/* Educational Platform Theme */
:root {
    /* Educational Color Palette */
    --primary: #4F46E5;        /* Indigo - Trust & Learning */
    --primary-light: #6366F1;
    --primary-dark: #4338CA;
    --secondary: #10B981;      /* Green - Success & Growth */
    --secondary-light: #34D399;
    --accent: #F59E0B;         /* Amber - Highlights */
    --accent-light: #FBBF24;
    
    /* Neutral Colors */
    --dark: #1F2937;
    --dark-light: #374151;
    --light: #F9FAFB;
    --white: #FFFFFF;
    --gray: #6B7280;
    --gray-light: #E5E7EB;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Educational Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10B981 0%, #059669 100%);
    --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    background-attachment: fixed;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-bottom: 3px solid var(--primary);
}

.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    position: relative;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 101;
}

.logo::before {
    content: "📚";
    font-size: 1.8rem;
}

.logo span {
    color: var(--secondary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 101;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.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(7px, -7px);
}

.main-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

/* Hero Section - Educational Style */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--white);
    line-height: 1.2;
}

.highlight {
    color: var(--white);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 12px;
    background: var(--accent);
    opacity: 0.3;
    z-index: -1;
}

.highlight-accent {
    color: var(--accent-light);
}

.lead {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

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

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn.outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn.outline:hover {
    background: var(--white);
    color: var(--primary);
}

/* Hero Image */
.hero-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 5px solid var(--white);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
}

.image-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: var(--accent);
    opacity: 0.2;
    border-radius: 30px;
    z-index: -1;
    filter: blur(40px);
}

/* About Section */
.about {
    padding: 6rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="dots" width="60" height="60" patternUnits="userSpaceOnUse"><circle cx="30" cy="30" r="2" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23dots)"/></svg>');
    opacity: 0.5;
}

.about .container {
    position: relative;
    z-index: 1;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--dark);
    position: relative;
    display: inline-block;
    width: 100%;
}

.about .section-title {
    color: var(--white);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-warm);
    border-radius: 2px;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.about-text h3 {
    font-size: 1.75rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.skills h4,
.contact-info h4 {
    font-size: 1.5rem;
    color: var(--dark);
    margin: 2rem 0 1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    padding: 0.5rem 1.25rem;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.skill-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-info p {
    color: var(--gray);
    margin-bottom: 0.5rem;
}

.contact-info strong {
    color: var(--dark);
}

/* Gallery Section */
.gallery {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    position: relative;
}

.gallery::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="80" height="80" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="waves" width="80" height="80" patternUnits="userSpaceOnUse"><path d="M0 40 Q20 20 40 40 T80 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="2"/></pattern></defs><rect width="100%" height="100%" fill="url(%23waves)"/></svg>');
    opacity: 0.4;
}

.gallery .container {
    position: relative;
    z-index: 1;
}

.gallery .section-title {
    color: var(--white);
}

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

.gallery-item {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.gallery-info {
    padding: 1.5rem;
}

.gallery-info h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.gallery-info p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Achievements Section */
.achievements {
    padding: 6rem 0;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    position: relative;
}

.achievements::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="stars" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1.5" fill="rgba(255,255,255,0.2)"/><circle cx="80" cy="40" r="1" fill="rgba(255,255,255,0.15)"/><circle cx="50" cy="80" r="1.2" fill="rgba(255,255,255,0.18)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23stars)"/></svg>');
    opacity: 0.6;
}

.achievements .container {
    position: relative;
    z-index: 1;
}

.achievements .section-title {
    color: var(--white);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.achievement-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.achievement-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.achievement-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary);
}

.achievement-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.achievement-card h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.achievement-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Portfolio Section */
.portfolio {
    padding: 6rem 0;
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    position: relative;
}

.portfolio::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="120" height="120" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="hexagons" width="120" height="120" patternUnits="userSpaceOnUse"><path d="M60 0 L90 30 L90 60 L60 90 L30 60 L30 30 Z" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="2"/></pattern></defs><rect width="100%" height="100%" fill="url(%23hexagons)"/></svg>');
    opacity: 0.3;
}

.portfolio .container {
    position: relative;
    z-index: 1;
}

.portfolio .section-title {
    color: var(--white);
}

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

.portfolio-item {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.portfolio-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.portfolio-info {
    padding: 1.5rem;
}

.portfolio-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gradient-success);
    color: var(--white);
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.portfolio-info h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.portfolio-tech {
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.portfolio-links {
    display: flex;
    gap: 0.75rem;
}

.portfolio-link {
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.portfolio-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.portfolio-link.secondary {
    background: var(--gray-light);
    color: var(--dark);
}

.portfolio-link.secondary:hover {
    background: var(--gray);
    color: var(--white);
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="circles" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="30" fill="none" stroke="rgba(255,255,255,0.15)" stroke-width="1.5"/><circle cx="50" cy="50" r="20" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23circles)"/></svg>');
    opacity: 0.5;
}

.contact .container {
    position: relative;
    z-index: 1;
}

.contact .section-title {
    color: var(--dark);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.contact-content p {
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.25rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.social-link:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-lg);
}

/* Footer */
footer {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="50" height="50" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="footer-pattern" width="50" height="50" patternUnits="userSpaceOnUse"><rect width="2" height="2" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23footer-pattern)"/></svg>');
}

footer .container {
    position: relative;
    z-index: 1;
}

footer p {
    color: rgba(255, 255, 255, 0.8);
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .main-nav {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .main-nav.active {
        display: flex;
        animation: slideDown 0.3s ease;
    }

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

    .nav-link {
        padding: 1rem;
        border-bottom: 1px solid var(--gray-light);
        text-align: center;
    }

    .nav-link::after {
        display: none;
    }

    .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .lead {
        font-size: 1rem;
    }

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

    .gallery-grid,
    .achievements-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .cta-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}