:root,[data-theme=light]{--bg-page:#f8f9fa;--bg-sidebar:#f6f8fc;--bg-topbar:#fff;--bg-card:#fff;--bg-hover:#f2f6fc;--bg-selected:#c2dbff;--bg-active-nav:#d3e3fd;--bg-input:#fff;--bg-code:#f8f9fa;--bg-compose:#c2e7ff;--border:#e0e0e0;--border-light:#f0f0f0;--border-input:#d0d0d0;--text-primary:#202124;--text-secondary:#5f6368;--text-link:#1a73e8;--text-on-primary:#fff;--accent:#1a73e8;--danger:#ea4335;--success:#137333;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 1px 3px rgba(0,0,0,.08)}[data-theme=dark]{--bg-page:#0f172a;--bg-sidebar:#1e293b;--bg-topbar:#1e293b;--bg-card:#1e293b;--bg-hover:#334155;--bg-selected:#1e40af;--bg-active-nav:#334155;--bg-input:#fff;--bg-code:#1e293b;--bg-compose:#1e3a5f;--border:#334155;--border-light:#1e293b;--border-input:#475569;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-link:#60a5fa;--text-on-primary:#fff;--text-on-input:#202124;--accent:#3b82f6;--danger:#f87171;--success:#34d399;--shadow-sm:0 1px 2px rgba(0,0,0,.2);--shadow-md:0 1px 3px rgba(0,0,0,.3)}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;overflow:auto}body{font-family:Google Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;font-size:14px;color:var(--text-primary);background:var(--bg-page);line-height:1.5;transition:background .2s,color .2s}a{color:inherit;text-decoration:none}.app-shell{display:flex;height:100vh;overflow:hidden;background:var(--bg-page)}.sidebar{width:256px;min-width:256px;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}.sidebar-header{padding:16px 16px 8px;display:flex;align-items:center;gap:8px}.sidebar-header h1{font-size:18px;font-weight:500;color:var(--text-secondary)}.compose-btn{margin:8px 16px;padding:12px 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.icon,.sidebar-nav li button.active .icon{color:var(--text-primary)}.sidebar-folder-link.drag-over{background:var(--bg-selected)!important;outline:2px dashed var(--accent);outline-offset:-2px}.badge-count{margin-left:auto;background:#ea4335;color:#fff;font-size:11px;font-weight:700;min-width:20px;height:20px;border-radius:10px;display:flex;align-items:center;justify-content:center;padding:0 6px}.sidebar-section-label{padding:16px 24px 4px;font-size:12px;font-weight:500;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.main-content{flex:1 1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-page)}.topbar{display:flex;align-items:center;padding:8px 16px;border-bottom:1px solid var(--border);min-height:48px;gap:8px;background:var(--bg-topbar)}.topbar-search{flex:1 1;max-width:720px;padding:8px 16px;background:var(--bg-input);border:1px solid var(--border-input);border-radius:8px;font-size:14px;outline:none;color:var(--text-primary);transition:border-color .15s,box-shadow .15s}.topbar-search:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(59,130,246,.15)}.topbar-actions{display:flex;gap:4px;align-items:center;margin-left:auto}.inbox-list{flex:1 1;overflow-y:auto}.inbox-item{display:flex;align-items:center;padding:8px 16px;border-bottom:1px solid var(--border-light);cursor:pointer;transition:background .1s;gap:12px}.inbox-item:hover{background:var(--bg-hover)}.inbox-item.selected{background:var(--bg-selected)}.inbox-item .avatar{width:32px;height:32px;border-radius:50%;background:var(--bg-hover);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:500;color:var(--text-secondary);flex-shrink:0}.inbox-item .sender{min-width:160px;max-width:160px;font-weight:700}.inbox-item .sender,.inbox-item .subject{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.inbox-item .subject{flex:1 1}.inbox-item .subject .snippet{color:var(--text-secondary);font-weight:400;margin-left:4px}.inbox-item .date{font-size:12px;color:var(--text-secondary);white-space:nowrap;min-width:56px;text-align:right}.inbox-item .tag-badge{font-size:11px;padding:2px 8px;border-radius:4px;font-weight:600;text-transform:uppercase;flex-shrink:0}.tag-draft{background:#fef3c7;color:#92400e}.tag-review{background:#dbeafe;color:#1e40af}.tag-sealed{background:#d1fae5;color:#065f46}.tag-action{background:#fee2e2;color:#991b1b}.tag-signoff{background:#e0e7ff;color:#3730a3}.tag-info{background:#f3f4f6;color:#4b5563}.detail-view{flex:1 1;overflow-y:auto;padding:24px 48px;max-width:960px}.detail-header{margin-bottom:24px}.detail-header h1{font-size:22px;font-weight:400;margin-bottom:8px}.detail-meta{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.detail-meta .avatar-lg{width:40px;height:40px;border-radius:50%;background:var(--bg-hover);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:500;flex-shrink:0}.detail-meta .meta-info{flex:1 1}.detail-meta .meta-name{font-weight:700}.detail-meta .meta-date{font-size:12px;color:var(--text-secondary)}.detail-body{margin-top:16px;font-size:14px;line-height:1.6}.detail-body pre{background:var(--bg-code);border:1px solid var(--border);border-radius:8px;padding:16px;white-space:pre-wrap;word-break:break-word;font-family:SF Mono,Fira Code,Menlo,monospace}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-secondary);gap:16px}.empty-state .empty-icon{font-size:48px;opacity:.5}.loading{justify-content:center;height:100%;color:var(--text-secondary)}.edit-toolbar,.loading{display:flex;align-items:center}.edit-toolbar{gap:2px;padding:6px 8px;background:var(--bg-card);border-radius:8px 8px 0 0;border:1px solid var(--border);border-bottom:none;flex-wrap:wrap;position:-webkit-sticky;position:sticky;top:0;z-index:10}.edit-toolbar .toolbar-group{display:flex;align-items:center;gap:1px;padding:0 4px;border-right:1px solid var(--border-light)}.edit-toolbar .toolbar-group:last-child{border-right:none}.edit-toolbar button{width:30px;height:30px;display:flex;align-items:center;justify-content:center;font-size:13px;background:transparent;border:none;border-radius:4px;cursor:pointer;color:var(--text-secondary);transition:background .1s,color .1s;position:relative}.edit-toolbar button:hover{background:var(--bg-hover);color:var(--text-primary)}.edit-toolbar button.active,.edit-toolbar button:active{background:var(--bg-active-nav)}.edit-toolbar button.active{color:var(--accent)}.edit-toolbar .toolbar-label{font-size:10px;font-weight:600;color:var(--text-secondary);padding:0 4px;text-transform:uppercase;letter-spacing:.3px}.edit-toolbar .toolbar-separator{width:1px;height:20px;background:var(--border-light);margin:0 4px}.edit-toolbar select{height:28px;padding:0 6px;font-size:12px;border:1px solid var(--border);border-radius:4px;background:var(--bg-input);color:var(--text-primary);outline:none;cursor:pointer}.edit-toolbar select:hover{border-color:var(--accent)}.edit-toolbar .attach-btn{position:relative;overflow:hidden}.edit-toolbar .attach-btn input[type=file]{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.emoji-picker{position:absolute;top:100%;left:0;z-index:100;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-md);padding:8px;width:280px;max-height:200px;overflow-y:auto;display:grid;grid-template-columns:repeat(8,1fr);grid-gap:2px;gap:2px}.emoji-picker button{width:30px;height:30px;font-size:18px;display:flex;align-items:center;justify-content:center;background:none;border:none;border-radius:4px;cursor:pointer}.emoji-picker button:hover{background:var(--bg-hover)}.attachment-list{display:flex;flex-wrap:wrap;gap:8px;padding:8px 24px;border-top:1px solid var(--border-light)}.attachment-chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:var(--bg-hover);border:1px solid var(--border);border-radius:6px;font-size:12px;color:var(--text-primary)}.attachment-chip .remove-attach{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:14px;padding:0;line-height:1}.attachment-chip .remove-attach:hover{color:var(--danger)}.state-controls{display:flex;gap:8px;padding:12px 0;flex-wrap:wrap}.state-controls .btn{padding:8px 16px;border:none;border-radius:24px;font-size:14px;font-weight:500;cursor:pointer;transition:box-shadow .15s}.state-controls .btn-primary{background:var(--accent);color:var(--text-on-primary)}.state-controls .btn-secondary{background:var(--bg-hover);color:var(--text-primary)}.state-controls .btn-danger{background:var(--danger);color:var(--text-on-primary)}.state-controls .btn:hover{box-shadow:0 1px 3px rgba(0,0,0,.2)}.state-controls .btn:disabled{opacity:.5;cursor:not-allowed}.revision-list{display:flex;flex-direction:column;gap:8px}.revision-item{display:flex;align-items:center;justify-content:space-between;padding:12px;background:var(--bg-code);border-radius:8px;border:1px solid transparent}.revision-item.current{background:var(--bg-selected);border-color:var(--accent)}.seal-warning{padding:12px;background:#fef7e0;border:1px solid #fde293;border-radius:8px;margin-bottom:16px}[data-theme=dark] .seal-warning{background:#422006;border-color:#78350f;color:#fbbf24}.settings-content{flex:1 1;overflow-y:auto;padding:32px 48px;max-width:800px;margin:0 auto;width:100%}.settings-section{margin-bottom:32px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:24px;box-shadow:var(--shadow-sm)}.settings-section-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:8px}.settings-description{font-size:13px;color:var(--text-secondary);margin-bottom:16px;line-height:1.5}.settings-row{margin-bottom:16px}.settings-label{display:block;font-size:13px;font-weight:500;color:var(--text-primary);margin-bottom:6px}.settings-textarea{width:100%;padding:10px 14px;font-size:14px;font-family:inherit;border:1px solid var(--border-input);border-radius:8px;background:var(--bg-input);color:var(--text-primary);outline:none;resize:vertical;transition:border-color .15s,box-shadow .15s}.settings-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(59,130,246,.15)}.settings-input{flex:1 1;padding:8px 12px;font-size:14px;font-family:inherit;border:1px solid var(--border-input);border-radius:8px;background:var(--bg-input);color:var(--text-primary);outline:none;transition:border-color .15s,box-shadow .15s}.settings-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px rgba(59,130,246,.15)}.settings-input::placeholder{color:var(--text-secondary);opacity:.6}.settings-add-btn{padding:8px 16px;border:none;border-radius:8px;background:var(--accent);color:var(--text-on-primary);font-size:14px;font-weight:500;cursor:pointer;white-space:nowrap;transition:opacity .15s}.settings-add-btn:hover{opacity:.9}.tag-list{display:flex;flex-wrap:wrap;gap:8px}.tag-chip{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background:var(--bg-active-nav);border-radius:16px;font-size:13px;color:var(--text-primary);border:1px solid var(--border)}.tag-remove{background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:12px;padding:0;line-height:1}.tag-remove:hover{color:var(--danger)}.drag-handle{cursor:-webkit-grab;cursor:grab;color:var(--text-secondary);font-size:14px;-webkit-user-select:none;-moz-user-select:none;user-select:none}.drag-handle:active{cursor:-webkit-grabbing;cursor:grabbing}.theme-toggle{display:flex;gap:8px}.theme-btn{padding:10px 24px;border:1px solid var(--border-input);border-radius:8px;background:var(--bg-input);color:var(--text-primary);font-size:14px;cursor:pointer;transition:background .15s,border-color .15s,box-shadow .15s}.theme-btn:hover{background:var(--bg-hover);border-color:var(--accent)}.theme-btn-active{background:var(--accent);color:var(--text-on-primary);border-color:var(--accent);box-shadow:0 0 0 2px rgba(59,130,246,.25)}.settings-actions{border-top:1px solid var(--border);background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:24px;box-shadow:var(--shadow-sm)}.settings-actions .btn{padding:10px 32px;border:none;border-radius:24px;font-size:14px;font-weight:500;cursor:pointer;transition:box-shadow .15s,background .15s}.settings-actions .btn-primary{background:var(--accent);color:var(--text-on-primary)}.settings-actions .btn-primary:hover{box-shadow:0 1px 3px rgba(0,0,0,.2);opacity:.9}.settings-actions .btn-primary:active{opacity:.8}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}