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

:root {
    /* Color Palette - Reading-friendly colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #22c55e;

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Typography */
    --font-arabic: 'Cairo', sans-serif;
    --font-english: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* 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), 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-arabic);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    direction: rtl;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
    font-size: clamp(0.9rem, 1.8vw, 1rem);
    line-height: 1.5;
}

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

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

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: clamp(1rem, 2.2vw, 1.125rem);
}

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

.navbar {
    padding: var(--spacing-md) 0;
    background-color: #c7daf7;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.logo-img {
    height: 40px;
    width: auto;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: color var(--transition-normal);
}

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

.lang-toggle {
    background-color: var(--gray-100);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: none;
}

.lang-toggle:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--gray-700);
    margin: 3px 0;
    transition: var(--transition-normal);
}

.nav-toggle.active .bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-title-main {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
}

.hero-title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.9;
    font-family: var(--font-english);
}

.hero-description {
    font-size: 1rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-color);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-video-container {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.hero-image,
.hero-video {
    width: 100%;
    height: auto;
    display: block;
}

.hero-video {
    cursor: pointer;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

/* Problem/Solution Section */
.problem-solution {
    padding: var(--spacing-3xl) 0;
    background-color: var(--gray-50);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: 2.5rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.problem-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-normal);
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.solution-section {
    margin-top: var(--spacing-3xl);
}

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

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

.solution-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    border-top: 4px solid var(--secondary-color);
    transition: transform var(--transition-normal);
}

.solution-card:hover {
    transform: translateY(-5px);
}

.solution-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

/* Value Proposition Section */
.value-proposition {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.value-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.value-title {
    font-size: 2.5rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xl);
}

.value-points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.value-point {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.value-point-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.value-point-content h3 {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.value-point-content p {
    color: var(--gray-600);
    margin: 0;
}

.value-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Instructors Section */
.instructors {
    padding: var(--spacing-3xl) 0;
    background-color: var(--gray-50);
}

.instructors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.instructor-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.instructor-card:hover {
    transform: translateY(-5px);
}

.instructor-image {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-xl) 0;
}

.instructor-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.instructor-info {
    padding: var(--spacing-xl);
}

.instructor-name {
    font-size: 1.5rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.instructor-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.instructor-credentials {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.credential {
    background-color: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.instructor-bio {
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.instructor-stats {
    display: flex;
    gap: var(--spacing-lg);
}

.instructor-stats .stat {
    text-align: center;
}

.instructor-stats .stat-number {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.instructor-stats .stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Testimonials Section */
.testimonials {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.testimonial-card {
    background-color: var(--gray-50);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.testimonial-rating {
    margin-bottom: var(--spacing-md);
}

.stars {
    color: var(--accent-color);
    font-size: 1.25rem;
}

.testimonial-text {
    font-style: italic;
    color: var(--gray-700);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.author-photo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.author-title {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin: 0;
}

.success-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card .stat-number {
    font-size: 3rem;
    font-weight: 800;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.stat-card .stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Courses Section */
.courses {
    padding: var(--spacing-3xl) 0;
    background-color: var(--gray-50);
}

.course-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--gray-300);
    background-color: var(--white);
    color: var(--gray-700);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.course-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-image {
    position: relative;
    overflow: hidden;
}

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

.course-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--white);
}

.course-badge.free {
    background-color: var(--secondary-color);
}

.course-badge.popular {
    background-color: var(--accent-color);
}

.course-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-footer {
    margin-top: auto;
}

.course-title {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.course-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.course-details {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--gray-600);
}

.course-details>div {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.course-syllabus {
    margin-bottom: var(--spacing-md);
}

.course-syllabus h4 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.course-syllabus ul {
    list-style: none;
    padding-right: var(--spacing-md);
}

.course-syllabus li {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-right: 1.5em;
}

.course-syllabus li::before {
    content: "✓";
    color: var(--secondary-color);
    font-weight: bold;
    position: absolute;
    right: 0;
}

.price-original {
    text-decoration: line-through;
    color: var(--gray-400);
    font-size: 0.875rem;
}

.price-current {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.course-cta {
    width: 100%;
    font-size: clamp(0.875rem, 1.8vw, 1rem);
}

/* FAQ Section */
.faq {
    padding: var(--spacing-3xl) 0;
    background-color: var(--white);
}

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

.faq-item {
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-md);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: background-color var(--transition-normal);
}

.faq-question:hover {
    background-color: var(--gray-50);
}

.faq-question h3 {
    margin: 0;
    color: var(--gray-900);
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

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

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--gray-600);
    line-height: 1.6;
}

/* Final CTA Section */
.final-cta {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.cta-guarantee {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.cta-guarantee p {
    margin: 0;
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-logo-img {
    height: 40px;
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--gray-300);
    line-height: 1.6;
}

.footer-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--gray-300);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

.contact-info {
    margin-bottom: var(--spacing-md);
    direction: ltr;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--gray-300);
}

.contact-icon {
    font-size: 1.25rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--gray-800);
    color: var(--white);
    text-decoration: none;
    border-radius: 50%;
    transition: all var(--transition-normal);
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-xl);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-link {
        font-size: 0.95rem;
    }

    .footer-links a {
        font-size: 0.9rem;
    }

    .course-cta {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(8px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        transition: right var(--transition-normal), opacity var(--transition-normal);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg) var(--spacing-md);
        overflow-y: auto;
        opacity: 0;
        border-top: 3px solid var(--primary-color);
    }

    .nav-menu.active {
        right: 0;
        opacity: 1;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-lg);
        padding-top: var(--spacing-xl);
        width: 100%;
        max-width: 600px;
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        display: block;
        width: 100%;
        padding: var(--spacing-md) var(--spacing-xl);
        border-radius: var(--radius-md);
        color: var(--gray-800);
        background-color: transparent;
        transition: background-color var(--transition-normal), transform var(--transition-fast), color var(--transition-normal);
    }

    .nav-link:hover {
        background-color: var(--gray-100);
        color: var(--primary-color);
    }

    .nav-link:active {
        transform: scale(0.98);
    }

    .nav-link.active {
        background-color: var(--gray-100);
        color: var(--primary-color);
        font-weight: 700;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-title-main {
        font-size: 2rem;
        line-height: 1.8;
    }

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

    .value-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-guarantee {
        flex-direction: column;
        text-align: center;
    }

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

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

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

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

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

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

    .navbar {
        padding: var(--spacing-sm) 0;
    }

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

    .logo-img {
        height: 32px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background-color: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(8px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        transition: right var(--transition-normal), opacity var(--transition-normal);
        box-shadow: var(--shadow-lg);
        z-index: 999;
        padding: var(--spacing-lg) var(--spacing-sm);
        overflow-y: auto;
        opacity: 0;
        border-top: 3px solid var(--primary-color);
    }

    .nav-menu.active {
        right: 0;
        opacity: 1;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-md);
        padding-top: var(--spacing-md);
        width: 100%;
        text-align: center;
        max-width: 540px;
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        display: block;
        width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
        border-radius: var(--radius-md);
        font-size: 1.05rem;
    }

    .nav-link.active {
        background-color: var(--gray-100);
        color: var(--primary-color);
        font-weight: 700;
    }

    .hero {
        padding: 80px 0 40px;
        min-height: auto;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
        padding: 0 var(--spacing-sm);
    }

    .hero-title-main {
        font-size: 1.5rem;
        line-height: 1.3;
        margin-bottom: var(--spacing-sm);
    }

    .hero-title-sub {
        font-size: 1rem;
        margin-bottom: var(--spacing-md);
    }

    .hero-description {
        font-size: 0.9rem;
        margin-bottom: var(--spacing-md);
        line-height: 1.5;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }

    .stat {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .stat-number {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-xs);
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .btn {
        width: 100%;
        max-width: 280px;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.9rem;
    }

    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }

    h1 {
        font-size: 1.75rem;
        line-height: 1.3;
    }

    h2 {
        font-size: 1.5rem;
        line-height: 1.3;
    }

    h3 {
        font-size: 1.25rem;
        line-height: 1.3;
    }

    .section-title {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-md);
        line-height: 1.3;
    }

    .section-subtitle {
        font-size: 1rem;
        line-height: 1.4;
    }

    .problem-solution {
        padding: var(--spacing-xl) 0;
    }

    .problems-grid,
    .solution-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .problem-card,
    .solution-card {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-sm);
    }

    .problem-icon,
    .solution-icon {
        font-size: 2.5rem;
        margin-bottom: var(--spacing-sm);
    }

    .solution-title {
        font-size: 1.2rem;
        margin-bottom: var(--spacing-md);
    }

    .value-proposition {
        padding: var(--spacing-xl) 0;
    }

    .value-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .value-title {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-md);
        line-height: 1.3;
    }

    .value-points {
        gap: var(--spacing-md);
    }

    .value-point {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }

    .value-point-icon {
        font-size: 1.5rem;
    }

    .instructors {
        padding: var(--spacing-xl) 0;
    }

    .instructors-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .instructor-card {
        margin-bottom: var(--spacing-sm);
    }

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

    .instructor-photo {
        width: 120px;
        height: 120px;
    }

    .instructor-info {
        padding: var(--spacing-lg);
    }

    .instructor-name {
        font-size: 1.25rem;
        margin-bottom: var(--spacing-xs);
    }

    .instructor-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }

    .testimonials {
        padding: var(--spacing-xl) 0;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .testimonial-card {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-sm);
    }

    .success-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .success-stat {
        padding: var(--spacing-md);
    }

    .success-stat-number {
        font-size: 1.5rem;
    }

    .courses {
        padding: var(--spacing-xl) 0;
    }

    .course-filters {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-lg);
    }

    .filter-btn {
        width: 100%;
        max-width: 200px;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .course-card {
        margin-bottom: var(--spacing-sm);
    }

    .course-content {
        padding: var(--spacing-lg);
    }

    .course-title {
        font-size: 1.1rem;
        line-height: 1.3;
    }

    .course-description {
        font-size: 0.9rem;
        line-height: 1.4;
    }

    .course-details {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: flex-start;
    }

    .faq {
        padding: var(--spacing-xl) 0;
    }

    .faq-question {
        padding: var(--spacing-md);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .faq-question h3 {
        font-size: 1rem;
        line-height: 1.3;
    }

    .faq-answer p {
        padding: 0 var(--spacing-md) var(--spacing-md);
        font-size: 0.9rem;
        line-height: 1.4;
    }

    .final-cta {
        padding: var(--spacing-xl) 0;
    }

    .cta-title {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-md);
        line-height: 1.3;
    }

    .cta-description {
        font-size: 1rem;
        margin-bottom: var(--spacing-lg);
        line-height: 1.4;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .cta-guarantee {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }

    .cta-guarantee p {
        font-size: 0.8rem;
    }

    .footer {
        padding: var(--spacing-xl) 0 var(--spacing-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-title {
        font-size: 1.1rem;
        margin-bottom: var(--spacing-sm);
    }

    .footer-description {
        font-size: 0.9rem;
        line-height: 1.4;
    }

    .contact-info {
        text-align: center;
    }

    .contact-item {
        justify-content: center;
        font-size: 0.9rem;
    }

    .social-links {
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .social-link {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .footer-bottom {
        padding-top: var(--spacing-md);
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all var(--transition-slow);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all var(--transition-slow);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.course-card.hidden {
    display: none;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.btn:focus,
.nav-link:focus,
.filter-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

@media print {

    .header,
    .nav-toggle,
    .hero-cta,
    .course-cta,
    .final-cta,
    .footer {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    .hero {
        background: none;
        color: var(--gray-900);
    }
}

/* YouTube Section (from inline block) */
.youtube-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.youtube-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
}

.youtube-video-wrapper {
    width: 100%;
    max-width: 900px;
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.video-container-youtube {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 12px;
}

.video-container-youtube iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 12px;
}

.youtube-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 900px;
}

.youtube-stat-card {
    background: white;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.youtube-stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.2);
}

.youtube-stat-card .stat-icon {
    font-size: 48px;
    line-height: 1;
}

.youtube-stat-card .stat-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.youtube-stat-card .stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    line-height: 1;
}

.youtube-stat-card .stat-label {
    font-size: 16px;
    color: #64748b;
    margin: 0;
    font-weight: 500;
}

.youtube-cta {
    margin-top: 20px;
}

.youtube-cta .btn {
    padding: 16px 48px;
    font-size: 18px;
    background: linear-gradient(135deg, #FF0000 0%, #CC0000 100%);
    border: none;
    box-shadow: 0 4px 20px rgba(255, 0, 0, 0.3);
}

.youtube-cta .btn:hover {
    background: linear-gradient(135deg, #CC0000 0%, #990000 100%);
    box-shadow: 0 8px 30px rgba(255, 0, 0, 0.4);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .youtube-section {
        padding: 60px 0;
    }

    .youtube-stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .youtube-stat-card {
        padding: 24px 20px;
    }

    .youtube-stat-card .stat-number {
        font-size: 28px;
    }

    .youtube-video-wrapper {
        padding: 12px;
    }
}

/* Graduation Project (from inline block) */
.graduation-project {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.graduation-project::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"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    opacity: 0.3;
}

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

.graduation-project .section-header {
    margin-bottom: 60px;
}

.graduation-project .section-title,
.graduation-project .section-subtitle {
    color: white;
}

.project-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 60px;
    align-items: start;
    background: white;
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    direction: ltr;
}

.project-image-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.project-image-wrapper:hover {
    transform: scale(1.05);
}

.project-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
}

.project-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(245, 87, 108, 0.4);
}

.project-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.project-title {
    font-size: 32px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-subtitle {
    font-size: 18px;
    color: #64748b;
    margin: 0;
    font-weight: 500;
    text-align: right;
}

.project-description {
    line-height: 1.8;
    color: #475569;
    font-size: 16px;
    text-align: right;
}

.project-description p {
    margin: 0;
}

.project-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-item {
    display: flex;
    gap: 12px;
    align-items: start;
    padding: 16px;
    background: #f8fafc;
    border-radius: 12px;
    transition: all 0.3s ease;
    direction: rtl;
    text-align: right;
}

.feature-item:hover {
    background: #f1f5f9;
    transform: translateX(-5px);
}

.feature-icon {
    font-size: 28px;
    line-height: 1;
}

.feature-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin: 0 0 4px 0;
}

.feature-text p {
    font-size: 14px;
    color: #64748b;
    margin: 0;
}

.project-tech-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.project-tech-stack h4 {
    font-size: 16px;
    font-weight: 600;
    color: #1e293b;
    margin: 0 0 12px 0;
    text-align: center;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.tech-tag {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

@media (max-width: 1024px) {
    .project-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .project-image-wrapper {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .graduation-project {
        padding: 60px 0;
    }

    .project-content {
        padding: 24px;
    }

    .project-title {
        font-size: 24px;
    }

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

    .project-badge {
        top: 12px;
        right: 12px;
        font-size: 12px;
        padding: 6px 12px;
    }
}

/* Modals, Contact, Toast, Scroll Top (from JS-injected CSS) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.modal-content {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
    padding: 10px;
}

.modal-video {
    max-width: 400px;
    width: 100%;
}

@media (min-width: 768px) {
    .modal-video {
        max-width: 600px;
    }
}

@media (min-width: 1024px) {
    .modal-video {
        max-width: 800px;
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
    margin: 0;
    color: var(--gray-900);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

.modal-close:hover {
    background-color: var(--gray-100);
    color: var(--gray-700);
}

.modal-body {
    padding: 0;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--gray-700);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-normal);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-options {
    display: grid;
    gap: var(--spacing-lg);
}

.contact-option {
    text-align: center;
    padding: var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.contact-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.contact-option .contact-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.contact-option h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

.contact-option p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.video-container {
    position: relative;
    text-align: center;
}

.video-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.success-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: var(--success-color);
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 10001;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.success-toast.show {
    transform: translateX(0);
}

.success-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.success-icon {
    font-size: 1.25rem;
}

.scroll-top-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

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

.scroll-top-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }

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

/* Performance: avoid offscreen rendering cost */
.problem-solution,
.instructors,
.courses,
.testimonials,
.value-proposition,
.youtube-section,
.graduation-project,
.faq {
    content-visibility: auto;
    contain-intrinsic-size: 600px;
}

/* Respect Reduced Motion preferences */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}