/* ==========================================================================
   Events index, Forty-Five theme: rooms full of people.
   Hero, the tally (a row of plus marks that turn to times and multiply on
   scroll), the rooms wall, upcoming and past on a dated timeline, speaking
   on paper. Tokens and primitives come from ../styles.css.
   ========================================================================== */

.nav-link[aria-current] {
  color: var(--paper);
  text-decoration: underline 1px;
  text-underline-offset: 0.55em;
}

/* The cross: two hairlines. Turned forty-five degrees it is the times sign. */
.events-cross {
  position: relative;
  display: block;
  width: var(--cross, 15px);
  height: var(--cross, 15px);
}
.events-cross::before,
.events-cross::after {
  content: "";
  position: absolute;
  background: currentColor;
}
.events-cross::before { left: 50%; top: 0; bottom: 0; width: 1px; margin-left: -0.5px; }
.events-cross::after { top: 50%; left: 0; right: 0; height: 1px; margin-top: -0.5px; }

/* Hero
   ========================================================================== */
.events-hero {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  grid-template-rows: auto 1fr;
  column-gap: clamp(2rem, 5vw, 6rem);
  min-height: 100vh;
  min-height: 100svh;
  padding: calc(var(--nav-height) + clamp(1.5rem, 3vw, 2.5rem)) var(--gutter) clamp(3rem, 6vw, 5rem);
}
.events-hero .section-head { grid-column: 1 / -1; margin-bottom: clamp(2.5rem, 6vw, 5rem); }
.events-hero-copy {
  align-self: end;
  display: grid;
  justify-items: start;
  gap: 1.75rem;
}
.events-hero-title {
  margin: 0 0 0.25rem -0.05em;
  font: 600 clamp(4.25rem, 13vw, 14rem)/0.86 var(--font-display);
  letter-spacing: -0.065em;
}
.events-hero-lede {
  max-width: 26rem;
  font: 400 clamp(1.05rem, 0.4vw + 0.95rem, 1.3rem)/1.5 var(--font-display);
  color: var(--white-75);
}
.events-hero .btn:hover .btn-arrow { transform: translateY(3px); }
.events-hero-photo { align-self: end; aspect-ratio: 4 / 3; }

@media (max-width: 900px) {
  .events-hero { min-height: 0; }
  .events-hero-copy { gap: 1.4rem; }
}
@media (max-width: 700px) {
  .events-hero {
    grid-template-columns: 1fr;
    grid-template-rows: none;
    row-gap: 2.25rem;
    padding-bottom: 2.5rem;
  }
  .events-hero .section-head { margin-bottom: 0; }
  .events-hero-title { font-size: clamp(3.75rem, 19vw, 5.5rem); }
  .events-hero-photo { aspect-ratio: 5 / 4; }
  .events-hero-photo img { object-position: 30% 50%; }
}

/* Tally: one times sign, then a row of them. The count doubles as it
   scrolls through (1, 2, 4 ... 32); events.js drives it, CSS holds the rest.
   ========================================================================== */
.events-tally { padding: 0 var(--gutter); }
.events-tally-row {
  --tally-n: 32;
  display: grid;
  grid-template-columns: repeat(var(--tally-n), minmax(0, 1fr));
  align-items: center;
  justify-items: center;
  height: clamp(4rem, 7vw, 6rem);
  border-top: var(--line);
  border-bottom: var(--line);
}
.events-tally-mark {
  color: var(--white-60);
  transform: rotate(45deg);
}
.events-tally-mark:first-child { color: var(--paper); }
.js-motion .events-tally-mark { opacity: 0; }
.js-motion .events-tally-mark:first-child,
.reveal-all .events-tally-mark { opacity: 1; }

@media (max-width: 1100px) {
  .events-tally-row { --tally-n: 16; }
  .events-tally-mark:nth-child(n + 17) { display: none; }
}
@media (max-width: 600px) {
  .events-tally-row { --tally-n: 8; }
  .events-tally-mark:nth-child(n + 9) { display: none; }
}

@media (max-width: 900px) {
  .events-rooms,
  .events-upcoming,
  .events-past,
  .events-speak { padding-top: clamp(3.5rem, 9vw, 5rem); padding-bottom: clamp(3.5rem, 9vw, 5rem); }
  .events-upcoming { padding-bottom: 1.5rem; }
  .events-past .section-head,
  .events-upcoming .section-head,
  .events-rooms .section-head,
  .events-speak .section-head { margin-bottom: 2.25rem; }
}

/* Rooms: the people, wall to wall
   ========================================================================== */
.events-rooms-title {
  max-width: 19ch;
  margin-bottom: clamp(3rem, 6vw, 5.5rem);
  font: 600 clamp(2.2rem, 4.8vw, 5.4rem)/0.98 var(--font-display);
  letter-spacing: -0.045em;
  text-wrap: balance;
}
.events-wall {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  grid-auto-rows: clamp(12rem, 21vw, 24rem);
  gap: clamp(0.75rem, 1.4vw, 1.25rem);
}
.events-wall-item { min-width: 0; }
.events-wall-item--wide { grid-column: span 2; }
.events-wall-item .frame { height: 100%; }

@media (max-width: 900px) {
  .events-rooms-title { margin-bottom: 2.5rem; }
  .events-wall {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-rows: auto;
  }
  .events-wall-item--wide { grid-column: auto; }
  .events-wall-item .frame { height: auto; aspect-ratio: 4 / 5; }
}
@media (max-width: 600px) {
  /* registration marks on the sheet's corners, not on every tile */
  .events-wall {
    position: relative;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
  }
  .events-wall-item .frame { aspect-ratio: 1; }
  .events-wall .frame::before,
  .events-wall .frame::after { display: none; }
  .events-wall::before,
  .events-wall::after {
    content: "";
    position: absolute;
    z-index: 1;
    width: 13px;
    height: 13px;
    background:
      linear-gradient(var(--white-60), var(--white-60)) center / 1px 100% no-repeat,
      linear-gradient(var(--white-60), var(--white-60)) center / 100% 1px no-repeat;
  }
  .events-wall::before { top: -7px; left: -7px; }
  .events-wall::after { right: -7px; bottom: -7px; }
}

/* Timeline: one hairline spine, one rule per event, a node where they cross
   ========================================================================== */
.events-heading { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.events-timeline {
  --tl-date: clamp(6rem, 9vw, 9rem);
  --tl-spine: clamp(3.5rem, 5vw, 5rem);
  --tl-photo: clamp(13rem, 22vw, 21rem);
  position: relative;
  border-top: var(--line);
}
.events-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--tl-date) + var(--tl-spine) / 2);
  width: 1px;
  background: var(--white-10);
}
.events-row {
  position: relative;
  display: grid;
  grid-template-columns: var(--tl-date) var(--tl-spine) var(--tl-photo) minmax(0, 1fr);
  align-items: start;
  padding: clamp(1.75rem, 3vw, 2.75rem) 0;
  border-bottom: var(--line);
}
.events-row:focus-visible { outline: 1px solid var(--paper); outline-offset: -1px; }

.events-node {
  position: absolute;
  top: -0.8rem;
  left: calc(var(--tl-date) + var(--tl-spine) / 2 - 0.8rem);
  z-index: 1;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid var(--white-25);
  border-radius: 50%;
  background: var(--night);
  color: var(--paper);
  transition: border-color var(--dur-fast);
}
.events-node .events-cross {
  --cross: 11px;
  transform: rotate(45deg);
  transition: transform 0.9s var(--ease);
}
.events-row--next .events-node .events-cross { transform: none; }
/* events.js sets the plus first, then turns each node as its row comes in */
.events-live .events-row--past .events-cross { transform: none; transition: none; }
.events-live .events-row--turned .events-cross { transform: rotate(45deg); transition: transform 0.9s var(--ease); }

.events-date {
  grid-column: 1;
  display: grid;
  align-content: start;
  gap: 0.45rem;
  font: 500 0.7rem/1 var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  color: var(--white-60);
}
.events-date-day {
  font: 400 clamp(2.4rem, 3.4vw, 3.4rem)/0.9 var(--font-mono);
  letter-spacing: -0.04em;
  color: var(--paper);
}
.events-date-year { color: var(--white-40); }

.events-photo { grid-column: 3; aspect-ratio: 3 / 2; }
.events-photo--poster .frame-clip { background: var(--night-2); }
.events-mat { height: 100%; padding: 8%; }
.events-mat img { object-fit: contain; transform: none; }

.events-info {
  grid-column: 4;
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 1rem;
  padding-left: clamp(1.5rem, 3vw, 3rem);
}
.events-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  font: 500 0.68rem/1.4 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--white-60);
}
.events-badge {
  padding: 0.4rem 0.65rem 0.35rem;
  border: 1px solid var(--white-25);
  border-radius: 999px;
  color: var(--paper);
}
.events-title {
  max-width: 26ch;
  font: 600 clamp(1.45rem, 2vw, 2.25rem)/1.08 var(--font-display);
  letter-spacing: -0.03em;
  text-wrap: balance;
  transition: transform 0.6s var(--ease);
}
.events-excerpt {
  max-width: 38rem;
  font: 400 1rem/1.55 var(--font-display);
  color: var(--white-60);
}
.events-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.5rem;
  font: 500 0.92rem/1 var(--font-display);
}
.events-cta-arrow { width: 1.05rem; height: auto; transition: transform 0.6s var(--ease); }

@media (hover: hover) {
  .events-row--past:hover .events-node { border-color: var(--paper); }
  .events-row--past:hover .events-title { transform: translateX(0.4rem); }
  .events-row--past:hover .events-cta-arrow { transform: rotate(45deg); }
}

/* the next slot: an empty frame and a plus that has not turned yet */
.events-slot {
  grid-column: 3;
  display: grid;
  place-items: center;
  aspect-ratio: 3 / 2;
  border: 1px dashed var(--white-25);
  color: var(--white-40);
}
.events-slot .events-cross { --cross: 21px; }
.events-empty {
  grid-column: 4;
  align-self: center;
  padding-left: clamp(1.5rem, 3vw, 3rem);
  font: 500 clamp(1.25rem, 1.6vw, 1.75rem)/1.3 var(--font-display);
  letter-spacing: -0.02em;
  color: var(--white-60);
}

@media (max-width: 760px) {
  /* phones: the date leads, then the title, then the picture */
  .events-timeline { --tl-spine: 2.25rem; }
  .events-timeline::before,
  .events-node { left: calc(var(--tl-spine) / 2); }
  .events-node { margin-left: -0.8rem; }
  .events-row {
    grid-template-columns: var(--tl-spine) minmax(0, 1fr);
    row-gap: 0.85rem;
    padding: 1.75rem 0 2rem;
  }
  .events-info { display: contents; }
  .events-date,
  .events-photo,
  .events-meta,
  .events-title,
  .events-excerpt,
  .events-cta,
  .events-empty { grid-column: 2; margin-left: 0.75rem; }
  .events-date { order: 1; display: flex; align-items: baseline; gap: 0.6rem; }
  .events-date-day { font-size: 1.5rem; }
  .events-title { order: 2; max-width: none; font-size: clamp(1.3rem, 5.6vw, 1.55rem); }
  .events-meta { order: 3; }
  .events-photo { order: 4; aspect-ratio: 16 / 9; margin-top: 0.4rem; }
  .events-mat { padding: 7%; }
  .events-excerpt { order: 5; font-size: 0.95rem; }
  .events-cta { order: 6; justify-self: start; margin-top: 0.25rem; }
  .events-empty { padding-left: 0; font-size: 1.2rem; }
  .events-slot { display: none; }
}
}

/* Speaking: paper
   ========================================================================== */
.events-speak .frame::before,
.events-speak .frame::after {
  background:
    linear-gradient(var(--black-40), var(--black-40)) center / 1px 100% no-repeat,
    linear-gradient(var(--black-40), var(--black-40)) center / 100% 1px no-repeat;
}
.events-speak-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(2.5rem, 6vw, 7rem);
  align-items: center;
}
.events-speak-copy { display: grid; justify-items: start; gap: 1.5rem; }
.events-speak-x { width: clamp(4.5rem, 7vw, 7rem); height: auto; margin-bottom: 0.5rem; }
.events-speak-copy p {
  max-width: 32rem;
  font: 400 clamp(1.05rem, 0.4vw + 0.95rem, 1.25rem)/1.55 var(--font-display);
  color: var(--black-75);
}
.events-speak-copy .btn { margin-top: 0.5rem; }
.events-speak-photo { aspect-ratio: 922 / 641; }

@media (max-width: 900px) {
  .events-speak-grid { grid-template-columns: 1fr; }
}