:root {
  /* Official summit artwork and Sched category colors anchor this interface palette. */
  --color-paper: #071a2d;
  --color-paper-deep: #0c243b;
  --color-surface: #102d47;
  --color-ink: #eef8ff;
  --color-ink-soft: #acc4d5;
  --color-primary: #52b9f8;
  --color-primary-soft: #173c5b;
  --color-signal: #ffd24a;
  --color-signal-soft: #473b13;
  --color-highlight: #29d9e5;
  --color-border: #315873;
  --color-border-strong: #75a6c8;
  --color-success: #75d89e;
  --font-ui: "Sora", ui-sans-serif, system-ui, sans-serif;
  --font-reading: "Source Serif 4", Georgia, serif;
  --shadow-offset: 5px 5px 0 rgba(0, 0, 0, 0.28);
  --radius-sm: 0.35rem;
  --radius-md: 0.65rem;
  --page-width: 72rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  min-height: 100dvh;
  margin: 0;
  background:
    linear-gradient(rgba(117, 166, 200, 0.075) 1px, transparent 1px),
    var(--color-paper);
  background-size: 100% 2rem;
  color: var(--color-ink);
  font-family: var(--font-ui);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
input,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 3px solid var(--color-signal);
  outline-offset: 3px;
}

a {
  color: inherit;
}

svg {
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--color-ink);
  color: white;
  text-decoration: none;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: env(safe-area-inset-top, 0);
  background: color-mix(in srgb, var(--color-paper) 94%, transparent);
  border-bottom: 2px solid var(--color-border-strong);
  backdrop-filter: blur(12px);
}

.masthead,
.tab-nav,
main,
.app-footer {
  width: min(100%, var(--page-width));
  margin-inline: auto;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 1rem 0.4rem;
}

.event-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
  text-decoration: none;
}

.event-mark-image {
  display: block;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  border: 1px solid var(--color-border-strong);
  object-fit: cover;
  transform: rotate(-2deg);
  box-shadow: 3px 3px 0 var(--color-signal);
}

.event-eyebrow,
.event-name {
  display: block;
}

.event-eyebrow {
  color: var(--color-primary);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.event-name {
  max-width: 18rem;
  overflow: hidden;
  font-size: clamp(0.9rem, 2.3vw, 1.08rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.quiet-button,
.official-link,
.text-button {
  min-height: 44px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
}

.quiet-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0 0.75rem;
}

.quiet-button svg {
  width: 1.1rem;
}

.official-link {
  align-items: center;
  padding: 0.72rem 0.85rem;
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.quiet-button:hover,
.text-button:hover {
  background: var(--color-primary-soft);
}

.tab-nav {
  display: flex;
  padding-inline: 1rem;
}

.tab-button {
  position: relative;
  min-height: 48px;
  flex: 1;
  border: 0;
  background: transparent;
  color: var(--color-ink-soft);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.tab-button::after {
  position: absolute;
  right: 0.35rem;
  bottom: -2px;
  left: 0.35rem;
  height: 4px;
  background: transparent;
  content: "";
}

.tab-button.is-active {
  color: var(--color-ink);
}

.tab-button.is-active::after {
  background: var(--color-signal);
}

.tab-count {
  display: inline-grid;
  min-width: 1.25rem;
  min-height: 1.25rem;
  margin-left: 0.2rem;
  padding: 0.1rem 0.3rem;
  place-content: center;
  border-radius: 999px;
  background: var(--color-signal);
  color: white;
  font-size: 0.65rem;
}

main {
  padding: 1.25rem 1rem 4rem;
}

.event-brief {
  display: grid;
  gap: 1.25rem;
  gap: 1rem;
  padding: 1rem 0 1.6rem;
  border-bottom: 1px solid var(--color-border-strong);
}

.brand-banner {
  display: block;
  width: 100%;
  height: clamp(5.5rem, 10vw, 8.5rem);
  border: 2px solid var(--color-border-strong);
  background: var(--color-ink);
  box-shadow: var(--shadow-offset);
  object-fit: cover;
  object-position: center;
}

.kicker {
  margin: 0 0 0.35rem;
  color: var(--color-primary);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  margin-bottom: 0.65rem;
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

h2 {
  font-size: clamp(1.7rem, 4vw, 2.65rem);
}

h3 {
  margin-bottom: 0;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.event-brief-copy > p:last-child {
  max-width: 62ch;
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
  font-size: 1.05rem;
  line-height: 1.65;
}

.event-facts {
  display: grid;
  margin: 0;
  border-top: 1px solid var(--color-border-strong);
}

.event-facts div {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0.75rem;
  padding: 0.72rem 0;
  border-bottom: 1px solid var(--color-border);
}

.event-facts dt {
  color: var(--color-ink-soft);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.event-facts dd {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
}

.tab-panel {
  padding-top: 2rem;
}

.section-heading,
.subheading-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.section-heading h2 {
  margin-bottom: 0;
}

.result-count,
.subheading-row span {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.72rem;
  font-weight: 600;
  text-align: right;
}

.data-notice {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1.5rem;
  padding: 1rem;
  border: 1px dashed var(--color-signal);
  background: var(--color-signal-soft);
}

.data-notice-stamp {
  padding: 0.28rem 0.4rem;
  border: 2px solid currentColor;
  color: var(--color-signal);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  transform: rotate(-3deg);
}

.data-notice strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.86rem;
}

.data-notice p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
  font-size: 0.93rem;
  line-height: 1.5;
}

.data-notice[data-status="verified"] {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.data-notice[data-status="verified"] .data-notice-stamp {
  color: var(--color-primary);
}

.agenda-tools {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.search-field {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 48px;
  padding: 0 0.8rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.search-field:focus-within {
  box-shadow: var(--shadow-offset);
}

.search-field svg {
  width: 1.1rem;
  flex: 0 0 auto;
}

.search-field input {
  width: 100%;
  min-width: 0;
  padding: 0.75rem 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--color-ink);
  font-size: 1rem;
}

.search-field input::placeholder,
textarea::placeholder {
  color: #747b7d;
  opacity: 1;
}

.filter-row {
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  padding: 0.15rem 0 0.3rem;
  scrollbar-width: thin;
}

.filter-button {
  --track-color: var(--color-primary-soft);
  min-height: 40px;
  flex: 0 0 auto;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 700;
}

.filter-button:not([data-track-id="all"])::before {
  display: inline-block;
  width: 0.65rem;
  height: 0.65rem;
  margin-right: 0.42rem;
  border: 1px solid color-mix(in srgb, var(--track-color) 70%, var(--color-ink));
  border-radius: 50%;
  background: var(--track-color);
  content: "";
  vertical-align: -0.05rem;
}

.filter-button[aria-pressed="true"] {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: white;
}

.agenda-list,
.people-list {
  border-top: 2px solid var(--color-border-strong);
}

.session-item,
.person-item {
  border-bottom: 1px solid var(--color-border-strong);
  background: color-mix(in srgb, var(--color-surface) 55%, transparent);
}

.session-item.is-saved {
  background: linear-gradient(90deg, var(--color-primary-soft), transparent 65%);
}

.session-trigger,
.person-trigger {
  display: grid;
  width: 100%;
  min-height: 72px;
  border: 0;
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  text-align: left;
}

.session-trigger {
  grid-template-columns: 5rem 1fr 1.5rem;
  gap: 0.75rem;
  align-items: start;
  padding: 1rem 0.25rem;
}

.session-time {
  padding-top: 0.15rem;
  color: var(--color-primary);
  font-size: 0.74rem;
  font-weight: 700;
}

.session-type,
.session-title,
.session-speakers {
  display: block;
}

.session-type {
  margin-bottom: 0.3rem;
  color: var(--color-signal);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.session-title {
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.35;
}

.session-speakers {
  margin-top: 0.35rem;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
  font-size: 0.87rem;
}

.chevron {
  padding-top: 0.25rem;
  font-size: 1rem;
  transition: transform 180ms ease;
}

[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.session-body,
.person-body {
  padding: 0 0.25rem 1.15rem 6rem;
}

.session-description,
.person-bio {
  max-width: 68ch;
  margin-bottom: 0.9rem;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
  font-size: 0.95rem;
  line-height: 1.6;
}

.session-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin-bottom: 0.8rem;
  color: var(--color-ink-soft);
  font-size: 0.7rem;
  font-weight: 600;
}

.track-chip {
  --track-color: var(--color-primary-soft);
  display: inline-flex;
  margin: 0 0.35rem 0.45rem 0;
  padding: 0.2rem 0.48rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--track-color) 70%, var(--color-ink));
  background: var(--track-color);
  color: var(--color-ink);
  font-size: 0.65rem;
  font-weight: 700;
}

.filter-button[data-track-id="keynote"],
.track-chip.track-keynote {
  --track-color: #f3827f;
}

.filter-button[data-track-id="enhancing-teaching-and-learning"],
.track-chip.track-enhancing-teaching-and-learning {
  --track-color: #92fea4;
}

.filter-button[data-track-id="strategic-leadership-and-digital-stewardship"],
.track-chip.track-strategic-leadership-and-digital-stewardship {
  --track-color: #bdbff4;
}

.filter-button[data-track-id="student-creation-inquiry-and-problem-solving"],
.track-chip.track-student-creation-inquiry-and-problem-solving {
  --track-color: #ff8fdc;
}

.filter-button[data-track-id="transforming-data-insights-into-action"],
.track-chip.track-transforming-data-insights-into-action {
  --track-color: #6fe7ff;
}

.filter-button[data-track-id="workflow-innovation-and-efficiency"],
.track-chip.track-workflow-innovation-and-efficiency {
  --track-color: #fff492;
}

.session-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.save-button,
.note-save-button,
.source-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 700;
  text-decoration: none;
}

.save-button.is-saved {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: white;
}

.session-note-wrap {
  width: 100%;
  margin-top: 0.65rem;
}

.session-note-wrap textarea,
.quick-notes textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-reading);
  font-size: 1rem;
  line-height: 1.55;
  resize: vertical;
}

.session-note-wrap textarea {
  margin-bottom: 0.45rem;
}

.person-trigger {
  grid-template-columns: 3rem 1fr 1.5rem;
  gap: 0.75rem;
  align-items: center;
  padding: 1rem 0.25rem;
}

.person-initials {
  display: grid;
  width: 2.65rem;
  height: 2.65rem;
  place-content: center;
  background: var(--color-highlight);
  color: var(--color-ink);
  font-size: 0.76rem;
  font-weight: 700;
}

.person-name {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
}

.person-role {
  display: block;
  margin-top: 0.15rem;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
  font-size: 0.82rem;
}

.person-body {
  padding-left: 4rem;
}

.person-sessions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.session-jump {
  min-height: 40px;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 600;
  text-align: left;
}

.empty-state {
  padding: 3rem 1rem;
  border-bottom: 1px solid var(--color-border-strong);
  text-align: center;
}

.empty-state-mark {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.5rem 0.65rem;
  border: 2px solid var(--color-border-strong);
  background: var(--color-highlight);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transform: rotate(-2deg);
}

.empty-state h3 {
  margin-bottom: 0.45rem;
}

.empty-state p {
  max-width: 52ch;
  margin: 0 auto;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
}

.people-search {
  margin-bottom: 1.25rem;
}

.my-day-heading {
  align-items: center;
}

.my-day-actions {
  display: flex;
  gap: 0.4rem;
}

.text-button {
  padding: 0.55rem 0.7rem;
}

.text-button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.privacy-note {
  display: grid;
  grid-template-columns: 1.35rem 1fr;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding: 0.85rem 0;
  border-block: 1px solid var(--color-border);
}

.privacy-note svg {
  width: 1.25rem;
  color: var(--color-primary);
}

.privacy-note p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-family: var(--font-reading);
  font-size: 0.88rem;
}

.saved-section,
.quick-notes {
  margin-bottom: 2rem;
}

.saved-session {
  display: grid;
  grid-template-columns: 5rem 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-border);
}

.saved-session-time {
  color: var(--color-primary);
  font-size: 0.7rem;
  font-weight: 700;
}

.saved-session-title {
  font-size: 0.82rem;
  font-weight: 700;
}

.remove-saved {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--color-signal);
  cursor: pointer;
  font-size: 1.1rem;
}

.quick-notes textarea:focus {
  border-color: var(--color-primary);
  outline: 3px solid var(--color-primary-soft);
}

.app-footer {
  padding: 1.5rem 1rem calc(1.5rem + env(safe-area-inset-bottom, 0));
  border-top: 2px solid var(--color-border-strong);
  color: var(--color-ink-soft);
  font-size: 0.7rem;
}

.app-footer p {
  margin-bottom: 0.25rem;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0));
  z-index: 200;
  max-width: min(22rem, calc(100vw - 2rem));
  padding: 0.8rem 1rem;
  border: 1px solid var(--color-border-strong);
  background: var(--color-ink);
  color: white;
  font-size: 0.78rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.75rem);
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.noscript-message {
  position: fixed;
  inset: auto 1rem 1rem;
  z-index: 500;
  padding: 1rem;
  border: 2px solid var(--color-ink);
  background: var(--color-highlight);
  color: var(--color-ink);
  font-weight: 700;
}

@media (min-width: 48rem) {
  .masthead,
  .tab-nav,
  main,
  .app-footer {
    padding-inline: 2rem;
  }

  .tab-nav {
    justify-content: flex-start;
  }

  .tab-button {
    max-width: 10rem;
  }

  .event-brief {
    grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.7fr);
    gap: 3rem;
    align-items: end;
    padding-block: 2rem;
  }

  .brand-banner {
    grid-column: 1 / -1;
  }

  .tab-panel {
    padding-top: 3rem;
  }

  .agenda-tools {
    grid-template-columns: minmax(18rem, 0.7fr) minmax(0, 1.3fr);
    align-items: start;
  }

  .data-notice {
    max-width: 48rem;
  }
}

@media (max-width: 36rem) {
  .official-link,
  .quiet-button span {
    display: none;
  }

  .quiet-button {
    width: 44px;
    padding: 0;
  }

  .session-trigger {
    grid-template-columns: 4rem 1fr 1rem;
    gap: 0.55rem;
  }

  .session-body {
    padding-left: 4.8rem;
  }

  .data-notice {
    grid-template-columns: 1fr;
  }

  .data-notice-stamp {
    width: max-content;
  }

  .section-heading {
    align-items: flex-start;
  }

  .my-day-heading {
    display: block;
  }

  .my-day-actions {
    margin-top: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}