/* ============================================================
   GridReady – main.css
   Design system inspired by gridreadyhq.com
   ============================================================ */

/* ---- 1. Variables ---- */
:root {
  /* Color: ink scale */
  --ink-50:  #f7f7f5;
  --ink-100: #ececea;
  --ink-200: #d8d7d3;
  --ink-300: #b3b1aa;
  --ink-400: #87857d;
  --ink-500: #5a5953;
  --ink-600: #3d3c38;
  --ink-700: #292825;
  --ink-800: #1a1917;
  --ink-900: #0c0b0a;

  /* Color: volt (yellow) */
  --volt-50:  #fefce8;
  --volt-200: #fef08a;
  --volt-300: #fde047;
  --volt-400: #facc15;
  --volt-500: #eab308;

  /* Color: signal (orange) */
  --signal-50:  #fff7ed;
  --signal-500: #ea580c;
  --signal-600: #c2410c;

  --surface: var(--ink-50);

  /* Typography */
  --font-display: 'Libre Bodoni', ui-serif, Georgia, 'Times New Roman', serif;
  --font-sans:    'Public Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Layout */
  --max-w:       72rem;   /* 1152px – max-w-6xl */
  --max-w-prose: 48rem;   /* 768px  – max-w-3xl */
  --px:          1rem;
  --header-h:    4rem;

  /* Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-sm: 0 1px 3px 0 rgba(0,0,0,.10), 0 1px 2px -1px rgba(0,0,0,.10);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.10), 0 2px 4px -2px rgba(0,0,0,.10);

  /* Transitions */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur:  200ms;
}

@media (min-width: 640px)  { :root { --px: 1.5rem; } }
@media (min-width: 1024px) { :root { --px: 2rem;   } }

/* ---- 2. Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-900);
  background-color: var(--surface);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--signal-600); }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul, ol { list-style: none; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; }

/* ---- 3. Accessibility ---- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.sr-only:focus {
  position: fixed;
  top: 0.5rem; left: 0.5rem;
  width: auto; height: auto;
  clip: auto;
  white-space: normal;
  background: var(--ink-900);
  color: var(--ink-50);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  z-index: 200;
}
:focus-visible { outline: 2px solid var(--signal-500); outline-offset: 2px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--signal-500); outline-offset: 2px; }

/* ---- 4. Container ---- */
.container,
.site-header-inner,
.site-footer-inner {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--px);
  padding-right: var(--px);
}

/* ---- 5. Eyebrow ---- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal-600);
}

/* ---- 6. Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background-color: rgba(247,247,245,.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--ink-200);
}
.site-header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo:hover { color: inherit; }
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.25rem;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--ink-900);
  line-height: 1;
}
.site-nav {
  display: none;
  align-items: center;
  gap: 1.75rem;
}
.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-600);
  text-transform: capitalize;
  transition: color var(--dur) var(--ease);
}
.site-nav a:hover,
.site-nav a.is-active { color: var(--ink-900); }
@media (min-width: 768px) { .site-nav { display: flex; } }

/* Hamburger */
.hamburger-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem; height: 2.25rem;
  color: var(--ink-700);
  border-radius: var(--radius-md);
  transition: background var(--dur) var(--ease);
  flex-shrink: 0;
}
.hamburger-btn:hover { background: var(--ink-100); }
.hamburger-btn .icon-close { display: none; }
.hamburger-btn[aria-expanded="true"] .icon-menu  { display: none; }
.hamburger-btn[aria-expanded="true"] .icon-close { display: block; }
@media (min-width: 768px) { .hamburger-btn { display: none; } }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  z-index: 49;
  background: var(--ink-50);
  border-bottom: 1px solid var(--ink-200);
  padding: 1rem var(--px) 1.5rem;
  box-shadow: var(--shadow-md);
}
.mobile-menu.is-open { display: block; }
.mobile-menu nav { display: flex; flex-direction: column; gap: 0.25rem; }
.mobile-menu nav a {
  display: block;
  padding: 0.625rem 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-700);
  text-transform: capitalize;
  border-radius: var(--radius-md);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.mobile-menu nav a:hover { background: var(--ink-100); color: var(--ink-900); }

/* ---- 7. Hero ---- */
.hero {
  position: relative;
  border-bottom: 1px solid var(--ink-200);
  background: var(--ink-50);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.55;
  -webkit-mask-image: radial-gradient(ellipse 85% 90% at 80% 40%, black 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 85% 90% at 80% 40%, black 0%, transparent 75%);
  pointer-events: none;
}
.hero-bg svg { width: 100%; height: 100%; }
.hero .container { position: relative; z-index: 1; padding-top: 3rem; padding-bottom: 3.5rem; }
@media (min-width: 768px) { .hero .container { padding-top: 4rem; padding-bottom: 5rem; } }
.hero-content { max-width: 40rem; }
.hero .eyebrow { margin-bottom: 0.75rem; }
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.025em;
  line-height: 0.95;
  margin-top: 0.75rem;
}
.hero-desc {
  margin-top: 1rem;
  font-size: 1.125rem;
  color: var(--ink-600);
  max-width: 36rem;
  line-height: 1.625;
}

/* Animated SVG elements */
@keyframes ringPulse {
  0%   { transform: scale(1);    opacity: 1; }
  70%  { transform: scale(1.06); opacity: 0.5; }
  100% { transform: scale(1);    opacity: 1; }
}
@keyframes corePulse {
  0%, 100% { r: 3.5px; opacity: 1; }
  50%       { r: 5px;   opacity: 0.7; }
}
.ring { animation: ringPulse 4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.ring-2 { animation-delay: -0.8s; }
.ring-3 { animation-delay: -1.6s; }
.ring-4 { animation-delay: -2.4s; }
.ring-5 { animation-delay: -3.2s; }
.core-dot { animation: corePulse 2.5s ease-in-out infinite; }

/* ---- 8. Page Banner (category / static) ---- */
.page-banner {
  border-bottom: 1px solid var(--ink-200);
  background: var(--ink-50);
  padding: 3rem 0;
}
@media (min-width: 768px) { .page-banner { padding: 4rem 0; } }
.page-banner h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.025em;
  line-height: 0.95;
  margin-top: 0.75rem;
  text-transform: capitalize;
}
.banner-desc {
  margin-top: 1rem;
  font-size: 1.0625rem;
  color: var(--ink-600);
  max-width: 36rem;
  line-height: 1.625;
}

/* ---- 9. Sections / Article Grid ---- */
.section-articles {
  padding: 3rem 0;
}
@media (min-width: 768px) { .section-articles { padding: 4rem 0; } }
.section-articles--alt { background: var(--ink-100); }
.section-heading {
  margin-bottom: 2rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.section-heading h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.02em;
}
.article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 640px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); gap: 1.75rem; }
}
@media (min-width: 1024px) {
  .article-grid { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}

/* ---- 10. Article Card ---- */
.article-card {
  display: flex;
  flex-direction: column;
}
.card-link { display: block; }
.card-img {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--ink-200);
  aspect-ratio: 4 / 3;
}
.card-img-inner {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 500ms var(--ease);
}
.article-card:hover .card-img-inner { transform: scale(1.04); }
.card-img-placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--ink-200) 0%, var(--ink-300) 100%);
}
.card-badge {
  position: absolute;
  top: 0.75rem; left: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(12,11,10,.85);
  color: var(--ink-50);
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  white-space: nowrap;
}
.card-body {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-body .eyebrow { margin-bottom: 0.5rem; }
.card-title {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink-900);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}
.card-title a {
  color: inherit;
  transition: color var(--dur) var(--ease);
}
.article-card:hover .card-title a { color: var(--signal-600); }
.card-excerpt {
  font-size: 0.875rem;
  color: var(--ink-600);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  flex: 1;
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--ink-400);
}

/* ---- 11. Breadcrumb ---- */
.breadcrumb {
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--ink-200);
}
.breadcrumb .container { }
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--ink-400);
}
.breadcrumb-item { display: flex; align-items: center; gap: 0.25rem; }
.breadcrumb-item a {
  color: var(--ink-500);
  transition: color var(--dur) var(--ease);
}
.breadcrumb-item a:hover { color: var(--signal-600); }
.breadcrumb-sep { color: var(--ink-300); }

/* ---- 12. Article Page ---- */
.article-wrapper { padding: 2rem 0 4rem; }
@media (min-width: 768px) { .article-wrapper { padding: 3rem 0 5rem; } }
.article-prose {
  max-width: var(--max-w-prose);
  margin: 0 auto;
}
.article-header { margin-bottom: 2.5rem; }
.article-header .eyebrow { margin-bottom: 0.75rem; }
.article-title {
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.025em;
  line-height: 0.95;
  margin-top: 0.5rem;
}
.article-summary {
  margin-top: 1.25rem;
  font-size: 1.125rem;
  color: var(--ink-600);
  line-height: 1.625;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--ink-200);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-500);
}
.article-meta-item { display: inline-flex; align-items: center; gap: 0.25rem; }
.article-meta-item a { color: var(--ink-700); }
.article-meta-item a:hover { color: var(--signal-600); text-decoration: underline; text-underline-offset: 2px; }
.article-meta-sep { color: var(--ink-300); }

/* ---- 13. Prose (article body) ---- */
.prose { font-size: 1.0625rem; line-height: 1.75; color: var(--ink-800); }
.prose p { margin-bottom: 1.25rem; }
.prose h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}
.prose h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink-900);
  line-height: 1.2;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.prose a { color: var(--signal-600); text-underline-offset: 2px; }
.prose a:hover { text-decoration: underline; }
.prose strong { font-weight: 700; color: var(--ink-900); }
.prose em { font-style: italic; }
.prose ul, .prose ol { margin: 1rem 0 1.25rem 1.5rem; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.375rem; }
.prose blockquote {
  border-left: 3px solid var(--signal-500);
  padding: 0.75rem 1.25rem;
  background: var(--signal-50);
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--ink-700);
}
.prose img {
  border-radius: var(--radius-md);
  margin: 1.5rem auto;
  width: 100%;
  height: auto;
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--ink-100);
  padding: 0.125em 0.375em;
  border-radius: var(--radius-sm);
  color: var(--ink-800);
}
.prose pre {
  background: var(--ink-900);
  color: var(--ink-100);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}
.prose pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.prose hr {
  border: none;
  border-top: 1px solid var(--ink-200);
  margin: 2rem 0;
}
.prose figure { margin: 1.5rem 0; }
.prose figcaption {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--ink-400);
  text-align: center;
  font-family: var(--font-mono);
}

/* Tables */
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1.5rem 0;
  display: block;
  overflow-x: auto;
}
.prose thead tr { border-bottom: 2px solid var(--ink-900); }
.prose th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-500);
  font-weight: 500;
}
.prose td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--ink-200);
  color: var(--ink-700);
  vertical-align: top;
}
.prose tr:nth-child(odd) td { background: rgba(247,247,245,.5); }
.prose tr:hover td { background: var(--volt-50); }

/* ---- 14. FAQ Section ---- */
.faq-section {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--ink-200);
}
.faq-section h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
.faq-item {
  border-bottom: 1px solid var(--ink-200);
}
.faq-item:first-of-type { border-top: 1px solid var(--ink-200); }
.faq-summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-question {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink-900);
  line-height: 1.3;
  transition: color var(--dur) var(--ease);
  flex: 1;
}
.faq-item[open] .faq-question,
.faq-summary:hover .faq-question { color: var(--signal-600); }
.faq-icon {
  flex-shrink: 0;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ink-400);
  line-height: 1;
  margin-top: 0.125rem;
  transition: transform 300ms var(--ease);
}
.faq-item[open] .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 0 1.25rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink-700);
}

/* ---- 15. Page Content (static pages) ---- */
.page-content-wrapper { padding: 3rem 0 5rem; }
.page-content { max-width: var(--max-w-prose); }
.page-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

/* ---- 16. Pagination ---- */
.pagination-wrapper { padding-top: 3rem; }
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
}
.page-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  color: var(--ink-700);
  border: 1px solid var(--ink-200);
  background: var(--surface);
}
a.page-item:hover,
a.page-link:hover {
  background: var(--ink-100);
  color: var(--ink-900);
  border-color: var(--ink-300);
}
.page-item--active {
  background: var(--ink-900);
  color: var(--ink-50);
  border-color: var(--ink-900);
  font-weight: 600;
}
.page-item--disabled {
  opacity: 0.4;
  pointer-events: none;
}
.page-item--ellipsis { border: none; background: none; }
.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  height: 2.25rem;
  padding: 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  color: var(--ink-700);
  border: 1px solid var(--ink-200);
  background: var(--surface);
}

/* ---- 17. Error / 404 Page ---- */
.error-page {
  padding: 6rem 0;
  text-align: center;
}
.error-code {
  font-size: 0.75rem;
  display: block;
  margin-bottom: 1rem;
}
.error-page h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}
.error-page p {
  font-size: 1.0625rem;
  color: var(--ink-600);
  max-width: 36rem;
  margin: 0 auto 0.75rem;
  line-height: 1.625;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  padding: 0.75rem 1.5rem;
  background: var(--ink-900);
  color: var(--ink-50);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background var(--dur) var(--ease);
  text-decoration: none;
}
.btn-primary:hover { background: var(--ink-700); color: var(--ink-50); }
.btn-primary:active { background: var(--ink-800); }
.error-categories { margin-top: 3rem; }
.error-categories .eyebrow { margin-bottom: 1rem; }
.error-cat-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.error-cat-list a {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  border: 1px solid var(--ink-200);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-700);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.error-cat-list a:hover { border-color: var(--ink-500); color: var(--ink-900); }

/* ---- 18. Footer ---- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--ink-200);
  background: var(--ink-900);
  color: var(--ink-300);
}
.site-footer-inner {
  padding-top: 3.5rem;
  padding-bottom: 2rem;
}
.footer-grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
  margin-bottom: 2.5rem;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; gap: 3rem; }
}
.footer-brand { }
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  margin-bottom: 1rem;
}
.footer-logo .logo-icon { background: var(--ink-50); }
.footer-logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-50);
}
.footer-tagline {
  font-size: 0.875rem;
  color: var(--ink-400);
  line-height: 1.625;
  max-width: 28rem;
  margin-bottom: 1.25rem;
}
.footer-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--volt-400);
}
.footer-col-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--volt-400);
  margin-bottom: 1rem;
}
.footer-links { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-links a {
  font-size: 0.875rem;
  color: var(--ink-300);
  transition: color var(--dur) var(--ease);
}
.footer-links a:hover { color: var(--volt-300); }
.footer-bottom {
  border-top: 1px solid var(--ink-800);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--ink-500);
}
.footer-bottom--solo {
  border-top: none;
  padding-top: 0;
  justify-content: center;
}

/* ---- 19. Main grows ---- */
main { flex: 1; }

/* ---- 20. Global link hover fallback ---- */
a:not([class]):hover { color: var(--signal-600); }