/* Minimal, modern, editierbar über CSS-Variablen */
:root{
  --brand-bg: #0b0f12;
  --brand-card: #121821;
  --brand-accent: #7ae1ff;
  --brand-text: #e7eef7;
  --brand-muted: #9fb0c0;
  --radius: 14px;
  --gap: 14px;
  --shadow: 0 8px 24px rgba(0,0,0,.25);
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(122,225,255,.08), transparent),
              radial-gradient(1000px 600px at 110% 10%, rgba(122,225,255,.06), transparent),
              var(--brand-bg);
  color:var(--brand-text);
  font-family:var(--font);
  line-height:1.5;
}
.container{max-width:860px;margin:0 auto;padding:24px}
.hero{text-align:center;margin:20px 0 28px}
.logo{height:42px;margin-bottom:10px;opacity:.9}
h1{font-size:clamp(1.5rem,2.2vw,2.2rem);margin:8px 0 8px}
.hero p{color:var(--brand-muted);margin:0}

#quiz, #result{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
}

#progress{display:flex;align-items:center;gap:10px;margin-bottom:14px}
#progress-text{font-size:.95rem;color:var(--brand-muted)}
#bar{flex:1;height:8px;background:#0a121a;border-radius:99px;overflow:hidden;border:1px solid rgba(255,255,255,.07)}
#bar-fill{height:100%;width:0;background:linear-gradient(90deg, var(--brand-accent), #b0f0ff);transition:width .25s ease}

#card{background:var(--brand-card);border-radius:var(--radius);padding:18px;border:1px solid rgba(255,255,255,.06)}

#question{margin:0 0 10px;font-size:1.15rem}
.options{display:grid;gap:var(--gap)}
.option{
  display:flex;align-items:flex-start;gap:12px;
  background:#0f1620;border:1px solid rgba(255,255,255,.06);
  border-radius:12px;padding:12px;cursor:pointer;transition:transform .05s ease, border-color .2s;
}
.option:hover{border-color:rgba(122,225,255,.35)}
.option input{margin-top:3px}
.option label{display:block;cursor:pointer}
.option .key{display:inline-block;min-width:24px;font-weight:600;opacity:.85}

.controls{display:flex;justify-content:space-between;margin-top:16px}
.btn{
  background:var(--brand-accent);
  color:#001018;
  border:none;border-radius:999px;padding:10px 16px;
  font-weight:700;cursor:pointer;
}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{
  background:transparent;color:var(--brand-text);
  border:1px solid rgba(255,255,255,.2);
}

#result.hidden, #quiz.hidden{display:none}

.result-actions{margin-top:14px}
.foot{opacity:.6;text-align:center;margin-top:16px}