:root {
  --main-color: #84B6FF;
  --main-color-light: #a7cdff;
  --main-color-dark: #5a8edb;
  --text-color: #333;
  --background-color: #f9fcff;
}

body {
  font-family: sans-serif;
  background: var(--background-color);
  margin: 0;
  padding: 0;
  color: var(--text-color);
}

header, footer {
  background: var(--main-color);
  color: #fff;
  text-align: center;
  padding: 1em;
}

main {
  padding: 1em;
}

.btn {
  display: inline-block;
  background: var(--main-color);
  color: #fff;
  padding: 0.6em 1.2em;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  margin-top: 0.5em;
}

.btn:hover {
  background: var(--main-color-dark);
}

.upload-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-start;
}

.upload-left {
  flex: 1 1 300px;
}

.preview-container {
  flex: 1 1 300px;
  max-height: 300px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--main-color-light);
  border-radius: 8px;
  padding: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preview-container img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.howto {
  margin-top: 2em;
  background: #fff;
  padding: 1em;
  border-radius: 8px;
  border: 1px solid var(--main-color-light);
}
.preview-container {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preview-thumb {
  position: relative;
}

.preview-thumb img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.remove-btn {
  position: absolute;
  top: -6px;
  right: -6px;
  background: #fff;
  color: #ff6666;
  border: none;
  border-radius: 50%;
  font-size: 12px;
  width: 20px;
  height: 20px;
  cursor: pointer;
}