/* Global Variables - Comfortable Modern Palette */
:root {
    /* Premium Modern Palette */
    --primary-color: #0d9488;
    /* Teal 600 */
    --primary-dark: #134e4a;
    /* Teal 900 */
    --primary-light: #2dd4bf;
    /* Teal 400 */
    --secondary-color: #f0fdfa;
    /* Teal 50 */
    --accent-color: #f59e0b;
    /* Amber 500 - For highlights */

    --gradient-primary: linear-gradient(135deg, #0d9488 0%, #00bcd4 100%);
    --gradient-surface: linear-gradient(180deg, #ffffff 0%, #f9fafb 100%);

    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --border-color: #e2e8f0;

    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;

    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);

    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 32px;
    --border-radius-xl: 48px;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 48px;
    --spacing-xxl: 96px;

    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Glassmorphism Utility */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.section-spacing {
    padding: var(--spacing-xxl) 0;
}

@media (max-width: 1024px) {
    .section-spacing {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 480px) {
    .section-spacing {
        padding: var(--spacing-lg) 0;
    }
}

.benefit-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

@media (max-width: 768px) {
    .benefit-card {
        padding: var(--spacing-lg);
    }
}

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

html,
body {
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    line-height: 1.25;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background-color: #003347;
    color: white;
    opacity: 0.9;
}

.btn-primary:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);

}

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

.btn-secondary:hover {
    background-color: #ccfbf1;
    transform: translateY(-2px);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-10px);
    }

    100% {
        transform: translateY(0px);
    }
}

.reveal {
    opacity: 0;
    transition: all 0.8s ease-out;
    position: relative;
    z-index: 1;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Header */
.header {
    background: var(--surface-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.top-bar {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) 0;
    font-size: 0.875rem;
}

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

.main-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    max-width: 100%;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-item {
    position: relative;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--surface-color);
    min-width: 220px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
}

.nav-item:hover .dropdown-menu,
.nav-item.active .dropdown-menu {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0);
    z-index: 1000;
}

.dropdown-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    transition: background 0.2s ease;
}

.dropdown-item:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--spacing-xxl) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../assets/hero_learning_illustration_1768402790152.png') no-repeat center center;
    background-size: cover;
    opacity: 0.2;
    z-index: 0;
}

.hero-content {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero p {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero .btn-primary {
    background: white;
    color: var(--primary-color);
    padding: 16px 40px;
    font-size: 1.1rem;
}

.hero .btn-primary:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

.hero .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    padding: 16px 40px;
}

/* About Section */
.about {
    padding: var(--spacing-xxl) 0;
    position: relative;
    z-index: 1;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.about-image {
    position: relative;
}

.about-image-container {
    width: 100%;
    height: 500px;
    background: #E5E7EB;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9CA3AF;
    overflow: hidden;
}

.about-image-container img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

/* Courses Section */
.courses {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.course-card {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.course-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

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

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-info {
    padding: var(--spacing-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.course-info h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.course-link {
    margin-top: auto;
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* Video Section */
.video-section {
    padding: var(--spacing-xxl) 0;
    background: var(--primary-color);
    color: white;
}

.video-section h2 {
    color: white;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.video-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 */
    height: 0;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-features ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.video-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.1rem;
}

.check-icon {
    width: 24px;
    height: 24px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* Testimonials */
.testimonials {
    padding: var(--spacing-xxl) 0;
    background: var(--surface-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background: var(--bg-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.testimonial-author {
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}


/* Footer */
.footer {
    background: #b5dbda;
    /* Darker than primary */
    color: #017270;
    padding: var(--spacing-xl) 0;
    font-size: 0.9rem;
}

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

/* Mobile Menu Button - Hidden on Desktop */
.mobile-menu-btn {
    display: none;
}

/* Responsive */
/* Responsive */
@media (max-width: 1024px) {
    :root {
        --spacing-xxl: 64px;
        --spacing-xl: 32px;
    }

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

    .container {
        padding: 0 var(--spacing-lg);
    }

    .main-nav .container {
        height: 80px;
        position: relative;
    }

    .logo img {
        height: 60px !important;
    }

    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--secondary-color);
        border: none;
        font-size: 2rem;
        color: var(--primary-color);
        cursor: pointer;
        order: 3;
        z-index: 1100;
        width: 44px;
        height: 44px;
        border-radius: var(--border-radius-sm);
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--surface-color);
        padding: 80px var(--spacing-lg) var(--spacing-lg);
        box-shadow: var(--shadow-xl);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        gap: 0;
        overflow-y: auto;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-item {
        width: 100%;
        text-align: left;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-item a {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 0;
        font-size: 1.1rem;
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        min-width: 100%;
        background: var(--bg-color);
        border-radius: 0;
    }

    .nav-item.active .dropdown-menu {
        display: block !important;
    }

    .nav-item.active>a ion-icon[name="chevron-down-outline"] {
        transform: rotate(180deg);
    }

    .nav-item a ion-icon[name="chevron-down-outline"] {
        transition: transform 0.3s ease;
    }

    .header .btn-primary {
        display: none;
    }

    /* Hero adjustments */
    .hero {
        padding: var(--spacing-xl) 0;
        min-height: auto;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .cta-group {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-md);
        padding: 0 var(--spacing-md);
    }

    .cta-group .btn {
        width: 100%;
        margin: 0 !important;
    }

    /* Layout Grids */
    .about-grid,
    .video-container,
    .testimonials-grid,
    .pricing-tab-content.active,
    .book-detail-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .about-text h2,
    .section-title {
        font-size: 2rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .mobile-only {
        display: block !important;
    }

    .desktop-only {
        display: none !important;
    }

    .about-image-container {
        height: 280px;
    }
}

@media (max-width: 480px) {
    .top-bar .social-links {
        display: none;
    }

    .top-bar .container {
        justify-content: center;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .logo img {
        height: 50px !important;
    }

    .pricing-tabs {
        flex-direction: column;
        align-items: stretch;
    }
}



/* Book Detail Grid */
.book-detail-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 50px;
    align-items: start;
}

/* Pricing Page Styles */
.pricing-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xxl);
}

.pricing-tab-btn {
    padding: 16px 32px;
    border: none;
    border-radius: var(--border-radius-md);
    background: var(--primary-dark);
    color: white;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.pricing-tab-btn.active {
    background: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.pricing-tab-content {
    display: none;
}

.pricing-tab-content.active {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.pricing-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.pricing-card-header {
    background: #234d4e;
    color: white;
    padding: 24px;
    text-align: center;
    font-weight: 800;
}

.pricing-card-price {
    background: var(--primary-color);
    color: white;
    padding: 16px;
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.pricing-card-details {
    padding: 24px;
    text-align: center;
    flex-grow: 1;
}

.pricing-card-footer {
    background: #f8fafc;
    padding: 16px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    font-weight: 600;
}

.pricing-notice {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 0.95rem;
}