: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}canvas{display:block;width:100%;height:100%;touch-action:none}.welcome-container{display:flex;align-items:center;justify-content:center;width:100%;height:100%;background:radial-gradient(circle at center,#1b264f,#0b1020);color:#f8fafc}.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:48px;width:90%;max-width:480px;text-align:center;box-shadow:0 20px 40px #0006}.welcome-title{font-size:32px;font-weight:800;margin:0 0 12px;background:linear-gradient(135deg,#38bdf8,#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.5px}.welcome-subtitle{font-size:15px;color:#94a3b8;margin:0 0 36px}.welcome-error{background:#ef444426;border:1px solid rgba(239,68,68,.3);color:#fca5a5;border-radius:12px;padding:12px 16px;font-size:13px;margin-bottom:24px;line-height:1.4}.welcome-buttons{display:flex;flex-direction:column;gap:16px}.welcome-btn{display:flex;align-items:center;justify-content:center;gap:12px;padding:14px 24px;border-radius:14px;font-size:15px;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:28px;display:flex;flex-direction:column;gap:12px;padding-top:24px;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:12px 16px;color:#fff;font-size:14px;font-family:inherit;outline:none;transition:all .2s}.viewer-input-section input:focus{border-color:#38bdf8;background:#ffffff0f;box-shadow:0 0 0 2px #38bdf826}.share-badge-container{position:absolute;top:16px;left:16px;z-index:100;pointer-events:auto}.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}