/* --- CSS VARIABLES & RESET --- */
:root {
    --bg-color: #f8f9fa;
    --text-main: #1a1a1a;
    --text-muted: #555;
    --accent: #2563eb; /* Technical Blue */
    --border: #e5e7eb;
    --card-bg: #ffffff;
    --font-mono: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --max-width: 800px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #111111;
        --text-main: #e5e5e5;
        --text-muted: #a3a3a3;
        --accent: #60a5fa;
        --border: #333333;
        --card-bg: #1a1a1a;
    }
}

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

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

a { color: var(--accent); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.8; text-decoration: underline; }

/* --- NAVIGATION --- */
.main-nav {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.main-nav .container {
    padding: 0;
    display: flex;
    justify-content: flex-end;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav li {
    margin-left: 1.5rem;
}

.main-nav li::before {
    content: none;
}

.main-nav a {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    text-decoration: none;
}

.main-nav a:hover {
    color: var(--text-main);
    text-decoration: none;
}

/* --- LAYOUT --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 4rem 1.5rem;
}

section { margin-bottom: 4rem; }

/* --- TYPOGRAPHY --- */
h1, h2, h3 {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; line-height: 1.2; margin-bottom: 1rem; }
h2 { font-size: 1.25rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.9rem; color: var(--text-muted); }
h3 { font-size: 1.1rem; margin-bottom: 0.25rem; }

p { margin-bottom: 1rem; color: var(--text-muted); }
ul { list-style: none; }
li { margin-bottom: 0.5rem; padding-left: 1.2rem; position: relative; color: var(--text-muted); }
li::before {
    content: "▹";
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* --- COMPONENTS --- */

/* Header/Hero */
.hero { margin-bottom: 5rem; }
.hero .subtitle {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    display: block;
}
.hero .bio { font-size: 1.2rem; color: var(--text-main); max-width: 600px; }

/* Achievement Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 4px;
    transition: transform 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }
.card h3 { margin-bottom: 0.75rem; }

/* Timeline/Experience */
.experience-item { margin-bottom: 2rem; }
.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}
.experience-role { font-weight: 600; color: var(--text-main); }
.experience-company { color: var(--accent); font-family: var(--font-mono); }
.experience-date { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-muted); }

/* Philosophy Tag Cloud */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.tag {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    border-radius: 50px;
    color: var(--text-main);
    font-family: var(--font-mono);
}

/* Footer */
footer {
    margin-top: 6rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
}
.social-links a { margin-left: 1.5rem; }

/* --- POST & PAGE --- */
.post, .page {
    margin-bottom: 4rem;
}

.post h1, .page h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.post .post-meta {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.post .post-content, .page .page-content {
    font-size: 1.1rem;
    line-height: 1.7;
}

.post .post-content h2, .page .page-content h2 {
    font-size: 1.5rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.post .post-content h3, .page .page-content h3 {
    font-size: 1.25rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.post .post-content img {
    max-width: 100%;
    display: block;
    margin: 2rem auto;
    border-radius: 4px;
}

.post .post-content figure {
    margin: 2rem 0;
}

.post .post-content figcaption {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.5rem;
}

.blog-tags {
    margin-top: 2rem;
}

.blog-tags span {
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.blog-tags a {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    margin-right: 1rem;
}

.pagination {
    margin-top: 4rem;
    display: flex;
    justify-content: space-between;
}

.pagination a {
    font-family: var(--font-mono);
    color: var(--accent);
}

/* Print Styles */
@media print {
    body { background: white; color: black; }
    .container { padding: 0; max-width: 100%; }
    .card { border: none; padding: 0; margin-bottom: 1.5rem; }
    a { text-decoration: none; color: black; }
    .experience-header { border-bottom: 1px solid #ccc; padding-bottom: 0.2rem; }
}