:root,[data-theme=light]{--color-bg: #ffffff;--color-surface: #f4f4f5;--color-text: #18181b;--color-text-secondary: #71717a;--color-border: #e4e4e7;--color-accent: #6366f1;--color-accent-hover: #4f46e5;--color-online: #22c55e;--color-stale: #f59e0b;--color-offline: #a1a1aa;--color-danger: #ef4444;--sidebar-width: 30%;--border-radius: 6px;--transition: .15s ease}[data-theme=dark]{--color-bg: #09090b;--color-surface: #18181b;--color-text: #fafafa;--color-text-secondary: #a1a1aa;--color-border: #27272a;--color-accent: #818cf8;--color-accent-hover: #6366f1;--color-online: #4ade80;--color-stale: #fbbf24;--color-offline: #52525b;--color-danger: #f87171}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.5;background:var(--color-bg);color:var(--color-text);height:100vh;overflow:hidden}button{cursor:pointer;font-family:inherit;font-size:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-to-content{position:absolute;top:-100%;left:0;z-index:9999;padding:8px 16px;background:var(--color-accent);color:#fff;font-weight:600;text-decoration:none;border-radius:0 0 var(--border-radius) 0;transition:top .1s}.skip-to-content:focus-visible{top:0;outline:none}.app-shell{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:200px;max-width:320px;display:flex;flex-direction:column;background:var(--color-surface);border-right:1px solid var(--color-border);overflow:hidden}.sidebar__header{padding:12px 16px;font-weight:600;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--color-border);flex-shrink:0}.sidebar__content{flex:1;overflow-y:auto}.sidebar__footer{padding:8px 12px;border-top:1px solid var(--color-border);flex-shrink:0;display:flex;align-items:center;gap:8px}.chat-panel{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--color-bg)}.chat-panel__empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--color-text-secondary)}.conversation-list{height:100%}.conversation-list ul{list-style:none;padding:0;margin:0}.conversation-list__item button{display:flex;align-items:center;gap:8px;width:100%;padding:10px 16px;background:transparent;border:none;text-align:left;color:var(--color-text);transition:background var(--transition)}.conversation-list__item button:hover{background:var(--color-bg)}.conversation-list__item--active button{background:color-mix(in srgb,var(--color-accent) 12%,transparent)}.conversation-list__name{font-weight:500;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conversation-list__unread{background:var(--color-accent);color:#fff;font-size:11px;font-weight:600;padding:1px 6px;border-radius:10px;flex-shrink:0}.conversation-list__preview{font-size:12px;color:var(--color-text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex-basis:100%;padding-left:18px;margin-top:-4px}.message-thread{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px}.message-bubble{max-width:70%;padding:8px 12px;border-radius:var(--border-radius);word-break:break-word}.message-bubble--local{align-self:flex-end;background:var(--color-accent);color:#fff}.message-bubble--remote{align-self:flex-start;background:var(--color-surface);color:var(--color-text)}.message-bubble__sender{display:block;font-size:11px;font-weight:600;margin-bottom:2px;opacity:.75}.message-bubble__text{margin:0}.message-bubble__meta{display:block;font-size:11px;opacity:.65;margin-top:4px;text-align:right}.input-bar{display:flex;align-items:flex-end;gap:8px;padding:12px 16px;border-top:1px solid var(--color-border);background:var(--color-surface)}.input-bar__textarea{flex:1;resize:none;border:1px solid var(--color-border);border-radius:var(--border-radius);padding:8px 10px;background:var(--color-bg);color:var(--color-text);font-family:inherit;font-size:14px;max-height:120px}.input-bar__counter{font-size:11px;color:var(--color-text-secondary);flex-shrink:0;align-self:center}.input-bar__counter--over{color:var(--color-danger);font-weight:600}.input-bar__send,.input-bar__attach{background:var(--color-accent);color:#fff;border:none;border-radius:var(--border-radius);padding:8px 14px;font-weight:500;transition:background var(--transition);flex-shrink:0}.input-bar__send:hover,.input-bar__attach:hover{background:var(--color-accent-hover)}.input-bar__send:disabled{opacity:.45;cursor:not-allowed}.settings-panel{padding:24px;max-width:480px;display:flex;flex-direction:column;gap:24px}.settings-panel__title{font-size:18px;font-weight:600}.settings-panel__section{display:flex;flex-direction:column;gap:8px}.settings-panel__label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-secondary)}.settings-panel__peer-id{display:flex;align-items:center;gap:8px;font-family:SF Mono,Fira Code,monospace;font-size:11px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--border-radius);padding:8px 10px;word-break:break-all;color:var(--color-text-secondary)}.settings-panel__theme-group{display:flex;gap:8px}.settings-panel__theme-btn{flex:1;padding:8px;border:1px solid var(--color-border);border-radius:var(--border-radius);background:transparent;color:var(--color-text);font-size:13px;transition:border-color var(--transition),background var(--transition)}.settings-panel__theme-btn:hover{border-color:var(--color-accent)}.settings-panel__theme-btn--active{border-color:var(--color-accent);background:color-mix(in srgb,var(--color-accent) 10%,transparent);color:var(--color-accent);font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:var(--border-radius);padding:8px 16px;font-weight:500;transition:background var(--transition),opacity var(--transition)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn--primary{background:var(--color-accent);color:#fff}.btn--primary:hover:not(:disabled){background:var(--color-accent-hover)}.btn--secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn--secondary:hover:not(:disabled){background:var(--color-border)}.btn--danger{background:var(--color-danger);color:#fff}.input-field{display:flex;flex-direction:column;gap:4px}.input-field__label{font-size:12px;font-weight:600;color:var(--color-text-secondary)}.input-field__input{border:1px solid var(--color-border);border-radius:var(--border-radius);padding:8px 10px;background:var(--color-bg);color:var(--color-text);font-family:inherit;font-size:14px}.input-field__input--error{border-color:var(--color-danger)}.input-field__error{font-size:12px;color:var(--color-danger)}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--color-bg);border:1px solid var(--color-border);border-radius:8px;min-width:320px;max-width:90vw}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--color-border);font-weight:600}.modal-header button{background:none;border:none;font-size:16px;color:var(--color-text-secondary);padding:4px;line-height:1}.modal-body{padding:20px}.input-bar--drag-over{border:2px dashed var(--color-accent);background:color-mix(in srgb,var(--color-accent) 6%,var(--color-surface))}.input-bar__row{display:flex;align-items:flex-end;gap:8px;width:100%}.input-bar__attachment{display:flex;align-items:center;gap:8px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--border-radius);padding:6px 10px;margin-bottom:6px;width:100%;flex-wrap:wrap}.input-bar__attachment-thumb{width:40px;height:40px;object-fit:cover;border-radius:4px;flex-shrink:0}.input-bar__attachment-icon{font-size:20px;flex-shrink:0}.input-bar__attachment-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.input-bar__attachment-size{color:var(--color-text-secondary);font-size:11px}.input-bar__attachment-remove{background:none;border:none;color:var(--color-text-secondary);font-size:14px;padding:2px 4px;line-height:1;flex-shrink:0}.input-bar__attachment-remove:hover{color:var(--color-danger)}.input-bar__error{font-size:12px;color:var(--color-danger);margin-bottom:4px;width:100%}.attachment{margin-top:6px;font-size:13px}.attachment--progress{display:flex;flex-direction:column;gap:4px}.attachment__name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attachment__progress-bar{height:6px;background:color-mix(in srgb,currentColor 20%,transparent);border-radius:3px;overflow:hidden}.attachment__progress-fill{height:100%;background:var(--color-accent);border-radius:3px;transition:width .2s ease}.attachment__percent{font-size:11px;opacity:.7}.attachment--complete{display:flex;flex-direction:column;gap:6px}.attachment__thumbnail{border-radius:4px;display:block;max-width:240px}.attachment__download-link{display:inline-flex;align-items:center;gap:4px;color:inherit;text-decoration:underline;font-size:13px;word-break:break-all}.attachment__size{color:var(--color-text-secondary);font-size:11px}.attachment--failed{color:var(--color-danger);font-size:13px}.attachment__error{font-style:italic}.reconnect-banner{position:fixed;top:0;left:0;right:0;z-index:2000;display:flex;align-items:center;justify-content:center;gap:8px;padding:8px 16px;background:var(--color-stale);color:#000;font-size:13px;font-weight:500}.reconnect-banner--disconnected{background:var(--color-surface-raised, #e8e8e8);color:var(--color-text-secondary, #555);font-weight:400}.reconnect-banner__spinner{display:inline-block;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}