:root {
    --bg-deep: #0F172A;
    --bg-card: #1E293B;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --accent: #8B5CF6;
    --accent-hover: #7C3AED;
    --border: #334155;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
    width: 280px;
    background-color: var(--bg-deep);
    border-right: 1px solid var(--border);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    text-decoration: none;
    color: var(--text-muted);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.nav-item:hover {
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--accent);
}

.nav-item.active {
    background-color: rgba(139, 92, 246, 0.15);
    color: var(--accent);
    font-weight: 600;
}

/* Main Content Area */
.main-content {
    margin-left: 280px;
    flex: 1;
    padding: 3rem 4rem;
    max-width: 1000px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.verify-btn {
    background-color: var(--accent);
    color: white;
    text-decoration: none;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.verify-btn:hover {
    background-color: var(--accent-hover);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 1.5rem;
    margin: 2.5rem 0 1rem;
    color: var(--text-main);
    border-left: 4px solid var(--accent);
    padding-left: 1rem;
}

p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 0.75rem;
    transition: transform 0.2s;
}

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

.card h3 {
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.badge {
    display: inline-block;
    background-color: rgba(139, 92, 246, 0.2);
    color: var(--accent);
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.tech-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background-color: var(--bg-card);
    border-radius: 0.5rem;
    overflow: hidden;
}

.tech-table th, .tech-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.tech-table th {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    font-weight: 600;
}

.tech-table td {
    color: var(--text-muted);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
}

footer {
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .main-content {
        margin-left: 0;
        padding: 2rem;
    }
}