.page-header {
  position: relative;
  top: 0;
  left: 0;
  height: 100px;
  background-image: url("../img/site/abstract.webp");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  width: 100%;
}


/*---------- FEATURES.html ----------*/
.bg-primary {
  background-color: var(--primary);
}

#technique {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-evenly;
  padding: 0 5rem 3rem 5rem;
}
.technique-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 2rem;
}

.technique-heading {
  margin-bottom: 2rem;
  text-align: center;
  font-size: calc(1.425rem + 2.1vw);
  font-weight: 300;
  line-height: 1.2;
}

.quote {
  margin: 2em 1em;
  font-family: var(--serif);
  font-size: 0.95rem;
  font-weight: 400;
  font-style: oblique;
}

.advice {
  border-radius: 15px;
  border: 1px solid var(--grey-400);
  padding: 3rem;
}

.vbar {
  margin: 0.5rem;
  padding-right: 0.5rem;
  border-right: 5px solid rgba(4, 89, 129, 0.4);
}

.bio-img {
  margin: 5rem 0;
  text-align: center;
}

.tech-card {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  width: var(--tech-card-width);
  max-width: var(--tech-card-width);
  padding: 15px;
  border-radius: 0.75rem;
  -webkit-box-shadow: 4px 4px 8px 0px rgba(0, 0, 0, 0.4);
  -moz-box-shadow: 4px 4px 8px 0px rgba(0, 0, 0, 0.4);
  box-shadow: 4px 4px 8px 0px rgba(0, 0, 0, 0.4);
  border: 10px solid var(gray-300);
}

.tech-card-header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  background-color: var(--grey-100);
  color: var(--dark);
  height: 60px;
  border-radius: 8px;
}

.card-heading {
  font-size: 0.95rem;
  font-weight: 700;
}

.tech-card-body {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
}

.tech-card-footer {
  padding: 1rem;
  border-top: 2px solid var(--grey-400);
  font-size: 0.75rem;
  color: var(--black);
}

.tech-card-text {
  margin-top: 3rem;
  font-size: 1.25em;
  margin: 2em 1em 0 1em;
}

#card1 .tech-card-footer,
#card9 .tech-card-footer,
#card17 .tech-card-footer {
  border: none;
}


/*-- MEDIA QUERIES --*/

@media only screen and (min-width: 300px) {

  #technique {
    padding: 1rem;
  }
 .container,
  .bordered-panel {
    margin: 2px;
  }

  .tech-card {
    --tech-card-width: 100%;
    margin: 0.5rem;
}
}

@media only screen and (min-width: 632px) {  
 .container,
  .bordered-panel {
    margin: 12px;
  }

  .tech-card {
    --tech-card-width: 280px;
    margin: 0.5rem;
}
}

@media only screen and (min-width: 690px) {
  #features {display: none;}
}

@media only screen and (max-width: 701px) {
  .quickNav-bar {display: none;}
  #features {display: flex;}
}