:root {
    --primary-blue: #003366;
    --accent-crimson: #A51C30;
    --neutral-white: #ffffff;
    --neutral-gray: #f8f9fa;
    --dark-gray: #333;
    --light-gray: #e9ecef;
    --gold-accent: #d4af37;
    --light-blue: #4d7cae;
    --gradient-primary: linear-gradient(135deg, var(--primary-blue), #0a4da3);
    --gradient-accent: linear-gradient(135deg, var(--accent-crimson), #d32f2f);
    --gradient-gold: linear-gradient(135deg, var(--gold-accent), #ffd700);
    --gradient-rainbow: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 99%, #fad0c4 100%);
    --gradient-sunset: linear-gradient(135deg, #ff6b6b 0%, #ffd93d 100%);
    --gradient-ocean: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-lavender: linear-gradient(135deg, #a6c0fe 0%, #f68084 100%);
    --gradient-forest: linear-gradient(135deg, #4ecdc4 0%, #556270 100%);
    --gradient-sunrise: linear-gradient(135deg, #ff9a9e 0%, #fad0c4 100%);
    --gradient-berry: linear-gradient(135deg, #e8198b 0%, #c7eafd 100%);
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--dark-gray);
    line-height: 1.6;
    background-color: var(--neutral-white);
}

h1,
h2,
h3,
h4,
h5,
.section-title,
.navbar-brand {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
}

/* Header and Navigation */
header {
    background: var(--neutral-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-size: 1.7rem;
    color: var(--accent-crimson);
    display: flex;
    align-items: center;
}

.navbar-brand img {
    height: 50px;
    margin-right: 15px;
}

.nav-link {
    color: var(--dark-gray);
    font-weight: 500;
    position: relative;
    padding: 10px 15px !important;
}

.nav-link:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 15px;
    right: 15px;
    height: 2px;
    background: var(--accent-crimson);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-link:hover:after,
.nav-link.active:after {
    transform: scaleX(1);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-crimson);
}

/* Department Hero Section */
.dept-hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1436491865332-7a61a109cc05?ixlib=rb-4.0.3&auto=format&fit=crop&w=1500&q=80') center/cover no-repeat;
    color: white;
    padding: 100px 0;
    margin-bottom: 50px;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 50px;
    color: var(--accent-crimson);
    position: relative;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--accent-crimson);
}

/* Program Cards */
.program-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    height: 100%;
}

.program-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

/* Lab Facilities */
.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.lab-item {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.lab-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Outcome Sections */
.outcome-section {
    background-color: var(--neutral-gray);
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
}

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

.outcome-list li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    position: relative;
    padding-left: 30px;
}

.outcome-list li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-crimson);
    font-weight: bold;
}

/* Vision & Mission */
.vm-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.vm-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--accent-crimson);
}

/* Footer */
footer {
    background: #111;
    color: #aaa;
    padding: 60px 0 20px;
}

.footer-title {
    color: white;
    font-size: 1.3rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--accent-crimson);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: #222;
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--accent-crimson);
    transform: translateY(-5px);
}

.copyright {
    border-top: 1px solid #333;
    padding-top: 20px;
    margin-top: 50px;
    text-align: center;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent-crimson);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    z-index: 100;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.back-to-top.show {
    opacity: 1;
}

/* Stats */
.stat-item {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-crimson);
    margin-bottom: 10px;
}

/* Gallery Styles */
.gallery-section {
    padding: 80px 0;
    margin: 0;
}

.gallery-title {
    color: maroon;
    text-align: center;
    margin-bottom: 40px;
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 2.8rem;
}

.gallery-title:after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: var(--accent-crimson);
    margin: 15px auto 0;
}

.gallery-container {
    position: relative;
    width: 90%;
    height: 70vh;
    margin: 0 auto;
    overflow: hidden;
}

.gallery-slide {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    opacity: 0;
    width: 65%;
    height: 100%;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
    transition: all 0.8s ease-in-out;
    background-size: cover;
    background-position: center;
}

.gallery-slide .content {
    position: absolute;
    bottom: 30px;
    left: 30px;
    background: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 10px;
    color: #fff;
}

.gallery-slide.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
    z-index: 4;
}

.gallery-slide.next {
    opacity: 0.9;
    transform: translate(20%, -50%) scale(0.85);
    z-index: 3;
}

.gallery-slide.next2 {
    opacity: 0.7;
    transform: translate(40%, -50%) scale(0.8);
    z-index: 2;
}

.gallery-slide.next3 {
    opacity: 0.5;
    transform: translate(60%, -50%) scale(0.75);
    z-index: 1;
}

/* Responsive Adjustments */
@media (max-width: 991px) {
    .navbar-brand {
        font-size: 1.5rem;
    }

    .navbar-brand img {
        height: 40px;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }

    .dept-hero {
        padding: 60px 0;
    }

    .dept-hero h1 {
        font-size: 1.8rem;
    }

    .gallery-container {
        height: 40vh;
        width: 100%;
    }

    .gallery-title {
        font-size: 1.8rem;
    }

    .gallery-slide {
        width: 90%;
    }

    .gallery-slide .content {
        bottom: 10px;
        left: 10px;
        padding: 10px;
        width: calc(100% - 20px);
    }

    .gallery-slide .content h1 {
        font-size: 1.2rem;
        margin-bottom: 5px;
    }

    .gallery-slide .content p {
        font-size: 0.9rem;
    }

    .gallery-slide.next {
        transform: translate(10%, -50%) scale(0.8);
        opacity: 0.5;
    }

    .gallery-slide.next2,
    .gallery-slide.next3 {
        display: none;
    }

    .lab-grid {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-direction: column;
        gap: 20px;
    }

    .outcome-section {
        padding: 20px;
    }

    .vm-card {
        margin-bottom: 20px;
    }
}

@media (max-width: 480px) {
    .dept-hero h1 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}