/* ============================================================
   HabitEdge — Guides design layer
   Editorial reading layer on top of he.css. Used by:
   blog.html (guides index) and guides/*.html (articles).
   Palette inherits from he.css (#0C0C0A / #C4A55A / Plus Jakarta).
   ============================================================ */

/* ===== Shared nav chrome (index + articles) ===== */
.nav-link {
  position: relative; color: var(--color-text-muted);
  text-decoration: none; font-size: 0.8125rem; letter-spacing: 0.01em;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: ''; position: absolute; bottom: -3px; left: 0;
  width: 0; height: 1px; background: var(--color-accent-primary);
  transition: width 0.35s var(--ease-out);
}
.nav-link:hover { color: var(--color-text-primary); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--color-text-primary); }
.nav-link.active::after { width: 100%; }
.nav-desktop { display: none; }
@media (min-width: 768px) { .nav-desktop { display: inline-block; } }

.nav-cta {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.45rem 0.9rem; border-radius: var(--radius-pill);
  background: var(--color-accent-primary); color: #0C0C0A;
  font-weight: 700; font-size: 0.8125rem; text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.nav-cta:hover { background: var(--color-accent-hover); color: #0C0C0A; transform: translateY(-1px); }

/* ===== Reading progress bar ===== */
.read-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-hover));
  z-index: 100; transition: width 0.1s linear;
}

/* ===== Guides index hero ===== */
.guides-hero {
  position: relative; overflow: hidden;
  max-width: var(--container-max-width); margin: 0 auto;
  padding: clamp(4.5rem, 9vw, 8rem) var(--space-xl) clamp(2.5rem, 5vw, 4rem);
}
.guides-hero-blob {
  position: absolute; top: -18%; left: -10%;
  width: 620px; height: 620px; border-radius: 50%;
  filter: blur(120px); pointer-events: none;
  background: radial-gradient(circle, rgba(196,165,90,0.20) 0%, transparent 62%);
}
.eyebrow-row { display: flex; align-items: center; gap: 1.5rem; margin-bottom: 1.25rem; position: relative; }
.eyebrow-rule {
  flex: 1; height: 1px; background: var(--color-warm-200);
  transform: scaleX(0); transform-origin: left center;
  transition: transform 1s var(--ease-out);
}
.eyebrow-rule.visible { transform: scaleX(1); }
.guides-hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.25rem); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1.06; margin-bottom: 1.1rem;
  max-width: 16ch; text-wrap: balance;
}
.guides-hero p { font-size: 1.0625rem; color: var(--color-text-secondary); max-width: 58ch; line-height: 1.7; }

/* ===== Category filter ===== */
.cat-bar {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  max-width: var(--container-max-width); margin: 0 auto;
  padding: 0 var(--space-xl) 2rem;
}
.cat-chip {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
  color: var(--color-text-muted); background: transparent;
  border: 1px solid var(--color-warm-200); border-radius: var(--radius-pill);
  padding: 0.4rem 0.85rem; cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}
.cat-chip:hover { color: var(--color-text-primary); border-color: var(--color-warm-300); }
.cat-chip.active { color: #0C0C0A; background: var(--color-accent-primary); border-color: var(--color-accent-primary); }

/* ===== Guides grid ===== */
.guides-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.25rem; list-style: none; padding: 0;
  max-width: var(--container-max-width); margin: 0 auto;
}
.guide-card {
  position: relative; display: flex; flex-direction: column;
  background: rgba(255,255,255,0.022);
  border: 1px solid var(--color-warm-200);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  border-radius: var(--radius-md); overflow: hidden;
  text-decoration: none; color: inherit; padding: 1.5rem;
  transition: border-color 0.35s, transform 0.4s var(--ease-out), background 0.35s;
  --mx: 50%; --my: 50%;
}
.guide-card::before {
  content: ''; position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(ellipse 60% 60% at var(--mx) var(--my), rgba(196,165,90,0.08), transparent 70%);
  transition: opacity 0.4s;
}
.guide-card:hover { border-color: var(--color-warm-300); background: rgba(255,255,255,0.032); transform: translateY(-3px); }
.guide-card:hover::before { opacity: 1; }
.guide-ico {
  width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(196,165,90,0.10); border: 1px solid rgba(196,165,90,0.22);
  color: var(--color-accent-primary); margin-bottom: 1.1rem;
}
.guide-ico svg { width: 20px; height: 20px; }
.guide-card-tag {
  font-size: 0.625rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--color-accent-primary); margin-bottom: 0.55rem;
}
.guide-card-title {
  font-size: 1.0625rem; font-weight: 700; letter-spacing: -0.01em;
  line-height: 1.32; color: var(--color-text-primary); margin-bottom: 0.55rem;
}
.guide-card-excerpt {
  font-size: 0.875rem; line-height: 1.6; color: var(--color-text-muted);
  flex: 1; margin-bottom: 1.1rem;
}
.guide-card-link {
  display: inline-flex; align-items: center; gap: 0.35rem; margin-top: auto;
  font-size: 0.8125rem; font-weight: 600; color: var(--color-accent-primary);
  transition: gap 0.2s var(--ease-out);
}
.guide-card:hover .guide-card-link { gap: 0.6rem; }

/* ===== Article layout ===== */
.article-hero {
  position: relative; overflow: hidden;
  max-width: 1100px; margin: 0 auto;
  padding: clamp(3.5rem, 7vw, 6rem) var(--space-xl) 1.5rem;
}
.back-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.8125rem; font-weight: 600; color: var(--color-text-muted);
  margin-bottom: 1.75rem; transition: color var(--transition-fast), gap 0.2s var(--ease-out);
}
.back-link:hover { color: var(--color-accent-primary); gap: 0.6rem; }
.article-tag {
  font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--color-accent-primary);
}
.article-title {
  font-size: clamp(2rem, 4.2vw, 3rem); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1.08; margin: 0.85rem 0 1.1rem;
  max-width: 20ch; text-wrap: balance;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem;
  font-size: 0.8125rem; color: var(--color-text-muted);
}
.article-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--color-warm-400); }

.article-shell {
  max-width: 1100px; margin: 0 auto;
  padding: 1.5rem var(--space-xl) 4rem;
  display: grid; grid-template-columns: 1fr; gap: 2.5rem;
}
@media (min-width: 1000px) {
  .article-shell { grid-template-columns: minmax(0, 1fr) 230px; gap: 4rem; }
  .article-shell .toc-col { order: 2; }
  .article-shell .prose-col { order: 1; }
}

/* ===== Table of contents ===== */
.toc {
  position: sticky; top: calc(var(--header-height) + 1.5rem);
  font-size: 0.8125rem; max-height: calc(100dvh - var(--header-height) - 3rem);
  overflow-y: auto;
}
.toc-label {
  font-size: 0.625rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--color-text-muted); margin-bottom: 0.9rem;
}
.toc ul { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--color-warm-200); }
.toc li a {
  display: block; padding: 0.3rem 0 0.3rem 0.9rem; margin-left: -1px;
  color: var(--color-text-muted); border-left: 1px solid transparent;
  line-height: 1.4; transition: color var(--transition-fast), border-color var(--transition-fast);
}
.toc li.sub a { padding-left: 1.7rem; font-size: 0.78rem; }
.toc li a:hover { color: var(--color-text-secondary); }
.toc li a.active { color: var(--color-accent-primary); border-left-color: var(--color-accent-primary); }
@media (max-width: 999px) { .toc-col { display: none; } }

/* ===== Prose ===== */
.guide-prose { max-width: 68ch; }
.guide-prose > *:first-child { margin-top: 0; }
.guide-prose p { color: var(--color-text-secondary); line-height: 1.78; margin: 0 0 1.25rem; font-size: 1.0625rem; }
.guide-prose h2 {
  font-size: 1.6rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.2;
  color: var(--color-text-primary); margin: 3rem 0 1rem; scroll-margin-top: calc(var(--header-height) + 1.5rem);
}
.guide-prose h2::after {
  content: ''; display: block; width: 2.25rem; height: 2px; margin-top: 0.65rem;
  background: var(--color-accent-primary); border-radius: 2px;
}
.guide-prose h3 {
  font-size: 1.2rem; font-weight: 700; letter-spacing: -0.01em;
  color: var(--color-text-primary); margin: 2rem 0 0.75rem;
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}
.guide-prose h4 {
  font-size: 1rem; font-weight: 700; color: var(--color-text-primary);
  margin: 1.5rem 0 0.6rem; scroll-margin-top: calc(var(--header-height) + 1.5rem);
}
.guide-prose a { color: var(--color-accent-primary); text-decoration: none; border-bottom: 1px solid rgba(196,165,90,0.3); transition: border-color var(--transition-fast); }
.guide-prose a:hover { border-bottom-color: var(--color-accent-primary); }
.guide-prose strong { color: var(--color-text-primary); font-weight: 700; }
.guide-prose em { color: var(--color-text-secondary); }
.guide-prose ul, .guide-prose ol { margin: 0 0 1.25rem; padding-left: 1.4rem; color: var(--color-text-secondary); }
.guide-prose li { margin-bottom: 0.5rem; line-height: 1.7; font-size: 1.0625rem; }
.guide-prose li::marker { color: var(--color-accent-primary); }
.guide-prose ul ul, .guide-prose ol ol, .guide-prose ul ol, .guide-prose ol ul { margin: 0.5rem 0 0.5rem; }
.guide-prose hr { border: none; height: 1px; background: var(--color-warm-200); margin: 2.5rem 0; }

/* inline code */
.guide-prose code {
  font-family: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;
  font-size: 0.86em; padding: 0.15em 0.4em; border-radius: 5px;
  background: rgba(196,165,90,0.10); color: var(--color-accent-hover);
  border: 1px solid rgba(196,165,90,0.16);
}

/* blockquote / callout */
.guide-prose blockquote {
  margin: 1.5rem 0; padding: 1.1rem 1.3rem;
  background: rgba(196,165,90,0.06); border: 1px solid rgba(196,165,90,0.2);
  border-radius: var(--radius-md); position: relative;
}
.guide-prose blockquote p { margin: 0 0 0.5rem; color: var(--color-text-secondary); }
.guide-prose blockquote p:last-child { margin-bottom: 0; }

/* code blocks */
.code-block { margin: 1.5rem 0; border: 1px solid var(--color-warm-200); border-radius: var(--radius-md); overflow: hidden; background: #0A0A08; }
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.5rem 0.9rem; background: rgba(255,255,255,0.022);
  border-bottom: 1px solid var(--color-warm-200);
}
.code-lang { font-size: 0.625rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-muted); }
.code-copy {
  display: inline-flex; align-items: center; gap: 0.3rem; cursor: pointer;
  background: transparent; border: none; color: var(--color-text-muted);
  font-size: 0.7rem; font-weight: 600; font-family: inherit; transition: color var(--transition-fast);
}
.code-copy:hover { color: var(--color-accent-primary); }
.code-copy.copied { color: var(--color-success); }
.code-block pre { margin: 0; padding: 1.1rem 1.2rem; overflow-x: auto; }
.code-block code {
  font-family: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;
  font-size: 0.84rem; line-height: 1.65; color: var(--color-warm-700);
  background: none; border: none; padding: 0; white-space: pre;
}

/* tables */
.guide-prose .table-wrap { overflow-x: auto; margin: 1.5rem 0; }
.guide-prose table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.guide-prose th, .guide-prose td { text-align: left; padding: 0.65rem 0.9rem; border-bottom: 1px solid var(--color-warm-200); }
.guide-prose th { color: var(--color-text-primary); font-weight: 700; background: rgba(255,255,255,0.02); }
.guide-prose td { color: var(--color-text-secondary); }

/* ===== Prev / next ===== */
.guide-nav {
  max-width: 1100px; margin: 0 auto; padding: 0 var(--space-xl) 4rem;
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
@media (max-width: 640px) { .guide-nav { grid-template-columns: 1fr; } }
.guide-nav a {
  display: flex; flex-direction: column; gap: 0.35rem; padding: 1.1rem 1.3rem;
  border: 1px solid var(--color-warm-200); border-radius: var(--radius-md);
  text-decoration: none; color: inherit; transition: border-color var(--transition-fast), background var(--transition-fast);
}
.guide-nav a:hover { border-color: var(--color-warm-300); background: rgba(255,255,255,0.02); }
.guide-nav .gn-label { font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text-muted); }
.guide-nav .gn-next { text-align: right; align-items: flex-end; }
.guide-nav .gn-title { font-size: 0.95rem; font-weight: 700; color: var(--color-text-primary); line-height: 1.35; }

/* ===== CTA strip ===== */
.guide-cta {
  text-align: center; max-width: var(--container-max-width); margin: 0 auto;
  padding: 3rem var(--space-xl);
  border-top: 1px solid var(--color-warm-200); border-bottom: 1px solid var(--color-warm-200);
}
.guide-cta h3 { font-size: 1.3rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.guide-cta p { color: var(--color-text-muted); font-size: 0.95rem; margin-bottom: 1.5rem; }

/* ===== Reveal ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.reveal.visible { opacity: 1; transform: none; }
.rs1 { transition-delay: 0ms; } .rs2 { transition-delay: 70ms; } .rs3 { transition-delay: 140ms; }
.rs4 { transition-delay: 210ms; } .rs5 { transition-delay: 280ms; } .rs6 { transition-delay: 350ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .eyebrow-rule { opacity: 1 !important; transform: none !important; transition: none; }
  .guide-card, .read-progress { transition: none; }
}
@media (max-width: 767px) {
  .guides-hero, .cat-bar, .guides-grid, .article-hero, .article-shell, .guide-nav, .guide-cta { padding-left: var(--space-md); padding-right: var(--space-md); }
  .guides-grid { grid-template-columns: 1fr; }
}