/* --- Global Variables & Base Styles --- */
:root {
    --primary-color: #0A1A2F; /* Deep Navy Blue */
    --secondary-color: #B8860B; /* Dark Goldenrod - Much better contrast */
    --light-bg: #F8F9FA;
    --text-dark: #343A40;
    --text-light: #FFFFFF;
    --font-heading: 'Lora', serif;
    --font-body: 'Inter', sans-serif;
    --transition-speed: 0.4s ease-in-out;
    --border-radius: 8px;
    --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.15);
    --shadow-dark: 0 12px 40px rgba(0, 0, 0, 0.25);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base for rem units */
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.7;
    background-color: #fff;
    overflow-x: hidden; /* Prevent horizontal scroll from animations */
}

.container {
    max-width: 1300px; /* Slightly wider container */
    margin: 0 auto;
    padding: 0 1.5rem;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2.8rem, 6vw, 4.8rem); margin-bottom: 1.5rem; }
h2 { font-size: clamp(2.2rem, 4.5vw, 3.5rem); margin-bottom: 2.5rem; }
h3 { font-size: clamp(1.6rem, 2.5vw, 2.2rem); margin-bottom: 1.2rem; }
p { margin-bottom: 1rem; }
a { color: var(--secondary-color); text-decoration: none; transition: var(--transition-speed); }
a:hover { color: #8B690B; text-decoration: underline; } /* Darker on hover */
ul { list-style: none; padding-left: 0; margin-bottom: 1rem;}
ul li { margin-bottom: 0.5rem; position: relative; padding-left: 1.5rem;}
ul li::before {
    content: "\f00c"; /* Font Awesome checkmark */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--secondary-color);
    position: absolute;
    left: 0;
    top: 0;
}

/* --- Utility Classes --- */
.bg-light { background-color: var(--light-bg); }
.bg-dark { background-color: var(--primary-color); color: var(--text-light); }
.bg-dark h2, .bg-dark h3, .bg-dark h4 { color: var(--text-light); }
.text-center { text-align: center; }
.text-light { color: var(--text-light); }
.text-primary { color: var(--primary-color); }
.large { font-size: 1.25rem; line-height: 1.8; }
.section-intro { max-width: 900px; margin: 0 auto 3rem auto; text-align: center; font-size: 1.15rem; }
.full-width { width: 100%; }
.my-5 { margin-top: 3rem; margin-bottom: 3rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.sr-only { /* For accessibility - visually hide content but keep for screen readers */
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}
.required { color: var(--secondary-color); font-weight: 700;}


.section-tag {
    display: inline-block;
    background-color: rgba(184, 134, 11, 0.15); /* Light gold tint from new secondary */
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.section-tag.text-light {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--text-light);
}
.section-divider {
    border: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    width: 60%;
    margin: 4rem auto;
}

/* --- Buttons --- */
.btn {
    display: inline-flex; /* Use flex for icon alignment */
    align-items: center;
    justify-content: center;
    padding: 1rem 2.2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    transition: var(--transition-speed);
    cursor: pointer;
    border: 2px solid transparent;
    font-size: 1.05rem;
    gap: 0.75rem; /* Space between text and icon */
    white-space: nowrap; /* Prevent button text from wrapping */
}
.btn-primary {
    background-color: var(--secondary-color);
    color: var(--text-light);
}
.btn-primary:hover {
    background-color: #8B690B; /* Darker gold */
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    text-decoration: none;
}
.btn-secondary {
    background-color: transparent;
    color: var(--text-light);
    border-color: var(--text-light);
}
.btn-secondary:hover {
    background-color: var(--text-light);
    color: var(--primary-color);
    border-color: var(--text-light); /* Maintain border */
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    text-decoration: none;
}
.btn-sm {
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
}

/* --- Header & Navigation --- */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.2rem 0;
    transition: background-color var(--transition-speed), padding var(--transition-speed), box-shadow var(--transition-speed);
}
.main-header.scrolled {
    background-color: var(--primary-color);
    padding: 0.8rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-light);
    text-decoration: none;
    line-height: 1; /* Ensure no extra spacing */
}
.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2rem;
}
.nav-link {
    color: var(--text-light);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-speed);
    position: relative;
    padding: 5px 0; /* Add padding for underline effect */
}
.nav-link:hover {
    color: var(--secondary-color);
    text-decoration: none;
}
.nav-link::after { /* Underline effect */
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: width var(--transition-speed);
}
.nav-link:hover::after {
    width: 100%;
}
.nav-link.btn { 
    padding: 0.75rem 1.5rem; /* Adjust button padding */
    text-decoration: none;
}

/* Hamburger menu (mobile) */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 10px; /* Make clickable area larger */
    background: transparent;
    border: none;
    z-index: 1001; /* Ensure it's above other elements */
}
.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-light);
    transition: var(--transition-speed);
}

/* --- Hero Section --- */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
    overflow: hidden;
}
.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}
.video-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(10, 26, 47, 0.7), rgba(10, 26, 47, 0.9)); /* Darker gradient tint */
    z-index: -1;
}
.hero-content {
    max-width: 900px;
    padding: 0 1.5rem;
}
.hero-content h1 { color: var(--text-light); font-weight: 800; text-shadow: 0 4px 10px rgba(0,0,0,0.3); }
.hero-content p { font-size: 1.35rem; margin: 1.8rem 0 3rem; font-weight: 300; } /* Lighter weight for subtext */
.hero-buttons { display: flex; justify-content: center; gap: 1.5rem; }

/* --- General Content Section --- */
.content-section {
    padding: 8rem 0; /* More vertical space */
    position: relative; /* For reveal-on-scroll */
}

/* Two Column Layout */
.two-column-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem; /* More gap */
    align-items: center;
}
.column-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}
.visual-formula {
    margin-top: 2.5rem;
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}
.visual-formula .result {
    font-size: 2.8rem;
    color: var(--secondary-color);
    display: block; /* Make the result stand out on its own line */
    margin-top: 0.5rem;
}
.visual-formula .formula-element {
    font-weight: 500;
}

/* Innovators Grid */
.innovators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); /* Smaller cards for more names */
    gap: 1.5rem;
    margin: 4rem 0;
}
.innovator-card {
    background: #fff;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-speed);
}
.innovator-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}
.innovator-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    border: 3px solid var(--secondary-color);
}
.innovator-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}
.innovator-card span {
    font-size: 0.9rem;
    color: #666;
    display: block; /* Ensure it takes full width */
}
blockquote {
    font-family: var(--font-heading);
    font-style: italic;
    font-size: 1.75rem;
    max-width: 900px;
    margin: 4rem auto 3rem;
    position: relative;
    padding: 0 2rem;
    line-height: 1.4;
}
.accent-border {
    border-left: 5px solid var(--secondary-color);
    padding-left: 2rem;
    font-size: 1.5rem;
    text-align: left;
}

/* Feature Boxes (in About section) */
.feature-boxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}
.feature-box {
    background-color: #fff;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    text-align: center;
    border-bottom: 4px solid var(--secondary-color);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}
.feature-box:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}
.feature-box i {
    font-size: 3.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}
.feature-box h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}
.feature-box p {
    font-size: 0.95rem;
}

/* Accordion Styling */
.accordion {
    max-width: 900px;
    margin: 4rem auto;
}
.accordion-item {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-light);
}
.accordion-header {
    width: 100%;
    padding: 1.5rem 2rem;
    background-color: var(--light-bg);
    color: var(--primary-color);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    text-align: left;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-speed);
}
.accordion-header:hover, .accordion-header[aria-expanded="true"] {
    background-color: #e6e6e6;
    color: var(--secondary-color);
}
.accordion-header[aria-expanded="true"] i {
    transform: rotate(180deg);
}
.accordion-header i {
    font-size: 1.2rem;
    transition: transform var(--transition-speed);
}
.accordion-content {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.7s ease-in-out, padding 0.7s ease-in-out;
}
.accordion-content.active {
    max-height: 500px; /* Large enough value to cover content */
    padding: 1.5rem 2rem;
}
.accordion-content p:last-child { margin-bottom: 0; } /* Remove bottom margin for last paragraph */


/* Impact Section (Grid of Benefits) */
.three-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* 3 columns, responsive */
    gap: 2.5rem;
    margin-top: 3rem;
}
.info-card {
    background: var(--light-bg); /* Card background always light */
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    text-align: left;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    color: var(--text-dark); /* Ensure text is dark on light bg */
    border-top: 4px solid var(--secondary-color); /* Subtle accent */
}
.info-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}
.info-card i { /* Font Awesome Icons */
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    display: block; /* Ensure icon is on its own line */
}
.info-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
}
.info-card p {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* How It Works (Timeline) */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 5rem auto;
    padding: 0 1rem;
}
.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--secondary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}
.timeline-item {
    padding: 1.5rem 0;
    position: relative;
    width: 50%;
}
.timeline-item.right-aligned { /* For right side of timeline */
    left: 50%;
    padding-left: 3rem; /* Space for the line and dot */
}
.timeline-item.left-aligned { /* For left side of timeline */
    left: 0;
    padding-right: 3rem; /* Space for the line and dot */
    text-align: right;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border: 4px solid var(--secondary-color);
    top: 30px; /* Adjust vertical position */
    border-radius: 50%;
    z-index: 1;
}
.timeline-item.right-aligned::after { left: -10px; } /* Position dot on right side */
.timeline-item.left-aligned::after { right: -10px; } /* Position dot on left side */

.timeline-content {
    padding: 2rem;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}
.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}
.timeline-content h3 { font-size: 1.5rem; margin-bottom: 0.8rem; }
.timeline-content p { font-size: 0.95rem; }

/* Vision Section */
.vision-section {
    height: 100vh;
    background: url('media/future-campus.jpg') no-repeat center center/cover;
    background-attachment: fixed; /* Parallax effect */
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    text-align: center;
    position: relative;
}
.vision-section::before { /* Dark overlay for text readability */
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 26, 47, 0.65); /* Adjusted for better contrast */
    z-index: 1;
}
.vision-content {
    position: relative;
    z-index: 2;
    padding: 4rem 2rem;
    max-width: 900px;
}
.vision-content h3 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    color: var(--text-light);
    margin-bottom: 1.8rem;
    font-weight: 800;
    text-shadow: 0 3px 8px rgba(0,0,0,0.4);
}
.vision-content h3:last-child { margin-bottom: 0; color: var(--secondary-color); } /* Highlight key motto */

/* Contact Form */
.contact-form {
    padding: 2.5rem;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    border-top: 4px solid var(--secondary-color);
}
.contact-form .form-group { margin-bottom: 1.5rem; }
.contact-form label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 600;
    color: var(--primary-color);
}
.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: var(--light-bg);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}
.contact-form input:focus, .contact-form textarea:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.2); /* Use new secondary color for focus */
    outline: none;
}
.contact-form textarea { resize: vertical; }


/* --- Footer --- */
.main-footer {
    background: var(--primary-color);
    color: rgba(255,255,255,0.85);
    padding: 5rem 0 2.5rem;
    font-size: 0.95rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr); /* Branding column wider */
    gap: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}
.footer-column h4 { color: var(--text-light); margin-bottom: 1.2rem; font-weight: 600; font-size: 1.15rem; }
.footer-logo {
    font-family: var(--font-heading);
    color: var(--text-light);
    font-size: 2rem;
    margin-bottom: 1rem;
    line-height: 1;
}
.footer-branding p { margin-bottom: 1.5rem; }
.footer-column ul { list-style: none; }
.footer-column ul li { margin-bottom: 0.6rem; }
.footer-column ul a { color: rgba(255,255,255,0.8); text-decoration: none; }
.footer-column ul a:hover { color: var(--secondary-color); text-decoration: underline; }
.social-links { margin-top: 1.5rem; display: flex; gap: 1rem; }
.social-links a { color: var(--text-light); transition: var(--transition-speed); }
.social-links a:hover { color: var(--secondary-color); transform: translateY(-3px); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    font-size: 0.85rem;
    flex-wrap: wrap; /* For mobile */
    gap: 1rem;
}
.footer-bottom p { margin: 0; }
.footer-bottom a { color: rgba(255,255,255,0.7); text-decoration: none; }
.footer-bottom a:hover { color: var(--secondary-color); }


/* --- Animations (Keyframes) --- */
/* Hero Content Animation */
.animate-fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s forwards;
}
.delay-1 { animation-delay: 0.3s; }
.delay-2 { animation-delay: 0.6s; }
.delay-3 { animation-delay: 0.9s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Reveal On Scroll */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.reveal-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .nav-menu { gap: 1.2rem; }
    .hero-content h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
    .hero-content p { font-size: 1.2rem; margin: 1.5rem 0 2.5rem; }
    .content-section { padding: 6rem 0; }
    .two-column-layout { gap: 3rem; }
    .innovators-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
    .feature-boxes { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
    .three-card-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
    .timeline::after { left: 1.5rem; } /* Adjust timeline line for smaller screens */
    .timeline-item { width: 100%; padding-left: 4.5rem; padding-right: 1.5rem; text-align: left; }
    .timeline-item.right-aligned { left: 0; padding-left: 4.5rem; }
    .timeline-item::after { left: 1rem; }
    .timeline-item.left-aligned::after { left: 1rem; }
    .timeline-item.left-aligned .timeline-content { text-align: left; } /* Align text left */
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    html { font-size: 15px; }
    .main-header { padding: 1rem 0; }
    .navbar { padding: 0 1rem; }
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        right: -100%;
        top: 0; /* Align to top */
        width: 70%;
        max-width: 300px; /* Limit width */
        height: 100vh;
        background-color: var(--primary-color);
        flex-direction: column;
        justify-content: center; /* Center menu items vertically */
        gap: 2rem;
        transition: right var(--transition-speed);
        box-shadow: -5px 0 15px rgba(0,0,0,0.2);
        padding: 2rem 1rem; /* Add internal padding */
    }
    .nav-menu.active { right: 0; }
    .nav-item .nav-link { font-size: 1.2rem; }
    .nav-item .nav-link::after { height: 3px; }

    .hero-buttons { flex-direction: column; gap: 1rem; }
    .two-column-layout { grid-template-columns: 1fr; gap: 3rem; }
    .reverse-on-mobile { grid-template-areas: "image" "form"; } /* Reverse order for contact */
    .reverse-on-mobile .column-form { grid-area: form; }
    .reverse-on-mobile .column-image { grid-area: image; }
    
    .innovators-grid { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
    .innovator-card img { width: 80px; height: 80px; }
    blockquote { font-size: 1.25rem; padding: 0 1rem; border-left-width: 3px; }

    .three-card-grid { grid-template-columns: 1fr; }
    .info-card { text-align: left; }

    .timeline { margin: 3rem auto; }
    .timeline::after { left: 20px; }
    .timeline-item { padding-left: 3rem; }
    .timeline-item::after { left: 10px; }
    .accordion-header { font-size: 1.1rem; padding: 1rem 1.5rem; }
    .accordion-content.active { padding: 1rem 1.5rem; }


    .vision-content { padding: 2rem 1rem; }
    .vision-content h3 { font-size: clamp(1.5rem, 4vw, 2.5rem); }

    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-column ul { padding: 0; }
    .footer-branding .social-links { justify-content: center; }
    .footer-bottom { flex-direction: column; }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    h1 { font-size: clamp(2.2rem, 8vw, 3.5rem); }
    h2 { font-size: clamp(1.8rem, 7vw, 2.8rem); }
    .hero-content p { font-size: 1rem; }
    .btn { padding: 0.8rem 1.5rem; font-size: 0.95rem; }
    .innovators-grid { grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); }
    .innovator-card { padding: 1rem 0.5rem; }
    .innovator-card img { width: 60px; height: 60px; margin-bottom: 0.5rem; }
    .innovator-card h4 { font-size: 1rem; }
    .innovator-card span { font-size: 0.75rem; }
    .timeline-item { padding-left: 2rem; }
    .timeline::after { left: 15px; }
    .timeline-item::after { left: 5px; top: 20px; width: 16px; height: 16px; border-width: 3px;}
    .vision-content h3 { font-size: clamp(1.2rem, 5vw, 2rem); }
}

/* --- Hamburger Menu Animation --- */
.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}
.hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}