/* 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: "Raleway",  sans-serif;
  --nav-font: "Ubuntu",  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: #060606; /* Default color used for the majority of the text content across the entire website */
  --heading-color: #060606; /* Color for headings, subheadings and title throughout the website */
  --accent-color: #BD252D; /* 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: #060606;  /* The default color of the main navmenu links */
  --nav-hover-color: #060606; /* 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 */
  --nav-dropdown-background-color: #ffffff; /* Used as the background color for dropdown items that appear when hovering over primary navigation items */
  --nav-dropdown-color: #060606; /* Used for navigation links of the dropdown items in the navigation menu. */
  --nav-dropdown-hover-color: #BD252D; /* Similar to --nav-hover-color, this color is applied to dropdown navigation links when they are hovered over. */
}

/* Color Presets - These classes override global colors when applied to any section or element, providing reuse of the sam color scheme. */

.light-background {
  --background-color: #f9f9f9;
  --surface-color: #ffffff;
}

.dark-background {
  --background-color: #060606;
  --default-color: #ffffff;
  --heading-color: #ffffff;
  --surface-color: #252525;
  --contrast-color: #ffffff;
}

.accent-background {
  --background-color: #8F0007;
  --default-color: #ffffff;
  --heading-color: #ffffff;
  --surface-color: #EB545C;
  --contrast-color: #ffffff;
}

/* 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: color 0.3s ease;
}


a:hover {
  color: color-mix(in srgb, var(--accent-color), transparent 25%);
  text-decoration: none;
}



/* Navbar Styles */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    background: #439f6a;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.navbar-nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar-nav a:hover {
    color: #df6369;
}

.nav-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.nav-btn {
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50px;
    color: #333;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    display: inline-block;
}

.nav-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    background: #fff;
}

.nav-btn.active {
    background: linear-gradient(45deg, #df6369);
    color: white;
}

.content-section {
    display: none;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
    margin-top: 30px;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.content-section.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    text-align: center;
    background: linear-gradient(45deg, #df6369, #000);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.carousel {
    position: relative;
    max-width: 100%;
    margin: 30px 0;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    height: 300px;
}

.carousel-container {
    display: flex;
    width: 400%;
    height: 100%;
    transition: transform 0.8s ease-in-out;
}

.carousel-slide {
    width: 25%;
    color: white;
    padding: 60px 40px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.carousel-slide:nth-child(1) {
    background: #8F0007;
}

.carousel-slide:nth-child(2) {
    background: #06662e ;
}

.carousel-slide:nth-child(3) {
    background: #8F0007;
}

.carousel-slide:nth-child(4) {
    background: #064F24;
}

.carousel-slide h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.carousel-slide p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.carousel-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: #df6369;
    transform: scale(1.2);
}

.carousel-arrows {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.8);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    font-weight: bold;
    color: #333;
    transition: all 0.3s ease;
    z-index: 10;
}

.carousel-arrows:hover {
    background: #fff;
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 20px;
}

.carousel-next {
    right: 20px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.card {
    background: linear-gradient(145deg, #f8f9ff, #e8f0ff);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: #1a7741;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

.card p {
    color: #666;
    margin-bottom: 20px;
}

.card-button {
    background: #439f6a;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.card-button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.api-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.api-item {
    background: #439f6a;
    color: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.api-item:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.dataset-showcase {
    background: #fcb69f;
    border-radius: 20px;
    padding: 40px;
    margin: 30px 0;
    text-align: center;
}

.dataset-showcase h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #333;
}

.dataset-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
}

.tag {
    background: rgba(255, 255, 255, 0.8);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #333;
}

.back-to-hub:hover {
    background: #fff;
    transform: scale(1.05);
}


@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
    }
    
    .navbar-nav {
        gap: 1rem;
    }

    
    .nav-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .content-section {
        padding: 20px;
    }
}


/*--------------------------------------------------------------
# Scroll Top Button
--------------------------------------------------------------*/
.scroll-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: -15px;
  z-index: 99999;
  background-color: var(--accent-color);
  width: 44px;
  height: 44px;
  border-radius: 50px;
  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;
  bottom: 15px;
}

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

/*--------------------------------------------------------------
# Global Page Titles & Breadcrumbs
--------------------------------------------------------------*/
.page-title {
  --background-color: color-mix(in srgb, var(--default-color), transparent 96%);
  color: var(--default-color);
  background-color: var(--background-color);
  padding: 25px 0;
  position: relative;
}

.page-title h1 {
  font-size: 24px;
  font-weight: 700;
}

.page-title .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 14px;
  font-weight: 400;
}

.page-title .breadcrumbs ol li+li {
  padding-left: 10px;
}

.page-title .breadcrumbs ol li+li::before {
  content: "/";
  display: inline-block;
  padding-right: 10px;
  color: color-mix(in srgb, var(--default-color), transparent 70%);
}


/* Logo sizing (consistent header height) */
.header-logo-sm {
    height: 80px;
    width: auto;
}

.header-logo-lg {
    height: 110px;
    width: auto;
}

/* Divider styling */
.logo-divider {
    width: 3px;
    margin-left: 3px;
    height: 60px;
    background-color: #ccc;
}

/* Keep header stable */
.header .container-xl {
    min-height: 80px;
}

/* Responsive tweak */
@media (max-width: 768px) {
    .header-logo-sm {
        height: 65px;
    }

    .header-logo-lg {
        height: 90px;
    }

    .logo-divider {
        height: 55px !important;
        width: 2px;
    }
}