/* --- Global Styles & Variables --- */
:root {
    /* Default: Dark Mode */
    --bg-color: #121212;
    --bg-color-rgb: 18, 18, 18;
    --secondary-bg-color: #1a1a1a;
    --text-color: #EAEAEA;
    --text-muted-color: #A0A0A0;
    --border-color: #2f2f2f;
    --accent-color: #4ade80; /* A nice green */
    --font-family: -apple-system,BlinkMacSystemFont,segoe ui,Roboto,Oxygen,Ubuntu,Cantarell,open sans,helvetica neue,sans-serif;
}

@media (prefers-color-scheme: light) {
    :root {
        /* Light Mode Overrides */
        --bg-color: #FBFBFB;
        --bg-color-rgb: 251, 251, 251;
        --secondary-bg-color: #FFFFFF;
        --text-color: #111827;
        --text-muted-color: #6B7280;
        --border-color: #E5E7EB;
    }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    font-size: 16px;
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container { width: 90%; max-width: 1024px; margin: 0 auto; }
.container.narrow { max-width: 768px; }

h1, h2, h3 { font-weight: 700; line-height: 1.3; margin-bottom: 1rem; color: var(--text-color); }
h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; margin-top: 3rem; }
h3 { font-size: 1.1rem; }
p { margin-bottom: 1.5rem; color: var(--text-muted-color); }
a { color: var(--accent-color); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--text-color); }
strong { color: var(--text-color); font-weight: 600; }
code {
    background-color: var(--secondary-bg-color);
    color: var(--text-muted-color);
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* --- Header --- */
.main-header {
    position: sticky; top: 0; width: 100%; z-index: 1000;
    background: rgba(var(--bg-color-rgb), 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}
.main-header .container { display: flex; justify-content: space-between; align-items: center; height: 65px; }
.logo { font-size: 1.1rem; font-weight: 700; color: var(--text-color); }
.main-nav ul { display: flex; list-style: none; gap: 1.5rem; }
.main-nav a { color: var(--text-muted-color); font-weight: 500; padding: 0.5rem; }
.main-nav a:hover, .main-nav a.active { color: var(--text-color); }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; }
.menu-toggle span { display: block; width: 22px; height: 2px; margin: 5px; background-color: var(--text-color); transition: all 0.3s; }

/* --- Homepage --- */
.hero-intro { padding: 80px 0; }
.hero-intro h1 { font-size: 3rem; max-width: 600px; }
.hero-intro .subtitle { font-size: 1.25rem; max-width: 600px; color: var(--text-muted-color); }
.article-list { padding: 40px 0 80px; }
.articles-grid { display: grid; gap: 1rem; }
.article-card {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.5rem; border: 1px solid var(--border-color);
    border-radius: 8px; background-color: var(--secondary-bg-color);
    transition: transform 0.2s ease, border-color 0.2s ease;
}
.article-card:hover { transform: translateY(-3px); border-color: var(--accent-color); }
.article-card h3 { margin-bottom: 0.25rem; font-size: 1.1rem; }
.article-card p { margin: 0; font-size: 0.95rem; }
.article-link { font-size: 0.9rem; font-weight: 500; white-space: nowrap; margin-left: 2rem; color: var(--text-muted-color); }
.article-card:hover .article-link { color: var(--accent-color); }

/* --- Work Page & Article Page --- */
.work-content, .page-content { padding: 80px 0; }
.work-content p, .page-content p { font-size: 1.1rem; line-height: 1.8; color: var(--text-color); }
.work-content a, .page-content a { text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent-color) 40%, transparent); }
.work-content a:hover, .page-content a:hover { text-decoration-color: var(--accent-color); }
.page-content ul, .page-content ol { padding-left: 25px; margin-bottom: 1.5rem; }
.page-content li { margin-bottom: 0.75rem; font-size: 1.1rem; color: var(--text-color); }
.page-content blockquote {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
    border-left: 3px solid var(--accent-color);
    font-style: italic;
    color: var(--text-muted-color);
}
.page-content .article-meta { font-size: 0.9rem; color: var(--text-muted-color); margin-bottom: 0.5rem; }
.page-content .back-link { display: inline-block; margin-top: 3rem; font-weight: 500; text-decoration: none; }
.page-content .back-link:hover { text-decoration: underline; }

.resume-heading { margin-top: 4rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-color); }
.resume-section { margin-top: 2rem; }
.resume-section h3 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted-color); margin-bottom: 1rem; }
.resume-section ul { list-style: none; padding-left: 0; }
.resume-section li { margin-bottom: 0.75rem; }
.resume-section p, .resume-section li { color: var(--text-color); font-size: 1rem; line-height: 1.6; }
.tech-list { font-style: italic; color: var(--text-muted-color); }

/* --- Footer --- */
.main-footer { padding: 30px 0; border-top: 1px solid var(--border-color); }
.main-footer .container { display: flex; justify-content: space-between; align-items: center; }
.main-footer p { margin: 0; font-size: 0.9rem; color: var(--text-muted-color); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.9rem; font-weight: 500; color: var(--text-muted-color); }

/* --- Animations & Responsive --- */
.fade-in { opacity: 0; transform: translateY(15px); transition: opacity 0.5s ease-out, transform 0.5s ease-out; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    .hero-intro h1 { font-size: 2rem; }
    .hero-intro .subtitle { font-size: 1.1rem; }
    .main-nav { display: none; position: absolute; top: 65px; left: 0; width: 100%; background: var(--bg-color); border-bottom: 1px solid var(--border-color); }
    .main-nav.active { display: block; }
    .main-nav ul { flex-direction: column; padding: 1rem; gap: 0; }
    .main-nav li { text-align: center; }
    .main-nav a { display: block; padding: 1rem; }
    .menu-toggle { display: block; }
    .article-card { flex-direction: column; align-items: flex-start; }
    .article-link { margin-top: 1rem; margin-left: 0; }
}