/* ========================================
   NAAMA 2026 – Site Styles
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800&display=swap');

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:   #213467;
  --teal:   #54c6dc;
  --black:  #000000;
  --gray:   #787878;
  --steel:  #6b96bf;
  --white:  #ffffff;
  --light:  #f5f8fc;

  --h1: 2.8rem;
  --h2: 2rem;
  --h3: 1.4rem;
  --h4: 1.1rem;
  --body: 1rem;
  --small: 0.875rem;

  --radius: 8px;
  --shadow: 0 4px 24px rgba(33,52,103,.10);
  --transition: .25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Montserrat', sans-serif;
  font-size: var(--body);
  color: var(--black);
  background: var(--white);
  line-height: 1.7;
}

img { max-width: 100%; display: block; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }

/* ── Typography ── */
h1 { font-size: var(--h1); font-weight: 800; line-height: 1.15; }
h2 { font-size: var(--h2); font-weight: 700; line-height: 1.25; }
h3 { font-size: var(--h3); font-weight: 600; line-height: 1.35; }
h4 { font-size: var(--h4); font-weight: 600; }
p  { font-size: var(--body); font-weight: 400; }
.small { font-size: var(--small); }

/* ── Utility ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.text-center { text-align: center; }
.text-navy  { color: var(--navy); }
.text-teal  { color: var(--teal); }
.text-gray  { color: var(--gray); }

.btn {
  display: inline-block;
  padding: .75rem 1.75rem;
  border-radius: var(--radius);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .03em;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  border: none;
}
.btn:hover { opacity: .88; transform: translateY(-1px); }

.btn-primary { background: var(--teal); color: var(--white); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--teal);
  color: var(--teal);
}
.btn-outline:hover { background: var(--teal); color: var(--white); }
.btn-navy { background: var(--navy); color: var(--white); }
.btn-white { background: var(--white); color: var(--navy); }
.btn-disabled {
  background: rgba(255,255,255,.15);
  color: rgba(255,255,255,.5);
  border: 1px solid rgba(255,255,255,.2);
  cursor: default;
  pointer-events: none;
  font-size: .78rem;
  letter-spacing: .04em;
}
.btn-disabled:hover { opacity: 1; transform: none; }

section { padding: 5rem 0; }

/* ── Divider ── */
.divider {
  width: 60px; height: 4px;
  background: var(--teal);
  border-radius: 2px;
  margin: 1rem auto 2rem;
}
.divider-left { margin: 1rem 0 2rem; }

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--navy);
  box-shadow: 0 2px 12px rgba(0,0,0,.18);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100px;
  gap: 1rem;
  max-width: 100%;
  padding: 0 2rem;
}
.nav__logo { flex-shrink: 0; }
.nav__logo img { height: 80px; width: auto; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav__links a {
  color: rgba(255,255,255,.85);
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
  transition: color var(--transition);
}
.nav__links a:hover,
.nav__links a.active { color: var(--teal); }

.nav__register .btn {
  font-size: .82rem;
  padding: .6rem 1.4rem;
}

/* ── Tighten link spacing as viewport narrows before hamburger kicks in */
.nav__links a { white-space: nowrap; }

@media (max-width: 1280px) {
  .nav__links { gap: 1.1rem; }
  .nav__links a { font-size: .75rem; }
  .nav__register .btn { font-size: .78rem; padding: .55rem 1.1rem; }
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block; width: 26px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile nav */
.nav__mobile {
  display: none;
  background: var(--navy);
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,.1);
}
.nav__mobile.open { display: block; }
.nav__mobile a {
  display: block;
  color: rgba(255,255,255,.85);
  font-size: .9rem;
  font-weight: 500;
  padding: .65rem 0;
  border-bottom: 1px solid rgba(255,255,255,.07);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.nav__mobile a:last-child { border-bottom: none; }
.nav__mobile a:hover { color: var(--teal); }
.nav__mobile .btn { margin-top: 1rem; width: 100%; text-align: center; }

/* ========================================
   HERO
   ======================================== */
.hero {
  background: url('../images/houston-hero.jpg') center center / cover no-repeat;
  padding: 6rem 0 5rem;
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 18, 40, 0.52) 0%,
    rgba(15, 28, 60, 0.62) 50%,
    rgba(10, 18, 40, 0.72) 100%
  );
  pointer-events: none;
}
.hero > .container { position: relative; z-index: 1; }
.hero__eyebrow {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}
.hero h1 {
  color: var(--white);
  margin-bottom: .75rem;
  text-shadow: 0 2px 16px rgba(0,0,0,.55);
}
.hero h1 span { color: var(--teal); }

.hero__meta {
  font-size: 1rem;
  color: rgba(255,255,255,.9);
  font-weight: 500;
  margin-bottom: 2.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  text-shadow: 0 1px 8px rgba(0,0,0,.5);
}
.hero__meta .sep { color: var(--teal); }

/* ── Countdown ── */
.countdown {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 2.5rem 0;
  flex-wrap: wrap;
}
.countdown__unit {
  background: rgba(10, 18, 40, 0.55);
  border: 1px solid rgba(84,198,220,.4);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  min-width: 90px;
  text-align: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.countdown__number {
  display: block;
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--teal);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.countdown__label {
  display: block;
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.6);
  margin-top: .35rem;
}

/* ========================================
   CARDS / INFO BLOCKS
   ======================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow);
  border-top: 4px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(33,52,103,.14);
}
.card--teal  { border-top-color: var(--teal); }
.card--navy  { border-top-color: var(--navy); }
.card--steel { border-top-color: var(--steel); }

.card__icon {
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
}
.card__icon--teal  { background: rgba(84,198,220,.12); color: var(--teal); }
.card__icon--navy  { background: rgba(33,52,103,.08);  color: var(--navy); }

.card h3 { margin-bottom: .5rem; color: var(--navy); }
.card p   { color: var(--gray); margin-bottom: 1.25rem; font-size: .93rem; }
.card .btn { font-size: .82rem; }

/* ========================================
   SECTION HEADERS
   ======================================== */
.section-header { margin-bottom: 3rem; text-align: center; }
.section-header h2 { color: var(--navy); }

/* ── Light / Dark sections ── */
.section--light { background: var(--light); }
.section--dark  { background: var(--navy); color: var(--white); }
.section--dark h2 { color: var(--white); }
.section--dark .divider { background: var(--teal); }
.section--dark p { color: rgba(255,255,255,.8); }

/* ========================================
   HOME STRIPS
   ======================================== */
.strip {
  padding: 5rem 0;
  border-bottom: 1px solid #eaeff5;
}
.strip:last-of-type { border-bottom: none; }
.strip--alt { background: var(--light); }
.strip--dark { background: var(--navy); border-bottom: none; }

.strip__inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2.5rem 4rem;
  align-items: start;
}

.strip__label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: .6rem;
}
.strip__title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
}
.strip--dark .strip__title { color: var(--white); }

.strip__accent {
  width: 3px;
  align-self: stretch;
  background: var(--teal);
  border-radius: 2px;
  display: none; /* shown via JS on wider screens */
}

.strip__body p {
  color: var(--gray);
  font-size: .95rem;
  max-width: 580px;
  margin-bottom: 1.5rem;
}
.strip--dark .strip__body p { color: rgba(255,255,255,.75); }

.strip__cta { flex-shrink: 0; }

@media (max-width: 820px) {
  .strip__inner {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .strip__cta { justify-self: start; }
}

/* ========================================
   SPEAKERS GRID
   ======================================== */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 1.75rem 1.25rem;
  margin-top: 2.5rem;
}
.speaker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.speaker-card__photo {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 3px solid var(--teal);
  margin-bottom: .75rem;
  box-shadow: 0 4px 16px rgba(33,52,103,.15);
  transition: transform .25s ease, box-shadow .25s ease;
}
.speaker-card:hover .speaker-card__photo {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(33,52,103,.2);
}
.speaker-card__name {
  font-size: .8rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: .2rem;
}
.speaker-card__cred {
  font-size: .72rem;
  color: var(--gray);
  font-weight: 500;
}

/* ── Speaker Bio Hover Card ── */
.speaker-card {
  position: relative;
}
.speaker-bio {
  display: none;
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: 0 8px 32px rgba(0,0,0,.3);
  z-index: 50;
  pointer-events: none;
}
.speaker-bio::after {
  content: '';
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-top-color: var(--navy);
}
.speaker-bio__name {
  font-size: .8rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: .5rem;
}
.speaker-bio__text {
  font-size: .75rem;
  line-height: 1.55;
  color: rgba(255,255,255,.85);
}
.speaker-card:hover .speaker-bio,
.speaker-card.bio-open .speaker-bio {
  display: block;
}
/* keep bio on screen near edges */
@media (max-width: 600px) {
  .speaker-bio {
    left: 0; transform: none;
    width: 230px;
  }
  .speaker-bio::after { left: 48px; }
}

/* ── Session summary line ── */
.agenda-session__summary {
  font-size: .78rem;
  color: var(--gray);
  font-style: italic;
  padding: .5rem 1.25rem .6rem;
  border-bottom: 1px solid #f0f4f8;
  background: var(--white);
}

/* ========================================
   AGENDA PAGE
   ======================================== */
.agenda-disclaimer {
  background: rgba(84,198,220,.1);
  border-left: 4px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  margin-bottom: 2.5rem;
  font-size: .88rem;
  color: var(--navy);
  font-weight: 500;
}

.agenda-day {
  margin-bottom: 3.5rem;
}
.agenda-day__title {
  background: var(--navy);
  color: var(--white);
  padding: .75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.agenda-block {
  margin-bottom: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid #e8eef5;
}

.agenda-block--break {
  background: var(--light);
  border-color: transparent;
  padding: .75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.agenda-block--break .time {
  font-size: .8rem;
  font-weight: 700;
  color: var(--gray);
  white-space: nowrap;
  min-width: 110px;
}
.agenda-block--break .label {
  font-size: .88rem;
  color: var(--gray);
  font-weight: 500;
}

.agenda-session {
  background: var(--white);
}
.agenda-session__header {
  background: rgba(33,52,103,.06);
  padding: .85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: .75rem;
  border-bottom: 1px solid #e8eef5;
  cursor: pointer;
  user-select: none;
}
.agenda-session__header:hover {
  background: rgba(33,52,103,.10);
}
.agenda-session__badge {
  background: var(--navy);
  color: var(--white);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .25rem .65rem;
  border-radius: 20px;
  white-space: nowrap;
}
.agenda-session__title {
  font-weight: 700;
  font-size: .93rem;
  color: var(--navy);
}
.agenda-session__moderator {
  font-size: .78rem;
  color: var(--gray);
  margin-left: auto;
  white-space: nowrap;
}

.agenda-talk {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: .5rem 1rem;
  padding: .9rem 1.25rem;
  border-bottom: 1px solid #f0f4f8;
  align-items: start;
}
.agenda-talk:last-child { border-bottom: none; }
.agenda-talk__time {
  font-size: .78rem;
  font-weight: 600;
  color: var(--teal);
  padding-top: .1rem;
  white-space: nowrap;
}
.agenda-talk__title {
  font-size: .88rem;
  font-weight: 600;
  color: var(--black);
  line-height: 1.4;
}
.agenda-talk__speaker {
  font-size: .78rem;
  color: var(--gray);
  margin-top: .2rem;
}

.agenda-special {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: .5rem 1rem;
  padding: .9rem 1.25rem;
  background: rgba(84,198,220,.06);
  border-top: 2px solid var(--teal);
  align-items: start;
}
.agenda-special__time {
  font-size: .78rem;
  font-weight: 700;
  color: var(--teal);
  white-space: nowrap;
}
.agenda-special__title {
  font-size: .9rem;
  font-weight: 700;
  color: var(--navy);
}
.agenda-special__sub {
  font-size: .8rem;
  color: var(--gray);
  margin-top: .2rem;
}

/* Roundtable */
.roundtable-topics {
  margin-top: .5rem;
  padding-left: .5rem;
}
.roundtable-topics li {
  font-size: .8rem;
  color: var(--gray);
  padding: .15rem 0;
}
.roundtable-topics li::before {
  content: '–  ';
  color: var(--teal);
  font-weight: 700;
}

/* ========================================
   SUBMISSIONS PAGE
   ======================================== */
.tracks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.track {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.track__header {
  padding: 0;
  color: var(--white);
  position: relative;
  overflow: hidden;
  height: 200px;
  display: flex;
  align-items: flex-end;
}
.track__header-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform .4s ease;
}
.track:hover .track__header-bg { transform: scale(1.04); }
.track__header-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,18,40,.70) 0%, rgba(10,18,40,.22) 100%);
}
.track__header-text {
  position: relative; z-index: 1;
  padding: 1.5rem;
}
.track--science .track__header-bg { background-image: url('../images/research.jpg'); }
.track--art     .track__header-bg { background-image: url('../images/arabic_art.jpg'); }

.track__header h3 { color: var(--white); margin-bottom: .25rem; font-size: 1.2rem; }
.track__header p  { color: rgba(255,255,255,.8); font-size: .85rem; margin: 0; }

.track__body {
  padding: 1.75rem;
  background: var(--white);
  border: 1px solid #e8eef5;
  border-top: none;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.track__body .btn { margin-top: auto; width: 100%; text-align: center; padding-top: 1rem; }

.track__body h4 { color: var(--navy); margin-bottom: .75rem; font-size: .88rem; text-transform: uppercase; letter-spacing: .06em; }

.track__list { margin-bottom: 1.5rem; }
.track__list li {
  font-size: .88rem;
  color: var(--gray);
  padding: .3rem 0;
  padding-left: 1rem;
  position: relative;
}
.track__list li::before {
  content: '';
  position: absolute; left: 0; top: .65rem;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--teal);
}

/* Dates bar */
.dates-bar {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 2.5rem 0;
}
.date-item {
  flex: 1;
  min-width: 200px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--teal);
}
.date-item__label {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--gray);
  margin-bottom: .25rem;
}
.date-item__date {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
}

/* ========================================
   HOTEL PAGE
   ======================================== */
.hotel-hero {
  background: url('../images/hotel-hero.jpg') center center / cover no-repeat;
  color: var(--white);
  padding: 6rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hotel-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 18, 40, 0.55) 0%,
    rgba(10, 18, 40, 0.70) 100%
  );
  pointer-events: none;
}
.hotel-hero > .container { position: relative; z-index: 1; }
.hotel-hero h1 { color: var(--white); text-shadow: 0 2px 16px rgba(0,0,0,.55); }
.hotel-hero p  { color: rgba(255,255,255,.85); max-width: 560px; margin: 1rem auto 0; text-shadow: 0 1px 8px rgba(0,0,0,.4); }

.amenities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}
.amenity {
  display: flex;
  align-items: flex-start;
  gap: .85rem;
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--teal);
}
.amenity__icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: .1rem;
}
.amenity__text strong {
  display: block;
  font-size: .88rem;
  color: var(--navy);
  margin-bottom: .2rem;
}
.amenity__text span {
  font-size: .8rem;
  color: var(--gray);
}

.hotel-cta {
  background: var(--navy);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--white);
  margin-top: 3rem;
}
.hotel-cta h3 { color: var(--white); margin-bottom: .75rem; }
.hotel-cta p { color: rgba(255,255,255,.75); margin-bottom: 1.5rem; font-size: .93rem; }
.hotel-cta .btn { margin: .4rem; }

/* ========================================
   PAGE HERO (inner pages)
   ======================================== */
.page-hero {
  padding: 5rem 0;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
  background: var(--navy);
}
.page-hero__bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
}
.page-hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(10,18,40,.45) 0%, rgba(10,18,40,.62) 100%);
}
.page-hero > .container { position: relative; z-index: 1; }
.page-hero h1 { color: var(--white); font-size: 2.2rem; text-shadow: 0 2px 16px rgba(0,0,0,.5); }
.page-hero p  { color: rgba(255,255,255,.85); margin-top: .5rem; font-size: 1rem; text-shadow: 0 1px 8px rgba(0,0,0,.4); }

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: #0e1e3f;
  color: rgba(255,255,255,.65);
  padding: 3rem 0 1.5rem;
}
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__brand img { height: 80px; margin-bottom: 1rem; }
.footer__brand p   { font-size: .82rem; line-height: 1.7; max-width: 280px; }

.footer__col h4 {
  color: var(--white);
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 1rem;
}
.footer__col a {
  display: block;
  font-size: .82rem;
  color: rgba(255,255,255,.6);
  padding: .25rem 0;
  transition: color var(--transition);
}
.footer__col a:hover { color: var(--teal); }

.footer__bottom {
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem;
  font-size: .78rem;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
  :root { --h1: 2.2rem; --h2: 1.7rem; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

/* Nav collapses to hamburger at 1100px so all 5 links always fit */
@media (max-width: 1100px) {
  .nav__links, .nav__register { display: none; }
  .nav__toggle { display: flex; }
}

@media (max-width: 680px) {
  :root { --h1: 1.8rem; --h2: 1.5rem; --h3: 1.2rem; }

  section { padding: 3.5rem 0; }

  .countdown__unit { min-width: 70px; padding: 1rem 1.1rem; }
  .countdown__number { font-size: 2rem; }

  .footer__inner { grid-template-columns: 1fr; gap: 2rem; }

  .agenda-talk {
    grid-template-columns: 1fr;
    gap: .25rem;
  }
  .agenda-talk__time { font-size: .72rem; }

  .agenda-special { grid-template-columns: 1fr; gap: .25rem; }

  .dates-bar { flex-direction: column; }
}

@media (max-width: 420px) {
  .countdown { gap: .6rem; }
  .countdown__unit { min-width: 60px; padding: .85rem .8rem; }
  .countdown__number { font-size: 1.7rem; }
}

/* ========================================
   ACCORDION – Collapsible Sessions
   ======================================== */
.agenda-session__toggle {
  margin-left: auto;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray);
  transition: transform .25s ease;
}
.agenda-session__toggle svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.agenda-session__header[aria-expanded="false"] .agenda-session__toggle {
  transform: rotate(-90deg);
}
.agenda-session__body {
  transition: max-height .3s ease;
}
.agenda-session__body.collapsed {
  display: none;
}
/* When moderator exists, toggle stays right regardless */
.agenda-session__moderator { margin-left: auto; }
.agenda-session__header .agenda-session__moderator + .agenda-session__toggle {
  margin-left: .5rem;
}

/* ========================================
   CONCURRENT TRACKS – Day 3
   ======================================== */
.concurrent-note {
  background: rgba(84,198,220,.08);
  border-left: 4px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: .85rem 1.1rem;
  font-size: .82rem;
  color: var(--navy);
  margin-bottom: 1.25rem;
}

.concurrent-wrapper {
  margin-bottom: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid #e0e8f0;
}
.concurrent-label {
  background: var(--navy);
  color: var(--white);
  padding: .6rem 1.25rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.concurrent-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
}
.concurrent-track {
  border-right: 1px solid #e0e8f0;
}
.concurrent-track:last-child { border-right: none; }
.concurrent-track__header {
  padding: .6rem 1rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  text-align: center;
  border-bottom: 2px solid #e0e8f0;
  background: rgba(33,52,103,.04);
}
.concurrent-track--main   .concurrent-track__header { border-bottom-color: var(--navy); color: var(--navy); }
.concurrent-track--nextgen .concurrent-track__header { border-bottom-color: var(--teal); color: var(--teal); }
.concurrent-track--dental  .concurrent-track__header { border-bottom-color: var(--steel); color: var(--steel); }

.concurrent-track__body { padding: .85rem 1rem; }
.concurrent-track__body .agenda-block {
  margin-bottom: .75rem;
}
.concurrent-track__tba {
  font-size: .78rem;
  color: var(--gray);
  font-style: italic;
  text-align: center;
  padding: 1.5rem .5rem;
  line-height: 1.5;
}
.concurrent-track__item {
  padding: .6rem 0;
  border-bottom: 1px solid #f0f4f8;
}
.concurrent-track__item:last-child { border-bottom: none; }
.concurrent-track__time {
  font-size: .7rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: .15rem;
}
.concurrent-track__title {
  font-size: .78rem;
  font-weight: 600;
  color: var(--black);
  line-height: 1.35;
}
.concurrent-track__speaker {
  font-size: .72rem;
  color: var(--gray);
  margin-top: .1rem;
}

@media (max-width: 820px) {
  .concurrent-grid { grid-template-columns: 1fr; }
  .concurrent-track { border-right: none; border-bottom: 1px solid #e0e8f0; }
  .concurrent-track:last-child { border-bottom: none; }
}

/* ========================================
   COMMITTEE / LEADERSHIP PAGE
   ======================================== */
.committee-section {
  margin-bottom: 4rem;
}
.committee-section__heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: .5rem;
}
.committee-section__heading h2 { color: var(--navy); }
.committee-section .divider-left { margin: .75rem 0 2rem; }

.committee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1.5rem;
}
.committee-grid--chair-featured {
  grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
}

.committee-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem 1.25rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform .25s, box-shadow .25s;
  border-top: 3px solid var(--teal);
}
.committee-card--chair { border-top-color: var(--navy); }
.committee-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(33,52,103,.14);
}
.committee-card__photo {
  width: 90px; height: 90px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 3px solid var(--teal);
  margin-bottom: .9rem;
  box-shadow: 0 4px 16px rgba(33,52,103,.15);
}
.committee-card--chair .committee-card__photo { border-color: var(--navy); }
.committee-card__initials {
  width: 90px; height: 90px;
  border-radius: 50%;
  background: var(--light);
  border: 3px solid var(--teal);
  margin-bottom: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .03em;
}
.committee-card--chair .committee-card__initials {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}
.committee-card__name {
  font-size: .83rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: .2rem;
}
.committee-card__cred {
  font-size: .7rem;
  color: var(--gray);
  font-weight: 500;
  margin-bottom: .55rem;
}
.committee-card__role {
  display: inline-block;
  background: rgba(84,198,220,.13);
  color: var(--navy);
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .2rem .6rem;
  border-radius: 20px;
  margin-bottom: .85rem;
}
.committee-card--chair .committee-card__role {
  background: var(--navy);
  color: var(--white);
}
.committee-card__bio {
  font-size: .75rem;
  color: var(--gray);
  line-height: 1.55;
  text-align: left;
  flex: 1;
}

@media (max-width: 900px) {
  .committee-grid--chair-featured { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .committee-grid { grid-template-columns: repeat(2, 1fr); }
  .committee-grid--chair-featured { grid-template-columns: repeat(2, 1fr); }
}

/* ========================================
   DEADLINE BANNER – Submissions Page
   ======================================== */
.deadline-banner {
  background: var(--navy);
  border-radius: var(--radius);
  padding: 1.4rem 1.75rem;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: 0 4px 20px rgba(33,52,103,.18);
}
.deadline-banner__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(84,198,220,.18);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--teal);
}
.deadline-banner__icon svg { width: 22px; height: 22px; }
.deadline-banner__content { flex: 1; min-width: 0; }
.deadline-banner__heading {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: .7rem;
}
.deadline-banner__dates {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.deadline-sep {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,.15);
  flex-shrink: 0;
}
.deadline-item { flex-shrink: 0; }
.deadline-item__label {
  font-size: .68rem;
  color: rgba(255,255,255,.55);
  font-weight: 500;
  margin-bottom: .15rem;
  white-space: nowrap;
}
.deadline-item__date {
  font-size: .95rem;
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}
.deadline-item--urgent .deadline-item__date { color: var(--teal); font-size: 1rem; }

@media (max-width: 680px) {
  .deadline-banner { flex-direction: column; align-items: flex-start; gap: .85rem; }
  .deadline-banner__dates { flex-direction: column; gap: .75rem; }
  .deadline-sep { display: none; }
}

/* ── NextGen track topic list ── */
.nextgen-topics {
  list-style: none;
  margin-top: .35rem;
}
.nextgen-topics li {
  font-size: .69rem;
  color: var(--gray);
  padding: .18rem 0 .18rem .85rem;
  position: relative;
  line-height: 1.4;
}
.nextgen-topics li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .52rem;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--teal);
}