/* ========================================================
   🔮 THE STUDY ALCHEMIST - ROOT CSS MASTER SOURCE
   ======================================================== */

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #2d3748;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

h1 {
  color: #334155;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 10px;
}

details, .topic-box {
  margin-bottom: 12px;
}

/* Main Top-Level Topic Style Box */
summary, .topic-title {
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s ease;
  border-left: 4px solid #047857;
  padding: 8px 20px;
  margin-bottom: 8px;
  background-color: #f8fafc;
  color: #047857; /* 🌟 FIX: Automatically turns top-level headings green */
}

summary:hover, .topic-title:hover {
  background-color: #f1f5f9;
}

/* Nested Collapsible Sub-Topics Layout */
details details, .sub-topic {
  margin-left: 20px;
  margin-top: 12px;
}

details details summary, .sub-topic summary {
  font-size: 0.95em;
  border-left: 2px solid #047857;
  padding: 4px 15px;
  background-color: transparent;
}

ul {
  padding-left: 30px;
}

li {
  margin-bottom: 10px;
}

/* 🌟 KEYWORD FIX: Maps bold text and AI keyword spans to theme green */
strong, .keyword {
  color: #047857;
  font-weight: 700;
}

/* Navigation System Styles */
.nav-bar {
  display: flex;
  gap: 10px;
  margin-top: 10px;
  margin-bottom: 25px;
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  background-color: #f8fafc;
  color: #475569;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.88em;
  font-weight: 500;
  border: 1px solid #e2e8f0;
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn-nav:hover {
  background-color: #047857;
  color: #ffffff;
  border-color: #047857;
  box-shadow: 0 2px 4px rgba(4, 120, 87, 0.15);
}

/* 🌟 ARROW & COLOR HARMONY FIX: Keeps headings right next to their arrows and turns them green */
summary h1,
summary h2,
summary h3,
summary h4,
summary h5,
summary h6 {
  display: inline;
  margin: 0;
  padding-left: 6px;
  color: #047857; 
}