/* Shared layout: header, footer */

:root {
  --site-header-height: 74px;
  --site-header-height-compact: 56px;
  --site-header-offset: var(--site-header-height);
  --site-nav-bp: 1100px;
}

html.is-header-compact {
  --site-header-offset: var(--site-header-height-compact);
}

/* Якорные разделы не прячутся под закреплённой шапкой */
#requests,
#approaches,
#tests,
#club,
#schedule,
main .section[id],
main section[id] {
  scroll-margin-top: calc(var(--site-header-offset) + 16px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(252, 253, 250, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: var(--stroke-hair) solid var(--border-subtle);
}

.site-header__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: var(--site-header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  transition: height var(--dur-base) var(--ease-standard);
}

.site-header.is-scrolled .site-header__inner {
  height: var(--site-header-height-compact);
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  margin-right: var(--space-xs);
}

.site-header__logo img {
  height: 30px;
  width: auto;
  display: block;
  transition: height var(--dur-base) var(--ease-standard);
}

.site-header.is-scrolled .site-header__logo img {
  height: 24px;
}

.site-header__nav--desktop {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 28px;
  flex: 1 1 auto;
  min-width: 0;
  justify-content: flex-start;
  margin-left: 40px;
  overflow: visible;
}

.site-header__link {
  text-decoration: none;
  font-size: 16.5px;
  font-weight: var(--fw-regular);
  color: var(--ppch-grey-700);
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--dur-fast) var(--ease-standard);
}

button.site-header__link {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
  text-align: left;
}

.site-header__link:hover,
.site-header__link.is-active {
  color: var(--ppch-turquoise);
  text-decoration: none;
}

.site-header__link.is-active {
  font-weight: var(--fw-medium);
}

.site-header__more {
  font-size: 17px;
  font-weight: var(--fw-regular);
  color: var(--ppch-grey-500);
  cursor: default;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  margin-left: auto;
}

.site-header__cta {
  flex-shrink: 0;
  white-space: nowrap;
  text-decoration: none;
}

.site-header__cta--bar {
  box-shadow: var(--shadow-sm);
}

.site-header__cta:hover {
  text-decoration: none;
}

.site-header__cta--drawer,
.site-menu__help {
  display: none;
}

.site-header__burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: var(--stroke-hair) solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--surface-card, #fcfdf9);
  color: var(--ppch-deep);
  cursor: pointer;
  transition:
    border-color var(--dur-fast) var(--ease-standard),
    background var(--dur-fast) var(--ease-standard);
}

.site-header__burger:hover {
  border-color: var(--ppch-deep);
}

.site-header__burger-icon,
.site-header__burger-icon::before,
.site-header__burger-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition:
    transform var(--dur-base) var(--ease-standard),
    opacity var(--dur-fast) var(--ease-standard);
}

.site-header__burger-icon {
  position: relative;
}

.site-header__burger-icon::before,
.site-header__burger-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.site-header__burger-icon::before {
  top: -6px;
}

.site-header__burger-icon::after {
  top: 6px;
}

.site-header.is-menu-open .site-header__burger-icon {
  background: transparent;
}

.site-header.is-menu-open .site-header__burger-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header.is-menu-open .site-header__burger-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Mobile drawer (outside header — avoids backdrop-filter clipping) */
.site-menu__backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(27, 43, 45, 0.45);
}

.site-menu__backdrop.is-visible {
  display: block;
}

.site-menu__drawer {
  display: none;
}

/* Промежуточные ширины: уплотняем меню, не переносим пункты */
@media (max-width: 1280px) and (min-width: 1101px) {
  .site-header__inner {
    padding: 0 var(--space-md);
    gap: var(--space-sm);
  }

  .site-header__nav--desktop {
    gap: 18px;
    margin-left: 20px;
  }

  .site-header__link {
    font-size: 15px;
  }

  .site-header__cta--bar {
    padding-inline: 14px;
    font-size: 14px;
  }
}

@media (max-width: 1100px) {
  :root {
    --site-header-height: 64px;
    --site-header-height-compact: 56px;
  }

  .site-header__inner {
    padding: 0 var(--space-md);
    height: var(--site-header-height);
  }

  .site-header.is-scrolled .site-header__inner {
    height: var(--site-header-height-compact);
  }

  .site-header__nav--desktop {
    display: none;
  }

  /* На мобиле в шапке только логотип и бургер */
  .btn.site-header__cta--bar {
    display: none;
  }

  .site-header__burger {
    display: inline-flex;
    position: relative;
    z-index: 82;
  }

  .site-header.is-menu-open {
    z-index: 81;
  }

  .site-menu__backdrop {
    display: none;
  }

  .site-menu__backdrop.is-visible {
    display: block;
  }

  .site-menu__drawer {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 80;
    width: 100%;
    max-width: none;
    padding:
      calc(var(--site-header-height) + var(--space-md) + env(safe-area-inset-top, 0px))
      var(--space-lg)
      calc(var(--space-xl) + env(safe-area-inset-bottom, 0px));
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    background: var(--surface-card, #fcfdf9);
    border-right: none;
    box-shadow: none;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      opacity var(--dur-base) var(--ease-out),
      transform var(--dur-base) var(--ease-out),
      visibility 0s linear var(--dur-base);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .site-header.is-menu-open + .site-menu .site-menu__drawer {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition:
      opacity var(--dur-base) var(--ease-out),
      transform var(--dur-base) var(--ease-out),
      visibility 0s;
  }

  .site-menu__nav {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .site-menu__drawer .site-header__link {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 12px 0;
    font-size: 18px;
    border-bottom: var(--stroke-hair) solid var(--border-subtle);
    white-space: normal;
  }

  .site-menu__help {
    display: block;
    margin-top: auto;
    padding-top: var(--space-lg);
    border-top: var(--stroke-hair) solid var(--border-subtle);
  }

  .site-menu__help-label {
    display: block;
    margin-bottom: 10px;
    font-size: 13px;
    font-weight: var(--fw-medium);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-tertiary);
  }

  .btn.site-header__cta--drawer,
  .site-menu__help .site-header__cta--drawer {
    display: inline-flex;
    width: 100%;
    min-height: 48px;
    justify-content: center;
    align-items: center;
  }
}

@media (min-width: 1101px) {
  .site-menu {
    display: none;
  }
}