body {
    font-family: 'Roboto', sans-serif;
    background-color: #f0f0f0; /* Fallback color */
    background-image: url('https://icaihc.nitrr.ac.in/images/background.jpg');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.call-for-paper-header {
    background-color: #004b6b; /* Dark blue from top banner */
}

.main-container {
    max-width: 1400px;
    margin: 2rem auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    padding: 0;
    overflow: hidden; /* Important for containing column backgrounds */
}

/* --- Left Column --- */
.left-column {
    background-color: rgba(22, 107, 128, 0.85); /* Blue background */
    font-size: 1.1rem; /* Increased from 0.9rem */
    color: #ffffff; /* Light text */
}

.left-column p {
    margin-bottom: 0.8rem; /* Increased from 0.2rem */
    line-height: 1.8; /* Increased from 1.4 */
    color: #ffffff; /* Light text */
}

.section-title {
    font-weight: 700;
    font-size: 1.5rem; /* Increased from 1.1rem */
    padding-bottom: 10px; /* Increased from 5px */
    border-bottom: 3px solid; /* Increased from 2px */
    margin-bottom: 1.5rem; /* Increased from 1rem */
    margin-top: 2rem; /* Added top margin */
}

.left-column .section-title {
    color: #FFD700; /* Golden yellow for better contrast on blue */
    border-color: #FFD700;
}

.important-dates-title, .registration-fees-title {
    color: #FFD700; /* Golden yellow */
    border-color: #FFD700;
}

.organizer-section h6 {
    /* font-weight: 700; */
    font-size: 1.1rem; /* Added font size */
    color: #102c73; /* Golden yellow for headings */
    margin-top: 1.5rem; /* Increased from 0.8rem */
    margin-bottom: 0.5rem; /* Increased from 0.1rem */
}

.organizer-section .affiliation {
    font-size: 0.95rem;
    font-style: italic;
    opacity: 0.9;
    display: inline; /* Keep on same line */
    margin-left: 1rem; /* Add space before affiliation */
}

.organizer-section .affiliation::before {
    content: "— ";
    margin-right: 0.3rem;
}

/* Organizing Secretary Grid */
.organizing-secretary-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.secretary-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid rgba(255, 215, 0, 0.3);
}

/* .secretary-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 215, 0, 0.6);
} */

.secretary-img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #FFD700;
    margin-bottom: 0.8rem;
}

.secretary-name {
    font-weight: 700;
    font-size: 1rem;
    color: #ffffff;
    margin-bottom: 0.3rem;
}

.secretary-affiliation {
    font-size: 0.9rem;
    font-style: italic;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .organizing-secretary-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

.dates-table {
    background-color: transparent !important; /* Transparent background */
}

.dates-table td {
    border: none;
    padding: 0.6rem 0; /* Increased from 0.2rem */
    color: #ffffff !important; /* White text */
    font-size: 1.05rem; /* Added font size */
    line-height: 1.6; /* Added line height */
    background-color: transparent !important; /* Transparent background */
}

.dates-table td strong {
    color: #ffffff !important; /* White text for dates */
    font-weight: 700;
}

.fees-table {
    font-size: 1rem; /* Increased from 0.85rem */
    text-align: center;
    color: #ffffff !important; /* White text */
    margin-top: 1rem; /* Added margin */
    background-color: transparent !important; /* Transparent background */
}

.fees-table th, .fees-table td {
    padding: 0.8rem; /* Increased from 0.5rem */
    vertical-align: middle;
    color: #ffffff !important; /* White text */
    border-color: rgba(255, 255, 255, 0.2) !important; /* Subtle light borders */
    background-color: transparent !important; /* Transparent background */
}

.fees-table thead {
    background-color: transparent !important; /* Transparent background */
}

.fees-table thead th {
    color: #ffffff !important; /* White text for headers */
    font-weight: 700;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3) !important; /* White border */
}

/* --- Right Column --- */
.right-column {
    background-color: #d7f3e7; /* Light green background */
    color: #004D40; /* Dark text for better readability */
}

.right-column p {
    color: #004D40; /* Dark text */
}

.conference-title {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #004D40; /* Dark text */
}

.conference-description {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #004D40; /* Dark text */
}

.right-section-title {
    font-weight: 700;
    border-bottom: 2px solid #00796B;
    padding-bottom: 5px;
    margin-bottom: 1rem;
    display: inline-block; /* Makes border only as long as text */
    color: #004D40; /* Dark text */
}

.track-list {
    padding-left: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
    color: #004D40; /* Dark text */
}

.speakers-section .speaker-category {
    font-weight: bold;
    font-size: 0.9rem;
    color: #004D40; /* Dark text */
}

.speaker-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid #00796B;
    object-fit: cover;
    margin: 0.5rem 0;
}

.speaker-name {
    font-weight: 700;
    margin-bottom: 0;
    color: #004D40; /* Dark text */
}

.speaker-affiliation {
    font-size: 0.8rem;
    line-height: 1.2;
    color: #004D40; /* Dark text */
}

.ieee-xplore-logo {
    max-width: 200px;
    filter: none; /* Remove white filter for light green background */
}

.qr-code {
    max-width: 120px;
    border: 4px solid #00796B;
}


/* --- Footer --- */
.page-footer {
    background-color: #f8f9fa;
    border-top: 1px solid #dee2e6;
}

.footer-logo {
    height: 40px;
    margin-right: 20px;
}

.footer-link {
    text-decoration: none;
    font-weight: bold;
    color: #004b6b;
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
    .right-column {
        padding: 2rem !important;
    }
}