:root{--brand-500: #6366f1;--brand-600: #4f46e5;--brand-700: #4338ca;--brand-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 55%, #ec4899 100%);--bg: #f6f7fb;--surface: #ffffff;--surface-2: #f1f3f9;--surface-hover: #eceff7;--border: #e3e6ef;--border-strong: #d2d7e4;--text: #1a1d29;--text-muted: #626878;--text-faint: #9aa0b0;--on-brand: #ffffff;--success: #16a34a;--success-bg: #e8f7ee;--warning: #b45309;--warning-bg: #fef3e2;--danger: #dc2626;--danger-bg: #fdecec;--shadow-sm: 0 1px 2px rgba(20, 24, 40, .06), 0 1px 3px rgba(20, 24, 40, .05);--shadow-md: 0 4px 12px rgba(20, 24, 40, .08), 0 2px 4px rgba(20, 24, 40, .05);--shadow-lg: 0 16px 48px rgba(20, 24, 40, .18);--r-sm: 8px;--r-md: 12px;--r-lg: 18px;--r-full: 999px;--ease: cubic-bezier(.22, .61, .36, 1);--header-h: 60px;--sidebar-w: 280px;--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace}@media (prefers-color-scheme: dark){:root{--bg: #0d0f16;--surface: #151824;--surface-2: #1b1f2e;--surface-hover: #222739;--border: #262b3d;--border-strong: #333a52;--text: #eef0f6;--text-muted: #a2a9bd;--text-faint: #6b7288;--success-bg: #12261a;--warning-bg: #2a2011;--danger-bg: #2a1516;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 6px 18px rgba(0, 0, 0, .45);--shadow-lg: 0 20px 56px rgba(0, 0, 0, .6)}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font);line-height:1.55;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}button,a,input,textarea,select{font:inherit;color:inherit}*:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}::selection{background:color-mix(in srgb,var(--brand-500) 30%,transparent)}.app-shell{display:flex;flex-direction:column;height:100dvh;overflow:hidden}.app-body{flex:1;display:flex;min-height:0;position:relative}.app-header{height:var(--header-h);flex-shrink:0;display:flex;align-items:center;gap:.75rem;padding:0 1rem;background:var(--surface);border-bottom:1px solid var(--border);z-index:40}.app-header h1{font-size:1.15rem;font-weight:700;letter-spacing:-.02em;display:flex;align-items:center;gap:.5rem}.brand-mark{width:26px;height:26px;border-radius:8px;background:var(--brand-gradient);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800;box-shadow:var(--shadow-sm)}.brand-name .brand-accent{background:var(--brand-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.header-spacer{flex:1}.header-btn{background:var(--surface);border:1px solid var(--border-strong);color:var(--text);padding:.45rem .85rem;border-radius:var(--r-full);font-size:.82rem;font-weight:500;cursor:pointer;transition:all .15s var(--ease);white-space:nowrap}.header-btn:hover{background:var(--surface-hover);border-color:var(--brand-500)}@media (max-width: 519px){.header-btn{display:none}}.hamburger{background:transparent;border:none;color:var(--text-muted);font-size:1.35rem;cursor:pointer;width:44px;height:44px;border-radius:var(--r-sm);display:inline-flex;align-items:center;justify-content:center;transition:background .15s var(--ease),color .15s var(--ease)}.hamburger:hover{background:var(--surface-hover);color:var(--text)}.auth-bar{display:flex;align-items:center;gap:.5rem;font-size:.85rem}.auth-bar span{color:var(--text-muted)}.auth-link{display:inline-flex;align-items:center;gap:.35rem;padding:.45rem .85rem;border-radius:var(--r-full);border:1px solid var(--border-strong);background:var(--surface);color:var(--text);text-decoration:none;font-size:.82rem;font-weight:500;cursor:pointer;transition:all .15s var(--ease);white-space:nowrap}.auth-link:hover{background:var(--surface-hover);border-color:var(--brand-500)}.auth-link[data-provider=google]:before{content:"G";font-weight:800;color:#ea4335}.auth-link[data-provider=github]:before{content:"⚙"}.auth-link[data-role=logout]{border-color:var(--border);color:var(--text-muted)}.file-drawer{width:var(--sidebar-w);flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0;z-index:30}.drawer-header{padding:1rem 1rem .75rem;display:flex;align-items:center;justify-content:space-between;gap:.5rem}.drawer-header h2{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint)}.upload-btn{background:var(--brand-gradient);color:#fff;padding:.5rem .9rem;border-radius:var(--r-full);cursor:pointer;display:inline-flex;align-items:center;gap:.35rem;font-size:.82rem;font-weight:600;box-shadow:var(--shadow-sm);transition:transform .12s var(--ease),box-shadow .15s var(--ease),filter .15s var(--ease)}.upload-btn:before{content:"↑";font-weight:800}.upload-btn:hover{filter:brightness(1.06);box-shadow:var(--shadow-md)}.upload-btn:active{transform:translateY(1px)}.upload-btn input[type=file]{display:none}[data-role=file-drawer]{list-style:none;padding:.25rem .5rem 1rem;overflow-y:auto;flex:1;min-height:0}[data-role=file-drawer] li{display:flex;align-items:center;border-radius:var(--r-sm);margin-bottom:2px;transition:background .12s var(--ease)}[data-role=file-drawer] li:hover{background:var(--surface-hover)}[data-role=file-drawer] li.active{background:color-mix(in srgb,var(--brand-500) 14%,transparent)}[data-role=file-drawer] li.active .file-item{color:var(--brand-600);font-weight:600}.file-item{flex:1;min-width:0;background:transparent;border:none;padding:.6rem .5rem .6rem .65rem;text-align:left;cursor:pointer;font-size:.88rem;display:flex;align-items:center;gap:.55rem;color:var(--text)}.file-item .file-icon{flex-shrink:0;width:24px;height:24px;border-radius:6px;background:var(--surface-2);display:inline-flex;align-items:center;justify-content:center;font-size:.8rem}.file-item .file-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.delete-btn{background:transparent;border:none;cursor:pointer;width:40px;height:40px;border-radius:var(--r-sm);font-size:.95rem;color:var(--text-faint);opacity:0;transition:opacity .12s var(--ease),color .12s var(--ease),background .12s var(--ease)}[data-role=file-drawer] li:hover .delete-btn,[data-role=file-drawer] li.active .delete-btn{opacity:1}.delete-btn:hover{color:var(--danger);background:var(--danger-bg)}.drawer-empty{padding:1.5rem 1rem;text-align:center;color:var(--text-faint);font-size:.82rem}.storage-hint{padding:.75rem 1rem;border-top:1px solid var(--border);font-size:.72rem;color:var(--text-faint);display:flex;align-items:center;gap:.4rem}.editor-area{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden;background:var(--bg)}[data-role=editor-host]{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.1rem;padding:2rem;text-align:center}.empty-state .dropzone{width:min(520px,100%);border:2px dashed var(--border-strong);border-radius:var(--r-lg);background:var(--surface);padding:2.5rem 2rem;display:flex;flex-direction:column;align-items:center;gap:.9rem;cursor:pointer;transition:border-color .18s var(--ease),background .18s var(--ease),transform .18s var(--ease)}.empty-state .dropzone:hover{border-color:var(--brand-500)}.app-body.drag-active .empty-state .dropzone,.empty-state .dropzone.drag-over{border-color:var(--brand-500);background:color-mix(in srgb,var(--brand-500) 8%,var(--surface));transform:scale(1.01)}.empty-state .drop-icon{width:64px;height:64px;border-radius:var(--r-md);background:var(--brand-gradient);display:flex;align-items:center;justify-content:center;font-size:1.8rem;color:#fff;box-shadow:var(--shadow-md)}.empty-state h2{font-size:1.35rem;font-weight:700;letter-spacing:-.02em}.empty-state p{color:var(--text-muted);max-width:40ch;font-size:.92rem}.empty-state .browse-btn{background:var(--brand-gradient);color:#fff;border:none;padding:.7rem 1.5rem;border-radius:var(--r-full);font-weight:600;cursor:pointer;box-shadow:var(--shadow-sm);transition:transform .12s var(--ease),filter .15s var(--ease)}.empty-state .browse-btn:hover{filter:brightness(1.06)}.empty-state .browse-btn:active{transform:translateY(1px)}.empty-state .kbd-hint{font-size:.78rem;color:var(--text-faint)}.empty-state kbd{font-family:var(--mono);font-size:.72rem;background:var(--surface-2);border:1px solid var(--border);border-bottom-width:2px;border-radius:6px;padding:.1rem .4rem}.drop-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:60;display:none;align-items:center;justify-content:center;background:color-mix(in srgb,var(--brand-500) 12%,transparent);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border:3px dashed var(--brand-500);border-radius:var(--r-md);pointer-events:none;font-weight:600;color:var(--brand-600)}.app-body.drag-active .drop-overlay{display:flex}.toolbar{flex-shrink:0;padding:.55rem .75rem;border-bottom:1px solid var(--border);display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;background:var(--surface)}.toolbar .push-right{margin-left:auto}.toolbar button{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:.45rem .9rem;border-radius:var(--r-sm);cursor:pointer;font-size:.82rem;font-weight:500;transition:all .13s var(--ease)}.toolbar button:hover{background:var(--surface-hover);border-color:var(--border-strong)}.toolbar button:active{transform:translateY(1px)}.toolbar .share-btn{background:var(--brand-gradient);color:#fff;border:none;font-weight:600;box-shadow:var(--shadow-sm)}.toolbar .share-btn:before{content:"🔗";margin-right:.35rem}.toolbar .share-btn:hover{filter:brightness(1.06)}.cm-editor{flex:1;overflow:auto;font-size:14px;min-height:0}.cm-editor .cm-scroller{font-family:var(--mono)}.preview-pane{flex:1;overflow:auto;padding:1.25rem 1.5rem;border-left:1px solid var(--border);background:var(--surface);min-height:0}.preview-pane iframe{min-height:400px;width:100%;border:0}.image-canvas{max-width:100%;height:auto;display:block;margin:1.5rem auto;border-radius:var(--r-sm);box-shadow:var(--shadow-md)}.binary-preview{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}.binary-head{flex-shrink:0;display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-bottom:1px solid var(--border);background:var(--surface)}.binary-meta{display:flex;align-items:center;gap:.6rem;min-width:0;font-size:.9rem;font-weight:500}.binary-meta span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.binary-meta .file-icon{flex-shrink:0;width:28px;height:28px;border-radius:8px;background:var(--surface-2);display:inline-flex;align-items:center;justify-content:center}.download-btn{margin-left:auto;flex-shrink:0;background:var(--brand-gradient);color:#fff;text-decoration:none;padding:.45rem 1rem;border-radius:var(--r-full);font-size:.82rem;font-weight:600;box-shadow:var(--shadow-sm);transition:filter .15s var(--ease)}.download-btn:before{content:"↓";margin-right:.35rem;font-weight:800}.download-btn:hover{filter:brightness(1.06)}.binary-body{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:1.5rem;overflow:auto;background:var(--bg)}.media-el{max-width:100%;max-height:100%;border-radius:var(--r-md);box-shadow:var(--shadow-md);background:#000}.media-el.audio{width:min(520px,100%);box-shadow:none;background:transparent}.media-el.pdf{width:100%;height:100%;border:0;background:var(--surface);box-shadow:var(--shadow-sm)}.binary-none{text-align:center;color:var(--text-muted);max-width:420px;display:flex;flex-direction:column;align-items:center;gap:1rem}.binary-none .drop-icon{width:64px;height:64px;border-radius:var(--r-md);background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-size:1.8rem}.binary-none p{font-size:.92rem}.command-palette-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0c1480;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;display:flex;align-items:flex-start;justify-content:center;padding-top:12vh}.command-palette{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-lg);width:92%;max-width:600px;overflow:hidden}.command-palette input{width:100%;padding:1rem 1.15rem;border:none;border-bottom:1px solid var(--border);font-size:1rem;background:transparent;min-height:54px}.command-palette input::placeholder{color:var(--text-faint)}.command-palette ul{list-style:none;max-height:400px;overflow-y:auto;padding:.4rem}.command-palette li{padding:.7rem .85rem;cursor:pointer;border-radius:var(--r-sm);display:flex;align-items:center;font-size:.9rem;transition:background .12s var(--ease)}.command-palette li:hover{background:var(--surface-hover)}.command-palette li.selected{background:color-mix(in srgb,var(--brand-500) 16%,transparent)}.ro-banner,.rw-banner{flex-shrink:0;padding:.6rem 1rem;font-size:.85rem;display:flex;align-items:center;justify-content:center;gap:.6rem;flex-wrap:wrap;border-bottom:1px solid var(--border)}.ro-banner{background:var(--warning-bg);color:var(--warning)}.rw-banner{background:var(--success-bg);color:var(--success)}.ro-banner:before{content:"👁"}.rw-banner:before{content:"✎"}.rw-banner button{background:var(--success);color:#fff;border:none;padding:.4rem .9rem;border-radius:var(--r-full);font-size:.8rem;font-weight:600;cursor:pointer;transition:filter .15s var(--ease)}.rw-banner button:hover{filter:brightness(1.08)}.rw-banner [data-role=save-back-status]{font-weight:500}.toast-region{position:fixed;bottom:1.25rem;right:1.25rem;z-index:2000;display:flex;flex-direction:column;gap:.6rem;max-width:min(380px,calc(100vw - 2rem))}.toast{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--brand-500);border-radius:var(--r-md);box-shadow:var(--shadow-lg);padding:.8rem 1rem;font-size:.87rem;color:var(--text);display:flex;align-items:flex-start;gap:.55rem;animation:toast-in .28s var(--ease)}.toast.leaving{animation:toast-out .22s var(--ease) forwards}.toast.success{border-left-color:var(--success)}.toast.error{border-left-color:var(--danger)}.toast.info{border-left-color:var(--brand-500)}.toast:before{font-size:1rem;line-height:1.3}.toast.success:before{content:"✓";color:var(--success)}.toast.error:before{content:"⚠";color:var(--danger)}.toast.info:before{content:"ℹ";color:var(--brand-500)}@keyframes toast-in{0%{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes toast-out{to{opacity:0;transform:translateY(8px) scale(.98)}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a0c148c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1500;display:flex;align-items:center;justify-content:center;padding:1rem;animation:fade-in .18s var(--ease)}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);width:100%;max-width:400px;padding:1.5rem;animation:modal-in .22s var(--ease)}@keyframes modal-in{0%{opacity:0;transform:scale(.96) translateY(8px)}to{opacity:1;transform:none}}.modal h3{font-size:1.05rem;font-weight:700;margin-bottom:.5rem}.modal p{color:var(--text-muted);font-size:.9rem;margin-bottom:1.25rem}.modal-actions{display:flex;gap:.6rem;justify-content:flex-end}.modal-actions button{padding:.55rem 1.1rem;border-radius:var(--r-sm);font-size:.85rem;font-weight:600;cursor:pointer;border:1px solid var(--border-strong);background:var(--surface);color:var(--text);transition:all .13s var(--ease)}.modal-actions .btn-cancel:hover{background:var(--surface-hover)}.modal-actions .btn-danger{background:var(--danger);border-color:var(--danger);color:#fff}.modal-actions .btn-danger:hover{filter:brightness(1.08)}.modal.wide{max-width:min(900px,96vw);display:flex;flex-direction:column;max-height:88vh}.compare-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.compare-head h3{margin:0}.modal-close{background:transparent;border:none;cursor:pointer;width:36px;height:36px;border-radius:var(--r-sm);color:var(--text-muted);font-size:1rem}.modal-close:hover{background:var(--surface-hover);color:var(--text)}.compare-selects{display:flex;align-items:center;gap:.6rem;margin-bottom:1rem}.compare-selects select{flex:1;min-width:0;padding:.5rem .7rem;border:1px solid var(--border-strong);border-radius:var(--r-sm);background:var(--surface);color:var(--text)}.compare-vs{color:var(--text-faint);font-size:.8rem;font-weight:600}.diff-view{flex:1;min-height:0;overflow:auto;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg);font-family:var(--mono);font-size:.82rem;line-height:1.5}.diff-line{padding:0 .75rem;white-space:pre-wrap;word-break:break-word}.diff-eq{color:var(--text-muted)}.diff-add{background:color-mix(in srgb,var(--success) 16%,transparent);color:var(--text)}.diff-del{background:color-mix(in srgb,var(--danger) 14%,transparent);color:var(--text)}.diff-identical{padding:1.5rem;text-align:center;color:var(--text-muted);font-family:var(--font)}@media (max-width: 719px){.file-drawer{position:fixed;top:var(--header-h);left:0;bottom:0;transform:translate(-100%);transition:transform .28s var(--ease);box-shadow:var(--shadow-lg)}.file-drawer.open{transform:translate(0)}.drawer-backdrop{position:fixed;inset:var(--header-h) 0 0 0;background:#0a0c1473;z-index:25;opacity:0;pointer-events:none;transition:opacity .25s var(--ease)}.drawer-backdrop.show{opacity:1;pointer-events:auto}[data-role=editor-host]{flex-direction:column}.preview-pane{border-left:none;border-top:1px solid var(--border)}.auth-bar .auth-link{padding:.4rem .6rem}}@media (min-width: 720px){.hamburger,.drawer-backdrop{display:none}[data-role=editor-host]:has(.preview-pane){flex-direction:row}[data-role=editor-host]:has(.preview-pane) .cm-editor{width:50%}[data-role=editor-host]:has(.preview-pane) .preview-pane{width:50%}}@media (hover: none) and (pointer: coarse){.file-item,.toolbar button,.auth-link{min-height:44px}.delete-btn{opacity:1}}