/* ============================================================
   C1991 — GitHub-style design system
   Dark mode, system fonts, utilitarian minimalism
   ============================================================ */

/* ---- Design Tokens: GitHub Dark Mode ---- */
:root {
  --color-canvas:       #0d1117;
  --color-surface:      #161b22;
  --color-border:       #30363d;
  --color-border-muted: #21262d;
  --color-text-primary: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-tertiary: #6e7681;
  --color-accent:       #58a6ff;
  --color-accent-emphasis: #1f6feb;
  --color-success:      #3fb950;
  --color-danger:       #f85149;
  --color-warning:      #d2991d;

  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --radius-sm: 6px;
  --radius-md: 8px;
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--color-canvas);
  color: var(--color-text-primary);
  font-family: var(--font-system);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   PORTAL — Homepage
   ============================================================ */
.portal {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 80px 24px;
  width: 100%;
  flex: 1;
}

/* Brand */
.brand {
  font-family: var(--font-system);
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  line-height: 1;
}

.tagline {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
  letter-spacing: 0;
}

.divider {
  width: 80px;
  height: 1px;
  background: var(--color-border);
  border: none;
}

/* ---- Nav Cards ---- */
.nav-cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 400px;
}

.nav-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  text-decoration: none;
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background 0.15s var(--ease-out), border-color 0.15s;
}

.nav-card:hover {
  background: var(--color-border-muted);
  border-color: var(--color-text-tertiary);
  text-decoration: none;
}

.nav-card-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
}

.nav-card-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-card-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.nav-card-sub {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.nav-card-arrow {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s var(--ease-out), color 0.2s;
}

.nav-card:hover .nav-card-arrow {
  transform: translateX(3px);
  color: var(--color-text-secondary);
}

/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.stats-item {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.stats-item .val {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-right: 2px;
}

.stats-sep {
  width: 1px;
  height: 12px;
  background: var(--color-border);
}

/* ============================================================
   SUBPAGE LAYOUT
   ============================================================ */
.subpage {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 24px 0;
  width: 100%;
  flex: 1;
}

.subpage-container {
  width: 100%;
  max-width: 768px;
  flex: 1;
}

.subpage-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-tertiary);
  text-decoration: none;
  margin-bottom: 20px;
  transition: color 0.15s;
}
.subpage-back:hover { color: var(--color-accent); text-decoration: none; }

.subpage-heading {
  font-family: var(--font-system);
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: 4px;
}

.subpage-desc {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 24px;
}

.subpage-divider {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 0 0 28px;
}

/* ============================================================
   UNIFIED FOOTER
   ============================================================ */
.site-footer {
  text-align: center;
  padding: 40px 24px 32px;
  width: 100%;
  max-width: 768px;
}

.footer-divider {
  height: 1px;
  background: var(--color-border);
  max-width: 100%;
  margin: 0 auto 16px;
}

.site-footer .stats-bar { margin-bottom: 8px; }

.site-footer .copy {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.site-footer a {
  color: var(--color-text-tertiary);
  text-decoration: none;
}
.site-footer a:hover { color: var(--color-accent); text-decoration: none; }

/* ============================================================
   ABOUT PAGE
   ============================================================ */
.about-header { text-align: center; margin-bottom: 12px; }

.about-handle {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.about-section { margin-bottom: 24px; }

.about-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.about-section p,
.about-section li {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.about-section a {
  color: var(--color-accent);
  text-decoration: none;
}
.about-section a:hover { text-decoration: underline; }

/* Timeline */
.timeline { list-style: none; padding: 0; }

.timeline li {
  display: flex;
  gap: 16px;
  padding: 10px 0 10px 16px;
  border-left: 2px solid var(--color-border);
  transition: border-color 0.15s;
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li:hover { border-left-color: var(--color-text-tertiary); }

.timeline .year {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  min-width: 80px;
  flex-shrink: 0;
}

.timeline .event {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================================
   PHOTO BLOG — Card grid
   ============================================================ */
.tag-filter-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 24px;
}

.tag-pill {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 2em;
  color: var(--color-text-secondary);
  background: var(--color-border-muted);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.15s;
}
.tag-pill:hover { background: var(--color-border); color: var(--color-text-primary); }
.tag-pill.active { background: var(--color-accent-emphasis); border-color: var(--color-accent-emphasis); color: #fff; }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.photo-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.15s;
}
.photo-card:hover { border-color: var(--color-text-tertiary); }

.photo-card .card-image {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  background: var(--color-canvas);
}

.photo-card .card-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px 12px;
}

.photo-card .card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
}

.photo-card .card-date {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.photo-card .card-tag {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

/* ============================================================
   MY WORKS — Two-column layout
   ============================================================ */
.works-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.works-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.works-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.works-section-desc {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

/* Novel list */
.novel-list { display: flex; flex-direction: column; }

.novel-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  transition: border-color 0.15s;
}
.novel-item:hover { border-color: var(--color-text-tertiary); text-decoration: none; }

.novel-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.novel-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
}

.novel-meta .status { color: var(--color-text-secondary); }
.novel-meta .date { color: var(--color-text-tertiary); font-family: var(--font-mono); font-size: 11px; }

.novel-desc {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Image works grid */
.works-image-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.works-image-item {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: border-color 0.15s;
}
.works-image-item:hover { border-color: var(--color-text-tertiary); }

/* ============================================================
   AUTHOR SHARES — Time-sorted list
   ============================================================ */
.share-priority {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 2em;
}

.share-priority.pin { color: var(--color-warning); background: rgba(210, 153, 29, 0.10); }
.share-priority.hot { color: var(--color-danger); background: rgba(248, 81, 73, 0.10); }
.share-priority.new { color: var(--color-accent); background: rgba(88, 166, 255, 0.10); }

.share-list { display: flex; flex-direction: column; }

.share-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  transition: border-color 0.15s;
}
.share-item:hover { border-color: var(--color-text-tertiary); text-decoration: none; }

.share-item .rank-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-tertiary);
  min-width: 24px;
  flex-shrink: 0;
  padding-top: 1px;
}

.share-item:nth-child(1) .rank-num { color: var(--color-warning); }
.share-item:nth-child(2) .rank-num { color: #9ca3af; }
.share-item:nth-child(3) .rank-num { color: #b45309; }

.share-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }

.share-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.share-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.share-desc {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.share-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

.share-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
}

.share-tag {
  color: var(--color-text-secondary);
}

.share-arrow {
  color: var(--color-text-tertiary);
  font-size: 14px;
  flex-shrink: 0;
  padding-top: 2px;
  transition: transform 0.2s var(--ease-out), color 0.2s;
}
.share-item:hover .share-arrow { transform: translateX(3px); color: var(--color-text-secondary); }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-tertiary);
  font-size: 14px;
  font-weight: 400;
}

/* ============================================================
   ARTICLE CONTENT — Share detail view
   ============================================================ */
.article-content { max-width: 720px; margin: 0 auto; }

.article-header {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
  font-family: var(--font-system);
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  line-height: 1.3;
  margin-bottom: 8px;
}

.article-subtitle {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.article-meta {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-tertiary);
}

.article-meta-sep { color: var(--color-border); }

.article-lead {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.section-divider {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: 32px 0;
}

/* Article typography */
.article-content section h2 {
  font-family: var(--font-system);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-muted);
}

.article-content section h3 {
  font-family: var(--font-system);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 20px 0 8px;
}

.article-content section p {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.article-content section strong { font-weight: 600; color: var(--color-text-primary); }

.article-content section code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--color-text-secondary);
  background: var(--color-border-muted);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Callout */
.callout {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 16px;
  margin: 16px 0;
  border-radius: var(--radius-sm);
}

.callout.callout-accent {
  border-color: var(--color-accent);
  border-left: 3px solid var(--color-accent);
}

.callout-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.callout p { font-size: 13px !important; margin-bottom: 0 !important; }

.layer-list { display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }

.layer-list dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 2px;
}

.layer-list dd {
  font-size: 13px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* Tips list */
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}

.tip-item {
  display: flex;
  gap: 14px;
  padding: 14px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.tip-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-text-tertiary);
  flex-shrink: 0;
  line-height: 1;
}

.tip-body strong { display: block; font-size: 14px; font-weight: 600; color: var(--color-text-primary); margin-bottom: 2px; }
.tip-body p { font-size: 13px !important; margin-bottom: 0 !important; }

/* Compare box */
.compare-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 12px 0;
}

.compare-item {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  background: var(--color-surface);
}

.compare-item.bad { border-left-color: var(--color-danger); }
.compare-item.good { border-left-color: var(--color-success); }

.compare-badge {
  font-size: 11px;
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}
.compare-item.bad .compare-badge { color: var(--color-danger); }
.compare-item.good .compare-badge { color: var(--color-success); }

.compare-item p { font-size: 13px !important; margin-bottom: 2px !important; }
.compare-result { font-size: 12px; color: var(--color-text-tertiary); }

/* Code block */
.code-block {
  background: var(--color-canvas);
  border: 1px solid var(--color-border);
  padding: 16px;
  margin: 8px 0 16px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}
.code-block code { font-family: inherit; font-size: inherit; color: inherit; background: none !important; padding: 0 !important; }

/* Reference grid */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
  margin: 12px 0;
}

.ref-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
}

.ref-card h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.ref-card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 3px; }

.ref-card li {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.ref-card li code {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

/* Article tags */
.article-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 28px 0 12px;
  margin-top: 16px;
  border-top: 1px solid var(--color-border);
}

.article-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 2em;
  background: var(--color-border-muted);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all 0.15s;
}
.article-tag:hover { background: var(--color-border); color: var(--color-text-primary); }
.article-tag.accent { border-color: var(--color-accent); color: var(--color-accent); }

/* ============================================================
   POST DETAIL — Blog post view
   ============================================================ */
.post-detail { max-width: 680px; margin: 0 auto; }

.post-detail .cover-image {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.post-detail header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.post-detail h1 {
  font-family: var(--font-system);
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.post-detail .meta {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-tertiary);
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
}

.post-detail .content {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.post-detail .content h2 {
  font-family: var(--font-system);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 28px 0 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-muted);
}

.post-detail .content h3 {
  font-family: var(--font-system);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 20px 0 6px;
}

.post-detail .content p { margin-bottom: 12px; }
.post-detail .content img { max-width: 100%; border-radius: var(--radius-sm); margin: 16px 0; cursor: zoom-in; }
.post-detail .content blockquote { border-left: 3px solid var(--color-border); margin: 12px 0; padding: 4px 0 4px 16px; color: var(--color-text-secondary); }
.post-detail .content code { font-family: var(--font-mono); font-size: 0.9em; background: var(--color-border-muted); padding: 2px 6px; border-radius: 4px; color: var(--color-text-secondary); }
.post-detail .content pre { background: var(--color-canvas); border: 1px solid var(--color-border); padding: 16px; border-radius: var(--radius-sm); overflow-x: auto; margin: 12px 0; }
.post-detail .content pre code { background: none; padding: 0; color: var(--color-text-secondary); }
.post-detail .content a { color: var(--color-accent); }
.post-detail .content ul, .post-detail .content ol { margin: 8px 0 12px 1.5rem; }
.post-detail .content li { margin-bottom: 4px; }
.post-detail .content hr { border: none; border-top: 1px solid var(--color-border); margin: 24px 0; }

/* Post footer */
.post-footer {
  margin-top: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  display: flex; align-items: center; gap: 12px;
}

.post-footer .author-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-border-muted);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--color-text-secondary); flex-shrink: 0;
}

.post-footer .author-info .name { font-weight: 600; font-size: 13px; }
.post-footer .author-info .desc { font-size: 12px; font-weight: 400; color: var(--color-text-tertiary); }

/* ============================================================
   FOCUS & REDUCED MOTION
   ============================================================ */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 800px) {
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .works-layout { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 700px) {
  .portal { gap: 24px; padding: 48px 20px; }
  .nav-card { padding: 14px; gap: 12px; }
  .nav-card-label { font-size: 14px; }
  .subpage { padding: 40px 20px 0; }
  .subpage-container { max-width: 100%; }
  .subpage-heading { font-size: 24px; }
  .ref-grid { grid-template-columns: 1fr 1fr; }
  .callout { padding: 12px 14px; }
  .code-block { padding: 12px 14px; font-size: 11px; }
}

@media (max-width: 500px) {
  .photo-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .photo-card .card-title { font-size: 12px; }
  .tag-filter-bar { gap: 4px; }
  .tag-pill { font-size: 11px; padding: 4px 10px; }
  .works-layout { gap: 24px; }
  .article-tags { gap: 4px; }
}

@media (max-width: 400px) {
  .portal { gap: 20px; padding: 32px 16px; }
  .brand { font-size: 28px; }
  .nav-card { padding: 12px; gap: 10px; }
  .nav-card-label { font-size: 13px; }
  .subpage { padding: 32px 16px 0; }
  .subpage-heading { font-size: 22px; }
  .subpage-desc { font-size: 13px; }
  .ref-grid { grid-template-columns: 1fr; }
}