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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, #059669, #10b981);
    color: white;
}
/* Sidebar Container */
.tutorial-sidebar {
    background: #ffffff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 90px;
    height: fit-content;
}

/* Sidebar Heading */
.tutorial-sidebar h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #059669;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5rem;
}

/* Sidebar Navigation */
.tutorial-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tutorial-nav li {
    margin-bottom: 0.8rem;
}

.tutorial-nav a {
    display: block;
    padding: 0.7rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    color: #374151;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* Hover Effect */
.tutorial-nav a:hover {
    background: #f0fdf4;
    color: #059669;
    transform: translateX(6px);
}

/* Active Link */
.tutorial-nav a.active {
    background: #059669;
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 10px rgba(5, 150, 105, 0.2);
}

/* Progress Section */
.tutorial-sidebar .progress-bar {
    border-radius: 6px;
    transition: width 0.4s ease;
}


.btn-primary:hover {
    background: linear-gradient(135deg, #047857, #059669);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #059669;
    border: 2px solid #059669;
}

.btn-outline:hover {
    background: #059669;
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* Navigation */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.logo {
    background: linear-gradient(135deg, #059669, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: #374151;
    font-weight: 500;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    color: #059669;
}

.dropdown {
    position: relative;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 1rem 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content a {
    display: block;
    padding: 0.5rem 1rem;
    color: #374151;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.dropdown-content a:hover {
    background-color: #f3f4f6;
    color: #059669;
}

.arrow {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.dropdown:hover .arrow {
    transform: rotate(180deg);
}

.nav-auth {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #374151;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #065f46 0%, #059669 50%, #10b981 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Stats Section */
.stats {
    padding: 60px 0;
    background: #f9fafb;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #059669;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: #6b7280;
    font-weight: 500;
}

/* Companies Section */
.companies {
    padding: 60px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #111827;
}

.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    align-items: center;
}

.company-logo {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: #6b7280;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.company-logo:hover {
    border-color: #059669;
    color: #059669;
    transform: translateY(-2px);
}

/* Featured Courses */
.featured-courses {
    padding: 80px 0;
    background: #f9fafb;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.course-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.course-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #111827;
}

.course-level {
    background: #059669;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.course-description {
    color: #6b7280;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.course-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: #6b7280;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #065f46, #059669);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: #111827;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #059669, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #d1d5db;
}

.footer-section p {
    color: #9ca3af;
    line-height: 1.6;
}

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

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

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

.footer-section ul li a:hover {
    color: #059669;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Tutorial Styles */
.tutorial-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    padding: 100px 0 60px;
    min-height: 100vh;
}

.tutorial-sidebar {
    background: #f9fafb;
    padding: 2rem;
    border-radius: 12px;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.tutorial-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.tutorial-nav ul {
    list-style: none;
}

.tutorial-nav ul li {
    margin-bottom: 0.5rem;
}

.tutorial-nav ul li a {
    color: #6b7280;
    text-decoration: none;
    display: block;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.tutorial-nav ul li a:hover,
.tutorial-nav ul li a.active {
    background: #059669;
    color: white;
}

.code-block {
    background: #1f2937;
    color: #e5e7eb;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow-x: auto;
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: #374151;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
}

.copy-btn:hover {
    background: #4b5563;
}

/* Course Styles */
.course-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid #e5e7eb;
    background: white;
    color: #6b7280;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.filter-btn:hover,
.filter-btn.active {
    border-color: #059669;
    background: #059669;
    color: white;
}

/* Cheatsheet Styles */
.cheatsheet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.cheatsheet-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.cheatsheet-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.cheatsheet-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.cheatsheet-item:last-child {
    border-bottom: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        gap: 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-auth {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .tutorial-layout {
        grid-template-columns: 1fr;
        padding-top: 80px;
    }
    
    .tutorial-sidebar {
        order: 2;
        position: static;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .companies-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
}