/* Root variables for colors */
:root {
    --color-background: #0A192F;
    --color-primary: #64FFDA;
    --color-accent-pink: #FF007F;
    --color-accent-green: #00E676;
    --color-text: #FFFFFF;
    --color-code-background: #1C2D41;
    --color-code-text: #64FFDA;
    --color-card: #1C2D41;
    --font-family: 'Roboto', sans-serif;
}

/* Global Styles */
body {
    margin: 0;
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--color-background), #1C2D41);
    color: var(--color-text);
    line-height: 1.6;
    padding: 0;
    overflow-x: hidden;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-pink));
    padding: 2rem 1rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    color: var(--color-background);
}

nav a {
    color: var(--color-text);
    margin: 0 1rem;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--color-accent-green);
}

/* Hero Section */
.hero {
    background: radial-gradient(circle, rgba(10,25,47,1) 0%, rgba(0,0,0,1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
    opacity: 0.3;
}

.hero-content {
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 0 1rem;
}

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.hero-content a {
    background-color: var(--color-accent-green);
    color: var(--color-background);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.hero-content a:hover {
    background-color: var(--color-accent-pink);
    transform: scale(1.05);
}

/* Features Section */
.features {
    padding: 4rem 1rem;
    background: var(--color-background);
}

.features h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--color-primary);
}

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

.feature-card {
    background: var(--color-card);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-pink));
}

.feature-card img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--color-text);
}

.feature-card p {
    color: #cccccc;
}

/* Example Showcase */
.showcase {
    padding: 4rem 1rem;
    background: #1C2D41;
}

.showcase h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--color-accent-green);
}

.showcase article {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
    background: var(--color-background);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.showcase h2, .showcase h3 {
    color: var(--color-primary);
}

.showcase p {
    margin-bottom: 1rem;
}

.showcase pre {
    background: var(--color-code-background);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.showcase code {
    color: var(--color-code-text);
    font-family: 'Courier New', Courier, monospace;
}

/* Images Section */
.images-section {
    padding: 4rem 1rem;
}

.images-section h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--color-accent-pink);
}

.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.images-grid img {
    width: 100%;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.images-grid img:hover {
    transform: scale(1.05);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--color-accent-pink), var(--color-accent-green));
    padding: 1rem;
    text-align: center;
    color: var(--color-background);
}

footer p {
    margin: 0;
    font-size: 1rem;
}

/* Responsive Design */
@media (max-width: 1440px) {
    .hero-content h2 {
        font-size: 2.5rem;
    }
}

@media (max-width: 1200px) {
    .features .container {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 1024px) {
    .hero-content h2 {
        font-size: 2rem;
    }
    .feature-card {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero {
        height: 70vh;
    }
    .hero-content h2 {
        font-size: 1.5rem;
    }
    .features .container {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }
    nav a {
        margin: 0 0.5rem;
        font-size: 0.9rem;
    }
    .hero-content h2 {
        font-size: 1.2rem;
    }
    .feature-card {
        padding: 1rem;
    }
    .showcase article {
        padding: 0.5rem;
    }
}

@media (max-width: 320px) {
    header h1 {
        font-size: 1.5rem;
    }
}