/* Base Dark Mode Variables */
:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-red: #f85149;
    --accent-purple: #bc8cff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

a {
    color: var(--accent-green);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Header & Navigation */
.site-header {
    text-align: center;
    padding: 40px 20px 20px;
    border-bottom: 1px solid #30363d;
}

.site-header h1 {
    color: var(--accent-blue);
    margin: 0 0 10px 0;
    font-size: 2.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.nav-links {
    list-style: none;
    padding: 0;
    margin: 20px 0 0 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.nav-links a {
    color: var(--accent-green);
    font-weight: bold;
}

.nav-links a.active {
    color: var(--text-primary);
    border-bottom: 2px solid var(--accent-blue);
}

/* Container */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Featured Post (Hero) */
.featured-post {
    background-color: var(--card-bg);
    border: 1px solid #30363d;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 50px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.featured-post h2 a {
    color: var(--text-primary);
    font-size: 1.8rem;
}

.featured-post h2 a:hover {
    color: var(--accent-blue);
}

/* BLUF Box */
.bluf-box {
    background-color: rgba(88, 166, 255, 0.1);
    border-left: 4px solid var(--accent-blue);
    padding: 15px;
    margin: 20px 0;
    font-size: 0.95rem;
}

.read-more {
    display: inline-block;
    margin-top: 15px;
    font-weight: bold;
    color: var(--accent-blue);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
    margin-bottom: 10px;
    margin-right: 5px;
}

.badge-red { background-color: rgba(248, 81, 73, 0.15); color: var(--accent-red); border: 1px solid var(--accent-red); }
.badge-blue { background-color: rgba(88, 166, 255, 0.15); color: var(--accent-blue); border: 1px solid var(--accent-blue); }
.badge-case { background-color: rgba(188, 140, 255, 0.15); color: var(--accent-purple); border: 1px solid var(--accent-purple); }
.badge-capstone { background-color: rgba(63, 185, 80, 0.15); color: var(--accent-green); border: 1px solid var(--accent-green); }

/* Archive Section */
.section-title {
    color: var(--accent-blue);
    border-bottom: 1px solid #30363d;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.post-item {
    padding: 20px 0;
    border-bottom: 1px solid #21262d;
}

.post-item:last-child {
    border-bottom: none;
}

.post-item h4 {
    margin: 5px 0;
    font-size: 1.3rem;
}

.date {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid #30363d;
    margin-top: 50px;
}