:root {
    --bg: #ffffff;
    --fg: #000000;
    --muted: #666666;
    --border: #e5e5e5;
    --max-width: 680px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: Inter, system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    font-size: 16px;
}

main {
    max-width: var(--max-width);
    padding: 60px 24px;
    margin: 0 auto;
}

/* Typography */
h1,
h2,
h3 {
    font-family: "Space Grotesk", sans-serif;
    letter-spacing: -0.02em;
    margin: 0 0 16px 0;
    font-weight: 500;
}

h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 24px;
}

h2 {
    font-size: 1.3rem;
    margin: 48px 0 24px 0;
}

h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

h4 {
    font-size: 1rem;
    font-weight: 500;
    margin: 16px 0 8px 0;
    color: var(--fg);
}

p {
    margin: 0 0 16px 0;
    color: var(--fg);
}

.intro {
    font-size: 1.1rem;
    color: var(--muted);
    margin-bottom: 48px;
    max-width: 600px;
}

.section-description {
    color: var(--muted);
    margin-bottom: 32px;
}

/* Sections */
section {
    margin-bottom: 64px;
}

/* Projects */
.project-item {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

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

.project-item h3 {
    margin-bottom: 12px;
}

.project-item p {
    color: var(--muted);
    margin-bottom: 16px;
}

/* Experience */
.experience-item {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

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

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
    gap: 16px;
}

.experience-period {
    font-size: 0.9rem;
    color: var(--muted);
    white-space: nowrap;
}

.experience-item p {
    color: var(--muted);
}

/* Detailed experience (hidden by default) */
.experience-detailed {
    margin-bottom: 48px;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.experience-meta {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 8px;
}

.experience-detailed ul {
    margin: 12px 0;
    padding-left: 20px;
    color: var(--muted);
}

/* Tech tags */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.tech-tag {
    font-size: 0.85rem;
    padding: 4px 10px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 12px;
    color: var(--muted);
    font-weight: 400;
}

/* Logs */
.log-item {
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    transition: all 0.2s ease;
}

.log-item:hover {
    background: rgba(0, 0, 0, 0.02);
    margin: 0 -12px;
    padding: 20px 12px;
    border-radius: 8px;
    border-bottom: 1px solid var(--border);
}

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

.log-item a {
    text-decoration: none;
    color: inherit;
    border: none;
    display: block;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
    gap: 16px;
}

.log-item h3 {
    margin-bottom: 0;
    font-size: 1.05rem;
    color: var(--fg);
    flex: 1;
}

.log-item p {
    color: var(--muted);
    margin-bottom: 8px;
}

.log-date {
    font-size: 0.85rem;
    color: var(--muted);
    white-space: nowrap;
    font-weight: 400;
}

.log-meta {
    font-size: 0.85rem;
    color: var(--muted);
    font-weight: 500;
}

/* Article pages */
article {
    max-width: 100%;
}

article header {
    margin-bottom: 48px;
}

article h1 {
    font-size: 2rem;
    margin-bottom: 16px;
}

article h2 {
    font-size: 1.3rem;
    margin: 32px 0 16px 0;
    color: var(--fg);
}

.article-meta {
    display: flex;
    gap: 16px;
    align-items: center;
}

.article-meta .log-meta {
    margin-bottom: 0;
}

.article-meta .log-date {
    color: var(--muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 640px) {
    .log-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}

code {
    background: rgba(0, 0, 0, 0.06);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.9rem;
}

ul {
    margin: 16px 0;
    padding-left: 20px;
    color: var(--muted);
}

/* How I Work */
.work-item {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

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

.work-item h3 {
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.work-item p {
    color: var(--muted);
}

/* Experience summary */
.experience-summary {
    margin-bottom: 24px;
}

.experience-summary p {
    color: var(--muted);
    font-size: 1rem;
}

/* Contact links */
.contact-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.contact-links a {
    color: var(--muted);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.contact-links a:hover {
    color: var(--fg);
    border-bottom-color: var(--fg);
}

/* View more links */
.view-more {
    margin-top: 24px;
}

.view-more a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border);
    transition: all 0.2s ease;
}

.view-more a:hover {
    color: var(--fg);
    border-bottom-color: var(--fg);
}

/* Back links */
.back-link {
    margin-bottom: 32px;
}

.back-link a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

.back-link a:hover {
    color: var(--fg);
    border-bottom-color: var(--fg);
}

/* Hidden sections */
.hidden {
    display: none;
}

/* Footer */
footer {
    margin-top: 80px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--muted);
}

/* Responsive */
@media (max-width: 640px) {
    main {
        padding: 40px 20px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .social-links {
        gap: 16px;
    }

    .tech-tags {
        gap: 6px;
    }
}