/* =============================================
   CONVERGENCE SUMMIT — styles.css

   Typeface: Inter (Google Fonts)
   Accent: #0c0c0c
   Background: gradient #b3d1d7 → #dce2e5
============================================= */


/* =============================================
   TOKENS
============================================= */
:root {
  --bg:      #f3e8e4;
  --accent:  #0c0c0c;
  --text:    #0c0c0c;
  --muted:   #555250;
  --line:    rgba(12, 12, 12, 0.18);

  --font:    'Inter', -apple-system, sans-serif;

  --nav-h:   72px;
  --radius:  12px;
  --max-w:   1440px;
  --pad-x:   52px;
}

/* =============================================
   RESET
============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  min-height: 100%;
  background: #f3e8e4;
}

body {
  background: transparent;
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.locked { overflow: hidden; }

/* =============================================
   SHARED
============================================= */
.section-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 124px;
}

/* All section headings — same size, centered, italic serif */
.section-heading {
  font-family: var(--font);
  font-size: 52px;
  font-weight: 700;
  font-style: normal;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 48px;
  text-align: left;
}


.section-tag {
  font-family: var(--font);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

/* =============================================
   NAV
============================================= */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-h);
  background: var(--bg);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 var(--pad-x);
  border-bottom: 1px solid var(--line);
}

.nav-logos {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Logo shared styles */
.logo-slot {
  height: 36px;
  flex-shrink: 0;
}

.logo-slot--placeholder {
  width: 88px;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* Pulse logo (black on white) — multiply removes white bg */
.logo-img {
  width: auto;
  height: 30px;
  object-fit: contain;
  mix-blend-mode: multiply;
}

/* TRIO-US logo — dark on transparent, multiply removes any white bg */
.logo-img--trio {
  mix-blend-mode: multiply;
  height: 20px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
.nav-link:hover {
  color: var(--text);
  text-decoration: underline;
}

.navbar .logo-img,
.navbar .logo-img--trio {
  mix-blend-mode: multiply;
}

.nav-wordmark {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.nav-right { display: flex; justify-content: flex-end; }

.learn-more-btn {
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 100px;
  padding: 10px 26px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.learn-more-btn:hover {
  background: #2a2a2a;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.nav-mobile-cta { display: none; }

/* =============================================
   MODAL
============================================= */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(12,12,12,0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }

.modal {
  position: relative;
  background: var(--bg);
  border-radius: 12px;
  padding: clamp(28px, 6vw, 52px) clamp(24px, 6vw, 52px) clamp(24px, 5vw, 44px);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(28px) scale(0.97);
  transition: transform 0.35s cubic-bezier(0.34, 1.2, 0.64, 1);
  box-shadow: 0 40px 100px rgba(12,12,12,0.2);
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }

.modal-close {
  position: absolute;
  top: 6px; right: 6px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none;
  font-size: 17px; color: var(--text);
  opacity: 0.3; cursor: pointer;
  transition: opacity 0.2s;
}
.modal-close:hover { opacity: 0.7; }

.modal-eyebrow {
  font-family: var(--font);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 10px;
}

.modal-title {
  font-family: var(--font);
  font-size: 28px; font-weight: 700;
  font-style: normal; line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.modal-subtitle {
  font-family: var(--font);
  font-size: 14px; color: var(--muted);
  margin-bottom: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
}

.form-group {
  display: flex; flex-direction: column;
  gap: 7px; margin-bottom: 20px;
  min-width: 0;
}

.form-group label {
  font-family: var(--font);
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
}

.form-group input,
.form-group textarea {
  font-family: var(--font);
  font-size: 16px; color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 15px;
  outline: none; resize: none;
  transition: border-color 0.2s;
  width: 100%;
  min-width: 0;
}
.form-group input:focus,
.form-group textarea:focus { border-color: rgba(12,12,12,0.4); }

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--muted); opacity: 0.6; }

.submit-btn {
  width: 100%;
  font-family: var(--font);
  font-size: 14px; font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--bg); background: var(--accent);
  border: none; border-radius: 100px;
  padding: 14px; cursor: pointer;
  margin-top: 4px;
  transition: background 0.2s;
}
.submit-btn:hover { background: #2a2a2a; }

/* =============================================
   HERO
============================================= */
#details { padding-top: var(--nav-h); }

.hero-container { padding: 20px var(--pad-x) 0; }

.hero-image-wrapper {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--nav-h) - 20px);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background-image: url('assets/venti-views-Bb30Sjvj-lE-unsplash.jpg');
  background-size: cover;
  background-position: center 30%;
}

/* Gradient overlay: dark at bottom for text legibility, opens up toward sky */
.hero-grain {
  position: absolute; inset: 0;
  background: linear-gradient(
    to top,
    rgba(4, 4, 4, 0.58) 0%,
    rgba(4, 4, 4, 0.12) 45%,
    rgba(4, 4, 4, 0.0) 100%
  );
}

.hero-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: flex-end;
  padding: 64px 72px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  font-family: var(--font);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(243,232,228,0.96);
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 100px;
  padding: 7px 18px;
  margin-bottom: 28px;
}

.hero-title {
  display: flex; flex-direction: column;
  gap: 10px; margin-bottom: 24px;
}

/* Both title lines — same size, same italic serif */
.hero-title-line {
  font-family: var(--font);
  font-size: clamp(72px, 10vw, 136px);
  font-weight: 800;
  font-style: normal;
  line-height: 0.92;
  color: #f3e8e4;
  letter-spacing: -0.03em;
  display: block;
}

.hero-subtitle {
  font-family: var(--font);
  font-size: clamp(15px, 1.4vw, 20px);
  font-weight: 300;
  letter-spacing: 0.04em;
  color: rgba(243,232,228,0.55);
}

/* =============================================
   DESCRIPTION
============================================= */
.description-section {
  padding: 100px 0 96px;
  border-top: 1px solid var(--line);
  margin-top: 40px;
}

.description-layout {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 80px;
  align-items: start;
}

.description-lead {
  font-family: var(--font);
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: pretty;
  min-width: 0;
}

.description-body {
  font-family: var(--font);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.9;
  color: var(--muted);
  text-wrap: pretty;
  min-width: 0;
}

/* =============================================
   CHAIRED BY
============================================= */
.chaired-section {
  padding: 96px 0;
  border-top: 1px solid var(--line);
}

.chairs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ---- Card ---- */
.chair-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 52px 36px 36px;
  border: 1px solid var(--line);
  border-radius: 12px;
  min-width: 0;
  cursor: pointer;
  /* Pop-out transition */
  transition:
    background   0.3s ease,
    color        0.3s ease,
    border-color 0.3s ease,
    transform    0.35s cubic-bezier(0.34, 1.3, 0.64, 1),
    box-shadow   0.35s ease;
}

.chair-card:hover {
  border-color: rgba(12,12,12,0.3);
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(12,12,12,0.12);
  z-index: 2;
}

.chair-image-placeholder {
  width: 100%;
  aspect-ratio: 3 / 2;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 28px;
  background: rgba(12,12,12,0.06);
  transition: background 0.3s ease;
}


.chair-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.chair-institution {
  font-family: var(--font);
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px;
  transition: color 0.3s;
}


.chair-name {
  font-family: var(--font);
  font-size: 24px; font-weight: 700;
  font-style: normal;
  letter-spacing: -0.01em;
  line-height: 1.1; color: var(--text);
  margin-bottom: 6px;
  transition: color 0.3s;
}


.chair-credentials {
  font-family: var(--font);
  font-size: 13px; color: var(--muted);
  margin-bottom: 12px;
  transition: color 0.3s;
}


.chair-title {
  font-family: var(--font);
  font-size: 14px; line-height: 1.55;
  color: var(--muted);
  transition: color 0.3s;
}


.chair-arrow {
  position: absolute;
  top: 14px;
  right: 16px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 400;
  line-height: 0;
  padding-bottom: 2px;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 50%;
  transform-origin: center center;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s, background 0.25s;
  cursor: pointer;
}
.chair-card.expanded .chair-arrow {
  transform: rotate(45deg);
}


/* ---- Panel overlay ---- */
.panel-overlay {
  position: fixed; inset: 0; z-index: 490;
  background: rgba(12,12,12,0.28);
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s ease;
}
.panel-overlay.active { opacity: 1; pointer-events: all; }

/* ---- Chair Panel — opens from the RIGHT, black bg ---- */
.chair-panel {
  position: fixed;
  top: 0; right: 0;
  width: 600px;
  height: 100vh;
  z-index: 500;
  background: var(--accent);   /* black */
  box-shadow: -12px 0 56px rgba(12,12,12,0.3);
  overflow-y: auto;
  padding: 60px 48px 52px;
  transform: translateX(100%);
  transition: transform 0.42s cubic-bezier(0.4, 0, 0.2, 1);
}
.chair-panel.open { transform: translateX(0); }

.panel-close {
  position: absolute;
  top: 22px; right: 24px;
  background: none; border: none;
  font-size: 18px;
  color: var(--bg);            /* warm blush on black */
  opacity: 0.45; cursor: pointer;
  transition: opacity 0.2s;
}
.panel-close:hover { opacity: 1; }

.panel-image-wrapper { margin-bottom: 32px; }

.panel-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center top;
  border-radius: 8px;
  display: block;
  /* slight warm-to-dark tint matches the black panel */
  filter: brightness(0.92) contrast(1.04);
}

.panel-institution {
  font-family: var(--font);
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(243,232,228,0.45);
  margin-bottom: 8px;
}

.panel-name {
  font-family: var(--font);
  font-size: 28px; font-weight: 700;
  font-style: normal; line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--bg);
  margin-bottom: 5px;
}

.panel-credentials {
  font-family: var(--font);
  font-size: 13px;
  color: rgba(243,232,228,0.5);
  margin-bottom: 24px;
}

.panel-rule {
  width: 36px; height: 1px;
  background: var(--bg); opacity: 0.2;
  margin-bottom: 20px;
}

.panel-role {
  font-family: var(--font);
  font-size: 14px; line-height: 1.65;
  color: rgba(243,232,228,0.6);
  margin-bottom: 20px;
}

.panel-description {
  font-family: var(--font);
  font-size: 15px; line-height: 1.8;
  color: rgba(243,232,228,0.75);
}

/* =============================================
   SPONSORS
============================================= */
.sponsors-section {
  padding: 96px 0 81px;
  border-top: 1px solid var(--line);
}

/* Vertical column sponsor grid */
.sponsors-grid {
  display: grid;
  grid-template-columns: 2.4fr 2fr 1.7fr 1.4fr;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.sponsor-col {
  padding: 28px 32px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.sponsor-col:last-child {
  border-right: none;
}

.sponsor-col-label {
  display: block;
  font-family: var(--font);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 36px;
}

.sponsor-logo-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.sponsor-logo-item {
  height: 124px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sponsor-logo-item a {
  display: contents;
}

.sponsor-img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
  display: block;
}

/* Per-logo sizing + optical nudges via transform */
.logo-gilead      { max-height: 144px; transform: translateY(2px); }
.logo-jj          { max-height: 60px; }
.logo-pfizer      { max-height: 80px; }
.logo-regeneron   { max-height: 100px; transform: translateY(-5px); }
.logo-genmab      { max-height: 68px;  transform: translateY(0px); }
.logo-astrazeneca { max-height: 148px; transform: translateY(-9px); }
.logo-abbvie      { max-height: 132px; }
.logo-abbvie-bronze { transform: translateY(-30px); }
.logo-daiichi-sankyo { max-height: 120px; }

/* =============================================
   AGENDA
============================================= */
.agenda-section {
  padding: 80px 0 100px;
  border-top: 1px solid var(--line);
}

.agenda-layout {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 52px;
  align-items: start;
}



/* Agenda day nav sidebar */
.agenda-nav-col {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
  align-self: start;
}

.agenda-day-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  padding: 10px 14px;
  background: none;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s;
  width: 100%;
}

.day-nav-btn:hover { background: rgba(12,12,12,0.06); }
.day-nav-btn.active { background: rgba(12,12,12,0.08); }

.day-nav-weekday {
  font-family: var(--font);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s;
}

.day-nav-date {
  font-family: var(--font);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text);
  transition: color 0.2s;
}

.day-nav-btn.active .day-nav-weekday,
.day-nav-btn.active .day-nav-date { color: var(--text); }

/* Glass card wrapping each day */
.agenda-card {
  background: linear-gradient(
    160deg,
    rgba(255, 250, 246, 0.72) 0%,
    rgba(255, 245, 238, 0.44) 100%
  );
  backdrop-filter: blur(24px) saturate(1.6) brightness(1.04);
  -webkit-backdrop-filter: blur(24px) saturate(1.6) brightness(1.04);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-top-color: rgba(255, 255, 255, 1);
  border-bottom-color: rgba(200, 185, 175, 0.25);
  border-radius: 12px;
  padding: 32px 36px 36px;
  margin-bottom: 20px;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.9) inset,
    0 4px 24px rgba(12, 12, 12, 0.07),
    0 1px 4px rgba(12, 12, 12, 0.04);
}

.agenda-card:last-child {
  margin-bottom: 0;
}

/* Date header above each day card */
.agenda-date-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  padding-bottom: 20px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.agenda-date-weekday {
  font-family: var(--font);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.agenda-date-full {
  font-family: var(--font);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* Day block */
.agenda-day {
  margin-bottom: 0;
}

/* ---- Event row — 3 columns ---- */
.agenda-event {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content minmax(140px, 200px);
  align-items: center;
  gap: 0 clamp(24px, 4vw, 80px);
  padding: 20px 0;
}

.event-num { display: none; }

.event-name {
  font-family: var(--font);
  font-size: 15px; font-weight: 600;
  line-height: 1.35;
  color: var(--text);
}

.event-time {
  font-family: var(--font);
  font-size: 15px; font-weight: 400;
  color: var(--muted);
  white-space: nowrap;
}

.event-speaker {
  font-family: var(--font);
  font-size: 15px;
  font-style: italic;
  color: var(--muted);
  text-align: left;
}

.agenda-disclaimer {
  font-family: var(--font);
  font-size: 15px;
  font-style: italic;
  color: var(--muted);
  text-align: left;
}

.agenda-disclaimer--day {
  margin-top: 4px;
}

/* Thin divider between events */
.event-divider {
  height: 1px;
  background: var(--line);
}


/* ---- Chair card expand content ---- */
.chair-expand-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.52s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
  opacity: 0;
}

.chair-card.expanded .chair-expand-content {
  max-height: 2400px;
  opacity: 1;
}

.chair-expand-rule {
  width: 100%;
  height: 1px;
  background: var(--line);
  margin: 24px 0;
}

.chair-expand-role {
  font-family: var(--font);
  font-size: 14px; font-weight: 300;
  line-height: 1.65;
  color: var(--muted);
  margin-bottom: 16px;
}

.chair-expand-bio {
  font-family: var(--font);
  font-size: 15px; font-weight: 300;
  line-height: 1.8;
  color: var(--text);
  margin-top: 20px;
}

/* =============================================
   FACULTY
============================================= */
.faculty-section {
  padding: 96px 0;
  border-top: 1px solid var(--line);
}

.faculty-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.faculty-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 0;
  min-width: 0;
  transition: transform 0.3s cubic-bezier(0.34, 1.3, 0.64, 1), box-shadow 0.3s ease;
}

.faculty-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(12,12,12,0.1);
}

.faculty-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: rgba(12,12,12,0.06);
  border-radius: 6px;
  overflow: hidden;
}

.faculty-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}


.faculty-info {
  padding: 16px 4px 20px;
}

.faculty-institution {
  font-family: var(--font);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 5px;
}

.faculty-name {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 4px;
}

.faculty-credentials {
  font-family: var(--font);
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 4px;
}

.faculty-role {
  font-family: var(--font);
  font-size: 11px;
  line-height: 1.5;
  color: var(--muted);
}

/* =============================================
   FOOTER
============================================= */
.footer {
  position: relative;
  border-top: 1px solid var(--line);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logos { display: flex; flex-wrap: wrap; gap: 16px 20px; align-items: center; justify-content: center; }
.footer-logos .logo-img { height: 24px; }
.footer-logos .logo-img--pulse { height: 18px; }

.footer-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  white-space: nowrap;
}

.footer-title {
  font-family: var(--font);
  font-size: 16px; font-weight: 700;
  letter-spacing: -0.015em;
}

.footer-sub {
  font-family: var(--font);
  font-size: 12px; color: var(--muted);
  margin-top: 3px;
}

.footer-copy {
  font-family: var(--font);
  font-size: 11px; color: var(--muted);
  letter-spacing: 0.04em; opacity: 0.55;
}

/* =============================================
   LOGO LINKS
============================================= */
.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity 0.2s;
}
.logo-link:hover { opacity: 0.75; }

/* =============================================
   HAMBURGER (hidden on desktop)
============================================= */
.nav-hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  padding: 0;
  margin-left: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.25s ease, opacity 0.25s ease;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* =============================================
   RESPONSIVE — 1100px (compact desktop)
============================================= */
@media (max-width: 1100px) {
  :root { --pad-x: 36px; }

  .nav-links { gap: 22px; }
  .nav-link  { font-size: 12px; }

  .section-heading { font-size: 44px; margin-bottom: 40px; }

  .hero-overlay { padding: 52px 52px; }
  .section-container { padding: 0 88px; }


  .agenda-event { gap: 0 40px; }

  .faculty-grid { grid-template-columns: repeat(4, 1fr); }

  .chair-panel { width: 520px; }
}

/* =============================================
   RESPONSIVE — 768px (tablet)
============================================= */
@media (max-width: 768px) {
  :root { --pad-x: 28px; --nav-h: 64px; }

  /* Nav */
  .navbar { grid-template-columns: auto 1fr auto; }

  .nav-links {
    display: flex;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 8px 0 16px;
    z-index: 199;
    transform: translateY(-110%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-link {
    width: 100%;
    padding: 12px var(--pad-x);
    font-size: 15px;
    color: var(--muted);
    opacity: 1;
    border-bottom: 1px solid var(--line);
  }
  .nav-link:last-child { border-bottom: none; }

  .learn-more-btn { display: none; }
  .nav-hamburger  { display: flex; }

  .nav-mobile-cta {
    display: inline-flex;
    margin: 12px var(--pad-x) 0;
  }

  /* Hero */
  .hero-container { padding: 12px var(--pad-x) 0; }
  .hero-image-wrapper {
    height: 90vw;
    min-height: 400px;
    border-radius: 12px;
  }
  .hero-overlay { padding: 28px 32px; }
  .hero-title-line { font-size: clamp(32px, 8vw, 52px); }

  /* Sections */
  .section-container { padding: 0 60px; }
  .section-heading { font-size: 36px; margin-bottom: 32px; }

  /* Description */
  .description-section { padding: 64px 0; }
  .description-layout { grid-template-columns: 1fr; gap: 24px; }
  .description-lead { font-size: 20px; }
  .description-body { font-size: 16px; }

  /* Chairs */
  .chaired-section { padding: 64px 0; }
  .chairs-grid     { grid-template-columns: 1fr; gap: 18px; }
  .chair-panel     { width: 100%; }

  /* Sponsors — stack tiers full-width on phone */
  .sponsors-section { padding: 64px 0; }
  .sponsors-grid    { grid-template-columns: 1fr; }

  /* Faculty — horizontal cards (photo left, info right) for legibility on phone */
  .faculty-section { padding: 64px 0; }
  .faculty-grid    { grid-template-columns: 1fr; gap: 18px; }
  .faculty-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
  }
  .faculty-photo {
    width: 72px;
    height: 72px;
    border-radius: 6px;
    flex-shrink: 0;
  }
  .faculty-info { padding: 2px 0 0; }
  .faculty-institution { font-size: 11px; margin-bottom: 6px; }
  .faculty-name { font-size: 16px; margin-bottom: 4px; }
  .faculty-credentials { font-size: 13px; margin-bottom: 6px; }
  .faculty-role { font-size: 13px; line-height: 1.4; }

  /* Agenda */
  .agenda-section { padding: 64px 0 80px; }
  .agenda-layout { grid-template-columns: 1fr; }
  .agenda-nav-col {
    position: static;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 16px;
  }
  .agenda-day-nav { flex-direction: row; flex-wrap: wrap; gap: 8px; }
  .day-nav-btn { padding: 8px 12px; }
  .day-nav-date { font-size: 15px; }



  /* Agenda events: name, time, speaker stacked */
  .agenda-event {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    gap: 3px 0;
    padding: 16px 0;
  }
  .event-name { grid-column: 1; grid-row: 1; font-size: 17px; }
  .event-time { grid-column: 1; grid-row: 2; }
  .event-speaker { grid-column: 1; grid-row: 3; text-align: left; }


  /* Footer */
  .footer-inner {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  .footer-center {
    position: static;
    left: auto;
    top: auto;
    transform: none;
    white-space: normal;
  }
}

/* =============================================
   RESPONSIVE — 480px (small mobile)
============================================= */
@media (max-width: 480px) {
  :root { --pad-x: 20px; }

  .hero-image-wrapper { height: 100vw; min-height: 460px; border-radius: 12px; }
  .hero-overlay       { padding: 20px 24px; }
  .hero-eyebrow       { font-size: 9.5px; letter-spacing: 0.1em; padding: 7px 14px; }
  .hero-title-line    { font-size: clamp(32px, 11vw, 48px); }
  .hero-subtitle      { font-size: 14px; }
  .section-container  { padding: 0 44px; }

  .section-heading { font-size: 30px; }
  .description-lead { font-size: 18px; }

  .agenda-event { gap: 0 24px; }
  .faculty-card { padding: 14px; gap: 14px; }
  .faculty-photo { width: 64px; height: 64px; }
  .sponsors-grid { grid-template-columns: 1fr; }
  .sponsor-col { padding: 20px 16px 16px; }
}