.big-box {
  border: 1px solid #eee;
  -webkit-box-shadow: 0 3px 3px rgba(0,0,0,.5);
  box-shadow: 0 3px 3px rgba(0,0,0,.5);
  padding: 20px;
  margin-top: 60px;
  margin-bottom: 60px;

/*
  -webkit-box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
     -moz-box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
          box-shadow:0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
*/
}




.custom-container {
    background-color: #000000;  
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.socialaccount_providers li a.socialaccount_provider {
  rem-border: 1px solid #ddd;
  border-radius: 10px;
  rem-box-shadow: 2px 2px 8px rgba(0,0,0,.7);
  -padding: 10px;
  margin-bottom: 6px;
  display: block;
  width: 100%;
  overflow: hidden;
  rem-font-size: 1.2em;
}

.socialaccount_providers li a.socialaccount_provider:hover {
  text-decoration: none;
  box-shadow: 1px 1px 2px rgba(0,0,0,.7);
}

.socialaccount_providers li a.socialaccount_provider.facebook {
  background: #4B67A3; /* technically gradient down to #3A579A */
  color: #fff;
}
.socialaccount_providers li a.socialaccount_provider.facebook:before {
  font-family: FontAwesome;
  font-size: 1.9em;
  content: "\f082";
  display: inline-block;
  padding-left: 8px;
  padding-right: 8px;
}

.socialaccount_providers li a.socialaccount_provider.google {
  background: #DE4931;
  color: #fff;
}
.socialaccount_providers li a.socialaccount_provider.google:before {
  font-family: FontAwesome;
  font-size: 1.9em;
  content: "\f1a0";
  display: inline-block;
  padding-left: 8px;
  padding-right: 8px;
}


/* from http://konigi.com/tools/css-sticky-notes */
.sticky {
  -webkit-box-shadow: #DDD 0px 1px 2px;
  position: relative;
  background-color: #F4F39E;
  border-color: #DEE184;
  text-align: center;
  margin: 2.5em 0px;
  padding: 1.5em 1em;
  -webkit-box-shadow: 0px 1px 3px rgba(0,0,0,0.25);
  -moz-box-shadow: 0px 1px 3px rgba(0,0,0,0.25);
  box-shadow: 0px 1px 3px rgba(0,0,0,0.25);
  font-family: Chalkboard, 'Comic Sans';
}
.sticky.taped2:after {
  display: block;
  content: "";
  position: absolute; 
  width: 110px;
  height: 30px;
  top: -21px;
  left: 30%;    
  border: 1px solid #fff;
  background: rgba(254, 254, 254, .6);
  -webkit-box-shadow: 0px 0 3px rgba(0,0,0,0.1);
  -moz-box-shadow: 0px 0 3px rgba(0,0,0,0.1);
  box-shadow: 0px 0 3px rgba(0,0,0,0.1);  
}

/* borrowed from http://designshack.net/articles/css/4-fun-css-image-effects-you-can-copy-and-paste/ */
.picture-frame img {
  border: 10px solid #fff;
  -webkit-box-shadow: 3px 0px 0px #777;
  -moz-box-shadow: 3px 0px 0px #777;
  box-shadow: 0px 0px 5px rgba(0,0,0,0.35);
}





.btn-pink {
  background-color: #e91e63;   /* hồng đậm */
  color: #fff;                 /* chữ trắng */
  border: none;
  padding: 12px 24px;
  font-size: 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.2s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.btn-pink:hover {
  background-color: #d81b60;   /* hồng tối hơn khi hover */
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.25);
}

.container-footer {
  width: 100%;
  padding: 20px 0;
  text-align: center;
  background-color: rgba(0, 0, 0, 0.6); /* nền đen mờ */
  color: #fff;
  position: relative;  /* mặc định */
  margin-top: auto;    /* đẩy xuống dưới khi dùng flex layout */
}

.custom-navbar {
  width: 100%;
  padding: 20px 40px;
  background-color: rgba(102, 0, 204, 0.2); /* tím nhạt hơn, trong suốt hơn */
  color: #fff;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.navbar-brand {
  font-size: 28px;         /* tăng size chữ */
  font-weight: bold;
  color: #fff;
}

.navbar-links a {
  margin-left: 30px;
  text-decoration: none;
  color: #fff;
  font-size: 20px;         /* chữ to hơn */
  font-weight: 600;
  transition: color 0.3s ease;
}

.navbar-links a:hover {
  color: #ffb3ec;
}

.floating-logo {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 1000;
  display: block;
}

.floating-logo img {
  height: 200px;       /* điều chỉnh kích thước phù hợp */
  width: auto;
  opacity: 0.85;
  transition: opacity 0.3s ease;
}

.floating-logo img:hover {
  opacity: 1;
  cursor: pointer;
}


html, body, .wrapper {
  height: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
}

.container1234 {
  flex: 1 0 auto;           /* Chiếm hết khoảng trống còn lại */
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 40px;
  color: #ffe6f0;  /* hồng rất sáng ngả tím */
  font-size: 2rem; /* tăng cỡ chữ tại đây */
}


html, body, .wrapper {
  height: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
}
.container1236 {
  flex: 1 0 auto;           /* Chiếm hết khoảng trống còn lại */
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 40px;
  color: #ffe6f0;  /* hồng rất sáng ngả tím */
  font-size: 2rem; /* tăng cỡ chữ tại đây */
}


.container1235 {
  background-color: transparent;
  color: #ffe6f0;  /* hồng rất sáng ngả tím */
  text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.6); /* Bóng tối xung quanh chữ */
  padding: 20px;
  margin-top: 60px;
  margin-bottom: 30px;
  text-align: center;
  font-size: 1.7rem;
}

.container1235 ul {
  list-style-position: inside;   /* keeps bullets inside */
  padding-left: 0;               /* removes default indent */
  display: inline-block;         /* allows centering */
  text-align: left;              /* keeps text aligned inside items */
}

.container1235 li {
  margin-bottom: 10px;
}

.container1235 .mt-3 {
  margin-top: 1rem;
}

.container1235:hover {
  background-color: rgba(0, 0, 0, 0.5); /* đen mờ khi hover */
}

.container1237 {
  background-color: transparent;
  color: #ffe6f0;  /* hồng rất sáng ngả tím */
  text-shadow: 1px 1px 6px rgba(0, 0, 0, 0.6); /* Bóng tối xung quanh chữ */
  padding: 20px;
  margin-top: 60px;
  margin-bottom: 30px;
  font-size: 2rem; /* tăng cỡ chữ tại đây */
  max-height: 800px;    /* hoặc dùng height: 400px */
  overflow-y: auto;
}

.container1237:hover {
  background-color: rgba(0, 0, 0, 0.5); /* đen mờ khi hover */
}