:root,:root[data-theme=light]{--color-bg: #ffffff;--color-bg-elevated: #f8fafc;--color-bg-subtle: #f1f5f9;--color-surface: #ffffff;--color-surface-hover: #f8fafc;--color-border: #e2e8f0;--color-border-strong: #cbd5e1;--color-text: #0f172a;--color-text-muted: #475569;--color-text-subtle: #94a3b8;--color-primary: #22c55e;--color-primary-hover: #16a34a;--color-primary-active: #15803d;--color-primary-soft: rgba(34, 197, 94, .12);--color-primary-contrast: #ffffff;--color-secondary: #64748b;--color-secondary-hover: #475569;--color-danger: #ef4444;--color-danger-soft: rgba(239, 68, 68, .12);--color-warning: #f59e0b;--color-warning-soft: rgba(245, 158, 11, .12);--color-warning-text: #92400e;--color-success: #22c55e;--color-success-soft: rgba(34, 197, 94, .12);--color-info: #3b82f6;--color-info-soft: rgba(59, 130, 246, .12);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .08);--shadow-md: 0 4px 12px rgba(15, 23, 42, .08), 0 2px 4px rgba(15, 23, 42, .06);--shadow-lg: 0 10px 32px rgba(15, 23, 42, .12), 0 4px 8px rgba(15, 23, 42, .08);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif, system-ui;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--header-height: 56px;--max-content-width: 640px;--transition: .18s cubic-bezier(.4, 0, .2, 1)}:root[data-theme=dark]{--color-bg: #0a0a0f;--color-bg-elevated: #131320;--color-bg-subtle: #1a1a2a;--color-surface: #14141f;--color-surface-hover: #1c1c2e;--color-border: #2a2a3e;--color-border-strong: #3a3a52;--color-text: #f1f5f9;--color-text-muted: #94a3b8;--color-text-subtle: #64748b;--color-primary: #22c55e;--color-primary-hover: #4ade80;--color-primary-active: #16a34a;--color-primary-soft: rgba(34, 197, 94, .16);--color-primary-contrast: #0a0a0f;--color-secondary: #94a3b8;--color-secondary-hover: #cbd5e1;--color-danger: #f87171;--color-danger-soft: rgba(248, 113, 113, .16);--color-warning: #fbbf24;--color-warning-soft: rgba(251, 191, 36, .16);--color-warning-text: #fcd34d;--color-success: #4ade80;--color-success-soft: rgba(74, 222, 128, .16);--color-info: #60a5fa;--color-info-soft: rgba(96, 165, 250, .16);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .5), 0 2px 4px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 32px rgba(0, 0, 0, .6), 0 4px 8px rgba(0, 0, 0, .5)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.5;font-size:16px;min-height:100vh;min-height:100dvh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition),color var(--transition)}#app{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.25;color:var(--color-text)}h1{font-size:1.75rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1rem}p{color:var(--color-text-muted)}button{font-family:inherit;font-size:inherit;border:none;background:none;cursor:pointer;color:inherit}input,textarea{font-family:inherit;font-size:inherit}svg{display:block}a{color:inherit;text-decoration:none}::selection{background:var(--color-primary-soft);color:var(--color-text)}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-header{position:sticky;top:0;z-index:100;display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);height:var(--header-height);padding:0 var(--space-4);background:color-mix(in srgb,var(--color-bg) 85%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border)}.header-left{display:flex;align-items:center;gap:var(--space-4);min-width:0}.logo{display:inline-flex;align-items:center;gap:var(--space-2);font-weight:700;font-size:1.05rem;color:var(--color-text);white-space:nowrap}.logo svg{width:22px;height:22px;color:var(--color-primary);flex-shrink:0}.tabs{display:inline-flex;gap:var(--space-1);background:var(--color-bg-subtle);padding:4px;border-radius:var(--radius-full);border:1px solid var(--color-border)}.tabs button{appearance:none;padding:var(--space-2) var(--space-4);border-radius:var(--radius-full);font-size:.875rem;font-weight:500;color:var(--color-text-muted);transition:background var(--transition),color var(--transition);min-height:32px}.tabs button[aria-selected=true]{background:var(--color-surface);color:var(--color-text);box-shadow:var(--shadow-sm)}.tabs button:not([aria-selected=true]):hover{color:var(--color-text)}.header-right{display:flex;align-items:center;flex-shrink:0}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-full);background:var(--color-bg-subtle);border:1px solid var(--color-border);color:var(--color-text-muted);min-width:44px;min-height:44px;transition:background var(--transition),color var(--transition),transform var(--transition)}.theme-toggle:hover{background:var(--color-surface-hover);color:var(--color-text)}.theme-toggle:active{transform:scale(.94)}.theme-toggle svg{width:20px;height:20px}.app-main{flex:1;width:100%;max-width:var(--max-content-width);margin:0 auto;padding:var(--space-4);padding-block:var(--space-6)}.page{display:flex;flex-direction:column;gap:var(--space-6);animation:page-in .24s ease-out}@keyframes page-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.page-header{text-align:center;padding-block:var(--space-2) var(--space-4)}.page-header h1{margin-bottom:var(--space-2);background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-hover) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}.page-subtitle{color:var(--color-text-muted);font-size:.95rem;max-width:36ch;margin-inline:auto}.page-content{display:flex;flex-direction:column;gap:var(--space-6)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);font-weight:600;font-size:.95rem;min-height:44px;border:1px solid transparent;transition:background var(--transition),color var(--transition),border-color var(--transition),transform var(--transition),box-shadow var(--transition);white-space:nowrap;user-select:none}.btn:active{transform:translateY(1px)}.btn:disabled,.btn[disabled]{opacity:.55;cursor:not-allowed}.btn svg{width:18px;height:18px;flex-shrink:0}.btn-primary{background:var(--color-primary);color:var(--color-primary-contrast);box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);box-shadow:var(--shadow-md)}.btn-primary:active:not(:disabled){background:var(--color-primary-active)}.btn-secondary{background:var(--color-surface);color:var(--color-text);border-color:var(--color-border-strong)}.btn-secondary:hover:not(:disabled){background:var(--color-surface-hover);border-color:var(--color-secondary)}.btn-ghost{background:transparent;color:var(--color-text-muted)}.btn-ghost:hover:not(:disabled){background:var(--color-bg-subtle);color:var(--color-text)}.file-drop-zone{display:flex;flex-direction:column;gap:var(--space-4)}.drop-area{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-3);padding:var(--space-12) var(--space-6);background:var(--color-surface);border:2px dashed var(--color-border-strong);border-radius:var(--radius-lg);cursor:pointer;text-align:center;transition:border-color var(--transition),background var(--transition),transform var(--transition);min-height:200px}.drop-area:hover,.drop-area:focus-visible{border-color:var(--color-primary);background:var(--color-primary-soft);outline:none}.drop-area.drag-over{border-color:var(--color-primary);background:var(--color-primary-soft);transform:scale(1.01)}.drop-icon{width:48px;height:48px;color:var(--color-primary);flex-shrink:0}.drop-text{font-weight:600;font-size:1rem;color:var(--color-text)}.drop-hint{font-size:.85rem;color:var(--color-text-subtle)}.file-list{display:flex;flex-direction:column;gap:var(--space-2)}.file-item{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);animation:file-in .2s ease-out}@keyframes file-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.file-info{display:flex;align-items:center;gap:var(--space-3);min-width:0;flex:1}.file-icon{width:28px;height:28px;color:var(--color-secondary);flex-shrink:0}.file-details{display:flex;flex-direction:column;gap:2px;min-width:0}.file-name{font-size:.9rem;font-weight:500;color:var(--color-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.file-size{font-size:.78rem;color:var(--color-text-subtle);font-variant-numeric:tabular-nums}.file-remove{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-full);font-size:1.4rem;line-height:1;color:var(--color-text-subtle);transition:background var(--transition),color var(--transition);flex-shrink:0}.file-remove:hover{background:var(--color-danger-soft);color:var(--color-danger)}.magnet-display-container,.progress-container,.peer-stats-container{display:flex;flex-direction:column;gap:var(--space-4)}.magnet-display{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-5);display:flex;flex-direction:column;gap:var(--space-4);box-shadow:var(--shadow-sm)}.magnet-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);flex-wrap:wrap}.magnet-header h3{font-size:1rem}.magnet-actions{display:flex;gap:var(--space-2)}.magnet-link-container{display:flex}.magnet-link{width:100%;resize:none;font-family:var(--font-mono);font-size:.78rem;line-height:1.5;padding:var(--space-3) var(--space-4);background:var(--color-bg-subtle);color:var(--color-text-muted);border:1px solid var(--color-border);border-radius:var(--radius-md);min-height:90px;max-height:180px;word-break:break-all;overflow-y:auto}.magnet-link:focus{outline:2px solid var(--color-primary);outline-offset:-1px}.qr-section{display:flex;flex-direction:column;align-items:center;gap:var(--space-2);padding:var(--space-4);background:var(--color-bg-subtle);border-radius:var(--radius-md)}.qr-section h4{font-size:.85rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}.qr-code-wrapper{padding:var(--space-3);background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);line-height:0}.qr-code{display:block;width:256px;height:256px;max-width:100%;height:auto;aspect-ratio:1 / 1;image-rendering:pixelated}.qr-hint{font-size:.78rem;color:var(--color-text-subtle);text-align:center}.file-summary{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-bg-subtle);border-radius:var(--radius-md)}.file-summary svg{width:24px;height:24px;color:var(--color-primary);flex-shrink:0}.file-summary-info{display:flex;flex-direction:column;gap:2px;min-width:0}.file-summary-name{font-weight:500;font-size:.9rem;color:var(--color-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-summary-size{font-size:.78rem;color:var(--color-text-subtle)}.warning-banner{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-warning-soft);border:1px solid color-mix(in srgb,var(--color-warning) 35%,transparent);border-radius:var(--radius-md);color:var(--color-warning-text);font-size:.85rem;line-height:1.5}.warning-banner svg{width:20px;height:20px;color:var(--color-warning);flex-shrink:0;margin-top:1px}.transfer-progress{padding:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);display:flex;flex-direction:column;gap:var(--space-3)}.progress-header{display:flex;align-items:center;justify-content:space-between;font-size:.9rem;font-weight:500}.progress-label{color:var(--color-text-muted)}.progress-percent{color:var(--color-text);font-weight:600;font-variant-numeric:tabular-nums}.progress-bar{position:relative;width:100%;height:10px;background:var(--color-bg-subtle);border-radius:var(--radius-full);overflow:hidden;border:1px solid var(--color-border)}.progress-fill{position:absolute;inset:0 auto 0 0;background:linear-gradient(90deg,var(--color-primary) 0%,var(--color-primary-hover) 100%);border-radius:var(--radius-full);transition:width .4s cubic-bezier(.4,0,.2,1);min-width:0}.progress-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-3);margin-top:var(--space-1)}.progress-stats .stat{display:flex;flex-direction:column;gap:2px}.stat-label{font-size:.72rem;color:var(--color-text-subtle);text-transform:uppercase;letter-spacing:.04em}.stat-value{font-size:.95rem;font-weight:600;color:var(--color-text);font-variant-numeric:tabular-nums}.peer-stats{padding:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);display:flex;flex-direction:column;gap:var(--space-3)}.peer-stats h4{font-size:.85rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-3)}.stat-card{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-3);background:var(--color-bg-subtle);border-radius:var(--radius-md);min-width:0}.stat-card .stat-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-md);background:var(--color-primary-soft);color:var(--color-primary);flex-shrink:0}.stat-card .stat-icon svg{width:18px;height:18px}.stat-card .stat-info{display:flex;flex-direction:column;gap:2px;min-width:0}.stat-card .stat-value{font-size:.92rem;font-weight:700;color:var(--color-text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.stat-card .stat-label{font-size:.68rem;letter-spacing:.02em}.receiver-container{display:flex;flex-direction:column}.receiver-view>div{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);display:flex;flex-direction:column;align-items:center;text-align:center;gap:var(--space-4);box-shadow:var(--shadow-sm);animation:receiver-in .22s ease-out}@keyframes receiver-in{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.receiver-complete .complete-icon,.receiver-error .error-icon,.receiver-waiting .waiting-icon{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:var(--radius-full)}.receiver-complete .complete-icon{background:var(--color-success-soft);color:var(--color-success)}.receiver-error .error-icon{background:var(--color-danger-soft);color:var(--color-danger)}.receiver-waiting .waiting-icon{background:var(--color-info-soft);color:var(--color-info);animation:pulse 1.6s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(.92)}}.receiver-complete .complete-icon svg,.receiver-error .error-icon svg,.receiver-waiting .waiting-icon svg{width:32px;height:32px}.receiver-view h3{font-size:1.15rem}.receiver-view .file-info{display:flex;flex-direction:column;gap:2px;align-items:center}.receiver-view .file-name{font-weight:600;font-size:1rem;color:var(--color-text);max-width:260px}.receiver-view .file-size{font-size:.85rem;color:var(--color-text-subtle);font-variant-numeric:tabular-nums}.complete-actions{display:flex;gap:var(--space-3);flex-wrap:wrap;justify-content:center}.receiver-downloading{width:100%;align-items:stretch!important;text-align:left!important}.file-header{display:flex;align-items:center;gap:var(--space-3);padding-bottom:var(--space-3);border-bottom:1px solid var(--color-border)}.file-header .file-icon{width:36px;height:36px;color:var(--color-primary);flex-shrink:0}.progress-section{display:flex;flex-direction:column;gap:var(--space-3);margin-block:var(--space-2) var(--space-3)}.streaming-notice{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:var(--color-info-soft);border-radius:var(--radius-md);color:var(--color-info);font-size:.82rem;text-align:left}.streaming-notice svg{width:18px;height:18px;flex-shrink:0}.receiver-error p{color:var(--color-text-muted);max-width:32ch}.receive-input{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-5);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.input-group{display:flex;gap:var(--space-2);align-items:stretch}.magnet-input{flex:1;min-width:0;padding:var(--space-3) var(--space-4);background:var(--color-bg-subtle);border:1px solid var(--color-border-strong);border-radius:var(--radius-md);font-family:var(--font-mono);font-size:.85rem;color:var(--color-text);min-height:44px}.magnet-input:focus{outline:2px solid var(--color-primary);outline-offset:-1px;background:var(--color-surface)}.input-hint{font-size:.8rem;color:var(--color-text-subtle);text-align:center}.toast-container{position:fixed;top:calc(var(--header-height) + var(--space-3));right:var(--space-4);left:var(--space-4);z-index:1000;display:flex;flex-direction:column;gap:var(--space-2);pointer-events:none;max-width:var(--max-content-width);margin-inline:auto}.toast{pointer-events:auto;display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-left-width:4px;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);font-size:.9rem;color:var(--color-text);opacity:0;transform:translateY(-8px);transition:opacity var(--transition),transform var(--transition);max-width:100%;word-break:break-word}.toast.show{opacity:1;transform:translateY(0)}.toast-success{border-left-color:var(--color-success)}.toast-error{border-left-color:var(--color-danger)}.toast-warning{border-left-color:var(--color-warning)}.toast-info{border-left-color:var(--color-info)}.toast-content{display:flex;align-items:center;gap:var(--space-3);flex:1;min-width:0}.toast-message{flex:1;min-width:0}.toast-close{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-full);font-size:1.2rem;line-height:1;color:var(--color-text-subtle);flex-shrink:0;transition:background var(--transition),color var(--transition)}.toast-close:hover{background:var(--color-bg-subtle);color:var(--color-text)}.result-view,.receiver-section{display:flex;flex-direction:column;gap:var(--space-4)}.send-view{display:flex;flex-direction:column}@media (min-width: 480px){.app-main{padding:var(--space-6) var(--space-6)}.page-header h1{font-size:2rem}.progress-stats{grid-template-columns:repeat(4,1fr)}}@media (min-width: 640px){:root{--max-content-width: 720px}.app-main{padding-block:var(--space-8)}.page-header h1{font-size:2.25rem}.magnet-header{flex-wrap:nowrap}.stats-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-4)}.toast-container{left:auto;right:var(--space-6);max-width:380px}}@media (min-width: 1024px){:root{--max-content-width: 880px}}@media (max-width: 479px){.magnet-actions{width:100%}.magnet-actions .btn{flex:1}.input-group{flex-direction:column}.input-group .btn,.complete-actions{width:100%}.complete-actions .btn{flex:1}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}@media (prefers-contrast: high){:root{--color-border: currentColor;--shadow-sm: none;--shadow-md: none;--shadow-lg: none}}