/* ===========================
   AI Biz Guide — Main Styles
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:wght@300;400;500;600&display=swap');

:root {
  --navy: #0d1b2a;
  --teal: #00b4d8;
  --teal-dark: #0077a8;
  --cream: #f9f6f0;
  --white: #ffffff;
  --gray-100: #f4f4f4;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --accent: #e8a838;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1100px;
  --radius: 8px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--navy);
  line-height: 1.7;
}

/* ── HEADER ── */
header {
  background: var(--navy);
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.site-logo span { color: var(--teal); }

nav a {
  color: var(--gray-300);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  margin-left: 1.5rem;
  transition: color .2s;
}
nav a:hover { color: var(--teal); }

/* ── HERO ── */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, #1a3a5c 100%);
  color: var(--white);
  padding: 5rem 1.5rem 4rem;
  text-align: center;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.15;
  max-width: 780px;
  margin: 0 auto 1.25rem;
}
.hero h1 em { color: var(--teal); font-style: normal; }
.hero p {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.75);
  max-width: 580px;
  margin: 0 auto 2rem;
}
.hero-cta {
  display: inline-block;
  background: var(--teal);
  color: var(--navy);
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 1rem;
  transition: background .2s, transform .15s;
}
.hero-cta:hover { background: var(--accent); transform: translateY(-2px); }

/* ── SECTION LABELS ── */
.section-label {
  display: inline-block;
  background: var(--teal);
  color: var(--navy);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

/* ── CONTAINER ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── SECTION ── */
section { padding: 4rem 1.5rem; }
section.alt { background: var(--white); }

section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  margin-bottom: 0.5rem;
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
section > p.section-intro {
  color: var(--gray-500);
  max-width: 640px;
  margin: 0 auto 2.5rem;
  text-align: center;
}

/* ── ARTICLE GRID ── */
.article-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-300);
  transition: transform .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.1); }

.card-tag {
  background: var(--navy);
  color: var(--teal);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
}
.card-body { padding: 1.25rem 1.25rem 1.5rem; flex: 1; display: flex; flex-direction: column; }
.card-body h3 { font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 0.5rem; line-height: 1.3; }
.card-body p { color: var(--gray-500); font-size: 0.875rem; flex: 1; margin-bottom: 1rem; }
.card-link {
  color: var(--teal-dark);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.card-link::after { content: '→'; }
.card-link:hover { color: var(--navy); }

/* ── ARTICLE PAGE ── */
.article-hero {
  background: var(--navy);
  color: var(--white);
  padding: 3.5rem 1.5rem 2.5rem;
}
.article-hero .breadcrumb {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1rem;
}
.article-hero .breadcrumb a { color: var(--teal); text-decoration: none; }
.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.2;
  max-width: 800px;
  margin-bottom: 1rem;
}
.article-meta { font-size: 0.85rem; color: rgba(255,255,255,0.55); }

.article-body {
  max-width: 760px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin: 2.5rem 0 0.75rem;
  color: var(--navy);
  text-align: left;
}
.article-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
  color: var(--navy);
}
.article-body p { margin-bottom: 1.25rem; color: var(--gray-700); }
.article-body ul, .article-body ol { margin: 0 0 1.25rem 1.5rem; color: var(--gray-700); }
.article-body li { margin-bottom: 0.5rem; }

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 2rem;
  font-size: 0.9rem;
}
.article-body th {
  background: var(--navy);
  color: var(--white);
  padding: 0.65rem 1rem;
  text-align: left;
}
.article-body td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--gray-300);
}
.article-body tr:nth-child(even) td { background: var(--gray-100); }

.article-body .cta-box {
  background: linear-gradient(135deg, var(--navy), #1a3a5c);
  color: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2.5rem 0;
  text-align: center;
}
.article-body .cta-box h3 { color: var(--teal); margin-bottom: 0.5rem; }
.article-body .cta-box p { color: rgba(255,255,255,0.8); margin-bottom: 0; }

/* ── STATIC PAGES ── */
.page-hero {
  background: var(--navy);
  color: var(--white);
  padding: 3rem 1.5rem;
  text-align: center;
}
.page-hero h1 {
  font-family: var(--font-display);
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}
.page-hero p { color: rgba(255,255,255,0.6); }

.page-body {
  max-width: 760px;
  margin: 3rem auto;
  padding: 0 1.5rem 4rem;
}
.page-body h2 { font-family: var(--font-display); font-size: 1.5rem; margin: 2rem 0 0.75rem; }
.page-body p { color: var(--gray-700); margin-bottom: 1rem; }
.page-body ul { margin: 0 0 1rem 1.5rem; color: var(--gray-700); }
.page-body li { margin-bottom: 0.4rem; }

/* ── FOOTER ── */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: 0.85rem;
}
footer a { color: var(--teal); text-decoration: none; }
footer a:hover { text-decoration: underline; }
.footer-links { margin-bottom: 0.75rem; display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  nav a { margin-left: 0.75rem; font-size: 0.8rem; }
  .article-grid { grid-template-columns: 1fr; }
}