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

:root {
    --bg-color: #0a0a0a;
    --text-color: #e8e8e8;
    --text-muted: #888888;
    --accent-color: #4a9eff;
    --border-color: #2a2a2a;
    --hover-bg: #1a1a1a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    font-size: 16px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 30px;
}

/* Header Section */
.header {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 18%;
    border: 3px solid var(--border-color);
    flex-shrink: 0;
}

.profile-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--hover-bg);
    border: 3px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.header-content h1 {
    font-size: 2.2em;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-color);
}

.header-content p {
    color: var(--text-muted);
    font-size: 1.05em;
    margin-bottom: 15px;
}

.contact-links {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.contact-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95em;
    transition: color 0.3s;
}

.contact-links a:hover {
    color: var(--accent-color);
}

.contact-links a i {
    margin-right: 4px;
}

/* Bio Section */
.bio {
    margin-bottom: 50px;
    line-height: 1.8;
    font-size: 1.05em;
}

.bio p {
    margin-bottom: 15px;
    color: var(--text-color);
}

.bio a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.bio a:hover {
    border-bottom-color: var(--accent-color);
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
    padding: 25px;
    background: var(--hover-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2em;
    font-weight: 700;
    color: var(--accent-color);
    display: block;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9em;
    color: var(--text-muted);
}

/* Section */
section {
    margin-bottom: 50px;
}

.section-title {
    font-size: 1.5em;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    font-size: 0.9em;
    color: var(--accent-color);
}

/* Timeline Items */
.timeline-item {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

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

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 10px;
}

.timeline-title {
    font-size: 1.15em;
    font-weight: 600;
    color: var(--text-color);
}

.timeline-date {
    color: var(--text-muted);
    font-size: 0.9em;
}

.timeline-subtitle {
    color: var(--text-muted);
    margin-bottom: 12px;
    font-size: 0.95em;
}

.timeline-subtitle a {
    color: var(--accent-color);
    text-decoration: none;
}

.timeline-subtitle a:hover {
    text-decoration: underline;
}

.timeline-description {
    color: var(--text-color);
    line-height: 1.7;
}

.timeline-description ul {
    list-style: none;
    padding-left: 0;
    margin-top: 10px;
}

.timeline-description li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
}

.timeline-description li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.tag {
    padding: 4px 12px;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--text-muted);
}

/* Highlight Box */
.highlight-box {
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    padding: 20px;
    border-radius: 4px;
    margin-bottom: 30px;
}

.highlight-box h3 {
    font-size: 1.2em;
    margin-bottom: 12px;
    color: var(--text-color);
}

.highlight-box ul {
    list-style: none;
    padding-left: 0;
}

.highlight-box li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
    color: var(--text-color);
}

.highlight-box li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* News Section */
.news-item {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

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

.news-date {
    color: var(--text-muted);
    font-size: 0.9em;
    min-width: 120px;
    flex-shrink: 0;
}

.news-content {
    color: var(--text-color);
    line-height: 1.7;
}

.news-content a {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.news-content a:hover {
    border-bottom-color: var(--accent-color);
}

/* Scrollable Highlights Container */
.highlights-container {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 10px;
}

.highlights-container::-webkit-scrollbar {
    width: 6px;
}

.highlights-container::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 3px;
}

.highlights-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.highlights-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* CVE List */
.cve-list {
    display: grid;
    gap: 15px;
}

.cve-item {
    padding: 15px;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: border-color 0.3s;
}

.cve-item:hover {
    border-color: var(--accent-color);
}

.cve-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 5px;
}

.cve-id {
    font-weight: 600;
    color: var(--accent-color);
    font-size: 0.95em;
}

.cve-date {
    font-size: 0.85em;
    color: var(--text-muted);
}

.cve-description {
    color: var(--text-muted);
    font-size: 0.9em;
}

/* Skills */
.skills-grid {
    display: grid;
    gap: 20px;
}

.skill-category {
    padding: 20px;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.skill-category h4 {
    font-size: 1em;
    margin-bottom: 12px;
    color: var(--text-color);
}

.skill-list {
    color: var(--text-muted);
    font-size: 0.95em;
    line-height: 1.8;
}

/* Footer */
footer {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9em;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 40px 20px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-content h1 {
        font-size: 1.8em;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
}