/**
* Template Name: Active
* Template URL: https://bootstrapmade.com/active-bootstrap-website-template/
* Updated: Aug 07 2024 with Bootstrap v5.3.3
* Author: BootstrapMade.com
* License: https://bootstrapmade.com/license/
*/

/*--------------------------------------------------------------
# Font & Color Variables
# Help: https://bootstrapmade.com/color-system/
--------------------------------------------------------------*/
/* Fonts */
:root {
  --default-font: "Roboto", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --heading-font: "Roboto", sans-serif;
  --nav-font: "Lato", sans-serif;
}

/* Global Colors - The following color variables are used throughout the website. Updating them here will change the color scheme of the entire website */
:root {
  --background-color: #ffffff;
  /* Background color for the entire website, including individual sections */
  --default-color: #212529;
  /* Default color used for the majority of the text content across the entire website */
  --heading-color: #000000;
  /* Color for headings, subheadings and title throughout the website */
  --accent-color: #276a94;
  /* Accent color that represents your brand on the website. It's used for buttons, links, and other elements that need to stand out */
  --surface-color: #ffffff;
  /* The surface color is used as a background of boxed elements within sections, such as cards, icon boxes, or other elements that require a visual separation from the global background. */
  --contrast-color: #ffffff;
  /* Contrast color for text, ensuring readability against backgrounds of accent, heading, or default colors. */
}

/* Nav Menu Colors - The following color variables are used specifically for the navigation menu. They are separate from the global colors to allow for more customization options */
:root {
  --nav-color: #212529;
  /* The default color of the main navmenu links */
  --nav-hover-color: #212529;
  /* Applied to main navmenu links when they are hovered over or active */
  --nav-mobile-background-color: #ffffff;
  /* Used as the background color for mobile navigation menu */
}

/* Smooth scroll */
:root {
  scroll-behavior: smooth;
}

/*--------------------------------------------------------------
# General Styling & Shared Classes
--------------------------------------------------------------*/
body {
  color: var(--default-color);
  background-color: var(--background-color);
  font-family: var(--default-font);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: 0.3s;
}

a:hover {
  color: color-mix(in srgb, var(--accent-color), transparent 20%);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--heading-color);
  font-family: var(--heading-font);
}

/*--------------------------------------------------------------
# Global Header
--------------------------------------------------------------*/
.header {
  color: var(--default-color);
  background-color: var(--background-color);
  padding: 10px 0;
  transition: all 0.5s;
  z-index: 997;
}

.header .logo {
  line-height: 1;
}

.header .logo img {
  max-height: 50px;
}

.header .logo h1 {
  font-size: 30px;
  margin: 0;
  font-weight: 300;
  color: var(--heading-color);
}

.scrolled .header {
  box-shadow: 0px 0 18px rgba(0, 0, 0, 0.1);
}

/*--------------------------------------------------------------
# Navigation Menu
--------------------------------------------------------------*/
/* Navmenu - Desktop */
@media (min-width: 1200px) {
  .navmenu {
    padding: 0;
  }

  .navmenu ul {
    margin: 0;
    padding: 0;
    display: flex;
    list-style: none;
    align-items: center;
  }

  .navmenu li {
    position: relative;
  }

  .navmenu a,
  .navmenu a:focus {
    color: var(--nav-color);
    padding: 18px 15px;
    font-size: 16px;
    font-family: var(--nav-font);
    font-weight: 400;
    display: flex;
    align-items: center;
    justify-content: space-between;
    white-space: nowrap;
    transition: 0.3s;
  }

  .navmenu li:last-child a {
    padding-right: 0;
  }

  .navmenu li:hover>a,
  .navmenu .active,
  .navmenu .active:focus {
    color: var(--nav-hover-color);
  }
}

/* Navmenu - Mobile */
@media (max-width: 1199px) {
  .mobile-nav-toggle {
    color: var(--nav-color);
    font-size: 28px;
    line-height: 0;
    margin-right: 10px;
    cursor: pointer;
    transition: color 0.3s;
  }

  .navmenu {
    padding: 0;
    z-index: 9997;
  }

  .navmenu ul {
    display: none;
    list-style: none;
    position: absolute;
    inset: 60px 20px 20px 20px;
    padding: 10px 0;
    margin: 0;
    border-radius: 6px;
    background-color: var(--nav-mobile-background-color);
    overflow-y: auto;
    transition: 0.3s;
    z-index: 9998;
    box-shadow: 0px 0px 30px rgba(0, 0, 0, 0.1);
  }

  .navmenu a,
  .navmenu a:focus {
    color: var(--nav-color);
    padding: 10px 20px;
    font-family: var(--nav-font);
    font-size: 17px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    white-space: nowrap;
    transition: 0.3s;
  }

  .navmenu a:hover,
  .navmenu .active,
  .navmenu .active:focus {
    color: var(--nav-hover-color);
  }

  .mobile-nav-active {
    overflow: hidden;
  }

  .mobile-nav-active .mobile-nav-toggle {
    color: #fff;
    position: absolute;
    font-size: 32px;
    top: 15px;
    right: 15px;
    margin-right: 0;
    z-index: 9999;
  }

  .mobile-nav-active .navmenu {
    position: fixed;
    overflow: hidden;
    inset: 0;
    background: rgba(33, 37, 41, 0.8);
    transition: 0.3s;
  }

  .mobile-nav-active .navmenu>ul {
    display: block;
  }
}

/*--------------------------------------------------------------
# Global Footer
--------------------------------------------------------------*/
.footer {
  color: var(--default-color);
  background-color: var(--background-color);
  font-size: 14px;
  padding: 40px 0;
  position: relative;
}

.footer .copyright p {
  margin-bottom: 0;
}

.social-links {
  margin-top: 20px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--heading-color), transparent 50%);
  font-size: 20px;
  color: color-mix(in srgb, var(--heading-color), transparent 50%);
  margin: 0 5px;
  transition: 0.3s;
}

.social-links a:hover {
  color: var(--default-color);
  border-color: var(--default-color);
}

.footer .credits {
  margin-top: 10px;
  font-size: 13px;
  text-align: center;
}

/*--------------------------------------------------------------
# Preloader
--------------------------------------------------------------*/
#preloader {
  position: fixed;
  inset: 0;
  z-index: 999999;
  overflow: hidden;
  background: var(--background-color);
  transition: all 0.6s ease-out;
}

#preloader:before {
  content: "";
  position: fixed;
  top: calc(50% - 30px);
  left: calc(50% - 30px);
  border: 6px solid #ffffff;
  border-color: var(--default-color) transparent var(--default-color) transparent;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: animate-preloader 1.5s linear infinite;
}

@keyframes animate-preloader {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/*--------------------------------------------------------------
# Scroll Top Button
--------------------------------------------------------------*/
.scroll-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 99999;
  background-color: var(--accent-color);
  width: 40px;
  height: 40px;
  border-radius: 4px;
  transition: all 0.4s;
}

.scroll-top i {
  font-size: 24px;
  color: var(--contrast-color);
  line-height: 0;
}

.scroll-top:hover {
  background-color: color-mix(in srgb, var(--accent-color), transparent 20%);
  color: var(--contrast-color);
}

.scroll-top.active {
  visibility: visible;
  opacity: 1;
}

/*--------------------------------------------------------------
# Disable aos animation delay on mobile devices
--------------------------------------------------------------*/
@media screen and (max-width: 768px) {
  [data-aos-delay] {
    transition-delay: 0 !important;
  }
}

/*--------------------------------------------------------------
# Global Sections
--------------------------------------------------------------*/
section,
.section {
  color: var(--default-color);
  background-color: var(--background-color);
  padding: 15px 0;
  scroll-margin-top: 100px;
  overflow: clip;
}

@media (max-width: 1199px) {

  section,
  .section {
    scroll-margin-top: 66px;
  }
}

/*--------------------------------------------------------------
# Global Section Titles
--------------------------------------------------------------*/
.section-title {
  text-align: center;
  padding-bottom: 60px;
  position: relative;
}

.section-title h2 {
  font-size: 28px;
  font-weight: 500;
  margin-bottom: 0;
}

/*--------------------------------------------------------------
# About 2 Section
--------------------------------------------------------------*/
.about-2 .content {
  background-color: var(--surface-color);
  padding-top: 50px;
  padding-bottom: 50px;
}

.about-2 .img-wrap .img img {
  max-width: 400px;
  width: 100%;
  height: auto;
  border-radius: 30px;
}

.about-2 .content-subtitle {
  font-size: 15px;
  margin-bottom: 10px;
  display: block;
  color: var(--default-color);
}

.content-title {
  margin-bottom: 20px;
}

.about-2 .content-title {
  color: var(--heading-color);
  font-size: 22px;
  margin-bottom: 30px;
}

.about-2 p {
  line-height: 1.7;
  color: var(--default-color);
}

.about-2 .btn-get-started {
  background-color: var(--accent-color);
  color: var(--contrast-color);
  border-radius: 30px;
  padding: 8px 30px;
  border: 2px solid transparent;
  transition: 0.3s all ease-in-out;
  font-size: 14px;
}

.about-2 .btn-get-started:hover {
  border-color: var(--accent-color);
  background-color: transparent;
  color: var(--accent-color);
}

.about-2 .lead {
  line-height: 1.6;
  font-size: 18px;
  font-weight: normal;
  color: var(--default-color);
}

/*--------------------------------------------------------------
# Portfolio Section
--------------------------------------------------------------*/
.portfolio .portfolio-filters-container {
  margin-bottom: 40px;
}

.portfolio .portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  padding: 0;
  margin: 0;
  list-style: none;
}

.portfolio .portfolio-filters li {
  font-size: 15px;
  font-weight: 500;
  padding: 8px 20px;
  cursor: pointer;
  border-radius: 30px;
  background-color: color-mix(in srgb, var(--surface-color), transparent 50%);
  color: var(--default-color);
  transition: all 0.3s ease-in-out;
}

.portfolio .portfolio-filters li:hover {
  background-color: color-mix(in srgb, var(--default-color), transparent 85%);
  color: var(--default-color);
  transform: translateY(-2px);
}

.portfolio .portfolio-filters li.filter-active {
  background-color: var(--default-color);
  color: var(--contrast-color);
}

.portfolio .portfolio-card {
  background-color: var(--surface-color);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 5px 25px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease-in-out;
}

.portfolio .portfolio-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 35px rgba(0, 0, 0, 0.1);
}

.portfolio .portfolio-card:hover .portfolio-overlay {
  opacity: 1;
  visibility: visible;
}

.portfolio .portfolio-card:hover .portfolio-overlay .portfolio-actions {
  transform: translateY(0);
}

.portfolio .portfolio-card .portfolio-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.portfolio .portfolio-card .portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease-in-out;
}

.portfolio .portfolio-card .portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease-in-out;
  display: flex;
  align-items: flex-end;
  padding: 20px;
}

.portfolio .portfolio-card .portfolio-overlay .portfolio-actions {
  transform: translateY(20px);
  transition: all 0.4s ease-in-out;
  display: flex;
  gap: 15px;
}

.portfolio .portfolio-card .portfolio-overlay .portfolio-actions a {
  width: 45px;
  height: 45px;
  background-color: var(--surface-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--default-color);
  font-size: 20px;
  transition: all 0.3s ease;
}

.portfolio .portfolio-card .portfolio-overlay .portfolio-actions a:hover {
  background-color: var(--default-color);
  color: var(--contrast-color);
  transform: scale(1.1);
}

.portfolio .portfolio-card .portfolio-content {
  padding: 25px;
}

.portfolio .portfolio-card .portfolio-content .category {
  font-size: 14px;
  color: var(--default-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
  display: block;
  margin-bottom: 10px;
}

.portfolio .portfolio-card .portfolio-content h3 {
  font-size: 20px;
  margin: 0 0 15px;
  font-weight: 600;
  transition: color 0.3s ease;
}

.portfolio .portfolio-card .portfolio-content h3:hover {
  color: var(--default-color);
}

.portfolio .portfolio-card .portfolio-content p {
  font-size: 15px;
  color: color-mix(in srgb, var(--default-color), transparent 30%);
  margin: 0;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .portfolio .portfolio-filters li {
    font-size: 14px;
    padding: 6px 15px;
  }

  .portfolio .portfolio-card .portfolio-content {
    padding: 20px;
  }

  .portfolio .portfolio-card .portfolio-content h3 {
    font-size: 18px;
  }

  .portfolio .portfolio-card .portfolio-content p {
    font-size: 14px;
  }
}

/*--------------------------------------------------------------
# Portfolio Details Section
--------------------------------------------------------------*/
.portfolio-details .portfolio-details-slider img {
  width: 50%;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.portfolio-details .swiper-wrapper {
  height: auto;
}

.portfolio-details .swiper-button-prev,
.portfolio-details .swiper-button-next {
  width: 48px;
  height: 48px;
}

.portfolio-details .swiper-button-prev:after,
.portfolio-details .swiper-button-next:after {
  color: rgba(255, 255, 255, 0.8);
  background-color: rgba(0, 0, 0, 0.15);
  font-size: 24px;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
}

.portfolio-details .swiper-button-prev:hover:after,
.portfolio-details .swiper-button-next:hover:after {
  background-color: rgba(0, 0, 0, 0.3);
}

@media (max-width: 575px) {

  .portfolio-details .swiper-button-prev,
  .portfolio-details .swiper-button-next {
    display: none;
  }
}

.portfolio-details .swiper-pagination {
  margin-top: 20px;
  position: relative;
}

.portfolio-details .swiper-pagination .swiper-pagination-bullet {
  width: 10px;
  height: 10px;
  background-color: color-mix(in srgb, var(--default-color), transparent 85%);
  opacity: 1;
}

.portfolio-details .swiper-pagination .swiper-pagination-bullet-active {
  background-color: var(--accent-color);
}

.portfolio-details .portfolio-description h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
}

.portfolio-details .portfolio-description p {
  padding: 0;
}

/*--------------------------------------------------------------
# Publications Section
--------------------------------------------------------------*/
.publications {
  padding: 60px 0;
}

.publications .pub-subheading {
  font-size: 24px;
  font-weight: 400;
  margin-bottom: 30px;
}

.pub-item {
  display: flex;
  gap: 30px;
  align-items: flex-start;
  margin-bottom: 45px;
}

.pub-thumb {
  flex: 0 0 280px;
  max-width: 280px;
}

.pub-thumb img {
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.pub-body {
  flex: 1;
  position: relative;
  padding-left: 28px;
  /* room for the star */
}

.pub-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  color: #212529;
}

.pub-authors {
  font-size: 15px;
  margin-bottom: 4px;
  color: #212529;
}

.pub-authors .me {
  font-weight: 700;
}

.pub-venue {
  font-size: 15px;
  font-style: italic;
  color: #8a8a8a;
  margin-bottom: 12px;
}

.pub-links .btn {
  border: 1px solid #ced4da;
  background: #fff;
  color: #212529;
  font-size: 14px;
  padding: 6px 14px;
  margin-right: 8px;
  border-radius: 4px;
}

.pub-links .btn:hover {
  background: #f1f3f5;
  border-color: #adb5bd;
  transition: 0.3s;
}

.pub-links .btn i {
  margin-right: 6px;
}

/* Award badges */
.pub-award {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #f5c518;
  /* default: Best Paper Award (gold/orange) */
  color: #212529;
  font-size: 14px;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 50rem;
  /* pill shape */
  margin-bottom: 12px;
}

.pub-award.honorable {
  background: #64b168;
  /* Honorable Mention (green) */
  color: #fff;
}

.pub-award i {
  font-size: 15px;
}

/* Stack thumbnail above text on small screens */
@media (max-width: 768px) {
  .pub-item {
    flex-direction: column;
    gap: 15px;
  }

  .pub-thumb {
    flex: 0 0 auto;
    max-width: 100%;
  }
}

/*--------------------------------------------------------------
# News Section
--------------------------------------------------------------*/
.news .news-item {
  display: flex;
  gap: 30px;
  margin-bottom: 24px;
}

.news .news-date {
  flex: 0 0 120px;      /* fixed-width date column so all entries align */
  font-weight: 700;
  color: var(--heading-color);
}

.news .news-text {
  flex: 1;
}

.news .news-toggle {
  background: none;
  border: none;
  padding: 0;
  font-weight: 600;
  color: var(--accent-color);
  cursor: pointer;
}

.news .news-toggle:hover {
  text-decoration: underline;
}

/* Swap the label depending on state — no JS needed */
.news .news-toggle .when-expanded {
  display: none;
}

.news .news-toggle[aria-expanded="true"] .when-collapsed {
  display: none;
}

.news .news-toggle[aria-expanded="true"] .when-expanded {
  display: inline;
}

.news .news-scroll {
  max-height: 320px;
  overflow-y: auto;
  padding-right: 12px; /* keeps text off the scrollbar */
}

.news .news-scroll::-webkit-scrollbar {
  width: 6px;
}

.news .news-scroll::-webkit-scrollbar-thumb {
  background: #ced4da;
  border-radius: 3px;
}