/* Senior Engineering Portfolio Theme - Clean & Powerful */
:root {
    --bg-body: #ffffff;
    --bg-panel: #ffffff;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #9ca3af;
    --accent-primary: #2563eb; /* Professional Blue */
    --border-color: #e5e7eb;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    --nav-height: 64px;
}

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

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-container {
    width: 100%;
    max-width: 1200px;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-primary);
}

/* Main Layout */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + 4rem) 2rem 6rem;
}

/* Typography */
h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-bottom: 4rem;
    font-weight: 400;
}

h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 4rem 0 2rem;
    letter-spacing: -0.02em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.stat-card {
    padding: 1.5rem;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.bento-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: box-shadow 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
}

.bento-card:hover {
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
    border-color: #d1d5db;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.repo-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-decoration: none;
    background: #eff6ff;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    transition: background 0.2s;
}

.repo-link:hover {
    background: #dbeafe;
}

.tech-detail {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

/* Code Snippets */
.code-snippet {
    background: #1f2937; /* Dark gray for contrast */
    border-radius: 8px;
    padding: 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #e5e7eb;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.code-comment { color: #9ca3af; font-style: italic; }
.code-function { color: #93c5fd; } /* Light Blue */
.code-keyword { color: #fca5a5; } /* Light Red */
.code-string { color: #86efac; } /* Light Green */

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: auto;
}

.tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    background: #f3f4f6;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Featured Project Override */
.featured-project {
    grid-column: 1 / -1;
    background: #f8fafc; /* Very subtle blue-gray tint */
    border: 1px solid #e2e8f0;
}

.featured-project .card-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.featured-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    display: block;
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    .bento-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}