/* Modern Learning Platform Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-purple: #667eea;
    --secondary-purple: #764ba2;
    --dark-purple: #5a67d8;
    --light-purple: #a78bfa;
    --accent-purple: #8b5cf6;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #a78bfa 0%, #667eea 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #ffffff;
    --shadow-light: 0 4px 15px rgba(102, 126, 234, 0.1);
    --shadow-medium: 0 8px 25px rgba(102, 126, 234, 0.15);
    --shadow-heavy: 0 15px 35px rgba(102, 126, 234, 0.2);
    --border-radius: 16px;
    --border-radius-small: 8px;
    --border-radius-large: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --animation-bounce: bounce 2s infinite;
    --animation-float: float 3s ease-in-out infinite;
    --animation-pulse: pulse 2s infinite;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--gradient-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-30px); }
    60% { transform: translateY(-15px); }
}

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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes rotateFloat {
    0% { transform: rotate(0deg) translateY(0px); }
    33% { transform: rotate(120deg) translateY(-10px); }
    66% { transform: rotate(240deg) translateY(-5px); }
    100% { transform: rotate(360deg) translateY(0px); }
}

@keyframes coinFall {
    0% {
        transform: translateY(-100px) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(400px) rotate(360deg);
        opacity: 0;
    }
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    animation: slideInUp 0.8s ease-out;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-purple);
}

.logo-icon {
    font-size: 2rem;
    animation: var(--animation-pulse);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

.nav-link:hover {
    color: var(--primary-purple);
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

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

.btn-outline:hover {
    background: var(--primary-purple);
    color: white;
    transform: translateY(-3px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 700;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-icon {
    font-size: 1.2rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 2rem 80px;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 2;
    animation: slideInUp 1s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 50px;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeInScale 1.2s ease-out;
}

.badge-icon {
    font-size: 1.2rem;
    animation: var(--animation-pulse);
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    animation: slideInUp 1.4s ease-out;
}

.gradient-text {
    background: linear-gradient(45deg, #fbbf24, #f59e0b, #d97706);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: var(--animation-pulse);
}

.hero-description {
    font-size: 1.3rem;
    opacity: 0.9;
    margin-bottom: 2.5rem;
    animation: slideInUp 1.6s ease-out;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    animation: slideInUp 1.8s ease-out;
}

.stat-item {
    text-align: center;
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    animation: var(--animation-float);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: slideInUp 2s ease-out;
}

/* Hero Visual */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    animation: fadeInScale 1.5s ease-out;
}

.floating-platform {
    position: relative;
    width: 400px;
    height: 400px;
}

.platform-base {
    width: 200px;
    height: 200px;
    background: linear-gradient(145deg, #8b5cf6, #a78bfa);
    border-radius: 20px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    animation: var(--animation-float);
}

.floating-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: var(--transition);
}

.floating-icon:hover {
    transform: scale(1.2) rotate(10deg);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.math-icon {
    top: 10%;
    left: 20%;
    animation: var(--animation-float) 3s ease-in-out infinite;
}

.english-icon {
    top: 20%;
    right: 10%;
    animation: var(--animation-float) 3.5s ease-in-out infinite reverse;
}

.science-icon {
    bottom: 30%;
    left: 10%;
    animation: var(--animation-float) 4s ease-in-out infinite;
}

.code-icon {
    bottom: 20%;
    right: 20%;
    animation: var(--animation-float) 3.2s ease-in-out infinite reverse;
}

.art-icon {
    top: 50%;
    left: 5%;
    animation: var(--animation-float) 2.8s ease-in-out infinite;
}

.brain-icon {
    top: 50%;
    right: 5%;
    animation: var(--animation-float) 3.8s ease-in-out infinite reverse;
}

/* Coin Rain */
.coin-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.coin {
    position: absolute;
    font-size: 2rem;
    animation: coinFall 4s linear infinite;
}

.coin:nth-child(1) { left: 20%; animation-delay: 0s; }
.coin:nth-child(2) { left: 40%; animation-delay: 1s; }
.coin:nth-child(3) { left: 60%; animation-delay: 2s; }
.coin:nth-child(4) { left: 80%; animation-delay: 3s; }
.coin:nth-child(5) { left: 30%; animation-delay: 0.5s; }

/* Achievement Badges */
.achievement-badge {
    position: absolute;
    font-size: 3rem;
    animation: rotateFloat 6s ease-in-out infinite;
}

.badge-1 {
    top: 15%;
    left: 50%;
    animation-delay: 0s;
}

.badge-2 {
    top: 60%;
    left: 30%;
    animation-delay: 2s;
}

.badge-3 {
    top: 70%;
    right: 30%;
    animation-delay: 4s;
}

/* Features Section */
.features-section {
    padding: 80px 2rem;
    background: white;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    animation: slideInUp 0.8s ease-out;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-light);
    border: 1px solid rgba(102, 126, 234, 0.1);
    transition: var(--transition);
    animation: fadeInScale 1s ease-out;
}

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

.feature-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: var(--animation-pulse);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

/* Learning Paths */
.learning-paths {
    padding: 80px 2rem;
    background: var(--gradient-light);
}

.paths-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.learning-path {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 2px solid transparent;
    animation: slideInUp 1s ease-out;
}

.learning-path:hover {
    transform: translateY(-5px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-medium);
}

.path-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: var(--animation-float);
}

.path-levels {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 1rem 0;
}

.level-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #e2e8f0;
    transition: var(--transition);
}

.level-dot.active {
    background: var(--gradient-primary);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

/* Services Overview */
.services-overview {
    padding: 80px 2rem;
    background: var(--gradient-primary);
    color: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.service-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    animation: fadeInScale 1s ease-out;
}

.service-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.2);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: var(--animation-pulse);
}

/* CTA Section */
.cta-section {
    padding: 80px 2rem;
    background: var(--gradient-dark);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
    z-index: 2;
    position: relative;
}

.cta-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: var(--animation-bounce);
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    pointer-events: none;
}

.floating-rewards {
    position: relative;
    width: 100%;
    height: 100%;
}

.reward-item {
    position: absolute;
    font-size: 3rem;
    animation: var(--animation-float);
}

.reward-item:nth-child(1) { top: 20%; right: 10%; animation-delay: 0s; }
.reward-item:nth-child(2) { top: 40%; right: 30%; animation-delay: 1s; }
.reward-item:nth-child(3) { top: 60%; right: 20%; animation-delay: 2s; }
.reward-item:nth-child(4) { top: 80%; right: 40%; animation-delay: 3s; }

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 10000;
    animation: fadeInScale 0.3s ease-out;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-heavy);
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close {
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    border: none;
    background: none;
}

.close:hover {
    color: var(--primary-purple);
    transform: scale(1.1);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius-small);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.form-footer a {
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    
    .nav-link {
        display: none;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 100px 1rem 60px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-visual {
        margin-top: 3rem;
    }
    
    .floating-platform {
        width: 300px;
        height: 300px;
    }
    
    .platform-base {
        width: 150px;
        height: 150px;
    }
    
    .floating-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .features-grid,
    .paths-container,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Tooltip */
[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    z-index: 1000;
}

/* Performance Optimizations */
.hero-visual *,
.floating-icon,
.coin,
.achievement-badge,
.reward-item {
    will-change: transform;
}

/* Focus States for Accessibility */
.btn:focus,
.nav-link:focus,
input:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}