/* Conferences and speakers
   Index heroes, the event index, the A–Z directory and profile pages.
   Profiles share the video page poster: a 3-column rail, a 9-column body,
   each topped by a black rule.
   ---------------------------------------------------- */

/* Directory heroes share a shorter band, with titles anchored above the rule.
   Keep the letter picker at its full size on narrow screens. */
.discovery-hero.discovery-hero--index {
  --hero-height-scale: .64;
  block-size: calc((var(--hero-title-band) + var(--hero-padding-start) + var(--hero-padding-end) + var(--hero-stacked-size)) * var(--hero-height-scale) + 2px);
  grid-template-rows: minmax(min-content, 1fr);
  padding-block: calc(var(--hero-padding-start) * var(--hero-height-scale)) calc(var(--hero-padding-end) * var(--hero-height-scale));
  gap: calc(var(--hero-gap) * var(--hero-height-scale));
}
.discovery-hero--index h1 { grid-column: 1 / -1; }
.discovery-hero--index .az-nav { position: absolute; right: 0; bottom: calc(var(--hero-padding-end) * var(--hero-height-scale)); width: min(520px, 34%); margin: 0; }

/* Section headings match "All videos" on the home page. */
.directory-section { padding-block: clamp(40px, 4.2vw, 64px); }
.directory-section > .collection-header { margin-bottom: 24px; }
.directory-section > .collection-header h2 { font-size: clamp(28px, 2.6vw, 40px); font-weight: 600; letter-spacing: -.04em; line-height: 1.1; }
.directory-section + .directory-section { padding-top: 0; }
.discovery-hero--index + .directory-section { padding-top: 39px; }
.discovery-hero--index + .directory-section--events { padding-top: 0; }
.directory-section--events > .event-index { border-top: 0; }

/* Event index: one large row per conference */
.event-index { border-top: 2px solid var(--color-border); }
.event-row { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); align-items: baseline; gap: 8px 32px; padding: clamp(20px, 2.1vw, 32px) 0; border-bottom: 1px solid var(--color-border-subtle); }
.event-row__years { grid-column: 1 / 4; font-size: 17px; font-weight: 500; font-variant-numeric: tabular-nums; }
.event-row__name { grid-column: 4 / 10; min-width: 0; font-size: clamp(28px, 3.3vw, 56px); font-weight: 600; letter-spacing: -.045em; line-height: 1; overflow-wrap: anywhere; transition: color var(--transition-fast); }
.event-row__counts { grid-column: 10 / 13; display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 4px 24px; color: var(--color-text-secondary); font-size: 15px; font-variant-numeric: tabular-nums; }
.event-row:hover .event-row__name { color: var(--color-accent); }

/* Name lists: speakers at an event, events a speaker spoke at, the A–Z directory */
.name-list { columns: 4 220px; column-gap: 32px; }
.name-list li { break-inside: avoid; }
.name-list a { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px solid var(--color-border-subtle); font-size: 17px; line-height: 1.35; transition: color var(--transition-fast); }
.name-list a:hover { color: var(--color-accent); }
.name-list__count { flex-shrink: 0; color: var(--color-text-muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.directory-section > .name-list { border-top: 2px solid var(--color-border); }

/* Speaker portraits: one black-and-white treatment unifies mismatched photos */
.speaker-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 40px 24px; }
.speaker-portrait { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; background: var(--color-bg-tertiary); filter: grayscale(1) contrast(1.08); transition: filter var(--transition-slow); }
.speaker-card { display: block; }
.speaker-card:hover .speaker-portrait { filter: none; }
.speaker-card__name { display: block; margin-top: 14px; font-size: 19px; font-weight: 600; letter-spacing: -.025em; line-height: 1.15; transition: color var(--transition-fast); }
.speaker-card:hover .speaker-card__name { color: var(--color-accent); }
.speaker-card__meta { display: block; margin-top: 4px; color: var(--color-text-secondary); font-size: 13px; }

/* A–Z: jump letters in the hero, red initials in the rail */
.az-nav { display: grid; grid-template-columns: repeat(13, minmax(0, 1fr)); margin-top: 28px; border-top: 1px solid var(--color-border); border-left: 1px solid var(--color-border); max-width: 520px; }
.az-nav > * { display: grid; place-items: center; min-height: 40px; border-right: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); font-size: 15px; font-weight: 500; }
.az-nav a { transition: background-color var(--transition-fast), color var(--transition-fast); }
.az-nav a:hover { background: var(--color-text); color: var(--color-text-inverse); }
.az-nav span { color: var(--color-border-subtle); }
.az-group { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 0 32px; scroll-margin-top: calc(var(--site-header-height) + 16px); }
.az-group + .az-group { margin-top: 48px; }
.az-letter { grid-column: 1 / 4; align-self: start; position: sticky; top: calc(var(--site-header-height) + 24px); padding-top: 20px; border-top: 2px solid var(--color-border); color: var(--color-accent); font-size: clamp(64px, 7vw, 112px); font-weight: 600; letter-spacing: -.04em; line-height: .8; }
.az-group > .name-list { grid-column: 4 / 13; columns: 3 200px; padding-top: 9px; border-top: 2px solid var(--color-border); }

/* Profile pages: a poster header. A colophon of facts on the grid's
   quarters, the name sized to fill its column (data-measure comes from
   headline_measure, in ems), and the body flush left beneath it. */
.poster { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 32px; padding-bottom: clamp(48px, 6vw, 96px); }
.poster-colophon { grid-column: 1 / -1; display: grid; margin-top: clamp(40px, 5vw, 88px); grid-template-columns: subgrid; row-gap: 6px; padding-top: 16px; border-top: 2px solid var(--color-border); font-size: 17px; font-weight: 500; line-height: 1.35; font-variant-numeric: tabular-nums; }
.poster-colophon > li { grid-column: span 3; min-width: 0; }
.poster-colophon__years { color: var(--color-accent); }
.poster-colophon a { text-decoration: underline; text-decoration-color: var(--color-border-subtle); text-decoration-thickness: 1px; text-underline-offset: 4px; transition: color var(--transition-fast), text-decoration-color var(--transition-fast); }
.poster-colophon a:hover { color: var(--color-accent); text-decoration-color: currentColor; }
.poster-name { grid-column: 1 / -1; container-type: inline-size; align-self: end; padding: clamp(48px, 6vw, 104px) 0 clamp(24px, 2.6vw, 40px); }
.poster--portrait .poster-name { grid-column: 1 / 10; }
.poster-title { --measure: 20; margin: 0 0 0 -.045em; font-size: calc(97cqi / var(--measure)); font-weight: 600; letter-spacing: -.045em; line-height: .86; overflow-wrap: anywhere; }
.poster-title[data-measure="5"] { --measure: 5; }
.poster-title[data-measure="6"] { --measure: 6; }
.poster-title[data-measure="7"] { --measure: 7; }
.poster-title[data-measure="8"] { --measure: 8; }
.poster-title[data-measure="9"] { --measure: 9; }
.poster-title[data-measure="10"] { --measure: 10; }
.poster-title[data-measure="12"] { --measure: 12; }
.poster-title[data-measure="14"] { --measure: 14; }
.poster-title[data-measure="16"] { --measure: 16; }
.poster-title[data-measure="18"] { --measure: 18; }
.poster-portrait { grid-column: 10 / 13; align-self: end; margin-bottom: clamp(24px, 2.6vw, 40px); }
.poster-body { grid-column: 1 / -1; display: grid; grid-template-columns: subgrid; }
.poster-body > * { grid-column: 1 / 10; }
.poster-body > .profile-admin { justify-self: start; }
.poster-body > :first-child { margin-top: 0; }
.profile-description { max-width: 62ch; margin: 0; font-size: clamp(17px, 1.4vw, 21px); line-height: 1.55; }
.profile-actions { margin-top: 32px; }
.profile-admin { display: inline-block; margin-top: 24px; color: var(--color-text-secondary); font-size: 13px; text-decoration: underline; text-underline-offset: 4px; }
.profile-admin:hover { color: var(--color-text); }

/* Most watched: rank, picture, talk and views on the 12 columns */
.chart { border-top: 2px solid var(--color-border); }
.chart-row { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); align-items: start; gap: 16px 32px; padding: 24px 0; border-bottom: 1px solid var(--color-border-subtle); }
.chart-row__rank { grid-column: 1 / 2; font-size: clamp(56px, 5.6vw, 96px); font-weight: 600; letter-spacing: -.05em; line-height: .8; font-variant-numeric: tabular-nums; }
.chart-row__thumb { grid-column: 2 / 5; position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--color-bg-tertiary); }
.chart-row__thumb img { width: 100%; height: 100%; object-fit: cover; }
.chart-row__talk { grid-column: 5 / 11; min-width: 0; }
.chart-row__title { display: block; font-size: clamp(22px, 2.2vw, 34px); font-weight: 600; letter-spacing: -.035em; line-height: 1.08; text-wrap: balance; transition: color var(--transition-fast); }
.chart-row__speakers { display: block; margin-top: 12px; color: var(--color-text-secondary); font-size: 15px; }
.chart-row__views { grid-column: 11 / 13; justify-self: end; color: var(--color-text-secondary); font-size: 15px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.chart-row:hover .chart-row__title { color: var(--color-accent); }

/* Line-up: the event's speakers set as one bill, repeat speakers larger.
   Each name carries its slash in front; the list is pulled left by one
   slash and clipped at the grid edge, so no line starts with one. */
.lineup { --lineup-gap: clamp(28px, 2.4vw, 40px); padding-top: 20px; border-top: 2px solid var(--color-border); }
.lineup ul { display: flex; flex-wrap: wrap; align-items: baseline; row-gap: 6px; margin-left: calc(-1 * var(--lineup-gap)); clip-path: inset(-16px -16px -16px calc(var(--lineup-gap) - 4px)); font-size: clamp(20px, 1.8vw, 28px); font-weight: 500; letter-spacing: -.03em; line-height: 1.2; }
.lineup li { display: flex; align-items: baseline; white-space: nowrap; }
.lineup li::before { content: "/"; flex-shrink: 0; width: var(--lineup-gap); color: var(--color-border-subtle); font-size: clamp(20px, 1.8vw, 28px); font-weight: 300; text-align: center; }
.lineup a:focus-visible { outline-offset: 2px; }
.lineup a { transition: color var(--transition-fast); }
.lineup a:hover { color: var(--color-accent); }
.lineup .lineup__headliner { font-size: clamp(32px, 3.4vw, 56px); font-weight: 600; letter-spacing: -.045em; line-height: 1.05; }
.lineup__count { margin-left: .12em; color: var(--color-accent); font-size: .4em; font-weight: 500; letter-spacing: 0; vertical-align: super; font-variant-numeric: tabular-nums; }

/* Subscribe leads in red until pressed, then joins the black toggles */
.video-actions .video-action--subscribe[aria-pressed="false"] { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-text-inverse); }
.video-actions .video-action--subscribe[aria-pressed="false"]:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }

/* Talks on a profile, grouped under year numerals */
.talk-year { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin: 56px 0 0; padding-top: 20px; border-top: 2px solid var(--color-border); }
.collection-header + .talk-year { margin-top: 0; }
.talk-year__value { color: var(--color-accent); font-size: clamp(44px, 4.6vw, 72px); font-weight: 700; letter-spacing: -.05em; line-height: .9; font-variant-numeric: tabular-nums; }
.talk-year__count { color: var(--color-text-secondary); font-size: 13px; font-weight: 400; }
.directory-section > .collection-header + .talk-grid { border-top: 2px solid var(--color-border); }

.directory-empty { padding: 48px 0; border-top: 2px solid var(--color-border); color: var(--color-text-secondary); font-size: 17px; }

:is(.event-row, .name-list a, .speaker-card, .az-nav a, .profile-admin, .poster-colophon a, .chart-row, .lineup a):focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }

@media (max-width: 1023px) {
  .speaker-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 899px) {
  .discovery-hero.discovery-hero--index { grid-template-rows: minmax(min-content, 1fr) var(--hero-support-band); }
  .discovery-hero--index .az-nav { position: static; grid-row: 2; align-self: start; width: 100%; }
  .event-row__years { grid-column: 1 / -1; font-size: 15px; }
  .event-row__name { grid-column: 1 / 10; }
  .poster-colophon > li { grid-column: span 6; }
  .poster-body > * { grid-column: 1 / -1; }
  .chart-row { grid-template-rows: auto 1fr; row-gap: 12px; }
  .chart-row__rank { grid-column: 1 / 2; grid-row: 1 / span 2; }
  .chart-row__thumb { grid-column: 2 / 6; grid-row: 1 / span 2; }
  .chart-row__talk { grid-column: 6 / 13; }
  .chart-row__views { grid-column: 6 / 13; justify-self: start; }
  .az-letter { grid-column: 1 / 3; }
  .az-group > .name-list { grid-column: 3 / 13; }
}

@media (max-width: 599px) {
  .discovery-hero.discovery-hero--index h1 { font-size: 13vw; }
  .discovery-hero--index + .directory-section { padding-top: 24px; }
  .discovery-hero--index + .directory-section--events { padding-top: 0; }
  .event-row { gap: 8px; }
  .event-row__name, .event-row__counts { grid-column: 1 / -1; }
  .event-row__counts { justify-content: flex-start; }
  .speaker-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 16px; }
  .speaker-card__name { font-size: 17px; }
  .az-nav { grid-template-columns: repeat(7, minmax(0, 1fr)); }
  .az-nav > * { min-height: 44px; }
  .az-group { grid-template-columns: 1fr; }
  .az-letter { position: static; grid-column: 1; padding-bottom: 16px; font-size: 64px; }
  .az-group > .name-list { grid-column: 1; padding-top: 0; border-top: 0; }
  .poster { column-gap: 16px; }
  .poster--portrait .poster-name { grid-column: 1 / -1; }
  .poster-portrait { grid-column: 1 / 7; grid-row: 2; margin: 32px 0 0; }
  .poster--portrait .poster-name { padding-top: 32px; }
  .chart-row { gap: 12px 16px; }
  .chart-row { grid-template-rows: none; }
  .chart-row__rank { grid-column: 1 / 3; grid-row: auto; font-size: 48px; }
  .chart-row__thumb { grid-column: 3 / 13; grid-row: auto; }
  .chart-row__talk, .chart-row__views { grid-column: 3 / 13; }
  .chart-row__title { font-size: 21px; }
}