/* =========================================
   NOTES SUBPAGES STYLES
   Green header stays for individual theory pages
   Uses oval pill navigation with Theory Notes active
   ========================================= */

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #111827;
  background: #f3f4f6;
}

h1,
h2,
h3,
h4 {
  font-family: "Times New Roman", Georgia, serif;
  font-weight: 700;
}

/* ---- Theory Notes hero header (light green) ---- */

.notes-hero {
  text-align: center;
  padding: 3.5rem 2rem 3rem;
  background: linear-gradient(135deg, #4ade80, #bbf7d0);
  color: #ffffff;
}

.notes-hero h1 {
  margin: 0 0 0.5rem;
  font-size: 3.2rem;
  line-height: 1.15;
}

.notes-tagline {
  margin: 0 0 1.8rem;
  font-size: 1rem;
  opacity: 0.95;
  color: rgba(255, 255, 255, 0.95);
}

/* ---- Oval pills inside notes header ---- */

.pill-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.2rem;
}

.pill {
  display: inline-block;
  padding: 0.55rem 1.4rem;
  border-radius: 999px;
  border: 1px solid rgba(248, 250, 252, 0.6);
  background: rgba(15, 23, 42, 0.12);
  color: #f9fafb;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.pill:hover {
  background-color: rgba(15, 23, 42, 0.24);
}

.pill.active {
  background-color: #ffffff;
  border-color: #ffffff;
  color: #15803d;
}

/* ---- Core layout ---- */

.page-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ---- Reusable cards ---- */

.notes-intro-card,
.notes-card,
.advanced-notes-card {
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.06);
  border: 1px solid #e5e7eb;
}

.notes-intro-card {
  padding: 1.6rem 1.9rem;
  margin-bottom: 2rem;
}

.notes-card {
  padding: 1.8rem 1.9rem 1.6rem;
}

.notes-intro-card h2 {
  margin: 0 0 0.4rem;
}

/* ---- Optional two-column notes layout ---- */

.notes-two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

/* ---- Green badges for section headings ---- */

.notes-section-title {
  display: inline-block;
  margin-top: 1.6rem;
  margin-bottom: 0.6rem;
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  background: #bbf7d0;
  color: #065f46;
  font-size: 1.05rem;
  font-weight: 700;
}

/* ---- Topic list formatting ---- */

.notes-topic-list {
  margin: 0 0 0.8rem;
  padding-left: 1.1rem;
}

.notes-topic-list li {
  margin-bottom: 0.35rem;
  color: #374151;
  font-size: 0.97rem;
}

.notes-topic-list a {
  color: #1d4ed8;
  text-decoration: underline;
}

.notes-topic-list a:hover {
  color: #1e40af;
}

/* ---- Advanced domains card ---- */

.advanced-notes-card {
  margin-top: 2rem;
  padding: 1.8rem 1.9rem 1.6rem;
}

.advanced-notes-card h2 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.advanced-notes-card p {
  margin-top: 0;
  margin-bottom: 1rem;
  color: #4b5563;
}

.advanced-domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.domain-card {
  display: block;
  padding: 0.9rem 1.1rem;
  border-radius: 14px;
  border: 1px solid #d1fae5;
  background: #f0fdf4;
  text-decoration: none;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease;
}

.domain-card h3 {
  margin: 0 0 0.15rem;
  font-size: 1rem;
  color: #065f46;
}

.domain-card p {
  margin: 0 0 0.15rem;
  font-size: 0.95rem;
  color: #047857;
}

.domain-meta {
  display: block;
  font-size: 0.85rem;
  color: #065f46;
}

.domain-card:hover {
  background: #dcfce7;
  box-shadow: 0 10px 25px rgba(22, 163, 74, 0.15);
  transform: translateY(-1px);
}

/* ---- Footer ---- */

.site-footer {
  text-align: center;
  margin-top: 40px;
  padding: 1.5rem 1rem 2rem;
  font-size: 0.95rem;
  color: #6b7280;
  background: #f9fafb;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
  .notes-hero {
    padding: 3rem 1.2rem 2.5rem;
  }

  .notes-hero h1 {
    font-size: 2.35rem;
  }

  .page-main {
    padding: 2rem 1rem 3rem;
  }

  .notes-two-column {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}