*{box-sizing:border-box}body{margin:0;display:flex;flex-direction:column;height:100vh;height:100dvh;background:#142d46;color:white;font:15px/1.45 Arial,sans-serif}header,footer{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;flex-wrap:wrap}header strong{display:block;font-size:20px}header span{display:block;margin-top:6px;font-size:clamp(20px,2.2vw,28px);font-weight:700;line-height:1.3;color:#fff}footer{font-size:12px;color:#d3e2ec}nav{display:flex;gap:8px}button{font:inherit;border:1px solid #829cab;background:#fff;color:#142d46;border-radius:4px;min-width:44px;min-height:44px;padding:8px 12px;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #b3e4ff;outline-offset:3px}#t80-viewer{flex:1;min-height:180px;background:#eaf2f6}footer a{color:white}#t80-viewer:focus-visible{outline:3px solid #6eb0d3;outline-offset:-3px}@media(max-width:540px){header,footer{padding:10px 12px}header strong{font-size:17px}button{font-size:12px;padding:6px 9px}}