/* Praval Website - Dark Theme Stylesheet */

/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    /* Colors - Dark Theme with Coral Accent */
    --color-bg-primary: #0f1419;
    --color-bg-secondary: #1a1f2e;
    --color-bg-tertiary: #161b22;
    --color-text-primary: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-text-muted: #6e7681;
    --color-accent: #E86452;
    --color-accent-hover: #ff7a63;
    --color-accent-light: rgba(232, 100, 82, 0.1);
    --color-success: #2ea043;
    --color-border: #30363d;

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

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

    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-system);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   Navigation
   =========================== */
.nav {
    background-color: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-logo {
    width: 40px;
    height: 40px;
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

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

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-highlight {
    background-color: var(--color-accent-light);
    border-left: 4px solid var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius);
}

.highlight-number {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.highlight-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-badges {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.badge {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.coral-logo {
    width: 100%;
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(232, 100, 82, 0.3));
    animation: float 6s ease-in-out infinite;
}

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

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(232, 100, 82, 0.3);
}

.btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ===========================
   Sections
   =========================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   Philosophy Section
   =========================== */
.philosophy {
    background-color: var(--color-bg-secondary);
}

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

.metaphor-card {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    text-align: center;
}

.metaphor-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.metaphor-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.metaphor-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.metaphor-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* ===========================
   Features Section
   =========================== */
.features {
    background-color: var(--color-bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.feature-card code {
    background-color: var(--color-bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-accent);
}

/* ===========================
   Quick Start Code Section
   =========================== */
.quickstart {
    background-color: var(--color-bg-secondary);
}

.code-example {
    background-color: var(--color-bg-tertiary);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-md);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
}

.code-label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
}

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

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

pre {
    margin: 0;
    padding: var(--spacing-md);
    overflow-x: auto;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text-primary);
}

/* Syntax Highlighting */
.language-python .comment { color: #6e7681; font-style: italic; }
.language-python .decorator { color: #ff7b72; }
.language-python .string { color: #a5d6ff; }
.language-python .keyword { color: #ff7b72; }
.language-python .function { color: #d2a8ff; }
.language-python .number { color: #79c0ff; }

.comparison {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--border-radius);
    flex-wrap: wrap;
}

.comparison-item {
    text-align: center;
}

.comparison-label {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.comparison-label.bad {
    color: #f85149;
}

.comparison-label.good {
    color: var(--color-success);
}

.comparison-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.comparison-arrow {
    font-size: 2rem;
    color: var(--color-accent);
}

/* ===========================
   Use Cases Section
   =========================== */
.use-cases {
    background-color: var(--color-bg-primary);
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.use-case-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.use-case-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.use-case-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.use-case-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.use-case-card strong {
    color: var(--color-accent);
}

.use-case-card ul {
    list-style: none;
    padding-left: 0;
}

.use-case-card li {
    color: var(--color-text-secondary);
    padding: 0.375rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.use-case-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ===========================
   Installation Section
   =========================== */
.installation {
    background-color: var(--color-bg-secondary);
}

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

.install-step {
    display: flex;
    gap: var(--spacing-md);
}

.step-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.code-block {
    position: relative;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.code-block .copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
}

.code-block pre {
    padding: var(--spacing-sm);
    padding-right: 5rem;
}

.install-docker {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.install-docker h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--color-text-primary);
}

/* ===========================
   Resources Section
   =========================== */
.resources {
    background-color: var(--color-bg-primary);
}

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

.resource-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: var(--transition);
    display: block;
}

.resource-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.resource-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.resource-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.resource-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* ===========================
   About Section
   =========================== */
.about {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-xl) 0;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.about-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.about-link:hover {
    background-color: var(--color-accent-light);
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.about-link svg {
    flex-shrink: 0;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 60px;
    height: 60px;
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.footer-tagline {
    color: var(--color-accent) !important;
    font-weight: 600;
}

.footer-column h4 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

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

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

.footer-column a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-bottom p {
    margin: 0.25rem 0;
}

/* ===========================
   Responsive Design
   =========================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .coral-logo {
        max-width: 300px;
    }

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

/* Mobile */
@media (max-width: 640px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg-primary);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        display: none;
    }

    .nav-links.active {
        display: flex;
    }

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

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

    .highlight-number {
        font-size: 1.5rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

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

    .metaphor-grid,
    .features-grid,
    .use-case-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .install-steps {
        grid-template-columns: 1fr;
    }

    .comparison {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .code-block pre {
        font-size: 0.875rem;
        padding-right: var(--spacing-sm);
    }

    .code-block .copy-btn {
        position: static;
        margin: var(--spacing-xs);
        width: calc(100% - 1rem);
    }
}

/* Large Desktop */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }

    .hero-title {
        font-size: 4rem;
    }
}