/* FlintReady Shop — field-manual aesthetic, dark charcoal + orange */
:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #222222;
  --bg-tertiary: #2a2a2a;
  --bg-card: #252525;
  --fg-primary: #e8e4de;
  --fg-secondary: #a89f94;
  --fg-muted: #6b6560;
  --accent: #FF6B35;
  --accent-dim: #cc5529;
  --accent-glow: rgba(255, 107, 53, 0.12);
  --accent-hover: rgba(255, 107, 53, 0.08);
  --border: #333333;
  --border-light: #3a3a3a;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --max-w: 1100px;
  --radius: 3px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg-primary);
  color: var(--fg-primary);
  font-family: var(--font-serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* LAYOUT */
.section-container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
main { padding-top: 56px; }

/* NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(26,26,26,0.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 2rem;
  height: 56px; display: flex; justify-content: space-between;
  align-items: center; gap: 1rem;
}
.nav-brand { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); flex-shrink: 0; }
.nav-icon { color: var(--accent); font-size: 0.7rem; }
.nav-name { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.15em; color: var(--fg-primary); }
.nav-tag { font-size: 0.6rem; font-weight: 500; letter-spacing: 0.12em; color: var(--accent); border: 1px solid var(--accent-dim); padding: 0.1rem 0.35rem; border-radius: 2px; }
.nav-links { display: flex; gap: 0.25rem; align-items: center; flex: 1; justify-content: center; }
.nav-link { font-family: var(--font-mono); font-size: 0.65rem; font-weight: 500; letter-spacing: 0.1em; color: var(--fg-muted); padding: 0.35rem 0.65rem; border-radius: var(--radius); transition: color 0.15s ease, background 0.15s ease; }
.nav-link:hover, .nav-link.active { color: var(--fg-primary); background: var(--accent-hover); }
.nav-link.active { color: var(--accent); }
.nav-status { display: flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.6rem; color: var(--fg-muted); letter-spacing: 0.08em; flex-shrink: 0; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.35; } }
.nav-mobile-links { display: none; }

/* SECTION HEADERS */
.section-header { margin-bottom: 3rem; }
.section-number { display: block; font-family: var(--font-mono); font-size: 0.65rem; font-weight: 600; letter-spacing: 0.2em; color: var(--accent); margin-bottom: 0.4rem; }
.section-title { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700; letter-spacing: 0.2em; color: var(--fg-primary); margin-bottom: 0.75rem; }
.section-sub { font-size: 1rem; color: var(--fg-secondary); max-width: 560px; line-height: 1.7; }
.subsection-title { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.2em; color: var(--fg-muted); margin-bottom: 1.5rem; }

/* HERO */
.hero { padding: 6rem 0 5rem; border-bottom: 1px solid var(--border); }
.hero-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.hero-label { display: flex; align-items: center; gap: 1rem; margin-bottom: 2rem; }
.label-line { flex: 0 0 2rem; height: 1px; background: var(--accent); }
.label-text { font-family: var(--font-mono); font-size: 0.65rem; font-weight: 600; letter-spacing: 0.2em; color: var(--accent); }
.hero-title { font-family: var(--font-serif); font-size: clamp(2.2rem,5vw,3.8rem); font-weight: 700; line-height: 1.15; color: var(--fg-primary); margin-bottom: 1.5rem; max-width: 700px; }
.hero-lede { font-size: 1.05rem; line-height: 1.8; color: var(--fg-secondary); max-width: 580px; margin-bottom: 2.5rem; }
.hero-cta-row { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.hero-attribution { font-family: var(--font-mono); font-size: 0.65rem; color: var(--fg-muted); letter-spacing: 0.06em; }
.hero-attribution-link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* PAGE HERO (inner pages) */
.page-hero { padding: 4rem 0 3.5rem; border-bottom: 1px solid var(--border); }
.page-hero-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.page-title { font-family: var(--font-serif); font-size: clamp(1.8rem,4vw,3rem); font-weight: 700; line-height: 1.2; color: var(--fg-primary); margin-bottom: 1rem; }
.page-lede { font-size: 1rem; color: var(--fg-secondary); max-width: 540px; line-height: 1.75; }

/* BREADCRUMB */
.breadcrumb { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.08em; color: var(--fg-muted); margin-bottom: 1.5rem; display: flex; gap: 0.4rem; align-items: center; }
.breadcrumb-link { color: var(--fg-muted); }
.breadcrumb-link:hover { color: var(--accent); }
.breadcrumb-sep { opacity: 0.4; }
.breadcrumb-current { color: var(--fg-secondary); }

/* BUTTONS */
.btn-primary { display: inline-flex; align-items: center; background: var(--accent); color: #fff; font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; padding: 0.75rem 1.5rem; border-radius: var(--radius); transition: background 0.15s ease, transform 0.1s ease; }
.btn-primary:hover { background: var(--accent-dim); transform: translateY(-1px); }
.btn-ghost { display: inline-flex; align-items: center; background: transparent; color: var(--fg-secondary); font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; padding: 0.75rem 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); transition: border-color 0.15s ease, color 0.15s ease; }
.btn-ghost:hover { border-color: var(--accent-dim); color: var(--fg-primary); }
.btn-buy { display: inline-flex; align-items: center; background: var(--accent); color: #fff; font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; padding: 0.85rem 1.75rem; border-radius: var(--radius); transition: background 0.15s ease, transform 0.1s ease; }
.btn-buy:hover { background: var(--accent-dim); transform: translateY(-1px); }
.btn-buy--large { padding: 1rem 2rem; font-size: 0.9rem; }
.btn-primary--sidebar, .btn-ghost--sidebar { display: block; text-align: center; margin-top: 1rem; }

/* CATEGORIES GRID */
.categories-section { padding: 5rem 0; border-bottom: 1px solid var(--border); }
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.category-card { display: flex; align-items: flex-start; gap: 1rem; padding: 1.75rem; background: var(--bg-card); transition: background 0.15s ease; position: relative; }
.category-card:hover { background: var(--bg-tertiary); }
.cat-icon { font-size: 1.5rem; flex-shrink: 0; line-height: 1; margin-top: 0.1rem; }
.cat-content { flex: 1; }
.cat-name { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; color: var(--fg-primary); margin-bottom: 0.4rem; text-transform: uppercase; }
.cat-desc { font-size: 0.88rem; color: var(--fg-secondary); line-height: 1.65; margin-bottom: 0.5rem; }
.cat-count { font-family: var(--font-mono); font-size: 0.6rem; color: var(--accent); letter-spacing: 0.1em; }
.cat-arrow { font-size: 1rem; color: var(--fg-muted); flex-shrink: 0; transition: color 0.15s ease, transform 0.15s ease; margin-top: 0.1rem; }
.category-card:hover .cat-arrow { color: var(--accent); transform: translateX(3px); }

/* PRODUCTS GRID */
.featured-section { padding: 5rem 0; border-bottom: 1px solid var(--border); }
.catalog-section { padding: 4rem 0; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 1.25rem; }
.products-grid--large { grid-template-columns: repeat(auto-fill, minmax(300px,1fr)); }
.product-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; transition: border-color 0.2s ease, transform 0.15s ease; display: block; }
.product-card:hover { border-color: var(--accent-dim); transform: translateY(-2px); }
.product-card--catalog { display: flex; flex-direction: column; }
.product-card-link { display: block; flex: 1; }
.product-card-img { aspect-ratio: 4/3; overflow: hidden; background: var(--bg-secondary); display: flex; align-items: center; justify-content: center; }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; }
.product-placeholder-icon { font-size: 2.5rem; }
.product-card-body { padding: 1.25rem; }
.product-cat-tag { font-family: var(--font-mono); font-size: 0.58rem; font-weight: 600; letter-spacing: 0.18em; color: var(--accent); display: block; margin-bottom: 0.5rem; }
.product-name { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 600; color: var(--fg-primary); margin-bottom: 0.5rem; line-height: 1.3; }
.product-desc { font-size: 0.85rem; color: var(--fg-secondary); line-height: 1.65; margin-bottom: 0.75rem; }
.product-meta { display: flex; gap: 0.75rem; align-items: center; }
.product-price { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; color: var(--accent); }
.product-rating { font-family: var(--font-mono); font-size: 0.7rem; color: var(--fg-muted); }
.rating-count { font-size: 0.65rem; color: var(--fg-muted); }
.product-card-footer { padding: 0 1.25rem 1.25rem; }

/* CATALOG HEADER */
.catalog-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2rem; flex-wrap: wrap; gap: 1rem; }
.catalog-count { font-family: var(--font-mono); font-size: 0.65rem; color: var(--fg-muted); letter-spacing: 0.1em; }
.disclosure-inline { font-family: var(--font-mono); font-size: 0.6rem; color: var(--fg-muted); max-width: 500px; line-height: 1.5; }

/* OTHER CATEGORIES */
.other-categories { padding: 4rem 0; border-top: 1px solid var(--border); }
.other-cats-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.other-cat-chip { display: flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.65rem; font-weight: 600; letter-spacing: 0.08em; color: var(--fg-secondary); padding: 0.45rem 0.85rem; border-radius: var(--radius); border: 1px solid var(--border); transition: border-color 0.15s ease, color 0.15s ease; }
.other-cat-chip:hover { border-color: var(--accent-dim); color: var(--fg-primary); }

/* PRODUCT DETAIL */
.product-hero { padding: 4rem 0; border-bottom: 1px solid var(--border); }
.product-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; margin-top: 2rem; }
.product-detail-img { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; aspect-ratio: 1; display: flex; align-items: center; justify-content: center; }
.product-detail-img img { width: 100%; height: 100%; object-fit: contain; padding: 1rem; }
.product-placeholder-icon-lg { font-size: 5rem; }
.product-cat-badge { display: inline-block; font-family: var(--font-mono); font-size: 0.6rem; font-weight: 600; letter-spacing: 0.18em; color: var(--accent); border: 1px solid var(--accent-dim); padding: 0.2rem 0.5rem; border-radius: 2px; margin-bottom: 1rem; text-transform: uppercase; transition: background 0.15s ease; }
.product-cat-badge:hover { background: var(--accent-glow); }
.product-detail-title { font-family: var(--font-serif); font-size: clamp(1.5rem,3vw,2.2rem); font-weight: 700; line-height: 1.2; color: var(--fg-primary); margin-bottom: 1rem; }
.product-rating-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.25rem; }
.product-rating-stars { display: flex; gap: 2px; }
.star { color: var(--fg-muted); font-size: 1rem; }
.star--full { color: var(--accent); }
.product-rating-num { font-family: var(--font-mono); font-size: 0.8rem; color: var(--fg-secondary); }
.product-review-count { font-family: var(--font-mono); font-size: 0.65rem; color: var(--fg-muted); }
.product-price-display { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; color: var(--accent); margin-bottom: 0.3rem; }
.product-price-note { font-family: var(--font-mono); font-size: 0.6rem; color: var(--fg-muted); margin-bottom: 1.5rem; }
.product-buy-box { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 4px; padding: 1.5rem; margin-bottom: 1.5rem; }
.affiliate-note { font-family: var(--font-mono); font-size: 0.6rem; color: var(--fg-muted); margin-top: 0.75rem; line-height: 1.5; }
.product-detail-desc { font-size: 0.95rem; color: var(--fg-secondary); line-height: 1.8; }

/* WHY RECOMMEND */
.why-recommend { padding: 4rem 0; border-top: 1px solid var(--border); }
.recommend-box { background: var(--bg-secondary); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 4px; padding: 2rem; max-width: 800px; }
.recommend-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.recommend-icon { color: var(--accent); font-size: 0.6rem; }
.recommend-title { font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.2em; color: var(--accent); }
.recommend-text { font-size: 0.95rem; color: var(--fg-secondary); line-height: 1.8; }

/* RELATED PRODUCTS */
.related-section { padding: 4rem 0; border-top: 1px solid var(--border); }

/* WHY SECTION */
.why-section { padding: 5rem 0; border-top: 1px solid var(--border); }
.why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 2.5rem; }
.why-marker { font-family: var(--font-mono); font-size: 0.6rem; font-weight: 700; color: var(--accent); margin-bottom: 0.65rem; letter-spacing: 0.05em; }
.why-heading { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 600; color: var(--fg-primary); margin-bottom: 0.5rem; }
.why-text { font-size: 0.88rem; color: var(--fg-secondary); line-height: 1.7; }
.inline-link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* EMPTY STATE */
.empty-state { text-align: center; padding: 5rem 2rem; }
.empty-icon { font-size: 3rem; display: block; margin-bottom: 1.25rem; }
.empty-text { font-size: 1rem; color: var(--fg-secondary); margin-bottom: 1.5rem; }

/* ABOUT */
.about-story { padding: 5rem 0; border-bottom: 1px solid var(--border); }
.about-grid { display: grid; grid-template-columns: 1fr 360px; gap: 5rem; }
.about-block { margin-bottom: 3.5rem; }
.about-block:last-child { margin-bottom: 0; }
.about-marker { font-family: var(--font-mono); font-size: 0.6rem; font-weight: 700; letter-spacing: 0.2em; color: var(--accent); display: block; margin-bottom: 0.5rem; }
.about-heading { font-family: var(--font-serif); font-size: 1.3rem; font-weight: 700; color: var(--fg-primary); margin-bottom: 0.75rem; }
.about-body { font-size: 0.95rem; color: var(--fg-secondary); line-height: 1.8; margin-bottom: 0.75rem; }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 4px; padding: 1.75rem; margin-bottom: 1.25rem; }
.sidebar-label { font-family: var(--font-mono); font-size: 0.6rem; font-weight: 700; letter-spacing: 0.2em; color: var(--accent); display: block; margin-bottom: 0.5rem; }
.sidebar-heading { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 600; color: var(--fg-primary); margin-bottom: 0.5rem; }
.sidebar-text { font-size: 0.88rem; color: var(--fg-secondary); line-height: 1.65; }
.sidebar-disclosure { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 4px; padding: 1.25rem; }
.sidebar-disclosure-text { font-size: 0.8rem; color: var(--fg-muted); line-height: 1.6; margin-top: 0.4rem; }
.about-cta { padding: 5rem 0; }
.about-cta-inner { max-width: 600px; }
.about-cta-title { font-family: var(--font-serif); font-size: clamp(1.4rem,3vw,2rem); font-weight: 700; color: var(--fg-primary); margin-bottom: 0.75rem; }
.about-cta-text { font-size: 0.95rem; color: var(--fg-secondary); line-height: 1.75; margin-bottom: 1.75rem; }
.about-cta-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

/* DISCLOSURE BANNER */
.disclosure-banner { padding: 2rem 0; background: var(--bg-secondary); border-top: 1px solid var(--border); }
.disclosure-text { font-family: var(--font-mono); font-size: 0.65rem; color: var(--fg-muted); line-height: 1.6; max-width: 800px; }

/* ERROR */
.error-block { padding: 4rem 0; }
.error-code { font-family: var(--font-mono); font-size: 3rem; font-weight: 700; color: var(--accent); display: block; margin-bottom: 1rem; }

/* FOOTER */
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border); padding: 4rem 0 2rem; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.footer-top { display: grid; grid-template-columns: auto 1fr; gap: 4rem; margin-bottom: 3rem; }
.footer-brand { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.15em; color: var(--fg-secondary); display: block; margin-bottom: 0.5rem; }
.footer-tagline { font-size: 0.85rem; color: var(--fg-muted); }
.footer-nav { display: flex; gap: 4rem; }
.footer-nav-col { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-nav-heading { font-family: var(--font-mono); font-size: 0.6rem; font-weight: 700; letter-spacing: 0.15em; color: var(--fg-muted); margin-bottom: 0.25rem; }
.footer-nav-link { font-size: 0.85rem; color: var(--fg-secondary); transition: color 0.15s ease; }
.footer-nav-link:hover { color: var(--fg-primary); }
.footer-nav-link--highlight { color: var(--accent); font-weight: 600; }
.footer-nav-link--highlight:hover { color: var(--accent-dim); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 1.5rem; }
.footer-disclosure { font-family: var(--font-mono); font-size: 0.6rem; color: var(--fg-muted); line-height: 1.6; margin-bottom: 1rem; max-width: 700px; }
.footer-meta { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.62rem; color: var(--fg-muted); }
.footer-copyright { color: var(--fg-muted); }
.footer-sep { opacity: 0.4; }
.footer-resource-link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* RECOMMENDED READING */
.recommended-reading { background: var(--bg-secondary); padding: 3rem 0; border-top: 1px solid var(--border); }
.reading-lede { font-size: 0.9rem; color: var(--fg-secondary); margin-bottom: 1.25rem; }
.reading-lede a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.reading-lede a:hover { color: var(--accent-dim); }
.reading-links { display: flex; flex-direction: column; gap: 0.5rem; }
.reading-link {
  display: flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.04em;
  color: var(--fg-secondary);
  padding: 0.65rem 0.875rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-tertiary);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.reading-link:hover { color: var(--fg-primary); border-color: var(--accent-dim); background: var(--accent-hover); }
.reading-arrow { color: var(--accent); font-size: 0.85rem; flex-shrink: 0; }

/* MOBILE */
@media (max-width: 900px) {
  .product-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer-top { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-nav { flex-wrap: wrap; gap: 2rem; }
  .nav-links { display: none; }
  .nav-mobile-links { display: flex; overflow-x: auto; gap: 0; border-top: 1px solid var(--border); background: var(--bg-secondary); padding: 0 1rem; }
  .nav-mobile-link { font-family: var(--font-mono); font-size: 0.65rem; font-weight: 500; letter-spacing: 0.08em; color: var(--fg-muted); padding: 0.6rem 0.75rem; white-space: nowrap; flex-shrink: 0; }
  main { padding-top: 88px; }
}

@media (max-width: 640px) {
  .hero { padding: 4rem 0 3.5rem; }
  .hero-title { font-size: 1.9rem; }
  .categories-grid { grid-template-columns: 1fr; }
  .products-grid, .products-grid--large { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .hero-cta-row, .about-cta-buttons { flex-direction: column; }
  .catalog-header { flex-direction: column; align-items: flex-start; }
  .footer-nav { flex-direction: column; gap: 1.5rem; }
  .section-container { padding: 0 1.25rem; }
}