html { scroll-behavior: smooth; }
:root { --bg: #050507; --card: #0d0d10; --accent: #3b82f6; --text: #f0f0f0; --border: #1c1c21; --sidebar-bg: #0a0a0c; --muted: #888; }
[data-theme="light"] { --bg: #f7f7f9; --card: #ffffff; --accent: #2563eb; --text: #17171a; --border: #e4e4e8; --sidebar-bg: #ffffff; --muted: #666; --hover: #f0f0f3; }
:root { --hover: #16161a; }
body { background-color: var(--bg); color: var(--text); font-family: 'Inter', sans-serif; min-height: 100vh; transition: background-color 0.25s ease, color 0.25s ease; overflow-x: hidden; margin: 0; }

/* Focus visibility for keyboard navigation */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
    outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px;
}
.skip-link { position: absolute; top: -50px; left: 10px; background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 10001; transition: top 0.2s; text-decoration: none; font-size: 13px; }
.skip-link:focus { top: 10px; }

/* Micro-interactions */
button, .tool-card, .nav-item { transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease; }
button:active { transform: scale(0.97); }
.tool-card:active { transform: translateY(-2px) scale(0.98); }
main { animation: page-fade-in 0.25s ease; }
@keyframes page-fade-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
aside {
    width: 260px; background: var(--sidebar-bg); border-right: 1px solid var(--border);
    display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 50;
    transition: transform 0.3s ease;
}
@media (max-width: 768px) {
    aside { transform: translateX(-100%); }
    aside.active { transform: translateX(0); }
    main { margin-left: 0 !important; padding: 20px !important; }
}
.nav-item { padding: 10px 20px; font-size: 13px; font-weight: 500; color: var(--muted); display: flex; align-items: center; gap: 12px; cursor: pointer; transition: 0.2s; text-decoration: none; }
.nav-item:hover { background: var(--hover); color: var(--text); }
.nav-item.active { background: var(--hover); color: var(--accent); border-right: 3px solid var(--accent); }
main { margin-left: 260px; padding: 40px; min-height: 100vh; }
.cyber-card { background: var(--card); border: 1px solid var(--border); border-radius: 20px; padding: 24px; width: 100%; }
.tool-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 20px; text-decoration: none; color: var(--text); display: block; transition: 0.2s; }
.tool-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.modal { display: none; position: fixed; z-index: 100; left: 0; top: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.85); backdrop-filter: blur(8px); }
.modal-content { background: var(--card); margin: 10% auto; padding: 30px; border: 1px solid var(--border); width: 90%; max-width: 600px; border-radius: 24px; max-height: 80vh; overflow-y: auto; }
.loader { border: 3px solid #222; border-top: 3px solid var(--accent); border-radius: 50%; width: 30px; height: 30px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
.hidden { display: none !important; }
.mobile-header { display: none; background: var(--sidebar-bg); padding: 15px 20px; border-bottom: 1px solid var(--border); justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 40; }
@media (max-width: 768px) { .mobile-header { display: flex; } }

/* Sidebar nav scrollbar - hardcoded here (not left to Tailwind's async CDN classes,
   which compile after first paint and cause a flash/race on load) */
.sidebar-nav-scroll {
    flex: 1 1 0% !important;
    min-height: 0 !important;
    overflow-y: scroll !important;
    scrollbar-width: thin;
    scrollbar-color: #5a5a68 transparent;
}
.sidebar-nav-scroll::-webkit-scrollbar { width: 10px; }
.sidebar-nav-scroll::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav-scroll::-webkit-scrollbar-thumb { background-color: #5a5a68; border-radius: 8px; border: 2px solid var(--sidebar-bg); }
.sidebar-nav-scroll::-webkit-scrollbar-thumb:hover { background-color: var(--accent); }

/* Toasts */
#toast-stack { position: fixed; bottom: 20px; left: 20px; z-index: 10000; display: flex; flex-direction: column; gap: 10px; max-width: 320px; }
.toast { background: var(--hover); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 10px; padding: 12px 16px; font-size: 12px; color: #ddd; box-shadow: 0 8px 20px rgba(0,0,0,0.4); animation: toast-in 0.25s ease; }
.toast.error { border-left-color: #ef4444; }
.toast.success { border-left-color: #22c55e; }
@keyframes toast-in { from { transform: translateY(10px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Dropzone */
.dropzone { border: 2px dashed var(--border); border-radius: 14px; padding: 24px; text-align: center; cursor: pointer; transition: 0.2s; background: var(--bg); }
.dropzone:hover, .dropzone.drag-over { border-color: var(--accent); background: rgba(59,130,246,0.06); }
.dropzone .dz-icon { font-size: 22px; color: #444; margin-bottom: 8px; }
.dropzone.drag-over .dz-icon { color: var(--accent); }
.dz-filelist { margin-top: 10px; font-size: 11px; color: var(--muted); text-align: left; }

/* Background color swatches */
.bg-swatch { width: 34px; height: 34px; border-radius: 8px; border: 2px solid #333; cursor: pointer; padding: 0; }
.bg-swatch.selected { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(59,130,246,0.4); }

/* Page thumbnail picker (Reorder / Delete Pages) */
.page-thumb { position: relative; border: 2px solid var(--border); border-radius: 10px; overflow: hidden; cursor: pointer; background: #000; transition: border-color 0.15s ease, transform 0.15s ease; }
.page-thumb:hover { border-color: var(--accent); transform: translateY(-2px); }
.page-thumb canvas { display: block; width: 100%; height: auto; }
.page-thumb .page-thumb-label { position: absolute; bottom: 0; left: 0; right: 0; background: rgba(0,0,0,0.7); color: #ccc; font-size: 10px; text-align: center; padding: 2px 0; }
.page-thumb .page-thumb-badge { position: absolute; top: 4px; left: 4px; background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.page-thumb.marked-delete { border-color: #ef4444; opacity: 0.55; }
.page-thumb.marked-delete::after { content: '\f2ed'; font-family: 'Font Awesome 6 Free'; font-weight: 900; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 22px; color: #ef4444; background: rgba(0,0,0,0.4); }
.page-thumb-loading { display: flex; align-items: center; justify-content: center; aspect-ratio: 0.75; color: var(--muted); font-size: 11px; }

/* Theme toggle */
.theme-toggle-btn { background: none; border: 1px solid var(--border); color: var(--muted); width: 32px; height: 32px; border-radius: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 13px; }
.theme-toggle-btn:hover { color: var(--text); border-color: var(--accent); }

/* Command palette */
#cmdk-overlay { display: none; position: fixed; inset: 0; z-index: 10002; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); align-items: flex-start; justify-content: center; padding-top: 12vh; }
#cmdk-overlay.open { display: flex; }
#cmdk-box { background: var(--card); border: 1px solid var(--border); border-radius: 16px; width: 90%; max-width: 520px; max-height: 60vh; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.5); display: flex; flex-direction: column; }
#cmdk-input { width: 100%; background: transparent; border: none; border-bottom: 1px solid var(--border); padding: 16px 18px; font-size: 14px; color: var(--text); outline: none; box-sizing: border-box; }
#cmdk-results { overflow-y: auto; padding: 8px; }
.cmdk-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; cursor: pointer; font-size: 13px; color: var(--text); }
.cmdk-item.active, .cmdk-item:hover { background: var(--hover); }
.cmdk-item i { color: var(--accent); width: 16px; }
.cmdk-section-label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 8px 12px 4px; }
.cmdk-empty { padding: 20px; text-align: center; color: var(--muted); font-size: 12px; }
.cmdk-trigger { display: flex; align-items: center; gap: 8px; background: var(--sidebar-bg); border: 1px solid var(--border); color: var(--muted); border-radius: 8px; padding: 8px 12px; font-size: 12px; cursor: pointer; width: 100%; }
.cmdk-trigger kbd { background: var(--border); padding: 1px 6px; border-radius: 4px; font-size: 10px; }