/* ============================================================
   LLM Launch Readiness — Main Stylesheet
   Light theme only.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ── Spacing tokens ── */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Colors */
  --primary:       #2563eb;
  --primary-hover: #1d4ed8;
  --accent:        #f59e0b;
  --text-main:     #0f172a;
  --text-muted:    #64748b;
  --bg-main:       #ffffff;
  --bg-alt:        #f8fafc;
  --bg-card:       #ffffff;
  --border:        #e2e8f0;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 2px 4px rgba(15, 23, 42, 0.07);

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius:    0.75rem;
  --max-width: 1100px;
  --header-h:  56px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-family: var(--font-sans);
  color: var(--text-main);
  background: var(--bg-main);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body { overflow-x: hidden; }

/* ── Typography ── */
h1, h2, h3, h4 {
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 700;
}

h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-top: 0; margin-bottom: var(--space-4); }

h2 {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  margin-top: 1rem;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
}

p  { margin-bottom: var(--space-4); color: var(--text-muted); }
a  { color: var(--primary); text-decoration: none; transition: color .18s; }
a:hover { color: var(--primary-hover); text-decoration: underline; }
ul, ol { margin-bottom: var(--space-4); padding-left: var(--space-6); }
li { margin-bottom: var(--space-2); color: var(--text-muted); }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

.prose {
  max-width: 680px;
}

/* ── Section spacing (exact values from instructions) ── */
section {
  padding: 2.5rem 0;
}

@media (min-width: 768px) {
  section {
    padding: 3.25rem 0;
  }
}

/* ── Accessibility ── */
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--primary); color: #fff;
  padding: 8px; z-index: 1000;
  transition: top .2s;
}
.skip-link:focus { top: 0; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ── Disclosure Banner ── */
.disclosure-banner {
  background: #fffbeb;
  border-bottom: 1px solid #fde68a;
  padding: var(--space-2) 0;
  font-size: .8rem;
  color: #92400e;
}
.disclosure-banner a { color: #b45309; font-weight: 600; }

/* ── Header — smaller height per instructions ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-main);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  display: flex; align-items: center;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex; justify-content: space-between; align-items: center; width: 100%;
}
.logo-img { height: 32px; width: auto; display: block; }
.logo { text-decoration: none; display: flex; align-items: center; gap: var(--space-3); }
.logo:hover { text-decoration: none; opacity: .88; }
.logo-tagline {
  font-size: .7rem;
  color: var(--text-muted);
  font-weight: 400;
  display: none;
}
@media (min-width: 900px) {
  .logo-tagline { display: block; }
}

.main-nav { display: none; }
@media (min-width: 768px) {
  .main-nav {
    display: flex; gap: var(--space-5); align-items: center;
  }
  .main-nav a { color: var(--text-muted); font-weight: 500; font-size: .85rem; }
  .main-nav a:hover { color: var(--primary); text-decoration: none; }
}

/* ── Buttons — one primary, one secondary only ── */
.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: .9rem;
  text-align: center;
  cursor: pointer;
  transition: background .18s, box-shadow .18s;
  border: none;
  text-decoration: none;
  line-height: 1.4;
}
.btn:hover { text-decoration: none; }

/* Primary */
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }

/* Secondary / outline */
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ── Hero — exact values from instructions ── */
.hero {
  padding: 3rem 0 2.5rem;
  background: var(--bg-main);
}

.hero-home { max-width: 720px; }

.hero-brand-logo {
  height: 44px; width: auto;
  display: block;
  margin-bottom: var(--space-5);
}

.hero-home h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  margin-bottom: var(--space-4);
}

.hero-subhead {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  max-width: 600px;
}

.hero-cta-group {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  align-items: center;
}

/* Article hero */
.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (min-width: 992px) {
  .hero-content { grid-template-columns: 3fr 2fr; }
}

.hero-meta {
  font-size: .8rem; color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.hero-cta-wrapper { margin-top: var(--space-5); }

/* ── Facts box (replaces launch card in hero) ── */
.facts-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
}
.facts-box h3 { margin-top: 0; font-size: .9rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; }
.facts-box ul { margin-bottom: 0; }
.facts-box li { font-size: .9rem; }

/* ── Trust Strip ── */
.trust-strip {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: var(--space-3) 0;
}
.trust-strip-inner {
  display: flex; flex-wrap: wrap;
  gap: var(--space-5);
  justify-content: center;
  font-size: .82rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* ── Images ── */
.hero-banner-img {
  width: 100%; border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: block; margin: var(--space-6) 0;
}
.product-img {
  width: 100%; max-width: 820px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: block; margin: var(--space-6) auto;
  border: 1px solid var(--border);
}
.section-img {
  width: 100%; border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: block; margin: var(--space-5) auto;
}

/* ── Grids — exact values from instructions ── */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 1rem; }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
}

/* ── Cards — exact values from instructions ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.125rem;
  height: 100%;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}
.card h3 {
  margin-top: 0;
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
}

/* ── Article Cards ── */
.article-cards { margin-top: var(--space-5); }
.article-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  text-decoration: none;
  transition: box-shadow .18s, border-color .18s;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
  overflow: hidden;
}
.article-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}
.article-card--coming { cursor: default; opacity: .65; }
.article-card--coming:hover { border-color: var(--border); box-shadow: 0 1px 2px rgba(15,23,42,.05); }
.article-card-body { padding: 1.125rem; }
.article-tag {
  display: inline-block;
  font-size: .72rem; font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: var(--space-2);
}
.article-card h3 {
  margin-top: var(--space-2);
  border-bottom: none;
  padding-bottom: 0;
  font-size: 1rem;
  color: var(--text-main);
}
.article-card p { font-size: .875rem; margin-top: var(--space-2); }
.article-cta {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
}
.coming-soon { color: var(--text-muted); }

/* ── Use Case Cards ── */
.use-case-card h3 { color: var(--primary); border-bottom: none; padding-bottom: 0; }

/* ── Quick decision matrix ── */
.verdict-matrix { margin: var(--space-5) 0; }
.verdict-matrix .card { border-left: 3px solid var(--primary); }
.verdict-matrix .card:nth-child(2) { border-left-color: var(--accent); }
.verdict-matrix .card:nth-child(3) { border-left-color: var(--text-muted); }

/* ── Tables — tighter row padding, lighter borders ── */
.table-responsive { overflow-x: auto; margin: var(--space-5) 0; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td {
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--border);
  font-size: .875rem;
}
th { background: var(--bg-alt); font-weight: 600; color: var(--text-main); }
tr:hover td { background: #f8fafc; }

/* ── Callout ── */
.callout {
  background: rgba(37,99,235,.05);
  border-left: 3px solid var(--primary);
  padding: var(--space-4);
  margin: var(--space-5) 0;
  border-radius: 0 0.5rem 0.5rem 0;
  color: var(--text-main);
  font-size: .9rem;
}

/* ── FAQ — exact values from instructions ── */
.faq-item {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}
.faq-item h3 { margin-top: 0; font-size: 1rem; }

/* ── Footer ── */
.site-footer {
  background: var(--bg-alt);
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-logo { height: 32px; width: auto; margin: 0 auto var(--space-5); display: block; }
.footer-nav {
  display: flex; flex-wrap: wrap;
  justify-content: center; gap: var(--space-5); margin-bottom: var(--space-5);
}
.footer-nav a { color: var(--text-muted); font-size: .82rem; }
.copyright { color: var(--text-muted); font-size: .78rem; }

/* ── Mobile sticky CTA — hidden per instructions ── */
.mobile-sticky-cta { display: none; }