html, body { margin: 0; padding: 0; width: 100%; height: 100%; background: #0a0f18; overflow: hidden; font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
#unity-container { position: fixed; inset: 0; }
#unity-canvas { width: 100%; height: 100%; display: block; background: #0a0f18; }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none; text-align: center; color: #ffffff; }
#arp-logo { width: 76px; height: 76px; image-rendering: auto; filter: drop-shadow(0 6px 18px rgba(0,0,0,0.5)); }
#arp-title { margin-top: 18px; font-size: 26px; font-weight: 700; letter-spacing: 0.5px; }
#arp-subtitle { margin-top: 4px; font-size: 14px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: #d96a6a; }
#unity-progress-bar-empty { width: 300px; height: 10px; margin: 24px auto 0 auto; background: rgba(255,255,255,0.15); border-radius: 5px; overflow: hidden; }
#unity-progress-bar-full { width: 0%; height: 10px; background: #a83a3a; border-radius: 5px; transition: width 0.2s; }
#arp-hint { margin-top: 14px; font-size: 13px; color: #b8c4d0; }
#unity-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none; }

/* ---- WebGL help panel ---- */
#arp-help { position: absolute; inset: 0; overflow: auto; background: #0f1520; color: #e6edf3; font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; padding: 40px 24px; box-sizing: border-box; text-align: center; }
#arp-help[hidden] { display: none; }
#arp-help .arp-help-logo { width: 76px; height: 76px; object-fit: contain; }
#arp-help h1 { font-size: 26px; margin: 12px 0 8px; }
#arp-help p { max-width: 760px; margin: 0 auto 22px; line-height: 1.5; color: #b8c4d0; }
#arp-help .arp-help-cols { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; max-width: 1100px; margin: 0 auto; }
#arp-help section { flex: 1 1 300px; max-width: 360px; background: #171f2b; border: 1px solid #263040; border-radius: 10px; padding: 16px 18px; text-align: left; }
#arp-help section.arp-current { border-color: #33cc73; box-shadow: 0 0 0 2px rgba(51, 204, 115, 0.25); }
#arp-help h2 { font-size: 19px; margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
#arp-help .arp-you { display: none; font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: #0f1520; background: #33cc73; border-radius: 999px; padding: 2px 8px; }
#arp-help section.arp-current .arp-you { display: inline-block; }
#arp-help ol { margin: 0; padding-left: 20px; line-height: 1.5; font-size: 15px; }
#arp-help li { margin-bottom: 6px; }
#arp-help code { background: #0b0f16; border: 1px solid #263040; border-radius: 4px; padding: 1px 5px; font-size: 13px; }
#arp-help .arp-help-foot { margin-top: 26px; font-size: 14px; }
#arp-help a { color: #33cc73; }