/* ================================
   CSS Variables
   ================================ */
:root {
    /* Neon Pink Theme Colors */
    --color-primary: #FF2DBE;
    --color-primary-light: #FF8CF0;
    --color-primary-lighter: #FFE6FF;
    --color-pink-vivid: #FF55C3;
    --color-pink-medium: #FF5EC4;
    --color-pink-light: #FF9AD6;
    --color-pink-pale: #FFBEE8;

    /* Background Colors */
    --color-bg-black: #000000;
    --color-bg-dark: #0a0005;
    --color-bg-darker: #1a0010;

    /* Text Colors */
    --color-text-primary: #FFE6FF;
    --color-text-secondary: #FF9AD6;
    --color-text-muted: rgba(255, 230, 255, 0.7);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: 'Orbitron', sans-serif;
    --font-code: 'Fira Code', monospace;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 2rem;

    /* Shadows */
    --shadow-neon: 0 0 10px var(--color-primary), 0 0 20px var(--color-primary);
    --shadow-neon-strong: 0 0 20px var(--color-primary), 0 0 40px var(--color-primary), 0 0 60px var(--color-primary);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-black);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

::selection {
    background-color: var(--color-primary);
    color: var(--color-bg-black);
}

/* ================================
   Language Toggle
   ================================ */
.language-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-primary);
    backdrop-filter: blur(10px);
}

.lang-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.lang-btn.active {
    background: var(--color-primary);
    color: var(--color-bg-black);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-neon);
}

/* ================================
   Container
   ================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ================================
   Hero Section
   ================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.icon-wrapper {
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

.theme-icon {
    width: 150px;
    height: 150px;
    filter: drop-shadow(var(--shadow-neon-strong));
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

.neon-text {
    color: var(--color-primary);
    text-shadow:
        0 0 10px var(--color-primary),
        0 0 20px var(--color-primary),
        0 0 40px var(--color-primary),
        0 0 80px var(--color-primary);
    animation: neonPulse 2s ease-in-out infinite;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg-black);
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-neon);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-primary);
    box-shadow: var(--shadow-neon-strong);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-bg-black);
    box-shadow: var(--shadow-neon);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* Hero Background */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.neon-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 45, 190, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 45, 190, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    opacity: 0.3;
}

/* ================================
   Section Styles
   ================================ */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-description {
    text-align: center;
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ================================
   Features Section
   ================================ */
.features {
    background: linear-gradient(180deg, var(--color-bg-black) 0%, var(--color-bg-dark) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: rgba(255, 45, 190, 0.05);
    border: 1px solid rgba(255, 45, 190, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease-out backwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-neon);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    filter: drop-shadow(0 0 10px var(--color-primary));
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary-light);
}

.feature-description {
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ================================
   Color Palette Section
   ================================ */
.color-palette {
    background: var(--color-bg-black);
}

.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.color-item {
    background: rgba(255, 45, 190, 0.05);
    border: 1px solid rgba(255, 45, 190, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
}

.color-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.color-preview {
    width: 100%;
    height: 100px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.color-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--color-primary-light);
}

.color-code {
    font-family: var(--font-code);
    font-size: 1rem;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.color-usage {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ================================
   Installation Section
   ================================ */
.installation {
    background: linear-gradient(180deg, var(--color-bg-black) 0%, var(--color-bg-dark) 100%);
}

.installation-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.method-card {
    background: rgba(255, 45, 190, 0.05);
    border: 1px solid rgba(255, 45, 190, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.method-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.method-steps {
    list-style-position: inside;
    color: var(--color-text-muted);
}

.method-steps li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-xs);
}

.code-block {
    position: relative;
    background: var(--color-bg-black);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.code-block code {
    font-family: var(--font-code);
    color: var(--color-primary-light);
    font-size: 0.9rem;
    display: block;
    overflow-x: auto;
}

.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: var(--color-bg-black);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    box-shadow: var(--shadow-neon);
    transform: translateY(-2px);
}

/* ================================
   Language Support Section
   ================================ */
.language-support {
    background: var(--color-bg-black);
}

.language-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.lang-tag {
    padding: 0.75rem 1.5rem;
    background: rgba(255, 45, 190, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-lg);
    color: var(--color-primary-light);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.lang-tag:hover {
    background: var(--color-primary);
    color: var(--color-bg-black);
    box-shadow: var(--shadow-neon);
    transform: translateY(-2px);
}

/* ================================
   CTA Section
   ================================ */
.cta {
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-black) 100%);
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.cta-description {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ================================
   Footer
   ================================ */
.footer {
    background: var(--color-bg-black);
    border-top: 1px solid var(--color-primary);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.footer-description,
.footer-license,
.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-primary);
    text-shadow: var(--shadow-neon);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 45, 190, 0.2);
}

.footer-tagline {
    color: var(--color-primary-light);
    font-size: 1.125rem;
}

/* ================================
   Animations
   ================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes neonPulse {
    0%, 100% {
        text-shadow:
            0 0 10px var(--color-primary),
            0 0 20px var(--color-primary),
            0 0 40px var(--color-primary),
            0 0 80px var(--color-primary);
    }
    50% {
        text-shadow:
            0 0 5px var(--color-primary),
            0 0 10px var(--color-primary),
            0 0 20px var(--color-primary),
            0 0 40px var(--color-primary);
    }
}

@keyframes gridMove {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(50px);
    }
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 768px) {
    .language-toggle {
        top: 1rem;
        right: 1rem;
    }

    .hero {
        min-height: 90vh;
    }

    .theme-icon {
        width: 100px;
        height: 100px;
    }

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

    .btn {
        width: 100%;
        text-align: center;
    }

    .features-grid,
    .palette-grid,
    .installation-methods {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    section {
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

/* ================================
   Accessibility
   ================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .feature-card,
    .color-item,
    .method-card {
        border-width: 2px;
    }
}