:root{--primary: #4f46e5;--primary-hover: #4338ca;--bg-color: #0f172a;--card-bg: #1e293b;--text-main: #f8fafc;--text-muted: #94a3b8;--danger: #ef4444;--success: #22c55e;--radius: 12px;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);line-height:1.5;min-height:100vh;display:flex;flex-direction:column}button{cursor:pointer;border:none;font-family:inherit}.container{max-width:600px;margin:0 auto;padding:2rem 1rem;width:100%}.card{background-color:var(--card-bg);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center}.card-title{margin-bottom:2rem;font-size:1.25rem}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.mode-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;background-color:#ffffff0d;border-radius:var(--radius);color:var(--text-main);transition:all .2s ease;border:2px solid transparent}.mode-btn:hover{background-color:#ffffff1a;transform:translateY(-2px)}.mode-btn.send:hover{border-color:var(--primary)}.mode-btn.receive:hover{border-color:var(--success)}.icon{font-size:3rem;margin-bottom:1rem}.animate-fade{animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:480px){.mode-grid{grid-template-columns:1fr}}.input-group{margin:1.5rem 0;text-align:left}.input-label{display:block;margin-bottom:.5rem;color:var(--text-muted);font-size:.9rem}.code-input{width:100%;padding:1rem;font-size:1.5rem;letter-spacing:2px;text-align:center;background-color:#0003;border:1px solid #334155;border-radius:var(--radius);color:var(--text-main);outline:none;font-family:monospace}.code-input:focus{border-color:var(--primary)}.status-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:20px;font-size:.9rem;font-weight:600;margin-bottom:1rem;background-color:#ffffff0d}.status-badge.connected{background-color:#22c55e1a;color:var(--success)}.status-badge.waiting{background-color:#eab3081a;color:#fbbf24}.id-display{background:#0f172a;padding:1rem;border-radius:var(--radius);font-family:monospace;font-size:1.5rem;letter-spacing:1px;margin:1rem 0;border:2px dashed #334155;-webkit-user-select:all;user-select:all;cursor:pointer}.action-btn{width:100%;padding:1rem;background-color:var(--primary);color:#fff;border-radius:var(--radius);font-weight:700;font-size:1rem;margin-top:1rem}.action-btn:disabled{background-color:#334155;cursor:not-allowed;opacity:.7}.file-list{display:flex;flex-direction:column;gap:.75rem;margin:1.5rem 0;max-height:300px;overflow-y:auto}.file-item{display:flex;align-items:center;justify-content:space-between;background-color:#ffffff08;padding:1rem;border-radius:8px;border:1px solid rgba(255,255,255,.1)}.file-info{display:flex;flex-direction:column;text-align:left;overflow:hidden}.file-name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}.file-size{font-size:.8rem;color:var(--text-muted)}.download-btn{background-color:var(--success);color:#fff;padding:.5rem 1rem;border-radius:6px;font-size:.8rem;text-decoration:none;font-weight:700}.download-btn:hover{opacity:.9}.hidden-input{display:none}.upload-label{display:inline-block;padding:1rem 2rem;background-color:#334155;border:2px dashed #64748b;border-radius:var(--radius);cursor:pointer;width:100%;margin-top:1rem;transition:all .2s}.upload-label:hover{border-color:var(--primary);background-color:#4f46e51a}.transfer-status{background:#0003;padding:1.5rem;border-radius:var(--radius);margin-top:1.5rem;border:1px solid rgba(255,255,255,.1)}.progress-track{width:100%;height:10px;background:#ffffff1a;border-radius:5px;overflow:hidden;margin:10px 0}.progress-fill{height:100%;background:var(--primary);width:0%;transition:width .2s linear}.stats-row{display:flex;justify-content:space-between;font-size:.9rem;color:var(--text-muted);margin-top:5px}.speed-indicator{color:var(--success);font-family:monospace}.btn-row{display:flex;gap:10px;margin-top:1rem}.secondary-btn{background-color:transparent;border:1px solid rgba(255,255,255,.2);color:var(--text-muted);padding:.5rem 1rem;border-radius:8px;font-size:.9rem;cursor:pointer;transition:all .2s}.secondary-btn:hover{border-color:var(--text-main);color:var(--text-main);background-color:#ffffff0d}.secondary-btn.danger:hover{border-color:var(--danger);color:var(--danger)}.upload-area{border:2px dashed #334155;background-color:#ffffff05;border-radius:var(--radius);padding:3rem;text-align:center;transition:all .2s ease;cursor:pointer;position:relative}.upload-area:hover,.upload-area.dragging{border-color:var(--primary);background-color:#4f46e51a}.upload-icon{font-size:3rem;margin-bottom:1rem;display:block;color:var(--text-muted)}.file-item{align-items:center}.file-preview{width:40px;height:40px;border-radius:6px;object-fit:cover;margin-right:12px;background:#334155;flex-shrink:0}.qr-container{background:#fff;padding:10px;border-radius:12px;display:inline-block;margin:1rem 0}.tabs{display:flex;background:#0003;padding:4px;border-radius:12px;margin-bottom:1.5rem}.tab-btn{flex:1;padding:10px;border-radius:8px;color:var(--text-muted);font-weight:600;transition:all .2s;background:transparent}.tab-btn.active{background:var(--card-bg);color:var(--primary);box-shadow:0 2px 4px #0000001a}.text-area{width:100%;height:150px;background:#0003;border:1px solid #334155;border-radius:var(--radius);padding:1rem;color:#fff;font-family:inherit;resize:none;margin-bottom:1rem}.text-area:focus{outline:none;border-color:var(--primary)}.text-card{background:#ffffff0d;border-left:4px solid var(--primary);padding:1rem;border-radius:8px;margin-bottom:.75rem;text-align:left;position:relative;word-break:break-word}.copy-btn{position:absolute;top:10px;right:10px;background:#0000004d;padding:4px 8px;border-radius:4px;font-size:.7rem;color:#fff}.copy-btn:hover{background:var(--primary)}.timestamp{display:block;font-size:.7rem;color:var(--text-muted);margin-top:8px}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:2000;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.modal-content{background:var(--card-bg);padding:2rem;border-radius:var(--radius);width:90%;max-width:400px;border:1px solid rgba(255,255,255,.1)}.avatar-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:10px}.avatar-btn{font-size:1.5rem;padding:10px;background:#ffffff0d;border-radius:8px;transition:all .2s}.avatar-btn:hover{background:#ffffff1a}.avatar-btn.selected{background:var(--primary);border:2px solid white}.toast-container{position:fixed;top:20px;left:50%;transform:translate(-50%);z-index:1000;display:flex;flex-direction:column;gap:10px;pointer-events:none}.toast{background:var(--card-bg);color:var(--text-main);padding:12px 24px;border-radius:50px;box-shadow:0 10px 15px -3px #0000004d;display:flex;align-items:center;gap:10px;min-width:300px;justify-content:center;animation:slideDown .3s cubic-bezier(.175,.885,.32,1.275);border:1px solid rgba(255,255,255,.1);pointer-events:auto}.toast.success{border-color:var(--success)}.toast.error{border-color:var(--danger)}.toast.info{border-color:var(--primary)}@keyframes slideDown{0%{transform:translateY(-50px);opacity:0}to{transform:translateY(0);opacity:1}}