/* ===== CSS Variables ===== */
:root {
    --color-bg: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-tertiary: #18181b;
    --color-border: #27272a;
    --color-border-light: #3f3f46;
    
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    
    --color-primary: #22c55e;
    --color-primary-hover: #16a34a;
    --color-primary-subtle: rgba(34, 197, 94, 0.1);
    
    --color-accent: #3b82f6;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.125rem;
}

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

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

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn .icon {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

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

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

.btn-project {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.btn-project:hover {
    background-color: var(--color-bg-tertiary);
    border-color: var(--color-border-light);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
    background-color: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(34, 197, 94, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 720px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.hero h1 .highlight {
    color: var(--color-primary);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 560px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ===== Section Styles ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 540px;
    margin: 0 auto;
}

/* ===== About Section ===== */
.about {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-secondary);
}

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

.about-card {
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

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

.about-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===== Projects Section ===== */
.projects {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.project-card:hover {
    border-color: var(--color-border-light);
}

.project-card.featured {
    border-color: rgba(34, 197, 94, 0.3);
}

.project-card.featured:hover {
    border-color: rgba(34, 197, 94, 0.5);
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.project-icon {
    font-size: 2.5rem;
}

.project-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.project-tag.soon-tag {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-accent);
}

.project-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-lg);
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.feature-icon {
    font-size: 1rem;
}

.coming-soon-cta {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-lg);
}

.coming-soon-cta p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.link-subtle {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.link-subtle:hover {
    opacity: 0.8;
}

/* ===== Community Section ===== */
.community {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-secondary);
}

.community-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.community-content h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.community-content > p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-2xl);
}

.community-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-3xl);
}

.footer-column h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.footer-column a {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding-top: calc(64px + var(--spacing-2xl));
        padding-bottom: var(--spacing-3xl);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-links {
        gap: var(--spacing-2xl);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .project-features {
        flex-direction: column;
    }
}