.upload-dropzone,
.upload-box {
  --upload-border: var(--color-border);
  --upload-border-active: var(--color-primary);
  --upload-bg: var(--color-surface-muted);
  --upload-bg-active: var(--color-primary-soft);
  --upload-text: var(--color-text);
  --upload-muted: var(--color-text-muted);

  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  border: 2px dashed var(--upload-border);
  border-radius: var(--radius-lg);
  background: var(--upload-bg);
  color: var(--upload-text);
  cursor: pointer;
  text-align: center;
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.05);
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, opacity 0.18s ease;
}

.upload-shell {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

.tool-ui .upload-shell,
.tool-ui .upload-box,
.tool-ui .upload-dropzone,
.tool-stack > .upload-box,
.tool-stack > .upload-dropzone,
.tool-stack > .upload-shell {
  justify-self: center;
}

.upload-dropzone:hover,
.upload-dropzone:focus-visible,
.upload-dropzone.is-dragover,
.upload-box:hover,
.upload-box:focus-visible,
.upload-box.is-dragover {
  border-color: var(--upload-border-active);
  background: var(--upload-bg-active);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.12), 0 16px 30px rgba(37, 99, 235, 0.12);
  outline: none;
  transform: translateY(-2px);
}

.upload-dropzone__content,
.upload-content {
  display: grid;
  justify-items: center;
  gap: 0.55rem;
  max-width: 28rem;
}

.upload-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.4rem;
}

.upload-dropzone__primary,
.upload-content h2 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.25;
  font-weight: 700;
}

.upload-dropzone__secondary,
.upload-content p,
.upload-content small,
.upload-dropzone__meta,
.upload-dropzone__privacy,
.upload-file-meta {
  margin: 0;
  color: var(--upload-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.upload-dropzone__meta,
.upload-dropzone__privacy {
  display: block;
}

.upload-file-meta[hidden] {
  display: none;
}

.upload-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  margin-bottom: 0.15rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary);
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}

.upload-icon svg {
  width: 1.6rem;
  height: 1.6rem;
  color: currentColor;
}

.upload-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
}

.upload-action:hover {
  background: var(--color-primary-strong);
  border-color: var(--color-primary-strong);
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.18);
}

.upload-change-file {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.4rem;
  margin-top: 0.55rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.upload-change-file[hidden] {
  display: none;
}

.upload-change-file:hover {
  background: var(--color-surface-muted);
  border-color: var(--color-border-strong);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
}

.upload-dropzone.has-file .upload-dropzone__primary,
.upload-box.has-file .upload-content h2 {
  word-break: break-word;
}

.upload-dropzone.is-confirmed .upload-dropzone__secondary,
.upload-dropzone.is-confirmed .upload-dropzone__meta,
.upload-dropzone.is-confirmed .upload-dropzone__privacy,
.upload-box.is-confirmed .upload-content p,
.upload-box.is-confirmed .upload-content .upload-dropzone__meta,
.upload-box.is-confirmed .upload-content .upload-dropzone__privacy {
  display: none;
}

@media (max-width: 640px) {
  .upload-dropzone,
  .upload-box {
    min-height: 160px;
    padding: 1.5rem 1rem;
  }
}