body {
  font-family: 'Roboto', sans-serif;
  color: #555;
}

p {
  text-align: justify;
}

h3 {
  text-align: center;
}

.mail,
.mail:visited {
  color: #f37022;
}
.mail:hover,
.mail:focus {
  color: #e35e1f;
}

.navbar {
  background-color: transparent;
  padding: 1.5rem 0;
  transition: all 0.3s ease;
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
}

.navbar.scrolled {
  background-color: rgba(8, 100, 100, 0.15) !important;
  padding: 1rem 0;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: #fff;
  transition: all 0.3s ease;
}

.navbar-brand:hover {
  color: #f37022;
  transform: translateY(-2px);
}

.navbar .nav-link {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9) !important;
  margin: 0 0.5rem;
  padding: 0.5rem 1rem !important;
  border-radius: 50px;
  transition: all 0.3s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus {
  color: #fff !important;
  background-color: rgba(243, 112, 34, 0.15);
  transform: translateY(-2px);
}

.navbar .btn-outline-light {
  border-color: #f37022;
  color: #f37022;
  border-radius: 50px;
  padding: 0.5rem 1.5rem;
  transition: all 0.3s ease;
}

.navbar .btn-outline-light:hover,
.navbar .btn-outline-light:focus {
  background-color: #f37022;
  color: #fff;
  border-color: #f37022;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(243, 112, 34, 0.2);
}

.navbar-toggler {
  border: none;
  padding: 0.5rem;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  position: relative;
  transition: all 0.3s ease;
}

.navbar-toggler:focus {
  box-shadow: none;
  background-color: rgba(255, 255, 255, 0.1);
}

.navbar-toggler-icon {
  background-image: none;
  position: relative;
  width: 24px;
  height: 2px;
  background-color: #fff;
  transition: all 0.3s ease;
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: #fff;
  transition: all 0.3s ease;
}

.navbar-toggler-icon::before {
  transform: translateY(-8px);
}

.navbar-toggler-icon::after {
  transform: translateY(8px);
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
  background-color: transparent;
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
  transform: rotate(45deg);
}

.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::after {
  transform: rotate(-45deg);
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    background-color: rgba(8, 100, 100, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin: 1rem -1rem -1rem;
    padding: 1rem;
    border-radius: 1rem;
  }
  
  .navbar .nav-link {
    margin: 0.25rem 0;
  }
}

.hero-section {
  position: relative;
  height: 50vh;
  background: url('images/banner_background.jpg') no-repeat center center/cover;
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(8, 100, 100, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 100px;
}
.hero-title {
  font-family: 'Poppins', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
}
.hero-subtitle {
  font-size: 1.25rem;
  color: #ddd;
  margin-bottom: 2rem;
}

.btn-primary,
.btn-primary:visited {
  background-color: #f37022;
  border-color: #f37022;
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus {
  background-color: #e35e1f;
  border-color: #e35e1f;
}

.section-header h2 {
  font-family: 'Poppins', sans-serif;
  font-size: 2.25rem;
  color: #086464;
  margin-bottom: 1rem;
}

#details-en {
  background: url('images/Berlin.png') no-repeat center center;
  background-size: cover;
}

.event-details {
  text-align: justify;
}
.event-details li {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

/* Modern Timetable Grid Schedule */
#schedule-en {
  background: #b0dcd4;
  position: relative;
  overflow: visible;
  padding: 4rem 0;
  z-index: 10;
}

.schedule-container {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
  z-index: 11;
  overflow: visible;
}

.schedule-timetable {
  background: rgba(255, 255, 255, 0.98);
  border-radius: 16px;
  overflow: visible;
  box-shadow: 0 8px 32px rgba(8, 100, 100, 0.15);
  border: 1px solid rgba(8, 100, 100, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin-top: 2rem;
  width: 100%;
  position: relative;
  z-index: 12;
}

.schedule-grid {
  display: grid;
  grid-template-columns: auto repeat(10, minmax(120px, 1fr));
  gap: 1px;
  background: rgba(8, 100, 100, 0.1);
  width: 100%;
  position: relative;
  z-index: 13;
  min-width: 1200px; /* Minimum width to prevent squeezing */
  overflow: visible;
}

.time-header {
  background: #086464;
  color: white;
  padding: 0.5rem 0.25rem;
  font-weight: 600;
  font-size: 0.85rem;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  word-break: break-word;
  hyphens: auto;
}

.time-header.corner {
  background: #064545;
  font-size: 0.75rem;
  font-weight: 500;
}

.day-label {
  background: rgba(8, 100, 100, 0.08);
  padding: 0.75rem 0.5rem;
  font-weight: 600;
  color: #086464;
  border-right: 2px solid rgba(8, 100, 100, 0.1);
  position: sticky;
  left: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 90px;
}

.day-number {
  background: #086464;
  color: white;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.day-name {
  font-size: 0.9rem;
  font-family: 'Poppins', sans-serif;
}

.session-cell {
  position: relative;
  background: white;
  padding: 0.35rem;
  min-height: 80px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  cursor: pointer;
  z-index: 14;
}

.session-cell:hover {
  background: rgba(8, 100, 100, 0.03);
  border-color: rgba(8, 100, 100, 0.2);
  transform: scale(1.02);
  z-index: 1000;
}

.session-cell.empty {
  background: rgba(8, 100, 100, 0.02);
  cursor: default;
}

.session-cell.empty:hover {
  transform: none;
  box-shadow: none;
}

.session-cell.break {
  background: rgba(8, 100, 100, 0.05);
  border-left: 3px solid #086464;
}

.session-cell.plenary {
  background: rgba(243, 112, 34, 0.05);
  border-left: 3px solid #f37022;
}

.session-cell.hands-on {
  background: rgba(8, 100, 100, 0.08);
  border-left: 3px solid #086464;
}

.session-cell.talk {
  background: rgba(255, 255, 255, 1);
  border-left: 3px solid #0a7575;
}

.session-cell.special {
  background: rgba(139, 69, 19, 0.08);
  border-left: 3px solid #8B4513;
}

.session-cell.special .session-title {
  color: #8B4513;
  font-weight: 700;
}

.session-content {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.session-title {
  font-weight: 600;
  font-size: 0.8rem;
  color: #086464;
  margin-bottom: 0.25rem;
  line-height: 1.2;
  word-break: break-word;
  hyphens: auto;
}

.session-speaker {
  font-size: 0.7rem;
  color: #666;
  line-height: 1.3;
  display: none; /* Hide speakers by default */
}

.session-cell.break .session-title {
  color: #666;
  font-style: italic;
  font-weight: 500;
}

.session-cell.plenary .session-title {
  color: #f37022;
  font-weight: 700;
}

/* Multi-column spanning sessions */
.session-cell.span-2 {
  grid-column: span 2;
}

.session-cell.span-3 {
  grid-column: span 3;
}

.session-cell.span-4 {
  grid-column: span 4;
  background: white;
}

.session-cell.span-4 .session-title {
  text-align: center;
  font-weight: 600;
}

/* Responsive Design */
@media (max-width: 1200px) {
  .time-header {
    font-size: 0.75rem;
    padding: 0.5rem 0.15rem;
  }
  
  .session-title {
    font-size: 0.75rem;
  }
  
  .session-speaker {
    font-size: 0.65rem;
  }
}

@media (max-width: 768px) {
  .schedule-grid {
    gap: 0.5px;
  }
  
  .time-header {
    font-size: 0.65rem;
    padding: 0.25rem 0.1rem;
    min-height: 50px;
  }
  
  .day-label {
    padding: 0.5rem 0.25rem;
    min-width: 70px;
    font-size: 0.75rem;
  }
  
  .session-cell {
    padding: 0.25rem;
    min-height: 60px;
  }
  
  .session-title {
    font-size: 0.7rem;
  }
}

@media (max-width: 480px) {
  .schedule-container {
    padding: 0 0.5rem;
  }
  
  .time-header {
    font-size: 0.6rem;
  }
  
  .day-label {
    min-width: 60px;
    font-size: 0.7rem;
  }
  
  .session-title {
    font-size: 0.65rem;
  }
  
  .session-cell {
    padding: 0.2rem;
    min-height: 50px;
  }
}

.logos-section {
  position: relative;
}

.logos-section .logo {
  width: 100%;
  padding-bottom: 100%;
  overflow: hidden;
  position: relative;
}

.logos-section .logo img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 60%;
  max-height: 60%;
}

footer {
  background-color: #212529;
  color: #fff;
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  .logos-section .col-md-6:first-child {
    padding-right: 2rem;
  }
  .logos-section .col-md-6:last-child {
    padding-left: 2rem;
  }
}

@media (max-width: 768px) {
  .hero-section {
    height: 100vh;
  }
}

/* Popover Styles */
.session-popover {
  position: absolute;
  background: white;
  border: 1px solid rgba(8, 100, 100, 0.2);
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 8px 24px rgba(8, 100, 100, 0.2);
  z-index: 9999;
  min-width: 250px;
  max-width: 300px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 0.85rem;
  line-height: 1.4;
}

/* Adjust popover positioning */
.session-cell[data-position="top"] .session-popover {
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 5px;
}

.session-cell[data-position="bottom"] .session-popover {
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 5px;
}

.session-cell[data-position="left"] .session-popover {
  right: 100%;
  top: 0;
  transform: translateY(0);
  margin-right: 5px;
}

.session-cell[data-position="right"] .session-popover {
  left: calc(100% + 5px);
  top: 0;
  transform: none;
}

/* Add hover states */
.session-cell:hover .session-popover {
  opacity: 1;
  visibility: visible;
  z-index: 9999;
}

/* Special handling for last row popovers */
.schedule-grid > :nth-last-child(-n+11) {
  position: relative;
}

.schedule-grid > :nth-last-child(-n+11) .session-popover {
  bottom: 100%;
  top: auto;
  left: 50%;
  right: auto;
  transform: translateX(-50%);
  margin: 0 0 5px 0;
}

/* Handle edge cases for rightmost columns in last row */
.schedule-grid > :nth-last-child(-n+3) .session-popover {
  left: auto;
  right: 0;
  transform: none;
}

/* Ensure last row popovers are always on top */
.schedule-grid > :nth-last-child(-n+11):hover {
  z-index: 9998;
}

.schedule-grid > :nth-last-child(-n+11):hover .session-popover {
  z-index: 9999;
}

/* Remove any transform on hover for last row */
.schedule-grid > :nth-last-child(-n+11):hover {
  transform: none;
}

/* Adjust content styles for better fit */
.popover-title {
  font-weight: 700;
  color: #086464;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #f37022;
}

.popover-time {
  background: #f37022;
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.popover-speakers {
  color: #555;
  font-size: 0.8rem;
}

.popover-speakers ul {
  margin: 0.5rem 0 0 0;
  padding-left: 1rem;
  list-style-type: disc;
}

.popover-speakers li {
  margin-bottom: 0.4rem;
  line-height: 1.3;
}

.popover-description {
  color: #666;
  font-style: italic;
  margin-top: 0.4rem;
  font-size: 0.8rem;
}

/* Enhanced popover styles for longer content */
.popover-description p {
  margin-bottom: 0.5rem;
}

.popover-description ul {
  margin: 0.5rem 0;
  padding-left: 1.2rem;
  list-style-type: disc;
}

.popover-description li {
  margin-bottom: 0.3rem;
  font-size: 0.8rem;
  color: #555;
}

/* Add media queries for responsive popovers */
@media (max-width: 768px) {
  .session-popover {
    min-width: 200px;
    max-width: 250px;
    font-size: 0.8rem;
    padding: 0.75rem;
  }
  
  .popover-title {
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
  }
  
  .popover-time {
    font-size: 0.7rem;
    padding: 0.2rem 0.4rem;
  }
  
  .popover-speakers {
    font-size: 0.75rem;
  }
  
  .popover-description {
    font-size: 0.75rem;
  }
}

#about-en {
  position: relative;
  z-index: 1;
}

/* Schedule Summary Styles */
.schedule-summary {
  background: transparent;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  position: relative;
  z-index: 5;
}

/* Accordion Styles */
.accordion {
  --bs-accordion-border-color: rgba(8, 100, 100, 0.2);
  --bs-accordion-border-radius: 8px;
}

.accordion-item {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(8, 100, 100, 0.15) !important;
  margin-bottom: 0.5rem;
  border-radius: 8px !important;
  overflow: hidden;
}

.accordion-item:last-child {
  margin-bottom: 0;
}

.accordion-button {
  background: rgba(8, 100, 100, 0.05) !important;
  color: #086464 !important;
  font-weight: 600 !important;
  border: none !important;
  box-shadow: none !important;
  padding: 1rem 1.25rem;
  transition: all 0.3s ease;
}

.accordion-button:not(.collapsed) {
  background: rgba(8, 100, 100, 0.1) !important;
  color: #086464 !important;
  box-shadow: none !important;
}

.accordion-button:hover {
  background: rgba(8, 100, 100, 0.08) !important;
}

.accordion-button:focus {
  box-shadow: 0 0 0 0.25rem rgba(8, 100, 100, 0.25) !important;
}

.accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23086464'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e") !important;
}

.day-theme {
  color: #f37022;
  font-weight: 500;
}

.accordion-body {
  background: white;
  color: #555;
  line-height: 1.6;
  text-align: justify;
  padding: 1.25rem;
  border-top: 1px solid rgba(8, 100, 100, 0.1);
}

@media (max-width: 768px) {
  .schedule-summary {
    padding: 1rem;
    margin: 0 0.5rem;
  }
  
  .accordion-button {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
  
  .accordion-body {
    padding: 1rem;
    font-size: 0.9rem;
  }
  
  .day-theme {
    display: block;
    margin-top: 0.25rem;
  }
}

/* Add responsive container for mobile */
@media (max-width: 1200px) {
  .schedule-timetable {
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
  }
  
  .schedule-container {
    padding: 0 0.5rem;
    overflow: visible;
  }
  
  /* Show scroll indicator on mobile */
  .schedule-timetable::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 30px;
    background: linear-gradient(to right, transparent, rgba(8, 100, 100, 0.1));
    pointer-events: none;
    opacity: 0.8;
    z-index: 14;
  }
  
  /* Ensure popovers stay on top on mobile */
  .session-cell:hover .session-popover {
    z-index: 9999;
  }
  
  .schedule-grid > :nth-last-child(-n+11):hover {
    z-index: 9998;
  }
  
  .schedule-grid > :nth-last-child(-n+11):hover .session-popover {
    z-index: 9999;
  }
}

/* Maintain cell sizes on mobile */
@media (max-width: 768px) {
  .time-header {
    min-width: 120px;
    font-size: 0.75rem;
    padding: 0.5rem 0.25rem;
  }
  
  .day-label {
    min-width: 90px;
    padding: 0.5rem;
  }
  
  .session-cell {
    min-width: 120px;
    min-height: 80px;
  }
  
  /* Mobile popover adjustments */
  .session-popover {
    z-index: 9999;
    min-width: 200px;
    max-width: 250px;
    font-size: 0.8rem;
    padding: 0.75rem;
  }
  
  .session-cell:hover .session-popover {
    z-index: 9999;
  }
}