/* Quality/accessibility: one global header based on the HSK Test Center. */

:root {
  --test-nav-ink: #17352e;
  --test-nav-green: #2f6a55;
  --test-nav-green-dark: #1f4e3e;
  --test-nav-line: #23483c;
  --test-nav-soft: #edf5f0;
  --test-nav-surface: rgba(255, 255, 255, 0.97);
  --test-nav-shadow: 6px 6px 0 rgba(35, 72, 60, 0.18);
}

/* Shared site-shell header used by Grammar, Culture, Practice, Tests and tools. */
body.prototype-v2.multipage-site [data-site-header] {
  display: block;
  min-height: 96px;
  padding-top: 16px;
  background: transparent;
}

body.prototype-v2.multipage-site .site-header {
  top: 12px;
  right: auto;
  left: 50%;
  width: min(1120px, calc(100% - 64px));
  overflow: visible;
  border: 2px solid var(--test-nav-line);
  border-radius: 20px;
  color: var(--test-nav-ink);
  background: var(--test-nav-surface);
  box-shadow: var(--test-nav-shadow);
  transform: translateX(-50%);
  backdrop-filter: blur(18px);
}

body.prototype-v2.multipage-site .site-header.is-scrolled {
  border-color: var(--test-nav-line);
  background: var(--test-nav-surface);
  box-shadow: var(--test-nav-shadow);
}

body.prototype-v2.multipage-site .site-header .nav-wrap {
  min-height: 68px;
}

body.prototype-v2.multipage-site .site-header .brand,
body.prototype-v2.multipage-site .site-header .desktop-nav .desktop-nav__primary,
body.prototype-v2.multipage-site .site-header .desktop-nav__item--practice .nav-level-trigger {
  color: var(--test-nav-ink);
}

body.prototype-v2.multipage-site .site-header .desktop-nav a[aria-current="page"] {
  color: var(--test-nav-green);
}

body.prototype-v2.multipage-site .site-header .desktop-nav a::after {
  background: currentColor;
}

body[data-page].prototype-v2.multipage-site .site-header .button,
body[data-page].prototype-v2.multipage-site .site-header .button--dark,
body[data-page].prototype-v2.multipage-site .site-header .button--brand {
  min-height: 44px;
  padding-inline: 21px;
  border: 2px solid var(--test-nav-line);
  border-radius: 12px;
  color: #fff;
  background: var(--test-nav-green);
  box-shadow: 3px 3px 0 var(--test-nav-line);
}

body[data-page].prototype-v2.multipage-site .site-header .button:hover,
body[data-page].prototype-v2.multipage-site .site-header .button:focus-visible,
body[data-page].prototype-v2.multipage-site .site-header .button--dark:hover,
body[data-page].prototype-v2.multipage-site .site-header .button--dark:focus-visible,
body[data-page].prototype-v2.multipage-site .site-header .button--brand:hover,
body[data-page].prototype-v2.multipage-site .site-header .button--brand:focus-visible {
  color: #fff;
  background: var(--test-nav-green-dark);
  box-shadow: 1px 1px 0 var(--test-nav-line);
  transform: translate(2px, 2px);
}

body.prototype-v2.multipage-site .site-header .mobile-menu-button {
  border: 2px solid var(--test-nav-line);
  border-radius: 12px;
  background: #fff;
}

body.prototype-v2.multipage-site .site-header .mobile-menu-button span {
  background: var(--test-nav-ink);
}

/* Homepage header keeps its behavior while matching the Test Center card. */
body[data-page="home"].home-modern .modern-header {
  top: 12px;
  right: auto;
  left: 50%;
  width: min(1120px, calc(100% - 64px));
  overflow: visible;
  border: 2px solid var(--test-nav-line);
  border-radius: 20px;
  color: var(--test-nav-ink);
  background: var(--test-nav-surface);
  box-shadow: var(--test-nav-shadow);
  transform: translateX(-50%);
}

body[data-page="home"].home-modern .modern-header.is-scrolled {
  box-shadow: var(--test-nav-shadow);
}

body.home-modern .modern-header__inner {
  min-height: 68px;
}

body[data-page="home"].home-modern .modern-header .modern-logo,
body[data-page="home"].home-modern .modern-header .modern-nav a,
body[data-page="home"].home-modern .modern-header .modern-practice-trigger {
  color: var(--test-nav-ink);
}

body.home-modern .modern-logo img {
  width: 34px;
  height: 34px;
  flex-basis: 34px;
}

body[data-page="home"].home-modern .modern-header .modern-button--small {
  min-height: 44px;
  padding-inline: 21px;
  border: 2px solid var(--test-nav-line);
  border-radius: 12px;
  color: #fff;
  background: var(--test-nav-green);
  box-shadow: 3px 3px 0 var(--test-nav-line);
}

body[data-page="home"].home-modern .modern-header .modern-button--small:hover,
body[data-page="home"].home-modern .modern-header .modern-button--small:focus-visible {
  color: #fff;
  background: var(--test-nav-green-dark);
  box-shadow: 1px 1px 0 var(--test-nav-line);
  transform: translate(2px, 2px);
}

body.home-modern .modern-menu {
  border: 2px solid var(--test-nav-line);
  border-radius: 12px;
  color: var(--test-nav-ink);
  background: #fff;
}

body.home-modern main {
  padding-top: 96px;
}

/* Vocabulary has legacy class names but now uses the same Test Center frame. */
body.vocabulary-modern .vocab-header {
  top: 12px;
  right: auto;
  left: 50%;
  width: min(1120px, calc(100% - 64px));
  overflow: visible;
  border: 2px solid var(--test-nav-line);
  border-radius: 20px;
  color: var(--test-nav-ink);
  background: var(--test-nav-surface);
  box-shadow: var(--test-nav-shadow);
  transform: translateX(-50%);
}

body.vocabulary-modern .vocab-header.is-scrolled {
  border-color: var(--test-nav-line);
  box-shadow: var(--test-nav-shadow);
}

body.vocabulary-modern .vocab-header__inner {
  min-height: 68px;
}

body.vocabulary-modern .vocab-logo,
body.vocabulary-modern .vocab-header__nav > a,
body.vocabulary-modern .vocab-more > a,
body.vocabulary-modern .vocab-more > button {
  color: var(--test-nav-ink);
}

body.vocabulary-modern .vocab-header__nav > a::after,
body.vocabulary-modern .vocab-more > a::after {
  height: 1px;
  background: currentColor;
}

body.vocabulary-modern .vocab-header__nav > a[aria-current="page"] {
  color: var(--test-nav-green);
}

body.vocabulary-modern .vocab-button--header {
  min-height: 44px;
  padding-inline: 21px;
  border: 2px solid var(--test-nav-line);
  border-radius: 12px;
  color: #fff !important;
  background: var(--test-nav-green);
  box-shadow: 3px 3px 0 var(--test-nav-line);
}

body.vocabulary-modern .vocab-button--header:hover,
body.vocabulary-modern .vocab-button--header:focus-visible {
  background: var(--test-nav-green-dark);
  box-shadow: 1px 1px 0 var(--test-nav-line);
  transform: translate(2px, 2px);
}

body.vocabulary-modern .vocab-menu {
  border: 2px solid var(--test-nav-line);
  border-radius: 12px;
  background: #fff;
}

body.vocabulary-modern.multipage-site[data-page="vocabulary"] main {
  padding-top: 96px;
}

body.vocabulary-modern .vocab-level-dock {
  top: 96px;
}

/* Keep every desktop module label on the same coordinates. Active state never changes text width. */
@media (min-width: 1041px) {
  body.prototype-v2.multipage-site .site-header .nav-wrap,
  body[data-page="home"].home-modern .modern-header__inner,
  body[data-page="vocabulary"].vocabulary-modern .vocab-header__inner {
    grid-template-columns: 200px minmax(0, 1fr) auto;
    gap: 0;
  }

  body.prototype-v2.multipage-site .site-header .desktop-nav,
  body[data-page="home"].home-modern .modern-header .modern-nav,
  body[data-page="vocabulary"].vocabulary-modern .vocab-header__nav {
    align-items: center;
    gap: 22px;
    margin: 0;
  }

  body.prototype-v2.multipage-site .site-header .desktop-nav > .desktop-nav__primary,
  body.prototype-v2.multipage-site .site-header .desktop-nav__item > .desktop-nav__primary,
  body[data-page="home"].home-modern .modern-header .modern-nav > a,
  body[data-page="home"].home-modern .modern-header .modern-practice-nav > a,
  body[data-page="vocabulary"].vocabulary-modern .vocab-header__nav > a,
  body[data-page="vocabulary"].vocabulary-modern .vocab-more > a {
    display: flex;
    min-height: 40px;
    align-items: center;
    padding: 10px 0;
    font-family: Inter, ui-sans-serif, -apple-system, system-ui, "SF Pro Display", "Segoe UI", sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: normal;
    white-space: nowrap;
  }

  body.prototype-v2.multipage-site .site-header .desktop-nav a[aria-current="page"],
  body[data-page="home"].home-modern .modern-header .modern-nav a[aria-current="page"],
  body[data-page="vocabulary"].vocabulary-modern .vocab-header__nav a[aria-current="page"] {
    font-weight: 600;
  }

  body.prototype-v2.multipage-site .site-header .desktop-nav__item--practice,
  body[data-page="home"].home-modern .modern-header .modern-practice-nav,
  body[data-page="vocabulary"].vocabulary-modern .vocab-more {
    gap: 5px;
  }

  body.prototype-v2.multipage-site .site-header .desktop-nav__item--practice .nav-level-trigger,
  body[data-page="home"].home-modern .modern-header .modern-practice-trigger,
  body[data-page="vocabulary"].vocabulary-modern .vocab-more > button {
    display: grid;
    width: 30px;
    height: 38px;
    min-height: 38px;
    place-items: center;
    margin-left: -4px;
    padding: 0;
  }
}

/* Vocabulary switches to the shared mobile navigation breakpoint. */
@media (min-width: 901px) and (max-width: 1040px) {
  body[data-page="vocabulary"].vocabulary-modern .vocab-header__inner {
    grid-template-columns: 1fr auto;
  }

  body[data-page="vocabulary"].vocabulary-modern .vocab-header__nav,
  body[data-page="vocabulary"].vocabulary-modern .vocab-header__actions > .vocab-button {
    display: none;
  }

  body[data-page="vocabulary"].vocabulary-modern .vocab-header__actions {
    gap: 0;
  }

  body[data-page="vocabulary"].vocabulary-modern .vocab-menu {
    display: grid;
    width: 48px;
    height: 48px;
    place-content: center;
    gap: 5px;
    padding: 0;
  }

  body[data-page="vocabulary"].vocabulary-modern .vocab-mobile-nav {
    width: calc(100% - 72px);
    max-height: calc(100vh - 74px);
    margin: 0 auto;
    overflow-y: auto;
    padding: 12px 0 24px;
    border-top: 1px solid #d7dfda;
    color: var(--test-nav-ink);
    background: #fff;
  }

  body[data-page="vocabulary"].vocabulary-modern .vocab-mobile-nav:not([hidden]) {
    display: grid;
  }
}

@media (max-width: 760px) {
  body.prototype-v2.multipage-site [data-site-header] {
    min-height: 74px;
    padding-top: 0;
  }

  body.prototype-v2.multipage-site .site-header,
  body[data-page="home"].home-modern .modern-header,
  body.vocabulary-modern .vocab-header {
    top: 0;
    right: 0;
    left: 0;
    width: 100%;
    border-width: 0 0 1px;
    border-radius: 0;
    box-shadow: none;
    transform: none;
  }

  body.prototype-v2.multipage-site .site-header.is-scrolled,
  body[data-page="home"].home-modern .modern-header.is-scrolled,
  body.vocabulary-modern .vocab-header.is-scrolled {
    box-shadow: 0 8px 24px rgba(23, 53, 46, 0.08);
  }

  body.prototype-v2.multipage-site .site-header .nav-wrap,
  body.home-modern .modern-header__inner,
  body.vocabulary-modern .vocab-header__inner {
    min-height: 74px;
  }

  body.home-modern main,
  body.vocabulary-modern.multipage-site[data-page="vocabulary"] main {
    padding-top: 74px;
  }

  body.vocabulary-modern .vocab-level-dock {
    top: 74px;
  }

  body.home-modern .modern-mobile-nav,
  body.vocabulary-modern .vocab-mobile-nav {
    width: calc(100% - 32px);
    max-height: calc(100vh - 74px);
    margin: 0 auto;
    overflow-y: auto;
    padding: 12px 0 24px;
    border-top: 1px solid #d7dfda;
    color: var(--test-nav-ink);
    background: #fff;
  }

  body.home-modern .modern-mobile-nav > a:not(.modern-button),
  body.vocabulary-modern .vocab-mobile-nav > a:not(.vocab-button) {
    min-height: 50px;
    padding: 14px 0;
    border-bottom: 1px solid #d7dfda;
    color: var(--test-nav-ink);
    font-size: 16px;
    font-weight: 620;
  }

  body.home-modern .modern-mobile-nav > a[aria-current="page"],
  body.vocabulary-modern .vocab-mobile-nav > a[aria-current="page"] {
    color: var(--test-nav-green);
  }

  body.home-modern .modern-mobile-nav .modern-button,
  body.vocabulary-modern .vocab-mobile-nav .vocab-button {
    min-height: 48px;
    border: 2px solid var(--test-nav-line);
    border-radius: 12px;
    color: #fff;
    background: var(--test-nav-green);
    box-shadow: 3px 3px 0 var(--test-nav-line);
  }
}

@media (max-width: 640px) {
  body.home-modern .modern-header__inner,
  body.vocabulary-modern .vocab-header__inner {
    width: calc(100% - 32px);
  }
}

@media (prefers-reduced-motion: reduce) {
  body.prototype-v2.multipage-site .site-header *,
  body.home-modern .modern-header *,
  body.vocabulary-modern .vocab-header * {
    scroll-behavior: auto;
    transition: none !important;
  }
}