body {
  font-size: 17px;
  line-height: 1.4705882353;
  font-weight: 400;
  letter-spacing: -0.022em;
  font-family: Helvetica, Arial, sans-serif;
  font-style: normal;
  background-color: #111111;
  color: #e9ecef;
}


/* Updated navigation styles */
.navigation_bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1050;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

/* Scroll effect */
.navigation_bar.scrolled {
  background: rgba(17, 17, 17, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

/* Body padding adjustment */
body {
  padding-top: 70px;
}

/* Hero section adjustment for index.html */
#index_hero {
  margin-top: -70px;
  padding-top: 70px;
}


/* nav-bar */
.navigation_bar .nav-tabs {
  border-bottom: none;
  background: transparent;
  z-index: 9999;
}

#NavRightButton {
  margin-left: auto;
  margin-right: 16px;
  margin-bottom: auto;
}

.navigation_bar .nav-tabs .nav-link {
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.1);
  color: #888888;
  margin-right: 3px;
  border-radius: 8px 8px 0 0;
  transition: all 0.3s ease;
  font-weight: 500;
  padding: 12px 20px;
}

/* hovering */
.navigation_bar .nav-tabs .nav-link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Active -nav bar - dark */
.navigation_bar .nav-tabs .nav-link.active {
  background: linear-gradient(135deg, #ff3535 0%, #ff8c42 100%);
  color: #ffffff !important;
  border-color: #ff6b35;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
  transform: translateY(-2px);
}

/* Active decoration line*/
.navigation_bar .nav-tabs .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #ffd700, #ffed4a);
  border-radius: 0 0 4px 4px;
}

#settings {
  background-image: url(../images/gear.png);
  display: inline-block;
  width: 32px;
  height: 32px;
  background-size: cover;
  background-repeat: no-repeat;
  margin-right: 10px;
}

body.light-mode #settings {
  filter: invert(1) brightness(0.8);
}

/* light-mode navigation bar */
body.light-mode .navigation_bar .nav-tabs .nav-link {
  background: rgba(0, 0, 0, 0.05);
  color: #666666;
}

body.light-mode .navigation_bar .nav-tabs .nav-link:hover {
  background: rgba(0, 0, 0, 0.1);
  color: #333333;
}

/* nav bar light mode */
body.light-mode .navigation_bar .nav-tabs .nav-link.active {
  background: linear-gradient(135deg, #fea862 0%, #fa226a 100%);
  color: #ffffff !important;
  border-color: #f9f57b;
  box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

body.light-mode .navigation_bar .nav-tabs .nav-link.active::after {
  background: linear-gradient(90deg, #f88741, #fbac36);
}

/* drop-down */
.navigation_bar .dropdown-menu {
  background: rgba(37, 37, 37, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
}

.navigation_bar .dropdown-item {
  color: #ffffff;
  transition: all 0.3s ease;
}

.navigation_bar .dropdown-item:hover {
  background: rgba(255, 107, 53, 0.2);
  color: #ff6b35;
  font-weight: bolder;
}

body.light-mode .navigation_bar .dropdown-menu {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

body.light-mode .navigation_bar .dropdown-item {
  color: #333333;
}

body.light-mode .navigation_bar .dropdown-item:hover {
  background: rgba(255, 166, 0, 0.728);
  color: #000000;
  font-weight: bolder;
}

/* media-query */
@media (max-width: 768px) {
  .navigation_bar .nav-tabs .nav-link {
    padding: 8px 12px;
    font-size: 12px;
    margin-right: 2px;
  }

  .navigation_bar .nav-tabs .nav-link.active {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);
  }
}

/* animations */
@keyframes activeGlow {
  0% {
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
  }

  50% {
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.6);
  }

  100% {
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
  }
}

.navigation_bar .nav-tabs .nav-link.active {
  animation: activeGlow 2s ease-in-out infinite;
}


body.light-mode {
  background-color: #ffffff;
  color: #1e1e1e;
}

body.light-mode section {
  background-color: #f8f9fa;
  color: #1e1e1e;
}

body.light-mode #info_part1,
body.light-mode #info_part2 {
  background-color: #ffffff;
  color: #1e1e1e;
}

body.light-mode #info_part1 p,
body.light-mode #things_info_part2 p {
  color: #666666;
}

body.light-mode strong {
  color: #000000;
}

body.light-mode footer {
  background: rgb(205, 205, 205);
  color: rgb(59, 59, 59);
}

body.light-mode .social-media-links i {
  filter: invert(1) brightness(0.8);
  /* become dark-grey*/
}


body.light-mode .footer-links a {
  color: #333333;
}

body.light-mode .footer-links a:visited {
  color: #333333;
}

body.light-mode .rights {
  color: #333333;
}

body.light-mode .offcanvas-header {
  background-color: #f8f9fa;
  color: #333333;
}

body.light-mode .offcanvas-body {
  background: #ffffff;
  color: #333333;
}

body.light-mode .offcanvas-title {
  color: #dc3545;
}

.nav-item {
  margin-top: 16px;
}

.offcanvas-header {
  background-color: #888888;
  color: aliceblue;
}

.offcanvas-title {
  font-size: 0.8em;
  font-weight: 680;
  letter-spacing: 0.03vw;
  font-family: Figtree;
  color: rgb(104, 0, 0);
}

.offcanvas-body {
  background: #252525;
}

footer {
  padding: 50px;
  display: flex;
  flex-direction: column;
  background: rgb(37, 37, 37);
  color: aliceblue;
}

.footer_main {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
}

.social-media-links {
  display: flex;
  flex-direction: row;
  list-style-type: none;
  gap: 50px;
  padding-left: 0px;
}

.footer-links {
  display: flex;
  flex-direction: row;
  list-style-type: none;
  gap: 3vw;
  padding-left: 20px;
  padding-top: 5px;
}

#icon-tiktok {
  background: url(../images/tiktok.png);
  /* https://www.flaticon.com/ */
  color: white;
  display: inline-block;
  width: 32px;
  height: 32px;
  background-size: cover;
  background-repeat: no-repeat;
  margin-right: 10px;
}

#icon-linkedin {
  background: url(../images/linkedin.png);
  /* https://www.flaticon.com/ */
  display: inline-block;
  width: 32px;
  height: 32px;
  background-size: cover;
  background-repeat: no-repeat;
  margin-right: 10px;
}

#icon-instagram {
  background: url(../images/instagram.png);
  /* https://www.flaticon.com/ */
  display: inline-block;
  width: 32px;
  height: 32px;
  background-size: cover;
  background-repeat: no-repeat;
  margin-right: 10px;
}

#icon-facebook {
  background: url(../images/facebook.png);
  /* https://www.flaticon.com/ */
  display: inline-block;
  width: 32px;
  height: 32px;
  background-size: cover;
  background-repeat: no-repeat;
  margin-right: 10px;
}

#personal_contact_info {
  display: flex;
  flex-direction: row;
  gap: 30px;
  margin-left: 50px;
  padding-top: 5px;
}

.footer-links a {
  color: aliceblue;
}

.footer-links a:visited {
  color: aliceblue
}

.rights {
  color: white;
  font-family: Figtree, sans-serif;
  text-align: center;
  margin-top: 40px;
}

#SP_logo {
  display: inline-block;
  width: 40px;
  height: 40px;
  background-size: cover;
  background-repeat: no-repeat;
  margin-right: 10px;
}

@media (max-width: 1024px) {
  footer {
    padding-bottom: 5%;
    overflow: hidden;
  }

  .footer_main {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
  }

  .social-media-links {
    display: flex;
    flex-direction: row;
    list-style-type: none;
    justify-content: space-around;
  }

  .footer-links {
    display: flex;
    flex-direction: row;
    list-style-type: none;
    padding: 0;
    margin-top: 5%;
    justify-content: space-between;
  }

  #personal_contact_info {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-left: 0;
    text-align: center;
    padding-top: 5%;
  }

  #personal_contact_info p {
    margin-bottom: 0 !important;
  }

}