:root {
    --bg-dark: #0b0f19;
    --bg-card: rgba(18, 24, 38, 0.7);
    --bg-card-hover: rgba(28, 36, 56, 0.8);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-highlight: rgba(16, 185, 129, 0.3);
    
    --primary: #10b981;
    --primary-glow: rgba(16, 185, 129, 0.4);
    --primary-dark: #059669;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    
    --code-bg: #070a12;
}

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(16, 185, 129, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 30%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 50% 85%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
}

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

/* Header & Navbar */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    background: rgba(11, 15, 25, 0.85);
    border-bottom: 1px solid var(--border-color);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.logo-badge {
    background: linear-gradient(135deg, var(--primary), var(--accent-blue));
    color: #000;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 800;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--primary);
    transition: color 0.2s;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    border: 1px solid transparent;
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #000;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(16, 185, 129, 0.6);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

/* Responsive Media Queries */
@media (max-width: 768px) {
    nav {
        height: 64px;
        padding: 0 1rem;
    }
    .logo {
        font-size: 1.1rem;
        gap: 0.4rem;
    }
    .logo-badge {
        padding: 0.15rem 0.45rem;
        font-size: 0.7rem;
    }
    .nav-links {
        display: none;
    }
    .nav-actions {
        gap: 0.5rem;
    }
    .btn {
        padding: 0.5rem 0.85rem;
        font-size: 0.8rem;
    }
    header .btn-outline {
        display: none; /* Hide header GitHub btn on small mobile to avoid crowding */
    }
}

@media (max-width: 480px) {
    nav {
        padding: 0 0.75rem;
    }
    .logo {
        font-size: 1rem;
    }
}