/* Global Styles */
:root {
    --primary-color: #4a6bff;
    --secondary-color: #ff6b6b;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Poppins', sans-serif;
    overflow-x: hidden;
}

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--light-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Navbar */
.navbar {
    transition: var(--transition);
    padding: 1rem 0;
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--secondary-color) !important;
}

/* Hero Section */
.hero-section {
    padding-top: 80px;
    background: linear-gradient(135deg, var(--light-color) 0%, #e6f3ff 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="%234a6bff" opacity="0.1"/></svg>') repeat;
    opacity: 0.1;
    animation: float 20s linear infinite;
}

.hero-section h1 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.hero-section .lead {
    color: var(--text-color);
    font-size: 1.25rem;
}

/* Statistics Section */
.statistics-section {
    background: var(--light-color);
    position: relative;
}

.stat-card {
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    transform: translateY(0);
}

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

.stat-card i {
    color: var(--primary-color);
    background: rgba(74, 107, 255, 0.1);
    padding: 1rem;
    border-radius: 50%;
    transition: var(--transition);
}

.stat-card:hover i {
    transform: scale(1.1);
    background: var(--primary-color);
    color: white;
}

/* Features Section */
.feature-card {
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card i {
    color: var(--primary-color);
    transition: var(--transition);
}

.feature-card:hover i {
    transform: scale(1.2);
}

/* Course Cards */
.course-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    transform-style: preserve-3d;
    perspective: 1000px;
}

.course-card:hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.course-card img {
    transition: var(--transition);
}

.course-card:hover img {
    transform: scale(1.1);
}

/* Team Section */
.team-card {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.team-card img {
    width: 100%;
    transition: var(--transition);
}

.team-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    transform: translateY(100%);
    transition: var(--transition);
}

.team-card:hover .team-info {
    transform: translateY(0);
}

.team-card:hover img {
    transform: scale(1.1);
}

/* Testimonials */
.testimonial {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    margin: 1rem;
    position: relative;
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 20px;
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.2;
}

/* Buttons */
.btn {
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: scaleX(0);
    transition: var(--transition);
}

.btn:hover::after {
    transform: scaleX(1);
}

.pulse-animation {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.float-animation {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

/* Scroll to Top Button */
#scrollToTop {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
}

#scrollToTop.visible {
    opacity: 1;
    visibility: visible;
}

#scrollToTop:hover {
    transform: translateY(-5px);
    background: var(--secondary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .stat-card, .feature-card, .course-card, .team-card {
        margin-bottom: 1.5rem;
    }
    
    .team-info {
        transform: translateY(0);
        background: rgba(0, 0, 0, 0.7);
    }
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-in;
}

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