:root {
    --pink: #ff9ecb;
    --pink-dark: #ff6cab;
    --blue: #a7d8ff;
    --purple: #cbb5ff;
    --bg: #fff7fb;
    --text: #444;
    font-family: "Nunito", "Segoe UI", sans-serif;
  }

  body {
    margin: 0;
    padding: 24px;
    background: var(--bg);
  }


  h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--pink-dark);
    margin-bottom: 12px;
  }

  .wrap {
    max-width: 1000px;
    margin: auto;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
  }

  .panel {
    background: white;
    border-radius: 16px;
    padding: 20px;
    flex: 1 1 420px;
    border: 2px solid #ffe2f3;
    box-shadow: 0 3px 15px rgba(255, 167, 231, .25);
  }

  label {
    font-size: 14px;
    color: var(--text);
    margin-bottom: 6px;
    display: block;
  }

#base64input {
  width: 100%;
  height: 180px;              
  padding: 12px;
  border-radius: 12px;
  border: 2px solid #ffd6ec;
  background: #fff;
  font-family: monospace;
  font-size: 14px;
  line-height: 1.4;
  resize: vertical;       
  overflow-y: auto;        
  box-sizing: border-box;
}

body.dark-theme textarea#base64input {
  color: #000
}

  textarea, input[type="text"], select {
    width: 100%;
    padding: 12px;
    border-radius: 12px;
    border: 2px solid #ffd6ec;
    background: #fff;
    font-family: monospace;
    box-sizing: border-box;
  }

  textarea:focus, input:focus, select:focus {
    outline: none;
    border-color: var(--pink);
    box-shadow: 0 0 0 4px #ffd6ec6a;
  }

  input[type="file"] {
    margin-top: 8px;
  }

  .btn {
    background: var(--pink);
    border: none;
    padding: 10px 16px;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    font-weight: 600;
    transition: 0.25s;
  }

  .btn:hover {
    background: var(--pink-dark);
    transform: translateY(-1px);
  }

  .btn.secondary {
    background: #ffffff;
    color: var(--pink-dark);
    border: 2px solid var(--pink);
  }

  .btn.secondary:hover {
    background: var(--pink);
    color: white;
  }

  .dropzone {
    border-radius: 12px;
    border: 2px dashed #ffaad6;
    background: #fff3fa;
    padding: 18px;
    text-align: center;
    margin-top: 12px;
    color: #d45fa5;
    font-size: 14px;
  }

  .preview {
    text-align: center;
    border: 2px dashed #666;
    padding: 12px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
  }

  img.preview-img {
    max-width: 100%;
    border-radius: 16px;
    border: 2px solid #ffd6ec;
    margin-top: 10px;
  }

  #controls {
    display: flex;
    gap: 10px;
    margin-top: 14px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .meta {
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: #777;
    margin-top: 4px;
  }

  #fileInput {
  display: inline-block;
  background: #ff9acb;
  border: none;
  padding: 10px 18px;
  border-radius: 10px;
  cursor: pointer;
  color: white;
  font-weight: 600;
  font-size: 14px;
  transition: 0.2s ease;
}

#fileInput:hover {
  background: #ff7fb8;
  transform: translateY(-1px);
}

#fileInput:active {
  background: #ff65aa;
  transform: translateY(0);
}

.upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #ffb7e1, #ff7fcf);
  padding: 12px 20px;
  border-radius: 12px;
  cursor: pointer;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  border: none;
  box-shadow: 0 4px 12px rgba(255, 140, 193, 0.4);
  transition: 0.2s ease;
  user-select: none;
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(255, 140, 193, 0.55);
}

.upload-btn:active {
  transform: translateY(0);
  box-shadow: 0 3px 10px rgba(255, 140, 193, 0.4);
}

#fileInput {
  display: none !important;
}

.preview-box img {
  max-width: 100%;
  max-height: 220px;
  border-radius: 8px;
}

/* Drag */
#dropZone.dragover {
  background: #e5d4f7;
  border-color: #8d60b8;
}

/* Clear button */
.clear-btn {
  margin-top: 12px;
  padding: 12px;
  background: #8e59b8;
  border-radius: 10px;
  border: none;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
}

/* Textarea & copy/download buttons */
#base64output {
  width: 100%;
  height: 220px;
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 12px;
  border: 1px solid #c8a4df;
  background: #fbf8ff;
  resize: vertical;
  color: #4b3567;
  font-size: 14px;
}


/* Đồng bộ panel bên trái như phần base64 → image */
.preview-box {
  border-radius: 12px;
  border: 2px dashed #ffaad6;
  background: #fff3fa;
  padding: 18px;
  text-align: center;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-box img {
  max-width: 100%;
  max-height: 200px;
  border-radius: 12px;
  display: block;
}


#base64output {
  width: 100%;
  height: 260px;
  padding: 12px;
  border-radius: 12px;
  border: 2px solid #ffd6ec;
  background: #fff;
  font-family: monospace;
  font-size: 14px;
  resize: vertical;
  box-sizing: border-box;
}

#base64output:focus {
  outline: none;
  border-color: var(--pink);
  box-shadow: 0 0 0 4px #ffd6ec6a;
}

.wrap-bottom {
    margin-top: 50px;
}

#dropZone2 {
  border: 2px dashed #666;
  padding: 12px;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#dropZone2.dragover {
  border-color: #00d5ff;
}
.preview-img {
  max-width: 100%;
  max-height: 100%;
}

body.dark-theme {
  --bg: #2b1f3b; /* nền tím pastel đậm */
  --text: #eee;
  --pink: #d29bff;
  --pink-dark: #a463d9;
  --blue: #8ac4ff;
  --purple: #cbb5ff;
}

body.dark-theme .panel {
  background: #3a2a4d;
  border-color: #5b3a7a;
  box-shadow: 0 3px 15px rgba(200, 150, 255, 0.25);
  color: var(--text);
}

body.dark-theme textarea,
body.dark-theme input,
body.dark-theme select {
  background: #4b365e;
  color: #eee;
  border-color: #6a4b85;
}

body.dark-theme .dropzone,
body.dark-theme .preview-box {
  background: #452f5b;
  border-color: #5e3f84;
  color: #d0baff;
}

body.dark-theme .btn {
  background: var(--pink);
  color: white;
}

body.dark-theme .btn.secondary {
  background: #3a2a4d;
  color: var(--pink);
  border-color: var(--pink);
}

body.dark-theme .btn.secondary:hover {
  background: var(--pink);
  color: white;
}

#englishBtn {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 999;
}

#error {
  color: red;
  font-weight: bold;
  animation: blink 5s infinite;
}

@keyframes blink {
  0%, 50%, 100% {
    opacity: 1;
  }
  25%, 75% {
    opacity: 0;
  }
}

.ads-block {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 60px;
}