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

:root {
    --primary-color: hsl(297, 70%, 50%);
    --primary-light: hsl(297, 70%, 60%);
    --primary-dark: hsl(297, 70%, 40%);
    --secondary-color: hsl(210, 100%, 60%);
    --accent-color: hsl(45, 100%, 60%);
    --text-primary: hsl(0, 0%, 20%);
    --text-secondary: hsl(0, 0%, 40%);
    --text-light: hsl(0, 0%, 60%);
    --bg-white: hsl(0, 0%, 100%);
    --bg-light: hsl(0, 0%, 98%);
    --bg-section: hsl(0, 0%, 96%);
    --border-light: hsl(0, 0%, 90%);
    --shadow-light: 0 2px 8px hsla(0, 0%, 0%, 0.1);
    --shadow-medium: 0 4px 16px hsla(0, 0%, 0%, 0.15);
    --border-radius: 8px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
}

[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .nav-menu {
    flex-direction: row-reverse;
}

[dir="rtl"] .hero-actions {
    flex-direction: row-reverse;
}

[dir="rtl"] .footer-contact p {
    text-align: right;
}

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

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

/* Header */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

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

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background-color: hsla(297, 70%, 50%, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 2px 0;
    border-radius: 2px;
    transition: 0.3s;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: var(--font-size-base);
}

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

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

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

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

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

.btn-outline:hover {
    background: var(--text-primary);
    color: white;
    border-color: var(--text-primary);
}

.btn-full {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-2xl) 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('/assets/bg-hero.svg');
    background-size: cover;
    background-position: center;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-description {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Sections */
.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.section-actions {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Features */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-section);
}

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

.feature-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: transform 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
}

/* Courses */
.featured-courses {
    padding: var(--spacing-2xl) 0;
}

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

.course-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all 0.2s ease;
    border: 1px solid var(--border-light);
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.course-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--bg-section);
}

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

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

.course-category {
    display: inline-block;
    background: hsla(297, 70%, 50%, 0.1);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.course-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.course-title a {
    text-decoration: none;
    color: inherit;
}

.course-title a:hover {
    color: var(--primary-color);
}

.course-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.course-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

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

.course-price {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
}

.course-instructor {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* Trust Section */
.trust-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-section);
}

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

.trust-item {
    text-align: center;
    padding: var(--spacing-lg);
}

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

.trust-item h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.trust-item p {
    color: var(--text-secondary);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    color: hsl(0, 70%, 50%);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

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

/* Checkout */
.checkout-header {
    background: var(--bg-section);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-light);
}

.checkout-steps {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.step {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-weight: 500;
}

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

.step.completed {
    background: hsl(120, 70%, 50%);
    color: white;
}

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

.checkout-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.checkout-form {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

.checkout-summary {
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    height: fit-content;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.summary-total {
    font-weight: 700;
    font-size: var(--font-size-lg);
    border-bottom: none;
    padding-top: var(--spacing-md);
}

.payment-icons {
    display: flex;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    justify-content: center;
}

.payment-icon {
    width: 40px;
    height: 25px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
}

/* Course Detail */
.course-detail {
    padding: var(--spacing-xl) 0;
}

.course-detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.course-detail-content h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.course-detail-meta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.course-detail-sidebar {
    background: var(--bg-section);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    height: fit-content;
}

.course-detail-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.course-detail-price {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.section {
    margin-bottom: var(--spacing-xl);
}

.section h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.curriculum-list,
.learning-list,
.requirements-list {
    list-style: none;
}

.curriculum-list li,
.learning-list li,
.requirements-list li {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.learning-list li:before,
.requirements-list li:before {
    content: "✓";
    color: hsl(120, 70%, 50%);
    font-weight: bold;
}

.curriculum-list li:before {
    content: "📹";
}

.faq-item {
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    background: var(--bg-section);
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: var(--spacing-md);
    display: none;
}

.faq-answer.active {
    display: block;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: hsla(0, 0%, 100%, 0.8);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-contact p {
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid hsla(0, 0%, 100%, 0.2);
    color: hsla(0, 0%, 100%, 0.6);
}

/* Search and Filter */
.search-filters {
    background: var(--bg-section);
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
}

.search-form {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-md);
    align-items: end;
}

.search-input {
    padding: var(--spacing-sm);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-medium);
        gap: var(--spacing-sm);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-description {
        font-size: var(--font-size-lg);
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .hero-actions .btn {
        width: 100%;
        max-width: 300px;
    }

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

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

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

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

    .course-detail-grid {
        grid-template-columns: 1fr;
    }

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

    .search-form {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .course-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

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

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

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

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

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

    .course-card {
        margin: 0;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}