*{box-sizing:border-box}html,body{margin:0;height:100%;background:#0b0f14;color:#f7eedd;font:15px/1.4 system-ui,sans-serif}.presentation{height:100svh;min-height:360px;display:flex;flex-direction:column}header{display:flex;justify-content:space-between;align-items:center;padding:12px 24px;gap:16px}a{color:#f7eedd;text-decoration:none}.brand{font-weight:600}nav{display:flex;gap:8px;align-items:center}button,select{font:inherit;border:1px solid #34404e;border-radius:5px;background:#17212d;color:#f7eedd;padding:7px 11px}button{cursor:pointer}button:disabled{opacity:.3}select{max-width:min(460px,48vw)}.presentation main{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:0 16px}#stage{position:relative;overflow:hidden;flex:none}iframe{position:absolute;inset:0;width:1920px;height:1080px;transform-origin:0 0;border:0;background:#11161c}.hint{text-align:center;color:#b6c3d1;margin:9px 16px 12px;font-size:12px}:fullscreen header,:fullscreen .hint,:fullscreen .reading{display:none}:fullscreen .presentation{height:100vh}:fullscreen main{padding:0}@media(max-width:600px){header{padding:10px;gap:8px}.brand{font-size:13px}nav{gap:5px}button,select{padding:6px;font-size:13px}#fullscreen{font-size:0}#fullscreen::after{content:'⛶';font-size:18px}main{padding:0 6px}}

.read-link{color:#78bbff;margin-right:8px;font-size:14px}.hint a{color:#b6c3d1}.reading a{text-decoration:underline}.reading h1{font-family:system-ui,sans-serif}.reading{font-size:18px;line-height:1.7}

@media(max-width:600px){.presentation header{flex-wrap:wrap}.presentation nav{width:100%}.presentation select{flex:1;min-width:0;max-width:none}.presentation .read-link{margin-right:2px}}