@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

html {
  --s: 10px; /* control the size*/
  --c1: rgba(214, 214, 214, 0.2); /* color of the lines, now 40% opaque */
  --c2: rgba(235, 235, 235, 0.2); /* color of the fill, now 40% opaque */
  
  --c:#0000,var(--c1) .5deg 119.5deg,#0000 120deg;
  --g1:conic-gradient(from  60deg at 56.25% calc(425%/6),var(--c));
  --g2:conic-gradient(from 180deg at 43.75% calc(425%/6),var(--c));
  --g3:conic-gradient(from -60deg at 50%   calc(175%/12),var(--c));
  background:
    var(--g1),var(--g1) var(--s) calc(1.73*var(--s)),
    var(--g2),var(--g2) var(--s) calc(1.73*var(--s)),
    var(--g3) var(--s) 0,var(--g3) 0 calc(1.73*var(--s)) 
    var(--c2);
  background-size: calc(2*var(--s)) calc(3.46*var(--s));
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; /* Keep existing font */
    margin: 0;
    background-color: transparent; /* Allow html background to show */
    color: #333;
    line-height: 1.6;
}

/* Navbar styling */
.navbar.is-dark-blue {
    background-color: #003366; /* ESA Blue */
    box-shadow: 0 2px 5px rgba(0,0,0,0.1); /* Subtle shadow for depth */
}
.navbar.is-dark-blue .navbar-item img {
    max-height: 40px; 
}
.navbar.is-dark-blue .navbar-item,
.navbar.is-dark-blue .navbar-link {
    color: #ffffff;
    transition: background-color 0.3s ease;
}
.navbar.is-dark-blue .navbar-item:hover,
.navbar.is-dark-blue .navbar-link:hover {
    background-color: #004488; /* Darker shade on hover */
    color: #ffffff;
}

/* Hero section styling */
.hero.is-light {
    background-color: #e9ecef; /* A slightly different light shade for hero */
    /* border-radius: 0 0 8px 8px; */ /* Rounded bottom corners if it's at the top - can be too much with navbar */
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    margin-bottom: 2rem; /* Space below hero */
}
.hero .hero-body {
    padding-top: 2rem;
    padding-bottom: 2rem;
}
.publication-title {
    color: #003366; /* ESA Blue */
    animation: fadeIn 0.5s ease-out 0.2s forwards;
    opacity: 0;
}
.publication-authors, #author-affiliations, .publication-links {
    animation: fadeIn 0.5s ease-out 0.4s forwards;
    opacity: 0;
}

/* Flex properties removed from this shared rule */

.publication-links {
    /* Flex properties are now specific to the links container */
    display: flex;
    flex-wrap: wrap; 
    justify-content: center; /* Center the buttons */
    gap: 0.5rem; /* Add some space between buttons */
    /* The animation and opacity are inherited from the rule above or can be re-declared if needed */
}

/* Main content sections styling */
section.section {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.07);
    margin-top: 1rem; /* Reduced top margin for tighter spacing if preferred */
    margin-bottom: 2rem;
    padding: 2rem;
    animation: fadeIn 0.6s ease-out forwards;
    opacity: 0; /* Initial state for animation */
    transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}

section.section:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* Titles within sections */
section.section .title { /* This targets Bulma's .title class within our sections */
    color: #003366; 
    margin-bottom: 1.5rem;
}
section.section .title .icon { /* Ensure icon color matches title if icons are used in titles */
    color: #003366;
}


/* Content styling */
.content p, .content ul, .content ol {
    color: #495057; /* Softer text color */
}
.content pre { /* BibTeX block */
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 1em;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
    white-space: pre-wrap; /* Allow wrapping for long BibTeX entries */
    word-break: break-all;
}

/* Link buttons in hero */
.publication-links .link-block a.button.is-outlined {
    border-color: #005288;
    color: #005288;
    transition: all 0.3s ease;
    margin-bottom: 0.5rem; /* Ensure buttons have a little space below them if they wrap */
}
.publication-links .link-block a.button.is-outlined:hover {
    background-color: #005288;
    color: white;
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 2px 5px rgba(0,82,136,0.3);
}

/* Footer styling - Reverted and Cleaned */
footer {
    background-color: #2c2c2c; /* Original dark grey */
    color: #ccc;
    padding: 40px 20px; /* Increased padding */
    text-align: center; /* Original alignment */
    border-top: 3px solid #003366; /* Accent border */
    margin-top: 3rem; /* Space above footer */
}

.footer-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between; /* Original layout */
    align-items: flex-start;
    gap: 20px;
}

.footer-content > div { /* Reverted: remove specific bg/padding from disliked attempt */
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
}

.footer-content h4 { /* Reverted */
    color: #fff;
    font-size: 1.2em;
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 1px solid #555; /* Subtle underline for footer headings */
}

/* This style is preserved as requested for initiated-by */
.initiated-by img {
    max-height: 50px; /* Ensure it doesn't get too big */
    display: inline-block; /* For proper padding application */
}

.contact-follow a { /* Original styling for social icons */
    color: #ccc;
    text-decoration: none;
    margin: 0 8px; /* Adjusted margin */
    font-size: 1.6em; /* Slightly larger */
    transition: color 0.3s ease, transform 0.3s ease;
}
.contact-follow a:hover {
    color: #fff;
    transform: scale(1.1);
}

.legal p { /* Original */
    font-size: 0.85em;
    margin-bottom: 8px;
    color: #aaa;
}
.legal a { /* Original */
    color: #ccc;
    text-decoration: underline;
    transition: color 0.3s ease;
}
.legal a:hover {
    color: #fff;
}

/* Ensure Bulma's list styling is used within .content by default */
/* If specific list styling outside .content is needed, it can be added here */

/* Responsive adjustments if necessary */
@media screen and (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        align-items: center;
    }
    .footer-content > div {
        min-width: 100%;
        text-align: center;
    }
    section.section {
        padding: 1.5rem;
        margin-left: 1rem;
        margin-right: 1rem;
    }
    .hero .hero-body {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Loader styling */
.loader {
  height: 80px;
  aspect-ratio: 1;
  display: grid;
}
.loader:before,
.loader:after {
  content: "";
  --c:no-repeat linear-gradient(#fff 0 0);
  background: var(--c), var(--c);
  background-size: 25% 50%;
  animation: l4 1.5s infinite linear;
}
.loader:after {
  transform: scale(-1);
}
@keyframes l4 {
  0%,
  10%  {background-position:33.4% 100%,66.6% 100%}
  40%  {background-position:33.4% 0,100% 100%}
  70%  {background-position:0 100%,66.6% 0}
  100% {background-position:33.4% 100%,66.6% 100%}
}