/* Reset básico */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Cuerpo general */
body {
  font-family: 'Inter', Arial, Helvetica, sans-serif;
  background: #fff;
  color: #222;
  line-height: 1.6;
  max-width: 900px;
  margin: auto;
  padding: 32px 8vw 32px 8vw;
}

/* Títulos */
h1, h3, h4 {
  margin-bottom: 0.6em;
  font-weight: 700;
  color: #2a2a2a;
}

h1 {
  font-size: 2.2rem;
  margin-top: 0.6em;
}

h3 {
  font-size: 1.35rem;
  margin-top: 1.5em;
}

h4 {
  font-size: 1rem;
  font-weight: 500;
}

marquee {
  font-size: 1.08rem;
  color: #2471a3;
  background: #f5f5f7;
  border-radius: 1em;
  padding: 6px 0;
  margin-bottom: 0.9em;
}

p {
  margin-bottom: 0.6em;
  font-size: 1.06rem;
}

audio {
  margin: 1.5em 0;
  width: 100%;
}

/* Imágenes */
img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.2em auto;
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(20,40,80,0.07);
}

/* PDFs y iframes */
iframe {
  display: block;
  width: 100% !important;
  min-height: 420px;
  max-height: 60vh;
  margin: 1.5em 0;
  border-radius: 14px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.09);
  background: #f7fafd;
  border: none !important;
}

/* Tablas */
table {
  width: 100%;
  margin: 2em 0;
  border-collapse: collapse;
  background: #fafdff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 1px 10px rgba(60,80,120,0.07);
}

th, td {
  padding: 0.75em 0.6em;
  text-align: left;
  font-size: 1rem;
}

th {
  background: #f0f3f6;
  font-weight: 600;
  color: #1a2636;
}

tr {
  border-bottom: 1px solid #eef1f3;
}

tr:last-child {
  border-bottom: none;
}

td {
  color: #212931;
}

tfoot td {
  background: #fff;
  border-top: 2px solid #e0e6ec;
}

/* Listas */
ul, ol {
  margin-bottom: 1.1em;
  margin-left: 1.4em;
}

li {
  margin-bottom: 0.5em;
}

/* Responsive */
@media (max-width: 750px) {
  body {
    padding: 16px 2vw 32px 2vw;
  }
  h1 {
    font-size: 1.5rem;
  }
  h3 {
    font-size: 1.1rem;
  }
  iframe, img {
    max-height: 35vh;
  }
  table, th, td {
    font-size: 0.92rem;
    padding: 0.55em 0.3em;
  }
}

/* Mejorar botones de audio y video */
audio::-webkit-media-controls-panel {
  background-color: #f7fafd;
  border-radius: 10px;
}

audio::-webkit-media-controls-play-button,
audio::-webkit-media-controls-volume-slider {
  filter: invert(40%);
}

/* Quitar subrayados de enlaces dentro de iframes por si acaso */
iframe a {
  text-decoration: none;
  color: #2980b9;
}

/* Mejorar scrollbar */
::-webkit-scrollbar {
  width: 8px;
  background: #f3f5fa;
}
::-webkit-scrollbar-thumb {
  background: #e6e8ed;
  border-radius: 8px;
}

/* Espacio entre secciones (solo visual, sin tocar html) */
h3, h4 {
  margin-top: 2.3em;
  margin-bottom: 1em;
}

hr {
  border: none;
  border-top: 1px solid #ecf0f1;
  margin: 2.5em 0;
}