/* Root Variables */
:root {
    --primary-color: #1E40AF;
    --secondary-color: #1E3A8A;
    --accent-color: #3B82F6;
    --dark-bg: #1F2937;
    --light-bg: #F3F4F6;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --white: #FFFFFF;
    --success: #10B981;
    --warning: #F59E0B;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Header */
.header {
    background: var(--dark-bg);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    transition: color 0.3s;
}

.logo i {
    color: var(--accent-color);
    font-size: 1.75rem;
}

.logo:hover {
    color: var(--accent-color);
}

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

.nav-link {
    color: var(--white);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

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

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--white);
    transition: all 0.3s;
}

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

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 50%, #3B82F6 100%);
    padding: 140px 0 80px;
    color: var(--white);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    text-align: left;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    display: block;
    color: #93C5FD;
    font-size: 2.5rem;
    margin-top: 0.5rem;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-features {
    display: flex;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.hero-feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
}

.hero-feature-item i {
    font-size: 1.25rem;
    color: #93C5FD;
}

.hero-image {
    position: relative;
    height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-border {
    position: absolute;
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px;
    border: 2px solid;
    border-image: linear-gradient(135deg, #3B82F6, #93C5FD) 1;
    border-radius: 20px;
    pointer-events: none;
    z-index: 1;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(147, 197, 253, 0.2));
    border-radius: 25px;
    filter: blur(20px);
    z-index: 0;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4);
    position: relative;
    z-index: 2;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

/* Section Styles */
section {
    padding: 80px 0;
}

.section-badge {
    display: inline-block;
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

/* About Section */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 12px;
    width: 100%;
    height: 600px;
    object-fit: cover;
    box-shadow: var(--shadow-lg);
}

.experience-badge {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(30, 64, 175, 0.4);
}

.experience-badge .years {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.experience-badge .text {
    display: block;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

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

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2.5rem 0;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 12px;
}

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

.stat-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-item h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.stat-item p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.about-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-dark);
    font-weight: 500;
}

.about-features i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Subjects Section */
.subjects {
    background: var(--light-bg);
    text-align: center;
}

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

.subject-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
}

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

.subject-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

.subject-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.subject-level {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.subject-topics {
    text-align: left;
    padding-left: 1.5rem;
}

.subject-topics li {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    position: relative;
}

.subject-topics li::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -1.5rem;
}

/* Achievements Section */
.achievements {
    background: var(--white);
    text-align: center;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.achievement-card {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    padding: 2.5rem;
    border-radius: 12px;
    color: var(--white);
    box-shadow: 0 8px 20px rgba(30, 64, 175, 0.3);
}

.achievement-icon {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
}

.achievement-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.achievement-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

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

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

.achievement-list p {
    text-align: left;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.achievement-list i {
    color: rgba(255, 255, 255, 0.9);
}

/* Contact Section */
.contact {
    background: var(--light-bg);
    text-align: center;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.contact-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.contact-link {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    transition: color 0.3s;
}

.contact-link:hover {
    color: var(--accent-color);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-logo i {
    color: var(--accent-color);
    font-size: 1.75rem;
}

.footer-col p {
    color: #9CA3AF;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-col ul li {
    color: #9CA3AF;
    transition: color 0.3s;
}

.footer-col ul li:hover {
    color: var(--accent-color);
}

.footer-col ul li a {
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--accent-color);
}

.footer-col ul li i {
    color: var(--accent-color);
    margin-right: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: #9CA3AF;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #9CA3AF;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-color);
}

/* Scroll to Top Button */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.4);
    z-index: 999;
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.5);
}

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

.animate-on-scroll {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.animate-on-scroll:nth-child(2) {
    animation-delay: 0.1s;
}

.animate-on-scroll:nth-child(3) {
    animation-delay: 0.2s;
}

.animate-on-scroll:nth-child(4) {
    animation-delay: 0.3s;
}

.animate-on-scroll:nth-child(5) {
    animation-delay: 0.4s;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 2rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .hero-text {
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-features {
        justify-content: center;
    }

    .hero-image {
        height: 500px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--dark-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 1.5rem;
    }

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

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-text {
        text-align: center;
    }

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

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
    }

    .hero-features {
        justify-content: center;
        gap: 1.5rem;
    }

    .hero-image {
        height: 400px;
    }

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

    .subjects-grid,
    .achievements-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .about-image img {
        height: 400px;
    }

    .experience-badge {
        bottom: 20px;
        right: 20px;
        padding: 1rem;
    }

    .experience-badge .years {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}