*{box-sizing:border-box}
:root{font-family:Arial,sans-serif;color:#17212f;background:#e9edf2;font-synthesis:none}
body{margin:0;display:flex;flex-direction:column;height:100vh;height:100dvh;min-height:640px}
header{background:#fff;padding:18px 24px 14px;border-bottom:1px solid #cbd5e1}
.heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
h1{margin:0;font-size:22px;letter-spacing:-.5px}h1 span{font-size:15px;font-weight:400;letter-spacing:0;color:#64748b;margin-left:12px}
.controls{display:flex;flex-wrap:wrap;gap:16px 28px;align-items:flex-end}.control{display:flex;flex-direction:column;gap:7px}
.label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:#64748b}
nav{display:flex;gap:5px;flex-wrap:wrap}button,select{font:13px/1.4 Arial,sans-serif;border:1px solid #cbd5e1;border-radius:6px;background:#fff;color:#17212f}
button{padding:9px 13px;cursor:pointer;min-height:38px}button:hover{background:#f1f5f9}button[aria-pressed=true]{background:#17212f;border-color:#17212f;color:#fff}
button:focus-visible,select:focus-visible{outline:3px solid #38bdf8;outline-offset:3px}.secondary{color:#475569}
.position-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:16px;font-size:12px}.position-bar label{font-weight:600}
select{padding:7px 10px;width:335px;max-width:100%;min-height:36px}select:disabled{opacity:.6}#status{color:#64748b}#status.error{color:#b91c1c}#message{color:#047857;margin-left:auto}
.note{margin:0;padding:10px 24px;color:#475569;font-size:12px;line-height:1.5;background:#f8fafc}
main{flex:1;min-height:340px;overflow:auto;padding:16px}.stage{width:max-content;min-width:100%;height:100%;display:flex;justify-content:center}
iframe{flex:none;display:block;background:#fff;border:1px solid #cbd5e1;height:100%;min-height:330px}
@media(max-width:700px){header{padding:14px 12px 12px}.heading{margin-bottom:14px}h1{font-size:19px}h1 span{display:block;margin:4px 0 0;font-size:12px}.controls{gap:12px}.control:first-child{width:100%}.note{padding:8px 12px}.position-bar{gap:7px;margin-top:12px}.position-bar label{width:100%}select{flex:1;min-width:0}main{padding:10px}button{padding:8px 10px}#message{margin-left:0}}