/* ============================================================
   AI REVOLUTION — LIGHT EDITORIAL THEME (2026-04-26)
   Sole source of truth for AI Revolution branding.
   Distinct from The Tech Room (dark navy + blue):
     - Cream / off-white background
     - Deep ink body
     - Amber accent (#d97706)
     - Serif body (Newsreader) for magazine feel
     - Inter Tight retained for display headlines
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,400;1,6..72,500&family=Inter+Tight:wght@600;700;800;900&family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* === LIGHT EDITORIAL PALETTE === */
  --bg-primary: #faf8f3;       /* warm cream */
  --bg-secondary: #f3efe6;     /* slightly darker cream for cards */
  --bg-card: #ffffff;          /* pure white card surface */
  --bg-card-hover: #fefcf8;    /* subtle warm hover */
  --surface: #f7f3eb;
  --paper: #ffffff;

  /* Borders — subtle warm gray */
  --border: rgba(60, 50, 40, 0.10);
  --border-hover: rgba(60, 50, 40, 0.20);
  --border-strong: rgba(60, 50, 40, 0.30);

  /* Text — deep warm ink, not pure black */
  --text-primary: #1a1410;     /* near-black, warm undertone */
  --text-secondary: #4a4238;   /* readable warm gray */
  --text-muted: #837868;       /* muted warm */

  /* Brand accent — burnt amber */
  --accent: #b45309;           /* deep amber */
  --accent-light: #d97706;     /* lighter amber for hover/highlights */
  --accent-dark: #92400e;      /* darker amber for text on light */
  --accent-glow: rgba(180, 83, 9, 0.18);
  --accent-glow-strong: rgba(180, 83, 9, 0.32);

  /* Typography */
  --font-display: 'Inter Tight', 'Inter', system-ui, sans-serif;
  --font-body: 'Newsreader', 'Iowan Old Style', 'Charter', Georgia, serif;
  --font-sans: 'Inter', system-ui, sans-serif;

  --reading-width: 65ch;
  --container-max: 1180px;
  color-scheme: light;
}

/* ----------------------------------------------------------------
   Force light theme on body — overrides dark style.css base
   ---------------------------------------------------------------- */
html, body {
  background: var(--bg-primary) !important;
  color: var(--text-primary) !important;
}
body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

/* Drop dark-theme decorative elements entirely */
.bg-grid, .glow-orb { display: none !important; }

/* ----------------------------------------------------------------
   Typography — magazine hierarchy
   ---------------------------------------------------------------- */
h1, h2, h3, h4, h5,
.heading-xl, .heading-lg, .heading-md, .heading-sm {
  font-family: var(--font-display);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.heading-xl, h1 {
  font-size: clamp(2.4rem, 5vw, 3.85rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
}
.heading-lg, h2 { font-size: clamp(1.6rem, 2.8vw, 2.1rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
.heading-md, h3 { font-size: clamp(1.2rem, 1.8vw, 1.45rem); font-weight: 700; line-height: 1.25; }
.heading-sm, h4 { font-size: 1.05rem; font-weight: 700; line-height: 1.3; }

p, .body-lg {
  color: var(--text-secondary);
  max-width: var(--reading-width);
}
.body-lg { font-size: 1.15rem; line-height: 1.65; }

a { color: inherit; transition: color 0.2s; }
a:hover { color: var(--accent); }

.text-gradient {
  background: none !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  color: var(--text-primary) !important;
}

/* ----------------------------------------------------------------
   Top bar (light editorial nav)
   ---------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 1000;
  padding: 1.25rem 0;
  background: rgba(250, 248, 243, 0.92);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  display: flex; align-items: center; justify-content: space-between;
}
.topbar .brand {
  display: flex; align-items: center; gap: 0.65rem;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.topbar .brand-mark {
  background: var(--accent) !important;
  color: #fff !important;
  width: 30px; height: 30px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 800;
  font-family: var(--font-sans);
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 2px var(--accent-glow);
}
.topbar .brand-name { font-family: var(--font-display); }
.topbar .nav-links {
  display: flex; align-items: center; gap: 1.6rem;
  list-style: none; margin: 0; padding: 0;
}
.topbar .nav-links a {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.4rem 0;
  position: relative;
}
.topbar .nav-links a:not(.cta):hover { color: var(--text-primary); }
.topbar .nav-links a:not(.cta):hover::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 1.5px; background: var(--accent);
}
.topbar .nav-links a.cta {
  background: var(--accent);
  color: #fff;
  padding: 0.55rem 1.1rem;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.005em;
}
.topbar .nav-links a.cta:hover {
  background: var(--accent-light);
  color: #fff;
}

/* ----------------------------------------------------------------
   Hero (magazine masthead)
   ---------------------------------------------------------------- */
.hero {
  padding: 4.5rem 0 3rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}
.hero .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}
.hero .eyebrow,
.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5.6vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.02;
  color: var(--text-primary);
  max-width: 22ch;
  margin: 0 0 1.4rem;
}
.hero .lede {
  font-family: var(--font-body);
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 60ch;
  margin: 0 0 2rem;
}
.hero-cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.hero-narrow { padding: 4rem 0 2rem; min-height: auto; }
.hero-narrow h1 { font-size: clamp(2.2rem, 4.8vw, 3.4rem); max-width: 30ch; }

/* ----------------------------------------------------------------
   Buttons
   ---------------------------------------------------------------- */
.btn, .btn-primary, .btn-secondary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.78rem 1.4rem;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-hover);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ----------------------------------------------------------------
   Pillars section
   ---------------------------------------------------------------- */
.pillars {
  padding: 4rem 0 1rem;
  background: var(--bg-primary);
}
.pillars .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}
.pillars h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.75rem;
  color: var(--text-primary);
}
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.pillar-card {
  display: block;
  padding: 1.5rem 1.6rem 1.75rem;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  font-family: var(--font-body);
}
.pillar-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(60, 40, 20, 0.08);
}
.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 0.55rem;
  color: var(--text-primary);
}
.pillar-card p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
  max-width: none;
}

/* ----------------------------------------------------------------
   Latest section + article grid (pillar pages + homepage)
   ---------------------------------------------------------------- */
.latest, .article-list {
  padding: 3rem 0 4.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}
.latest .container, .article-list .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}
.latest h2, .article-list h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  color: var(--text-primary);
}
.muted {
  font-family: var(--font-sans);
  color: var(--text-muted);
  font-size: 0.92rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1.75rem;
}
.article-card {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 10px 24px rgba(60, 40, 20, 0.10);
}
.article-card__image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}
.article-card__image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
  filter: saturate(0.95);
}
.article-card:hover .article-card__image img { transform: scale(1.04); filter: saturate(1.05); }
.article-card__body {
  padding: 1.1rem 1.3rem 1.5rem;
  flex: 1;
  display: flex; flex-direction: column;
  gap: 0.45rem;
}
.article-card__pillar {
  font-family: var(--font-sans) !important;
  font-size: 0.68rem !important;
  text-transform: uppercase !important;
  letter-spacing: 0.22em !important;
  color: var(--accent) !important;
  font-weight: 700 !important;
}
.article-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 0;
}
.article-card p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
  max-width: none;
}
.article-card time {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* ----------------------------------------------------------------
   AdSense slot
   ---------------------------------------------------------------- */
.ad-slot, .ad-slot-inline {
  margin: 2.5rem auto;
  max-width: var(--container-max);
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

/* ----------------------------------------------------------------
   Footer
   ---------------------------------------------------------------- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
  margin-top: 0;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-muted);
}
footer .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  text-align: center;
}
footer a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 0.15rem;
}
footer a:hover { color: var(--accent); }

/* ----------------------------------------------------------------
   Article body — magazine reading experience
   ---------------------------------------------------------------- */
.article-content,
article.article-body {
  max-width: var(--reading-width);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 4vw, 2.5rem);
  font-family: var(--font-body);
  font-size: 1.115rem;
  line-height: 1.7;
  color: var(--text-primary);
}
.article-content h1, article.article-body h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
  color: var(--text-primary);
}
.article-content h2, article.article-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 1.7rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 2.25rem 0 0.85rem;
  color: var(--text-primary);
}
.article-content h3, article.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  line-height: 1.3;
  margin: 1.75rem 0 0.7rem;
  color: var(--text-primary);
}
.article-content p, article.article-body p { margin: 0 0 1.3rem; max-width: none; color: var(--text-primary); }
.article-content a, article.article-body a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.article-content a:hover, article.article-body a:hover {
  color: var(--accent);
  text-decoration-thickness: 2px;
}
.article-content blockquote, article.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 1.25rem;
  margin: 1.75rem 0;
  font-style: italic;
  color: var(--text-primary);
  background: var(--bg-secondary);
}

/* Drop-cap on first paragraph of article body */
.article-content > p:first-of-type::first-letter,
article.article-body > p:first-of-type::first-letter {
  font-family: var(--font-display);
  font-size: 3.6em;
  font-weight: 800;
  float: left;
  line-height: 0.85;
  margin: 0.1em 0.1em 0 -0.05em;
  color: var(--accent);
}

/* ----------------------------------------------------------------
   Override anything from style.css that uses dark colors
   ---------------------------------------------------------------- */
.featured-card, .news-card, .news-list-item, .card, .cta-section, .highlights-box {
  background: var(--paper) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border) !important;
}
.featured-card__title, .news-list-item__title, .news-card__title, .card__title {
  color: var(--text-primary) !important;
  font-family: var(--font-display) !important;
}
.featured-card__text, .news-list-item__text, .news-card__text, .card__text, .featured-card__excerpt {
  color: var(--text-secondary) !important;
  font-family: var(--font-body) !important;
}
.featured-card__tag, .news-card__tag, .news-list-item__tag, .cat-feature__tag,
.cat-header__viewall {
  color: var(--accent) !important;
  background: transparent !important;
  border-radius: 0 !important;
  letter-spacing: 0.22em !important;
  font-family: var(--font-sans) !important;
  text-transform: uppercase !important;
  font-weight: 700 !important;
  font-size: 0.7rem !important;
}

/* ----------------------------------------------------------------
   Mobile
   ---------------------------------------------------------------- */
@media (max-width: 768px) {
  .topbar .nav-links { gap: 0.85rem; flex-wrap: wrap; }
  .topbar .nav-links a:not(.cta) { font-size: 0.85rem; }
  .pillar-grid { grid-template-columns: 1fr; }
  .hero { padding: 3rem 0 2rem; }
  .hero h1 { font-size: clamp(2rem, 7vw, 2.6rem); }
  .article-grid { grid-template-columns: 1fr; }
}

/* ----------------------------------------------------------------
   Subtle scroll-fade for hero on inner pages
   ---------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .hero, .page-header, .hero-narrow {
    animation: fadeUp 0.6s ease-out;
  }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}