:root{--page-background: #0b1020}*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0;overflow:hidden;background:var(--page-background);font-family:Inter,Arial,sans-serif}#app{position:relative}.app-loading{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;background:var(--page-background);pointer-events:none}.app-loading-spinner{width:28px;height:28px;border:3px solid rgba(248,250,252,.2);border-top-color:#38bdf8;border-radius:50%;animation:app-loading-spin .75s linear infinite}@keyframes app-loading-spin{to{transform:rotate(360deg)}}canvas{display:block;width:100%;height:100%;touch-action:none;opacity:0}canvas.canvas-fade-in{animation:canvas-fade-in .28s ease-out .2s forwards}@keyframes canvas-fade-in{0%{opacity:0}to{opacity:1}}.welcome-container{position:relative;width:100%;height:100%;overflow:hidden;padding-left:4px;padding-right:4px;box-sizing:border-box;background:radial-gradient(circle at center,#1b264f,#0b1020);color:#f8fafc}.welcome-stage{position:absolute;top:0;left:0;width:360px;height:520px;transform-origin:0 0;display:flex;align-items:center;justify-content:center}.welcome-box{background:#0f172a73;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.08);border-radius:24px;padding:36px 28px;width:100%;max-height:100%;box-sizing:border-box;text-align:center;box-shadow:0 20px 40px #0006;overflow:auto}.welcome-title{font-size:28px;font-weight:800;margin:0 0 10px;background:linear-gradient(135deg,#38bdf8,#a855f7);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.5px}.welcome-subtitle{font-size:14px;color:#94a3b8;margin:0 0 28px}.welcome-error{background:#ef444426;border:1px solid rgba(239,68,68,.3);color:#fca5a5;border-radius:12px;padding:10px 14px;font-size:12px;margin-bottom:20px;line-height:1.4}.welcome-buttons{display:flex;flex-direction:column;gap:12px}.welcome-btn{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 20px;border-radius:14px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);border:none;font-family:inherit;color:#fff}.welcome-btn.primary{background:linear-gradient(135deg,#38bdf8,#0284c7);box-shadow:0 4px 12px #38bdf833}.welcome-btn.primary:hover{transform:translateY(-2px);box-shadow:0 6px 18px #38bdf859;filter:brightness(1.1)}.welcome-btn.secondary{background:#ffffff0d;border:1px solid rgba(255,255,255,.1)}.welcome-btn.secondary:hover{background:#ffffff14;border-color:#fff3;transform:translateY(-2px)}.viewer-input-section{margin-top:22px;display:flex;flex-direction:column;gap:10px;padding-top:20px;border-top:1px solid rgba(255,255,255,.06);transition:all .3s ease}.viewer-input-section.hidden,.welcome-error.hidden{display:none}.viewer-input-section input{background:#ffffff08;border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:10px 14px;color:#fff;font-size:13px;font-family:inherit;outline:none;transition:all .2s;width:100%;box-sizing:border-box}.viewer-input-section input:focus{border-color:#38bdf8;background:#ffffff0f;box-shadow:0 0 0 2px #38bdf826}.share-badge-container{position:absolute;top:8px;left:8px;z-index:100;pointer-events:auto;max-width:calc(100% - 16px);box-sizing:border-box}.share-badge-content{display:flex;align-items:center;gap:3px;background:#0f172a99;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:3px 5px;font-size:13px;color:#94a3b8;box-shadow:0 4px 12px #0000004d}.share-badge-label{font-weight:500}.share-badge-value{color:#38bdf8;font-weight:700;letter-spacing:.5px}.share-badge-btn{background:#38bdf81a;border:1px solid rgba(56,189,248,.2);color:#38bdf8;border-radius:6px;padding:4px 8px;font-size:11px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}.share-badge-btn:hover{background:#38bdf82e;border-color:#38bdf859}.share-badge-btn.copied{background:#22c55e26;border-color:#22c55e4d;color:#4ade80}