:root {
    --bg-color: #0d0d12;
    --surface-color: #16161e;
    --surface-hover: #1f1f2e;
    --text-primary: #a9b1d6;
    --text-secondary: #565f89;
    --accent-color: #7aa2f7;
    --accent-glow: rgba(122, 162, 247, 0.15);
    --font-mono: 'Fira Code', monospace;
    --font-sans: 'Inter', sans-serif;
}

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

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

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: #fff;
    text-shadow: 0 0 8px var(--accent-glow);
}

code {
    font-family: var(--font-mono);
    background: var(--surface-color);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--accent-color);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    background-color: rgba(13, 13, 18, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--surface-color);
}

.nav-brand a {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}

.nav-brand span {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

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

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: lowercase;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem;
    flex-grow: 1;
}

/* Hero */
.hero {
    margin-bottom: 4rem;
    border-left: 3px solid var(--accent-color);
    padding-left: 1.5rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero h1 code {
    background: none;
    padding: 0;
    color: #fff;
    font-size: 1.1em;
}

.subtitle {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.bio-short {
    font-size: 1.1rem;
    max-width: 700px;
}

/* Articles */
.articles h2 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.articles h2 code {
    background: none;
    color: var(--text-primary);
}

.article-grid {
    display: grid;
    gap: 1.5rem;
}

.card {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background: var(--accent-color);
    transform: scaleY(0);
    transition: transform 0.3s ease;
    transform-origin: top;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--surface-hover);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.card:hover::before {
    transform: scaleY(1);
}

.date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 0.5rem;
}

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.card h3 a {
    color: #fff;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.read-more {
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* About & Contact */
.about-content h1, .contact-content h1 {
    margin-bottom: 2rem;
}

.about-content h1 code, .contact-content h1 code {
    background: none;
    color: #fff;
    padding: 0;
    font-size: 1.2em;
}

.about-text p, .contact-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-text h3 {
    color: #fff;
    margin: 2.5rem 0 1rem 0;
}

.contact-list {
    list-style: none;
    margin-top: 2rem;
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 8px;
}

.contact-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.contact-list li:last-child {
    margin-bottom: 0;
}

.contact-list .label {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    width: 80px;
}

.pgp-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.8rem;
    border-top: 1px solid var(--surface-color);
}

/* Article Page */
.article-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--surface-color);
    padding-bottom: 1rem;
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    color: #fff;
    margin: 2rem 0 1rem 0;
}

.markdown-body p {
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
}

.markdown-body pre {
    background: var(--surface-color);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border: 1px solid #2a2a35;
}

.markdown-body code {
    background: var(--surface-color);
    color: var(--accent-color);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
}

.markdown-body pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
}

.markdown-body ul, .markdown-body ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.markdown-body img {
    display: block;
    margin: 2rem auto;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.markdown-body li {
    margin-bottom: 0.5rem;
}