/* CSS Top Sites - Main Stylesheet */
/* Optimized for performance and black backgrounds */

:root {
    --primary-black: #000;
    --primary-white: #fff;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --text-gray: #b0b0b0;
    --border-gray: #333;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111;
    --success-color: #28a745;
    --code-bg: #1a1a1a;
    --transition-speed: 0.3s;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--primary-black);
    color: var(--primary-white);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 1.5rem;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: 1rem;
    color: var(--text-gray);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

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

code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    background-color: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
}

pre {
    background-color: var(--code-bg);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--border-gray);
}

pre code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-gray);
    z-index: 1000;
    transition: transform var(--transition-speed) ease;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-white);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-gray);
    font-weight: 500;
    transition: color var(--transition-speed) ease;
}

.nav-menu a:hover {
    color: var(--primary-white);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 24px;
}

.nav-toggle span {
    width: 100%;
    height: 3px;
    background-color: var(--primary-white);
    margin: 3px 0;
    transition: var(--transition-speed);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #000 0%, #111 100%);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.01) 10px,
        rgba(255, 255, 255, 0.01) 20px
    );
    animation: slide 20s linear infinite;
}

@keyframes slide {
    0% {
        transform: translate(-50%, -50%);
    }
    100% {
        transform: translate(0, 0);
    }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-demo {
    margin-top: 3rem;
}

.code-preview {
    background-color: var(--code-bg);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--primary-white);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-white);
    border: 2px solid var(--primary-white);
}

.btn-secondary:hover {
    background-color: var(--primary-white);
    color: var(--primary-black);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-intro {
    font-size: 1.125rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    color: var(--text-gray);
}

/* Techniques Grid */
.techniques-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.technique-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.technique-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.technique-card h3 {
    color: var(--primary-white);
    margin-bottom: 1.5rem;
}

.demo-box {
    width: 100%;
    height: 150px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}

.demo-text {
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--primary-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.pattern-demo {
    background-color: #000;
    background-image: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 255, 255, 0.05) 10px,
        rgba(255, 255, 255, 0.05) 20px
    );
}

.overlay-demo {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
                url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PGRlZnM+PHBhdHRlcm4gaWQ9ImdyaWQiIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgcGF0dGVyblVuaXRzPSJ1c2VyU3BhY2VPblVzZSI+PHBhdGggZD0iTSAwIDEwIEwgNDAgMTAgTSAxMCAwIEwgMTAgNDAgTSAwIDIwIEwgNDAgMjAgTSAyMCAwIEwgMjAgNDAgTSAwIDMwIEwgNDAgMzAgTSAzMCAwIEwgMzAgNDAiIGZpbGw9Im5vbmUiIHN0cm9rZT0iIzMzMzMzMyIgb3BhY2l0eT0iMC4yIi8+PC9wYXR0ZXJuPjwvZGVmcz48cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSJ1cmwoI2dyaWQpIi8+PC9zdmc+');
    background-size: cover;
    background-position: center;
}

.animated-demo {
    background-color: #000;
    animation: darkPulse 3s ease-in-out infinite;
}

@keyframes darkPulse {
    0%, 100% {
        background-color: #000;
    }
    50% {
        background-color: #111;
    }
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--accent-color);
    color: var(--primary-white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.875rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.technique-card:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background-color: var(--accent-hover);
}

.copy-btn.copied {
    background-color: var(--success-color);
}

/* Showcase Grid */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.showcase-item {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    overflow: hidden;
    transition: transform var(--transition-speed) ease;
}

.showcase-item:hover {
    transform: translateY(-5px);
}

.showcase-demo {
    height: 250px;
    position: relative;
    overflow: hidden;
}

.pure-black {
    background-color: #000;
}

.gradient-mesh {
    background-color: #000;
    background-image: 
        radial-gradient(at 20% 80%, #1a1a1a 0%, transparent 50%),
        radial-gradient(at 80% 20%, #0a0a0a 0%, transparent 50%),
        radial-gradient(at 40% 40%, #111 0%, transparent 50%);
}

.noise-texture {
    background-color: #000;
    position: relative;
}

.noise-texture::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-conic-gradient(#000 0%, #111 5%, #000 10%);
    opacity: 0.1;
    mix-blend-mode: multiply;
}

.content-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
}

.content-overlay h4 {
    margin-bottom: 0.5rem;
}

.content-overlay p {
    margin-bottom: 0;
    font-size: 0.875rem;
}

.showcase-code {
    padding: 1.5rem;
}

.showcase-code pre {
    margin-bottom: 1rem;
}

.showcase-code .copy-btn {
    position: static;
    opacity: 1;
    width: 100%;
}

/* Property Grid */
.property-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.property-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
    transition: transform var(--transition-speed) ease;
}

.property-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-color);
}

.property-card h3 {
    color: var(--accent-color);
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    margin-bottom: 1rem;
}

.learn-more {
    display: inline-flex;
    align-items: center;
    color: var(--accent-color);
    font-weight: 600;
    margin-top: 1rem;
}

.learn-more:hover {
    transform: translateX(5px);
}

/* Advanced Techniques */
.technique-showcase {
    display: grid;
    gap: 3rem;
    margin-top: 3rem;
}

.advanced-technique {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
}

.technique-demo {
    height: 200px;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.multiple-bg-demo {
    background:
        linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%),
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        #000;
}

.pattern-demo-advanced {
    background-color: #000;
    background-image:
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(255, 255, 255, .05) 35px, rgba(255, 255, 255, .05) 70px),
        repeating-linear-gradient(-45deg, transparent, transparent 35px, rgba(255, 255, 255, .03) 35px, rgba(255, 255, 255, .03) 70px);
}

.dynamic-bg-demo {
    background: linear-gradient(135deg, #000 0%, #111 100%);
    transition: background 0.3s ease;
}

/* Generator */
.generator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
}

.generator-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-weight: 600;
    color: var(--primary-white);
}

.control-group select,
.control-group input[type="text"] {
    background-color: var(--code-bg);
    color: var(--primary-white);
    border: 1px solid var(--border-gray);
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 1rem;
}

.color-controls {
    display: grid;
    grid-template-columns: auto 60px 1fr;
    gap: 0.5rem;
    align-items: center;
}

.color-controls input[type="color"] {
    width: 50px;
    height: 40px;
    border: 1px solid var(--border-gray);
    border-radius: 6px;
    cursor: pointer;
}

.preview-box {
    height: 300px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 2rem;
}

.generated-code {
    background-color: var(--code-bg);
    border: 1px solid var(--border-gray);
    border-radius: 8px;
    padding: 1.5rem;
}

.generated-code h4 {
    margin-bottom: 1rem;
}

.generated-code pre {
    margin-bottom: 1rem;
    background: none;
    padding: 0;
    border: none;
}

/* Examples Gallery */
.examples-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.example-item {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    overflow: hidden;
    transition: transform var(--transition-speed) ease;
}

.example-item:hover {
    transform: translateY(-5px);
}

.example-preview {
    height: 200px;
    position: relative;
}

.tech-startup {
    background: linear-gradient(135deg, #000 0%, #0a0a0a 50%, #111 100%);
}

.portfolio {
    background: #000;
}

.gaming {
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 123, 255, 0.1) 0%, transparent 30%),
        #000;
}

.photography {
    background-color: #000;
}

.example-item h3 {
    padding: 1.5rem 1.5rem 0.5rem;
}

.example-item p {
    padding: 0 1.5rem 1rem;
    font-size: 0.875rem;
}

.view-code-btn {
    width: calc(100% - 3rem);
    margin: 0 1.5rem 1.5rem;
    padding: 0.75rem;
    background-color: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.view-code-btn:hover {
    background-color: var(--accent-color);
    color: var(--primary-white);
}

/* FAQ Section */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.faq-item {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
}

.faq-item h3 {
    color: var(--primary-white);
    margin-bottom: 1rem;
}

/* Resources Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.resource-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-speed) ease;
    display: block;
}

.resource-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.resource-card h3 {
    color: var(--primary-white);
    margin-bottom: 0.5rem;
}

.resource-card p {
    margin-bottom: 0;
    font-size: 0.875rem;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-gray);
    padding: 4rem 0 2rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: var(--primary-white);
    margin-bottom: 1.5rem;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--text-gray);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-gray);
}

.footer-bottom p {
    color: var(--text-gray);
    margin-bottom: 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(0, 0, 0, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        backdrop-filter: blur(10px);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .generator-wrapper {
        grid-template-columns: 1fr;
    }

    .techniques-grid,
    .showcase-grid,
    .property-grid {
        grid-template-columns: 1fr;
    }

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

    .hero {
        padding: 80px 20px 40px;
    }

    .section {
        padding: 3rem 0;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* Accessibility */
:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .nav,
    .footer,
    .copy-btn,
    .generator-wrapper,
    .cta-buttons {
        display: none;
    }
}