:root{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;--bg-app:#f8fafc;--bg-card:#fff;--bg-subtle:#f1f5f9;--border:#e2e8f0;--border-focus:#2563eb;--text-main:#0f172a;--text-muted:#64748b;--text-faint:#94a3b8;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#eff6ff;--primary-fg:#fff;--success:#16a34a;--success-light:#f0fdf4;--danger:#dc2626;--danger-light:#fef2f2;--warning:#d97706}[data-theme=dark]{--bg-app:#090d16;--bg-card:#0f172a;--bg-subtle:#1e293b;--border:#1e293b;--border-focus:#3b82f6;--text-main:#f8fafc;--text-muted:#94a3b8;--text-faint:#64748b;--primary:#3b82f6;--primary-hover:#60a5fa;--primary-light:#3b82f61f;--primary-fg:#fff;--success:#22c55e;--success-light:#22c55e1f;--danger:#ef4444;--danger-light:#ef44441f;--warning:#f59e0b}*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100dvh}body{font-family:var(--font-sans);color:var(--text-main);background-color:var(--bg-app);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;padding:0;transition:background-color .2s,color .2s;overflow:hidden auto}.app-shell{flex-direction:column;width:100%;min-height:100dvh;display:flex;position:relative}.app-header{z-index:20;justify-content:space-between;align-items:center;width:100%;max-width:860px;margin:0 auto;padding:1.25rem 1.5rem;display:flex}.brand{-webkit-user-select:none;user-select:none;align-items:center;gap:.5rem;display:flex}.brand-badge{background:var(--text-main);width:26px;height:26px;color:var(--bg-app);border-radius:7px;justify-content:center;align-items:center;display:flex}.brand-title{letter-spacing:-.02em;color:var(--text-main);font-size:.95rem;font-weight:700}.brand-version{font-family:var(--font-mono);color:var(--text-muted);background:var(--bg-subtle);border:1px solid var(--border);border-radius:6px;padding:1px 6px;font-size:.7rem;font-weight:500}.header-actions{align-items:center;gap:.4rem;display:flex}.action-btn{border:1px solid var(--border);background:var(--bg-card);height:32px;color:var(--text-muted);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:.35rem;padding:0 .65rem;font-size:.8125rem;font-weight:500;transition:all .15s;display:inline-flex}.action-btn:hover{background:var(--bg-subtle);color:var(--text-main);border-color:var(--text-muted)}.action-btn.icon-btn{width:32px;padding:0}.action-btn.disconnect-btn{color:var(--danger);background:var(--danger-light);border-color:#dc262640}.action-btn.disconnect-btn:hover{background:var(--danger);color:#fff;border-color:var(--danger)}.main-content{z-index:10;flex-direction:column;width:100%;max-width:440px;margin:auto;padding:1.5rem 1.25rem 3.5rem;display:flex}.status-row{justify-content:center;margin-bottom:1.5rem;display:flex}.status-pill{background:var(--bg-card);border:1px solid var(--border);color:var(--text-muted);border-radius:9999px;align-items:center;gap:.5rem;padding:.3rem .85rem;font-size:.8rem;font-weight:500;display:inline-flex}.status-dot{background-color:var(--text-faint);border-radius:50%;width:7px;height:7px;transition:all .2s}.status-pill.connected .status-dot{background-color:var(--success);box-shadow:0 0 0 3px #22c55e33}.status-pill.connected{color:var(--text-main);border-color:var(--success)}.status-pill.connecting .status-dot{background-color:var(--warning);box-shadow:0 0 0 3px #d9770633}.hero-section{text-align:center;margin-bottom:1.75rem}h1{letter-spacing:-.035em;color:var(--text-main);margin-bottom:.35rem;font-size:2.2rem;font-weight:700}p.subtitle{color:var(--text-muted);margin:0;font-size:.9375rem;line-height:1.45}.panel-card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:1.5rem;box-shadow:0 1px 3px #0000000a}.btn-primary{cursor:pointer;background:var(--primary);width:100%;color:var(--primary-fg);border:none;border-radius:11px;justify-content:center;align-items:center;gap:.45rem;padding:.85rem 1.25rem;font-family:inherit;font-size:.9375rem;font-weight:600;transition:background-color .15s,transform .1s;display:inline-flex}.btn-primary:hover{background:var(--primary-hover)}.btn-primary:active{transform:scale(.99)}.btn-primary.btn-sm{border-radius:9px;width:auto;padding:.55rem 1rem;font-size:.875rem}.btn-secondary{cursor:pointer;border:1px solid var(--border);background:var(--bg-subtle);height:44px;color:var(--text-main);white-space:nowrap;border-radius:10px;justify-content:center;align-items:center;gap:.4rem;padding:0 1.15rem;font-family:inherit;font-size:.875rem;font-weight:600;transition:all .15s;display:inline-flex}.btn-secondary:hover{border-color:var(--primary);color:var(--primary)}.divider-line{text-align:center;color:var(--text-faint);text-transform:uppercase;letter-spacing:1px;align-items:center;margin:1.25rem 0;font-size:.75rem;font-weight:600;display:flex}.divider-line:before,.divider-line:after{content:"";border-bottom:1px solid var(--border);flex:1}.divider-line span{padding:0 .75rem}.join-row{align-items:center;gap:.5rem;display:flex}.input-wrapper{flex:1;align-items:center;display:flex;position:relative}.room-input{background:var(--bg-subtle);border:1px solid var(--border);width:100%;height:44px;color:var(--text-main);font-family:var(--font-mono);letter-spacing:1.5px;text-align:center;border-radius:10px;padding:0 2.5rem 0 .85rem;font-size:.95rem;font-weight:600;transition:border-color .15s,box-shadow .15s}.room-input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--primary-light);outline:none}.scan-btn{width:32px;height:32px;color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:7px;justify-content:center;align-items:center;padding:0;transition:color .15s;display:flex;position:absolute;right:6px}.scan-btn:hover{color:var(--text-main)}.share-card{text-align:center}.share-instructions{color:var(--text-muted);margin-bottom:.75rem;font-size:.875rem}.room-code-display{background:var(--bg-subtle);border:1px solid var(--border);border-radius:12px;justify-content:center;align-items:center;gap:.75rem;margin-bottom:1.25rem;padding:.75rem 1.25rem;display:flex}.room-digits{font-family:var(--font-mono);letter-spacing:3px;color:var(--text-main);font-size:1.85rem;font-weight:700}.btn-copy{cursor:pointer;border:1px solid var(--border);background:var(--bg-card);height:32px;color:var(--text-main);border-radius:8px;align-items:center;gap:.35rem;padding:0 .65rem;font-family:inherit;font-size:.75rem;font-weight:600;transition:all .15s;display:inline-flex}.btn-copy:hover{border-color:var(--primary);color:var(--primary)}.icon-success{color:var(--success)}.qr-container{justify-content:center;display:flex}.qr-plate{border:1px solid var(--border);background:#fff;border-radius:14px;padding:.85rem;line-height:0;box-shadow:0 1px 4px #0000000a}.drop-zone{border:1.5px dashed var(--border);background:var(--bg-subtle);text-align:center;border-radius:14px;padding:2rem 1.25rem;transition:all .15s}.drop-zone.dragging{border-color:var(--primary);background:var(--primary-light)}.drop-actions{justify-content:center;align-items:center;gap:1rem;display:flex}.picker-btn{cursor:pointer;color:var(--text-muted);background:0 0;border:none;border-radius:8px;flex-direction:column;align-items:center;gap:.4rem;padding:.5rem;transition:all .15s;display:flex}.picker-btn:hover{color:var(--primary);transform:translateY(-1px)}.picker-icon{color:var(--primary)}.picker-label{font-size:.875rem;font-weight:600}.picker-divider{background:var(--border);width:1px;height:38px}.drop-subtext{color:var(--text-faint);margin-top:1rem;margin-bottom:0;font-size:.775rem}.transfer-box{background:var(--bg-subtle);border:1px solid var(--border);border-radius:12px;padding:1rem;transition:all .2s}.transfer-box.completed{border-color:var(--success);background:var(--success-light)}.transfer-header{justify-content:space-between;align-items:baseline;gap:.5rem;margin-bottom:.6rem;display:flex}.file-name{color:var(--text-main);text-overflow:ellipsis;white-space:nowrap;font-size:.875rem;font-weight:600;overflow:hidden}.file-meta{font-family:var(--font-mono);color:var(--text-muted);flex-shrink:0;font-size:.775rem}.progress-track{background:var(--border);border-radius:9999px;height:5px;overflow:hidden}.progress-fill{background:var(--primary);border-radius:9999px;height:100%;transition:width .15s ease-out,background-color .25s}.transfer-footer{justify-content:space-between;align-items:center;margin-top:.5rem;display:flex}.transfer-status{color:var(--text-muted);align-items:center;gap:.35rem;font-size:.8rem;font-weight:500;display:inline-flex}.transfer-status.completed{color:var(--success);font-weight:600}.transfer-percent{font-family:var(--font-mono);color:var(--text-muted);font-size:.8rem;font-weight:600}.selected-box{background:var(--bg-subtle);border:1px solid var(--border);border-radius:12px;justify-content:space-between;align-items:center;gap:.75rem;padding:.85rem 1rem;display:flex}.selected-info{align-items:center;gap:.75rem;display:flex;overflow:hidden}.selected-icon{background:var(--primary-light);width:34px;height:34px;color:var(--primary);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.selected-details{overflow:hidden}.selected-name{color:var(--text-main);text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:.875rem;font-weight:600;overflow:hidden}.selected-meta{font-family:var(--font-mono);color:var(--text-muted);margin:0;font-size:.75rem}.selected-actions{flex-shrink:0;align-items:center;gap:.4rem;display:flex}.btn-cancel{border:1px solid var(--border);background:var(--bg-card);width:32px;height:32px;color:var(--text-faint);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;padding:0;transition:all .15s;display:flex}.btn-cancel:hover{color:var(--danger);border-color:var(--danger)}.qr-scanner-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;background:#000000a6;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.qr-scanner-container{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;width:100%;max-width:360px;padding:1.5rem 1rem 1rem;position:relative;box-shadow:0 20px 25px -5px #00000040}.qr-close-btn{color:var(--text-muted);cursor:pointer;z-index:10;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;padding:0;transition:color .15s;display:flex;position:absolute;top:.75rem;right:.75rem}.qr-close-btn:hover{color:var(--text-main)}.qr-error{text-align:center;color:var(--danger);padding:2rem 1rem;font-size:.875rem;font-weight:500}.qr-reader-box{border-radius:12px;width:100%;overflow:hidden}.qr-reader-box video{border-radius:12px}