/* Wired Innovations — base stylesheet
   System fonts only (no font requests = faster first paint).
   Mobile-first, minimal CSS, no framework dependency. */

:root{
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --bg-soft: #eef0fa;
  --text: #13151c;
  --text-muted: #565d72;
  --border: #e4e6ef;
  --accent: #6d4bff;
  --accent-2: #12c7c0;
  --accent-ink: #ffffff;
  --card-bg: #ffffff;
  --shadow: 0 1px 2px rgba(20,20,40,.04), 0 8px 24px -12px rgba(30,20,90,.14);
  --shadow-hover: 0 4px 10px rgba(20,20,40,.06), 0 16px 32px -14px rgba(30,20,90,.22);
  --max-width: 1120px;
  --radius: 12px;
  --hero-grad: linear-gradient(120deg, #efeaff 0%, #e9f0ff 45%, #e4faf7 100%);
  --header-bg: rgba(255,255,255,.86);
  color-scheme: light;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0e0f16;
    --bg-alt: #161824;
    --bg-soft: #1b1e2d;
    --text: #edeef5;
    --text-muted: #a4a9bf;
    --border: #2b2e40;
    --accent: #9d85ff;
    --accent-2: #34e2d8;
    --accent-ink: #10121b;
    --card-bg: #161824;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 28px -14px rgba(0,0,0,.6);
    --shadow-hover: 0 4px 10px rgba(0,0,0,.35), 0 18px 36px -14px rgba(0,0,0,.7);
    --hero-grad: linear-gradient(120deg, #1c1730 0%, #141c33 45%, #0f2320 100%);
    --header-bg: rgba(14,15,22,.86);
    color-scheme: dark;
  }
}

*, *::before, *::after{ box-sizing: border-box; }

html{ -webkit-text-size-adjust: 100%; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  font-size: 17px;
}

img, svg{ max-width: 100%; display: block; }

a{ color: var(--accent); text-decoration: none; }
a:hover{ text-decoration: underline; }

.container{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Skip link for accessibility */
.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus{ left: 0; }

/* Header */
.site-header{
  border-bottom: 1px solid var(--border);
  background: var(--header-bg);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand:hover{ text-decoration: none; }
.brand-mark{
  width: 32px; height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.brand-mark svg{ width: 100%; height: 100%; }

.nav-toggle{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}
.nav-toggle svg{ width: 20px; height: 20px; }

.main-nav{
  display: none;
  border-top: 1px solid var(--border);
}
.main-nav.open{ display: block; }
.main-nav ul{
  list-style: none;
  margin: 0;
  padding: 10px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.main-nav a{
  display: block;
  padding: 8px 4px;
  color: var(--text);
  font-weight: 600;
  font-size: .95rem;
}
.main-nav a:hover{ color: var(--accent); text-decoration: none; }
.main-nav a[aria-current="page"]{ color: var(--accent); }

@media (min-width: 860px){
  .nav-toggle{ display: none; }
  .main-nav{ display: block; border-top: none; }
  .main-nav ul{
    flex-direction: row;
    flex-wrap: wrap;
    padding: 0;
    gap: 2px;
  }
  .main-nav li{ position: relative; }
  .main-nav a{ padding: 8px 10px; border-radius: 8px; }
  .main-nav a:hover{ background: var(--bg-soft); }
  .main-nav a[aria-current="page"]{ background: var(--bg-soft); }
  .header-inner{ padding: 14px 20px; }
}

/* Hero */
.hero{
  padding: 56px 0 44px;
  border-bottom: 1px solid var(--border);
  background: var(--hero-grad);
  position: relative;
  overflow: hidden;
}
.hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 2px 2px, rgba(109,75,255,.16) 1.5px, transparent 0);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.7), transparent 85%);
  pointer-events: none;
}
@media (prefers-color-scheme: dark){
  .hero::before{
    background-image:
      radial-gradient(circle at 2px 2px, rgba(157,133,255,.18) 1.5px, transparent 0);
  }
}
.hero .container{ position: relative; }
.hero h1{
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  background: linear-gradient(100deg, var(--accent), #3d7bff 55%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p{
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 60ch;
  margin: 0;
}

/* Section grid on homepage */
.section-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 40px 0;
}
@media (min-width: 640px){
  .section-grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px){
  .section-grid{ grid-template-columns: repeat(4, 1fr); }
}

.card{
  --accent-local: var(--accent);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent-local);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover{ transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.card h3{ margin: 0; font-size: 1.1rem; }
.card h3 a{ color: var(--text); }
.card h3 a:hover{ color: var(--accent-local); text-decoration: none; }
.card p{ color: var(--text-muted); margin: 0; font-size: .95rem; flex-grow: 1; }
.card .card-link{ font-weight: 700; font-size: .9rem; color: var(--accent-local); }

/* Article listing */
.article-list{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 8px 0 48px;
}
@media (min-width: 700px){
  .article-list{ grid-template-columns: repeat(2, 1fr); }
}

.article-card{
  --accent-local: var(--accent);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-local);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease;
}
.article-card:hover{ transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.article-card .eyebrow{
  text-transform: uppercase;
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--accent-local);
  font-weight: 800;
  margin-bottom: 6px;
  display: block;
}
.article-card h3{ margin: 0 0 8px; font-size: 1.15rem; line-height: 1.35; }
.article-card h3 a{ color: var(--text); }
.article-card h3 a:hover{ color: var(--accent-local); text-decoration: none; }
.article-card p{ margin: 0; color: var(--text-muted); font-size: .95rem; }

/* Page/section header */
.page-header{
  --accent-local: var(--accent);
  padding: 34px 0 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent-local) 7%, var(--bg)) 0%, var(--bg) 100%);
}
.page-header h1{
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  letter-spacing: -0.01em;
  color: var(--accent-local);
}
.page-header p{ color: var(--text-muted); margin: 0; max-width: 70ch; }

.subsection-pills{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}
.pill{
  --accent-local: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent-local) 45%, var(--border));
  border-radius: 999px;
  padding: 6px 14px;
  font-size: .85rem;
  font-weight: 700;
  color: var(--accent-local);
  background: color-mix(in srgb, var(--accent-local) 10%, var(--bg));
}
.pill:hover{ background: color-mix(in srgb, var(--accent-local) 18%, var(--bg)); text-decoration: none; }

/* Breadcrumbs */
.breadcrumbs{
  font-size: .85rem;
  color: var(--text-muted);
  padding: 14px 0 0;
}
.breadcrumbs a{ color: var(--text-muted); font-weight: 600; }
.breadcrumbs a:hover{ color: var(--accent); }
.breadcrumbs .sep{ margin: 0 6px; }

/* Article page */
.article{
  --accent-local: var(--accent);
  padding: 26px 0 56px;
  max-width: 76ch;
  margin: 0 auto;
}
.article .eyebrow{
  text-transform: uppercase;
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--accent-local);
  font-weight: 800;
}
.article h1{
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.25;
  margin: 10px 0 12px;
  letter-spacing: -0.015em;
}
.article .dek{
  color: var(--text-muted);
  font-size: 1.1rem;
  margin: 0 0 18px;
}
.article .meta{
  color: var(--text-muted);
  font-size: .85rem;
  margin: 0 0 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border);
}
.article h2{
  font-size: 1.35rem;
  margin: 34px 0 12px;
  letter-spacing: -0.01em;
  color: var(--text);
  position: relative;
  padding-left: 14px;
  border-left: 3px solid var(--accent-local);
}
.article p{ margin: 0 0 16px; }
.article p:last-child{ margin-bottom: 0; }

.related{
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.related h2{ font-size: 1.2rem; margin: 0 0 16px; border: none; padding: 0; color: var(--text); }
.related ul{ list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.related li{
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-local);
  border-radius: 8px;
  padding: 12px 14px;
  background: var(--card-bg);
}
.related a{ font-weight: 700; color: var(--text); }
.related a:hover{ color: var(--accent-local); text-decoration: none; }

/* Footer */
.site-footer{
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  background-image: linear-gradient(90deg, var(--accent), var(--accent-2));
  background-repeat: no-repeat;
  background-size: 100% 3px;
  margin-top: 40px;
}
.footer-inner{
  padding: 40px 20px 32px;
  display: grid;
  gap: 26px;
  grid-template-columns: 1fr;
}
@media (min-width: 780px){
  .footer-inner{ grid-template-columns: 1.4fr repeat(3, 1fr); }
}
.footer-col h4{
  margin: 0 0 12px;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
}
.footer-col ul{ list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer-col a{ color: var(--text); font-size: .92rem; }
.footer-col a:hover{ color: var(--accent); }
.footer-brand{ display: flex; flex-direction: column; gap: 10px; }
.footer-brand-mark{ display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.05rem; color: var(--text); }
.footer-brand-mark svg{ width: 28px; height: 28px; flex: none; }
.footer-brand p{ color: var(--text-muted); font-size: .9rem; max-width: 42ch; margin: 0; }
.footer-bottom{
  border-top: 1px solid var(--border);
  padding: 16px 20px 28px;
  font-size: .82rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

/* Utility */
.visually-hidden{
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.home-links{
  display: flex;
  justify-content: flex-end;
  padding: 18px 0 0;
}