/*
 * Site header (src/components/SiteNav.astro): one navigation for every breakpoint, replacing
 * the former desktop bar (.nav-bar) and mobile menu (.navigation / .centered-nav).
 * Desktop: one black bar across the full viewport width, fixed to the top, divided by lines
 * instead of boxes: the logo cell (line on its right), the links centred in the free space,
 * then the Influence Day cell (line on its left) and Join the list as a flush yellow cell.
 * A line runs along the bar's bottom edge.
 * Tablet and down: the same bar holds the logo, Join the list and the menu button (lines between
 * them); the menu (links, Tickets, Influence Day) opens below it, full width. The open state is
 * [data-navigation-status="active"] on .site-nav, set by src/scripts/site/navigation.js.
 * Lines use the site's line tokens (--line-width, --line-color: public/css/atn-system.css).
 */

.site-nav {
  z-index: 1500;
  width: 100%;
  padding: 0;
  display: block;
  position: fixed;
  top: 0;
  left: 0;
}

.site-nav__overlay {
  display: none;
}

.site-nav__bar {
  --nav-line: var(--line-width) solid var(--line-color);
  background-color: var(--black);
  border-bottom: var(--nav-line);
  align-items: stretch;
  width: 100%;
  height: 6.4em;
  display: flex;
  position: relative;
}

.site-nav__logo {
  border-right: var(--nav-line);
  flex: none;
  align-items: center;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  text-decoration: none;
  display: flex;
}

.site-nav__logo-img {
  width: 7.6em;
}

.site-nav__menu,
.site-nav__menu-inner {
  flex: 1;
  display: flex;
}

/* The links sit in the exact centre of the bar (not of the space between logo and buttons). */
.site-nav__list {
  justify-content: center;
  align-items: stretch;
  height: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.site-nav__item {
  flex: none;
  margin: 0;
  padding: 0;
}

.site-nav__divider,
.site-nav__arrow,
.site-nav__tickets,
.site-nav__toggle {
  display: none;
}

.btn-animate-chars.site-nav__link {
  background-color: #0000;
  border-radius: 0;
  width: 100%;
  height: 100%;
  padding-left: 1.4em;
  padding-right: 1.4em;
}

.site-nav__link-text {
  z-index: 2;
  color: var(--white);
  white-space: nowrap;
  font-size: 1.352em;
  font-weight: var(--font-label-weight);
  line-height: 1.3;
  position: relative;
}

.site-nav__actions {
  flex: none;
  margin-left: auto;
  display: flex;
}

.btn-animate-chars.site-nav__influence,
.btn-animate-chars.site-nav__join {
  grid-column-gap: .6em;
  grid-row-gap: .6em;
  background-color: #0000;
  border-style: none;
  border-radius: 0;
  flex: none;
  height: 100%;
  padding-left: 3em;
  padding-right: 3em;
}

/* Influence Day: a plain cell with a line on its left; it shades on hover. */
.btn-animate-chars.site-nav__influence {
  border-left: var(--nav-line);
}

.site-nav__btn-bg {
  border-color: var(--yellow);
  background-color: var(--yellow);
  border-radius: 0;
}

.site-nav__btn-bg.is-influence {
  border-color: #0000;
  background-color: #0000;
  transition: inset 0.6s cubic-bezier(0.625, 0.05, 0, 1), background-color 0.3s ease;
}

.site-nav__influence:hover .site-nav__btn-bg.is-influence {
  background-color: var(--darker-3);
}

.site-nav__btn-icon {
  z-index: 2;
  height: 1.7em;
  position: relative;
}

.site-nav__btn-text {
  z-index: 2;
  color: var(--black);
  white-space: nowrap;
  font-size: 1.352em;
  font-weight: var(--font-label-weight);
  line-height: 1.3;
  position: relative;
}

.site-nav__btn-text.is-white {
  color: var(--white);
}

/* A black icon shown on a dark segment */
.site-nav__btn-icon.is-light {
  filter: invert(1);
}

.site-nav__toggle-bar {
  background-color: #131313;
  width: 1.875em;
  height: .125em;
  position: absolute;
}

@media screen and (max-width: 991px) {
  .site-nav {
    z-index: 500;
    pointer-events: none;
    width: auto;
    padding: 0;
    display: block;
    inset: 0;
  }

  .site-nav__overlay {
    opacity: 0;
    pointer-events: auto;
    visibility: hidden;
    background-color: #000;
    display: block;
    position: absolute;
    inset: 0;
  }

  /* Row 1: logo, Join the list and menu button cells. Row 2: the menu, full width below them. */
  .site-nav__bar {
    grid-row-gap: 0;
    pointer-events: auto;
    grid-template-rows: 4.6em auto;
    grid-template-columns: 1fr auto auto;
    align-items: stretch;
    width: auto;
    max-width: none;
    height: auto;
    display: grid;
    position: absolute;
    inset: 0 0 auto;
  }

  .site-nav__logo,
  .site-nav__join,
  .site-nav__toggle {
    pointer-events: auto;
  }

  .site-nav__logo {
    color: #131313;
    border-right-style: none;
    justify-content: flex-start;
    align-items: center;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }

  .site-nav__logo.w--current {
    font-size: .8em;
  }

  .site-nav__logo-img {
    width: 8.2em;
  }

  .site-nav__menu {
    grid-template-rows: 0fr;
    grid-row: 2;
    grid-column: 1 / -1;
    display: grid;
    position: relative;
    overflow: hidden;
  }

  .site-nav__menu-inner {
    grid-column-gap: 3em;
    grid-row-gap: 3em;
    pointer-events: auto;
    flex-flow: column;
    justify-content: flex-start;
    align-items: center;
    width: 100%;
    background-color: var(--black);
    /* The line under the top row, drawn as a shadow so the closed menu takes no height at all. */
    box-shadow: inset 0 var(--line-width) 0 0 var(--line-color);
    border-radius: 0;
    height: 10000%;
    margin-top: 0;
    font-size: .7em;
    display: flex;
    position: relative;
    overflow: hidden;
  }

  .site-nav__list {
    grid-column-gap: 3em;
    grid-row-gap: 3em;
    flex: none;
    flex-flow: column;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
    height: auto;
    padding: 4em 9.5em 0;
    position: relative;
    top: auto;
    left: auto;
    transform: none;
  }

  .site-nav__item {
    flex: none;
    color: var(--black);
    width: 100%;
    padding-left: .2em;
    padding-right: .2em;
    overflow: clip;
  }

  .site-nav__divider {
    background-color: var(--line-color);
    width: 100%;
    height: .1em;
    display: block;
  }

  .btn-animate-chars.site-nav__link {
    grid-column-gap: 0;
    grid-row-gap: 0;
    color: #131313;
    background-color: #0000;
    border-radius: 0;
    flex-grow: 0;
    justify-content: space-between;
    width: 100%;
    height: auto;
    padding: 0;
  }

  .btn-animate-chars.site-nav__link.w--current {
    color: #0000;
  }

  .site-nav__link-text {
    z-index: auto;
    color: var(--lighter-3);
    font-size: 4.16em;
    font-weight: var(--font-label-weight);
    line-height: 1;
  }

  .site-nav__arrow {
    width: 2em;
    display: inline-block;
    transform: rotate(45deg);
  }

  .site-nav__actions {
    grid-column-gap: 2em;
    grid-row-gap: 2em;
    flex: none;
    flex-flow: column;
    width: 100%;
    margin-top: 3em;
    padding: 0 9.5em 6em;
  }

  .site-nav__tickets,
  .btn-animate-chars.site-nav__influence {
    grid-column-gap: .5em;
    grid-row-gap: .5em;
    color: var(--white);
    border-radius: .171em;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 9em;
    padding: 0;
    text-decoration: none;
    display: flex;
  }

  .site-nav__tickets,
  .btn-animate-chars.site-nav__influence {
    flex: none;
    border: 1px solid var(--lighter-1);
    border-radius: 0;
    background-color: #0000;
  }

  .site-nav__btn-bg {
    display: none;
  }

  .site-nav__btn-icon {
    width: 3em;
    height: auto;
  }

  .site-nav__btn-text {
    font-size: 1.664em;
    line-height: 100%;
  }

  .btn-animate-chars.site-nav__join {
    grid-column-gap: .4em;
    grid-row-gap: .4em;
    background-color: var(--yellow);
    color: var(--black);
    border-radius: 0;
    grid-column: 2;
    width: 19em;
    height: auto;
    padding: 0;
    font-size: .7em;
  }

  .btn-animate-chars.site-nav__join.is-hidden-tablet {
    display: none;
  }

  /* Without Talks, the logo segment takes its column so the gaps stay even. */
  .site-nav__logo.is-wide-tablet {
    grid-column: 1 / span 2;
  }

  .site-nav__btn-text.is-join {
    letter-spacing: normal;
    font-size: 1.664em;
    line-height: 1;
  }

  .site-nav__toggle {
    cursor: pointer;
    background-color: #0000;
    border-style: none;
    border-left: var(--nav-line);
    border-radius: 0;
    justify-content: center;
    align-items: center;
    grid-column: 3;
    width: 6.571em;
    height: auto;
    padding: 0;
    font-size: .7em;
    display: flex;
    position: relative;
  }

  .site-nav__toggle-bar {
    background-color: var(--white);
    width: 50%;
    height: .2em;
  }
}

@media screen and (max-width: 767px) {
  .site-nav__list,
  .site-nav__actions {
    padding-left: 5.5em;
    padding-right: 5.5em;
  }

}

@media screen and (max-width: 479px) {
  .site-nav {
    inset: 0% 0% auto;
  }

  .site-nav__bar {
    grid-template-rows: 5em auto;
  }

  .site-nav__menu {
    margin-left: 0;
    margin-right: 0;
  }

  .site-nav__logo {
    padding-left: var(--gutter);
  }

  .site-nav__menu-inner {
    font-size: .65em;
  }

  /* Menu button labels match Join the list in the bar (1.1em of the bar's size). */
  .site-nav__btn-text {
    font-size: 1.924em;
  }

  .site-nav__list {
    padding-top: 2em;
  }

  .btn-animate-chars.site-nav__join {
    width: 14.5em;
    font-size: 1em;
  }

  .site-nav__btn-text.is-join {
    font-size: 1.248em;
  }

  .site-nav__toggle {
    width: 5em;
    font-size: 1em;
  }
}

/* ==== Menu animation (custom code, Osmo "centered scaling navigation") ==== */
@media screen and (max-width: 991px) {
  /* Dark page overlay */
  .site-nav__overlay {
    transition: all 0.7s cubic-bezier(0.5, 0.5, 0, 1);
  }
  [data-navigation-status="active"] .site-nav__overlay {
    opacity: 0.15;
    visibility: visible;
  }
  /* Open/close the menu */
  .site-nav__menu {
    transition: grid-template-rows 0.6s cubic-bezier(0.625, 0.05, 0, 1);
  }
  [data-navigation-status="active"] .site-nav__menu {
    grid-template-rows: 1fr;
  }
  /* Menu items fade and rise in */
  [data-navigation-item] {
    transition: all 0.6s cubic-bezier(0.625, 0.05, 0, 1);
    opacity: 0;
    transform: translate(0px, 2em);
  }
  [data-navigation-status="active"] [data-navigation-item] {
    opacity: 1;
    transform: translate(0px, 0em);
  }
  /* Link underline */
  .site-nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    opacity: 0.2;
    transition-delay: inherit;
    transform: scaleX(0);
    transition: transform 0.6s cubic-bezier(.65, 0, 0, 1);
  }
  [data-navigation-status="active"] .site-nav__link::after {
    transform: scaleX(1);
  }
  .site-nav__link:hover::after {
    opacity: 0.4;
  }
  .site-nav__link[aria-current]::after {
    opacity: 1;
  }
  /* Link text slides up */
  .site-nav__link-text {
    transition: transform 0.6s cubic-bezier(.65, 0, 0, 1);
    transform: translate(0px, 150%);
    transition-delay: inherit;
  }
  [data-navigation-status="active"] .site-nav__link-text {
    transform: translate(0px, 0%);
  }
}

/* Menu button: two bars that cross when the menu is open */
.site-nav__toggle .site-nav__toggle-bar {
  transition: transform 0.6s cubic-bezier(.65, 0, 0, 1);
  transform: translateY(-0.25em) rotate(0.001deg);
}
.site-nav__toggle:hover .site-nav__toggle-bar {
  transform: translateY(0.25em) rotate(0.001deg);
}
.site-nav__toggle .site-nav__toggle-bar:nth-child(2) {
  transform: translateY(0.15em) rotate(0.001deg);
}
.site-nav__toggle:hover .site-nav__toggle-bar:nth-child(2) {
  transform: translateY(-0.15em) rotate(0.001deg);
}
[data-navigation-status="active"] .site-nav__toggle .site-nav__toggle-bar {
  transform: translateY(0em) rotate(45deg);
}
[data-navigation-status="active"] .site-nav__toggle .site-nav__toggle-bar:nth-child(2) {
  transform: translateY(0em) rotate(-45deg);
}