body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  background-color: #0f2a23;
  color: #f3f3f3;
}

/* CABECERA */
.hero {
  text-align: center;
  padding: 50px 20px 35px;
  background: linear-gradient(180deg, #1c463b, #0f2a23);
}

.hero h1 {
  font-size: 2.2em;
  margin-bottom: 10px;
}

.hero p {
  font-size: 1em;
  opacity: 0.85;
}

/* INDICADOR SCROLL */
.scroll-indicator {
  text-align: center;
  font-size: 0.8em;
  opacity: 0.7;
  margin-bottom: 20px;
}

/* CONTENEDOR */
.container {
  max-width: 520px;
  margin: auto;
  padding: 0 20px 40px;
}

/* BLOQUES */
.block {
  text-align: center;
}

/* CERTIFICADO */
.premium {
  position: relative;
  background: rgba(255,255,255,0.03);
  padding: 28px 24px 30px;
  border-radius: 22px;
  border: 1px solid rgba(201,162,77,0.25);
  box-shadow: 0 20px 45px rgba(0,0,0,0.45);
}

/* SELLO */
.premium::after {
  content: "CERTIFICADO DIGITAL";
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.6em;
  letter-spacing: 1px;
  padding: 6px 12px;
  border-radius: 14px;
  color: #c9a24d;
  border: 1px solid rgba(201,162,77,0.45);
  background: rgba(15,42,35,0.9);
}

/* ETIQUETA */
.tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 16px;
  font-size: 0.7em;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  border-radius: 20px;
  background-color: rgba(201,162,77,0.15);
  color: #c9a24d;
  font-weight: bold;
}

/* TEXTO */
.block h2 {
  font-size: 1.35em;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 0.85em;
  opacity: 0.8;
  margin-bottom: 18px;
}

/* IMÁGENES CERTIFICADO */
.certificate-img {
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  margin: 18px 0 20px;
  padding: 8px;
  background: #111;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 18px 35px rgba(0,0,0,0.5);
}

/* BOTONES */
.button {
  display: inline-block;
  margin-top: 10px;
  padding: 13px 26px;
  background-color: #c9a24d;
  color: #0f2a23;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
  font-size: 0.9em;
}

/* META */
.meta {
  margin-top: 14px;
  font-size: 0.7em;
  opacity: 0.6;
}

/* DIVISOR */
.divider {
  height: 40px;
}

/* PIE */
footer {
  text-align: center;
  padding: 30px 20px;
  font-size: 0.75em;
  opacity: 0.6;
}