/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary: 199 89% 48%;
    --primary-light: 199 89% 60%;
    --secondary: 172 66% 50%;
    --accent: 25 95% 53%;

    --background: 210 40% 98%;
    --foreground: 222 47% 11%;
    --card: 0 0% 100%;
    --card-foreground: 222 47% 11%;
    --muted: 210 40% 96%;
    --muted-foreground: 215 16% 47%;
    --border: 214 32% 91%;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, hsl(199 89% 48%), hsl(172 66% 50%));
    --gradient-accent: linear-gradient(135deg, hsl(25 95% 53%), hsl(340 82% 52%));
    --gradient-hero: radial-gradient(ellipse at top, hsl(199 89% 48% / 0.15), transparent 50%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 40px hsl(199 89% 48% / 0.3);

    /* Typography */
    --font-sans: 'DM Sans', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
img.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 8px;
}

/* Logo icon image styling */
.logo-icon img {
    width: 24px;
    height: 24px;
}

/* Section icon styling */
.section-icon {
    width: 48px;
    margin-bottom: 0.5rem;
}

/* Dark Mode */
.dark {
    --background: 222 47% 6%;
    --foreground: 210 40% 98%;
    --card: 222 47% 9%;
    --card-foreground: 210 40% 98%;
    --muted: 217 33% 15%;
    --muted-foreground: 215 20% 65%;
    --border: 217 33% 20%;

    --gradient-hero: radial-gradient(ellipse at top, hsl(199 89% 48% / 0.25), transparent 50%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Utilities ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

/* ===== Global Section Spacing ===== */
section {
    padding: 5rem 0;
}

@media (max-width: 640px) {
    section {
        padding: 3.5rem 0;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.938rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 60px hsl(199 89% 48% / 0.4);
}

.btn-secondary {
    background: hsl(var(--muted));
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--border));
}

.btn-secondary:hover {
    background: hsl(var(--border));
}

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

.btn-outline:hover {
    background: hsl(var(--muted));
}

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

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

/* ===== Button Focus State ===== */
.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px hsl(var(--primary) / 0.4);
}

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: hsl(var(--background) / 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid hsl(var(--border));
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gradient-primary);
    border-radius: 0.5rem;
    color: white;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-desktop {
    display: none;
    gap: 2rem;
}

@media (min-width: 768px) {
    .nav-desktop {
        display: flex;
    }
}

.nav-link {
    font-weight: 500;
    color: hsl(var(--muted-foreground));
    transition: var(--transition);
}

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

.header-actions {
    display: none;
    align-items: center;
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .header-actions {
        display: flex;
    }
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: transparent;
    border: 1px solid hsl(var(--border));
    border-radius: 0.5rem;
    cursor: pointer;
    color: hsl(var(--muted-foreground));
    transition: var(--transition);
}

.theme-toggle:hover {
    background: hsl(var(--muted));
    color: hsl(var(--foreground));
}

.moon-icon {
    display: none;
}

.dark .sun-icon {
    display: none;
}

.dark .moon-icon {
    display: block;
}

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: hsl(var(--muted));
    border-radius: 0.5rem;
    font-weight: 500;
    transition: var(--transition);
}

.github-link:hover {
    background: hsl(var(--border));
}

.mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: hsl(var(--foreground));
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.nav-mobile {
    display: none;
    flex-direction: column;
    padding: 1rem 1.5rem;
    border-top: 1px solid hsl(var(--border));
}

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

.nav-mobile .nav-link {
    padding: 0.75rem 0;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    padding: 6rem 0;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--gradient-hero);
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: hsl(var(--primary) / 0.1);
    border: 1px solid hsl(var(--primary) / 0.2);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: hsl(var(--primary));
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

.hero-description {
    font-size: 1.125rem;
    color: hsl(var(--muted-foreground));
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 2rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
    .hero-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: hsl(var(--muted-foreground));
}

/* ===== Section Styles ===== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.section-description {
    color: hsl(var(--muted-foreground));
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Features Section ===== */
.features {
    padding: 5rem 0;
    background: hsl(var(--muted) / 0.5);
}

.features-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    padding: 2rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 1rem;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
}

.feature-icon.blue {
    background: hsl(199 89% 48% / 0.1);
    color: hsl(199 89% 48%);
}

.feature-icon.teal {
    background: hsl(172 66% 50% / 0.1);
    color: hsl(172 66% 50%);
}

.feature-icon.orange {
    background: hsl(25 95% 53% / 0.1);
    color: hsl(25 95% 53%);
}

.feature-icon.purple {
    background: hsl(262 83% 58% / 0.1);
    color: hsl(262 83% 58%);
}

.feature-icon.green {
    background: hsl(142 76% 36% / 0.1);
    color: hsl(142 76% 36%);
}

.feature-icon.pink {
    background: hsl(340 82% 52% / 0.1);
    color: hsl(340 82% 52%);
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: hsl(var(--muted-foreground));
    font-size: 0.938rem;
}

/* ===== Branches Section ===== */
.branches {
    padding: 5rem 0;
}

.branches-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .branches-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .branches-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.branch-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 1rem;
    transition: var(--transition);
}

.branch-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: hsl(var(--primary) / 0.3);
}

.branch-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    background: var(--gradient-primary);
    border-radius: 1rem;
    color: white;
    margin-bottom: 1rem;
}

.branch-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.branch-card p {
    font-size: 0.875rem;
    color: hsl(var(--primary));
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.branch-count {
    font-size: 0.75rem;
    color: hsl(var(--muted-foreground));
}

/* ===== CTA Section ===== */
.cta {
    padding: 5rem 0;
    background: hsl(var(--muted) / 0.5);
}

.cta-card {
    display: grid;
    gap: 3rem;
    padding: 3rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
}

@media (min-width: 1024px) {
    .cta-card {
        grid-template-columns: 1.5fr 1fr;
        align-items: center;
    }
}

.cta-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content > p {
    color: hsl(var(--muted-foreground));
    margin-bottom: 1.5rem;
}

.cta-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: hsl(var(--secondary));
    font-size: 0.875rem;
}

.cta-types h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.contribution-type {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: hsl(var(--muted));
    border-radius: 0.75rem;
    margin-bottom: 0.75rem;
}

.type-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: hsl(var(--primary) / 0.1);
    color: hsl(var(--primary));
    border-radius: 0.5rem;
}

.contribution-type h4 {
    font-size: 0.938rem;
    font-weight: 600;
    margin-bottom: 0.125rem;
}

.contribution-type p {
    font-size: 0.813rem;
    color: hsl(var(--muted-foreground));
}

/* ===== Footer ===== */
.footer {
    padding: 3rem 0 2rem;
    background: hsl(var(--card));
    border-top: 1px solid hsl(var(--border));
}

.footer-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr repeat(3, 1fr);
    }
}

.footer-brand p {
    color: hsl(var(--muted-foreground));
    font-size: 0.875rem;
    margin-top: 1rem;
    max-width: 280px;
}

.footer-links h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links a {
    display: block;
    color: hsl(var(--muted-foreground));
    font-size: 0.875rem;
    padding: 0.375rem 0;
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid hsl(var(--border));
    text-align: center;
    font-size: 0.875rem;
    color: hsl(var(--muted-foreground));
}

.footer-bottom p:last-child {
    margin-top: 0.5rem;
}

/* ===== Page Styles ===== */
.page-header {
    padding: 3rem 0;
    background: var(--gradient-hero);
}

.page-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.page-description {
    color: hsl(var(--muted-foreground));
}

.page-content {
    padding: 3rem 0;
}

/* ===== Cards Grid ===== */
.cards-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    padding: 1.5rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 1rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: hsl(var(--primary) / 0.3);
}

/* ===== Search ===== */
.search-container {
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-family: inherit;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 0.75rem;
    color: hsl(var(--foreground));
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: hsl(var(--primary));
    box-shadow: 0 0 0 3px hsl(var(--primary) / 0.1);
}

.search-input::placeholder {
    color: hsl(var(--muted-foreground));
}

/* ===== Filters ===== */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background: hsl(var(--muted));
    border: 1px solid hsl(var(--border));
    border-radius: 9999px;
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: hsl(var(--primary));
    color: white;
    border-color: hsl(var(--primary));
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: hsl(var(--muted-foreground));
    margin-bottom: 1.5rem;
}

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

.breadcrumb span {
    color: hsl(var(--foreground));
}

/* ===== Markdown Content ===== */
.prose {
    max-width: none;
    line-height: 1.8;
}

.prose h1, .prose h2, .prose h3, .prose h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.prose h1 { font-size: 1.875rem; }
.prose h2 { font-size: 1.5rem; }
.prose h3 { font-size: 1.25rem; }

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

.prose ul, .prose ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.prose li {
    margin-bottom: 0.5rem;
}

.prose code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    padding: 0.125rem 0.375rem;
    background: hsl(var(--muted));
    border-radius: 0.25rem;
}

.prose pre {
    margin: 1.5rem 0;
    padding: 1rem;
    background: hsl(222 47% 11%);
    border-radius: 0.5rem;
    overflow-x: auto;
}

.prose pre code {
    background: transparent;
    color: hsl(210 40% 98%);
    padding: 0;
}

.prose blockquote {
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid hsl(var(--primary));
    background: hsl(var(--muted));
    border-radius: 0 0.5rem 0.5rem 0;
}

/* ===== Contributors ===== */
.contributors-grid {
    display: grid;
    gap: 1rem;
}

@media (min-width: 768px) {
    .contributors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .contributors-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.contributor-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: 1rem;
    transition: var(--transition);
}

.contributor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contributor-avatar {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contributor-card h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contributor-card p {
    font-size: 0.813rem;
    color: hsl(var(--muted-foreground));
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

.nav-link.active {
    color: hsl(var(--primary));
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }