/* PDF Preview Modal */
.preview-modal{display:none;position:fixed;inset:0;z-index:10000;align-items:center;justify-content:center;padding:20px}
.preview-modal.show{display:flex}
.preview-overlay{position:absolute;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.preview-content{position:relative;background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.3);max-width:920px;width:100%;height:92vh;max-height:92vh;overflow:hidden;display:flex;flex-direction:column;animation:modalSlideIn .3s ease-out}
.preview-header{padding:16px 20px;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;gap:12px}
.preview-title{margin:0;font-size:1.1rem;color:#111827}
.preview-actions{display:flex;gap:8px}
.preview-btn{padding:8px 12px;border-radius:10px;border:1px solid #e5e7eb;background:#f8fafc;color:#111827;cursor:pointer}
.preview-btn:hover{background:#eef2f7}
.preview-body{flex:1;background:#f3f4f6}
.preview-frame{width:100%;height:100%;border:0;background:#fff}
@keyframes modalSlideIn{from{opacity:0;transform:translateY(-10px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}
@media (max-width:640px){.preview-content{max-height:95vh;border-radius:12px}.preview-header{padding:12px 12px}}