/* ==================== ROOT VARIABLES ==================== */
:root {
    --primary-blue: #0066ff;
    --dark-blue: #001a4d;
    --darker-blue: #000d26;
    --black: #000000;
    --white: #ffffff;
    --gray: #a0a0a0;
    --light-gray: #e0e0e0;
    --glow-blue: rgba(0, 102, 255, 0.5);
    --transition: all 0.3s ease;

    /* Semantic theme tokens (dark mode = default) */
    --bg-primary: var(--black);
    --bg-secondary: var(--darker-blue);
    --bg-card-start: var(--dark-blue);
    --bg-card-end: var(--darker-blue);
    --bg-card-alt-end: var(--black);
    --text-primary: var(--white);
    --text-secondary: var(--gray);
    --border-color: rgba(0, 102, 255, 0.3);
    --navbar-bg: rgba(0, 13, 38, 0.95);
}

/* ==================== LIGHT MODE ==================== */
body.light-mode {
    --bg-primary: #f4f7fb;
    --bg-secondary: #e8edf5;
    --bg-card-start: #ffffff;
    --bg-card-end: #eef2f9;
    --bg-card-alt-end: #ffffff;
    --text-primary: #0a0f1e;
    --text-secondary: #4a5568;
    --border-color: rgba(0, 102, 255, 0.25);
    --navbar-bg: rgba(255, 255, 255, 0.92);
    --gray: #4a5568;
}

/* ==================== THEME TOGGLE BUTTON ==================== */
.theme-toggle-item {
    display: flex;
    align-items: center;
    list-style: none;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(0, 102, 255, 0.3);
    background: rgba(0, 102, 255, 0.08);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: rgba(0, 102, 255, 0.2);
    box-shadow: 0 0 12px var(--glow-blue);
    transform: rotate(15deg);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    flex-shrink: 0;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

body.light-mode .theme-toggle .icon-sun { display: block; }
body.light-mode .theme-toggle .icon-moon { display: none; }

.theme-toggle-label {
    display: none;
    font-weight: 500;
    font-size: 1rem;
}

/* ==================== IMAGE LIGHTBOX ==================== */
.timetable-img {
    cursor: zoom-in;
}

.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    padding: 30px;
}

.lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 95vw;
    max-height: 95vh;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox-overlay.active .lightbox-content {
    transform: scale(1);
}

.lightbox-content img {
    max-width: 95vw;
    max-height: 95vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 0 60px rgba(0, 102, 255, 0.4);
    cursor: default;
}

.lightbox-close {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--glow-blue);
    transition: var(--transition);
    font-size: 1.4rem;
    line-height: 1;
}

.lightbox-close:hover {
    background: #0052cc;
    transform: rotate(90deg);
}

.lightbox-hint {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--gray);
    font-size: 0.9rem;
    white-space: nowrap;
}

@media (max-width: 600px) {
    .lightbox-close {
        top: -50px;
        right: 0;
    }
    .lightbox-hint {
        bottom: -35px;
        font-size: 0.8rem;
    }
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==================== NAVIGATION BAR ==================== */
.navbar {
    position: sticky;
    top: 0;
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.1);
    transition: padding 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
    padding: 0;
}

.navbar.scrolled .nav-container {
    padding: 0.5rem 20px;
}

.navbar.scrolled .logo-img {
    width: 44px;
    height: 40px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.65rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: padding 0.3s ease;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 52px;
    height: 46px;
    border-radius: 40%;
    border: 2px solid var(--primary-blue);
    box-shadow: 0 0 10px var(--glow-blue);
    transition: width 0.3s ease, height 0.3s ease;
}

.nav-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 5px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 2px;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    box-shadow: 0 0 8px var(--glow-blue);
    transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-blue);
    background: rgba(0, 102, 255, 0.1);
    box-shadow: 0 0 15px var(--glow-blue);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: calc(100% - 32px);
    left: 16px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* ==================== HERO SECTION ==================== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: 100px 20px 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(0, 102, 255, 0.1), transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
    animation: fadeInUp 1.2s ease;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    animation: fadeInUp 1.4s ease;
}

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--text-primary);
    box-shadow: 0 4px 15px var(--glow-blue);
}

.btn-primary:hover {
    background: #0052cc;
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--glow-blue);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--text-primary);
    box-shadow: 0 4px 15px var(--glow-blue);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease;
}

.dept-logo {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    border: 3px solid var(--primary-blue);
    box-shadow: 0 0 40px var(--glow-blue);
    object-fit: cover;
    background: var(--bg-secondary);
    transition: var(--transition);
}

.dept-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 0 60px var(--glow-blue);
}

/* ==================== CAROUSEL SECTION ==================== */
.carousel-section {
    padding: 80px 20px;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-blue);
    margin: 15px auto 0;
    border-radius: 2px;
    box-shadow: 0 0 10px var(--glow-blue);
}

.stacked-carousel {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 0;
}

.carousel-track {
    position: relative;
    min-height: 350px;
}

.carousel-card {
    position: absolute;
    width: 100%;
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 40px;
    text-align: center;
    transition: all 0.6s ease;
    opacity: 0;
    transform: translateX(100px) scale(0.9);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.carousel-card.active {
    opacity: 1;
    transform: translateX(0) scale(1);
    z-index: 3;
    box-shadow: 0 15px 50px rgba(0, 102, 255, 0.3);
}

.carousel-card.prev {
    opacity: 0.5;
    transform: translateX(-100px) scale(0.85);
    z-index: 1;
}

.carousel-card.next {
    opacity: 0.5;
    transform: translateX(100px) scale(0.85);
    z-index: 1;
}

.card-icon {
    color: var(--primary-blue);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px var(--glow-blue));
}

.carousel-card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.carousel-card p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 30px;
}

.carousel-btn {
    background: var(--primary-blue);
    color: var(--text-primary);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px var(--glow-blue);
}

.carousel-btn:hover {
    background: #0052cc;
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--glow-blue);
}

.carousel-dots {
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--primary-blue);
    box-shadow: 0 0 10px var(--glow-blue);
}

/* ==================== UPDATES SECTION ==================== */
.updates-section {
    padding: 80px 20px;
    background: var(--bg-primary);
}

.updates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.update-card {
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    transition: var(--transition);
}

.update-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--glow-blue);
    border-color: var(--primary-blue);
}

.update-date {
    color: var(--primary-blue);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.update-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.update-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==================== CONTACT SECTION ==================== */
.contact-section {
    padding: 80px 20px;
    background: var(--bg-secondary);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    margin-top: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.info-item svg {
    color: var(--primary-blue);
    flex-shrink: 0;
    filter: drop-shadow(0 0 5px var(--glow-blue));
}

.info-item h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.info-item p {
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    background: var(--dark-blue);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 15px var(--glow-blue);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.error-msg {
    color: #ff4444;
    font-size: 0.85rem;
    margin-top: 5px;
    display: none;
}

.error-msg.show {
    display: block;
}

/* ==================== PAGE HEADER ==================== */
.page-header {
    padding: 120px 20px 60px;
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    text-align: center;
    border-bottom: 2px solid rgba(0, 102, 255, 0.3);
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.page-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* ==================== ABOUT PAGE ==================== */
.about-content {
    padding: 80px 20px;
    background: var(--bg-primary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 60px;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.about-text p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 15px;
}

.about-image {
    display: flex;
    justify-content: center;
}

.content-img {
    border-radius: 12px;
    border: 2px solid var(--primary-blue);
    box-shadow: 0 10px 40px var(--glow-blue);
    transition: var(--transition);
}

.content-img:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px var(--glow-blue);
}

.vision-section {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 60px;
}

.vision-section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.vision-section p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.value-card {
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--glow-blue);
    border-color: var(--primary-blue);
}

.value-icon {
    color: var(--primary-blue);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px var(--glow-blue));
}

.value-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.value-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.stats-section {
    padding: 80px 20px;
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-alt-end));
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat-item:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px var(--glow-blue);
}

.stat-item h3 {
    font-size: 3rem;
    color: var(--primary-blue);
    margin-bottom: 10px;
    text-shadow: 0 0 20px var(--glow-blue);
}

.stat-item p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ==================== ACADEMICS PAGE ==================== */
.academics-section {
    padding: 80px 20px;
    background: var(--bg-primary);
}

.level-section {
    margin-bottom: 60px;
}

.level-header {
    text-align: center;
    margin-bottom: 40px;
}

.level-header h3 {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.level-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.course-card {
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--glow-blue);
    border-color: var(--primary-blue);
}

.course-icon {
    color: var(--primary-blue);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px var(--glow-blue));
}

.course-card h4 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.course-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.timetable-section {
    padding: 80px 20px;
    background: var(--bg-secondary);
}

.timetable-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.timetable-card {
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-alt-end));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.timetable-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--glow-blue);
}

.timetable-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.timetable-img-wrapper {
    margin: 20px 0;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid rgba(0, 102, 255, 0.5);
}

.timetable-img {
    width: 100%;
    height: auto;
    transition: var(--transition);
}

.timetable-img:hover {
    transform: scale(1.05);
}

.timetable-card p {
    color: var(--text-secondary);
    margin-top: 15px;
}

.lecturers-section {
    padding: 80px 20px;
    background: var(--bg-primary);
}

.lecturers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.lecturer-card {
    background: linear-gradient(135deg, var(--bg-card-start), var(--bg-card-end));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.lecturer-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--glow-blue);
    border-color: var(--primary-blue);
}

.lecturer-icon {
    color: var(--primary-blue);
    margin: 0 auto 20px;
    filter: drop-shadow(0 0 10px var(--glow-blue));
}

.lecturer-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.lecturer-title {
    color: var(--primary-blue);
    font-size: 1rem;
    margin-bottom: 5px;
    font-weight: 600;
}

.lecturer-specialty {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-secondary);
    padding: 30px 20px;
    text-align: center;
    border-top: 1px solid rgba(0, 102, 255, 0.3);
}

.footer p {
    color: var(--text-secondary);
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .dept-logo {
        width: 300px;
        height: 300px;
    }

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

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .menu-toggle {
        display: block;
    }

    .theme-toggle-item {
        justify-content: center;
        width: 100%;
        margin-top: 10px;
        padding-top: 15px;
        border-top: 1px solid var(--border-color);
    }

    .theme-toggle {
        width: auto;
        height: auto;
        padding: 10px 24px;
        border-radius: 30px;
    }

    .theme-toggle:hover {
        transform: none;
    }

    .theme-toggle-label {
        display: inline;
    }

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

@media (max-width: 600px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .dept-logo {
        width: 250px;
        height: 250px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .carousel-card {
        padding: 25px;
    }

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