/* Variables */
:root {
    --nav-height: 70px; /* Navbar height */
}

/* Centered content for main sections */
.center-content {
    display: flex;
    flex-direction: column; /* Align items in a column */
    align-items: center;    /* Center items horizontally */
    text-align: center;     /* Center text inside */
    margin: 0 auto;        /* Center the container itself */
}


/* Body styling */
body {
    padding-top: 80px;          /* Add padding to the body for spacing */
}

/* Navbar Styling */
.navbar {
    background-color: #fff; /* Background color */
    position: fixed;        /* Fixed position */
    top: 0;                 /* Stick to the top */
    width: 100%;            /* Full width */
    z-index: 1000;          /* Bring it to the front */
    min-height: var(--nav-height);
    display: flex;          /* Use flexbox for layout */
    align-items: center;    /* Center items vertically */
    padding: 0 20px;        /* Padding on the sides */
    justify-content: center; /* Space between logo and links */
    box-sizing: border-box; /* Ensure padding doesn't affect width */
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); /* Add shadow effect */
    transition: box-shadow 0.3s ease; /* Smooth transition for shadow effect */
}

/* Optional: Change shadow on scroll for a dynamic effect */
.navbar.scrolled {
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.4); /* Darker shadow when scrolled */
}


/* Container for header content */
.container {
    display: flex;
    max-width: 1200px;     /* Max width for the content */
    margin: 0 auto;        /* Center the container */
}

/* Logo Styling */
.logo {
    width: 160px;
    height: 48px;
   /* height: 50px;            /* Set a height for the logo */
/*     margin-right: 570px;      /* Add space between logo and navigation */
    /*display: inline-block;   /* Make sure the logo stays inline */
}

/* Responsive Styles for Smaller Screens */
@media (max-width: 768px) {
    .logo {
        width: 160px;
        height: 48px;
       /* height: 40px;        /* Reduce the logo height slightly for smaller screens */
        margin-right: 0;     /* Remove the large right margin on smaller screens */
    }
}

/* Navigation Links */
.nav-links {
    list-style: none;
    display: flex;
    flex-direction: row;
    margin: 0;
    padding: 0;
}

/* Submenu indicators (simple, visible triangles) */
.nav-links li[data-has-children] > a .arrow { 
    display:inline-block; 
    width:0; height:0; 
    margin-left:6px; 
    border-left:5px solid transparent; 
    border-right:5px solid transparent; 
    border-top:6px solid currentColor; 
    transition: transform .25s ease; 
}
/* Rotate down arrow when open (mobile accordion) */
.nav-item.open > a .arrow.arrow-down { transform: rotate(180deg); }
/* Nested (right) arrow */
.dropdown-content li[data-has-children] > a .arrow.arrow-right { 
    border-top:5px solid transparent; 
    border-bottom:5px solid transparent; 
    border-left:6px solid currentColor; 
    border-right:none; 
    margin-left:8px; 
}
.dropdown-content li.open > a .arrow.arrow-right { transform: rotate(90deg); }
/* Desktop hover cue (optional rotate on hover for top level) */
@media (min-width:769px){
    .nav-links > li[data-has-children]:hover > a .arrow.arrow-down:not(.no-rotate) { transform: rotate(180deg); }
}

nav ul li {
    margin: 0 10px; /* Adds spacing between each list item (nav link) */
}
/* Link Styling */
.nav-links li a {
    text-decoration: none;      /* Remove underline from links */
    color: #3D1209;               /* Change link color */
    font-weight: normal;         /* Optional: make links bold */
    font-size: 15px;           /* Set font size */
    font-family: 'Poppins', sans-serif; /* Change font family */
    padding: 0 10px;          /* Add padding to each link */
    display: block;            /* Make the links block-level elements */
    font-weight: 600; /* Regular weight */
    line-height: 24px;
    letter-spacing: -0.18px; /* Adjusted to match the value provided */
    text-align: left;
    text-underline-position: from-font; /* This might not work in all browsers, so check compatibility */
    text-decoration-skip-ink: none; /* Ensures text decoration doesn't affect ink */
    transition: background-color 0.3s ease, color 0.3s ease; /* Smooth transition */
    text-transform: uppercase; 
}


/* Red hover effect */
.nav-links li a:hover {
    background-color: #f4e8d4;      /* Red background on hover */
    color:#3D1209;               /* White text on hover */
    border-radius: 4px;         /* Optional: Add rounded corners */
}


/* Dropdown container */
.dropdown-content {
    display: none; /* Hidden by default */
    position: absolute;
    top: 100%; /* Position below the parent link */
    left: 0;
    background-color: #fff;
    min-width: 250px; /* Increase width to fit longer subpage titles */
    box-shadow: 0px 8px 16px rgba(0,0,0,0.2);
    z-index: 1;
    list-style: none; /* Remove bullet points in the dropdown */
    padding: 0; /* Remove padding */
    margin: 0; /* Remove margin */
}

/* Nested Dropdown container */
.dropdown-content .dropdown-content {
    left: calc(100% + 10px); /* Position to the right of the parent dropdown while accounting for padding */
    top: 0; /* Align with the top of the parent dropdown */
    margin-left: 1px; /* Small gap between parent and child dropdown */
}

/* Third-level (great-grandchild) positioning on desktop */
.dropdown-content .dropdown-content .dropdown-content {
    left: 100%;
    top: 0;
}

.dropdown-content li {
    padding: 5px 10px;
    list-style: none;
}

/* Style for dropdown links */
.dropdown-content li a {
    color: #3D1209; /* Text color */
    padding: 5px;
    display: block;
    font-size: 16px; /* Adjust font size */
    font-weight: normal; /* Make the text unbold */
    text-align: left; /* Align the text to the left */
    white-space: nowrap; /* Prevent text from wrapping */
    text-transform: none;
}

/* Show dropdown on hover */
.dropdown:hover .dropdown-content {
    display: block;
}

/* Hide nested dropdown by default */
.dropdown .dropdown-content li .dropdown-content {
    display: none; 
}

/* Show nested dropdown on hover */
.dropdown .dropdown-content li:hover .dropdown-content {
    display: block;
}

/* Remove arrow for subpages */
.dropdown-content li a::after {
    content: "";  /* No arrow for subpages */
}

/* Optional hover effect for dropdown links */
.dropdown-content li a:hover {
    background-color: white;
    color: #006df2 ; /* Optional: change text color on hover */
    font-weight: bold; /* Make the text bold on hover */
}
/* Mobile styles */
@media (max-width: 768px) {
  .dropdown-content {
    position: static;
    width: 100%;
    box-shadow: none;
  }

  .dropdown-content .dropdown-content {
    left: 0;
    margin-left: 15px;
    position: static;
  }

  /* Fix for double arrows */
  .dropdown > a::after {
    float: right;
    margin-left: 0;
  }

  /* Hide HTML arrows */
  .dropdown > a {
    position: relative;
  }
  .dropdown > a .arrow {
    display: none;
  }
}

/* Desktop hover behavior */
@media (min-width: 769px) {
  .dropdown {
    position: relative;
  }

  .dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    /* Add invisible padding to prevent hover gap */
    padding-top: 5px;
  }

  .dropdown-content::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 5px;
  }

  .dropdown:hover .dropdown-content,
  .dropdown-content:hover {
    display: block;
  }

  /* Nested dropdowns */
  .dropdown-content .dropdown-content {
    left: 100%;
    top: 0;
    margin-bottom: -10px;
    padding-bottom: 10px;
    margin-top: -5px;
  }
}

/* Hero Section */
.hero {
    position: relative; /* Allows positioning of child elements */
    height: 70vh; /* Adjusted height to make the image smaller */
    width: 100vw; /* Ensure it stretches the full width */
    min-height: 600px; 
    flex-direction: column; /* Stack content vertically */
    display: flex; /* Use flexbox for vertical and horizontal centering of the text */
    justify-content: center; /* Centers the content horizontally */
    align-items: center; /* Centers the content vertically */
    text-align: center; /* Centers the text */
    color: white; /* Makes the text white to contrast with the image */
    margin-top: 0; /* Ensure no extra margin from the top */
    margin-bottom: 0; /* Ensure no extra margin from the bottom */
    padding: 0; /* Ensure no extra padding */
    z-index: 1; /* Keeps the text above the image */
    overflow: hidden; /* Prevents the image from overflowing */
}

.hero-logo {
    width: 20vw; /* Responsive width (15% of the viewport width) */
    max-width: 200px; /* Maximum size for larger screens */
    height: auto; /* Maintain aspect ratio */
    display: block;
    margin: 20px auto; /* Center the logo */
}


/* Hero Image */
.hero-image {
    position: absolute; /* Absolute positioning to place it behind the text */
    top: 0;
    left: 0;
    width: 100%; /* Make the image fill the width */
    height: 100%; /* Ensure it fills the container's height */
    object-fit: cover; /* Ensures the image covers the area while maintaining aspect ratio */
    z-index: -1; /* Places the image behind the content */
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    overflow-x: hidden; /* Prevent horizontal scrolling */
}


/* Dark Overlay */
.hero::before {
    content: ''; /* Empty content for the overlay */
    position: absolute; /* Position overlay above the image */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(44, 68, 90, 0.6); /* Light blue transparent background */
    z-index: 0; /* Keeps the overlay below the text but above the image */
}

/* Content styling (heading, subheading, description) */
.hero .content {
    position: relative; /* Absolute positioning to place content inside the hero section */
    z-index: 1; /* Keeps the text above the image */
    padding: 0 20px; /* Optional: Adds padding around the text */
    text-align: center; /* Center-align the text content */
    color: white; /* Ensures text is visible against the background */
    max-width: 900px; /* Limit width for larger screens */
    width: 100%; /* Ensure it’s responsive */
    box-sizing: border-box;
}


/* Heading styles */
.hero .heading {
    font-size: 3rem; /* Adjust the font size */
    margin: 0.5rem 0;
    line-height: 0.8;
    color: white;
    font-family: 'Poppins', sans-serif;
}

/* Subheading styles */
.hero .subheading {
    font-size: 1.5rem; /* Adjust the font size */
    margin: 1rem 0;
    line-height: 0.4;
    color: white;
    font-family: 'Poppins', sans-serif;
    
}

/* Description styling */
.hero .description {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    max-width: 1000px; /* Optional, to limit the width of the description */
    line-height: 1.4;
    font-family: 'Poppins', sans-serif;
    font-weight: 400; 

}

/* Responsive Styles */

/* For screens smaller than 1024px (medium devices) */
@media screen and (max-width: 1024px) {
    .hero {
        height: 60vh; /* Adjust height for medium screens */
    }

    .hero-logo {
        width: 25vw; /* Adjust logo width */
        max-width: 150px;
    }

    .hero .heading {
        font-size: 2.5rem;
    }

    .hero .subheading {
        font-size: 1.2rem;
    }

    .hero .description {
        font-size: 1rem;
    }

    .hero .content {
        padding-top: 30px; /* Add some space at the top */
    }
}

/* For screens smaller than 768px (tablets and small devices) */
@media screen and (max-width: 768px) {
    .hero {
        height: 50vh; /* Reduce height for smaller screens */
    }

    .hero-logo {
        width: 30vw; /* Smaller logo width */
        max-width: 120px;
    }

    .hero .heading {
        font-size: 2rem;
    }

    .hero .subheading {
        font-size: 1rem;
    }

    .hero .description {
        font-size: 0.9rem;
    }

    .hero .content {
        padding-top: 40px; /* Add more space at the top */
    }
}

/* For screens smaller than 480px (mobile devices) */
@media screen and (max-width: 480px) {
    .hero {
        height: 40vh; /* Further reduce height on small mobile screens */
    }

    .hero-logo {
        width: 35vw; /* Even smaller logo width */
        max-width: 100px;
    }

    .hero .heading {
        font-size: 1.5rem;
    }

    .hero .subheading {
        font-size: 0.85rem;
    }

    .hero .description {
        font-size: 0.75rem;
    }

    .hero .content {
        padding-top: 50px; /* Increase padding-top for very small screens */
    }
}

/* Container for the video and link */
.video-container {
    width: 100%;              /* Allow the video container to take full width */
    max-width: 900px;         /* Reduce max-width for narrower video */
    margin: 0 auto;           /* Center the container */
    padding: 0 15px;          /* Add some padding on sides */
    text-align: left;         /* Align the venue text and link to the left */
}

/* Styling the YouTube video iframe */
.video {
    width: 100%;              /* Make video full width */
    height: 60vh;             /* Increase height to make it taller */
    max-height: 600px;        /* Set a max height to prevent it from being too tall */
}

/* Responsive Styles */

/* For screens larger than 768px */
@media (min-width: 768px) {
    .video-container {
        max-width: 800px;  /* Reduce max-width for narrower video */
        padding: 0;        /* Remove padding for better alignment */
    }

    .video {
        height: 65vh;      /* Increase height for larger screens */
    }

    .venue-text, .link-with-icon {
        font-size: 1.2rem; /* Increase font size for better readability */
    }

    .link-with-icon svg {
        width: 20px;
        height: 20px;
    }
}

/* For screens smaller than 768px */
@media (max-width: 768px) {
    .video-container {
        padding: 0 10px;   /* Add padding for smaller screens */
    }

    .video {
        height: 50vh;      /* Set a taller height for smaller screens */
    }

    .venue-text, .link-with-icon {
        font-size: 1rem;   /* Adjust font size for smaller screens */
    }

    .link-with-icon svg {
        width: 16px;
        height: 16px;
    }
}

/* For very small screens (max-width 480px) */
@media (max-width: 480px) {
    .video-container {
        max-width: 100%;   /* Full width for very small screens */
        padding: 0 5px;    /* Reduce padding */
    }

    .video {
        height: 45vh;      /* Set a proportional height for very small screens */
    }

    .venue-text, .link-with-icon {
        font-size: 0.9rem; /* Smaller font size */
    }

    .link-with-icon svg {
        width: 14px;
        height: 14px;
    }
}

/* Flex container for venue text and link */
.venue-container {
    display: flex;
    justify-content: flex-start; /* Align content to the left */
    align-items: center;
    margin-top: 10px;            /* Add space above the venue text */
}

/* Styling for venue text */
.venue-text {
    font-size: 1.1rem;
    color: #333;
}

/* Styling for the link */
.link-with-icon {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: #0056b3;
    font-weight: bold;
    margin-left: 4px;
    font-size: 1.1rem;
}

.link-with-icon:hover {
    color: #0056b3;
}

/* SVG icon styling */
.link-with-icon svg {
    margin-left: 4px;
    width: 18px;
    height: 18px;
    fill: currentColor; /* Inherit color from the link */
}



/* Styling for the enhanced heading */
.heading {
    font-size: 40px; /* Increase font size */
    font-weight: bold; /* Make it bold */
    color: black; /* Set text color to black */
    text-align: center; /* Center-align */
    margin-top: 30px;
    margin-bottom: 20px;
    text-transform: uppercase; /* Make text uppercase */
    font-family: 'Poppins', sans-serif; /* Use a modern font */
    text-align: center;
}

.subheading {
    font-size: 24px; /* Increase font size */
    font-weight: bold; /* Make it bold */
    color: black; /* Set text color to black */
    text-align: center; /* Center-align */
    margin-top: 30px; /* Margin above the subheading */
    margin-bottom: 20px; /* Margin below the subheading */
    text-transform: sentencecase; /* Make text sentencecase */
    font-family: 'Poppins', sans-serif; /* Use a modern font */
    text-align: center;
}


/* Description Styling */
.description {
    margin-top: 20px;          /* Add margin above the description */
    text-align: center;       /* Optional: Justify text for better readability */
    line-height: 1.6;          /* Increase line height for better readability */
    width: 100%;          /* Limit the width of the description */
    font-size: 20px;
    font-size: 16px;
    text-align: center;

}

/* New Section Below Hero Section */
.announcement {
    padding: 20px 0;
    /*background-color: #f8f8f8; /* Light background color for contrast */
    text-align: center;
    margin-bottom: 10px; /* Add space between announcement and next section */
    margin-top: 20px;
}

.announcement h2 {
    font-size: 2rem;
    color: #3A8BF3; /* Dark color for the heading */
    margin-bottom: 1rem;
    font-family: 'Poppins', sans-serif; /* Use a modern font */
    font-weight: 600;

}

.announcement p {
    font-size: 1.2rem;
    color: #353535; /* Slightly lighter color for paragraph text */
    line-height: 1.6;
    max-width: 900px; /* Optional: to limit the paragraph width */
    margin: 0 auto; /* Centers the paragraph */
    font-family: 'Poppins', sans-serif; /* Use a modern font */

}

/* Responsive Design */

/* For screens smaller than 768px (tablets and small screens) */
@media screen and (max-width: 768px) {
    .announcement h2 {
        font-size: 1.6rem; /* Smaller font size for headings */
    }

    .announcement p {
        font-size: 1rem; /* Smaller font size for paragraph text */
        padding: 0 10px; /* Add padding to avoid text touching the edges on small screens */
    }
}

/* For screens smaller than 480px (mobile devices) */
@media screen and (max-width: 480px) {
    .announcement h2 {
        font-size: 1.4rem; /* Even smaller font size for mobile devices */
    }

    .announcement p {
        font-size: 0.9rem; /* Smaller font size for mobile paragraph text */
        padding: 0 15px; /* Padding on mobile devices */
    }
}

/* Notice / Information Banner (replaces prior registration announcement block) */

/* Notice / Information Banner */
.notice {
    max-width: 900px;
    margin: 20px auto;
    padding: 16px 20px;
    background: #f1f6ff; /* soft info background */
    border-left: 6px solid rgb(37, 37, 197); /* brand blue */
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    color: #1f2937;
    text-align: left;
    font-family: 'Poppins', sans-serif;
}

.notice .notice-title {
    margin: 0 0 8px 0;
    font-weight: 700;
    font-size: 1.2rem;
    color: #0f172a;
}

.notice .notice-date {
    font-size: 0.9rem;
    color: #475569;
    margin: 0 0 8px 0;
}

.notice p {
    margin: 8px 0;
    font-size: 1rem;
    line-height: 1.6;
}

/* Tighten spacing for last paragraph inside a notice */
.notice p:last-child {
    margin-bottom: 0;
}

.notice ul {
    margin: 8px 0 8px 1.25rem;
}

.notice li {
    margin: 6px 0;
}

/* Variant hooks (for future use) */
.notice.info { border-left-color: rgb(37, 37, 197); background: #f1f6ff; }
.notice.warning { border-left-color: #d97706; background: #fff7ed; }
.notice.success { border-left-color: #16a34a; background: #ecfdf5; }

@media (max-width: 768px) {
    .notice {
        margin: 16px 12px;
        padding: 14px 16px;
    }
}

/* Updates section header */
.updates-title {
    font-weight: 700;
    text-align: center;
    margin: 24px auto 8px auto;
    font-family: 'Poppins', sans-serif;
}

.updates-container {
    max-width: 900px;
    margin: 0 auto 8px auto;
}

/* (Former registration announcement responsive block removed; using notice component instead) */

/* Sponsors Section Styling */
.sponsors-section {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.sponsors-title {
    font-size: 2.5rem;
    color: #000000;
    text-align: center;
    margin-bottom: 30px;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
}

h1.sponsors-title {
    font-size: 2.5rem;
    color: #000000;
    text-align: center;
    margin-bottom: 30px;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
}

.sponsor-tier {
    margin-bottom: 20px;
}

.tier-header {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    font-family: 'Poppins', sans-serif;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

.tier-header .tier-label {
    padding: 15px 40px;
    font-size: 1.3rem;
    font-weight: 600;
    color: white;
    border-radius: 0 0 25px 25px;
    margin-right: 0;
    white-space: nowrap;
    position: relative;
    z-index: 2;
    transform: translateY(4px);
    width: 160px;
    text-align: center;
}

/* Responsive design for sponsor tier headers */
@media screen and (max-width: 768px) {
    .tier-header {
        max-width: 95%;
        margin-left: 10px;
        margin-right: 10px;
    }
    
    .tier-header .tier-label {
        padding: 12px 30px;
        font-size: 1.1rem;
        width: 140px;
    }
    
    .tier-header::after {
        left: 0 !important;
        right: 0 !important;
    }
}

@media screen and (max-width: 480px) {
    .tier-header {
        max-width: 98%;
        margin-left: 5px;
        margin-right: 5px;
    }
    
    .tier-header .tier-label {
        padding: 10px 25px;
        font-size: 1rem;
        width: 120px;
    }
    
    .tier-header::after {
        left: 0 !important;
        right: 0 !important;
    }
}

.tier-header .tier-text {
    display: none;
}

.tier-header::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 4px;
    background-color: #ddd;
    top: 0;
    z-index: 1;
}

.tier-label.gold {
    background: linear-gradient(135deg, #DAA520, #B8860B);
}

.tier-label.gold + .tier-text + .tier-header::after,
.gold-tier .tier-header::after {
    background: linear-gradient(135deg, #DAA520, #B8860B);
}

.tier-label.silver {
    background: linear-gradient(135deg, #D3D3D3, #C0C0C0);
    color: white;
}

.tier-label.silver + .tier-text + .tier-header::after,
.silver-tier .tier-header::after {
    background: linear-gradient(135deg, #D3D3D3, #C0C0C0);
}

.tier-label.bronze {
    background: linear-gradient(135deg, #CD853F, #D2691E);
}

.tier-label.bronze + .tier-text + .tier-header::after,
.bronze-tier .tier-header::after {
    background: linear-gradient(135deg, #CD853F, #D2691E);
}

.tier-label.exhibitor {
    background: linear-gradient(135deg, #32CD32, #228B22);
}

.tier-label.exhibitor + .tier-text + .tier-header::after,
.exhibitor-tier .tier-header::after {
    background: linear-gradient(135deg, #32CD32, #228B22);
}

.sponsor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: center;
    justify-items: center;
    place-items: center;
}

/* Responsive sponsor grid */
@media screen and (max-width: 768px) {
    .sponsor-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        padding: 0 10px;
    }
}

@media screen and (max-width: 480px) {
    .sponsor-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 5px;
    }
}

.bronze-tier .sponsor-grid {
    gap: 25px;
    max-width: 600px;
    margin: 0 auto;
    grid-template-columns: repeat(2, 1fr);
    align-items: start;
    justify-items: center;
    place-items: start;
}

.exhibitor-tier .sponsor-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 600px;
    margin: 0 auto;
    place-items: center;
}

/* Specific sizing for exhibitor logos */
.exhibitor-tier .sponsor-item .sponsor-logo-link img { /* KAIST Metaverse and VIRNECT */
    max-height: 95%;
}

/* Silver tier grid layout */
.silver-tier .sponsor-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 600px;
    margin: 0 auto;
    place-items: center;
}

/* Specific sizing for Silver sponsors */
.silver-tier .sponsor-item .sponsor-logo-link img { /* Google and KAIST */
    max-height: 95%;
}

/* Specific sizing for Bronze sponsors */
.bronze-tier .sponsor-item .sponsor-logo-link img { /* ETRI and Apple */
    max-height: 95%;
}

/* Ensure ETRI logo maintains proper size with promotional buttons */
.bronze-tier .sponsor-item.has-promotional .sponsor-logo-link img {
    max-height: 120px;
    margin-bottom: 15px;
}

/* Ensure all sponsor logos maintain proper size when promotional buttons are present */
.sponsor-item.has-promotional .sponsor-logo-link img {
    max-height: 120px;
    margin-bottom: 15px;
}

/* Adjust Apple logo positioning to the right */
.sponsor-item.apple-logo {
    padding-left: 40px;
}

.sponsor-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 30px;
    background: transparent;
    transition: transform 0.3s ease;
    min-height: 120px;
    text-align: center;
}

.sponsor-item:hover {
    transform: scale(1.05);
}

.sponsor-logo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    text-decoration: none;
    transition: transform 0.2s ease;
    text-align: center;
    margin-bottom: 0;
}

.sponsor-logo-link:hover {
    transform: scale(1.05);
}

.sponsor-logo-link img {
    max-width: 100%;
    max-height: 150px;
    object-fit: contain;
    transition: transform 0.3s ease;
    display: block;
    margin: 0 auto;
}

/* Promotional buttons styling */
.promotional-buttons {
    margin-top: 15px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.promo-button {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: linear-gradient(135deg, #4971E7, #3B5BDB);
    color: black !important;
    text-decoration: none;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(73, 113, 231, 0.2);
    border: none;
    cursor: pointer;
    min-width: 110px;
    justify-content: center;
}

.promo-button:hover {
    background: linear-gradient(135deg, #3B5BDB, #2563EB);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(73, 113, 231, 0.4);
    color: white !important;
    text-decoration: none;
}

.promo-button i {
    font-size: 0.8rem;
}

.video-button {
    background: linear-gradient(135deg, #EF4444, #DC2626);
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.2);
    color: black !important;
}

.video-button:hover {
    background: linear-gradient(135deg, #DC2626, #B91C1C);
    box-shadow: 0 4px 10px rgba(239, 68, 68, 0.3);
    color: white !important;
}

.brochure-button {
    background: linear-gradient(135deg, #10B981, #059669);
    box-shadow: 0 2px 6px rgba(16, 185, 129, 0.2);
    color: black !important;
}

.brochure-button:hover {
    background: linear-gradient(135deg, #059669, #047857);
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    color: white !important;
}

/* Partners Section Styling */
.partners-section {
    padding: 0 20px 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.partners-title {
    font-size: 2.5rem;
    color: #000000;
    text-align: center;
    margin-bottom: 30px;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
}

h1.partners-title {
    font-size: 2.5rem;
    color: #000000;
    text-align: center;
    margin-bottom: 30px;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
}

h1.previous-sponsors-title {
    font-size: 2.5rem;
    color: #000000;
    text-align: center;
    margin-bottom: 30px;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
}

/* Responsive Design for H1 Headings */
@media screen and (max-width: 768px) {
    h1.sponsors-title,
    h1.partners-title,
    h1.previous-sponsors-title {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
}

@media screen and (max-width: 480px) {
    h1.sponsors-title,
    h1.partners-title,
    h1.previous-sponsors-title {
        font-size: 1.6rem;
        margin-bottom: 20px;
    }
}

.previous-sponsors-section {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    align-items: start;
    max-width: 900px;
    margin: 0 auto;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 25px 20px;
    background: transparent;
    transition: transform 0.3s ease;
    min-height: 120px;
}

.partner-item:hover {
    transform: scale(1.05);
}

.partner-logo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    text-decoration: none;
    transition: transform 0.2s ease;
}

.partner-logo-link:hover {
    transform: scale(1.05);
}

.partner-logo-link img {
    max-width: 100%;
    max-height: 80px;
    object-fit: contain;
    transition: transform 0.3s ease;
}

/* Specific logo size adjustments for better balance */
.partner-item:nth-child(1) .partner-logo-link img, /* IEEE */
.partner-item:nth-child(4) .partner-logo-link img, /* WWW Conference */
.partner-item:nth-child(5) .partner-logo-link img, /* KIISE */
.partner-item:nth-child(7) .partner-logo-link img, /* KNTO */
.partner-item:nth-child(8) .partner-logo-link img, /* Daejeon City */
.partner-item:nth-child(9) .partner-logo-link img { /* Daejeon Tourism */
    max-height: 45px;
}

.partner-item:nth-child(2) .partner-logo-link img { /* IEEE Computer Society */
    max-height: 60px;
}

.partner-item:nth-child(3) .partner-logo-link img { /* IEEE VGTC */
    max-height: 80px;
}

.partner-item:nth-child(6) .partner-logo-link img { /* HCI Society */
    max-height: 60px;
}

.partner-item:nth-child(7) .partner-logo-link img { /* Korea Tourism Organization */
    max-height: 80px;
}


/* Responsive Design for Sponsors and Partners */
@media screen and (max-width: 1024px) and (min-width: 769px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        max-width: 100%;
    }
}

@media screen and (max-width: 768px) {
    .sponsors-section,
    .partners-section {
        padding: 30px 15px;
    }
    
    .sponsors-title,
    .partners-title {
        font-size: 2rem;
        margin-bottom: 30px;
    }
    
    .tier-header {
        font-size: 1.3rem;
        padding: 12px 25px;
        margin-bottom: 25px;
        max-width: 800px;
        padding: 0 15px;
    }
    
    .sponsor-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        max-width: 100%;
    }
    
    .sponsor-item {
        padding: 20px;
        min-height: 100px;
        flex-direction: column;
        justify-content: flex-start;
    }
    
    .partner-item {
        padding: 20px 15px;
        min-height: 100px;
    }
    
    .sponsor-logo-link img {
        max-height: 110px;
    }
    
    /* Responsive sizing for specific sponsor logos */
    .silver-tier .sponsor-item .sponsor-logo-link img { /* Google and KAIST */
        max-height: 95%;
    }
    
    .bronze-tier .sponsor-item .sponsor-logo-link img { /* ETRI and Apple */
        max-height: 95%;
    }
    
    .exhibitor-tier .sponsor-item .sponsor-logo-link img { /* KAIST Metaverse and VIRNECT */
        max-height: 95%;
    }
    
    .partner-logo-link img {
        max-height: 70px;
    }

     /* Responsive promotional buttons for tablet */
    .promotional-buttons {
        margin-top: 12px;
        gap: 6px;
    }
    
    .promo-button {
        padding: 5px 10px;
        font-size: 0.7rem;
        min-width: 100px;
    }
    
    .sponsor-item.has-promotional .sponsor-logo-link img {
        max-height: 100px;
        margin-bottom: 12px;
    }
    
    .sponsor-item.apple-logo {
        padding-left: 30px;
    }
    
    /* Responsive logo size adjustments for tablet */
    .partner-item:nth-child(1) .partner-logo-link img, /* IEEE */
    .partner-item:nth-child(4) .partner-logo-link img, /* WWW Conference */
    .partner-item:nth-child(5) .partner-logo-link img, /* KIISE */
    .partner-item:nth-child(7) .partner-logo-link img, /* KNTO */
    .partner-item:nth-child(8) .partner-logo-link img, /* Daejeon City */
    .partner-item:nth-child(9) .partner-logo-link img { /* Daejeon Tourism */
        max-height: 45px;
    }
    
    .partner-item:nth-child(2) .partner-logo-link img { /* IEEE Computer Society */
        max-height: 60px;
    }
    
    .partner-item:nth-child(3) .partner-logo-link img { /* IEEE VGTC */
        max-height: 75px;
    }
    
    .partner-item:nth-child(6) .partner-logo-link img { /* HCI Society */
        max-height: 60px;
    }
    
    .partner-item:nth-child(7) .partner-logo-link img { /* Korea Tourism Organization */
        max-height: 75px;
    }
}

@media screen and (max-width: 480px) {
    .sponsors-section,
    .partners-section {
        padding: 20px 10px;
    }
    
    .sponsors-title,
    .partners-title {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    
    .tier-header {
        font-size: 1.1rem;
        padding: 10px 20px;
        margin-bottom: 20px;
        max-width: 100%;
        padding: 0 10px;
    }
    
    .sponsor-grid {
        gap: 15px;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        max-width: 100%;
    }
    
    .sponsor-item {
        padding: 15px;
        min-height: 80px;
        flex-direction: column;
        justify-content: flex-start;
    }
    
    .partner-item {
        padding: 15px 10px;
        min-height: 80px;
    }
    
    .sponsor-logo-link img {
        max-height: 80px;
    }
    
    /* Mobile responsive sizing for specific sponsor logos */
    .silver-tier .sponsor-item .sponsor-logo-link img { /* Google and KAIST */
        max-height: 95%;
    }
    
    .bronze-tier .sponsor-item .sponsor-logo-link img { /* ETRI and Apple */
        max-height: 95%;
    }
    
    .exhibitor-tier .sponsor-item .sponsor-logo-link img { /* KAIST Metaverse and VIRNECT */
        max-height: 95%;
    }
    
    .partner-logo-link img {
        max-height: 60px;
    }

    /* Responsive promotional buttons for mobile */
    .promotional-buttons {
        margin-top: 10px;
        gap: 5px;
    }
    
    .promo-button {
        padding: 4px 8px;
        font-size: 0.65rem;
        min-width: 90px;
        border-radius: 12px;
    }
    
    .sponsor-item.has-promotional .sponsor-logo-link img {
        max-height: 80px;
        margin-bottom: 10px;
    }
    
    .sponsor-item.apple-logo {
        padding-left: 20px;
    }
    
    /* Responsive logo size adjustments for mobile */
    .partner-item:nth-child(1) .partner-logo-link img, /* IEEE */
    .partner-item:nth-child(4) .partner-logo-link img, /* WWW Conference */
    .partner-item:nth-child(5) .partner-logo-link img, /* KIISE */
    .partner-item:nth-child(7) .partner-logo-link img, /* KNTO */
    .partner-item:nth-child(8) .partner-logo-link img, /* Daejeon City */
    .partner-item:nth-child(9) .partner-logo-link img { /* Daejeon Tourism */
        max-height: 40px;
    }
    
    .partner-item:nth-child(2) .partner-logo-link img { /* IEEE Computer Society */
        max-height: 50px;
    }
    
    .partner-item:nth-child(3) .partner-logo-link img { /* IEEE VGTC */
        max-height: 80px;
    }
    
    .partner-item:nth-child(6) .partner-logo-link img { /* HCI Society */
        max-height: 60px;
    }
    
    .partner-item:nth-child(7) .partner-logo-link img { /* Korea Tourism Organization */
        max-height: 80px;
    }
}

/* Responsive Styles */
@media (max-width: 768px) {
    .heading {
        font-size: 32px;      /* Decrease font size on medium screens */
        margin-top: 20px;
        margin-bottom: 15px;
    }

    .subheading {
        font-size: 20px;      /* Decrease font size for subheading */
        margin-top: 20px;
        margin-bottom: 15px;
    }

    .description {
        font-size: 15px;      /* Slightly reduce font size for better readability */
    }
}

@media (max-width: 480px) {
    .heading {
        font-size: 28px;      /* Further reduce font size for small screens */
        margin-top: 15px;
        margin-bottom: 10px;
    }

    .subheading {
        font-size: 18px;      /* Smaller font size for subheading */
        margin-top: 15px;
        margin-bottom: 10px;
    }

    .description {
        font-size: 14px;      /* Smaller font size for description */
        line-height: 1.4;     /* Adjust line height for smaller text */
        margin-top: 10px;     /* Reduce margin for smaller screens */
    }
}

/* Important Dates Section */
.important-dates-section {
    background-color: transparent; /* Remove blue background */
    padding: 40px; /* Add padding for spacing */
    color: #333; /* Dark text color for readability */
    border-radius: 8px; /* Optional: Adds rounded corners */
    margin: 30px 0; /* Optional: Adds margin between sections */
    box-shadow: none; /* Remove shadow */
    text-align: center; /* Centers the title */
    margin-bottom: 20px; /* Add space between announcement and next section */
    margin-top: 0px;
}

/* Title styling */
.important-dates-title {
    margin-top: 0px;
    margin-bottom: 20px;
    padding-top: 0px; /* Remove top padding */
    text-align: center;
    color: #333; /* Dark color for the title */
    font-weight: bold;
    font-family: 'Poppins', sans-serif;
}

/* Table styling */
.important-dates {
    width: 80%;
    padding-top: 0px; /* Remove top padding to prevent overlap */
    margin: 0 auto; /* Auto margin to horizontally center the table */
    border-collapse: separate; /* Allows border-radius to work properly */
    border-spacing: 0; /* Removes spacing between cells */
    background-color: transparent; /* Transparent background for the table */
    border-radius: 0; /* Remove table border radius */
    box-shadow: none; /* Remove shadow that might cause overlap */
    font-family: 'Poppins', sans-serif;
}

/* Table header styling */
.important-dates thead {
    background-color: #3A8BF3 !important; /* New blue color for table header */
    color: white; /* White text in header */
    text-align: center;
    border-radius: 35px 35px 0 0; /* More curved top corners */
    overflow: hidden; /* Ensures content respects border radius */
}

.important-dates th,
.important-dates td {
    padding: 12px;
    text-align: center;
    font-family: 'Poppins', sans-serif;
    color: #333; /* Dark text for table content */
}

.important-dates th {
    font-size: 1.1rem; /* Header font size */
    color: white;
    background-color: #3A8BF3 !important; /* New blue color for table header */
    border: none; /* Remove default borders */
}

.important-dates th:first-child {
    border-radius: 35px 0 0 0; /* Very curved top-left corner */
}

.important-dates th:last-child {
    border-radius: 0 35px 0 0; /* Very curved top-right corner */
}

.important-dates td {
    font-size: 1rem; /* Regular font size for table cells */
}

/* Styling for table rows */
.important-dates tbody {
    background-color: white; /* White background for table body */
    border-radius: 0 0 8px 8px; /* Rounded bottom corners */
}

.important-dates tr:nth-child(even) {
    background-color: white; /* White for alternate rows */
}

.important-dates tr:hover {
    background-color: #e2e2e2; /* Light grey on hover for rows */
}

/* Style for passed dates */
.important-dates tr.passed-date td {
    text-decoration: line-through;
    opacity: 0.7;
    color: #999; /* Optional: make the color lighter */
}

/* Keep the hover effect for passed dates */
.important-dates tr.passed-date:hover {
    background-color: #f0f0f0; /* Slightly different hover color */
}

/* Responsive Styles */

/* For screens smaller than 768px (tablets and small screens) */
@media screen and (max-width: 768px) {
    .important-dates-title {
        font-size: 1.4rem; /* Smaller title font size */
    }

    .important-dates th, .important-dates td {
        padding: 10px; /* Smaller padding for small screens */
        font-size: 0.9rem; /* Slightly smaller font size */
    }

    .important-dates-section {
        padding: 20px; /* Reduced padding for small screens */
    }
}

/* For screens smaller than 480px (mobile devices) */
@media screen and (max-width: 480px) {
    .important-dates-title {
        font-size: 1.5rem; /* Even smaller title font size for mobile */
    }

    .important-dates th, .important-dates td {
        padding: 8px; /* Smaller padding */
        font-size: 0.85rem; /* Smaller font size */
    }

    .important-dates-section {
        padding: 10px; /* Smaller padding for mobile */
    }

    .important-dates tr {
        font-size: 0.9rem; /* Smaller font size for rows */
    }
}

/* For larger screens (desktops) */
@media screen and (min-width: 1200px) {
    .important-dates-title {
        font-size: 2rem; /* Larger title font size for desktops */
    }

    .important-dates th, .important-dates td {
        padding: 14px; /* More padding for larger screens */
        font-size: 1.1rem; /* Larger font size for readability */
    }

    .important-dates-section {
        padding: 50px; /* More padding for large screens */
    }
}

/* Video Section Styling */
.video-container {
    text-align: center; /* Center everything inside the container */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: auto; /* Full viewport height */
    width: 100%; /* Full viewport width */
    padding: 0; /* Add padding for spacing */
    box-sizing: border-box; /* Include padding in height and width calculation */
    margin-top: 40px;
    margin-bottom: 20px; /* Add space between announcement and next section */
}

/* Styling for the YouTube video iframe */
.video {
    width: 200%; /* Full width of the container */
    height: 480px; /* Full height (80% of the viewport height) */
    max-width: 1060px; /* Limit max-width for large screens */
    max-height: 480px; /* Ensure it doesn't exceed 80% of viewport height */
    border: none; /* Remove any iframe border */
    margin-bottom: 20px; /* Adds space between video and venue text */
}

/* Responsive Design for Mobile (Screen widths smaller than 768px) */
@media screen and (max-width: 768px) {
    .video {
        width: 100%; /* Ensure the video takes full width on smaller screens */
        height: 60vh; /* Adjust height to 60% of the viewport height on smaller screens */
    }
}

/* Further adjustments for very small screens (max-width 480px) */
@media screen and (max-width: 480px) {
    .video {
        width: 100%; /* Full width */
        height: 50vh; /* Further adjust height for small screens */
    }
}

/* Venue Section Layout (Left for venue, Right for map) */
.venue-section {
    display: flex;
    justify-content: center; /* Center the content */
    align-items: flex-start;
    gap: 50px; /* Space between the venue details and the map */
    padding: 0 20px;
    max-width: 1000px;
    margin: 0 auto; /* Center the entire section */
    margin-bottom: 40px; /* Add space between announcement and next section */
    transform: translateX(0); /* Ensure no translation for better layout */
}

/* Styling for venue details */
.venue-details {
    flex: 1; /* Allow the venue details to take up available space */
    font-size: 1.1rem;
    color: #333;
    max-width: 50%; /* Limit the width of venue details */
    padding: 20px;
    transform: none; /* Ensure no left translation */
}

.venue-title {
    font-weight: bold;
    font-size: 1.5rem;
    margin-bottom: 10px;
    font-family: 'Poppins', sans-serif;
}

.venue-name {
    font-weight: bold; /* Make venue name bold */
    font-size: 1.2rem;
    margin-top: 10px;
    font-family: 'Poppins', sans-serif;
}

.venue-details p {
    margin: 8px 0; /* Add space between lines */
    font-family: 'Poppins', sans-serif;
}

.venue-details a {
    color: #1D4ED8; /* Blue color for the link */
    text-decoration: none;
    font-family: 'Poppins', sans-serif;
}

.venue-details a:hover {
    text-decoration: underline;
}

/* Google Map Styling */
.google-map {
    flex: 1; /* Allow the map to take up remaining space */
    max-width: 50%; /* Limit the map's width to 50% of the container */
}

/* For screens smaller than 768px (tablets and small screens) */
@media screen and (max-width: 768px) {
    .venue-section {
        flex-direction: column; /* Stack the venue details and map vertically */
        gap: 20px; /* Reduce space between the venue and map */
    }

    .venue-details {
        max-width: 100%; /* Full width for venue details on small screens */
        padding: 15px; /* Reduce padding */
    }

    .google-map {
        max-width: 100%; /* Full width for the map */
    }
}

/* For screens smaller than 480px (mobile devices) */
@media screen and (max-width: 480px) {
    .venue-details {
        font-size: 1rem; /* Slightly smaller font size for mobile devices */
    }

    .venue-title {
        font-size: 1.3rem; /* Smaller font size for titles */
    }

    .venue-name {
        font-size: 1rem; /* Smaller font size for venue name */
    }

    .google-map {
        height: 300px; /* Adjust map height for smaller screens */
    }
}


.footer {
    position: relative; /* Enables positioning of content inside the footer */
    height: 250px; /* Fixed height for footer */
    width: 100vw; /* Ensures the footer spans the full width */
    text-align: center; /* Centers the text horizontally */
    overflow: hidden; /* Prevents content from spilling outside the footer */
    box-shadow: 0 -5px 10px rgba(0, 0, 0, 0.2);  /* Add a top shadow instead of a translucent background */
    background-color: #ffffff; /* Ensure background is white (footer img's background) BLUEE */
    z-index: -3; /* Places the footer-background behind the footer img*/ 
}

.footer img {
    width: 100%; /* Ensures the image spans the full width of the footer */
    height: 100%; /* Ensures the image fills the footer's height without leaving gaps */
    object-fit: contain; /* Ensures the entire image fits within the footer without cropping -> maintain image ratio */
    position: absolute; /* Positions the image inside the footer */
    top: 0; /* Aligns the image to the top of the footer */
    left: 0; /* Aligns the image to the left of the footer */
    z-index: -2; /* Places the image behind the overlay and text */
}

.footer-overlay {
    position: absolute; /* Positions the overlay on top of the image */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4); /* Semi-transparent dark background */
    z-index: -1; /* Places the overlay between the image and text */
}

.footer-content {
    position: relative; /* Ensures the text stays above the overlay and image */
    font-size: 16px; /* Adjust text size as needed */
    padding: 20px; /* Adds spacing around the text */
    display: inline-block; /* Prevents the text background from spanning the entire width */
    border-radius: 5px; /* Optional: Adds rounded corners to the text background */
    max-width: 90%; /* Keeps the text block's width manageable */
    margin: 0 auto; /* Centers the text block */
    z-index: 1; /* Ensures the text stays on top of the overlay */
    font-weight: 600; 
    font-family: 'Poppins', sans-serif;

}

/* Footer overlay (currently transparent; adjust rgba for darkening effect) */
.footer::before {
    content: ''; /* Empty content for the overlay */
    position: absolute; /* Position overlay above the image */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0); /* Dark transparent background (This line has no visible effect) */
    z-index: 0; /* Keeps the overlay below the text but above the image */
}
/* Media queries for responsiveness */
@media (max-width: 768px) {
    .footer {
        height: 150px; /* Adjust height for smaller screens */
    }

    .footer-content {
        font-size: 14px; /* Adjust text size */
        padding: 15px; /* Adjust padding */
    }
}

@media (max-width: 480px) {
    .footer {
        height: 120px; /* Further adjust height for extra small screens */
    }

    .footer-content {
        font-size: 12px; /* Smaller text size */
        padding: 10px; /* Smaller padding */
    }
}


/* Hamburger navigation toggle */
.hamburger { 
    display:none; width:46px; height:46px; background:transparent; border:0; cursor:pointer; position:absolute; top:12px; right:16px; border-radius:6px; transition: background .25s ease; box-sizing:border-box; 
}
.hamburger:focus-visible { outline:2px solid #1e1e1e; outline-offset:2px; }
.hamburger:hover { background:#f5f5f5; }
.hamburger-bar { 
    position:absolute; left:50%; width:28px; height:3px; background:#222; border-radius:3px; transition: transform .34s cubic-bezier(.645,.045,.355,1), opacity .25s ease; transform-origin:center; transform:translateX(-50%); 
}
.hamburger-bar:nth-child(1){ top:14px; }
.hamburger-bar:nth-child(2){ top:21px; }
.hamburger-bar:nth-child(3){ top:28px; }
/* Centered X transformation */
body.nav-open .hamburger-bar:nth-child(1){ top:21px; transform:translate(-50%,0) rotate(45deg); }
body.nav-open .hamburger-bar:nth-child(2){ opacity:0; }
body.nav-open .hamburger-bar:nth-child(3){ top:21px; transform:translate(-50%,0) rotate(-45deg); }

@media (max-width: 768px) {
  .hamburger { display:flex; }
  body.nav-open .nav-links { transform: translateY(0); opacity:1; pointer-events:auto; }
  .nav-links { position:fixed; top:var(--nav-height); left:0; right:0; background:#fff; flex-direction:column; align-items:stretch; gap:0; max-height:calc(100vh - var(--nav-height)); overflow-y:auto; box-shadow:0 6px 18px rgba(0,0,0,.15); transform:translateY(-10px); opacity:0; pointer-events:none; transition: opacity .25s ease, transform .25s ease; z-index:999; }
  .nav-links li { margin:0; position:relative; }
  .nav-links > li > a { padding:14px 20px; border-bottom:1px solid #eee; }
  .nav-links a { font-size:16px; }
  .nav-links li.open > .dropdown-content { max-height:800px; opacity:1; visibility:visible; }
  .dropdown-content { position:static; box-shadow:none; padding:0; margin:0; max-height:0; overflow:hidden; transition:max-height .35s ease, opacity .3s ease; opacity:0; visibility:hidden; }
  .dropdown-content .dropdown-content { margin-left:0; padding-left:14px; border-left:3px solid #f2f2f2; }
  /* Third level indentation on mobile */
  .dropdown-content .dropdown-content .dropdown-content { padding-left:18px; border-left:3px solid #ececec; }
  li[data-has-children] > a { display:flex; align-items:center; justify-content:space-between; }
  /* Mobile adjustments for arrows (keep triangles) */
  .nav-links li[data-has-children] > a .arrow { margin-left:auto; }
  .dropdown-content li[data-has-children] > a .arrow.arrow-right { margin-left:6px; }
}

/* Style for passed deadlines */
.passed-deadline {
    text-decoration: line-through;
    opacity: 0.7;
    color: #999 !important;
}

/* Remove rounded corners on nav link hover for mobile */
@media (max-width: 768px) {
    .nav-links li a:hover {
        border-radius: 0 !important; /* Square edges on mobile */
    }
}