/* Шапка: липкая навигация, бургер, мобильное меню */

/* ——— навигация ——— */
.nav {
  position: sticky;
  top: env(safe-area-inset-top,0px);
  z-index: 60;
  height: 76px;
  margin-bottom: -76px;
  border-bottom: 1px solid transparent;
  transition: background .45s,border-color .45s;
}

.nav[data-scrolled],
.nav[data-open] {
  background: rgba(6,6,9,.78);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--line);
}

.nav-in {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  color: var(--ink2);
}

.brand-w {
  font: 600 15px/1 var(--f-disp);
  letter-spacing: .28em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  position: relative;
  color: #B7BBC3;
  text-decoration: none;
  font-size: 14px;
  padding: 6px 0;
  transition: color .25s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  border-radius: 50%;
  background: var(--accent);
  transform: scale(0);
  transition: transform .3s var(--ease);
}

.nav-link:hover {
  color: #FFF;
}

.nav-link:hover::after {
  transform: scale(1);
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 18px 0 16px;
  border-radius: 999px;
  color: #F1F2F4;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  background: linear-gradient(#0B0C0F,#0B0C0F) padding-box,
    linear-gradient(135deg,rgba(255,255,255,.75),rgba(255,255,255,.12) 38%,rgba(255,255,255,.5) 68%,rgba(255,255,255,.1)) border-box;
  transition: transform .3s var(--ease);
}

.btn-nav:hover {
  transform: translateY(-1px);
}

.burger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line2);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  place-items: center;
}

.burger span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  position: relative;
  transition: transform .35s var(--ease);
}

.burger span::before,
.burger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform .35s var(--ease);
}

.burger span::before {
  top: -5px;
}

.burger span::after {
  top: 5px;
}

.nav[data-open] .burger span {
  background: transparent;
}

.nav[data-open] .burger span::before {
  transform: translateY(5px) rotate(45deg);
}

.nav[data-open] .burger span::after {
  transform: translateY(-5px) rotate(-45deg);
}

.mnav {
  display: none;
}

@media (max-width:960px) {
  .nav-links,
  .nav .btn-nav {
    display: none;
  }
  .burger {
    display: grid;
  }
  .mnav {
    position: fixed;
    inset: calc(76px + env(safe-area-inset-top,0px)) 0 auto 0;
    z-index: 59;
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: calc(100vh - 76px - env(safe-area-inset-top,0px));
    max-height: calc(100dvh - 76px - env(safe-area-inset-top,0px));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 18px var(--gut) 26px;
    background: rgba(6,6,9,.96);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transform: translate3d(0,-12px,0);
    opacity: 0;
    visibility: hidden;
    transition: transform .45s var(--ease),opacity .35s,visibility 0s .45s;
  }
  .nav[data-open] + .mnav {
    transform: none;
    opacity: 1;
    visibility: visible;
    transition: transform .45s var(--ease),opacity .35s,visibility 0s;
  }
  .mnav a {
    font: 500 26px/1.2 var(--f-disp);
    padding: 10px 0;
    color: var(--ink2);
    text-decoration: none;
    border-bottom: 1px solid var(--line);
  }
  .mnav .btn-o {
    margin-top: 18px;
    font-family: var(--f-body);
    color: #0A0A0C;
    border-bottom: 0;
    flex-shrink: 0;
  }
}

@media (max-width:960px) and (max-height:500px) {
  /* телефон в альбомной ориентации: меню в две колонки, чтобы целиком влезало в экран */
  .mnav {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    column-gap: 28px;
    row-gap: 0;
    padding-top: 8px;
    padding-bottom: 16px;
  }
  .mnav a {
    font-size: 20px;
    padding: 8px 0;
  }
  .mnav .btn-o {
    grid-column: 1/-1;
    margin-top: 12px;
    height: 50px;
    font-size: 17px;
  }
}