:root {
    --color-dark-blue: #0A1931;
    --color-dark-blue-alt: #1A2B4C;
    --color-teal: #00C897;
    --color-white: #FFFFFF;
    --color-gray-light: #F0F0F0;
    --color-gray-text: rgba(255, 255, 255, 0.8);
    
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    --container-max-width: 1200px;
    --section-padding: 80px 20px;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-dark-blue);
    color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

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

ul {
    list-style: none;
}

.header {
    background-color: var(--color-dark-blue);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--color-white);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-teal);
    border-radius: 8px;
    position: relative;
}

.logo-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-35%, -50%);
    width: 0;
    height: 0;
    border-left: 12px solid var(--color-dark-blue);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

.nav {
    position: relative;
}

.menu-toggle {
    display: none;
}

.menu-icon {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

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

.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
}



.nav-list {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: var(--color-white);
    font-size: 16px;
    transition: color 0.3s;
}

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

.btn {
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: #00B885;
    transform: translateY(-2px);
}

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

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

.hero {
    background: var(--color-dark-blue);
    padding: var(--section-padding);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    border: 2px solid var(--color-teal);
    border-radius: 30px;
    color: var(--color-teal);
    font-size: 14px;
    margin-bottom: 30px;
    font-weight: 600;
}

.hero h1 {
    font-size: 56px;
    font-weight: bold;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--color-white) !important;
}

.hero h1 .highlight {
    color: var(--color-teal) !important;
}

.hero p {
    font-size: 18px;
    color: var(--color-white) !important;
    margin-bottom: 30px;
    line-height: 1.8;
    opacity: 0.95 !important;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-images {
    position: relative;
    height: 500px;
}

.hero-images img {
    position: absolute;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s;
}

.hero-images img:nth-child(1) {
    top: 0;
    left: 0;
    width: 45%;
    z-index: 3;
}

.hero-images img:nth-child(2) {
    top: 10%;
    right: 0;
    width: 45%;
    z-index: 2;
}

.hero-images img:nth-child(3) {
    bottom: 0;
    left: 15%;
    width: 40%;
    z-index: 3;
}

.hero-images img:nth-child(4) {
    bottom: 10%;
    right: 15%;
    width: 35%;
    z-index: 4;
}

.hero-images img:hover {
    transform: translateY(-10px) scale(1.05);
    z-index: 10;
}

.section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 20px;
}

.section-header h2 .highlight {
    color: var(--color-teal);
}

.section-header p {
    font-size: 18px;
    color: var(--color-gray-text);
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    justify-items: center;
}

@media (max-width: 480px) {
    .features {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

.feature-card {
    background: var(--color-dark-blue-alt);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--color-teal);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--color-gray-text);
    line-height: 1.8;
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.two-column.reverse {
    direction: rtl;
}

.two-column.reverse > * {
    direction: ltr;
}

.content-image img {
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.content-text h2 {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 20px;
}

.content-text h2 .highlight {
    color: var(--color-teal);
}

.content-text p {
    font-size: 18px;
    color: var(--color-gray-text);
    margin-bottom: 30px;
    line-height: 1.8;
}

.content-list {
    list-style: none;
}

.content-list li {
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.content-list li:last-child {
    border-bottom: none;
}

.content-list li::before {
    content: '✓';
    color: var(--color-teal);
    font-size: 24px;
    font-weight: bold;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    justify-items: center;
}

@media (max-width: 480px) {
    .course-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

.course-card {
    background: var(--color-dark-blue-alt);
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.3s;
}

.course-card:hover {
    transform: translateY(-10px);
}

.course-image {
    height: 200px;
    background: var(--color-gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-content {
    padding: 30px;
}

.course-content h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.course-content p {
    color: var(--color-gray-text);
    margin-bottom: 20px;
    line-height: 1.8;
}

.cta {
    background: var(--color-dark-blue-alt);
    padding: var(--section-padding);
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    color: var(--color-gray-text);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer {
    background: var(--color-dark-blue);
    padding: 60px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.footer-text {
    color: var(--color-gray-text);
    margin-bottom: 20px;
    line-height: 1.8;
}

.footer-copyright {
    color: var(--color-gray-text);
    font-size: 14px;
}

.footer-right {
    text-align: right;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
    justify-content: flex-end;
}

.footer-links a {
    color: var(--color-gray-text);
    transition: color 0.3s;
}

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

@media (max-width: 768px) {
    .menu-icon {
        display: flex;
    }
    
    .menu-toggle:checked ~ .nav-overlay {
        display: block;
        opacity: 1;
    }
    
    .menu-toggle:checked ~ .nav-list {
        right: 0;
    }
    
    .menu-toggle:checked ~ .menu-icon span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .menu-toggle:checked ~ .menu-icon span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle:checked ~ .menu-icon span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }
    
    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: var(--color-dark-blue-alt);
        flex-direction: column;
        padding: 80px 30px 30px;
        transition: right 0.4s ease-in-out;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.7);
        z-index: 1000;
        overflow-y: auto;
    }
    
    .nav-list li {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-link {
        display: block;
        padding: 15px 0;
        font-size: 18px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero-images {
        height: 300px;
    }
    
    .two-column {
        grid-template-columns: 1fr;
    }
    
    .section-header h2 {
        font-size: 32px;
    }
    
    .content-text h2 {
        font-size: 32px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-right {
        text-align: left;
    }
    
    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .nav-list {
        width: 100%;
        max-width: 100%;
        padding: 80px 20px 20px;
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .feature-card {
        max-width: 100%;
    }
    
    .course-card {
        max-width: 100%;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .section {
        padding: 60px 20px;
    }
    
    .cta h2 {
        font-size: 28px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

@media (max-width: 320px) {
    .logo-text {
        font-size: 16px;
    }
    
    .nav-list {
        padding: 70px 15px 15px;
    }
    
    .nav-link {
        font-size: 16px;
    }
}