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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.5rem;
    color: #2563eb;
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #374151;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2563eb;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    gap: 1rem;
}

.btn-secondary {
    padding: 0.5rem 1rem;
    border: 1px solid #d1d5db;
    background: transparent;
    color: #374151;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
}

.btn-primary {
    padding: 0.5rem 1rem;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #374151;
}

/* Hero Section */
.hero {
    padding: 8rem 2rem 4rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 1.5rem;
}

.badge-new {
    background: #ef4444;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-text {
    font-weight: 500;
    color: #374151;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.highlight {
    color: #2563eb;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    border-radius: 2px;
}

.hero-description {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stat i {
    color: #2563eb;
    font-size: 1.25rem;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
}

.stat-label {
    color: #6b7280;
    font-size: 0.875rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-primary-large {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.btn-primary-large:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(37, 99, 235, 0.5);
}

.btn-contact {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.39);
}

.btn-contact:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(16, 185, 129, 0.5);
}

.hero-visual {
    position: relative;
}

.hero-image-container {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

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

.floating-card {
    position: absolute;
    background: white;
    padding: 1rem;
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    color: #2563eb;
    font-size: 1.25rem;
}

.card-1 {
    top: 20%;
    right: -10%;
    animation-delay: 0s;
}

.card-2 {
    top: 60%;
    left: -10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    right: -5%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.25rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #f3f4f6;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border-color: #2563eb;
}

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.feature-description {
    color: #6b7280;
    line-height: 1.6;
}

/* Courses Section */
.courses {
    padding: 6rem 0;
    background: #f8fafc;
}

.course-showcase {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.course-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    position: relative;
}

.course-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.badge-update {
    background: #10b981;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.course-image {
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    padding: 3rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.course-robot {
    width: 200px;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
}

.course-tools {
    position: absolute;
    bottom: 2rem;
    left: 2rem;
    display: flex;
    gap: 1rem;
}

.tool-icon {
    width: 3rem;
    height: 3rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    /* transition: all 0.3s ease; */
}

.tool-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.course-content {
    padding: 2rem;
}

.course-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.course-subtitle {
    color: #6b7280;
    font-weight: 500;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.course-features {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6b7280;
    font-size: 0.875rem;
}

.feature-item i {
    color: #2563eb;
}

.course-modules h4 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-weight: 600;
}

.modules-list {
    list-style: none;
}

.modules-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid #f3f4f6;
    color: #374151;
}

.modules-list li:last-child {
    border-bottom: none;
}

.modules-list i {
    color: #2563eb;
}

.duration {
    margin-left: auto;
    color: #6b7280;
    font-size: 0.875rem;
}

.course-pricing {
    position: sticky;
    top: 6rem;
}

.price-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    border: 1px solid #f3f4f6;
}

.price-header {
    text-align: center;
    margin-bottom: 2rem;
}

.price-label {
    color: #6b7280;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.price {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.price-old {
    color: #9ca3af;
    text-decoration: line-through;
    font-size: 1.25rem;
}

.price-current {
    color: #1f2937;
    font-size: 2.5rem;
    font-weight: 700;
}

.btn-enroll {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.btn-enroll:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.btn-contact-large {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

.btn-contact-large:hover {
    background: #059669;
    transform: translateY(-1px);
}

.instructor-info {
    display: flex;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid #f3f4f6;
}

.instructor-avatar {
    flex-shrink: 0;
}

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

.instructor-details h4 {
    color: #1f2937;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.instructor-details p {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.instructor-stats {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.instructor-stats span {
    color: #6b7280;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.instructor-stats i {
    color: #2563eb;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-details h4 {
    color: #1f2937;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-details p {
    color: #6b7280;
}

.form {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid #e5e7eb;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.btn-submit {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.footer-brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #3b82f6;
}

.footer-description {
    color: #9ca3af;
    line-height: 1.6;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    color: white;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-column li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: #3b82f6;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 2.5rem;
    height: 2.5rem;
    background: #374151;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #3b82f6;
    color: white;
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .course-showcase {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        padding: 6rem 1rem 3rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary-large,
    .btn-contact {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .floating-card {
        display: none;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .course-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .price {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .price-current {
        font-size: 2rem;
    }
}


/* Course Tabs Styles */
.course-tabs {
    margin-top: 2rem;
}

.tab-buttons {
    display: flex;
    border-bottom: 2px solid #e5e7eb;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 1rem 2rem;
    background: none;
    border: none;
    color: #6b7280;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: #2563eb;
    border-bottom-color: #2563eb;
}

.tab-btn:hover {
    color: #2563eb;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.course-description {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
    border-left: 4px solid #2563eb;
}

.course-description p {
    color: #374151;
    line-height: 1.6;
    margin: 0;
}

.module-section {
    margin-bottom: 2rem;
}

.module-title {
    color: #1f2937;
    font-weight: 600;
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: #374151;
    color: white;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.modules-list {
    list-style: none;
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.modules-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-bottom: 1px solid #f3f4f6;
    color: #374151;
    transition: background-color 0.3s ease;
}

.modules-list li:hover {
    background: #f8fafc;
}

.modules-list li:last-child {
    border-bottom: none;
}

.modules-list i {
    color: #2563eb;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.modules-list span:first-of-type {
    flex: 1;
    font-weight: 500;
}

.duration {
    margin-left: auto;
    color: #6b7280;
    font-size: 0.875rem;
    font-weight: 500;
    background: #f3f4f6;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.free-badge {
    background: #10b981;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

/* Reviews Section */
.reviews-section h4 {
    color: #1f2937;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.review-item {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    border-left: 4px solid #10b981;
}

.review-rating {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
}

.review-rating i {
    color: #fbbf24;
    font-size: 1rem;
}

.review-item p {
    color: #374151;
    line-height: 1.6;
    margin-bottom: 0.5rem;
    font-style: italic;
}

.reviewer {
    color: #6b7280;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Contact Instructor Section */
.contact-instructor h4 {
    color: #1f2937;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 0.5rem;
    border-left: 4px solid #2563eb;
}

.contact-method i {
    color: #2563eb;
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
}

.contact-method span {
    color: #374151;
    font-weight: 500;
}

/* Instructor Experience */
.instructor-experience {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
}

.instructor-experience p {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

/* Mobile Responsive for Tabs */
@media (max-width: 768px) {
    .tab-buttons {
        flex-direction: column;
    }
    
    .tab-btn {
        padding: 0.75rem 1rem;
        text-align: left;
        border-bottom: 1px solid #e5e7eb;
        border-right: none;
    }
    
    .tab-btn.active {
        background: #f3f4f6;
        border-left: 4px solid #2563eb;
        border-bottom: 1px solid #e5e7eb;
    }
    
    .modules-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .modules-list span:first-of-type {
        margin-bottom: 0.5rem;
    }
    
    .duration,
    .free-badge {
        align-self: flex-end;
    }
    
    .contact-methods {
        gap: 0.75rem;
    }
    
    .contact-method {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        text-align: left;
    }
}