/* ==========================================================================
   Field Notes Blog // Editorial & Technical Stylesheet
   Supports Dark Slate & Warm Editorial Paper themes. Zero dependencies.
   ========================================================================== */

:root,
[data-theme="dark"] {
  --bg-page: #0c111b;
  --bg-card: #131b2b;
  --bg-elevated: #192338;
  --bg-input: #0e1523;
  --text-main: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-subtle: #1e293b;
  --border-strong: #334155;
  --accent-amber: #f59e0b;
  --accent-amber-soft: rgba(245, 158, 11, 0.14);
  --accent-sky: #38bdf8;
  --accent-sky-soft: rgba(56, 189, 248, 0.12);
  --accent-green: #10b981;
  --accent-danger: #ef4444;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

[data-theme="light"] {
  --bg-page: #f8f6f0;
  --bg-card: #EFECE4;
  --bg-elevated: #e5e0d4;
  --bg-input: #ffffff;
  --text-main: #111827;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  --border-subtle: #d6d1c4;
  --border-strong: #b8b1a1;
  --accent-amber: #d97706;
  --accent-amber-soft: rgba(217, 119, 6, 0.12);
  --accent-sky: #0284c7;
  --accent-sky-soft: rgba(2, 132, 199, 0.11);
  --accent-green: #059669;
  --accent-danger: #dc2626;
}

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

/* Header Navigation */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-subtle);
}

.top-bar-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.7rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 7px;
  background: var(--bg-page);
  border: 2px solid var(--accent-amber);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--text-main);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.15;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-item {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 5px;
  border: 1px solid transparent;
}

.nav-item:hover,
.nav-item.active {
  color: var(--text-main);
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.auth-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.32rem 0.65rem;
  border-radius: 5px;
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.online {
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.btn-Action,
.btn-ghost,
.btn-danger {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.42rem 0.8rem;
  border-radius: 5px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.btn-Action {
  background: var(--accent-amber);
  color: #0c111b;
  border: 1px solid var(--accent-amber);
}

.btn-Action:hover {
  filter: brightness(1.08);
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
}

.btn-ghost:hover {
  border-color: var(--accent-sky);
  color: var(--accent-sky);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.14);
  color: var(--accent-danger);
  border: 1px solid var(--accent-danger);
}

.full-width {
  width: 100%;
}

/* Main Two-Column Workspace */
.workspace {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1.5rem;
  align-items: start;
  flex: 1;
}

.masthead-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1.25rem;
}

.masthead-eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.badge-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: var(--accent-amber-soft);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.masthead-card h1 {
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.masthead-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 1.15rem;
}

/* Search & Tag Filter Bar */
.search-filter-bar {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.search-box input {
  width: 100%;
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 0.58rem 0.85rem;
  font-size: 0.86rem;
  font-family: var(--font-sans);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-amber);
}

.tag-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-chip {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 0.3rem 0.65rem;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tag-chip:hover {
  color: var(--text-main);
  border-color: var(--border-strong);
}

.tag-chip.active {
  background: var(--accent-sky-soft);
  color: var(--accent-sky);
  border-color: var(--accent-sky);
}

/* Feed Post Cards */
.feed-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.post-card:hover {
  border-color: var(--accent-sky);
  transform: translateY(-2px);
}

.post-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.post-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.post-card-title button {
  background: none;
  border: none;
  padding: 0;
  text-align: left;
  font: inherit;
  color: var(--text-main);
  cursor: pointer;
}

.post-card-title button:hover {
  color: var(--accent-amber);
}

.post-card-summary {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.9rem;
}

.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}

.mini-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  background: var(--bg-elevated);
  color: var(--accent-sky);
  border: 1px solid var(--border-subtle);
}

.post-card-footer {
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
}

.reaction-group {
  display: flex;
  gap: 0.35rem;
}

.react-btn {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 0.22rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  cursor: pointer;
}

.react-btn:hover,
.react-btn.active {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
}

.card-action-links {
  display: flex;
  gap: 0.35rem;
}

/* Single Post Reader View */
.reader-card,
.editor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.6rem;
}

.reader-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.reader-author-actions {
  display: flex;
  gap: 0.5rem;
}

.reader-meta-top {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-amber);
  margin-bottom: 0.45rem;
}

.reader-title {
  font-size: 1.75rem;
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 0.65rem;
}

.reader-summary {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

.reader-tags {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.reader-divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 1.25rem 0;
}

.markdown-rendered h2 {
  font-size: 1.25rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--text-main);
}

.markdown-rendered h3 {
  font-size: 1.05rem;
  margin: 1rem 0 0.4rem;
}

.markdown-rendered p {
  margin-bottom: 0.9rem;
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.markdown-rendered ul {
  margin: 0.5rem 0 1rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.markdown-rendered li {
  margin-bottom: 0.35rem;
}

.markdown-rendered pre {
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-sky);
  margin-bottom: 1rem;
}

.markdown-rendered code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--bg-page);
  padding: 0.12rem 0.35rem;
  border-radius: 3px;
  border: 1px solid var(--border-subtle);
}

.reader-reactions-bar {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Split-Pane Editor */
.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.eyebrow-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-amber);
  font-weight: 600;
}

.estimator-pill {
  display: inline-flex;
  gap: 0.45rem;
  background: var(--bg-page);
  border: 1px solid var(--accent-sky);
  color: var(--accent-sky);
  padding: 0.35rem 0.75rem;
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

.editor-form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.form-row-two {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0.9rem;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field-group label {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.field-group input,
.field-group textarea {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  padding: 0.5rem 0.7rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

.split-editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}

.split-pane {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.pane-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.split-pane textarea {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  resize: vertical;
  min-height: 270px;
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  padding: 0.65rem;
}

.preview-box {
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  border-radius: 5px;
  padding: 0.75rem;
  min-height: 270px;
  max-height: 360px;
  overflow-y: auto;
}

.editor-footer-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.65rem;
  padding-top: 0.5rem;
}

/* Sidebar Cards */
.sidebar-column {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.15rem 1.25rem;
}

.card-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-amber);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.sidebar-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.sidebar-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
  margin-bottom: 0.8rem;
}

.auth-tab {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem;
  border-radius: 4px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.auth-tab.active {
  background: var(--accent-amber-soft);
  color: var(--accent-amber);
  border-color: var(--accent-amber);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.auth-feedback {
  font-size: 0.76rem;
  color: var(--accent-amber);
  font-family: var(--font-mono);
}

.demo-creds-box {
  margin-top: 0.85rem;
  padding: 0.55rem 0.7rem;
  background: var(--bg-page);
  border: 1px dashed var(--border-strong);
  border-radius: 5px;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-size: 0.73rem;
  color: var(--text-secondary);
}

.demo-creds-box code {
  font-family: var(--font-mono);
  color: var(--accent-sky);
  font-weight: 600;
}

.logged-in-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bookmark-list,
.arch-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.bookmark-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0.55rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
}

.bookmark-item button {
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 0.78rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.bookmark-item button:hover {
  color: var(--accent-amber);
}

.arch-list code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-sky);
}

.reset-data-btn {
  margin-top: 0.85rem;
}

/* About Page Styles */
.about-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  flex: 1;
}

.about-sheet {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 2rem;
}

.about-sheet h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.about-lead {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.about-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 1.25rem;
}

.about-box h2 {
  font-size: 1.15rem;
  margin-bottom: 0.65rem;
}

.about-box p,
.about-box li {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.about-box ul {
  padding-left: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.5rem;
}

.feature-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 0.85rem;
}

.matrix-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 1rem;
}

.matrix-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-amber);
  font-weight: 700;
}

.matrix-item h3 {
  font-size: 0.96rem;
  margin: 0.25rem 0 0.4rem;
}

/* Footer */
.blog-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-card);
  padding: 1.1rem 1.5rem;
}

.footer-wrap {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
  }
  .feed-list,
  .split-editor-grid,
  .about-grid,
  .feature-matrix {
    grid-template-columns: 1fr;
  }
}