/* Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Custom Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent; /* Fully transparent track */
}

::-webkit-scrollbar-thumb {
  background-color: #888; /* Gray color for the thumb */
  border-radius: 10px;
  border: 2px solid transparent; /* Transparent border for some spacing */
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: #555; /* Darker on hover */
}

body {
  font-family: "Poppins", sans-serif;
  background-color: #fdfdfd;
  color: #333;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100vh;
  padding: 0;
}

/* Header Styles */
header {
  width: 100%;
  padding: 15px 0;
  background-color: #fdfdfd;
  border-bottom: 1px solid #dcdcdc;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.header-link {
  font-size: 2rem;
  color: #3498db;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 1px;
  transition: color 0.3s, transform 0.3s;
  display: inline-block;
  padding: 8px 16px;
  border-radius: 12px;
}

.header-link:hover {
  color: #2ecc71;
  transform: translateY(-3px);
}

.header-link:active {
  background-color: transparent;
}

/* Container Styles */
.container {
  max-width: 600px;
  width: 100%;
  padding: 30px;
  margin-top: 40px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  text-align: center;
}

h2 {
  color: #333;
  font-size: 1.75rem;
  margin-bottom: 20px;
  font-weight: 700;
}

.file-input {
  display: block;
  width: 100%;
  padding: 14px;
  border: 2px solid #ddd;
  border-radius: 10px;
  background-color: #ffffff;
  color: #333;
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.file-input::file-selector-button {
  background-color: #3498db;
  color: #fff;
  border: none;
  padding: 12px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s;
}

.file-input::file-selector-button:hover {
  background-color: #2980b9;
}

#fileList {
  list-style-type: none;
  padding: 0;
  margin: 20px 0;
  max-height: 300px;
  overflow-y: auto;
}

#fileList li {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  margin: 10px 0;
  padding: 15px 20px;
  font-size: 1rem;
  position: relative;
  transition: all 0.2s ease-in-out;
  cursor: grab;
  display: flex;
  align-items: center;
}

/* Dragging Ghost */
#fileList li.dragging {
  opacity: 0.6;
  cursor: grabbing;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Placeholder for Drop Position */
#fileList li.drag-over {
  border: 2px dashed #3498db;
  background-color: #eaf6ff;
}

/* Drag Pointer */
.drag-handle {
  width: 20px;
  height: 20px;
  background-image: url('drag-icon.svg'); /* Replace with the path to your custom drag pointer */
  background-size: cover;
  cursor: grab;
  margin-right: 15px;
}

.drag-handle:hover {
  cursor: grabbing;
}

/* Highlight active item being dragged */
#fileList li.active {
  background-color: #f0f0f0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

/* Smooth transition for surrounding items */
#fileList li {
  transition: transform 0.3s ease-in-out;
}

.remove-btn {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  background-color: #e74c3c;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.3s ease-in-out;
}

.remove-btn:hover {
  background-color: #c0392b;
}

.remove-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.5);
}

/* Button Group Styles */
.button-group {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 20px;
}

#mergeButton,
#clearAllButton {
  padding: 14px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: background-color 0.3s, transform 0.3s;
}

#mergeButton {
  background-color: #3498db;
  color: #fff;
}

#mergeButton:hover {
  background-color: #2980b9;
  transform: translateY(-1px);
}

#clearAllButton {
  background-color: #f1c40f;
  color: #333;
}

#clearAllButton:hover {
  background-color: #f39c12;
  transform: translateY(-1px);
}

/* Floating Warning Styles */
.floating-warning {
  position: fixed;
  top: 20px;
  right: 20px;
  background: #e74c3c;
  color: #fff;
  padding: 15px 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  opacity: 0;
  transform: translateY(-20px);
  visibility: hidden;
  transition: opacity 0.4s ease, transform 0.4s ease, visibility 0s linear 0.4s;
}

.floating-warning.show {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.floating-warning.hide {
  opacity: 0;
  transform: translateY(-20px);
  visibility: hidden;
  transition: opacity 0.4s ease, transform 0.4s ease, visibility 0s linear 0.4s;
}

.floating-warning #warningMessage {
  font-size: 1rem;
}

.floating-warning #closeWarning {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: #fff;
  cursor: pointer;
  margin-left: 15px;
}

.floating-warning #closeWarning:hover {
  color: #ccc;
}