/* EAASI Partners Summit 2026 — design tokens (from BRIEF.md / README.md, keep exact) */
:root {
  --teal: #3DBFBF;
  --teal-dark: #2f9e9e;
  --navy: #1A2340;
  --mid-navy: #2B3A67;
  --slate: #2C3E50;
  --ice-blue: #EEF2F8;
  --cloud: #F5F8FF;
  --periwinkle: #C8D4E8;
  --gold: #C9A84C;
  --silver: #6A7A8E;
  --bronze: #A0704A;

  --font-sans: Calibri, "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;

  --radius-card: 16px;
  --radius-chip: 999px;
  --shadow-card: 0 4px 16px rgba(26, 35, 64, 0.08);
  --shadow-nav: 0 -2px 12px rgba(26, 35, 64, 0.10);

  --nav-height: 64px;
  --header-height: 56px;
  --app-max-width: 640px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--slate);
  background: var(--ice-blue);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: none;
}

#app-shell {
  max-width: var(--app-max-width);
  margin: 0 auto;
  min-height: 100vh;
  background: var(--ice-blue);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 0 40px rgba(26, 35, 64, 0.06);
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

h1, h2, h3, h4 { margin: 0; font-weight: 700; color: var(--navy); }

/* ---------- Header ---------- */
.app-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--navy);
  color: var(--cloud);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-shrink: 0;
}
.app-header .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
}
.app-header .brand .scan-glyph-mark {
  width: 30px;
  height: 15px;
  flex-shrink: 0;
}
.app-header .section-title {
  font-size: 13px;
  color: var(--teal);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- Hamburger button (mobile only) ---------- */
.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  gap: 4px;
  width: 32px;
  height: 32px;
  padding: 6px 4px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger-btn span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--cloud);
}
.hamburger-btn span:nth-child(2) { width: 70%; }

/* ---------- Mobile nav drawer ---------- */
.mobile-menu {
  position: fixed;
  inset: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--app-max-width);
  z-index: 60;
  background: var(--navy);
  display: flex;
  flex-direction: column;
}
.mobile-menu-header {
  height: var(--header-height);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid rgba(245, 248, 255, 0.1);
}
.mobile-menu-header .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  color: var(--cloud);
}
.mobile-menu-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 16px 24px;
}
.mobile-menu-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 6px;
  border-bottom: 1px solid rgba(245, 248, 255, 0.08);
  color: rgba(245, 248, 255, 0.8);
  font-size: 16px;
  font-weight: 700;
}
.mobile-menu-item svg { width: 22px; height: 22px; flex-shrink: 0; }
.mobile-menu-item.is-active { color: var(--teal); }

/* ---------- Main content ---------- */
main {
  flex: 1;
  padding: 20px 16px calc(var(--nav-height) + 28px);
}

.section-heading {
  position: relative;
  padding-left: 14px;
  margin-bottom: 16px;
}
.section-heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  bottom: 2px;
  width: 4px;
  border-radius: 2px;
  background: var(--teal);
}
.section-heading h1 {
  font-size: 26px;
  line-height: 1.15;
}
.section-heading p {
  margin: 4px 0 0;
  color: var(--mid-navy);
  font-size: 14px;
}

/* ---------- Venue ---------- */
.venue-hero-img {
  display: block;
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
}

/* ---------- Cards ---------- */
.card {
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 18px;
  margin-bottom: 14px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--teal);
}
.card.card--flush { padding: 0; overflow: hidden; }

/* ---------- Tickets ---------- */
.fee-table-heading {
  font-size: 16px;
  font-weight: 800;
  color: var(--teal-dark);
  padding: 16px 18px 6px;
}
.fee-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px;
  border-top: 1px dashed var(--periwinkle);
}
.fee-label {
  font-weight: 700;
  color: var(--navy);
  font-size: 14px;
}
.fee-tier {
  font-weight: 400;
  color: var(--mid-navy);
}
.fee-price {
  font-weight: 700;
  color: var(--slate);
  font-size: 15px;
  white-space: nowrap;
}
.card.card--tappable {
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card.card--tappable:active { transform: scale(0.98); }

.card h3 { font-size: 17px; margin-bottom: 4px; }
.card .meta {
  font-size: 13px;
  color: var(--mid-navy);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin-bottom: 8px;
}
.card .desc { font-size: 14px; line-height: 1.5; color: var(--slate); }

/* ---------- Buttons / chips ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 12px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  background: var(--teal);
  color: var(--navy);
}
.btn:active { background: var(--teal-dark); }
.buy-tickets-btn {
  width: 100%;
  padding: 15px 18px;
  font-size: 15.5px;
  border-radius: 14px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
}
.buy-tickets-btn svg { width: 20px; height: 20px; }
.btn.btn--ghost {
  background: transparent;
  border: 1.5px solid var(--teal);
  color: var(--navy);
}
.btn.btn--outline-light {
  background: transparent;
  border: 1.5px solid rgba(245, 248, 255, 0.5);
  color: var(--cloud);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: var(--radius-chip);
  font-size: 13px;
  font-weight: 600;
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  color: var(--mid-navy);
  cursor: pointer;
  white-space: nowrap;
}
.chip.is-active {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--navy);
}

.chip-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 16px;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.chip-row::-webkit-scrollbar { display: none; }

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  border-radius: var(--radius-chip);
  background: var(--mid-navy);
  color: var(--cloud);
}

/* ---------- Bottom nav ---------- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--app-max-width);
  height: var(--nav-height);
  background: var(--navy);
  box-shadow: var(--shadow-nav);
  display: flex;
  overflow-x: auto;
  z-index: 30;
  scrollbar-width: none;
}
.bottom-nav::-webkit-scrollbar { display: none; }

@media (max-width: 699px) {
  .bottom-nav { display: none; }
  main { padding-bottom: 28px; }
}

.nav-item {
  flex: 1 0 auto;
  min-width: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  background: none;
  border: none;
  color: rgba(245, 248, 255, 0.55);
  padding: 6px 8px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.nav-item svg { width: 20px; height: 20px; }
.chevron { width: 18px; height: 18px; flex-shrink: 0; }
.external-icon { width: 15px; height: 15px; flex-shrink: 0; }
.sheet-close svg { width: 14px; height: 14px; }
.nav-item.is-active { color: var(--teal); }
.nav-item.is-active svg { filter: drop-shadow(0 0 6px rgba(61, 191, 191, 0.5)); }

/* ---------- Home hero ---------- */
.hero {
  position: relative;
  background: var(--navy);
  color: var(--cloud);
  border-radius: var(--radius-card);
  padding: 28px 20px 24px;
  margin-bottom: 18px;
  overflow: hidden;
}
.hero .scan-glyph-motif {
  position: absolute;
  top: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 320px;
  height: 160px;
  opacity: 0.22;
  pointer-events: none;
}
.hero .eyebrow {
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  position: relative;
}
.hero .logo-badge {
  position: relative;
  display: inline-block;
  background: var(--cloud);
  border-radius: 16px;
  padding: 14px 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
}
.hero .logo-badge img {
  display: block;
  height: 76px;
  width: auto;
}
.hero-tagline {
  position: relative;
  color: var(--teal);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.3;
  margin: 0 0 10px;
  max-width: 85%;
}
.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;
}
.hero h1 {
  color: var(--cloud);
  font-size: 28px;
  line-height: 1.2;
  margin-bottom: 6px;
  position: relative;
  max-width: 80%;
}
.hero .location-dates {
  font-size: 14px;
  color: var(--periwinkle);
  margin-bottom: 18px;
  position: relative;
}
.hero .welcome {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(245, 248, 255, 0.88);
  margin-bottom: 20px;
  position: relative;
}

.countdown {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 4px;
}
.countdown .unit {
  background: rgba(245, 248, 255, 0.08);
  border: 1px solid rgba(61, 191, 191, 0.35);
  border-radius: 12px;
  padding: 10px 4px;
  text-align: center;
}
.countdown .unit .num {
  font-size: 22px;
  font-weight: 800;
  color: var(--teal);
  font-variant-numeric: tabular-nums;
}
.countdown .unit .label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(245, 248, 255, 0.7);
}

.quick-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 8px;
}
.quick-link {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  border-radius: 12px;
  padding: 14px 12px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--navy);
  box-shadow: var(--shadow-card);
}
.quick-link .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
}
.quick-link svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--teal-dark);
}

/* ---------- Home sponsor strip ---------- */
.sponsor-strip {
  display: block;
  margin-top: 20px;
  padding: 16px 4px 4px;
  border-top: 1px solid var(--periwinkle);
}
.sponsor-strip-heading {
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--navy);
  text-align: center;
}
.sponsor-strip-thanks {
  font-size: 16px;
  font-weight: 800;
  color: var(--teal-dark);
  text-align: center;
  margin: 6px 0 18px;
}
.sponsor-strip-group { margin-bottom: 16px; }
.sponsor-strip-group:last-child { margin-bottom: 0; }
.sponsor-strip-group .tier-label {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--mid-navy);
  margin-bottom: 10px;
  text-align: center;
}
.sponsor-strip-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.sponsor-chip {
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  border-radius: 10px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
}
.sponsor-chip img {
  object-fit: contain;
  display: block;
}
/* Tiered sizing — Gold largest, Silver 90% of Gold, Bronze 80% of Gold */
.sponsor-chip--gold { height: 64px; }
.sponsor-chip--gold img { max-height: 46px; max-width: 160px; }
.sponsor-chip--silver { height: 58px; }
.sponsor-chip--silver img { max-height: 41px; max-width: 144px; }
.sponsor-chip--bronze { height: 51px; }
.sponsor-chip--bronze img { max-height: 37px; max-width: 128px; }
.sponsor-chip--text {
  font-size: 12px;
  font-weight: 700;
  color: var(--mid-navy);
}

/* ---------- Avatars / image placeholders ---------- */
.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mid-navy);
  color: var(--cloud);
  font-weight: 700;
  font-size: 18px;
  overflow: hidden;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar.avatar--lg { width: 88px; height: 88px; font-size: 26px; }

.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mid-navy);
  color: var(--periwinkle);
  font-size: 12px;
  font-weight: 600;
  text-align: center;
  padding: 8px;
}

/* ---------- Lists / rows ---------- */
.list-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.speaker-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.speaker-card {
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 14px 12px;
  text-align: center;
  cursor: pointer;
}
.speaker-card .avatar { margin: 0 auto 10px; }
.speaker-card h4 { font-size: 14px; margin-bottom: 2px; }
.speaker-card .role { font-size: 12px; color: var(--mid-navy); }
.speaker-card .company { font-size: 12px; color: var(--slate); font-weight: 600; }

/* ---------- Sponsors ---------- */
.sponsor-row {
  display: flex;
  align-items: center;
  gap: 14px;
}
.sponsor-logo {
  border-radius: 12px;
  flex-shrink: 0;
  object-fit: contain;
}
/* Tiered sizing — Gold largest, Silver 90% of Gold, Bronze 80% of Gold */
.sponsor-logo--gold { width: 140px; height: 84px; }
.sponsor-logo--silver { width: 126px; height: 76px; }
.sponsor-logo--bronze { width: 112px; height: 67px; }
.tier-badge {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 3px 10px;
  border-radius: var(--radius-chip);
  color: #fff;
  display: inline-block;
}
.tier-badge.tier-gold { background: var(--gold); color: #3a2f0f; }
.tier-badge.tier-silver { background: var(--silver); }
.tier-badge.tier-bronze { background: var(--bronze); }

/* ---------- Committees ---------- */
.committee-members {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--periwinkle);
  font-size: 13px;
  color: var(--slate);
}
.committee-members ul { margin: 6px 0 0; padding-left: 18px; }

/* ---------- FAQ accordion ---------- */
.faq-item { border-bottom: 1px solid var(--periwinkle); }
.faq-item:last-child { border-bottom: none; }
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 14px 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
}
.faq-question .chevron {
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--teal);
}
.faq-item.is-open .chevron { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease;
  font-size: 14px;
  line-height: 1.6;
  color: var(--slate);
}
.faq-item.is-open .faq-answer { max-height: 300px; padding-bottom: 14px; }

/* ---------- Info grid (Practical Info) ---------- */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.info-tile {
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  border-radius: 12px;
  padding: 12px;
}
.info-tile .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--teal-dark);
  font-weight: 800;
  margin-bottom: 4px;
}
.info-tile .value { font-size: 13.5px; line-height: 1.4; }

/* ---------- Day tabs (Agenda) ---------- */
.day-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
  scrollbar-width: none;
}
.day-tabs::-webkit-scrollbar { display: none; }
.day-tab {
  flex-shrink: 0;
  background: var(--cloud);
  border: 1px solid var(--periwinkle);
  border-radius: 12px;
  padding: 10px 14px;
  text-align: center;
  cursor: pointer;
  min-width: 84px;
}
.day-tab .d1 { font-size: 11px; color: var(--mid-navy); font-weight: 700; text-transform: uppercase; }
.day-tab .d2 { font-size: 15px; font-weight: 800; color: var(--navy); }
.day-tab.is-active { background: var(--navy); border-color: var(--navy); }
.day-tab.is-active .d1 { color: var(--teal); }
.day-tab.is-active .d2 { color: var(--cloud); }

.agenda-sponsor-logo {
  max-height: 30px;
  max-width: 100px;
  object-fit: contain;
  display: block;
}
.agenda-sponsor-logo--text {
  font-size: 11px;
  font-weight: 700;
  color: var(--mid-navy);
  white-space: nowrap;
}

.session-time {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 52px;
  color: var(--navy);
  font-weight: 800;
  font-size: 13px;
}
.session-time .end { color: var(--mid-navy); font-weight: 600; font-size: 11.5px; }

/* ---------- Overlay / detail modal ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.overlay .backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 35, 64, 0.55);
}
.overlay .sheet {
  position: relative;
  width: 100%;
  max-width: var(--app-max-width);
  max-height: 86vh;
  overflow-y: auto;
  background: var(--ice-blue);
  border-radius: 20px 20px 0 0;
  padding: 20px 18px calc(24px + env(safe-area-inset-bottom));
  animation: sheet-up 0.2s ease;
}
@keyframes sheet-up {
  from { transform: translateY(24px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.sheet-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--cloud);
  color: var(--navy);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

/* ---------- Section divider (navy rhythm) ---------- */
.divider-band {
  background: var(--navy);
  color: var(--cloud);
  border-radius: var(--radius-card);
  padding: 16px 18px;
  margin-bottom: 16px;
}
.divider-band h3 { color: var(--cloud); font-size: 15px; }
.divider-band p { color: rgba(245,248,255,0.75); font-size: 13px; margin: 4px 0 0; }

/* ---------- Loading / empty states ---------- */
.state-msg {
  text-align: center;
  padding: 40px 20px;
  color: var(--mid-navy);
  font-size: 14px;
}

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; }
.text-teal { color: var(--teal-dark); }
.external-icon { display: inline-block; margin-left: 4px; vertical-align: -1px; }

@media (min-width: 700px) {
  :root { --app-max-width: 760px; }
  body { background: var(--mid-navy); }
  .speaker-grid { grid-template-columns: repeat(3, 1fr); }
  .quick-links { grid-template-columns: repeat(4, 1fr); }
  .info-grid { grid-template-columns: repeat(3, 1fr); }
  .hamburger-btn { display: none; }
  .mobile-menu { display: none; }
}