*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #242424;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent: #0088cc;
  --accent-hover: #0099ee;
  --border: #333333;
  --success: #4caf50;
  --error: #f44336;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
body { overflow-x: hidden; }

/* Login */
.login-page { display:flex; align-items:center; justify-content:center; min-height:100vh; padding:20px; }
.login-container { width:100%; max-width:400px; }
.login-card { background:var(--bg-secondary); border:1px solid var(--border); border-radius:16px; padding:40px 32px; text-align:center; }
.login-logo { font-size:64px; margin-bottom:16px; }
.login-title { font-size:28px; font-weight:700; margin-bottom:8px; }
.login-subtitle { color:var(--text-secondary); margin-bottom:32px; }
.login-status { display:none; padding:12px 16px; border-radius:8px; margin-bottom:24px; font-size:14px; }
.status-info { background:rgba(0,136,204,0.15); color:var(--accent); border:1px solid var(--accent); }
.status-error { background:rgba(244,67,54,0.15); color:var(--error); border:1px solid var(--error); }
.status-success { background:rgba(76,175,80,0.15); color:var(--success); border:1px solid var(--success); }
.login-input { width:100%; padding:14px 18px; border:1px solid var(--border); border-radius:12px; background:var(--bg-tertiary); color:var(--text-primary); font-size:15px; text-align:center; }
.login-input::placeholder { color:var(--text-secondary); }
.login-input:focus { outline:none; border-color:var(--accent); }

/* App layout */
.app-layout { display:flex; min-height:100vh; }
.app-sidebar { width:280px; background:var(--bg-secondary); border-right:1px solid var(--border); padding:24px 16px; display:flex; flex-direction:column; position:fixed; top:0; left:0; height:100vh; overflow-y:auto; }
.app-main { flex:1; margin-left:280px; padding:24px 32px; min-height:100vh; }
.app-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:24px; }
.app-header h1 { font-size:24px; font-weight:700; }

/* Buttons */
.btn-icon { width:40px; height:40px; border:none; border-radius:10px; background:var(--bg-tertiary); color:var(--text-primary); cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:18px; transition:background 0.2s; }
.btn-icon:hover { background:var(--border); }
.btn-primary { padding:14px 24px; border:none; border-radius:12px; background:var(--accent); color:white; font-size:15px; font-weight:600; cursor:pointer; transition:background 0.2s,transform 0.1s; }
.btn-primary:hover { background:var(--accent-hover); }
.btn-primary:active { transform:scale(0.98); }
.btn-secondary { padding:14px 24px; border:1px solid var(--border); border-radius:12px; background:var(--bg-tertiary); color:var(--text-primary); font-size:15px; font-weight:600; cursor:pointer; transition:background 0.2s; }
.btn-secondary:hover { background:var(--border); }

/* Tag cloud */
.tag-cloud { margin-bottom:24px; }
.tag-cloud-title { font-size:12px; text-transform:uppercase; color:var(--text-secondary); margin-bottom:12px; letter-spacing:0.5px; }
.tag-cloud-search { width:100%; padding:8px 12px; border:1px solid var(--border); border-radius:8px; background:var(--bg-tertiary); color:var(--text-primary); font-size:14px; margin-bottom:12px; }
.tag-cloud-search::placeholder { color:var(--text-secondary); }
.tag-cloud-search:focus { outline:none; border-color:var(--accent); }
.tags-list { display:flex; flex-wrap:wrap; gap:8px; }
.tag-btn { padding:6px 14px; border-radius:20px; border:none; cursor:pointer; font-size:13px; font-weight:500; transition:all 0.2s; opacity:0.85; }
.tag-btn:hover { opacity:1; transform:scale(1.02); }
.tag-btn--selected { opacity:1; }
.tag-btn-x { margin-left:6px; font-size:15px; line-height:1; opacity:0.8; }
.tag-btn--selected:hover .tag-btn-x { opacity:1; }

/* Files grid */
.files-section { background:var(--bg-secondary); border:1px solid var(--border); border-radius:16px; padding:20px; min-height:400px; }
.files-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:16px; }
.file-card { background:var(--bg-tertiary); border-radius:12px; cursor:pointer; transition:transform 0.2s,box-shadow 0.2s; position:relative; }
.file-card:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(0,0,0,0.3); }
.file-card-thumb { width:100%; aspect-ratio:3/4; background:var(--bg-primary); display:flex; align-items:center; justify-content:center; overflow:hidden; border-radius:12px; }
.file-card-thumb img { width:100%; height:100%; object-fit:cover; }
.file-card-thumb .ext-icon { font-size:12px; font-weight:700; color:var(--text-secondary); opacity:0.8; }
.file-card-menu-btn { position:absolute; top:8px; right:8px; width:28px; height:28px; border-radius:50%; background:rgba(0,0,0,0.6); border:none; color:white; cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:14px; opacity:0; transition:opacity 0.2s; }
.file-card:hover .file-card-menu-btn { opacity:1; }
.file-card-menu { position:absolute; top:40px; right:8px; background:var(--bg-secondary); border:1px solid var(--border); border-radius:10px; overflow:hidden; z-index:1000; box-shadow:0 4px 16px rgba(0,0,0,0.4); }
.file-card--active { z-index:10; }
.file-card-menu button { width:40px; height:40px; border:none; background:transparent; color:var(--text-primary); cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:16px; }
.file-card-menu button:hover { background:var(--bg-tertiary); }
.file-card-menu button.delete:hover { background:rgba(244,67,54,0.2); color:var(--error); }

/* Upload */
.upload-section { margin-top:24px; }
.upload-buttons { display:flex; gap:12px; }
.upload-progress { margin-top:12px; text-align:center; color:var(--text-secondary); font-size:14px; }
.upload-error { margin-top:12px; text-align:center; color:var(--error); font-size:14px; padding:10px; background:rgba(244,67,54,0.1); border-radius:8px; }

/* Drag and drop */
.app-main.drag-over { background:rgba(0,136,204,0.08); }
.app-main.drag-over .files-section { border:2px dashed var(--accent); }

/* Modal */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.7); display:flex; align-items:center; justify-content:center; z-index:1000; padding:20px; }
.modal { background:var(--bg-secondary); border:1px solid var(--border); border-radius:16px; padding:24px; width:100%; max-width:400px; }
.modal-title { font-size:18px; font-weight:600; margin-bottom:16px; }
.modal-input { width:100%; padding:12px 16px; border:1px solid var(--border); border-radius:10px; background:var(--bg-tertiary); color:var(--text-primary); font-size:14px; }
.modal-input::placeholder { color:var(--text-secondary); }
.modal-input:focus { outline:none; border-color:var(--accent); }
.modal-buttons { display:flex; gap:12px; margin-top:20px; }
.modal-buttons .btn-primary, .modal-buttons .btn-secondary { flex:1; }
.modal-textarea { margin-top:12px; resize:vertical; min-height:80px; font-family:inherit; line-height:1.4; }
.modal-char-counter { font-size:12px; color:var(--text-secondary); text-align:right; margin-top:4px; }
.modal-text { white-space:pre-wrap; word-break:break-word; max-height:60vh; overflow-y:auto; font-size:14px; line-height:1.5; color:var(--text-primary); }

/* Viewer */
.viewer-overlay { position:fixed; inset:0; background:black; z-index:2000; display:flex; flex-direction:column; }
.viewer-header { padding:12px 20px; display:flex; align-items:center; justify-content:space-between; background:var(--bg-secondary); border-bottom:1px solid var(--border); gap:12px; width:100%; box-sizing:border-box; }
.viewer-header-title { font-size:14px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; flex:0 1 auto; min-width:0; color:var(--text-primary); }
.viewer-toolbar { display:flex; align-items:center; gap:8px; flex:0 0 auto; }
.viewer-actions { display:flex; align-items:center; gap:8px; flex:0 0 auto; margin-left:auto; }
.viewer-action-btn { width:32px; height:32px; border-radius:8px; border:1px solid var(--border); background:var(--bg-tertiary); color:var(--text-primary); font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.15s; }
.viewer-action-btn:hover { background:var(--border); }
.viewer-zoom-btn { width:32px; height:32px; border-radius:8px; border:1px solid var(--border); background:var(--bg-tertiary); color:var(--text-primary); font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.15s; }
.viewer-zoom-btn:hover { background:var(--border); }
.viewer-zoom-val { font-size:13px; font-weight:600; color:var(--text-secondary); min-width:44px; text-align:center; }
.viewer-close-btn { padding:8px 16px; border-radius:8px; border:1px solid var(--border); background:var(--bg-tertiary); color:var(--text-primary); cursor:pointer; font-size:14px; }
.viewer-close-btn:hover { background:var(--border); }
.viewer-body { flex:1; display:flex; align-items:center; justify-content:center; overflow:hidden; position:relative; }
.viewer-body img { max-width:100%; max-height:100%; object-fit:contain; user-select:none; touch-action:none; }

.empty-state, .loading-state { display:flex; flex-direction:column; align-items:center; justify-content:center; height:300px; color:var(--text-secondary); }

/* Pages badge */
.file-card-pages-badge { position:absolute; top:8px; left:8px; background:rgba(0,136,204,0.85); color:white; font-size:11px; font-weight:600; padding:3px 8px; border-radius:6px; z-index:10; }

/* Pages view overlay */
.pages-view { background:var(--bg-secondary); border:1px solid var(--border); border-radius:16px; padding:24px; width:100%; max-width:800px; max-height:80vh; overflow-y:auto; }
.pages-view-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; }
.pages-view-title { font-size:18px; font-weight:600; }
.pages-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(140px,1fr)); gap:16px; }
.page-card { background:var(--bg-tertiary); border-radius:10px; overflow:hidden; cursor:pointer; transition:transform 0.2s; position:relative; }
.page-card:hover { transform:translateY(-2px); }
.page-card-thumb { width:100%; aspect-ratio:3/4; background:var(--bg-primary); display:flex; align-items:center; justify-content:center; overflow:hidden; }
.page-card-thumb img { width:100%; height:100%; object-fit:cover; }
.page-card-thumb .ext-icon { font-size:12px; font-weight:700; color:var(--text-secondary); }
.page-number { position:absolute; top:6px; left:6px; background:rgba(0,0,0,0.7); color:white; font-size:12px; font-weight:600; padding:2px 8px; border-radius:6px; z-index:10; }
.page-card-actions { position:absolute; top:6px; right:6px; display:flex; flex-direction:column; gap:3px; z-index:10; }
.page-card-delete-btn { width:24px; height:24px; border-radius:50%; background:rgba(0,0,0,0.7); color:white; border:none; font-size:16px; line-height:1; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.2s; }
.page-card-delete-btn:hover { background:rgba(220,53,69,0.9); }
.page-move-btn { width:24px; height:24px; border-radius:6px; background:rgba(0,0,0,0.7); color:white; border:none; font-size:14px; line-height:1; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.2s; }
.page-move-btn:hover:not(:disabled) { background:rgba(255,255,255,0.25); }
.page-move-btn:disabled { opacity:0.3; cursor:default; }

/* Viewer navigation */
.viewer-nav-btn { position:absolute; top:50%; transform:translateY(-50%); width:48px; height:48px; border-radius:50%; background:rgba(0,0,0,0.6); border:1px solid rgba(255,255,255,0.2); color:white; font-size:24px; cursor:pointer; display:flex; align-items:center; justify-content:center; z-index:2001; transition:background 0.2s; }
.viewer-nav-btn:hover { background:rgba(0,0,0,0.85); }
.viewer-nav-prev { left:20px; }
.viewer-nav-next { right:20px; }
.viewer-page-indicator { position:absolute; bottom:20px; left:50%; transform:translateX(-50%); background:rgba(0,0,0,0.7); color:white; font-size:13px; padding:6px 16px; border-radius:8px; z-index:2001; }

/* Sidebar bottom */
.sidebar-bottom { margin-top:auto; display:flex; flex-direction:column; gap:10px; }

/* Usage widget (compact, shared desktop + mobile) */
.usage-widget { background:var(--bg-tertiary); border-radius:10px; }
.main-bottom { display:none; margin-top:24px; gap:10px; flex-direction:column; }
.usage-warn { color:var(--error); }

.usage-compact { padding:10px 12px; display:flex; flex-direction:column; gap:6px; }
.usage-compact .usage-row { display:flex; align-items:baseline; justify-content:space-between; gap:8px; flex-wrap:wrap; }
.usage-compact .usage-row-label { font-size:11px; text-transform:uppercase; color:var(--text-secondary); letter-spacing:0.4px; }
.usage-compact .usage-row-val { font-size:12px; color:var(--text-secondary); font-weight:600; text-align:right; }

/* Logout + deploy time row */
.sidebar-bottom-row { display:flex; align-items:center; justify-content:space-between; gap:8px; }
.sidebar-actions { display:flex; align-items:center; gap:8px; }
.deploy-time { font-size:11px; color:var(--text-secondary); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.btn-icon:disabled { opacity:0.5; cursor:not-allowed; }

/* PDF processing modal — fullscreen */
.pdf-fullscreen { position:fixed; inset:0; z-index:1000; display:flex; background:var(--bg-primary); }

.pdf-fs-sidebar { width:260px; flex-shrink:0; background:var(--bg-secondary); border-right:1px solid var(--border); display:flex; flex-direction:column; padding:20px 16px; gap:20px; overflow-y:auto; }
.pdf-fs-title { font-size:16px; font-weight:700; display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:6px; }
.pdf-modal-pager { font-size:12px; color:var(--text-secondary); font-weight:400; }
.pdf-fs-sliders { display:flex; flex-direction:column; gap:18px; flex:1; }
.pdf-slider-row { display:flex; flex-direction:column; gap:6px; }
.pdf-slider-label { font-size:13px; color:var(--text-secondary); }
.pdf-slider { width:100%; accent-color:var(--accent); cursor:pointer; }
.pdf-slider-val { font-size:13px; font-weight:600; color:var(--text-primary); }
.pdf-modal-size { font-size:13px; color:var(--text-secondary); padding:10px 12px; background:var(--bg-tertiary); border-radius:8px; }
.pdf-size-warn { color:var(--error); }
.pdf-fs-actions { display:flex; flex-direction:column; gap:10px; margin-top:auto; }
.pdf-fs-actions .btn-primary, .pdf-fs-actions .btn-secondary { width:100%; padding:12px; font-size:14px; }
.pdf-fs-actions .btn-primary:disabled { opacity:0.5; cursor:not-allowed; }

.pdf-fs-main { flex:1; min-width:0; display:flex; flex-direction:column; }
.pdf-fs-toolbar { display:flex; align-items:center; gap:8px; padding:8px 16px; background:var(--bg-secondary); border-bottom:1px solid var(--border); }
.pdf-zoom-btn { width:32px; height:32px; border-radius:8px; border:1px solid var(--border); background:var(--bg-tertiary); color:var(--text-primary); font-size:18px; line-height:1; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.15s; }
.pdf-zoom-btn:hover { background:var(--border); }
.pdf-zoom-val { font-size:13px; font-weight:600; color:var(--text-secondary); min-width:48px; text-align:center; cursor:pointer; user-select:none; }
.pdf-zoom-val:hover { color:var(--text-primary); }

.pdf-fs-scroll { flex:1; overflow:auto; display:flex; justify-content:center; padding:24px; user-select:none; }
.pdf-modal-canvas { display:block; image-rendering:auto; }
.pdf-modal-loading { flex:1; display:flex; align-items:center; justify-content:center; color:var(--text-secondary); font-size:15px; }

@media (max-width:640px) {
  .pdf-fullscreen { flex-direction:column; }
  .pdf-fs-sidebar { width:100%; flex-shrink:0; max-height:50vh; border-right:none; border-bottom:1px solid var(--border); }
  .pdf-fs-sliders { flex-direction:row; flex-wrap:wrap; gap:12px; }
  .pdf-slider-row { flex:1; min-width:140px; }
  .pdf-fs-actions { flex-direction:row; margin-top:0; }
  .pdf-fs-actions .btn-primary, .pdf-fs-actions .btn-secondary { flex:1; }
}

/* PDF viewer */
.pdf-viewer-overlay { position:fixed; inset:0; background:var(--bg-primary); z-index:2000; display:flex; flex-direction:column; }
.pdf-viewer-header { padding:12px 20px; display:flex; align-items:center; justify-content:space-between; background:var(--bg-secondary); border-bottom:1px solid var(--border); gap:12px; width:100%; box-sizing:border-box; }
.pdf-viewer-title { font-size:14px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; flex:0 1 auto; min-width:0; }
.pdf-viewer-toolbar { display:flex; align-items:center; gap:8px; flex:0 0 auto; }
.pdf-viewer-actions { display:flex; align-items:center; gap:8px; flex:0 0 auto; margin-left:auto; }
.pdf-viewer-action-btn { width:32px; height:32px; border-radius:8px; border:1px solid var(--border); background:var(--bg-tertiary); color:var(--text-primary); font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.15s; }
.pdf-viewer-action-btn:hover { background:var(--border); }
.pdf-viewer-zoom-btn { width:32px; height:32px; border-radius:8px; border:1px solid var(--border); background:var(--bg-tertiary); color:var(--text-primary); font-size:16px; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:background 0.15s; }
.pdf-viewer-zoom-btn:hover { background:var(--border); }
.pdf-viewer-zoom-val { font-size:13px; font-weight:600; color:var(--text-secondary); min-width:44px; text-align:center; }
.pdf-viewer-body { flex:1; min-height:0; display:flex; flex-direction:column; position:relative; }
.pdf-viewer-loading, .pdf-viewer-error { flex:1; display:flex; align-items:center; justify-content:center; color:var(--text-secondary); font-size:15px; padding:20px; text-align:center; }
.pdf-viewer-error { color:var(--error); }
.pdf-viewer-scroll { flex:1; overflow:auto; padding:24px; }
.pdf-viewer-page { display:block; background:white; box-shadow:0 4px 16px rgba(0,0,0,0.4); margin:0 auto 16px; }

/* Mobile */
@media (max-width:768px) {
  .app-layout { flex-direction:column; }
  .app-sidebar { width:100%; height:auto; position:relative; border-right:none; border-bottom:1px solid var(--border); }
  .app-main { margin-left:0; padding:12px; }
  .files-grid { grid-template-columns:repeat(3,1fr); gap:8px; }
  .file-card-menu-btn { opacity:1; }
  .file-card-menu { display:flex; flex-wrap:wrap; width:84px; }
  .sidebar-bottom { display:none; }
  .main-bottom { display:flex; }
}