:root{--bg: #0e0e10;--fg: #f5f5f5;--muted: #9aa0a6;--accent: #c89b3c;--accent-strong: #e6b65a;--danger: #d9534f;--card: #1a1a1d}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;width:100%;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;overflow:hidden;-webkit-tap-highlight-color:transparent}#start-screen{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(circle at 30% 20%,rgba(200,155,60,.12),transparent 60%),radial-gradient(circle at 80% 80%,rgba(200,155,60,.08),transparent 60%),var(--bg)}.card{width:100%;max-width:360px;background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:28px 24px;text-align:center;box-shadow:0 20px 60px #00000073}.card h1{margin:0 0 8px;font-size:1.6rem;letter-spacing:.02em}.subtitle{margin:0 0 24px;color:var(--muted);font-size:.95rem}#enter-ar-btn{display:inline-flex;align-items:center;justify-content:center;width:100%;padding:14px 18px;border:none;border-radius:10px;background:var(--accent);color:#1b1305;font-size:1.05rem;font-weight:600;cursor:pointer;transition:background .15s ease,transform .05s ease}#enter-ar-btn:hover:not(:disabled){background:var(--accent-strong)}#enter-ar-btn:active:not(:disabled){transform:scale(.99)}#enter-ar-btn:disabled{background:#3a3a3d;color:#777;cursor:not-allowed}#support-hint{margin:14px 0 0;color:var(--muted);font-size:.85rem;min-height:1.2em}#support-hint.error{color:var(--danger)}.footnote{margin:18px 0 0;color:#6b6e73;font-size:.78rem}#ar-overlay{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:auto;background:transparent;z-index:10}#ar-overlay[hidden]{display:none}#ar-controls{position:absolute;top:max(16px,env(safe-area-inset-top));right:max(16px,env(safe-area-inset-right));display:flex;gap:10px;pointer-events:auto}#ar-controls button{width:48px;height:48px;border:none;border-radius:24px;background:#141416b3;color:var(--fg);font-size:1.1rem;cursor:pointer;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;transition:background .15s ease}#ar-controls button:active{background:#28282cd9}#ar-hint{position:absolute;bottom:max(28px,env(safe-area-inset-bottom));left:50%;transform:translate(-50%);margin:0;padding:10px 16px;background:#0000008c;border-radius:999px;font-size:.9rem;color:var(--fg);pointer-events:none;transition:opacity .4s ease;white-space:nowrap}#ar-hint.fade{opacity:0}