + env(safe-area-inset-bottom)) max(var(--gutter), env(safe-area-inset-left));
    background: var(--color-bg);
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  }
  .site-header.is-open .site-header__panel {
    visibility: visible;
    opacity: 1;
    transform: none;
    transition-delay: 0s;
  }
  .main-nav__list { flex-direction: column; gap: 0; }
  .main-nav__link {
    width: 100%;
    min-height: 56px;
    padding: 0 var(--sp-2);
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
  }
  .main-nav__link[aria-current="page"] { box-shadow: inset 3px 0 0 var(--color-accent); padding-left: var(--sp-4); }
  .site-header__panel .lang-switch { display: none; }
  .site-header__panel { overscroll-behavior: contain; }
}

/* phones: compact «Sign up» in the bar, not stretched */
@media (max-width: 767px) {
  .site-header__cta { min-height: 44px; padding: 0 var(--sp-3); font-size: .875rem; white-space: nowrap; }
}

/* very narrow phones (320–359px): logo + EN/BG/RU (44×44) + burger must fit one row */
@media (max-width: 359px) {
  .site-header__bar { gap: var(--sp-2); }
  .site-header__logo img { height: 36px; }
  .lang-switch--compact ul { gap: var(--sp-1); padding: 0; border: 0; background: none; }
}

/* ---------- footer ---------- */
.site-footer {
  margin-top: var(--section-y);
  padding: var(--sp-8) 0 calc(var(--sp-5) + env(safe-area-inset-bottom));
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}
.site-footer__grid {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1fr;
}
.site-footer__brand img { height: 64px; width: auto; }
.site-footer__title {
  margin-bottom: var(--sp-3);
  font-size: 1rem;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.site-footer__map { display: inline-flex; min-height: var(--tap); align-items: center; }
.site-footer__bottom {
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-small);
}
.site-footer__bottom p { margin: 0; }

@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr 1fr; align-items: start; }
}

/* ---------- grids ---------- */
.grid { display: grid; gap: var(--sp-5); grid-template-columns: 1fr; }
@media (min-width: 480px) and (max-width: 767px) and (orientation: landscape) { .grid--2, .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid--3, .grid--4 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1280px) { .grid--4 { grid-template-columns: repeat(4, 1fr); } }

/* ---------- phone landscape / low screens ---------- */
@media (orientation: landscape) and (max-height: 500px) {
  :root { --header-h: 56px; --section-y: 40px; }
  html { scroll-padding-top: 8px; }
  .site-header { position: relative; }
  .site-header.is-open { position: sticky; } /* open menu: header returns to the top, panel has no gap */
  .site-header__logo img { height: 40px; }
}