:root{--primary-gradient:linear-gradient(135deg,#5ebbff,#4db3ff);--primary-color:#5ebbff;--primary-hover:#4db3ff;--bg-primary:#f9fafb;--bg-secondary:#f3f4f6;--bg-tertiary:#e5e7eb;--card-bg:#fff;--modal-bg:hsla(0,0%,100%,.9);--modal-overlay:rgba(0,0,0,.5);--text-primary:#1f2937;--text-secondary:#4b5563;--text-tertiary:#6b7280;--border-color:#e5e7eb;--divider-color:#f3f4f6;--button-secondary:linear-gradient(135deg,#9ca3af,#6b7280);--button-text:#fff;--input-bg:#fff;--input-border:#e5e7eb;--input-focus:#5ebbff;--success:#22c55e;--error:#ef4444;--warning:#f59e0b;--shadow-sm:0 1px 2px rgba(94,187,255,.1);--shadow-md:0 4px 6px rgba(94,187,255,.15);--spark-color:rgba(94,187,255,.8);--button-gap:2rem;--button-scale:1.02;--button-press-scale:0.98;--transition-duration:0.5s;--transition-easing:cubic-bezier(0.4,0,0.2,1)}[data-theme=dark]{--primary-gradient:linear-gradient(135deg,#4a5568,#3d4755);--primary-color:#4a5568;--primary-hover:#3d4755;--bg-primary:#111827;--bg-secondary:#1f2937;--bg-tertiary:#374151;--card-bg:#1f2937;--modal-bg:rgba(17,24,39,.9);--modal-overlay:rgba(0,0,0,.7);--text-primary:#f9fafb;--text-secondary:#e5e7eb;--text-tertiary:#d1d5db;--border-color:#374151;--divider-color:#374151;--button-secondary:linear-gradient(135deg,#4b5563,#374151);--button-text:#fff;--input-bg:#374151;--input-border:#4b5563;--input-focus:#4a5568;--success:#34d399;--error:#f87171;--warning:#fbbf24;--shadow-sm:0 1px 2px rgba(0,0,0,.3);--shadow-md:0 4px 6px rgba(0,0,0,.4);--spark-color:rgba(74,85,104,.8)}body{color:var(--text-primary);display:flex;flex-direction:column;margin:0;min-height:100vh;overflow-x:hidden;padding:0;transition:all .3s ease}body,footer{background-color:var(--bg-primary);transition:background-color var(--transition-duration) var(--transition-easing),color var(--transition-duration) var(--transition-easing)}footer{margin-top:auto;padding:1.5rem 0;width:100%;z-index:10}[data-theme] .inner-content{transition:background-color var(--transition-duration) var(--transition-easing),box-shadow var(--transition-duration) var(--transition-easing)}.title-container{padding-bottom:1rem;padding-top:2rem}.btn-primary{background:var(--primary-gradient);box-shadow:var(--shadow-sm);color:var(--button-text);transition:all .3s ease}.flex.flex-col.md\:flex-row.gap-4{gap:2rem!important;margin:0 1rem;max-width:600px;position:relative;width:100%;z-index:5}.btn-primary:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn-secondary{background:var(--button-secondary);color:var(--button-text);transition:all .3s ease}.btn-secondary:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.modal{backdrop-filter:blur(4px);background:var(--modal-overlay);transition:all .3s ease}.modal-content{backdrop-filter:blur(10px);background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;box-shadow:0 10px 25px rgba(0,0,0,.1);color:var(--text-primary);opacity:0;transform:translateY(20px) scale(.98);transition:all .4s cubic-bezier(.175,.885,.32,1.275)}.modal.active .modal-content{opacity:1;transform:translateY(0) scale(1)}.progress-bar{animation:progressGradient 2s linear infinite;background:linear-gradient(90deg,var(--primary-color) 0,#40ffaa 50%,var(--primary-color) 100%);background-size:200% 100%;border-radius:9999px;height:100%;transition:width .5s cubic-bezier(.4,0,.2,1)}@keyframes progressGradient{0%{background-position:100% 0}to{background-position:-100% 0}}.file-info{background-color:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:12px;transition:all .3s ease}.file-info:hover,.share-item{background:var(--bg-secondary)}.share-item{border:1px solid var(--border-color);transition:all .3s ease}.share-item:hover{background:var(--bg-tertiary)}.copy-button{color:var(--primary-color);opacity:.7;transition:all .2s ease;-webkit-tap-highlight-color:transparent;background:transparent;border:none}.copy-button:hover{opacity:1;transform:scale(1.1)}.copy-button:active,.copy-button:focus{box-shadow:none;outline:none}.copy-button.copied{color:#22c55e;position:relative;transform:scale(1.12);transition:transform .2s ease,color .2s ease,box-shadow .2s ease}.copy-button.copied:after{animation:copy-pulse .5s ease-out 1;border:2px solid rgba(34,197,94,.45);border-radius:9999px;content:"";inset:-6px;pointer-events:none;position:absolute}@keyframes copy-pulse{0%{opacity:.9;transform:scale(.9)}to{opacity:0;transform:scale(1.2)}}input[type=text]{background:var(--input-bg);border:1px solid var(--input-border);color:var(--text-primary);transition:all .3s ease}input[type=text]:focus{border-color:var(--input-focus);box-shadow:0 0 0 3px rgba(94,187,255,.1);outline:none}.star-border-container{display:inline-block;margin:.5rem;overflow:visible;padding:.5rem;position:relative;width:100%;z-index:1}.border-gradient-bottom{animation:star-movement-bottom 8s linear infinite alternate;bottom:-11px;right:-250%}.border-gradient-bottom,.border-gradient-top{background:radial-gradient(circle,#5ebbff,transparent 70%);border-radius:50%}.border-gradient-top{animation:star-movement-top 8s linear infinite alternate;left:-250%;top:-10px}[data-theme=dark] .border-gradient-bottom,[data-theme=dark] .border-gradient-top{background:radial-gradient(circle,#4a5568,transparent 70%)}.inner-content{background:var(--primary-color);border:none;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,.1);color:#fff;cursor:pointer;font-size:16px;font-weight:500;overflow:hidden;padding:18px 32px;position:relative;text-align:center;transform:translateY(0) scale(1);transition:all .3s ease;z-index:1}.inner-content:hover{background:var(--primary-hover);box-shadow:0 4px 12px rgba(0,0,0,.15);transform:scale(1.02)}.inner-content:active{box-shadow:0 1px 4px rgba(0,0,0,.1);transform:scale(.98)}.inner-content:after{background:hsla(0,0%,100%,.2);border-radius:50%;content:"";height:0;left:50%;opacity:0;position:absolute;top:50%;transform:translate(-50%,-50%);transition:width .4s ease-out,height .4s ease-out,opacity .4s ease-out;width:0}.inner-content:active:after{height:200px;opacity:1;transition:width 0s,height 0s,opacity .3s ease-out;width:200px}.border-gradient-bottom,.border-gradient-top,.inner-content:before{display:none}#uploadBtn{background:#4db3ff}#uploadBtn:hover{background:#3aa9ff}#receiveBtn{background:#4079ff}#receiveBtn:hover{background:#3068ff}[data-theme=dark] .inner-content{background:#4a5568;box-shadow:0 2px 8px rgba(0,0,0,.2)}[data-theme=dark] .inner-content:hover{background:#3d4755;box-shadow:0 4px 12px rgba(0,0,0,.25)}[data-theme=dark] .inner-content:active{background:#2d3748;box-shadow:0 1px 4px rgba(0,0,0,.15)}[data-theme=dark] #uploadBtn{background:#4a5568}[data-theme=dark] #uploadBtn:hover{background:#3d4755}[data-theme=dark] #receiveBtn{background:#4a5568}[data-theme=dark] #receiveBtn:hover{background:#3d4755}.theme-switch{background:#5ebbff;border:1px solid hsla(0,0%,100%,.1);border-radius:50%;bottom:1rem;box-shadow:0 4px 6px rgba(94,187,255,.2);cursor:pointer;left:1rem;padding:.75rem;position:fixed;transform-origin:center;transition:all .4s cubic-bezier(.4,0,.2,1);z-index:50}.theme-switch:hover{background:#4db3ff;box-shadow:0 8px 15px rgba(94,187,255,.25);transform:translateY(-3px) rotate(12deg) scale(1.1)}.theme-switch:active{background:#3aa9ff;box-shadow:0 2px 4px rgba(94,187,255,.1);transform:translateY(1px) rotate(-12deg) scale(.95)}[data-theme=dark] .theme-switch{background:#4a5568;box-shadow:0 4px 6px rgba(0,0,0,.2)}[data-theme=dark] .theme-switch:hover{background:#3d4755;box-shadow:0 8px 15px rgba(0,0,0,.25)}[data-theme=dark] .theme-switch:active{background:#2d3748;box-shadow:0 2px 4px rgba(0,0,0,.1)}#notification{background:var(--card-bg);border:1px solid var(--border-color);box-shadow:var(--shadow-md)}.notification{animation:slideIn .5s ease forwards}.gradient-title{animation:gradient 8s linear infinite;background:linear-gradient(90deg,#40ffaa,#4079ff,#40ffaa,#4079ff,#40ffaa);background-clip:text;-webkit-background-clip:text;background-size:300% 100%;color:transparent;cursor:pointer;display:flex;font-size:3rem;font-weight:700;margin:0 auto;max-width:fit-content;padding:3rem 0;position:relative;text-shadow:0 0 30px rgba(64,255,170,.3);transition:transform .3s ease}.title-container{animation:fadeInDown 1s ease forwards;margin-bottom:3rem;opacity:0;text-align:center;transform:translateY(20px);width:100%}[data-theme=dark] .gradient-title{background:linear-gradient(90deg,#40ffb5,#4079ff,#40ffb5,#4079ff,#40ffb5);background-clip:text;-webkit-background-clip:text;background-size:300% 100%;color:transparent;opacity:1;text-shadow:0 0 10px rgba(64,255,181,.5)}.gradient-title:hover{transform:scale(1.05)}@keyframes fadeInDown{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{transform:translateX(100%)}to{transform:translateX(0)}}@keyframes gradient{0%{background-position:0 50%}50%{background-position:100% 50%}to{background-position:0 50%}}@keyframes star-movement-bottom{0%{opacity:.5;transform:translate(0) rotate(0deg)}50%{opacity:.3;transform:translate(-50%) rotate(-5deg)}to{opacity:.5;transform:translate(-100%) rotate(0deg)}}@keyframes star-movement-top{0%{opacity:.5;transform:translate(0) rotate(0deg)}50%{opacity:.3;transform:translate(50%) rotate(5deg)}to{opacity:.5;transform:translate(100%) rotate(0deg)}}@keyframes slideUp{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}.animate-slide-up{animation:slideUp 1s ease forwards}#dropZone{align-items:center;background-color:rgba(0,0,0,.5);bottom:0;display:none;justify-content:center;left:0;position:fixed;right:0;top:0;z-index:40}#dropZone div{background-color:rgba(0,0,0,.3);border:2px dashed #fff;border-radius:1rem;color:#fff;font-size:1.5rem;padding:2rem;text-align:center}#particleCanvas{height:100%;left:0;pointer-events:none;position:fixed;top:0;width:100%;z-index:-1}@media (max-width:640px){.gradient-title{font-size:2rem;padding:1.5rem 0}.modal-content{margin:1rem;padding:1.5rem}.inner-content{padding:14px 24px}#dropZone div{padding:2rem}.flex.flex-col.md\:flex-row.gap-4{gap:1rem!important}}.space-btn{align-items:center;animation:gradient_301 5s ease infinite;backdrop-filter:blur(1rem);background-clip:content-box,border-box;background-image:linear-gradient(var(--bg-secondary),var(--bg-secondary)),linear-gradient(137.48deg,#5ebbff 10%,#40ffaa 45%,#4079ff 67%,#5e7eff 87%);background-origin:border-box;background-size:300% 300%;border:4px double transparent;border-radius:5rem;cursor:pointer;display:flex;height:3.5rem;justify-content:center;position:relative;transition:all .5s cubic-bezier(.4,0,.2,1);width:100%;z-index:2}[data-theme=dark] .space-btn{background-image:linear-gradient(var(--bg-secondary),var(--bg-secondary)),linear-gradient(137.48deg,#4a5568 10%,#34d399 45%,#3b82f6 67%,#4c6ef5 87%)}.container-stars{backdrop-filter:blur(1rem);border-radius:5rem;height:100%;overflow:hidden;position:absolute;transition:.5s;width:100%;z-index:-1}.space-btn strong{font-family:inherit;font-size:16px;font-weight:600;letter-spacing:2px;z-index:2}.space-btn strong,[data-theme=dark] .space-btn strong{color:var(--text-primary);text-shadow:0 0 4px var(--primary-color)}.glow{display:flex;position:absolute;width:12rem}.circle{animation:pulse_3011 4s infinite;filter:blur(2rem);height:30px;width:100%;z-index:-1}.upload-circle-1{background:rgba(94,187,255,.636)}.upload-circle-2{background:rgba(64,255,170,.704)}.receive-circle-1{background:rgba(64,121,255,.636)}.receive-circle-2{background:rgba(94,126,255,.704)}[data-theme=dark] .upload-circle-1{background:rgba(74,85,104,.636)}[data-theme=dark] .upload-circle-2{background:rgba(52,211,153,.704)}[data-theme=dark] .receive-circle-1{background:rgba(74,85,104,.636)}[data-theme=dark] .receive-circle-2{background:rgba(59,130,246,.704)}.space-btn:hover{box-shadow:0 0 20px rgba(94,187,255,.3);transform:scale(1.05);z-index:10}.space-btn:active{animation:none;background-clip:content-box,border-box;background-origin:border-box;border:4px double var(--primary-color)}@media (max-width:640px){.space-btn.restoring,.space-btn:active{animation:gradient_301 5s ease infinite!important;transform:none!important}.space-btn.restoring{box-shadow:0 0 20px rgba(94,187,255,.3)!important}}.space-btn:active .circle{background:var(--primary-color)}.space-btn:hover .container-stars{background-color:var(--bg-secondary);z-index:1}.stars{background:transparent;height:200rem;position:relative;width:200rem}.stars:after{animation:animStarRotate 90s linear infinite;background-image:radial-gradient(var(--text-primary) 1px,transparent 1%);background-size:50px 50px;height:100%;left:-100rem;top:-10rem;width:100%}.stars:after,.stars:before{content:"";position:absolute}.stars:before{animation:animStar 60s linear infinite;background-image:radial-gradient(var(--text-primary) 1px,transparent 1%);background-size:50px 50px;height:500%;left:-50%;opacity:.5;top:0;width:170%}@keyframes animStar{0%{transform:translateY(0)}to{transform:translateY(-135rem)}}@keyframes animStarRotate{0%{transform:rotate(1turn)}to{transform:rotate(0)}}@keyframes gradient_301{0%{background-position:0 50%}50%{background-position:100% 50%}to{background-position:0 50%}}@keyframes pulse_3011{0%{box-shadow:0 0 0 0 rgba(0,0,0,.7);transform:scale(.75)}70%{box-shadow:0 0 0 10px transparent;transform:scale(1)}to{box-shadow:0 0 0 0 transparent;transform:scale(.75)}}@media (max-width:640px){.space-btn{height:3rem}.space-btn strong{font-size:14px;letter-spacing:1px}}.multi-file-list{margin-bottom:1rem;max-height:300px;padding-right:.5rem}.custom-scrollbar::-webkit-scrollbar{height:6px;width:6px}.custom-scrollbar::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:10px}.custom-scrollbar::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:10px}.custom-scrollbar::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.file-preview-list{margin-bottom:1rem;max-height:300px;padding-right:.5rem}.file-preview-container{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;margin-bottom:1rem;padding:1rem}.file-preview-header{align-items:center;color:var(--text-primary);display:flex;font-weight:600;justify-content:space-between;margin-bottom:.5rem}.file-preview-list{max-height:8rem;overflow-y:auto}.file-preview-item{align-items:center;display:flex;font-size:.875rem;justify-content:space-between;padding:.25rem 0}.file-preview-name{color:var(--text-secondary);flex:1;margin-right:.5rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-preview-size{color:var(--text-tertiary);white-space:nowrap}.file-preview-remove{color:var(--error);cursor:pointer;margin-left:.5rem;opacity:.6;transition:opacity .2s}.file-preview-remove:hover{opacity:1}.file-preview-total{border-top:1px solid var(--border-color);color:var(--text-primary);font-size:.875rem;font-weight:600;margin-top:.5rem;padding-top:.5rem}.expire-label{backdrop-filter:blur(5px);background:var(--bg-secondary);border:1px solid var(--border-color);box-shadow:0 1px 2px rgba(0,0,0,.05);color:var(--text-secondary);display:flex;flex-direction:column;justify-content:center;min-height:68px;position:relative;transition:all .25s ease}.expire-label:hover{background:rgba(94,187,255,.05);border-color:var(--primary-color);box-shadow:0 3px 6px rgba(0,0,0,.08);transform:translateY(-1px)}input[name=expireTime]:checked+.expire-label{background:rgba(94,187,255,.08);border-color:var(--primary-color);border-width:2px;box-shadow:0 3px 8px rgba(94,187,255,.15);color:var(--primary-color);transform:translateY(-1px)}input[name=expireTime]:checked+.expire-label:after{background:var(--primary-color);border-radius:50%;content:"";height:6px;position:absolute;right:8px;top:8px;width:6px}.expire-option{position:relative;transition:transform .25s ease}.expire-option:hover{transform:translateY(-1px)}#expireSelection{background:var(--bg-secondary);border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.08);padding:1.5rem}#expireSelection h4{color:var(--text-primary);font-weight:600}#confirmExpireTime{background:var(--primary-color);box-shadow:0 2px 5px rgba(94,187,255,.2);transition:all .25s ease}#confirmExpireTime:hover{box-shadow:0 4px 8px rgba(94,187,255,.3);transform:translateY(-1px)}#dropZone.drag-active,#dropZone.drag-active div{background-color:rgba(94,187,255,.1)}#dropZone.drag-active div{border-color:var(--primary-color);transform:scale(1.05)}.file-preview-list::-webkit-scrollbar,.max-h-48::-webkit-scrollbar{width:6px}.file-preview-list::-webkit-scrollbar-track,.max-h-48::-webkit-scrollbar-track{background:var(--bg-tertiary);border-radius:3px}.file-preview-list::-webkit-scrollbar-thumb,.max-h-48::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.file-preview-list::-webkit-scrollbar-thumb:hover,.max-h-48::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}.multi-file-info{background:var(--bg-secondary);border-radius:8px;padding:1rem}.multi-file-list{max-height:12rem;overflow-y:auto}.multi-file-item{align-items:center;border-bottom:1px solid var(--divider-color);display:flex;justify-content:space-between;padding:.5rem 0}.multi-file-item:last-child{border-bottom:none}.multi-file-name{color:var(--text-secondary);flex:1;font-size:.875rem;margin-right:1rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.multi-file-size{color:var(--text-tertiary);font-size:.75rem;white-space:nowrap}.multi-file-summary{border-top:1px solid var(--divider-color);margin-top:1rem;padding-top:1rem}@media (max-width:640px){#shareLink{display:block;max-width:100%;overflow-x:auto;overflow-y:hidden;white-space:nowrap;-webkit-overflow-scrolling:touch;cursor:default;flex:1 1 auto;min-width:0}}#shareLink{display:block;flex:1 1 auto;min-width:0;overflow-x:auto;overflow-y:hidden;white-space:nowrap;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none;overflow-wrap:normal;word-break:normal}#shareLink::-webkit-scrollbar{background:transparent;display:none;height:0;width:0}.share-label{color:var(--text-secondary);flex:0 0 auto;margin-right:.75rem;white-space:nowrap}.share-link-wrap{flex:1 1 auto;min-width:0}.copy-button{flex:0 0 auto}