/* ===== CSS Variables ===== */
:root {
    --primary-color: #2563eb;
    --secondary-color: #0891b2;
    --accent-color: #06b6d4;
    --dark-color: #1e293b;
    --darker-color: #0f172a;
    --light-color: #f8fafc;
    --text-color: #334155;
    --text-light: #64748b;
    --white: #ffffff;
    --soft-blue: #3b82f6;
    --deep-navy: #1e3a8a;
    --soft-teal: #14b8a6;
    --shadow: 0 4px 14px rgba(37, 99, 235, 0.08);
    --shadow-lg: 0 10px 30px rgba(37, 99, 235, 0.12);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    --gradient-nuclear: linear-gradient(135deg, #0f172a 0%, #1e3a8a 40%, #1e40af 70%, #2563eb 100%);
    --gradient-soft: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

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

section {
    padding: 80px 0;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    text-align: center;
    margin-bottom: 3rem;
    color: var(--dark-color);
    position: relative;
    padding-bottom: 1rem;
    font-weight: 700;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-soft);
    border-radius: 2px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-brand .logo {
    height: 50px;
    width: auto;
    transition: var(--transition);
}

.nav-brand .logo:hover {
    transform: scale(1.05);
}

.nav-brand .brand-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .nav-brand .brand-text {
        font-size: 0.9rem;
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-soft);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.lang-switcher {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.4rem 0.8rem;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.lang-btn:hover,
.lang-btn.active {
    background: var(--gradient-soft);
    color: var(--white);
    border-color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-nuclear);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(8, 145, 178, 0.06) 0%, transparent 40%);
    animation: bgPulse 15s ease-in-out infinite;
    opacity: 0.8;
}

@keyframes bgPulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* Nuclear Orbit System */
.nuclear-orbits {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    z-index: 1;
}

.nuclear-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.9), rgba(37, 99, 235, 0.7));
    border-radius: 50%;
    box-shadow: 
        0 0 20px rgba(59, 130, 246, 0.8),
        0 0 40px rgba(37, 99, 235, 0.5),
        0 0 60px rgba(37, 99, 235, 0.3);
    animation: corePulse 4s ease-in-out infinite;
}

@keyframes corePulse {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 
            0 0 20px rgba(59, 130, 246, 0.8),
            0 0 40px rgba(37, 99, 235, 0.5),
            0 0 60px rgba(37, 99, 235, 0.3);
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.2);
        box-shadow: 
            0 0 30px rgba(59, 130, 246, 1),
            0 0 60px rgba(37, 99, 235, 0.7),
            0 0 90px rgba(37, 99, 235, 0.5);
    }
}

.orbit-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 3px solid rgba(59, 130, 246, 0.6);
    border-radius: 50%;
    transform-origin: center;
    box-shadow: 
        0 0 15px rgba(59, 130, 246, 0.4),
        inset 0 0 15px rgba(59, 130, 246, 0.2);
}

.orbit-1 {
    width: 200px;
    height: 200px;
    margin-left: -100px;
    margin-top: -100px;
    animation: rotateOrbit 20s linear infinite;
}

.orbit-2 {
    width: 350px;
    height: 350px;
    margin-left: -175px;
    margin-top: -175px;
    animation: rotateOrbit 30s linear infinite reverse;
    border-color: rgba(8, 145, 178, 0.55);
    box-shadow: 
        0 0 15px rgba(8, 145, 178, 0.35),
        inset 0 0 15px rgba(8, 145, 178, 0.2);
}

.orbit-3 {
    width: 500px;
    height: 500px;
    margin-left: -250px;
    margin-top: -250px;
    animation: rotateOrbit 40s linear infinite;
    border-color: rgba(20, 184, 166, 0.5);
    box-shadow: 
        0 0 15px rgba(20, 184, 166, 0.3),
        inset 0 0 15px rgba(20, 184, 166, 0.15);
}

@keyframes rotateOrbit {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.particle {
    position: absolute;
    width: 16px;
    height: 16px;
    background: radial-gradient(circle, rgba(59, 130, 246, 1), rgba(37, 99, 235, 0.8));
    border-radius: 50%;
    box-shadow: 
        0 0 15px rgba(59, 130, 246, 0.9),
        0 0 30px rgba(59, 130, 246, 0.6);
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation: particleGlow 2s ease-in-out infinite;
}

.orbit-2 .particle {
    background: radial-gradient(circle, rgba(8, 145, 178, 1), rgba(6, 182, 212, 0.8));
    box-shadow: 
        0 0 15px rgba(8, 145, 178, 0.9),
        0 0 30px rgba(8, 145, 178, 0.6);
}

.orbit-3 .particle {
    background: radial-gradient(circle, rgba(20, 184, 166, 1), rgba(6, 182, 212, 0.8));
    box-shadow: 
        0 0 15px rgba(20, 184, 166, 0.9),
        0 0 30px rgba(20, 184, 166, 0.6);
    width: 14px;
    height: 14px;
}

@keyframes particleGlow {
    0%, 100% { 
        transform: translateX(-50%) scale(1);
        opacity: 1;
    }
    50% { 
        transform: translateX(-50%) scale(1.3);
        opacity: 0.8;
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.4) 0%, rgba(30, 58, 138, 0.2) 50%, transparent 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--white);
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--white);
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.8;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.92);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 3rem;
}

/* ===== Buttons ===== */
.btn {
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-soft);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25);
    position: relative;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    transition: var(--transition);
    z-index: -1;
}

.btn-primary:hover::before {
    left: 0;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
}

.btn-small {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
    background: var(--gradient-soft);
    color: var(--white);
}

.btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

/* ===== About Section ===== */
.about {
    background: var(--light-color);
}

.about-content {
    display: grid;
    gap: 3rem;
}

.mission h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.mission p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.vision h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-soft);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 600;
}

/* ===== Activities Section ===== */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.activity-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid transparent;
}

.activity-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.activity-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: var(--transition);
}

.activity-card:hover .activity-icon {
    transform: scale(1.08);
}

/* Research Icon - Atom Symbol */
.icon-research {
    background: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.icon-research::before {
    content: '';
    position: absolute;
    width: 40px;
    height: 40px;
    border: 3px solid white;
    border-radius: 50%;
    opacity: 0.9;
}

.icon-research::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
}

/* Seminar Icon - Book */
.icon-seminar {
    background: linear-gradient(135deg, #0891b2 0%, #14b8a6 100%);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(8, 145, 178, 0.3);
}

.icon-seminar::before {
    content: '';
    position: absolute;
    width: 40px;
    height: 50px;
    border: 3px solid white;
    border-radius: 4px;
    border-left-width: 8px;
}

.icon-seminar::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: white;
    box-shadow: 
        0 8px 0 white,
        0 16px 0 white;
}

/* Site Visit Icon - Building */
.icon-site {
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(30, 58, 138, 0.3);
}

.icon-site::before {
    content: '';
    position: absolute;
    width: 40px;
    height: 45px;
    border: 3px solid white;
    border-radius: 4px 4px 0 0;
    border-bottom: none;
}

.icon-site::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 1px;
    box-shadow: 
        -10px -10px 0 white,
        0 -10px 0 white,
        10px -10px 0 white,
        -10px 0 0 white,
        10px 0 0 white,
        -10px 10px 0 white,
        0 10px 0 white,
        10px 10px 0 white;
}

/* Education Icon - Graduation Cap */
.icon-education {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.icon-education::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-bottom: 15px solid white;
    top: 25px;
}

.icon-education::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 4px;
    background: white;
    border-radius: 2px;
    top: 38px;
}

/* Network Icon - Connected Nodes */
.icon-network {
    background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

.icon-network::before {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: white;
    border-radius: 50%;
    box-shadow: 
        20px 0 0 white,
        -20px 0 0 white,
        0 20px 0 white;
}

.icon-network::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: white;
    transform: rotate(45deg);
    box-shadow: 
        0 0 0 2px white,
        14px -14px 0 0 white,
        -14px -14px 0 0 white;
    opacity: 0.7;
}

/* Global Icon - Earth */
.icon-global {
    background: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

.icon-global::before {
    content: '';
    position: absolute;
    width: 45px;
    height: 45px;
    border: 3px solid white;
    border-radius: 50%;
}

.icon-global::after {
    content: '';
    position: absolute;
    width: 3px;
    height: 45px;
    background: white;
    border-radius: 2px;
    box-shadow: 
        -15px 0 0 -1px white,
        15px 0 0 -1px white;
}

.activity-card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

/* ===== Events Section ===== */
.events {
    background: var(--light-color);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.event-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.event-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.event-date {
    background: var(--gradient-soft);
    color: var(--white);
    padding: 1.5rem;
    text-align: center;
}

.event-date .day {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    position: relative;
    z-index: 1;
}

.event-date .month {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 0.5rem;
    position: relative;
    z-index: 1;
}

.event-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.event-content h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.event-location,
.event-time {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.event-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
    flex: 1;
}

/* ===== Team Section ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.team-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
}

.team-card h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.team-role {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.team-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.team-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--light-color);
    color: var(--primary-color);
    transition: var(--transition);
}

.team-social a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.team-social svg {
    width: 20px;
    height: 20px;
}

/* ===== Contact Section ===== */
.contact {
    background: var(--light-color);
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
}

.contact-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    text-align: center;
}

.contact-icon-prof {
    width: 70px;
    height: 70px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-soft);
    border-radius: 50%;
    color: var(--white);
}

.contact-icon-prof svg {
    width: 40px;
    height: 40px;
    stroke: currentColor;
}

.contact-item h3 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

.social-links-prof {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
    justify-content: center;
}

.social-links-prof a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: 50%;
    color: var(--white);
    transition: var(--transition);
}

.social-links-prof a:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(8, 145, 178, 0.3);
}

.social-links-prof svg {
    width: 24px;
    height: 24px;
}

/* ===== Footer ===== */
.footer {
    background: var(--darker-color);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer p {
    margin: 0;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    section {
        padding: 60px 0;
    }

    .nuclear-orbits {
        width: 400px;
        height: 400px;
    }

    .orbit-1 {
        width: 150px;
        height: 150px;
        margin-left: -75px;
        margin-top: -75px;
    }

    .orbit-2 {
        width: 250px;
        height: 250px;
        margin-left: -125px;
        margin-top: -125px;
    }

    .orbit-3 {
        width: 350px;
        height: 350px;
        margin-left: -175px;
        margin-top: -175px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .activities-grid,
    .events-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 15px;
    }

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

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

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

/* ===== Animations ===== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.stat-card:hover .stat-number {
    animation: pulse 1s infinite;
}

/* ===== Smooth Scroll Offset ===== */
section[id] {
    scroll-margin-top: 80px;
}

/* ===== Accessibility ===== */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}