:root{
  --orange-600: #ff7a00;
  --orange-500: #ff8a33;
  --orange-400: #ff9f66;
  --bg: #fff7f2;
  --muted: #6b6b6b;
  --card: #ffffff;
  --shadow: rgba(17,17,17,0.06);
}

*{box-sizing:border-box}
html{
  min-height:100%;
  background: linear-gradient(135deg, var(--orange-600) 0%, var(--orange-400) 100%);
}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: transparent;
  color:#222;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  overflow:auto;
}

.container{max-width:1100px;margin:0 auto;padding:18px}

.site-header{background:linear-gradient(90deg,var(--orange-600),var(--orange-500));color:white}
.header-inner{display:flex;align-items:center;justify-content:center;flex:0 0 84px}
.brand{font-size:2.25rem;margin:0;padding:8px 0;font-weight:700}
.main-nav a{color:rgba(255,255,255,0.95);text-decoration:none;margin-left:16px;font-weight:600}
.main-nav a:hover{text-decoration:underline}

/* Main area fills remaining space between header and footer.
  Center the fixed-size iframe wrapper horizontally and vertically. */
/* simple non-responsive layout for the applet wrapper */
.main-grid{display:block;padding:22px 18px;}
.content{display:block;}

.iframe-wrap{background:var(--card);border-radius:10px;box-shadow:0 6px 20px var(--shadow);overflow:hidden;border:1px solid rgba(0,0,0,0.04);width:890px;height:790px;margin:0 auto;}
.iframe-wrap iframe{width:1200px;height:900px;border:0;display:block}
.iframe-wrap iframe{background:#fff}
.iframe-fallback{padding:18px;color:var(--muted);display:none}

.sidebar{align-self:start;background:linear-gradient(180deg,#fff,#fff);padding:16px;border-radius:10px;border:1px solid rgba(0,0,0,0.03);box-shadow:0 6px 18px var(--shadow);overflow:auto}
.sidebar h2{margin-top:0}
.sidebar p{color:var(--muted)}

.site-footer{background:transparent;color:black;padding:12px 0;flex:0 0 56px}
.footer-inner{text-align:center;font-size:0.95rem}

/* Responsive */
@media (max-width: 900px){
  .main-grid{grid-template-columns:1fr;}
  .iframe-wrap iframe{height:520px}
}

@media (prefers-color-scheme: dark){
  :root{--bg:#0b0b0b;--card:#0f0f10;color:#eaeaea}
  .main-nav a{color:rgba(255,255,255,0.9)}
}