/* ===== Layout (Base) ===== */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  width: 100%;
  flex: 1;
}

/* ===== Header ===== */
body > header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
}

body > header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1rem;
}

.site-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-accent);
  letter-spacing: 0.5px;
}

.site-title:hover {
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  font-family: var(--font-sans);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

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

.nav-links a.active {
  color: var(--color-text);
  font-weight: 600;
}

/* ===== Landing ===== */
.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: calc(100vh - 58px - 4rem - 53px);
}

.landing .profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.landing .icon {
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  object-fit: cover;
}

.landing h1 {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  margin-top: 0.5rem;
  color: var(--color-accent);
  letter-spacing: 0.5px;
}

.landing .subtitle {
  color: var(--color-text-secondary);
}

.landing .links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.landing .links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.landing .links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.landing .links a svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ===== Blog List ===== */
.blog-list h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}

.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag-btn {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.tag-btn:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.tag-btn.active {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.post-list {
  list-style: none;
}

.post-row {
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  gap: 1rem;
}

.post-row:hover {
  text-decoration: none;
}

.post-row:hover .post-title {
  color: var(--color-link);
}

.post-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.6;
  flex: 1;
  min-width: 0;
  min-height: 3.2rem;
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.post-meta {
  display: contents;
}

.post-meta-sep {
  display: none;
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
  width: 6.5rem;
  white-space: nowrap;
  order: -1;
}

.post-readtime {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
  white-space: nowrap;
  text-align: right;
}

@media (max-width: 640px) {
  .post-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .post-title {
    min-height: auto;
  }

  .post-meta {
    display: flex;
    align-items: center;
    gap: 0.625rem;
  }

  .post-meta-sep {
    display: inline;
    color: var(--color-text-muted);
  }

  .post-date {
    width: auto;
    order: 0;
  }
}

/* ===== Blog Post Detail ===== */
.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-accent);
}

.back-link:hover {
  color: var(--color-link-hover);
}

.post-detail h1 {
  font-size: 1.75rem;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.post-detail .meta {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.post-detail .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.post-detail .tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.75rem;
  border-radius: 9999px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: color 0.2s, border-color 0.2s;
}

.post-detail .tag:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  text-decoration: none;
}

.header-divider {
  border-bottom: 1px solid var(--color-border);
  margin-top: 1rem;
  margin-bottom: 2.5rem;
}

/* ===== Resume ===== */
.resume h1 {
  font-size: 1.75rem;
  margin-bottom: 2rem;
}

.resume h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-entry {
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.timeline-entry:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.period {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.company {
  font-weight: 700;
  font-size: 1.0625rem;
  margin-top: 0.25rem;
}

.role {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-top: 0.125rem;
}

.description-list {
  margin-top: 0.75rem;
}

.desc-item {
  display: flex;
  align-items: flex-start;
  gap: 0.375rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

.desc-marker {
  color: var(--color-accent);
  flex-shrink: 0;
}

.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.skill-category {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skill-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}