/*
 * ELTAN Conference Portal Styles
 * Polished, modern visuals aligned with site theme
 */

:root {
  --conf-hero-overlay: linear-gradient(180deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.35) 35%, rgba(255,255,255,0) 100%);
}

.conf-hero {
  position: relative;
  min-height: 70vh;
  display: grid;
  place-items: center;
  color: var(--color-white);
  overflow: hidden;
}

.conf-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--conf-hero-overlay);
  z-index: 1;
}

.conf-hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.9);
  transform: scale(1.05);
}

.conf-hero__content {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: left;
}

.conf-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem 1rem;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 9999px;
  backdrop-filter: blur(6px);
  margin-bottom: var(--spacing-sm);
}

.conf-hero__title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  margin: 0 0 .25rem 0;
}

.conf-hero__meta {
  font-size: 1.05rem;
  opacity: .95;
}

.conf-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: var(--spacing-md);
}

.btn-pill {
  border-radius: 9999px;
  padding: .75rem 1.25rem;
}

.conf-subnav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,.75);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gray-200);
}

.conf-subnav .container {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
}

.conf-subnav a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1rem;
  color: var(--color-gray-700);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.conf-subnav a.active,
.conf-subnav a:hover {
  color: var(--eltan-orange);
  border-color: var(--eltan-orange);
}

.conf-section {
  padding: var(--spacing-3xl) 0;
}

.conf-section__header {
  margin-bottom: var(--spacing-xl);
}

.conf-kicker {
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--eltan-orange);
  margin-bottom: .25rem;
}

.conf-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
}

/* Speaker Grid Layout - Display speakers side by side */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

@media (max-width: 992px) {
  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (max-width: 576px) {
  .speakers-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.speaker-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}

.speaker-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2xl); }

/* Large, prominent speaker images - 70% visible from top */
.speaker-card__img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

.speaker-card__body { padding: 1.5rem; }
.speaker-card__name { font-weight: 700; font-size: 1.125rem; margin: .25rem 0; }
.speaker-card__meta { color: var(--color-gray-600); font-size: .95rem; line-height: 1.5; }

.timeline { display: grid; gap: 1rem; }
.timeline-item { display: grid; grid-template-columns: 56px 1fr; gap: 1rem; align-items: start; }
.timeline-time { text-align: center; background: var(--color-gray-100); border-radius: var(--radius-md); padding: .5rem; font-weight: 700; color: var(--eltan-blue); }
.timeline-card { background: var(--color-white); border-radius: var(--radius-lg); padding: 1rem; box-shadow: var(--shadow-sm); }
.timeline-title { font-weight: 700; margin: 0 0 .25rem 0; }
.timeline-meta { color: var(--color-gray-600); font-size: .9rem; }

.sponsor-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; align-items: center; }
.sponsor-logo { max-height: 64px; object-fit: contain; filter: grayscale(0%); opacity: .95; }

.loc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.loc-card { background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); overflow: hidden; }
.loc-img { width: 100%; height: 180px; object-fit: cover; display: block; }
.loc-body { padding: 1rem; }
.loc-name { font-weight: 700; margin: 0 0 .25rem 0; }
.loc-role { color: var(--color-gray-600); margin-bottom: .5rem; }

.floating-cta {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 15;
}

.floating-cta .btn { box-shadow: var(--shadow-xl); }

@media (max-width: 768px) {
  .speaker-card__img { height: 350px; }
  .timeline-item { grid-template-columns: 1fr; }
  .timeline-time { width: max-content; }
}

/* Overview grid: description (left) + registration card (right) */
.overview-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}
@media (max-width: 992px) {
  .overview-grid { grid-template-columns: 1fr; }
}

/* Tabs */
.conf-tabs {
  background: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 9;
  border-bottom: 1px solid var(--color-gray-200);
}
.conf-tabs .container { display:flex; gap:.5rem; overflow-x:auto; }
.conf-tab {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  border: 0;
  padding: .9rem 1rem;
  font-weight: 600;
  color: var(--color-gray-700);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease;
}
.conf-tab:hover { color: var(--eltan-orange); }
.conf-tab.active { color: var(--eltan-orange); border-color: var(--eltan-orange); }
.conf-tab .material-icons { font-size: 18px; margin-right: .35rem; vertical-align: -4px; }

.conf-tabpanel { display: none; padding: var(--spacing-2xl) 0; }
.conf-tabpanel.active { display: block; }
.conf-tabpanel:target { display: block; }

/* Buttons (consistent, pill style) */
.btn { display:inline-flex; align-items:center; justify-content:center; gap:.5rem; padding:.75rem 1.25rem; border-radius: var(--radius-full); font-weight:600; text-decoration:none; cursor:pointer; border:2px solid transparent; transition: all .25s ease; }
.btn-primary { background: var(--eltan-orange); color: var(--color-white); }
.btn-primary:hover { background: var(--eltan-orange-dark); }
.btn-secondary { background: var(--color-white); color: var(--eltan-orange); border-color: var(--eltan-orange); }
.btn-secondary:hover { background: var(--eltan-orange); color: var(--color-white); }
.btn-outline-primary { background: transparent; color: var(--eltan-orange); border-color: var(--eltan-orange); }
.btn-outline-primary:hover { background: var(--eltan-orange); color: var(--color-white); }
.btn-pill { border-radius: 9999px; }

/* Registration card */
.conf-reg-card { position: sticky; top: 88px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); background: var(--color-white); padding: 1.25rem; }
.conf-reg-card h3 { margin: 0 0 .5rem 0; }
.conf-reg-list { list-style: none; padding: 0; margin: .75rem 0 1rem 0; display:grid; gap:.25rem; }
.conf-reg-list li { padding:.35rem 0; color: var(--color-gray-800); }
.conf-badge-info { display:flex; gap:.75rem; align-items:flex-start; padding: .75rem 1rem; background: #E6F0FF; border-left: 4px solid #1565C0; border-radius: var(--radius-md); }