:root {
    --bg-dark: #1A1A1B;
    --navy-deep: #0A192F;
    --navy-accent: #112240;
    --text-primary: #FFFFFF;
    --text-secondary: #8892B0;
    --accent-blue: #64FFDA; /* Using a professional cyan/teal accent for tech feel */
    --border-color: #233554;
    --sidebar-width: 280px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header Styles */
header {
    background-color: var(--navy-deep);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.core-access-btn {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
    padding: 8px 20px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.core-access-btn:hover {
    background-color: var(--text-primary);
    color: var(--navy-deep);
}

/* Layout */
.main-container {
    display: flex;
    flex: 1;
}

/* Sidebar */
aside {
    width: var(--sidebar-width);
    background-color: var(--navy-accent);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1rem;
    height: calc(100vh - 70px);
    position: sticky;
    top: 70px;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 0.5rem;
}

.sidebar-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 10px 15px;
    border-radius: 4px;
    font-size: 0.95rem;
    transition: background 0.2s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--text-primary);
}

/* Content Area */
main {
    flex: 1;
    padding: 3rem;
    max-width: 1000px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

h2 {
    font-size: 1.8rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Badges & Technical Elements */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.badge-verified {
    background-color: rgba(100, 255, 218, 0.1);
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
}

.technical-card {
    background-color: var(--navy-accent);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.code-block {
    background-color: #011627;
    padding: 1rem;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    color: #d6deeb;
    margin: 1rem 0;
    overflow-x: auto;
}

/* Grid for Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Footer */
footer {
    background-color: var(--navy-deep);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    aside {
        width: 100%;
        height: auto;
        position: static;
    }
    main {
        padding: 1.5rem;
    }
}