:root{--bg: #f4f5f7;--panel: #ffffff;--border: #e1e4e8;--text: #1b1f23;--accent: #4262ff;--accent-weak: #eaeeff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;width:100%;overflow:hidden}body{background:var(--bg);color:var(--text)}.app{position:relative;height:100vh;width:100vw}.toolbar{position:absolute;top:16px;left:50%;transform:translate(-50%);z-index:10;display:flex;gap:4px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:0 6px 24px #00000014}.tool-btn{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:56px;padding:8px 10px;border:none;border-radius:8px;background:transparent;color:var(--text);font-size:11px;cursor:pointer;transition:background .12s ease}.tool-btn:hover{background:var(--bg)}.tool-btn.active{background:var(--accent-weak);color:var(--accent)}.tool-btn .icon{font-size:18px;line-height:1}.tool-sep{width:1px;margin:4px 2px;background:var(--border)}.selection-bar{top:84px}.hint{position:absolute;bottom:16px;left:16px;z-index:10;padding:8px 12px;font-size:12px;color:#6a737d;background:var(--panel);border:1px solid var(--border);border-radius:8px}.zoom-badge{position:absolute;bottom:16px;right:16px;z-index:10;padding:6px 10px;font-size:12px;font-variant-numeric:tabular-nums;color:#6a737d;background:var(--panel);border:1px solid var(--border);border-radius:8px}.auth-page{display:flex;align-items:center;justify-content:center;height:100vh;width:100vw}.auth-card{display:flex;flex-direction:column;gap:12px;width:320px;padding:28px;background:var(--panel);border:1px solid var(--border);border-radius:14px;box-shadow:0 10px 40px #0000001a}.auth-card h1{margin:0;font-size:22px}.auth-card label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:#555}.auth-card input,.share-form input,.share-form select{padding:9px 10px;border:1px solid var(--border);border-radius:8px;font-size:14px}.auth-error{padding:8px 10px;border-radius:8px;background:#fdeaea;border:1px solid #f3c2c2;color:#a23b3b;font-size:13px}.role-badge{margin-left:6px;padding:1px 7px;border-radius:999px;background:var(--accent-weak);color:var(--accent);font-size:11px;font-weight:600;text-transform:capitalize}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:flex;align-items:center;justify-content:center;background:#00000059}.modal{width:420px;max-width:calc(100vw - 32px);background:var(--panel);border-radius:14px;padding:20px;box-shadow:0 16px 50px #0003}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.modal-header h2{margin:0;font-size:18px}.share-form{display:flex;gap:8px;margin-bottom:14px}.share-form input{flex:1;min-width:0}.share-list{display:flex;flex-direction:column;gap:6px}.share-row{display:flex;align-items:center;gap:8px;padding:6px 8px;border:1px solid var(--border);border-radius:8px}.share-email{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.share-section-label{margin:14px 0 6px;font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.4px;color:#6a737d}.share-notice{padding:8px 10px;border-radius:8px;background:#e9f7ef;border:1px solid #bfe3cd;color:#246b45;font-size:13px;margin-bottom:10px}.board-list-header-right{display:flex;align-items:center;gap:12px}.board-list{height:100vh;width:100vw;overflow:auto;padding:32px 40px}.board-list-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.board-list-header h1{margin:0;font-size:24px}.primary-btn{padding:10px 16px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer}.primary-btn:hover{filter:brightness(.95)}.board-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}.board-card{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:0 0 12px;cursor:pointer;overflow:hidden;transition:box-shadow .12s ease,transform .12s ease}.board-card:hover{box-shadow:0 8px 28px #0000001a;transform:translateY(-2px)}.board-card-thumb{height:120px;background:linear-gradient(135deg,#eef1f6,#e1e7f0);border-bottom:1px solid var(--border)}.board-card-title{margin:12px 14px 2px;font-size:15px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.board-card-meta{margin:0 14px;font-size:12px;color:#6a737d}.board-card-actions{position:absolute;top:8px;right:8px;display:flex;gap:4px;opacity:0;transition:opacity .12s ease}.board-card:hover .board-card-actions{opacity:1}.board-card-actions button{width:28px;height:28px;border:1px solid var(--border);border-radius:6px;background:var(--panel);cursor:pointer;font-size:13px}.board-empty{margin-top:80px;text-align:center;color:#6a737d}.board-empty .primary-btn{margin-top:12px}.board-list-error{margin-bottom:20px;padding:14px 16px;border:1px solid #f3c2c2;background:#fdeaea;border-radius:8px;color:#a23b3b}.board-list-error button{margin-left:8px}.muted{color:#6a737d;font-size:13px}.board-loading{display:flex;align-items:center;justify-content:center;height:100vh;width:100vw;color:#6a737d;font-size:14px}.board-topbar{position:absolute;top:16px;left:16px;z-index:10;display:flex;align-items:center;gap:12px;padding:8px 12px;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:0 6px 24px #00000014}.back-link{color:var(--accent);text-decoration:none;font-size:13px;font-weight:600}.board-title{font-size:14px;font-weight:600;max-width:220px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.presence{position:absolute;top:16px;right:16px;z-index:10;display:flex;align-items:center;gap:10px;padding:6px 10px;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:0 6px 24px #00000014}.status-dot{width:9px;height:9px;border-radius:50%;background:#c2c8d0}.status-connected{background:#2ecc71}.status-connecting{background:#f1c40f}.status-disconnected{background:#e74c3c}.avatars{display:flex}.avatar{display:flex;align-items:center;justify-content:center;width:28px;height:28px;margin-left:-6px;border-radius:50%;border:2px solid var(--panel);color:#fff;font-size:11px;font-weight:600;letter-spacing:.3px}.avatar:first-child{margin-left:0}.marquee{position:absolute;z-index:14;pointer-events:none;border:1px solid var(--accent);background:#4262ff1a;border-radius:2px}.sel-count{display:flex;align-items:center;padding:0 8px;font-size:12px;color:#6a737d;white-space:nowrap}.remote-cursor{position:absolute;z-index:15;pointer-events:none;transform:translate(-2px,-2px);transition:left .05s linear,top .05s linear}.remote-cursor-label{position:absolute;left:16px;top:14px;padding:2px 6px;border-radius:6px;color:#fff;font-size:11px;font-weight:600;white-space:nowrap}.sticky-editor{position:absolute;z-index:20;margin:0;padding:8px;border:none;outline:2px solid var(--accent);border-radius:4px;resize:none;overflow:hidden;font-family:inherit;line-height:1.25;background:transparent}