:root {
        --primary-color: #e30a17;
        --secondary-color: #ffffff;
        --text-color: #333333;
        --hover-color: #c00913;
    }

    body {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        transition: background-color 0.3s, color 0.3s;
    }

    /* Navbar Styles */
    .navbar {
        background-color: var(--primary-color) !important;
        padding: 1rem 0;
    }

    .navbar-brand {
        display: flex;
        align-items: center;
    }

    .btp-logo {
        width: 160px;
        height: 55px;
        margin-right: 10px;
    }

    .btp-logo-light { display: block; }
    .btp-logo-dark { display: none; }

    .logo-text {
        font-size: 1.2rem;
        font-weight: bold;
        text-align: left;
        line-height: 1.2;
    }

    .btp-text {
        color: #ffffff;
        font-size: 1.4rem;
        text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
    }

    .btp-alttext {
        color: #d0d0d0;
        font-size: 1rem;
    }

    .nav-link {
        color: var(--secondary-color) !important;
        font-weight: bold;
        padding: 0.5rem 1rem !important;
        position: relative;
        transition: all 0.3s ease;
    }

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        width: 0;
        height: 2px;
        background-color: var(--secondary-color);
        transition: all 0.3s ease;
    }

    .nav-link:hover::after {
        width: 100%;
        left: 0;
    }

    .navbar-nav .dropdown-menu {
        display: block;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: all 0.3s ease;
        border: none;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        border-radius: 8px;
        background-color: #fff;
        padding: 10px 0;
    }

    .navbar-nav .dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .navbar-nav .dropdown-item {
        color: var(--text-color);
        padding: 8px 20px;
        transition: all 0.2s ease;
    }

    .navbar-nav .dropdown-item:hover, .navbar-nav .dropdown-item:focus {
        background-color: rgba(227, 10, 23, 0.1);
        color: var(--primary-color);
    }

    /* Banner Styles */
    .banner-slider {
        height: 500px;
        position: relative;
    }

    .banner-slide {
        background-size: cover;
        background-position: center;
        height: 500px;
        position: relative;
        color: white;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    .banner-slide h1 {
        font-size: 2.5rem;
        font-weight: bold;
        text-align: center;
        padding: 20px;
        background-color: rgba(0, 0, 0, 0.5);
        width: 100%;
        position: absolute;
        bottom: 0;
        left: 0;
        margin: 0;
    }

    .slick-prev, .slick-next {
        font-size: 0;
        line-height: 0;
        position: absolute;
        top: 50%;
        display: block;
        width: 40px;
        height: 40px;
        padding: 0;
        transform: translate(0, -50%);
        cursor: pointer;
        color: transparent;
        border: none;
        outline: none;
        background: rgba(0,0,0,0.5);
        border-radius: 50%;
        z-index: 1;
    }

    .slick-prev:before, .slick-next:before {
        font-family: 'slick';
        font-size: 30px;
        line-height: 1;
        opacity: .75;
        color: white;
        -webkit-font-smoothing: antialiased;
    }

    .slick-prev { left: 20px; }
    .slick-next { right: 20px; }

    #darkModeToggle { cursor: pointer; }

    /* Content Styles */
    .section-title {
        font-size: 2rem;
        font-weight: bold;
        color: var(--primary-color);
        margin-bottom: 1.5rem;
        position: relative;
        padding-bottom: 0.5rem;
    }

    .section-title::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 50px;
        height: 3px;
        background-color: var(--primary-color);
    }

    .news-card {
        border: none;
        border-radius: 15px;
        overflow: hidden;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .news-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .news-card .card-img-top {
        height: 200px;
        object-fit: cover;
    }

    .news-card .card-body { padding: 1.5rem; }

    .news-card .card-title {
        font-size: 1.2rem;
        font-weight: bold;
        margin-bottom: 0.5rem;
    }

    .news-card .card-text { color: #666; }

    .btn-read-more {
        background-color: var(--primary-color);
        color: white;
        border: none;
        padding: 0.5rem 1rem;
        border-radius: 5px;
        transition: background-color 0.3s ease;
    }

    .btn-read-more:hover {
        background-color: var(--hover-color);
    }

    .announcement-list {
        background-color: #f8f9fa;
        border-radius: 15px;
        padding: 1.5rem;
    }

    .announcement-item {
        padding: 1rem;
        border-bottom: 1px solid #e9ecef;
        transition: background-color 0.3s ease;
    }

    .announcement-item:last-child { border-bottom: none; }
    .announcement-item:hover { background-color: #e9ecef; }

    .event-table {
        border-radius: 15px;
        overflow: hidden;
    }

    .event-table th {
        background-color: var(--primary-color);
        color: white;
    }

    .event-table td, .event-table th { padding: 1rem; }

    .event-table tr:nth-child(even) { background-color: #f8f9fa; }
    .event-table tr:hover { background-color: #e9ecef; }

    /* Footer Styles */
    .footer {
        background-color: var(--primary-color);
        color: var(--secondary-color);
        padding: 3rem 0;
        margin-top: 3rem;
    }

    .footer h5 { color: #fff; }

    .footer ul {
        list-style-type: none;
        padding: 0;
    }

    .footer ul li { margin-bottom: 0.5rem; }

    .footer a {
        color: var(--secondary-color);
        text-decoration: none;
    }

    .footer a:hover { text-decoration: underline; }

    /* Dark Mode Styles */
    .dark-mode {
        background-color: #333;
        color: #fff;
    }

    .dark-mode .navbar, .dark-mode .footer {
        background-color: #222 !important;
    }

    .dark-mode .nav-link, .dark-mode .footer {
        color: #fff !important;
    }

    .dark-mode .card {
        background-color: #444;
        color: #fff;
    }

    .dark-mode .card-header {
        background-color: #333;
        border-bottom: 1px solid #555;
    }

    .dark-mode .list-group-item {
        background-color: #444;
        color: #fff;
        border-color: #555;
    }

    .dark-mode .table { color: #fff; }

    .dark-mode .btp-logo-light { display: none; }
    .dark-mode .btp-logo-dark { display: block; }

    .dark-mode .navbar-nav .dropdown-menu { background-color: #444; }

    .dark-mode .navbar-nav .dropdown-item { color: #fff; }

    .dark-mode .navbar-nav .dropdown-item:hover, .dark-mode .navbar-nav .dropdown-item:focus {
        background-color: rgba(255, 255, 255, 0.1);
        color: #fff;
    }

    .dark-mode .section-title { color: #ffd700; }
    .dark-mode .section-title::after { background-color: #ffd700; }

    .dark-mode .news-card {
        background-color: #444;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }

    .dark-mode .news-card:hover {
        box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    }

    .dark-mode .news-card .card-title { color: #fff; }
    .dark-mode .news-card .card-text { color: #ccc; }

    .dark-mode .btn-read-more {
        background-color: #ffd700;
        color: #333;
    }

    .dark-mode .btn-read-more:hover { background-color: #ffea00; }

    .dark-mode .announcement-list { background-color: #333; }
    .dark-mode .announcement-item { border-bottom-color: #555; }
    .dark-mode .announcement-item:hover { background-color: #444; }

    .dark-mode .event-table {
        background-color: #333;
        color: #fff;
    }

    .dark-mode .event-table th {
        background-color: #222;
        color: #fff;
    }

    .dark-mode .event-table td {
        background-color: #333;
        color: #fff;
        border-color: #fff;
    }

    .dark-mode .event-table tr:nth-child(even) td { background-color: #3a3a4a; }
    .dark-mode .event-table tr:hover td { background-color: #444; }

    .dark-mode .text-muted { color: #aaa !important; }
	

.btp-class {
    padding: 2rem 0;
    transition: background-color 0.3s ease;
}

.btp-class .btp-card {
    border: none;
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.btp-class .btp-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.btp-class .card-header {
    border-bottom: none;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.btp-class .card-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: rgba(255,255,255,0.1);
    transform: rotate(45deg);
    transition: all 0.5s ease;
}

.btp-class .btp-card:hover .card-header::before {
    top: 100%;
    left: 100%;
}

.btp-class .card-title {
    color: #e30a17;
    font-weight: bold;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.btp-class .card-title::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #e30a17;
    transition: width 0.3s ease;
}

.btp-class .btp-card:hover .card-title::after {
    width: 100%;
}

.btp-class .card-text {
    color: #666;
    line-height: 1.6;
    transition: color 0.3s ease;
}

.btp-class .btp-card:hover .card-text {
    color: #333;
}

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

.btp-class .btp-card {
    animation: fadeIn 0.5s ease-out forwards;
    opacity: 0;
}

.btp-class .btp-card:nth-child(1) { animation-delay: 0.1s; }
.btp-class .btp-card:nth-child(2) { animation-delay: 0.3s; }
.btp-class .btp-card:nth-child(3) { animation-delay: 0.5s; }

.dark-mode .btp-class {
	/* background-color: #222; */
}

.dark-mode .btp-class .btp-card {
    background-color: #333;
    box-shadow: 0 5px 15px rgba(255,255,255,0.1);
}

.dark-mode .btp-class .btp-card:hover {
    box-shadow: 0 15px 30px rgba(255,255,255,0.2);
}

.dark-mode .btp-class .card-header {
    background-color: #444;
}

.dark-mode .btp-class .card-title {
    color: #fff;
}

.dark-mode .btp-class .card-title::after {
    background-color: #fff;
}

.dark-mode .btp-class .card-text {
    color: #ccc;
}

.dark-mode .btp-class .btp-card:hover .card-text {
    color: #fff;
}

.dark-mode .btp-class .card-header.bg-dark {
    background-color: #111 !important;
}

.dark-mode .btp-class .card-header.bg-danger {
    background-color: #8B0000 !important;
}
.publication-card, .video-card {
    transition: all 0.3s ease;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.publication-card:hover, .video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.publication-card .list-group-item {
    transition: background-color 0.3s ease;
}

.publication-card .list-group-item:hover {
    background-color: #f8f9fa;
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

.video-card .ratio {
    border-radius: 8px;
    overflow: hidden;
}

.video-list .btn {
    transition: all 0.3s ease;
}

.video-list .btn:hover {
    transform: translateY(-2px);
}

/* Dark mode styles */
.dark-mode .publication-card, .dark-mode .video-card {
    background-color: #333;
    color: #fff;
}

.dark-mode .publication-card .list-group-item {
    background-color: #444;
    color: #fff;
    border-color: #555;
}

.dark-mode .publication-card .list-group-item:hover {
    background-color: #555;
}

.dark-mode .btn-outline-primary {
    color: #ffd700;
    border-color: #ffd700;
}

.dark-mode .btn-outline-primary:hover {
    background-color: #ffd700;
    color: #333;
}

.dark-mode .text-muted {
    color: #aaa !important;
}

    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.5s ease, transform 0.5s ease;
    }

    .fade-in.show {
        opacity: 1;
        transform: translateY(0);
    }
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(255, 255, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    }
}

.login-btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
}

.login-btn:hover {
    background-color: #fff;
    color: #e30a17;
}

.login-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 1;
    }
    20% {
        transform: scale(25, 25);
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}

.login-btn:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

.login-text {
    display: inline-block;
    transition: all 0.3s ease;
}

.login-btn:hover .login-text {
    transform: translateX(-5px);
}

.login-btn i {
    transition: all 0.3s ease;
}

.login-btn:hover i {
    transform: translateX(5px);
}

/* Dark mode styles */
.dark-mode .login-btn {
    color: #e30a17;
    border-color: #e30a17;
    animation: pulse-dark 2s infinite;
}

.dark-mode .login-btn:hover {
    background-color: #e30a17;
    color: #fff;
}

@keyframes pulse-dark {
    0% {
        box-shadow: 0 0 0 0 rgba(227, 10, 23, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(227, 10, 23, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(227, 10, 23, 0);
    }
}