/* Global */
:root {
    --primary-color: #0a2647;
    --secondary-color: #144272;
    --accent-color: #205295;
    --light-color: #2c74b3;
    --text-color: #ffffff;
    --text-secondary: #e0e0e0;
    --background-dark: #051324;
    --background-light: #0c2d57;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    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-color);
    background-color: var(--background-dark);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
}

a:hover {
    color: var(--light-color);
}

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.primary-btn {
    background-color: var(--light-color);
    color: var(--text-color);
}

.primary-btn:hover {
    background-color: var(--accent-color);
    color: var(--text-color);
}

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

.secondary-btn:hover {
    background-color: var(--light-color);
    color: var(--text-color);
}

.small-btn {
    padding: 8px 15px;
    font-size: 0.9rem;
}

.login-btn {
    background-color: transparent;
    margin-right: 10px;
}

.signup-btn {
    background-color: var(--light-color);
}

section {
    padding: 80px 0;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 20px;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--light-color);
    margin: 15px auto;
    border-radius: 2px;
}

p {
    margin-bottom: 15px;
    color: var(--text-secondary);
}

.header {
    background-color: var(--primary-color);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.header.scrolled {
    padding: 15px 0;
    background-color: rgba(10, 38, 71, 0.95);
    backdrop-filter: blur(5px);
}

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

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
}

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

.navbar ul {
    display: flex;
}

.navbar ul li {
    margin-left: 30px;
}

.navbar ul li a {
    font-weight: 600;
    position: relative;
}

.navbar ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--light-color);
    bottom: -5px;
    left: 0;
    transition: var(--transition);
}

.navbar ul li a:hover::after,
.navbar ul li a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--background-light));
    padding: 150px 0 80px;
}

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

.hero-content {
    flex: 1;
    padding-right: 40px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-content h1 span {
    color: var(--light-color);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-image {
    flex: 1;
    animation: float 3s ease-in-out infinite;
}

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

.features {
    background-color: var(--background-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

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

.feature-card i {
    font-size: 2.5rem;
    color: var(--light-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.popular-courses {
    background-color: var(--background-light);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.course-card {
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

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

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

.course-info {
    padding: 20px;
}

.course-badge {
    display: inline-block;
    background-color: var(--light-color);
    color: var(--text-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    margin: 15px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.course-meta i {
    color: var(--light-color);
    margin-right: 5px;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.price {
    font-weight: 700;
    font-size: 1.1rem;
}

.price del {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-left: 5px;
}

.view-all {
    text-align: center;
    margin-top: 40px;
}

.testimonials {
    background-color: var(--background-dark);
}

.testimonial-slider {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.testimonial {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: var(--border-radius);
    margin: 0 20px;
    display: none;
}

.testimonial.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.testimonial p {
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.student-info {
    display: flex;
    align-items: center;
}

.student-info img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-right: 15px;
    object-fit: cover;
}

.slider-controls {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    gap: 15px;
}

.slider-btn {
    background-color: var(--light-color);
    color: var(--text-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.slider-btn:hover {
    background-color: var(--accent-color);
}

.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--background-light));
    text-align: center;
    padding: 60px 0;
}

.cta h2 {
    color: var(--text-color);
}

.cta p {
    max-width: 600px;
    margin: 0 auto 30px;
    color: var(--text-secondary);
}

.cta-light {
    background: var(--secondary-color);
}

.footer {
    background-color: var(--primary-color);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    position: relative;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 3px;
    background-color: var(--light-color);
    bottom: -10px;
    left: 0;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li i {
    margin-right: 10px;
    color: var(--light-color);
    width: 20px;
    text-align: center;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--light-color);
    transform: translateY(-5px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links a {
    margin-left: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.page-header {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--background-light));
    text-align: center;
}

.page-header h1 {
    font-size: 2.8rem;
}

.page-header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

.course-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
}

.category-btn {
    padding: 8px 20px;
    background-color: transparent;
    border: 1px solid var(--light-color);
    color: var(--text-color);
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
}

.category-btn:hover,
.category-btn.active {
    background-color: var(--light-color);
    color: var(--text-color);
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 40px;
    gap: 10px;
}

.page-btn {
    padding: 8px 15px;
    background-color: var(--secondary-color);
    color: var(--text-color);
    border-radius: 5px;
    transition: var(--transition);
}

.page-btn:hover,
.page-btn.active {
    background-color: var(--light-color);
}

.page-btn i {
    margin-left: 5px;
}

.database-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
}

.tab-btn {
    padding: 10px 25px;
    background-color: var(--secondary-color);
    color: var(--text-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.tab-btn:hover,
.tab-btn.active {
    background-color: var(--light-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

.database-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.database-card {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

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

.database-icon i {
    font-size: 2.5rem;
    color: var(--light-color);
    margin-bottom: 20px;
}

.database-card h3 {
    margin-bottom: 15px;
}

.concepts-list {
    margin-top: 30px;
}

.concept-item {
    background-color: var(--secondary-color);
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.concept-item h3 {
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
}

.concept-item h3 i {
    transition: var(--transition);
}

.concept-item h3.active i {
    transform: rotate(90deg);
}

.concept-content {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.concept-content.active {
    padding: 0 20px 20px;
    max-height: 500px;
}

.database-resources {
    background-color: var(--background-light);
    padding: 60px 0;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.resource-card {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.resource-card h3 {
    margin-bottom: 15px;
}

.resource-card .btn {
    margin-top: 15px;
}

/* Resources Page */
.resources-search {
    display: flex;
    max-width: 600px;
    margin: 0 auto 40px;
}

.resources-search input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.resources-search button {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.category-card {
    background-color: var(--secondary-color);
    padding: 30px 20px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
    background-color: var(--accent-color);
}

.category-card i {
    font-size: 2.5rem;
    color: var(--light-color);
    margin-bottom: 15px;
}

.category-card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.category-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.popular-resources {
    margin-top: 60px;
}

.resources-newsletter {
    background-color: var(--secondary-color);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-top: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-form {
    display: flex;
    max-width: 500px;
    margin: 30px auto 0;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    background-color: var(--background-dark);
    color: var(--text-color);
}

.newsletter-form button {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.resource-badge {
    display: inline-block;
    background-color: var(--light-color);
    color: var(--text-color);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.resource-meta {
    display: flex;
    justify-content: space-between;
    margin: 15px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.resource-meta i {
    color: var(--light-color);
    margin-right: 5px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.contact-info h2 {
    text-align: left;
}

.contact-info h2::after {
    margin: 15px 0;
}

.info-item {
    display: flex;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--light-color);
    margin-right: 20px;
    margin-top: 5px;
}

.contact-form {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: var(--border-radius);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--background-dark);
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.faq-section {
    background-color: var(--background-light);
    padding: 60px 0;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--secondary-color);
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
}

.faq-question i {
    transition: var(--transition);
}

.faq-question.active i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-answer.active {
    padding: 0 20px 20px;
    max-height: 500px;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 40px;
    }

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

@media (max-width: 768px) {
    .navbar {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--primary-color);
        transition: var(--transition);
    }

    .navbar.active {
        left: 0;
    }

    .navbar ul {
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
    }

    .navbar ul li {
        margin: 15px 0;
    }

    .mobile-menu-btn {
        display: block;
    }

    .auth-buttons {
        display: none;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    section {
        padding: 60px 0;
    }

    .page-header {
        padding: 120px 0 60px;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .btn {
        width: 100%;
    }

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

    .footer-links {
        margin-top: 15px;
    }

    .footer-links a {
        margin: 0 10px;
    }
}

/* Animations */
@keyframes slideInFromLeft {
    0% {
        transform: translateX(-100%);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInFromRight {
    0% {
        transform: translateX(100%);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInFromTop {
    0% {
        transform: translateY(-100%);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInFromBottom {
    0% {
        transform: translateY(100%);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}
/* Typing effect styles */
#typing-heading {
    color: #2c74b3; /* White text */
}

.typing-cursor {
    display: inline-block;
    margin-left: 3px;
    color: #2c74b3; /* White cursor */
    animation: blink 0.7s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}