:root {
    --primary-color: #0f62fe;
    --ibm-blue-100: #001141;
    --primary-hover: white;
    --badge-color: #525252;
    --secondary-color: #fbc02d;
    --secondary-light: #fde9a0;
    --secondary-medium: #fcd466;
    --text-color: #000;
    --bg-color: #edf5ff;
    --border-radius: 0px;
    --transition: 0.3s ease;
    --time-label-width: 8.5rem;
    --time-label-spacing: 0.714rem;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  
  html {
    font-size: 0.875rem;
  }
  
  body, button, input, select, textarea, header, current-day, .day-button, .geo-button, .filter-buttons {
    font-family: 'IBM Plex Sans', sans-serif;
    background-color: var(--bg-color);
    font-size: 1rem;
  }
  
  .day-button, .geo-button, .filter-buttons, .modal-button {
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    text-align: center;
    justify-content: center;
    transition: background-color var(--transition);
  }
  
  .day-button, .geo-button, .filter-buttons {
    margin: 0 5px;
  }
  
  .day-button, .geo-button {
    background-color: #ddd;
  }
  
  .filter-buttons {
    color: var(--text-color);
    background-color: var(--secondary-light);
    display: flex;
    flex: 0 1 auto;
    white-space: nowrap;
  }
  
  .filter-buttons:hover {
    background-color: var(--secondary-medium);
  }
  
  .filter-buttons.active {
    background-color: var(--secondary-color);
    font-weight: bold;
  }
  
  .modal-button {
    background-color: var(--primary-color);
    color: white;
  }
  
  .modal-button:hover {
    background-color: var(--primary-hover);
  }
  
  .header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 auto 0 calc(var(--time-label-width) + var(--time-label-spacing));
  }
  
  .title {
    background-color: var(--primary-color);
    color: white;
    padding: 20px;
    display: inline-block;
    margin-bottom: 20px;
    font-size: 1.1rem;
  }
  
  .tabs, .legend-wrapper, .filter-tabs {
    display: flex;
    justify-content: center;
    width: 100%;
    margin: 0 auto;
  }
  
  .tabs {
    margin-bottom: 10px;
    overflow-x: scroll;
  }
  
  .filter-tabs {
    display: flex;
    justify-content: center;
    width: calc(100% - var(--time-label-width) - var(--time-label-spacing));
    margin: 20px var(--time-label-spacing) 0 calc(var(--time-label-width) + var(--time-label-spacing));
    flex-wrap: wrap;
    gap: 0.2rem;
  }
  
  .current-day {
    background-color: grey;
    color: white;
    padding: 10px;
    border-radius: 10px;
    text-align: center;
    width: 80%;
    margin: 0 auto 20px;
  }
  
  .day-button:hover, .geo-button:hover {
    background-color: #bbb;
  }
  
  .day-button.active, .geo-button.active {
    background-color: #999;
    color: white;
    font-weight: bold;
  }
  
  .agenda-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 80%; /* Set to 80% of the window width */
    max-width: 1536px; /* 80% of 1920px, which was the previous max-width */
    margin: 0 auto;
    padding-left: 0;
    position: relative;
  }
  
  .session-group-container {
    display: flex;
    align-items: stretch;
    margin-bottom: 15px;
    overflow-x: auto;
    width: 100%;
    justify-content: flex-start;
  }
  
  .time-label,
  .session-element {
    border: 0.214rem solid var(--text-color);
    border-radius: 0 !important;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    opacity: 0;
    height: 4.643rem;
    padding: 0.357rem;
    width: var(--time-label-width);
  }

  .time-label {
    flex-shrink: 0;
    background-color: #fff;
    color: var(--text-color);
    margin-right: 0.714rem;
    width: var(--time-label-width);
    flex-direction: column;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    position: sticky;
    left: 0;
    z-index: 1;
  }

  .time-label br {
    display: block;
    content: "";
    margin-top: 0.2rem;
  }

  .time-label b {
    display: block;
    margin-top: 0.1rem;
  }

  .session-element {
    flex: 1 0 0;
    min-width: 50px;
    margin-right: 8px;
    text-overflow: ellipsis;
    cursor: pointer;
    transition: filter 0.2s ease;
  }

  .session-element::before {
    content: '';
    position: absolute;
    top: -0.214rem;
    right: -0.214rem;
    bottom: -0.214rem;
    left: -0.214rem;
    pointer-events: none;
  }

  .session-element:hover {
    filter: brightness(1.1);
  }

  .time-label.fade-in,
  .session-element.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
  }
  
  .legend-wrapper {
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
  }
  
  .color-legend {
    position: relative;
    padding: 10px;
    background-color: #333;
    border-radius: 10px;
    display: inline-block;
    margin: auto;
  }
  
  .legend-entry {
    display: inline-block;
    font-size: small;
    padding: 5px 10px;
    border-radius: 15px;
    margin: 5px;
    color: white;
    text-align: center;
    transition: all var(--transition);
  }
  
  .tooltip {
    position: relative;
    display: inline-block;
  }
  
  .tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: var(--text-color);
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    bottom: 100%;
    left: 50%;
    margin-left: -60px;
    margin-bottom: 5px;
    opacity: 0;
    transition: opacity var(--transition);
  }
  
  .tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
  }
  
  .modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .modal.show {
    display: block;
    opacity: 1;
  }
  
  .modal-content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    border: none;
    width: 90%;
    max-width: 600px;
    text-align: left;
    margin: 0;
  }
  
  .modal.show .modal-content {
    animation: modalSlideIn 0.3s ease forwards;
  }
  
  @keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -45%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
  }
  
  .close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 32px;
    height: 32px;
    background: #f5f5f5;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #666;
    transition: all 0.2s ease;
  }
  
  .close-btn:hover {
    background: #eeeeee;
    color: #333;
    transform: rotate(90deg);
  }
  
  #modal-text {
    color: #333;
    font-size: 14px;
    line-height: 1.6;
  }
  
  #modal-text h3 {
    color: var(--ibm-blue-100);
    font-size: 24px;
    margin: 0 0 0.5rem;
    padding-right: 2rem;
    line-height: 1.3;
  }
  
  #modal-text b {
    color: #555;
    font-weight: 600;
  }
  
  #modal-text .info-section {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
  }
  
  .modal-button {
    background-color: var(--primary-hover);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 1.5rem;
  }
  
  .modal-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  }
  
  @media (max-width: 768px) {
    .legend-entry {
      flex-basis: calc(50% - 10px);
    }
    .agenda-container {
      width: 95%; /* On smaller screens, allow more width */
    }
    .header,
    .filter-tabs {
        margin-left: 0; /* Remove offset on smaller screens */
    }
    #loading-overlay {
      left: 0;  /* Remove offset on smaller screens */
      width: 100%;  /* Full width on smaller screens */
  }
    .modal-content {
        width: 95%;
        padding: 1.5rem;
        margin: 0;
    }
    
    #modal-text h3 {
        font-size: 20px;
    }
}
  
  @media (max-width: 480px) {
    html {
      font-size: 14px;
    }
    .legend-entry {
      flex-basis: 100%;
    }
  }
  
  #loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    z-index: 10000;
    transition: opacity 0.25s ease;
  }
  
  #loading-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
  }
  
  .loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--bg-color);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
  }
  
  .loading-text {
    text-align: center;
    color: var(--text-color);
    font-family: 'IBM Plex Sans', sans-serif;
    margin-top: 15px;
    font-size: 16px;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
#loading-overlay {
    position: absolute;
    top: 0;
    left: calc(var(--time-label-width) + var(--time-label-spacing));
    width: calc(100% - var(--time-label-width) - var(--time-label-spacing));
    height: 100%;
    background-color: var(--bg-color);
    z-index: 10000;
    transition: opacity 0.5s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.location-badge {
    display: inline-flex;
    align-items: center;
    background: var(--badge-color);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.location-badge .emoji {
    margin-right: 0.5rem;
}