body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      margin: 0;
      background-color: #f5f5f5;
      color: #333;
    }

    header {
      background-color: #222;
      color: #fff;
      padding: 1rem 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
    }

    header a {
      color: #fff;
      text-decoration: none;
      margin-left: 1rem;
      font-weight: 500;
      transition: color 0.3s;
    }

    header a:hover {
      color: #f39c12;
    }

    main {
      max-width: 1200px;
      margin: 2rem auto;
      padding: 0 1rem;
    }

    h1 {
      text-align: center;
      margin-bottom: 2rem;
      font-size: 2.5rem;
    }

    .projects {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 1.5rem;
    }

    .project-card {
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
      padding: 1rem;
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .project-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }

    .project-card img {
      width: 100%;
      border-radius: 4px;
      margin-bottom: 0.8rem;
    }

    .project-card h3 {
      margin: 0 0 0.5rem 0;
      font-size: 1.2rem;
    }

    .project-card p {
      font-size: 0.95rem;
      line-height: 1.4;
      color: #555;
    }

    footer {
      text-align: center;
      padding: 1rem;
      background: #222;
      color: #fff;
      margin-top: 3rem;
    }

    #country-filters {
        width: 250px;
        max-height: 500px; /* same height as chart */
        overflow-y: auto;
        border: 1px solid #ccc;
        padding: 10px;
        background: #f9f9f9;
        border-radius: 5px;
        font-family: sans-serif;
        font-size: 14px;
    }

    #country-filters input[type="text"] {
        width: 100%;
        box-sizing: border-box;
    }
    
    .country-checkbox-label {
        margin: 5px 0;
    }

    #page-content {
        margin-left: clamp(1rem, 5vw, 5rem);
        margin-right: clamp(1rem, 5vw, 5rem);
        margin-bottom: clamp(1rem, 5vw, 5rem);
    }

  #scroll-play-btn {
  background: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  font-size: 16px;
  font-weight: 600;
  color: #0d306b;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

#scroll-play-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  background: #f0f4f8;
}

#scroll-play-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Temporary duplicate styles for the second button.  I'll make an effort to fix this in the future*/
  #scroll-play-btn2 {
  background: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  font-size: 16px;
  font-weight: 600;
  color: #0d306b;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

#scroll-play-btn2:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  background: #f0f4f8;
}

#scroll-play-btn2:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#year-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 12px;
  border-radius: 8px;
  background: #e0e7f0; /* light background for track */
  outline: none;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
  transition: background 0.2s ease;
  cursor: pointer;
}

#year-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #0d306b;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#year-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

#year-slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #0d306b;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#year-slider::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Temporary duplicate styles for the second slider.  I'll make an effor to fix this in the future*/
#year-slider2 {
  -webkit-appearance: none;
  width: 100%;
  height: 12px;
  border-radius: 8px;
  background: #e0e7f0; /* light background for track */
  outline: none;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
  transition: background 0.2s ease;
  cursor: pointer;
}

#year-slider2::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #0d306b;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#year-slider2::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

#year-slider2::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #0d306b;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#year-slider2::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

#basic-text {
  font-family: 'Arial', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #0d306b;
  background: #fff;
  border-radius: 6px;
  padding: 4px 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  display: inline-block;
}

/* Popup container */
.custom-popup {
    border-radius: 50px;
    background: linear-gradient(135deg, #363638, #848691);
    padding: 30px 50px;
    text-align: center;
    color: white;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
    font-family: Arial, sans-serif;
}

/* Title */
.custom-popup-title {
    font-size: 24px;
    margin-bottom: 15px;
}

/* Text */
.custom-popup-text {
    font-size: 16px;
    margin-bottom: 20px;
}

/* Confirm button */
.custom-popup-button {
    padding: 10px 20px;
    border-radius: 50px;
    border: black;
    background: linear-gradient(135deg, #17a2b8, #4bc0c8);
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.custom-popup-button:hover {
    background: linear-gradient(135deg, #4bc0c8, #17a2b8);
    box-shadow: 0px 6px 15px rgba(0, 0, 0, 0.2);
}

/* Container aligned right like #dropdown-container */
.variable-wrapper {
  display: flex;
  justify-content: flex-end;
  gap: 15px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-family: Arial, sans-serif;
}

/* Individual container */
.variable-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Label */
.variable-label {
  font-size: 14px;
  font-weight: 600;
  color: #4b4b4e;
}

/* Dropdown style — matches #variable-dropdown */
.variable-select {
  -webkit-appearance: none;
  appearance: none;
  margin: 5px 0;
  padding: 10px 20px;
  font-size: 14px;
  border: none;
  border-radius: 50px;
  background: linear-gradient(135deg, #4b4b4e, #848691);
  color: white;
  cursor: pointer;
  transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
  box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
  background-color: #4b4b4e;
}

/* Hover */
.variable-select:hover {
  background: #8c8d97;
  box-shadow: 0px 6px 15px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

/* Focus */
.variable-select:focus {
  outline: none;
  border: 2px solid #b1b1b4;
}


.variable-button:hover {
  background: #8c8d97;
  box-shadow: 0px 6px 15px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

/* Output text */
.variable-output {
  font-size: 14px;
  font-weight: 600;
    margin-top: 20px;
    padding: 8px 16px;
}

/* Responsive behavior */
@media (max-width: 768px) {
  .variable-wrapper {
    justify-content: center;
    margin-top: 10px;
  }

  .variable-select {
    width: 100%;
    max-width: 250px;
  }
}

.select-all-button {
  margin-top: 20px;
  padding: 8px 16px;
  cursor: pointer;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
}

.select-all-button:focus {
  outline: none;
  border: 2px solid #45a049;
}

.select-all-button:hover {
  background: #45a049;
  box-shadow: 0px 6px 15px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

.clear-all-button {
  padding: 8px 16px;
  cursor: pointer;
  margin-top: 20px;
  background: #d64c42;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
}

.clear-all-button:focus {
  outline: none;
  border: 2px solid #b33a2f;
}

.clear-all-button:hover {
  background: #b33a2f;
  box-shadow: 0px 6px 15px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}