/* =================================
   RESET BÁSICO
================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

/* =================================
   BODY
================================= */
body {
  background-color: #0b0f14;
  color: #cfd8dc;
  min-height: 100vh;
}

/* =================================
   HEADER
================================= */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: linear-gradient(90deg, #0d47a1, #1e88e5);
  border-bottom: 1px solid #1e88e5;
}

.title-header {
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  text-decoration: none;
}

.prelogo {
  display: flex;
  align-items: center;
}

.logo2 {
  width: 40px;
  height: auto;
}

/* =================================
   MAIN FRAME
================================= */
.main-frame {
  padding: 15px;
}

/* =================================
   CONTENEDOR IFRAME
================================= */
.subiframe {
  max-width: 1100px;
  margin: 0 auto;
}

.preframe {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background-color: #000;
  border-radius: 10px;
  overflow: hidden;
  border: 2px solid #1e88e5;
  box-shadow: 0 0 15px rgba(30, 136, 229, 0.4);
}

.preframe iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* =================================
   BOTÓN RECARGAR
================================= */
.centerfull {
  text-align: center;
  margin-top: 18px;
}

#btnIframe {
  background-color: #e53935;
  color: #ffffff;
  border: none;
  padding: 12px 30px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

#btnIframe:hover {
  background-color: #c62828;
  transform: scale(1.05);
}

/* =================================
   FOOTER
================================= */
footer {
  margin-top: 30px;
  padding: 16px 12px;
  background-color: #06080c;
  text-align: center;
  border-top: 1px solid #1e88e5;
}

.footer-title {
  font-size: 13px;
  color: #90a4ae;
  line-height: 1.5;
}

/* =================================
   RESPONSIVE
================================= */
@media (max-width: 600px) {
  .title-header {
    font-size: 16px;
  }

  #btnIframe {
    width: 100%;
    max-width: 320px;
  }
}