:root {
  color-scheme: light;
  --paper-bg: #f5f0e8;
  --paper-panel: rgba(255, 251, 245, 0.92);
  --ink: #1a2430;
  --muted: #647284;
  --line: #d8d2c8;
  --accent: #08758b;
  --accent-soft: #dceff2;
  --coral: #ff6257;
  --sky: #e6f5f6;
  --shadow: 0 20px 40px rgba(38, 50, 61, 0.08);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  background:
    radial-gradient(circle at top left, rgba(218, 229, 236, 0.9), transparent 30%),
    linear-gradient(180deg, #faf7f1 0%, var(--paper-bg) 100%);
}

#app {
  max-width: min(1720px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.site-header {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.25rem 1rem;
  background: var(--paper-panel);
  border: 1px solid rgba(216, 210, 200, 0.8);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.brand-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(260px, 520px) minmax(280px, 1fr);
  gap: 1.25rem;
  align-items: center;
}

.conference-logo-card,
.partner-logo-card {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(216, 210, 200, 0.82);
  background: #fff;
  box-shadow: 0 16px 28px rgba(38, 50, 61, 0.06);
}

.conference-logo-card {
  min-height: 160px;
  padding: 1rem 1.15rem;
  border-radius: 20px;
}

.conference-logo-card img {
  display: block;
  width: min(100%, 460px);
  height: auto;
}

.header-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 0.4rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  font-weight: 700;
}

#site-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4vw, 3.6rem);
  line-height: 0.96;
  font-weight: 600;
}

.site-subtitle,
.generated-at {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.site-subtitle:empty {
  display: none;
}

.site-nav,
.toolbar,
.programme-tools,
.day-switcher,
.papers-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-nav {
  align-items: center;
}

.programme-tools {
  align-items: center;
}

.toolbar[hidden] {
  display: none;
}

.nav-link,
.download-link,
.day-pill,
.talk-toggle,
.session-summary {
  appearance: none;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  text-decoration: none;
}

.nav-link,
.download-link,
.day-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.66);
  cursor: pointer;
}

.nav-link.is-active,
.day-pill.is-active {
  border-color: rgba(255, 98, 87, 0.28);
  background: var(--coral);
  color: #fff;
}

.download-link {
  color: var(--accent);
}

.toolbar {
  justify-content: space-between;
  align-items: center;
  margin: 1.15rem 0 1.6rem;
}

.view {
  display: block;
}

.view[hidden] {
  display: none;
}

.programme-block {
  margin-bottom: 1.75rem;
  padding: 1rem 1rem 0.4rem;
  border: 1px solid rgba(216, 210, 200, 0.78);
  border-radius: 22px;
  background: var(--paper-panel);
  box-shadow: var(--shadow);
}

.programme-block-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.programme-block-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.programme-block-time {
  margin: 0.18rem 0 0;
  font-family: var(--serif);
  font-size: 1.5rem;
}

.programme-block-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.programme-workspace {
  margin-bottom: 1.75rem;
}

.programme-workspace-layout {
  display: block;
  align-items: start;
}

.programme-workspace-layout.has-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.34fr);
  gap: 1rem;
}

.programme-timetable-scroll {
  border: 1px solid rgba(216, 210, 200, 0.78);
  border-radius: 22px;
  background: var(--paper-panel);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.session-panel {
  position: sticky;
  top: 1rem;
  display: none;
  max-height: calc(100vh - 2rem);
  overflow: auto;
  border: 1px solid rgba(216, 210, 200, 0.78);
  border-radius: 22px;
  background: var(--paper-panel);
  box-shadow: var(--shadow);
}

.session-panel.is-open {
  display: block;
}

.session-panel-empty {
  padding: 1rem;
  color: var(--muted);
}

.session-panel-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid rgba(216, 210, 200, 0.75);
  background: rgba(255, 251, 245, 0.98);
}

.session-panel-title {
  margin: 0.25rem 0 0.35rem;
  font-family: var(--serif);
  font-size: 1.45rem;
  line-height: 1.08;
}

.session-panel-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.session-panel-close {
  align-self: flex-start;
  min-height: 36px;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(8, 117, 139, 0.18);
  background: rgba(255, 255, 255, 0.78);
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}

.session-panel-talks {
  padding: 0.2rem 1rem 1rem;
}

.programme-timetable-grid {
  display: grid;
  min-width: 0;
  align-items: stretch;
  background: rgba(216, 210, 200, 0.65);
  gap: 1px;
}

.programme-timetable-corner,
.programme-timetable-room,
.programme-timetable-time,
.programme-timetable-cell {
  background: rgba(255, 251, 245, 0.96);
}

.programme-timetable-corner,
.programme-timetable-room {
  position: sticky;
  top: 0;
  z-index: 3;
  min-height: 52px;
  padding: 0.9rem 0.85rem;
  color: #23424b;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.programme-timetable-corner {
  left: 0;
  z-index: 4;
  background: var(--sky);
}

.programme-timetable-room {
  background: var(--sky);
  text-align: center;
}

.programme-timetable-time {
  position: sticky;
  left: 0;
  z-index: 2;
  min-height: 178px;
  padding: 1rem;
  border-left: 4px solid var(--coral);
}

.programme-timetable-time .programme-block-time {
  margin-top: 0.26rem;
}

.programme-timetable-cell {
  display: grid;
  gap: 0.7rem;
  min-width: 0;
  min-height: 178px;
  padding: 0.75rem;
  align-content: start;
}

.programme-timetable-cell.is-empty {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.45)),
    var(--paper-panel);
}

.programme-timetable-cell.is-empty::after {
  content: "";
  display: block;
  min-height: 100%;
  border-radius: 12px;
  border: 1px dashed rgba(8, 117, 139, 0.16);
}

.session-card {
  border: 1px solid rgba(216, 210, 200, 0.86);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  overflow: hidden;
}

.session-summary {
  display: block;
  width: 100%;
  padding: 1rem;
  cursor: pointer;
}

.session-card:hover,
.session-card:focus-within {
  border-color: rgba(8, 117, 139, 0.32);
  transform: translateY(-1px);
}

.session-card.is-expanded {
  border-color: rgba(8, 117, 139, 0.32);
  background: var(--accent-soft);
  box-shadow: 0 18px 32px rgba(8, 117, 139, 0.12);
}

.session-card.is-expanded .session-summary {
  background:
    linear-gradient(90deg, rgba(8, 117, 139, 0.16), rgba(255, 255, 255, 0) 58%),
    rgba(230, 245, 246, 0.88);
}

.session-card.is-expanded .session-title {
  color: #084f5f;
}

.paper-row-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.session-title {
  margin: 0 0 0.3rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1.08;
}

.session-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.session-detail {
  padding: 0 1rem 1rem;
  border-top: 1px solid rgba(216, 210, 200, 0.75);
}

.session-room,
.programme-timetable-cell .session-room {
  display: none;
}

.session-room[hidden] {
  display: none;
}

.talk-row {
  display: grid;
  gap: 0.6rem;
  padding-top: 0.8rem;
}

.talk-row + .talk-row {
  border-top: 1px solid rgba(216, 210, 200, 0.58);
}

.talk-row.is-expanded .talk-title {
  color: var(--accent);
}

.talk-heading {
  display: grid;
  gap: 0.22rem;
}

.talk-title {
  font-family: var(--serif);
  font-size: 1.03rem;
  line-height: 1.25;
}

.talk-title-link,
.paper-row-title-link {
  color: inherit;
  text-decoration: none;
}

.talk-title-link:hover,
.talk-title-link:focus-visible,
.paper-row-title-link:hover,
.paper-row-title-link:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.talk-authors {
  color: var(--muted);
  font-style: italic;
  font-size: 0.93rem;
}

.abstract-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  width: fit-content;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(39, 76, 119, 0.18);
  background: rgba(255, 255, 255, 0.72);
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}

.abstract-toggle:hover,
.abstract-toggle:focus-visible {
  border-color: rgba(39, 76, 119, 0.32);
  background: rgba(219, 230, 240, 0.7);
}

.abstract-panel {
  margin: 0.55rem 0 0.2rem;
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: var(--accent-soft);
  color: #253646;
  font-size: 0.95rem;
  line-height: 1.55;
}

.abstract-panel[hidden] {
  display: none;
}

.papers-controls {
  align-items: end;
  margin-bottom: 1rem;
}

.search-label {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0.35rem;
}

.paper-search {
  min-width: min(420px, 100%);
  min-height: 48px;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  font: inherit;
}

.papers-results {
  display: grid;
  gap: 0.85rem;
}

.paper-row {
  padding: 1rem;
  border: 1px solid rgba(216, 210, 200, 0.85);
  border-radius: 18px;
  background: var(--paper-panel);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.paper-row:hover,
.paper-row:focus-within {
  border-color: rgba(39, 76, 119, 0.28);
}

.paper-row-title {
  margin: 0 0 0.28rem;
  font-family: var(--serif);
  font-size: 1.15rem;
}

.is-focus-target {
  scroll-margin-top: 1.25rem;
  box-shadow: 0 0 0 3px rgba(39, 76, 119, 0.18);
}

.empty-state {
  padding: 1rem 0.2rem;
  color: var(--muted);
}

.site-footer {
  margin-top: 2rem;
  padding: 1rem;
  border: 1px solid rgba(216, 210, 200, 0.78);
  border-radius: 22px;
  background: var(--paper-panel);
  box-shadow: var(--shadow);
}

.partner-label {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.partner-logo-card {
  padding: clamp(0.7rem, 2vw, 1.25rem);
  border-radius: 18px;
}

.partner-logo-card img {
  display: block;
  width: min(100%, 920px);
  height: auto;
}

@media (max-width: 900px) {
  #app {
    max-width: none;
    padding: 16px 12px 48px;
  }

  .site-header {
    padding: 1rem;
  }

  .brand-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .conference-logo-card {
    min-height: 0;
    padding: 0.8rem;
    border-radius: 18px;
  }

  .programme-workspace {
    border-radius: 18px;
  }

  .programme-workspace-layout.has-panel,
  .programme-workspace-layout {
    display: block;
  }

  .programme-timetable-scroll {
    overflow: visible;
    border-radius: 18px;
  }

  .programme-timetable-grid {
    display: block;
    min-width: 0;
    background: transparent;
  }

  .programme-timetable-corner,
  .programme-timetable-room,
  .programme-timetable-cell.is-empty {
    display: none;
  }

  .programme-timetable-time {
    position: static;
    min-height: 0;
    margin: 0;
    padding: 1rem;
    border-top: 1px solid rgba(216, 210, 200, 0.78);
    border-left: 4px solid var(--coral);
    background: var(--sky);
  }

  .programme-timetable-time:first-of-type {
    border-top: 0;
  }

  .programme-timetable-cell {
    display: block;
    min-height: 0;
    padding: 0.85rem 1rem;
    background: rgba(255, 251, 245, 0.96);
  }

  .programme-timetable-cell::before {
    content: attr(data-room);
    display: block;
    margin: 0 0 0.5rem;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .programme-timetable-cell .session-room {
    display: inline;
  }

  .session-panel {
    position: fixed;
    inset: auto 0 0;
    z-index: 20;
    display: none;
    max-height: min(82vh, 720px);
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 22px 22px 0 0;
    box-shadow: 0 -20px 48px rgba(26, 36, 48, 0.18);
  }

  .session-panel.is-open {
    display: block;
  }

  .session-panel-empty {
    display: none;
  }

  .programme-block-grid {
    grid-template-columns: 1fr;
  }

  .toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .programme-tools {
    align-items: flex-start;
    flex-direction: column;
    width: 100%;
  }

  .paper-search {
    min-width: 0;
    width: 100%;
  }

}