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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    line-height: 1.6;
    color: #333;
    padding: 20px;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
}

.container {
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 30px;
    text-align: center;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    font-weight: 700;
}

header p {
    font-size: 1.3em;
    opacity: 0.95;
}

.content {
    padding: 40px 30px;
}

section {
    margin-bottom: 60px;
}

.intro-section .hero-box {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    padding: 40px;
    border-radius: 15px;
    border-left: 5px solid #667eea;
    text-align: center;
}

.hero-box h2 {
    font-size: 2.2em;
    color: #667eea;
    margin-bottom: 15px;
}

.hero-box p {
    font-size: 1.2em;
    color: #555;
    line-height: 1.8;
    text-align: left;
}

h2 {
    font-size: 2.2em;
    color: #2d3748;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.icon {
    font-size: 1.2em;
}

.definition-box {
    background: #f7fafc;
    padding: 30px;
    border-radius: 12px;
    border-left: 5px solid #667eea;
    margin-bottom: 30px;
}

.definition-box p {
    font-size: 1.15em;
    color: #4a5568;
    line-height: 1.8;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

@media (max-width: 640px) {
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid #667eea;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.2);
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 1.4em;
    color: #2d3748;
    margin-bottom: 10px;
}

.feature-card p {
    color: #718096;
    line-height: 1.6;
}

.github-card {
    border-top-color: #24292e;
}

.info-box {
    background: linear-gradient(135deg, #667eea10 0%, #764ba210 100%);
    padding: 30px;
    border-radius: 12px;
    margin-top: 30px;
    border-left: 5px solid #667eea;
}

.info-box h4 {
    font-size: 1.5em;
    color: #667eea;
    margin-bottom: 20px;
}

.info-box ul {
    list-style: none;
    padding-left: 0;
}

.info-box li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: #4a5568;
    font-size: 1.05em;
}

.info-box li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 1.3em;
}

.github-info {
    border-left-color: #24292e;
}

.github-info h4 {
    color: #24292e;
}

.github-info li::before {
    color: #24292e;
}

.comparison-box {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 30px;
    align-items: center;
    margin: 30px 0;
    padding: 30px;
    background: #f7fafc;
    border-radius: 12px;
}

@media (max-width: 900px) {
    .comparison-box {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .vs-divider {
        transform: none;
        padding: 15px 0;
        margin: 10px 0;
        font-size: 2.5em;
        display: block;
        width: 100%;
        text-align: center;
    }
}

.comparison-item {
    text-align: center;
    padding: 20px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.comparison-item h3 {
    font-size: 1.8em;
    margin-bottom: 20px;
    color: #2d3748;
}

.comparison-item p {
    padding: 10px 0;
    color: #4a5568;
    font-size: 1.05em;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.vs-divider {
    font-size: 2em;
    font-weight: bold;
    color: #667eea;
    padding: 0 20px;
}

.workflow-diagram {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
    padding: 40px;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    border-radius: 12px;
}

.workflow-step {
    flex: 1;
    min-width: 150px;
    text-align: center;
    padding: 20px;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: bold;
    margin: 0 auto 15px;
}

.workflow-step h3 {
    font-size: 1.2em;
    color: #2d3748;
    margin-bottom: 10px;
}

.workflow-step p {
    color: #718096;
    margin-bottom: 10px;
    font-size: 0.95em;
}

.workflow-step code {
    background: #667eea;
    color: white;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.9em;
    display: inline-block;
    margin-top: 5px;
}

.workflow-arrow {
    font-size: 2em;
    color: #667eea;
    font-weight: bold;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.benefit-card {
    background: linear-gradient(135deg, #ffffff 0%, #f7fafc 100%);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.benefit-card:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.2);
}

.benefit-icon {
    font-size: 3em;
    margin-bottom: 15px;
}

.benefit-card h3 {
    font-size: 1.3em;
    color: #2d3748;
    margin-bottom: 10px;
}

.benefit-card p {
    color: #718096;
    line-height: 1.6;
}

.cta-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 50px 40px;
    border-radius: 15px;
    color: white;
    text-align: center;
}

.cta-box h3 {
    font-size: 2em;
    margin-bottom: 40px;
    color: white;
}

.learning-path {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.path-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 25px;
    border-radius: 12px;
    display: flex;
    gap: 15px;
    align-items: flex-start;
    text-align: left;
    transition: transform 0.3s ease;
}

.path-item:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}

.path-icon {
    font-size: 2.5em;
}

.path-item h4 {
    font-size: 1.2em;
    margin-bottom: 8px;
    color: white;
}

.path-item p {
    font-size: 0.95em;
    opacity: 0.9;
}

.start-button {
    margin-top: 20px;
}

.start-button p {
    font-size: 1.3em;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 15px 30px;
    border-radius: 8px;
    display: inline-block;
}

.tips-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.tip-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: all 0.3s ease;
}

.tip-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(102, 126, 234, 0.2);
}

.tip-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2em;
    flex-shrink: 0;
}

.tip-card p {
    color: #4a5568;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        border-radius: 10px;
    }

    .feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    header {
        padding: 30px 20px;
    }

    header h1 {
        font-size: 2em;
    }

    header p {
        font-size: 1.1em;
    }

    .content {
        padding: 25px 15px;
    }

    h2 {
        font-size: 1.7em;
        gap: 10px;
    }

    .hero-box {
        padding: 25px;
    }

    .hero-box h2 {
        font-size: 1.6em;
    }

    .hero-box p {
        font-size: 1.05em;
    }

    .definition-box {
        padding: 20px;
    }

    .definition-box p {
        font-size: 1.05em;
    }

    .feature-card {
        padding: 20px;
    }

    .info-box {
        padding: 20px;
    }

    .comparison-box {
        padding: 20px;
    }

    .workflow-diagram {
        flex-direction: column;
        padding: 25px 15px;
    }

    .workflow-arrow {
        transform: rotate(90deg);
        margin: 10px 0;
    }

    .workflow-step {
        min-width: 100%;
    }

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

    .learning-path {
        grid-template-columns: 1fr;
    }

    .tips-container {
        grid-template-columns: 1fr;
    }

    .cta-box {
        padding: 35px 20px;
    }
}

@media (max-width: 640px) {
    section {
        margin-bottom: 40px;
    }

    .feature-icon {
        font-size: 2.5em;
    }

    .benefit-icon {
        font-size: 2.5em;
    }

    .path-icon {
        font-size: 2em;
    }
}

@media (max-width: 480px) {
    .container {
        border-radius: 8px;
    }

    header {
        padding: 25px 15px;
    }

    header h1 {
        font-size: 1.6em;
        margin-bottom: 5px;
    }

    header p {
        font-size: 0.95em;
    }

    .content {
        padding: 20px 12px;
    }

    h2 {
        font-size: 1.5em;
        flex-direction: column;
        gap: 5px;
        align-items: flex-start;
    }

    .icon {
        font-size: 1em;
    }

    .hero-box {
        padding: 20px 15px;
    }

    .hero-box h2 {
        font-size: 1.4em;
    }

    .hero-box p {
        font-size: 0.95em;
    }

    .definition-box {
        padding: 15px;
    }

    .definition-box p {
        font-size: 0.95em;
    }

    .feature-card {
        padding: 20px 15px;
    }

    .feature-icon {
        font-size: 2.2em;
        margin-bottom: 10px;
    }

    .feature-card h3 {
        font-size: 1.2em;
    }

    .feature-card p {
        font-size: 0.95em;
    }

    .info-box {
        padding: 15px;
    }

    .info-box h4 {
        font-size: 1.3em;
    }

    .info-box li {
        font-size: 0.95em;
        padding-left: 25px;
    }

    .comparison-box {
        padding: 15px;
    }

    .comparison-item {
        padding: 15px;
    }

    .comparison-item h3 {
        font-size: 1.5em;
    }

    .comparison-item p {
        font-size: 0.95em;
    }

    .workflow-diagram {
        padding: 20px 10px;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.2em;
    }

    .workflow-step h3 {
        font-size: 1.1em;
    }

    .workflow-step p {
        font-size: 0.85em;
    }

    .workflow-step code {
        font-size: 0.8em;
        padding: 4px 10px;
    }

    .benefit-card {
        padding: 20px 15px;
    }

    .benefit-icon {
        font-size: 2.2em;
    }

    .benefit-card h3 {
        font-size: 1.15em;
    }

    .benefit-card p {
        font-size: 0.95em;
    }

    .cta-box {
        padding: 25px 15px;
    }

    .cta-box h3 {
        font-size: 1.4em;
        margin-bottom: 25px;
    }

    .path-item {
        padding: 20px 15px;
        gap: 12px;
    }

    .path-icon {
        font-size: 1.8em;
    }

    .path-item h4 {
        font-size: 1.1em;
    }

    .path-item p {
        font-size: 0.85em;
    }

    .start-button p {
        font-size: 1.1em;
        padding: 12px 20px;
    }

    .tip-card {
        padding: 15px;
        gap: 15px;
    }

    .tip-number {
        width: 35px;
        height: 35px;
        font-size: 1em;
    }

    .tip-card p {
        font-size: 0.95em;
    }
}

@media (max-width: 360px) {
    header h1 {
        font-size: 1.4em;
    }

    header p {
        font-size: 0.85em;
    }

    h2 {
        font-size: 1.3em;
    }

    .hero-box h2 {
        font-size: 1.2em;
    }

    .cta-box h3 {
        font-size: 1.2em;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    animation: fadeInUp 0.6s ease-out;
}