/* ===========================
   Tema oscuro — Trivia Cripto
   =========================== */
:root{
  --bg:#0f0f0f; --panel:#151515; --panel-2:#1b1b1b; --line:#262626; --line-2:#2b2b2b;
  --text:#e9e9e9; --muted:#bdbdbd; --green:#7aff7a; --green-2:#1d8f2d; --red:#c92430;
  --red-2:#7a2323; --btn:#2f2f2f; --shadow:rgba(0,0,0,.35); --radius-lg:14px; --radius-md:12px;
}

html,body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.45}
.wrapper{padding:18px}
.container{
  max-width:980px;margin:0 auto;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:20px;box-shadow:0 0 20px var(--shadow)
}

h1{margin:4px 0 10px;text-align:center;color:var(--green);letter-spacing:.2px}
.intro{background:#101010;border:1px solid var(--line-2);border-radius:12px;padding:12px 14px;color:var(--muted)}
.ayuda{color:var(--muted);font-size:.9rem;margin:.4rem 0 1rem}

/* Progreso */
.progreso{height:10px;background:#0d0d0d;border:1px solid var(--line);border-radius:999px;margin:14px 0;overflow:hidden}
.progreso span{display:block;height:100%;width:0;background:linear-gradient(90deg,#2ecc71,#7aff7a);transition:width .25s ease}

/* Tarjetas de preguntas */
.trivia .pregunta{
  margin:16px 0;background:var(--panel-2);border:1px solid var(--line-2);border-radius:12px;padding:14px
}
.pregunta h3{margin:0 0 10px;font-size:1.05rem}
.pregunta .op{display:block;margin:.35rem 0;padding:.35rem .45rem;border-radius:8px}
.pregunta .op input{margin-right:.45rem}
.pregunta .op:has(input:focus-visible){outline:3px solid rgba(122,255,122,.25)}
.pregunta .exp{margin-top:8px;background:#121212;border:1px solid #2a2a2a;border-radius:8px;padding:8px;color:#d7d7d7}

/* Botones */
.btn{border:none;padding:10px 14px;border-radius:12px;cursor:pointer;font-weight:700;transition:transform .06s,filter .15s;outline:none}
.btn:hover{filter:brightness(1.08)} .btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.6;cursor:not-allowed}
.sube{background:var(--green-2);color:#fff}
.secundario{background:var(--btn);color:#ddd}
.peligro{background:var(--red-2);color:#fff}
.acciones{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:12px 0}

/* Resultado y revisión */
.resultado{margin-top:10px;background:#101010;border:1px solid #242424;border-radius:12px;padding:12px}
.resultado .punt{font-size:1.2rem;font-weight:800;color:var(--green)}
.mejor{color:var(--muted);margin:.5rem 0 1rem}
.divisor{border:0;border-top:1px solid var(--line-2);margin:18px 0}
.revision-wrap{background:#111;border:1px solid #242424;border-radius:12px;padding:12px}
.revision{margin:0;padding-left:1.2rem}
.revision li{margin:.5rem 0}

/* Estado correcto/incorrecto en la tarjeta */
.correcta{border-color:#2ea043}
.incorrecta{border-color:#c43d44}

/* Enlaces & volver */
.volver{text-align:center;margin-top:16px}
.volver a{color:var(--green);text-decoration:none}
.volver a:hover{text-decoration:underline}

/* Responsivo */
@media (max-width:720px){
  .wrapper{padding:14px}
  .container{padding:16px}
  .btn{min-width:140px}
}