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

:root {
    /* Matrix-inspired color palette */
    --primary-blue: #00d4ff;
    --secondary-blue: #0099cc;
    --dark-blue: #001a2c;
    --darker-blue: #000d1a;
    --matrix-green: #00ff41;
    --light-blue: #4dc9ff;
    --accent-blue: #0080ff;
    --text-light: #e6f3ff;
    --text-gray: #b3d9ff;
    --border-blue: #0066cc;
    --shadow-blue: rgba(0, 212, 255, 0.1);
    --gradient-primary: linear-gradient(135deg, var(--dark-blue) 0%, var(--darker-blue) 100%);
    --gradient-accent: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--gradient-primary);
    color: var(--text-light);
    line-height: 1.6;
    font-size: 16px;
}

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

/* Header Styles */
.header {
    background: rgba(0, 26, 44, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--primary-blue);
    padding: 2rem 0;
    text-align: center;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

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

.logo i {
    font-size: 3rem;
    color: var(--primary-blue);
    animation: pulse 2s infinite;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.header-subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 600px;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-gray);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

/* Navigation Menu */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: rgba(0, 26, 44, 0.5);
    border: 2px solid var(--border-blue);
    border-radius: 12px;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    min-width: 200px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--shadow-blue);
}

.nav-link i {
    font-size: 2rem;
    color: var(--primary-blue);
}

/* Content Sections */
.content-section {
    margin-bottom: 4rem;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.section-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

.content-card {
    background: rgba(0, 26, 44, 0.3);
    border: 2px solid var(--border-blue);
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 2rem;
}

/* Explanation Text */
.explanation-text {
    margin-bottom: 2rem;
}

.explanation-text p {
    font-size: 1.1rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* Examples Section */
.examples-section {
    margin-bottom: 2rem;
}

.examples-section h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.examples-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.example-item {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--border-blue);
    border-radius: 8px;
    padding: 1.2rem;
    color: var(--text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.example-item:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

/* Uses Section */
.uses-section {
    margin-bottom: 2rem;
}

.uses-section h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.uses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.use-card {
    background: rgba(0, 26, 44, 0.5);
    border: 1px solid var(--border-blue);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.use-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-blue);
    border-color: var(--primary-blue);
}

.use-card i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.use-card h4 {
    color: var(--text-light);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.use-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 1rem;
}

/* Link Section */
.link-section {
    margin-bottom: 1rem;
}

.link-section h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.link-card {
    background: rgba(0, 26, 44, 0.5);
    border: 1px solid var(--border-blue);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
}

.link-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.app-info {
    font-size: 1rem;
    color: var(--text-gray);
    opacity: 0.8;
}

.external-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.external-link:hover {
    color: var(--light-blue);
    text-decoration: underline;
}

/* Aplicando Section */
.requirements-section {
    margin-bottom: 2rem;
}

.requirements-section h3 {
    color: var(--primary-blue);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.requirement-card {
    background: rgba(0, 26, 44, 0.5);
    border: 2px solid var(--border-blue);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.requirement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-blue);
    border-color: var(--primary-blue);
}

.requirement-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.requirement-icon i {
    font-size: 1.5rem;
    color: white;
}

.requirement-card h4 {
    color: var(--text-light);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.requirement-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.requirement-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary-blue);
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--primary-blue);
    font-weight: 600;
}

.tips-section {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--primary-blue);
    border-radius: 12px;
    padding: 1.5rem;
}

.tips-section h3 {
    color: var(--primary-blue);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tips-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tip-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.6;
}

.tip-item i {
    color: var(--primary-blue);
    font-size: 1.1rem;
    min-width: 20px;
}

/* Back to Top Button */
.back-to-top {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-blue);
}

.back-to-top .btn {
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.back-to-top .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-blue);
}

/* Ethics Section */
.ethics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.ethics-card {
    background: rgba(0, 26, 44, 0.5);
    border: 2px solid var(--border-blue);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.ethics-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-blue);
    border-color: var(--primary-blue);
}

.ethics-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.ethics-icon i {
    font-size: 2rem;
    color: white;
}

.ethics-card h3 {
    color: var(--text-light);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.ethics-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 1rem;
}

.ethics-note {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--primary-blue);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
}

.ethics-note h3 {
    color: var(--primary-blue);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.ethics-note p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 1.1rem;
}

/* Contact Section */
.contact-info {
    display: flex;
    justify-content: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(0, 26, 44, 0.5);
    border: 1px solid var(--border-blue);
    border-radius: 12px;
    min-width: 350px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--shadow-blue);
    border-color: var(--primary-blue);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-blue);
    min-width: 40px;
}

.contact-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.contact-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--light-blue);
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--darker-blue);
    border-top: 2px solid var(--border-blue);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-content {
    text-align: center;
    color: var(--text-gray);
}

.footer-content p {
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.footer-content a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-content a:hover {
    color: var(--light-blue);
}

/* Animations */
@keyframes pulse {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .logo i {
        font-size: 2.5rem;
    }
    
    .header-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .page-nav {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-link {
        width: 100%;
        max-width: 300px;
        flex-direction: row;
        justify-content: center;
        gap: 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-intro {
        font-size: 1.1rem;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .examples-list {
        grid-template-columns: 1fr;
    }
    
    .uses-grid {
        grid-template-columns: 1fr;
    }
    
    .ethics-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-item {
        min-width: auto;
        width: 100%;
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .logo i {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .content-card {
        padding: 1rem;
    }
    
    .explanation-text p {
        font-size: 1rem;
    }
    
    .use-card {
        padding: 1rem;
    }
    
    .use-card h4 {
        font-size: 1.1rem;
    }
    
    .use-card p {
        font-size: 0.95rem;
    }
    
    .ethics-card {
        padding: 1rem;
    }
    
    .ethics-card h3 {
        font-size: 1.2rem;
    }
    
    .ethics-card p {
        font-size: 0.95rem;
    }
    
    .ethics-icon {
        width: 60px;
        height: 60px;
    }
    
    .ethics-icon i {
        font-size: 1.5rem;
    }
}