/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --bg: #030712;
  --surface: #0a1628;
  --surface-deep: #060f1a;
  --teal: #2dd4bf;
  --teal-dim: #2dd4bf0d;
  --teal-border: #2dd4bf22;
  --teal-border-hover: #2dd4bf44;
  --teal-glow: 0 0 24px #2dd4bf44, 0 0 48px #2dd4bf18;
  --text: #cbd5e1;
  --text-bright: #f1f5f9;
  --text-title: #f8fafc;
  --muted: #64748b;
  --muted-deep: #475569;
  --border: #2dd4bf18;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;
}

/* ===========================
   Reset
   =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--font-sans); line-height: 1.6; min-height: 100vh; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ===========================
   Navigation
   =========================== */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(3, 7, 18, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
}
.nav-logo {
  color: var(--teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-shadow: 0 0 12px rgba(45, 212, 191, 0.4);
}
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--muted); font-size: 13px; transition: color 0.2s; }
.nav-links a:hover { color: var(--teal); }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-lang { display: flex; gap: 6px; }
.lang-btn {
  padding: 4px 10px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}
.lang-btn.active { background: var(--teal); color: var(--bg); }
.lang-btn:not(.active) { background: transparent; border: 1px solid var(--teal-border-hover); color: #5eead4; }
.nav-menu { display: none; background: transparent; border: none; color: var(--teal); font-size: 20px; cursor: pointer; padding: 4px; }

/* ===========================
   Avatar
   =========================== */
.avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), #0d9488);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  font-weight: 800;
  color: var(--bg);
  box-shadow: var(--teal-glow);
  flex-shrink: 0;
}
.avatar-sm {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), #0d9488);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  color: var(--bg);
  box-shadow: 0 0 10px rgba(45, 212, 191, 0.3);
  flex-shrink: 0;
}

/* ===========================
   Hero (Homepage)
   =========================== */
.hero {
  padding: 72px 40px 56px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -60px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle at 70% 30%, rgba(45, 212, 191, 0.06), transparent 70%);
  pointer-events: none;
}

/* Hero two-column split */
.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-left { position: relative; z-index: 1; }
.hero-right { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; }

/* Hero code card */
.hero-code-card {
  background: var(--surface-deep);
  border: 1px solid var(--teal-border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(45,212,191,0.08), 0 20px 60px rgba(0,0,0,0.4);
  width: 100%;
  max-width: 480px;
}
.hero-code-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--teal-border);
}
.hero-code-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.hero-code-filename { color: var(--muted); font-size: 12px; font-family: var(--font-mono); margin-left: 8px; }
.hero-code-body {
  margin: 0;
  padding: 20px 22px;
  font-size: 13px;
  line-height: 1.7;
  font-family: var(--font-mono);
  overflow-x: auto;
  background: var(--surface-deep);
  border: none;
  border-radius: 0;
}
.hero-code-body code { background: none; border: none; padding: 0; font-size: inherit; color: #94a3b8; }
.hero-c-kw { color: #a78bfa; }
.hero-c-fn { color: #38bdf8; }
.hero-c-str { color: #86efac; }
.hero-c-num { color: #fb923c; }
.hero-c-cm { color: #475569; }

.hero-identity { display: flex; align-items: center; gap: 20px; margin-bottom: 28px; }
.hero-name { color: var(--text-bright); font-size: 16px; font-weight: 700; }
.hero-role { color: #5eead4; font-size: 10px; letter-spacing: 2px; margin-top: 3px; }
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-title);
  margin-bottom: 16px;
}
.hero h1 em {
  font-style: normal;
  color: var(--teal);
  text-shadow: 0 0 20px rgba(45, 212, 191, 0.4);
}
.hero-sub { color: var(--muted); font-size: 16px; line-height: 1.75; margin-bottom: 28px; }
.hero-divider { width: 48px; height: 2px; background: linear-gradient(90deg, var(--teal), transparent); margin-bottom: 20px; }
.hero-stats { display: flex; gap: 28px; margin-bottom: 32px; }
.stat-num { color: var(--teal); font-size: 20px; font-weight: 800; display: block; }
.stat-label { color: var(--muted-deep); font-size: 11px; letter-spacing: 1px; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* ===========================
   Buttons
   =========================== */
.btn-primary {
  background: var(--teal);
  color: var(--bg);
  padding: 10px 22px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 700;
  display: inline-block;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.9; }
.btn-secondary {
  border: 1px solid var(--teal-border-hover);
  color: #5eead4;
  padding: 10px 22px;
  border-radius: 4px;
  font-size: 13px;
  display: inline-block;
  transition: border-color 0.2s;
}
.btn-secondary:hover { border-color: var(--teal); }

/* ===========================
   Category Tags Strip
   =========================== */
.tags-strip { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 40px 40px; }
.tag-pill {
  border: 1px solid var(--teal-border-hover);
  color: #5eead4;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 11px;
  letter-spacing: 1px;
  transition: background 0.2s;
}
.tag-pill:hover { background: var(--teal-dim); }

/* ===========================
   Section
   =========================== */
.section { padding: 0 40px 64px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.section-title { color: var(--text-bright); font-size: 18px; font-weight: 700; }
.section-link { color: var(--teal); font-size: 13px; }
.section-link:hover { text-decoration: underline; }

/* ===========================
   Post Cards Grid
   =========================== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  transition: border-color 0.2s;
  display: flex;
  flex-direction: column;
}
.post-card:hover { border-color: var(--teal-border-hover); }
.post-card.featured { grid-column: span 2; background: linear-gradient(135deg, var(--surface), rgba(4, 47, 46, 0.15)); }
.post-card-cat { color: var(--teal); font-size: 10px; letter-spacing: 2px; margin-bottom: 10px; }
.post-card-title { color: var(--text-bright); font-size: 14px; font-weight: 600; line-height: 1.45; margin-bottom: 10px; }
.post-card.featured .post-card-title { font-size: 18px; }
.post-card-excerpt { color: var(--muted); font-size: 12px; line-height: 1.65; flex-grow: 1; margin-bottom: 14px; }
.post-card-meta { display: flex; justify-content: space-between; align-items: center; }
.post-card-date { color: var(--muted-deep); font-size: 11px; }
.post-card-read { color: var(--teal); font-size: 11px; }

/* ===========================
   Post Page Layout
   =========================== */
.post-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 64px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 52px 40px 100px;
}

/* Breadcrumb */
.breadcrumb { color: var(--muted-deep); font-size: 12px; margin-bottom: 16px; }
.breadcrumb a { color: var(--teal); }

/* Post header */
.post-category { color: var(--teal); font-size: 10px; letter-spacing: 3px; margin-bottom: 14px; }
.post-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-title);
  margin-bottom: 20px;
}
.post-title em { font-style: normal; color: var(--teal); text-shadow: 0 0 16px rgba(45, 212, 191, 0.35); }

/* Post meta row */
.post-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}
.post-author { display: flex; align-items: center; gap: 10px; }
.post-author-name { color: var(--text-bright); font-size: 13px; font-weight: 600; }
.post-meta-item { color: var(--muted); font-size: 13px; }
.post-meta-dot { color: var(--muted-deep); }
.post-lang-link { color: #5eead4; font-size: 13px; }
.post-lang-link:hover { text-decoration: underline; }

/* Article body */
.article-body { color: var(--text); font-size: 16px; line-height: 1.85; }
.article-body p { margin-bottom: 20px; }
.article-body h2 {
  color: var(--text-bright);
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 14px;
  padding-left: 16px;
  border-left: 3px solid var(--teal);
}
.article-body h3 { color: var(--text-bright); font-size: 18px; font-weight: 600; margin: 28px 0 10px; }
.article-body strong { color: var(--text-bright); }
.article-body a { color: var(--teal); text-decoration: underline; text-decoration-color: var(--teal-border-hover); }
.article-body a:hover { text-decoration-color: var(--teal); }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 20px; }
.article-body li { margin-bottom: 6px; }
.article-body code {
  background: var(--surface);
  border: 1px solid var(--teal-border);
  color: #7dd3fc;
  padding: 2px 7px;
  border-radius: 3px;
  font-size: 14px;
  font-family: var(--font-mono);
}
.article-body pre {
  background: var(--surface-deep);
  border: 1px solid var(--teal-border);
  border-radius: 8px;
  padding: 22px 24px;
  margin: 24px 0;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
}
.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: #7dd3fc;
  font-size: inherit;
}

/* Callout */
.callout {
  background: var(--teal-dim);
  border: 1px solid rgba(45, 212, 191, 0.2);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 28px 0;
}
.callout-label { color: var(--teal); font-size: 10px; letter-spacing: 2px; font-weight: 700; margin-bottom: 8px; }
.callout p { color: var(--muted); font-size: 15px; margin: 0; line-height: 1.7; }

/* Post tags */
.post-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border); }

/* ===========================
   Sidebar
   =========================== */
.sidebar { padding-top: 4px; }
.sidebar-title { color: var(--muted-deep); font-size: 10px; letter-spacing: 2px; font-weight: 600; margin-bottom: 14px; }
.toc-list { list-style: none; margin-bottom: 32px; }
.toc-item { display: flex; align-items: flex-start; gap: 10px; padding: 7px 0; border-bottom: 1px solid #0f172a; }
.toc-num { color: var(--teal); font-size: 10px; font-weight: 700; margin-top: 2px; flex-shrink: 0; }
.toc-link { color: var(--muted); font-size: 13px; line-height: 1.4; text-decoration: none; }
.toc-link:hover { color: var(--text); }
.related-card { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 14px; margin-bottom: 8px; transition: border-color 0.2s; }
.related-card:hover { border-color: var(--teal-border-hover); }
.related-cat { color: var(--teal); font-size: 9px; letter-spacing: 2px; margin-bottom: 5px; }
.related-title { color: var(--muted); font-size: 13px; line-height: 1.4; }
.related-title:hover { color: var(--text-bright); }

/* ===========================
   Blog Listing
   =========================== */
.blog-header { padding: 52px 40px 32px; max-width: 680px; }
.blog-header h1 { font-size: 36px; font-weight: 800; color: var(--text-title); margin-bottom: 12px; }
.blog-header p { color: var(--muted); font-size: 16px; }
.blog-filters { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 40px 32px; }
.filter-btn {
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 12px;
  background: transparent;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.2s;
}
.filter-btn:hover, .filter-btn.active { border-color: var(--teal); color: var(--teal); }
.blog-list { padding: 0 40px 80px; display: flex; flex-direction: column; gap: 1px; }
.blog-list-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.blog-list-item:hover .blog-list-title { color: var(--teal); }
.blog-list-cat { color: var(--teal); font-size: 10px; letter-spacing: 2px; flex-shrink: 0; width: 140px; }
.blog-list-content { flex-grow: 1; }
.blog-list-title { color: var(--text-bright); font-size: 16px; font-weight: 600; margin-bottom: 4px; transition: color 0.2s; }
.blog-list-excerpt { color: var(--muted); font-size: 13px; line-height: 1.55; }
.blog-list-meta { flex-shrink: 0; text-align: right; }
.blog-list-date { color: var(--muted-deep); font-size: 12px; display: block; }
.blog-list-read { color: var(--muted-deep); font-size: 11px; }

/* ===========================
   Generic Page
   =========================== */
.page-layout { max-width: 960px; margin: 0 auto; padding: 60px 40px 100px; }
.page-layout h1 { font-size: 36px; font-weight: 800; color: var(--text-title); margin-bottom: 12px; }
.page-layout .page-sub { color: var(--muted); font-size: 16px; margin-bottom: 40px; }
.page-layout h2 { color: var(--text-bright); font-size: 20px; font-weight: 700; margin: 36px 0 12px; padding-left: 14px; border-left: 3px solid var(--teal); }
.page-layout p { color: var(--text); font-size: 16px; line-height: 1.8; margin-bottom: 16px; }
.page-divider { height: 1px; background: var(--border); margin: 36px 0; }

/* Tool card */
.tool-card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 20px 24px; margin-bottom: 12px; transition: border-color 0.2s; }
.tool-card:hover { border-color: var(--teal-border-hover); }
.tool-card-name { color: var(--text-bright); font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.tool-card-name a { color: var(--teal); }
.tool-card-desc { color: var(--muted); font-size: 14px; line-height: 1.6; }
.tool-card-link { text-decoration: none; display: block; }
.tool-card-featured { display: flex; align-items: center; gap: 16px; }
.tool-card-featured:hover { border-color: var(--teal); }
.tool-card-icon { font-size: 24px; flex-shrink: 0; }
.tool-card-arrow { color: var(--teal); font-size: 18px; margin-left: auto; flex-shrink: 0; }

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo { color: var(--teal); font-size: 11px; letter-spacing: 3px; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--muted-deep); font-size: 13px; }
.footer-links a:hover { color: var(--text); }
.footer-copy { color: var(--muted-deep); font-size: 12px; width: 100%; text-align: center; padding-top: 8px; border-top: 1px solid var(--border); margin-top: 8px; }

/* ===========================
   Responsive ≤768px
   =========================== */
@media (max-width: 768px) {
  .nav { padding: 16px 20px; }
  .nav-links { display: none; }
  .nav-menu { display: block; }

  .hero { padding: 40px 20px 40px; }
  .hero-split { grid-template-columns: 1fr; gap: 32px; }
  .hero-right { display: none; }
  .hero h1 { font-size: 26px; }
  .hero-sub { font-size: 15px; }
  .hero-stats { gap: 16px; }

  .tags-strip { padding: 0 20px 32px; }
  .section { padding: 0 20px 48px; }

  .posts-grid { grid-template-columns: 1fr; }
  .post-card.featured { grid-column: span 1; }

  .post-layout { grid-template-columns: 1fr; gap: 0; padding: 32px 20px 60px; }
  .post-title { font-size: 26px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 19px; }
  .article-body pre { font-size: 12px; padding: 16px; }
  .post-meta-dot { display: none; }
  .sidebar { border-top: 1px solid var(--border); padding-top: 32px; margin-top: 16px; }

  .blog-header { padding: 40px 20px 24px; }
  .blog-header h1 { font-size: 28px; }
  .blog-filters { padding: 0 20px 24px; }
  .blog-list { padding: 0 20px 60px; }
  .blog-list-item { flex-direction: column; gap: 6px; }
  .blog-list-cat { width: auto; }
  .blog-list-meta { text-align: left; }

  .page-layout { padding: 40px 20px 60px; max-width: 100%; }
  .page-layout h1 { font-size: 28px; }

  .footer { padding: 24px 20px; flex-direction: column; align-items: flex-start; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .post-cta { flex-direction: column; align-items: flex-start; }
  #back-to-top { bottom: 20px; right: 20px; }
}

/* ===========================
   Responsive ≤480px
   =========================== */
@media (max-width: 480px) {
  .nav { padding: 14px 16px; }
  .hero { padding: 32px 16px 32px; }
  .hero h1 { font-size: 22px; }
  .section { padding: 0 16px 40px; }
  .tags-strip { padding: 0 16px 24px; }
  .post-layout { padding: 24px 16px 48px; }
  .post-title { font-size: 22px; }
  .blog-header { padding: 32px 16px 20px; }
  .blog-filters { padding: 0 16px 20px; }
  .blog-list { padding: 0 16px 48px; }
  .page-layout { padding: 32px 16px 48px; }
  .footer { padding: 20px 16px; }
}

/* ===========================
   Syntax Highlight (Prism override)
   Matches teal-on-dark theme
   =========================== */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #475569; }
.token.punctuation { color: #94a3b8; }
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol { color: #5eead4; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin { color: #86efac; }
.token.operator, .token.entity, .token.url { color: #e2e8f0; }
.token.atrule, .token.attr-value, .token.keyword { color: #a78bfa; }
.token.function { color: #38bdf8; }
.token.regex, .token.important, .token.variable { color: #fb923c; }

/* ===========================
   Read Progress Bar
   =========================== */
#read-progress-wrap { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: transparent; z-index: 100; }
#read-progress { height: 100%; width: 0%; background: var(--teal); box-shadow: 0 0 8px #2dd4bf66; transition: width 0.1s linear; }

/* ===========================
   Back to Top
   =========================== */
#back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  background: var(--surface); border: 1px solid var(--teal-border);
  color: var(--teal); width: 44px; height: 44px; border-radius: 50%;
  font-size: 18px; cursor: pointer; opacity: 0; pointer-events: none;
  transition: opacity 0.2s, box-shadow 0.2s;
  display: flex; align-items: center; justify-content: center;
}
#back-to-top.visible { opacity: 1; pointer-events: auto; }
#back-to-top:hover { box-shadow: var(--teal-glow); }

/* ===========================
   Share Buttons
   =========================== */
.share-row { display: flex; align-items: center; gap: 10px; margin: 28px 0 20px; flex-wrap: wrap; }
.share-label { color: var(--muted); font-size: 13px; }
.share-btn { padding: 6px 16px; border-radius: 20px; font-size: 12px; font-weight: 600; text-decoration: none; transition: all 0.2s; }
.share-x { border: 1px solid #ffffff22; color: #e2e8f0; }
.share-x:hover { background: #ffffff11; }
.share-li { border: 1px solid #0077b522; color: #38bdf8; }
.share-li:hover { background: #0077b511; }

/* ===========================
   Post CTA Banner
   =========================== */
.post-cta {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  background: var(--surface); border: 1px solid #2dd4bf22;
  border-left: 3px solid var(--teal);
  border-radius: 8px; padding: 24px 28px; margin-top: 36px;
}
.post-cta-text { display: flex; flex-direction: column; gap: 4px; }
.post-cta-text strong { color: var(--text-bright); font-size: 16px; }
.post-cta-text span { color: var(--muted); font-size: 14px; }

/* ===========================
   Testimonials
   =========================== */
.testimonials-section { border-top: 1px solid var(--border); padding-top: 48px; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.testimonial-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 24px; display: flex; flex-direction: column; gap: 20px;
  transition: border-color 0.2s;
}
.testimonial-card:hover { border-color: #2dd4bf33; }
.testimonial-text { color: var(--text); font-size: 14px; line-height: 1.75; font-style: italic; flex-grow: 1; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, #2dd4bf, #0d9488);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 800; color: #030712; flex-shrink: 0;
}
.testimonial-name { color: var(--text-bright); font-size: 13px; font-weight: 600; }
.testimonial-role { color: var(--muted); font-size: 12px; }

/* ===========================
   FAQ Accordion
   =========================== */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary {
  list-style: none;
  padding: 18px 0;
  color: var(--text-bright);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; color: var(--teal); font-size: 20px; flex-shrink: 0; transition: transform 0.2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--text); font-size: 15px; line-height: 1.8; padding-bottom: 18px; margin: 0; }

/* ===========================
   Contact Form
   =========================== */
.contact-form { margin-top: 32px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; color: var(--text-bright); font-size: 13px; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 8px; }
.form-group input,
.form-group textarea,
.form-group select {
  display: block;
  width: 100%;
  background: var(--surface);
  border: 1px solid #2dd4bf22;
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  padding: 12px 16px;
  transition: border-color 0.2s;
  outline: none;
  box-sizing: border-box;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--teal); }
.form-group textarea { resize: vertical; min-height: 140px; line-height: 1.6; }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--surface); }
.form-submit { margin-top: 8px; }
.form-notice { color: var(--muted); font-size: 13px; margin-top: 12px; }
.form-success {
  display: none;
  background: #2dd4bf0a;
  border: 1px solid #2dd4bf33;
  border-radius: 8px;
  color: var(--teal);
  padding: 16px 20px;
  font-size: 15px;
  margin-top: 20px;
}
.form-error {
  display: none;
  background: #ef44440a;
  border: 1px solid #ef444433;
  border-radius: 8px;
  color: #f87171;
  padding: 16px 20px;
  font-size: 15px;
  margin-top: 20px;
}

/* ===========================
   Mobile Nav Overlay (JS-controlled)
   =========================== */
.nav-mobile-open .nav-links {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 57px;
  left: 0;
  right: 0;
  background: rgba(3, 7, 18, 0.97);
  border-bottom: 1px solid var(--border);
  padding: 20px 20px 24px;
  gap: 16px;
  z-index: 99;
}

/* ===========================
   Theme Toggle Button
   =========================== */
.nav-theme {
  background: transparent;
  border: 1px solid var(--teal-border-hover);
  color: var(--teal);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  flex-shrink: 0;
}
.nav-theme:hover { background: var(--teal-dim); }

/* ===========================
   Light Theme
   =========================== */
html.light {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-deep: #f1f5f9;
  --text: #334155;
  --text-bright: #0f172a;
  --text-title: #0f172a;
  --muted: #64748b;
  --muted-deep: #94a3b8;
  --border: #e2e8f0;
  --teal-dim: rgba(45, 212, 191, 0.08);
  --teal-border: rgba(45, 212, 191, 0.3);
  --teal-border-hover: rgba(45, 212, 191, 0.5);
}
html.light body { background: var(--bg); }
html.light .nav { background: rgba(248, 250, 252, 0.95); }
html.light .nav-mobile-open .nav-links { background: rgba(248, 250, 252, 0.99); }
html.light .article-body code { background: #f1f5f9; border-color: #e2e8f0; color: #0369a1; }
html.light .article-body pre { background: #f1f5f9; border-color: #e2e8f0; }
html.light .article-body pre code { color: #0369a1; }

/* ===========================
   Blog Search
   =========================== */
.blog-search-wrap { padding: 0 40px 20px; }
.blog-search-input {
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border: 1px solid var(--teal-border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 10px 16px;
  outline: none;
  transition: border-color 0.2s;
}
.blog-search-input:focus { border-color: var(--teal); }
.blog-search-input::placeholder { color: var(--muted-deep); }

/* ===========================
   Pagination
   =========================== */
.pagination {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 40px 60px;
  justify-content: center;
}
.page-btn {
  border: 1px solid var(--teal-border-hover);
  color: #5eead4;
  padding: 8px 20px;
  border-radius: 4px;
  font-size: 13px;
  transition: background 0.2s;
}
.page-btn:hover { background: var(--teal-dim); }
.page-btn.disabled { border-color: var(--border); color: var(--muted-deep); cursor: default; pointer-events: none; }
.page-info { color: var(--muted); font-size: 13px; }

/* ===========================
   Case Studies (Portfolio)
   =========================== */
.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  margin-bottom: 16px;
  transition: border-color 0.2s;
}
.case-card:hover { border-color: var(--teal-border-hover); }
.case-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 14px; }
.case-tag { color: var(--teal); font-size: 10px; letter-spacing: 2px; margin-bottom: 5px; }
.case-name { color: var(--text-bright); font-size: 20px; font-weight: 700; }
.case-link { color: var(--teal); font-size: 13px; flex-shrink: 0; white-space: nowrap; }
.case-link:hover { text-decoration: underline; }
.case-desc { color: var(--text); font-size: 15px; line-height: 1.75; margin-bottom: 16px; }
.case-stack { display: flex; gap: 8px; flex-wrap: wrap; }
.case-pill {
  border: 1px solid var(--teal-border);
  color: #5eead4;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
}

/* ===========================
   404 Page
   =========================== */
.error-page {
  max-width: 540px;
  margin: 0 auto;
  padding: 100px 40px;
  text-align: center;
}
.error-code {
  font-size: 96px;
  font-weight: 800;
  color: var(--teal);
  line-height: 1;
  margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(45,212,191,0.3);
}
.error-title { color: var(--text-bright); font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.error-sub { color: var(--muted); font-size: 16px; line-height: 1.7; margin-bottom: 32px; }
.error-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ===========================
   Sticky TOC Sidebar
   =========================== */
.sidebar-sticky {
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--teal-border) transparent;
}

/* ===========================
   Prev / Next Post Nav
   =========================== */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.post-nav-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  transition: border-color 0.2s;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.post-nav-item:hover { border-color: var(--teal-border-hover); }
.post-nav-next { text-align: right; }
.post-nav-label { color: var(--teal); font-size: 11px; letter-spacing: 1px; }
.post-nav-title { color: var(--text-bright); font-size: 14px; font-weight: 600; line-height: 1.4; }

/* ===========================
   Copy Code Button
   =========================== */
.copy-code-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--surface);
  border: 1px solid var(--teal-border);
  color: var(--teal);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--font-sans);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
  z-index: 2;
}
.article-body pre:hover .copy-code-btn { opacity: 1; }
.copy-code-btn:hover { background: var(--teal-dim); }

/* ===========================
   Hero code line animations
   =========================== */
.cl {
  display: block;
  opacity: 0;
  transform: translateX(-6px);
  animation: lineReveal 0.25s ease forwards;
}
@keyframes lineReveal {
  to { opacity: 1; transform: translateX(0); }
}
.cl1  { animation-delay: 0.4s; }
.cl2  { animation-delay: 0.5s; }
.cl3  { animation-delay: 0.55s; }
.cl4  { animation-delay: 0.6s; }
.cl5  { animation-delay: 0.65s; }
.cl6  { animation-delay: 0.7s; }
.cl7  { animation-delay: 0.75s; }
.cl8  { animation-delay: 0.8s; }
.cl9  { animation-delay: 0.85s; }
.cl10 { animation-delay: 0.9s; }
.cl11 { animation-delay: 0.95s; }
.cl12 { animation-delay: 1.0s; }
.cl13 { animation-delay: 1.05s; }
.cl14 { animation-delay: 1.1s; }
.cl15 { animation-delay: 1.15s; }
.cl16 { animation-delay: 1.2s; }
.cl17 { animation-delay: 1.25s; }
.cl18 { animation-delay: 1.3s; }

.hero-cursor {
  color: var(--teal);
  animation: blink 1s step-end infinite;
  animation-delay: 1.5s;
  opacity: 0;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ===========================
   About Page
   =========================== */
.about-hero {
  padding: 64px 40px 0;
  position: relative;
  overflow: hidden;
}
.about-hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(45,212,191,0.06), transparent 60%);
  pointer-events: none;
}
.about-hero-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: 960px;
  position: relative;
  z-index: 1;
}
.about-avatar-wrap { position: relative; flex-shrink: 0; }
.about-avatar {
  width: 100px; height: 100px; border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), #0d9488);
  display: flex; align-items: center; justify-content: center;
  font-size: 40px; font-weight: 800; color: var(--bg);
  box-shadow: var(--teal-glow);
  position: relative; z-index: 1;
}
.about-avatar-glow {
  position: absolute; inset: -8px; border-radius: 50%;
  background: radial-gradient(circle, rgba(45,212,191,0.15), transparent 70%);
  animation: avatarPulse 3s ease-in-out infinite;
}
@keyframes avatarPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.6; }
}
.about-tag { color: var(--teal); font-size: 10px; letter-spacing: 3px; font-weight: 600; margin-bottom: 8px; }
.about-name { font-size: 40px; font-weight: 800; color: var(--text-title); line-height: 1.1; margin-bottom: 14px; }
.about-bio { color: var(--muted); font-size: 16px; line-height: 1.75; max-width: 520px; margin-bottom: 20px; }
.about-links { display: flex; gap: 12px; flex-wrap: wrap; }
.about-link {
  border: 1px solid var(--teal-border-hover); color: #5eead4;
  padding: 5px 14px; border-radius: 20px; font-size: 12px;
  transition: background 0.2s;
}
.about-link:hover { background: var(--teal-dim); }

.about-stats-bar {
  display: flex; gap: 0;
  margin: 40px 0 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
  max-width: 100%;
  overflow-x: auto;
}
.about-stat {
  flex: 1; min-width: 120px;
  padding: 24px 20px;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 4px;
}
.about-stat:last-child { border-right: none; }
.about-stat-num { color: var(--teal); font-size: 22px; font-weight: 800; }
.about-stat-label { color: var(--muted-deep); font-size: 10px; letter-spacing: 1.5px; }

.about-body { max-width: 960px; padding: 56px 40px 100px; }
.about-section { margin-bottom: 56px; }
.about-section-title {
  color: var(--text-bright); font-size: 20px; font-weight: 700;
  margin-bottom: 24px; padding-left: 14px;
  border-left: 3px solid var(--teal);
}

.about-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.about-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.about-card:hover { border-color: var(--teal-border-hover); transform: translateY(-2px); }
.about-card-icon { font-size: 24px; margin-bottom: 12px; }
.about-card-name { color: var(--text-bright); font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.about-card-desc { color: var(--muted); font-size: 14px; line-height: 1.7; }

.about-prose p { color: var(--text); font-size: 16px; line-height: 1.85; margin-bottom: 18px; max-width: 680px; }
.about-prose p em { font-style: italic; color: var(--text-bright); }

.about-stack-groups { display: flex; flex-direction: column; gap: 20px; }
.about-stack-group { display: flex; align-items: flex-start; gap: 20px; }
.about-stack-label {
  color: var(--muted-deep); font-size: 10px; letter-spacing: 2px;
  font-weight: 600; min-width: 40px; padding-top: 6px;
}
.about-stack-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.about-pill {
  border: 1px solid var(--border); color: var(--muted);
  padding: 4px 12px; border-radius: 20px; font-size: 12px;
}
.about-pill-teal { border-color: var(--teal-border-hover); color: #5eead4; }

.about-cta {
  background: var(--surface);
  border: 1px solid var(--teal-border);
  border-radius: 12px;
  padding: 40px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.about-cta::before {
  content: "";
  position: absolute; top: 0; left: 0; width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--teal), #0d9488);
}
.about-cta h2 { color: var(--text-bright); font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.about-cta p { color: var(--muted); font-size: 15px; line-height: 1.7; }
.about-cta-actions { display: flex; gap: 12px; flex-shrink: 0; }

/* ===========================
   Responsive additions
   =========================== */
@media (max-width: 768px) {
  .blog-search-wrap { padding: 0 20px 16px; }
  .blog-search-input { max-width: 100%; }
  .pagination { padding: 20px 20px 48px; }
  .case-header { flex-direction: column; gap: 8px; }
  .error-page { padding: 60px 20px; }
  .error-code { font-size: 72px; }
}
@media (max-width: 480px) {
  .blog-search-wrap { padding: 0 16px 12px; }
  .pagination { padding: 16px 16px 40px; }
}

/* ===========================
   TOC colapsable (móvil)
   =========================== */
.toc-details { margin-bottom: 32px; }
.toc-details > summary { display: none; }
.toc-details .toc-list { margin-bottom: 0; }

@media (max-width: 768px) {
  .toc-details > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    list-style: none;
    color: var(--muted-deep);
    font-size: 10px;
    letter-spacing: 2px;
    font-weight: 600;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0;
    user-select: none;
  }
  .toc-details > summary::-webkit-details-marker { display: none; }
  .toc-details:not([open]) .toc-chevron { transform: rotate(-90deg); }
  .toc-chevron { color: var(--teal); font-size: 12px; transition: transform 0.2s; display: inline-block; }
  .toc-details[open] .toc-list { margin-top: 4px; }
}

/* ===========================
   Uses — grid con iconos
   =========================== */
.uses-section { margin-bottom: 48px; }
.uses-section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.uses-section-icon { font-size: 16px; }
.uses-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.uses-item {
  display: flex;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  transition: border-color 0.2s;
}
.uses-item:hover { border-color: var(--teal-border-hover); }
.uses-icon {
  font-size: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}
.uses-content { flex: 1; min-width: 0; }
.uses-header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.uses-name {
  color: var(--text-bright);
  font-size: 15px;
  font-weight: 600;
}
.uses-name a { color: var(--teal); text-decoration: none; }
.uses-name a:hover { text-decoration: underline; }
.uses-badge {
  background: rgba(45,212,191,0.1);
  color: var(--teal);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid rgba(45,212,191,0.25);
}
.uses-desc { color: var(--muted); font-size: 13px; line-height: 1.6; }

@media (max-width: 768px) {
  .uses-grid { grid-template-columns: 1fr; }
}
/* ===========================
   Tool pages (calculadora, wizard)
   =========================== */
.tool-page { max-width: 760px; margin: 0 auto; padding: 48px 24px 80px; }
.tool-page-header { text-align: center; margin-bottom: 48px; }
.tool-page-tag { color: var(--teal); font-size: 10px; font-weight: 700; letter-spacing: 3px; margin-bottom: 16px; }
.tool-page-header h1 { font-size: 32px; font-weight: 800; color: var(--text-bright); margin-bottom: 12px; }
.tool-page-header code { background: var(--surface); border: 1px solid var(--border); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; color: var(--teal); }
.tool-page-sub { color: var(--muted); font-size: 16px; line-height: 1.6; }

/* Calculator */
.calc-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 32px; margin-bottom: 32px; }
.calc-label { color: var(--muted-deep); font-size: 10px; font-weight: 700; letter-spacing: 2px; margin-bottom: 12px; }
.calc-model-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-bottom: 28px; }
.calc-model-btn { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 14px 12px; cursor: pointer; text-align: left; transition: border-color 0.2s, background 0.2s; display: flex; flex-direction: column; gap: 4px; }
.calc-model-btn:hover { border-color: var(--teal-border-hover); }
.calc-model-btn.active { border-color: var(--teal); background: rgba(45,212,191,0.06); }
.calc-model-name { color: var(--text-bright); font-size: 14px; font-weight: 700; }
.calc-model-price { color: var(--teal); font-size: 11px; font-weight: 600; }
.calc-model-tag { color: var(--muted); font-size: 10px; }
.calc-inputs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 28px; }
.calc-field { display: flex; flex-direction: column; gap: 6px; }
.calc-field-label { color: var(--muted); font-size: 12px; font-weight: 600; }
.calc-input { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--text-bright); font-size: 16px; font-family: inherit; transition: border-color 0.2s; }
.calc-input:focus { outline: none; border-color: var(--teal); }
.calc-field-hint { color: var(--muted-deep); font-size: 11px; }
.calc-result-box { background: var(--bg); border: 1px solid var(--teal-border); border-radius: 12px; padding: 24px; }
.calc-result-main { text-align: center; margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.calc-result-label { color: var(--muted); font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 8px; }
.calc-result-value { color: var(--teal); font-size: 42px; font-weight: 800; letter-spacing: -1px; }
.calc-breakdown { display: flex; flex-direction: column; gap: 10px; }
.calc-breakdown-item { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); }
.calc-breakdown-item span:last-child { color: var(--text); font-weight: 600; }
.calc-breakdown-divider { height: 1px; background: var(--border); margin: 4px 0; }
.calc-breakdown-month { font-size: 15px; color: var(--text); }
.calc-breakdown-month span:last-child { color: var(--teal); font-size: 18px; font-weight: 800; }
.calc-disclaimer { color: var(--muted-deep); font-size: 12px; text-align: center; margin-top: 16px; }
.calc-disclaimer a { color: var(--teal); }

/* Wizard */
.wizard-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 32px; margin-bottom: 32px; }
.wizard-progress { display: flex; align-items: center; margin-bottom: 36px; }
.wizard-step-dot { width: 28px; height: 28px; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); color: var(--muted); font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all 0.2s; }
.wizard-step-dot.active { background: var(--teal); border-color: var(--teal); color: #030712; }
.wizard-step-dot.done { background: rgba(45,212,191,0.15); border-color: var(--teal); color: var(--teal); }
.wizard-step-line { flex: 1; height: 1px; background: var(--border); }
.wizard-panel { display: none; }
.wizard-panel.active { display: block; }
.wizard-panel-title { color: var(--text-bright); font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.wizard-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.wizard-option { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px 16px; cursor: pointer; display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; transition: border-color 0.2s, color 0.2s; }
.wizard-option:hover { border-color: var(--teal-border-hover); color: var(--text); }
.wizard-option input[type="radio"] { accent-color: var(--teal); }
.wizard-checkboxes { display: flex; flex-direction: column; gap: 10px; }
.wizard-check { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px; cursor: pointer; display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; transition: border-color 0.2s; }
.wizard-check:hover { border-color: var(--teal-border-hover); }
.wizard-check input[type="checkbox"] { accent-color: var(--teal); }
.wizard-fields { display: flex; flex-direction: column; gap: 16px; }
.wizard-field { display: flex; flex-direction: column; gap: 6px; }
.wizard-field label { color: var(--muted); font-size: 12px; font-weight: 600; }
.wizard-input { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--text-bright); font-size: 15px; font-family: inherit; transition: border-color 0.2s; }
.wizard-input:focus { outline: none; border-color: var(--teal); }
.wizard-textarea { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--text-bright); font-size: 14px; font-family: inherit; resize: vertical; transition: border-color 0.2s; line-height: 1.6; }
.wizard-textarea:focus { outline: none; border-color: var(--teal); }
.wizard-result-actions { display: flex; gap: 12px; margin-bottom: 20px; }
.wizard-output { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 20px; color: var(--text); font-size: 13px; line-height: 1.7; white-space: pre-wrap; word-break: break-word; max-height: 400px; overflow-y: auto; }
.wizard-nav { display: flex; justify-content: flex-end; gap: 12px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }

/* Tool page related */
.tool-page-related { margin-top: 48px; }
.tool-page-related-link { display: flex; align-items: center; gap: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 20px 24px; text-decoration: none; transition: border-color 0.2s; color: var(--text); }
.tool-page-related-link:hover { border-color: var(--teal); }
.tool-page-related-icon { font-size: 24px; flex-shrink: 0; }
.tool-page-related-name { color: var(--text-bright); font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.tool-page-related-desc { color: var(--muted); font-size: 13px; }

@media (max-width: 768px) {
  .tool-page { padding: 32px 20px 60px; }
  .calc-model-grid { grid-template-columns: 1fr; }
  .calc-inputs-grid { grid-template-columns: 1fr; }
  .wizard-options { grid-template-columns: 1fr; }
  .calc-result-value { font-size: 32px; }
}

/* ===========================
   JSON Formatter
   =========================== */
.jfmt-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 24px; margin-bottom: 32px; }
.jfmt-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }
.jfmt-toolbar-left, .jfmt-toolbar-right { display: flex; align-items: center; gap: 8px; }
.jfmt-btn { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 7px 14px; color: var(--muted); font-size: 13px; font-family: inherit; cursor: pointer; transition: border-color 0.2s, color 0.2s; }
.jfmt-btn:hover { border-color: var(--teal-border-hover); color: var(--text); }
.jfmt-btn-primary { background: var(--teal); border-color: var(--teal); color: #030712; font-weight: 700; }
.jfmt-btn-primary:hover { background: #5eead4; border-color: #5eead4; color: #030712; }
.jfmt-status { font-size: 12px; font-weight: 700; letter-spacing: 1px; padding: 4px 10px; border-radius: 20px; }
.jfmt-status-ok  { background: rgba(45,212,191,0.1); color: var(--teal); border: 1px solid rgba(45,212,191,0.25); }
.jfmt-status-err { background: rgba(248,113,113,0.1); color: #f87171; border: 1px solid rgba(248,113,113,0.25); }
.jfmt-panels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.jfmt-panel-label { color: var(--muted-deep); font-size: 10px; letter-spacing: 2px; font-weight: 600; margin-bottom: 6px; }
.jfmt-textarea { width: 100%; min-height: 320px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px; color: var(--text); font-family: 'Fira Code', 'Consolas', monospace; font-size: 13px; line-height: 1.6; resize: vertical; transition: border-color 0.2s; box-sizing: border-box; }
.jfmt-textarea:focus { outline: none; border-color: var(--teal); }
.jfmt-output { min-height: 320px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px; font-family: 'Fira Code', 'Consolas', monospace; font-size: 13px; line-height: 1.6; overflow: auto; white-space: pre; margin: 0; }
.jfmt-key   { color: #7dd3fc; }
.jfmt-str   { color: #86efac; }
.jfmt-num   { color: #fb923c; }
.jfmt-bool  { color: #a78bfa; }
.jfmt-null  { color: #94a3b8; }
.jfmt-error { display: none; background: rgba(248,113,113,0.08); border: 1px solid rgba(248,113,113,0.2); border-radius: 8px; padding: 10px 14px; color: #f87171; font-size: 13px; margin-top: 12px; font-family: 'Fira Code', monospace; }
.jfmt-stats { color: var(--muted-deep); font-size: 11px; margin-top: 10px; }

/* ===========================
   Color Converter
   =========================== */
.color-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 32px; margin-bottom: 32px; }
.color-preview-row { display: flex; align-items: center; gap: 20px; margin-bottom: 32px; }
.color-picker-input { width: 56px; height: 56px; border: 2px solid var(--border); border-radius: 10px; padding: 4px; background: none; cursor: pointer; flex-shrink: 0; }
.color-swatch { width: 120px; height: 56px; border-radius: 10px; border: 1px solid var(--border); flex-shrink: 0; transition: background 0.15s; }
.color-swatch-name { color: var(--text-bright); font-size: 18px; font-weight: 700; font-family: 'Fira Code', monospace; margin-bottom: 4px; }
.color-swatch-sub { color: var(--muted); font-size: 13px; font-family: 'Fira Code', monospace; }
.color-fields { display: flex; flex-direction: column; gap: 20px; margin-bottom: 28px; }
.color-field-group {}
.color-field-label { color: var(--muted-deep); font-size: 10px; font-weight: 700; letter-spacing: 2px; margin-bottom: 8px; }
.color-field-row { display: flex; align-items: center; gap: 10px; }
.color-input { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--text-bright); font-size: 15px; font-family: 'Fira Code', monospace; transition: border-color 0.2s; }
.color-input:focus { outline: none; border-color: var(--teal); }
.color-input-hex { flex: 1; }
.color-input-sm { width: 72px; text-align: center; }
.color-rgb-inputs { display: flex; gap: 8px; flex: 1; }
.color-channel { display: flex; align-items: center; gap: 6px; }
.color-channel-label { color: var(--teal); font-size: 11px; font-weight: 700; letter-spacing: 1px; width: 14px; }
.color-copy-btn { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 8px 14px; color: var(--muted); font-size: 12px; font-family: inherit; cursor: pointer; transition: border-color 0.2s, color 0.2s; white-space: nowrap; flex-shrink: 0; }
.color-copy-btn:hover { border-color: var(--teal-border-hover); color: var(--text); }
.color-css-box { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.color-css-label { color: var(--muted-deep); font-size: 10px; font-weight: 700; letter-spacing: 2px; margin-bottom: 12px; }
.color-css-snippets { display: flex; flex-direction: column; gap: 8px; }
.color-css-snippet { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 10px 14px; }
.color-css-snippet code { color: var(--text); font-size: 13px; font-family: 'Fira Code', monospace; }
.color-css-snippet button { background: none; border: 1px solid var(--border); border-radius: 5px; padding: 4px 10px; color: var(--muted); font-size: 11px; cursor: pointer; white-space: nowrap; transition: border-color 0.2s; font-family: inherit; }
.color-css-snippet button:hover { border-color: var(--teal); color: var(--teal); }

@media (max-width: 768px) {
  .jfmt-panels { grid-template-columns: 1fr; }
  .jfmt-textarea, .jfmt-output { min-height: 200px; }
  .color-rgb-inputs { gap: 6px; }
  .color-input-sm { width: 60px; }
}

/* ===========================
   JWT Decoder
   =========================== */
.jwt-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 32px; margin-bottom: 32px; }
.jwt-input-label { color: var(--muted-deep); font-size: 10px; font-weight: 700; letter-spacing: 2px; margin-bottom: 8px; }
.jwt-textarea { width: 100%; min-height: 100px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px; color: var(--text); font-family: 'Fira Code', 'Consolas', monospace; font-size: 12px; line-height: 1.6; resize: vertical; transition: border-color 0.2s; box-sizing: border-box; word-break: break-all; }
.jwt-textarea:focus { outline: none; border-color: var(--teal); }
.jwt-parts { font-family: 'Fira Code', monospace; font-size: 11px; line-height: 1.7; margin-top: 10px; word-break: break-all; }
.jwt-part { padding: 2px 0; }
.jwt-part-red    { color: #f87171; }
.jwt-part-purple { color: #a78bfa; }
.jwt-part-teal   { color: var(--teal); }
.jwt-part-dot    { color: var(--muted-deep); }
.jwt-error { background: rgba(248,113,113,0.08); border: 1px solid rgba(248,113,113,0.2); border-radius: 8px; padding: 10px 14px; color: #f87171; font-size: 13px; margin-top: 16px; }
.jwt-status-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 20px 0 16px; }
.jwt-badge { font-size: 11px; font-weight: 700; letter-spacing: 1px; padding: 4px 10px; border-radius: 20px; }
.jwt-badge-green  { background: rgba(74,222,128,0.12); color: #4ade80; border: 1px solid rgba(74,222,128,0.25); }
.jwt-badge-red    { background: rgba(248,113,113,0.12); color: #f87171; border: 1px solid rgba(248,113,113,0.25); }
.jwt-badge-orange { background: rgba(251,146,60,0.12); color: #fb923c; border: 1px solid rgba(251,146,60,0.25); }
.jwt-badge-muted  { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.jwt-badge-label  { color: var(--muted); font-size: 12px; }
.jwt-sections { display: flex; flex-direction: column; gap: 12px; }
.jwt-section { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.jwt-section-header { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.jwt-section-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.jwt-dot-red    { background: #f87171; }
.jwt-dot-purple { background: #a78bfa; }
.jwt-dot-teal   { background: var(--teal); }
.jwt-section-title { color: var(--muted-deep); font-size: 10px; font-weight: 700; letter-spacing: 2px; flex: 1; }
.jwt-copy-btn { background: none; border: 1px solid var(--border); border-radius: 5px; padding: 3px 10px; color: var(--muted); font-size: 11px; cursor: pointer; font-family: inherit; transition: border-color 0.2s; }
.jwt-copy-btn:hover { border-color: var(--teal); color: var(--teal); }
.jwt-pre { margin: 0; padding: 16px; font-family: 'Fira Code', monospace; font-size: 12px; line-height: 1.7; overflow-x: auto; }
.jwt-sig-note { padding: 16px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.jwt-claims-inner { border-top: 1px solid var(--border); }
.jwt-claim-row { display: flex; gap: 12px; padding: 8px 16px; border-bottom: 1px solid var(--border); font-size: 13px; }
.jwt-claim-row:last-child { border-bottom: none; }
.jwt-claim-key { color: var(--teal); font-weight: 600; min-width: 100px; flex-shrink: 0; }
.jwt-claim-val { color: var(--muted); font-family: 'Fira Code', monospace; font-size: 12px; word-break: break-all; }
.jwt-claim-date { color: var(--muted-deep); font-size: 11px; }
.jwt-security-note { color: var(--muted-deep); font-size: 12px; margin-top: 20px; text-align: center; }

/* ===========================
   Prompt Library
   =========================== */
.plib-wrap { }
.plib-controls { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 28px; }
.plib-search { flex: 1; min-width: 200px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--text); font-size: 14px; font-family: inherit; transition: border-color 0.2s; }
.plib-search:focus { outline: none; border-color: var(--teal); }
.plib-search::placeholder { color: var(--muted-deep); }
.plib-filters { display: flex; gap: 8px; flex-wrap: wrap; }
.plib-cat { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 5px 14px; font-size: 12px; font-weight: 600; color: var(--muted); cursor: pointer; transition: all 0.2s; letter-spacing: 0.5px; white-space: nowrap; font-family: inherit; }
.plib-cat:hover { border-color: var(--teal); color: var(--teal); }
.plib-cat.active { background: var(--teal-dim); border-color: var(--teal); color: var(--teal); }
.plib-count { color: var(--muted-deep); font-size: 13px; margin-bottom: 20px; }
.plib-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.plib-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; display: flex; flex-direction: column; gap: 10px; transition: border-color 0.2s; }
.plib-card:hover { border-color: var(--teal-border-hover); }
.plib-card-cat { font-size: 10px; font-weight: 700; letter-spacing: 1.5px; color: var(--teal); text-transform: uppercase; }
.plib-card-title { font-size: 15px; font-weight: 700; color: var(--text-bright); line-height: 1.3; }
.plib-card-desc { font-size: 13px; color: var(--muted); line-height: 1.5; flex: 1; }
.plib-card-preview { font-size: 12px; color: var(--muted-deep); font-family: var(--font-mono); background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; line-height: 1.6; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
.plib-card-actions { display: flex; gap: 8px; margin-top: 4px; }
.plib-copy-btn { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 6px 14px; font-size: 12px; font-weight: 600; color: var(--muted); cursor: pointer; font-family: inherit; transition: all 0.2s; }
.plib-copy-btn:hover { border-color: var(--teal); color: var(--teal); }
.plib-expand-btn { background: var(--teal-dim); border: 1px solid var(--teal-border); border-radius: 6px; padding: 6px 14px; font-size: 12px; font-weight: 600; color: var(--teal); cursor: pointer; font-family: inherit; transition: all 0.2s; }
.plib-expand-btn:hover { background: rgba(45,212,191,0.15); }
.plib-empty { grid-column: 1/-1; text-align: center; padding: 60px 20px; color: var(--muted-deep); font-size: 15px; }
.plib-modal { position: fixed; inset: 0; background: rgba(3,7,18,0.85); backdrop-filter: blur(4px); z-index: 1000; display: none; align-items: center; justify-content: center; padding: 20px; }
.plib-modal.open { display: flex; }
.plib-modal-box { background: var(--surface); border: 1px solid var(--teal-border); border-radius: 16px; width: 100%; max-width: 640px; max-height: 85vh; display: flex; flex-direction: column; overflow: hidden; }
.plib-modal-header { padding: 20px 24px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.plib-modal-title { font-size: 17px; font-weight: 700; color: var(--text-bright); margin-top: 4px; }
.plib-modal-close { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; width: 32px; height: 32px; color: var(--muted); font-size: 18px; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all 0.2s; font-family: inherit; }
.plib-modal-close:hover { border-color: var(--teal); color: var(--teal); }
.plib-modal-body { white-space: pre-wrap; font-family: var(--font-mono); font-size: 13px; color: var(--text); line-height: 1.7; background: var(--bg); margin: 0; padding: 20px 24px; overflow-y: auto; flex: 1; }
.plib-modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; }
@media (max-width: 600px) {
  .plib-grid { grid-template-columns: 1fr; }
  .plib-controls { flex-direction: column; }
  .plib-search { width: 100%; }
}