/* Custom CSS for Nerdcode Website */

:root {
    --primary-color: #2196f3;
    --secondary-color: #6a1b9a;
    --accent-color: #9c27b0;
    --dark-bg: #0d1117;
    --darker-bg: #010409;
    --card-bg: rgba(255, 255, 255, 0.05);
    --text-light: #f0f6fc;
    --text-muted: #8b949e;
    --gradient-primary: linear-gradient(135deg, #2196f3 0%, #6a1b9a 100%);
    --gradient-secondary: linear-gradient(135deg, #6a1b9a 0%, #9c27b0 100%);
    --gradient-accent: linear-gradient(135deg, #1a237e 0%, #2196f3 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Text gradient utility */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.navbar {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

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

.nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    background: var(--gradient-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

/* Buttons */
.btn-primary {
    background: var(--gradient-primary);
    border: none;
    font-weight: 600;
    padding: 12px 30px;
    border-radius: 50px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(33, 150, 243, 0.3);
}

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--text-light);
    font-weight: 600;
    padding: 12px 30px;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(33, 150, 243, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(156, 39, 176, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 2rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 400;
    line-height: 1.6;
}

.hero-buttons {
    margin-top: 2rem;
}

/* AI Visualization */
.hero-image {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-visualization {
    position: relative;
    width: 400px;
    height: 400px;
}

.ai-node {
    position: absolute;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.ai-node i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.ai-node span {
    font-size: 0.8rem;
}

.central-node {
    width: 120px;
    height: 120px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--gradient-secondary);
    animation: pulse 2s infinite;
}

.node-1 {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    animation: float 3s ease-in-out infinite;
}

.node-2 {
    width: 80px;
    height: 80px;
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    animation: float 3s ease-in-out infinite 0.5s;
}

.node-3 {
    width: 80px;
    height: 80px;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    animation: float 3s ease-in-out infinite 1s;
}

.node-4 {
    width: 80px;
    height: 80px;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    animation: float 3s ease-in-out infinite 1.5s;
}

.ai-node:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(33, 150, 243, 0.3);
}

/* Animations */
@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.05); }
}

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

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* About Section */
.about-section {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
}

.stat-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Services Section */
.services-section {
    background: var(--dark-bg);
}

.service-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

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

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.service-description {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.service-benefits {
    list-style: none;
    padding: 0;
}

.service-benefits li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.service-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Process Section */
.process-section {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.process-step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Why Choose Us Section */
.why-section {
    background: var(--dark-bg);
}

.feature-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-secondary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 1.8rem;
    color: white;
}

.feature-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* How It Works Section */
.how-section {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
}

.how-card {
    text-align: center;
    padding: 1.5rem;
}

.how-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.how-card h5 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.how-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Benefits Section */
.benefits-section {
    background: var(--dark-bg);
}

.benefit-item {
    padding: 1rem 0;
}

.benefit-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.benefit-icon i {
    font-size: 1.2rem;
    color: white;
}

.benefit-item h5 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.benefit-item p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(33, 150, 243, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-buttons {
    position: relative;
    z-index: 2;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

.footer-contact a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-contact a:hover {
    color: var(--primary-color);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.copyright a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

.copyright a:hover {
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .ai-visualization {
        width: 300px;
        height: 300px;
    }
    
    .central-node {
        width: 100px;
        height: 100px;
    }
    
    .ai-node {
        width: 60px;
        height: 60px;
    }
    
    .ai-node i {
        font-size: 1.2rem;
    }
    
    .ai-node span {
        font-size: 0.7rem;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .cta-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .service-card,
    .feature-card,
    .stat-card {
        margin-bottom: 1rem;
    }
}

/* Loading Animation */
.loading {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.loading.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}