:root{--primary: #4f46e5;--primary-hover: #4338ca;--bg: #f3f4f6;--card-bg: #ffffff;--text-main: #1f2937;--text-light: #6b7280;--success: #22c55e;--warning: #f97316}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg);color:var(--text-main);min-height:100vh;display:flex;flex-direction:column}.center-screen{display:flex;justify-content:center;align-items:center;flex:1;padding:20px}.card{background:var(--card-bg);padding:2.5rem;border-radius:16px;box-shadow:0 10px 25px -5px #0000001a,0 8px 10px -6px #0000001a;width:100%;max-width:480px;text-align:center;transition:transform .2s ease}h1{margin:0;font-size:2rem;color:var(--primary);letter-spacing:-.025em}h2{font-size:1.5rem;margin-bottom:.5rem;color:var(--text-main)}.subtitle{color:var(--text-light);margin-bottom:2rem;font-size:.95rem}.highlight{color:var(--primary);font-family:Monaco,Consolas,monospace;background:#eef2ff;padding:2px 6px;border-radius:4px}button{width:100%;padding:12px;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s;font-size:1rem;display:inline-flex;justify-content:center;align-items:center}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 6px -1px #4f46e533}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:#e5e7eb;color:var(--text-main)}.btn-secondary:hover{background:#d1d5db}input{width:100%;padding:12px;border:1px solid #d1d5db;border-radius:8px;font-size:1rem;outline:none;transition:border-color .2s;box-sizing:border-box}input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.divider{display:flex;align-items:center;color:var(--text-light);margin:1.5rem 0;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}.divider:before,.divider:after{content:"";flex:1;border-bottom:1px solid #e5e7eb}.divider span{padding:0 10px}.join-group{display:flex;gap:10px}.join-group input{flex:2}.join-group button{flex:1}.status-badge{display:inline-block;padding:6px 16px;border-radius:20px;font-size:.85rem;font-weight:600;margin-bottom:25px;margin-top:5px}.status-badge.orange{background:#fff7ed;color:var(--warning)}.status-badge.green{background:#f0fdf4;color:var(--success)}.connect-area{display:flex;flex-direction:column;align-items:center;gap:15px}.qr-wrapper{padding:15px;background:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 4px 6px -1px #0000000d}.connect-area p{color:var(--text-light);font-size:.9rem;margin:0}.transfer-area{margin-top:10px;animation:fadeIn .5s ease}.drop-zone{border:2px dashed #cbd5e1;border-radius:12px;padding:40px 20px;text-align:center;background-color:#f8fafc;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.drop-zone:hover{border-color:var(--primary);background-color:#eef2ff}.drop-zone.dragging{border-color:var(--primary);background-color:#e0e7ff;transform:scale(1.02);box-shadow:0 10px 15px -3px #4f46e51a}.drop-zone .icon{font-size:48px;margin-bottom:12px;filter:grayscale(100%);transition:filter .3s}.drop-zone:hover .icon,.drop-zone.dragging .icon{filter:grayscale(0%);animation:bounce 1s infinite}.drop-zone p{font-size:1.1rem;font-weight:600;color:var(--text-main);margin:5px 0}.drop-zone span{font-size:.9rem;color:var(--text-light)}.progress-section{margin-top:20px;text-align:left;padding:20px;background:#f8fafc;border-radius:12px;border:1px solid #e2e8f0}.progress-section p{margin:0 0 10px;font-weight:500;font-size:.95rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.progress-track{height:8px;background:#e2e8f0;border-radius:4px;overflow:hidden;margin-bottom:8px}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary) 0%,#6366f1 100%);transition:width .3s ease}.speed-text{font-size:.85rem;color:var(--text-light);text-align:right;margin:0!important;font-family:monospace}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}@media(max-width:480px){.card{padding:1.5rem;box-shadow:none;background:transparent}.drop-zone{padding:30px 15px}}