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

:root {
    --bg-dark: #0f1419;
    --bg-card: #1a1f28;
    --bg-card-hover: #232936;
    --text-primary: #e6edf3;
    --text-secondary: #9198a1;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --border-color: #2d333b;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section */
.hero {
    background-image:
        linear-gradient(135deg, rgba(15, 20, 25, 0.85) 0%, rgba(26, 31, 40, 0.90) 100%),
        url('header.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 120px 20px 140px;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: #ffffff;
    line-height: 1.1;
    text-align: center;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5),
                 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #e6edf3;
    margin-bottom: 50px;
    line-height: 1.8;
    text-align: center;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-courses {
    margin-bottom: 50px;
}

.hero-courses-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 30px;
    text-align: center;
}

.course-links {
    display: grid;
    gap: 20px;
}

.course-link {
    display: flex;
    align-items: center;
    gap: 25px;
    padding: 25px 30px;
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.course-link:hover {
    border-color: var(--accent-blue);
    transform: translateX(8px);
    background-color: var(--bg-card-hover);
}

.course-link-coming:hover {
    border-color: #8b5cf6;
}

.course-link-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-blue);
    min-width: 60px;
}

.course-link-coming .course-link-number {
    color: #8b5cf6;
}

.course-link-content {
    flex: 1;
}

.course-link h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.course-link p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
}

.mini-badge {
    display: inline-block;
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    color: #ffffff;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-left: 10px;
}

.hero-cta {
    text-align: center;
    padding-top: 20px;
}

.btn-bundle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 30px 60px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

.btn-bundle:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(16, 185, 129, 0.4);
}

.btn-bundle-text {
    font-size: 1.5rem;
}

.btn-bundle-price {
    font-size: 2.5rem;
    font-weight: 800;
}

.original-price {
    font-size: 1.25rem;
    text-decoration: line-through;
    opacity: 0.7;
    font-weight: 500;
    margin-left: 10px;
}

.cta-note {
    margin-top: 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Course Section */
.course-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 50px;
    margin-bottom: 40px;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 50px;
    align-items: start;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-section:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.course-section.reverse {
    grid-template-columns: 400px 1fr;
}

.course-section.reverse .course-content {
    order: 2;
}

.course-section.reverse .course-video {
    order: 1;
}

/* Course Content */
.course-content {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.course-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.course-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.course-highlights h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.course-highlights ul {
    list-style: none;
    padding: 0;
}

.course-highlights li {
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    border-bottom: 1px solid var(--border-color);
}

.course-highlights li:last-child {
    border-bottom: none;
}

.course-highlights strong {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Course Meta */
.course-meta {
    display: flex;
    gap: 30px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.meta-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-value {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* Course Footer */
.course-footer {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-top: 10px;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-green);
}

.guarantee {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 10px;
}

/* Buttons */
.btn {
    padding: 16px 40px;
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background-color: var(--accent-green);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

/* Video Section */
.course-video {
    position: sticky;
    top: 20px;
}

.video-placeholder {
    background-color: var(--bg-dark);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    aspect-ratio: 9 / 16;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    text-align: center;
}

.video-placeholder p {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 600;
}

.video-placeholder span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Coming Soon Badge */
.coming-soon-badge {
    display: inline-block;
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    color: #ffffff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.course-section.coming-soon {
    border: 2px solid #8b5cf6;
}

/* Notify Form */
.notify-form {
    display: flex;
    gap: 15px;
    width: 100%;
    max-width: 500px;
}

.email-input {
    flex: 1;
    padding: 16px 20px;
    font-size: 1rem;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.3s ease;
}

.email-input:focus {
    border-color: var(--accent-green);
}

.email-input::placeholder {
    color: var(--text-secondary);
}

.form-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

/* Testimonials Section */
.testimonials-section {
    background-color: var(--bg-card);
    padding: 80px 20px;
    margin-top: 80px;
}

.testimonials-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 50px;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.testimonial-stars {
    font-size: 1.25rem;
    color: #fbbf24;
}

.testimonial-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #ffffff;
    font-size: 1.125rem;
}

.author-info {
    flex: 1;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.author-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* About Section */
.about-section {
    background-color: var(--bg-dark);
    padding: 80px 20px;
    margin-top: 0;
}

.about-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 50px;
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 50px;
    align-items: start;
    max-width: 1000px;
    margin: 0 auto;
}

.about-image {
    position: sticky;
    top: 20px;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.about-credentials {
    font-size: 1rem;
    color: var(--accent-blue);
    font-weight: 600;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.about-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-description:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 40px 20px;
    margin-top: 0;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.footer-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 10px auto 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .course-section,
    .course-section.reverse {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .course-section.reverse .course-content,
    .course-section.reverse .course-video {
        order: unset;
    }

    .course-video {
        position: relative;
        top: 0;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .course-link {
        flex-direction: row;
        gap: 15px;
        padding: 20px;
    }

    .course-link-number {
        font-size: 1.5rem;
        min-width: 50px;
    }

    .course-link h3 {
        font-size: 1.25rem;
    }

    .btn-bundle {
        padding: 25px 40px;
    }

    .btn-bundle-text {
        font-size: 1.25rem;
    }

    .btn-bundle-price {
        font-size: 2rem;
    }

    .course-section {
        padding: 30px 25px;
    }

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

    .course-meta {
        flex-direction: column;
        gap: 15px;
    }

    .course-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .notify-form {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

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

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .about-image {
        position: relative;
        top: 0;
        max-width: 300px;
        margin: 0 auto;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 60px 20px 80px;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-courses-title {
        font-size: 1.25rem;
    }

    .course-link {
        flex-direction: column;
        text-align: center;
    }

    .course-link h3 {
        font-size: 1.125rem;
    }

    .course-link p {
        font-size: 0.875rem;
    }

    .btn-bundle {
        padding: 20px 30px;
        width: 100%;
    }

    .btn-bundle-text {
        font-size: 1.125rem;
    }

    .btn-bundle-price {
        font-size: 1.75rem;
    }

    .original-price {
        font-size: 1rem;
    }

    .course-section {
        padding: 25px 20px;
    }

    .course-title {
        font-size: 1.75rem;
    }

    .price {
        font-size: 2rem;
    }

    .testimonials-section {
        padding: 60px 20px;
    }
}