/* ——————————————————————————
   一、全局工具类 (utilities)
   —————————————————————————— */
:root {
  --primary:       #4f46e5;
  --primary-hover: #3730a3;
  --success:       #16a34a;
  --border:        #e5e7eb;
  --gray-400:      #9ca3af;
}
.flex { display: flex !important; }
.items-center { align-items: center !important; }
.justify-center { justify-content: center !important; }
/* 如果希望垂直排列 —— 图标在上文字在下 */
.flex-column { flex-direction: column !important; }

.hidden      { display: none !important; }
.w-full      { width: 100% !important; }
.h-full      { height: 100% !important; }
.object-contain { object-fit: contain !important; }
.border-4      { border-width: 4px; }
.border-dashed { border-style: dashed; }
.border-gray-200 { border-color: var(--border); }
.rounded-lg     { border-radius: 0.5rem; }
.text-gray-400  { color: var(--gray-400); }

@media (min-width: 768px) {
  .md\:h-96 { height: 24rem; }
}

/* ——————————————————————————
   二、按钮样式 (Buttons)
   —————————————————————————— */
.tool-inner-container .btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.tool-inner-container .btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
}
.tool-inner-container .btn-success {
  background-color: var(--success);
  border-color: var(--success);
  color: #fff;
}

/* ——————————————————————————
   三、上传区 (Dropzone)
   —————————————————————————— */
.ot-dropzone {
  border: 2px dashed var(--border);
  border-radius: 0.5rem;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: background-color .2s;
  position: relative;
}
.ot-dropzone.dragover {
  background-color: rgba(0,0,0,0.05);
}

/* ——————————————————————————
   四、预览区 (Preview)
   —————————————————————————— */
.ot-preview-box {
  display: flex;
  align-items: flex-start;
  border: 1px solid #eaeaea;
  border-radius: 0.25rem;
  padding: 1rem;
  margin-bottom: 1rem;
  gap: 1rem;
}
.ot-preview-box img {
  max-width: 150px;
  border-radius: 0.25rem;
}
.text-4xl {
  font-size: 2.25rem;
  line-height: 2.5rem;
}
.mb-2 {
  margin-bottom: 0.5rem;
}