:root{--primary: #6366f1;--primary-dark: #4f46e5;--bg: #f8fafc;--bg-dark: #1e293b;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--success: #22c55e;--danger: #ef4444;--card-shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app-container{min-height:100vh;display:flex;flex-direction:column}.app-header{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;padding:3rem 2rem;text-align:center}.app-header h1{font-size:2.5rem;margin-bottom:.5rem}.app-header p{opacity:.9;font-size:1.1rem}.app-main{flex:1;max-width:1200px;margin:0 auto;padding:2rem;width:100%}.app-footer{text-align:center;padding:1.5rem;color:var(--text-muted);font-size:.875rem;border-top:1px solid var(--border)}.new-board-form{display:flex;gap:.75rem;margin-bottom:1.5rem}.new-board-form input{flex:1;padding:.75rem 1rem;border:2px solid var(--border);border-radius:8px;font-size:1rem;transition:border-color .2s}.new-board-form input:focus{outline:none;border-color:var(--primary)}.new-board-form button{padding:.75rem 1.5rem;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s;white-space:nowrap}.new-board-form button:hover{background:var(--primary-dark)}.quick-join{display:flex;align-items:center;gap:.75rem;margin-bottom:2rem;padding:1rem;background:#fff;border-radius:8px;border:1px solid var(--border)}.quick-join span{color:var(--text-muted);font-size:.875rem}.quick-join input{flex:1;padding:.5rem .75rem;border:1px solid var(--border);border-radius:6px;font-size:.875rem}.quick-join input:focus{outline:none;border-color:var(--primary)}.boards-section h2{font-size:1.25rem;margin-bottom:1rem;color:var(--text)}.boards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}.board-card{background:#fff;border-radius:12px;border:1px solid var(--border);overflow:hidden;cursor:pointer;transition:transform .2s,box-shadow .2s;position:relative}.board-card:hover{transform:translateY(-2px);box-shadow:var(--card-shadow)}.board-preview{height:120px;background:linear-gradient(135deg,#f1f5f9,#e2e8f0);display:flex;align-items:center;justify-content:center}.board-icon{font-size:2.5rem;opacity:.5}.board-info{padding:1rem}.board-info h3{font-size:1rem;font-weight:600;margin-bottom:.25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.board-date{font-size:.75rem;color:var(--text-muted)}.delete-btn{position:absolute;top:.5rem;right:.5rem;width:32px;height:32px;border:none;background:#ffffffe6;border-radius:6px;cursor:pointer;opacity:0;transition:opacity .2s;font-size:1rem}.board-card:hover .delete-btn{opacity:1}.delete-btn:hover{background:#fee2e2}.empty-state,.loading{text-align:center;padding:3rem;color:var(--text-muted)}.empty-state p{margin-bottom:.5rem}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;padding:2rem;border-radius:16px;width:90%;max-width:400px;text-align:center}.modal h2{margin-bottom:.5rem}.modal .board-name{color:var(--text-muted);margin-bottom:1.5rem}.modal form{display:flex;flex-direction:column;gap:1rem}.modal input{padding:.875rem 1rem;border:2px solid var(--border);border-radius:8px;font-size:1rem;text-align:center}.modal input:focus{outline:none;border-color:var(--primary)}.modal button[type=submit]{padding:.875rem;background:var(--primary);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer}.modal button[type=submit]:hover{background:var(--primary-dark)}.modal .back-btn{margin-top:1rem;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.875rem}.modal .back-btn:hover{color:var(--text)}.board-container{height:100vh;display:flex;flex-direction:column}.board-header{display:flex;align-items:center;gap:1rem;padding:.75rem 1rem;background:#fff;border-bottom:1px solid var(--border);z-index:100}.home-btn{padding:.5rem 1rem;background:none;border:1px solid var(--border);border-radius:6px;cursor:pointer;font-size:.875rem;color:var(--text);transition:background .2s}.home-btn:hover{background:var(--bg)}.board-title{font-weight:600;flex:1}.presence{display:flex;align-items:center;gap:.75rem}.status-dot{width:8px;height:8px;border-radius:50%;background:var(--danger)}.status-dot.online{background:var(--success)}.user-count{font-size:.875rem;color:var(--text-muted)}.user-avatars{display:flex;margin-left:.5rem}.user-avatar{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:600;color:#fff;margin-left:-8px;border:2px solid white}.user-avatar:first-child{margin-left:0}.user-avatar.more{background:var(--text-muted);font-size:.65rem}.excalidraw-wrapper{flex:1;position:relative;overflow:hidden}.excalidraw-wrapper .excalidraw{height:100%}.loading-board{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;color:var(--text-muted)}.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.cursors-overlay{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.remote-cursor{position:absolute;transform:translate(-2px,-2px);transition:left .05s linear,top .05s linear;z-index:1000}.remote-cursor svg{width:20px;height:20px;filter:drop-shadow(0 1px 2px rgba(0,0,0,.2))}.cursor-label{position:absolute;left:16px;top:16px;padding:2px 6px;border-radius:4px;font-size:11px;font-weight:500;color:#fff;white-space:nowrap}@media (max-width: 640px){.app-header{padding:2rem 1rem}.app-header h1{font-size:1.75rem}.app-main{padding:1rem}.new-board-form{flex-direction:column}.quick-join{flex-direction:column;align-items:stretch}.board-header{flex-wrap:wrap}.board-title{order:-1;width:100%;text-align:center;padding-bottom:.5rem}}