/* PDF水印工具 */
.pdfw-grid { display: grid; grid-template-columns: 400px minmax(0, 1fr); gap: 20px; align-items: start; }
.pdfw-panel { background: var(--bg); border: 1px solid var(--rule); border-radius: var(--radius-md); padding: 20px; }
.pdfw-section { margin-bottom: 20px; }
.pdfw-section:last-child { margin-bottom: 0; }
.pdfw-section h3 { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: .95rem; margin: 0 0 12px; }
.pdfw-section h3 > span { display: inline-flex; align-items: center; gap: 6px; }
.pdfw-section h3 i { color: var(--accent); }

.pdfw-upload { border: 2px dashed var(--rule); border-radius: var(--radius-md); padding: 26px 16px; text-align: center; cursor: pointer; transition: all .2s ease; background: var(--bg2); }
.pdfw-upload:hover, .pdfw-upload.dragover { border-color: var(--accent); background: var(--accent-soft); }
.pdfw-upload i:first-child { font-size: 2rem; color: var(--accent); }
.pdfw-upload p { margin: 10px 0 6px; font-weight: 600; }
.pdfw-hint { font-size: .8rem; color: var(--muted); }

.pdfw-fileinfo { margin-top: 12px; display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; background: var(--bg2); border: 1px solid var(--rule); border-radius: var(--radius-sm); }
.pdfw-fname { font-size: .85rem; color: var(--ink); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pdfw-fmeta { font-size: .76rem; color: var(--muted); }
#changePdfBtn { margin-top: 10px; }

.pdfw-type { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.pdfw-type-opt { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 11px; border: 1px solid var(--rule); border-radius: var(--radius-sm); cursor: pointer; font-size: .88rem; color: var(--muted); transition: all .15s ease; background: var(--bg); }
.pdfw-type-opt input { display: none; }
.pdfw-type-opt i { font-size: 1.1rem; }
.pdfw-type-opt:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.pdfw-type-opt:hover { border-color: var(--accent); color: var(--accent); }

.pdfw-sub { margin-bottom: 6px; }
.pdfw-formgroup { margin-bottom: 14px; }
.pdfw-formgroup > label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: 6px; }
.pdfw-formgroup input[type="text"], .pdfw-formgroup input[type="range"] { width: 100%; }
.pdfw-formgroup input[type="text"] { padding: 9px 12px; border: 1px solid var(--rule); border-radius: var(--radius-sm); background: var(--bg); color: var(--ink); font-size: .9rem; box-sizing: border-box; }
.pdfw-formgroup input[type="text"]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.pdfw-formgroup input[type="range"] { accent-color: var(--accent); }
.pdfw-colorgroup { display: flex; gap: 8px; }
.pdfw-colorgroup input[type="color"] { width: 42px; height: 38px; padding: 2px; border: 1px solid var(--rule); border-radius: var(--radius-sm); background: var(--bg); cursor: pointer; flex-shrink: 0; }
.pdfw-colorgroup input[type="text"] { flex: 1; min-width: 0; }

.pdfw-img-upload { padding: 20px 12px; }
.pdfw-img-upload p { font-size: .9rem; margin: 8px 0 4px; }

.pdfw-posgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.pdfw-posgrid button { aspect-ratio: 1; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--rule); border-radius: var(--radius-sm); background: var(--bg2); color: var(--muted); cursor: pointer; font-size: 1rem; transition: all .15s ease; }
.pdfw-posgrid button:hover { border-color: var(--accent); color: var(--accent); }
.pdfw-posgrid button.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

.pdfw-actions { display: flex; gap: 10px; }
.pdfw-actions .btn { flex: 1; justify-content: center; }
.pdfw-actions .btn:disabled { opacity: .5; cursor: not-allowed; }

.pdfw-previewbox { min-height: 430px; display: flex; align-items: center; justify-content: center; background: var(--bg2); border: 1px dashed var(--rule); border-radius: var(--radius-sm); padding: 16px; overflow: auto; }
.pdfw-placeholder { text-align: center; color: var(--muted); }
.pdfw-placeholder i { font-size: 3rem; color: var(--accent); display: block; margin-bottom: 12px; opacity: .7; }
.pdfw-previewbox canvas { max-width: 100%; max-height: 480px; border-radius: 8px; box-shadow: 0 6px 24px rgba(0,0,0,.16); }
.pdfw-previewinfo { text-align: center; font-size: .82rem; color: var(--muted); margin: 10px 0 0; min-height: 18px; }

.pdfw-feedback { margin-top: 10px; padding: 9px 12px; border-radius: var(--radius-sm); font-size: .82rem; display: none; }
.pdfw-feedback.show { display: block; }
.pdfw-feedback.success { background: rgba(22,163,74,.12); border: 1px solid rgba(22,163,74,.35); color: #166534; }
.pdfw-feedback.error { background: rgba(225,29,72,.12); border: 1px solid rgba(225,29,72,.35); color: #be123c; }
.pdfw-tip { margin-top: 16px; display: flex; gap: 8px; padding: 10px 14px; background: var(--accent-soft); border-radius: var(--radius-sm); font-size: .82rem; color: var(--muted); align-items: flex-start; line-height: 1.5; }
.pdfw-tip i { color: var(--accent); margin-top: 2px; flex-shrink: 0; }

@media (max-width: 900px) {
  .pdfw-grid { grid-template-columns: 1fr; }
}