/*
 * blog-theme.css — Shared theme system for all blog pages
 * Syncs with the main portfolio's rs-theme localStorage key
 *
 * AI theme   → black & white dot-matrix / terminal aesthetic
 * Human theme → warm organic light, earthy tones
 */

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

/* ── AI Theme (default) — Black & White Dot Matrix ─────────── */
[data-theme="ai"] {
  --bg:       #000000;
  --bg2:      #0a0a0a;
  --card:     #0f0f0f;
  --accent:   #e8e8e8;
  --accent2:  #999999;
  --text:     #d4d4d4;
  --muted:    #555555;
  --border:   #222222;
  --code-bg:  #0a0a0a;
  --nav-bg:   rgba(0,0,0,0.96);
  --progress: linear-gradient(90deg, #fff, #888);
  --tag-bg:   rgba(255,255,255,0.06);
  --tag-color:#b0b0b0;
  --tag-border:rgba(255,255,255,0.15);
  --link:     #cccccc;
  --heading:  #ffffff;
  --lead-border: #666;
  --callout-bg:  rgba(255,255,255,0.04);
  --callout-border: rgba(255,255,255,0.15);
  --callout-left: #888;
  --warn-bg:  rgba(255,255,255,0.04);
  --warn-left:#aaaaaa;
  --cta-bg:   linear-gradient(135deg,rgba(255,255,255,0.05),rgba(255,255,255,0.02));
  --cta-border: rgba(255,255,255,0.2);
  --cta-btn:  linear-gradient(135deg,#fff,#aaa);
  --cta-btn-color: #000;
  --share-twitter-bg: rgba(255,255,255,0.05);
  --share-twitter-border: rgba(255,255,255,0.15);
  --share-twitter-color: #ccc;
  --share-li-bg: rgba(255,255,255,0.05);
  --share-li-border: rgba(255,255,255,0.15);
  --share-li-color: #ccc;
  --author-grad: linear-gradient(135deg,#444,#222);
  --related-hover: rgba(255,255,255,0.05);
  --scrollbar-thumb: #333;
  --check: #aaa;
  --cross: #555;
  --partial: #777;
  --pricing: #888;
  --font-heading: 'JetBrains Mono', monospace;
  --font-body: 'JetBrains Mono', monospace;
  --font-ui: 'JetBrains Mono', monospace;
}

/* Dot-matrix background (AI only) */
[data-theme="ai"] body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.07) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
  z-index: 0;
}

/* Scan-line overlay (AI only) */
[data-theme="ai"] body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0,0,0,0.18) 3px,
    rgba(0,0,0,0.18) 4px
  );
  pointer-events: none;
  z-index: 0;
  animation: scanlines 12s linear infinite;
}

@keyframes scanlines {
  0%   { background-position: 0 0; }
  100% { background-position: 0 100px; }
}

/* AI nav logo terminal blink */
[data-theme="ai"] .nav-logo::after {
  content: '_';
  animation: blink 1s step-end infinite;
  opacity: 0.6;
}
@keyframes blink { 0%,100%{opacity:0.6} 50%{opacity:0} }

/* ── Human Theme — Warm Organic Light ───────────────────────── */
[data-theme="human"] {
  --bg:       #fefaf5;
  --bg2:      #fef5e8;
  --card:     #fffcf5;
  --accent:   #d4631a;
  --accent2:  #8b35c8;
  --text:     #2c1a0a;
  --muted:    #8a6040;
  --border:   rgba(180,100,40,0.2);
  --code-bg:  #faecd6;
  --nav-bg:   rgba(254,250,245,0.95);
  --progress: linear-gradient(90deg,#d4631a,#8b35c8);
  --tag-bg:   rgba(212,99,26,0.1);
  --tag-color:#d4631a;
  --tag-border: rgba(212,99,26,0.3);
  --link:     #d4631a;
  --heading:  #1a0e05;
  --lead-border: #d4631a;
  --callout-bg:  rgba(212,99,26,0.06);
  --callout-border: rgba(212,99,26,0.2);
  --callout-left: #d4631a;
  --warn-bg:  rgba(212,99,26,0.06);
  --warn-left:#c05a10;
  --cta-bg:   linear-gradient(135deg,rgba(212,99,26,0.07),rgba(139,53,200,0.07));
  --cta-border: rgba(212,99,26,0.3);
  --cta-btn:  linear-gradient(135deg,#d4631a,#8b35c8);
  --cta-btn-color: #fff;
  --share-twitter-bg: rgba(29,161,242,0.08);
  --share-twitter-border: rgba(29,161,242,0.25);
  --share-twitter-color: #1da1f2;
  --share-li-bg: rgba(10,102,194,0.08);
  --share-li-border: rgba(10,102,194,0.25);
  --share-li-color: #0a66c2;
  --author-grad: linear-gradient(135deg,#d4631a,#8b35c8);
  --related-hover: rgba(212,99,26,0.06);
  --scrollbar-thumb: #d4631a;
  --check: #1a8b6b;
  --cross: #c0392b;
  --partial: #c05a10;
  --pricing: #1a8b6b;
  --font-heading: 'Syne', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-ui: 'Inter', sans-serif;
}

/* Human warm paper texture */
[data-theme="human"] body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(212,99,26,0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(139,53,200,0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ── Base Styles (shared, uses vars) ────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
  position: relative;
  transition: background 0.4s, color 0.4s;
}

::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 2px; }

/* ── Progress bar ───────────────────────────────────────────── */
#progress-bar {
  position: fixed; top: 0; left: 0;
  height: 2px; width: 0%;
  background: var(--progress);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ── Nav ────────────────────────────────────────────────────── */
nav {
  position: fixed; top: 2px; left: 0; right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 60px;
  display: flex; align-items: center; justify-content: space-between;
  transition: background 0.4s;
}

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem; font-weight: 700;
  color: var(--accent); text-decoration: none;
}

.nav-right { display: flex; align-items: center; gap: 14px; }

.nav-title {
  font-size: 0.78rem; color: var(--muted);
  max-width: 280px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
  font-family: var(--font-ui);
}

.nav-back {
  font-family: var(--font-ui);
  font-size: 0.82rem; color: var(--accent);
  text-decoration: none; font-weight: 600;
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border: 1px solid var(--accent);
  border-radius: 6px; transition: all 0.2s; white-space: nowrap;
  background: transparent;
}

.nav-back:hover { background: var(--accent); color: var(--cta-btn-color); }

/* ── Theme toggle (blog nav) ────────────────────────────────── */
.blog-theme-toggle {
  display: flex; align-items: center; gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 30px; padding: 5px 10px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.blog-theme-toggle:hover { border-color: var(--accent); }

.btt-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; color: var(--accent);
  letter-spacing: 0.06em; user-select: none;
}

.btt-track {
  width: 34px; height: 17px;
  background: rgba(128,128,128,0.15);
  border: 1px solid var(--accent);
  border-radius: 9px; position: relative;
  transition: background 0.3s;
}

.btt-thumb {
  width: 11px; height: 11px;
  background: var(--accent); border-radius: 50%;
  position: absolute; top: 2px; left: 2px;
  transition: left 0.3s; 
}

[data-theme="human"] .btt-thumb { left: 19px; }

/* ── Main content container ─────────────────────────────────── */
main {
  max-width: 780px;
  margin: 0 auto;
  padding: 100px 24px 60px;
  position: relative; z-index: 1;
}

/* ── Article meta ───────────────────────────────────────────── */
.article-meta {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 20px;
  opacity: 0; animation: fadeUp 0.6s ease 0.1s forwards;
}

.tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; font-weight: 600;
  padding: 4px 10px; border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-color); border: 1px solid var(--tag-border);
  letter-spacing: 0.5px; text-transform: uppercase;
}

.tag.alt {
  background: rgba(128,128,128,0.08);
  color: var(--muted); border-color: rgba(128,128,128,0.2);
}

[data-theme="human"] .tag.alt {
  background: rgba(139,53,200,0.08);
  color: #8b35c8; border-color: rgba(139,53,200,0.25);
}

.meta-dot { color: var(--muted); font-size: 0.75rem; }

.meta-text {
  font-size: 0.82rem; color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

/* ── Headings ───────────────────────────────────────────────── */
h1.article-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800; line-height: 1.2; letter-spacing: -0.5px;
  margin-bottom: 20px;
  color: var(--heading);
  opacity: 0; animation: fadeUp 0.6s ease 0.2s forwards;
}

[data-theme="ai"] h1.article-title {
  background: linear-gradient(135deg, #fff 0%, #888 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.article-lead {
  font-size: 1.1rem; color: var(--muted); line-height: 1.75;
  border-left: 3px solid var(--lead-border); padding-left: 20px;
  margin-bottom: 48px;
  opacity: 0; animation: fadeUp 0.6s ease 0.3s forwards;
  font-family: var(--font-body);
}

.article-content { opacity: 0; animation: fadeUp 0.6s ease 0.4s forwards; }

.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.45rem; font-weight: 700; color: var(--heading);
  margin: 48px 0 16px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 700; color: var(--accent);
  margin: 32px 0 12px;
}

.article-content p { margin-bottom: 20px; color: var(--text); opacity: 0.9; }
.article-content a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; }
.article-content ul, .article-content ol { margin: 16px 0 24px 20px; }
.article-content li { margin-bottom: 10px; padding-left: 6px; color: var(--text); opacity: 0.9; }
.article-content strong { color: var(--heading); font-weight: 600; }

/* ── Cards ──────────────────────────────────────────────────── */
.tool-card, .step-card, .tier-card, .principle-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  position: relative; z-index: 1;
}

.tool-card:hover, .step-card:hover, .tier-card:hover, .principle-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

[data-theme="ai"] .tool-card:hover,
[data-theme="ai"] .step-card:hover {
  box-shadow: 0 0 20px rgba(255,255,255,0.05), 0 8px 30px rgba(0,0,0,0.6);
}

[data-theme="human"] .tool-card:hover,
[data-theme="human"] .step-card:hover {
  box-shadow: 0 8px 30px rgba(212,99,26,0.12);
}

.tool-header {
  display: flex; align-items: flex-start; gap: 16px; margin-bottom: 14px;
}

.tool-icon { font-size: 2rem; line-height: 1; flex-shrink: 0; }
.tool-meta { flex: 1; }

.tool-name {
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 700; color: var(--heading); margin-bottom: 4px;
}

.tool-tagline {
  font-size: 0.82rem; color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

.tool-rating { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.star { color: #f59e0b; font-size: 0.85rem; }
[data-theme="ai"] .star { color: #aaa; }

.tool-best-for {
  font-size: 0.82rem; font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  border-radius: 5px; padding: 6px 12px;
  display: inline-block; margin-bottom: 12px;
}

.tool-desc { font-size: 0.92rem; color: var(--muted); line-height: 1.65; }
.tool-pricing {
  margin-top: 12px; font-size: 0.8rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--pricing);
}

/* ── Tables ─────────────────────────────────────────────────── */
.compare-table {
  width: 100%; border-collapse: collapse;
  margin: 24px 0 32px; font-size: 0.85rem;
  border-radius: 10px; overflow: hidden;
  border: 1px solid var(--border);
  position: relative; z-index: 1;
}

.compare-table th {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.8px; color: var(--muted);
  padding: 12px 16px; text-align: left;
  background: var(--card); border-bottom: 1px solid var(--border);
}

.compare-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody tr:hover { background: var(--tag-bg); }
.check { color: var(--check); }
.cross { color: var(--cross); }
.partial { color: var(--partial); }

/* ── Stack combo / flow ─────────────────────────────────────── */
.stack-combo {
  background: var(--callout-bg);
  border: 1px solid var(--callout-border);
  border-radius: 12px; padding: 24px; margin: 32px 0;
  position: relative; z-index: 1;
}

.stack-combo h4 {
  font-family: var(--font-heading);
  font-size: 1rem; font-weight: 700; color: var(--accent); margin-bottom: 16px;
}

.stack-flow { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }

.stack-item {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; padding: 6px 14px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text);
}

.stack-arrow { color: var(--muted); font-size: 1.1rem; }

/* ── Callouts ───────────────────────────────────────────────── */
.callout {
  background: var(--callout-bg);
  border: 1px solid var(--callout-border);
  border-left: 4px solid var(--callout-left);
  border-radius: 8px; padding: 18px 22px; margin: 28px 0;
  position: relative; z-index: 1;
}

.callout.warning {
  background: var(--warn-bg);
  border-color: var(--callout-border);
  border-left-color: var(--warn-left);
}

.callout-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--accent); margin-bottom: 6px;
}

.callout.warning .callout-label { color: var(--warn-left); }
.callout p { color: var(--text); margin: 0; opacity: 0.85; }

/* ── CTA block ──────────────────────────────────────────────── */
.cta-block {
  background: var(--cta-bg);
  border: 1px solid var(--cta-border);
  border-radius: 14px; padding: 36px;
  text-align: center; margin: 48px 0;
  position: relative; z-index: 1;
}

.cta-block h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem; font-weight: 700; color: var(--heading); margin-bottom: 12px;
}

.cta-block p { color: var(--muted); margin-bottom: 24px; }

.cta-btn {
  display: inline-block;
  background: var(--cta-btn);
  color: var(--cta-btn-color); font-weight: 700; font-size: 0.95rem;
  padding: 14px 32px; border-radius: 8px;
  text-decoration: none; transition: all 0.2s;
  font-family: var(--font-ui);
}

.cta-btn:hover { transform: translateY(-2px); opacity: 0.9; }

/* ── Share section ──────────────────────────────────────────── */
.share-section {
  display: flex; align-items: center; gap: 14px;
  margin: 40px 0; padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  position: relative; z-index: 1;
}

.share-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 1px;
}

.share-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 6px;
  font-size: 0.85rem; font-weight: 600;
  text-decoration: none; transition: all 0.2s;
  font-family: var(--font-ui);
}

.share-twitter {
  background: var(--share-twitter-bg);
  border: 1px solid var(--share-twitter-border);
  color: var(--share-twitter-color);
}
.share-twitter:hover { opacity: 0.8; }

.share-linkedin {
  background: var(--share-li-bg);
  border: 1px solid var(--share-li-border);
  color: var(--share-li-color);
}
.share-linkedin:hover { opacity: 0.8; }

/* ── Author card ────────────────────────────────────────────── */
.author-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 32px;
  display: flex; gap: 24px; align-items: flex-start; margin: 48px 0;
  position: relative; z-index: 1;
}

.author-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--author-grad);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading); font-size: 1.5rem; font-weight: 800;
  color: #fff; flex-shrink: 0;
}

.author-info h4 {
  font-family: var(--font-heading); font-size: 1.1rem; font-weight: 700;
  color: var(--heading); margin-bottom: 4px;
}

.author-role {
  font-size: 0.82rem; color: var(--accent);
  font-family: 'JetBrains Mono', monospace; margin-bottom: 12px;
}

.author-bio { font-size: 0.9rem; color: var(--muted); line-height: 1.6; margin-bottom: 16px; }
.author-links { display: flex; gap: 12px; flex-wrap: wrap; }

.author-link {
  font-size: 0.8rem; color: var(--muted); text-decoration: none;
  padding: 5px 12px; border: 1px solid var(--border);
  border-radius: 5px; font-family: 'JetBrains Mono', monospace; transition: all 0.2s;
}

.author-link:hover { color: var(--accent); border-color: var(--accent); }

/* ── Related articles ───────────────────────────────────────── */
.related-section { position: relative; z-index: 1; }

.related-section h3 {
  font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700;
  color: var(--heading); margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.related-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 20px;
  text-decoration: none; transition: all 0.2s; display: block;
}

.related-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  background: var(--related-hover);
}

.related-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 8px;
}

.related-title { font-size: 0.88rem; font-weight: 600; color: var(--heading); line-height: 1.4; }

/* ── Back to top ────────────────────────────────────────────── */
#back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 44px; height: 44px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 1.2rem;
  opacity: 0; pointer-events: none; transition: all 0.3s; z-index: 500;
}

#back-to-top.visible { opacity: 1; pointer-events: auto; }
#back-to-top:hover { background: var(--accent); color: var(--cta-btn-color); transform: translateY(-3px); }

/* ── Footer ─────────────────────────────────────────────────── */
footer {
  text-align: center; padding: 32px 24px;
  color: var(--muted); font-size: 0.82rem;
  border-top: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  position: relative; z-index: 1;
}

/* ── Animations ─────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Code blocks ────────────────────────────────────────────── */
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 4px;
  color: var(--accent);
}

pre {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 20px 24px; margin: 24px 0;
  overflow-x: auto; position: relative; z-index: 1;
}

pre code {
  background: none; border: none; padding: 0;
  font-size: 0.88rem; line-height: 1.7; color: var(--text);
}

/* ── AI theme code label watermark ─────────────────────────── */
[data-theme="ai"] pre::before {
  content: '> ';
  color: var(--muted);
  user-select: none;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  main { padding: 80px 18px 48px; }
  .author-card { flex-direction: column; }
  .nav-title { display: none; }
  .related-grid { grid-template-columns: 1fr; }
  .tool-header { flex-wrap: wrap; }
  .stack-flow { flex-direction: column; align-items: flex-start; }
  .blog-theme-toggle { padding: 4px 8px; }
}