body {
  font-family: "Open Sans", sans-serif;
}

form {
  max-width: 500px;
  margin: 0 auto;
}

button {
  color: #777;
  background: #fff;
  padding: 4px 12px 4px 12px;
  border: solid #777 2px;
  transition: all 0.3s ease-in-out;
  text-decoration: none;
}

button:hover {
  color: #000;
  border: solid #000 2px;
  text-decoration: none;
}

input,
textarea {
  font-size: 0.8rem;
  border: 1px solid #ddd;
  background: #fff;
  padding: 0.5rem 0.7rem;
  margin: 5px 0;
  transition: all 0.3s ease-in-out;
  width: 100%;
}

input:focus,
textarea:focus {
  border-color: #777;
  outline: none;
}

.portfolio-content {
  line-height: 2;
  color: #555;
}

.portfolio-content a {
  color: #333;
  text-decoration: none;
  border-bottom: 1px solid #bbb;
}

.portfolio-content a:hover {
  color: #000;
  text-decoration: none;
  border-bottom: 1px solid #555;
}

h1,
h2,
h3 {
  font-family: "Crimson Text", sans-serif;
  letter-spacing: 1px;
  font-weight: 300;
  margin-bottom: 20px;
}

.navbar-brand {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.5px;
}

.navbar {
  text-transform: uppercase;
}

.nav-item {
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 1.5px;
}

.navbar-toggler {
  border: 0;
}

.navbar-toggler-right {
  right: 0rem;
}

.portfolio-img {
  width: 100%;
  /* max-height: 250px; */
  display: block;
  object-fit: cover;
  top: 50%;
  transform: translate(0px, -50%);
}

.project-img {
  width: 100%;
  display: block;
  object-fit: cover;
  max-height: 20vh;
  opacity: 0.5;
  transition: opacity 0.5s ease;
}
.project-img:hover{
  opacity: 0.9;
}

/* Image Hover Effect */

.hovereffect {
  width: 100%;
  height: 100%;
  float: left;
  overflow: hidden;
  position: relative;
  text-align: center;
}

.hovereffect .overlay {
  width: 100%;
  height: 100%;
  position: absolute;
  overflow: hidden;
  top: 0;
  left: 0;
}

.hovereffect .overlay-text {
  font-size: 1.3rem;
  font-family: "Crimson Text", sans-serif;
  font-weight: 300;
  color: #000;
  left: 50%;
  position: absolute;
  top: 50%;
  width: 100%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  opacity: 0;
  filter: alpha(opacity=0);
  -webkit-transition: opacity 0.35s, -webkit-transform 0.35s;
  transition: opacity 0.35s, transform 0.35s;
  margin: 0;
}

.hovereffect:hover .overlay-text {
  opacity: 1;
  filter: alpha(opacity=100);
}

.hovereffect img {
  display: block;
  position: relative;
  max-width: none;
  width: 100%;
  height: 100%;
  -webkit-transition: opacity 0.35s, -webkit-transform 0.35s;
  transition: opacity 0.35s, transform 0.35s;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  position: absolute;
}

.hovereffect:hover img {
  opacity: 0;
  filter: alpha(opacity=0);
}

.hovereffect span.img{
    /* 把方块撑成囗形 */
    opacity: 1;
    content: "";
    padding-top: 50%;
    transform: scale(1);
    /* vertical-align: middle; */
    display: block;
    
    display: block;width: 100%;height: 100%;
    background-size: cover;
    background-position:center;
    transition: opacity 0.35s, transform 0.35s;
    margin: 0!important;
}
@media screen and (max-width: 900px)  {
  .hovereffect span.img{
    padding-top: 100%;
  }
}
@media screen and (max-width: 750px)  {
  .hovereffect span.img{
    padding-top: 125%;
  }
}

.hovereffect:hover span.img{
  opacity: 0!important;
  filter: alpha(opacity=0)!important;
}

#detail_date,#detail_edit{
  opacity: 0.5;
  transition: opacity 0.5s ease;
}
#detail_date:hover,#detail_edit:hover{
  opacity: 0.8;
}

.page-nav {
  width: 50%;
  margin: 0 auto;
  text-align: center;
}
.page-nav a,
span {
  font-size: 1.3rem;
  font-family: "Crimson Text", sans-serif;
  font-weight: 300;
  margin: 0 10px;
  color: #000;
}
a:hover {
  text-decoration: none;
}
.sticky_top_40 {
  position: -webkit-sticky;
  position: sticky;
  top: 40px;
}

.container-fluid p > img {
  max-width: 100%;
}