/* ===== RESET & BASE ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #222;
  background: #fff;
  line-height: 1.75;
  font-size: 16px;
}

/* ===== HEADER ===== */
header {
  background: #1F4E79;
  color: white;
  padding: 2.5rem 2rem;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 0.3rem;
  letter-spacing: -0.5px;
}

.subtitle {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: 0.3rem;
}

.meta {
  font-size: 0.88rem;
  opacity: 0.65;
}

/* ===== MAIN LAYOUT ===== */
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

section {
  margin-bottom: 3rem;
}

/* ===== HEADINGS ===== */
h2 {
  color: #1F4E79;
  font-size: 1.35rem;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #dce9f5;
}

h3 {
  color: #2E75B6;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

p {
  margin-bottom: 0.9rem;
}

/* ===== LINKS ===== */
a {
  color: #2E75B6;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===== TABLE ===== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th {
  background: #1F4E79;
  color: white;
  padding: 0.65rem 1rem;
  text-align: left;
  font-weight: 600;
}

td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid #e4eef7;
}

tr:nth-child(even) td {
  background: #f7fafd;
}

/* ===== CODE BLOCKS ===== */
pre {
  background: #f4f7fb;
  border-left: 4px solid #2E75B6;
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  border-radius: 0 4px 4px 0;
  margin: 1rem 0 1.5rem;
  font-size: 0.88rem;
}

code {
  font-family: 'Courier New', Consolas, monospace;
  font-size: 0.88rem;
  color: #1a1a2e;
}

/* inline code */
p code, li code {
  background: #eef3fb;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.85rem;
  color: #1F4E79;
}

/* ===== LISTS ===== */
ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

/* ===== FAQ ITEMS ===== */
.faq-item {
  background: #f7fafd;
  border-left: 4px solid #2E75B6;
  border-radius: 0 6px 6px 0;
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
}

.faq-item h3 {
  margin-bottom: 0.35rem;
}

.faq-item p {
  margin-bottom: 0;
  font-size: 0.97rem;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 2rem;
  color: #999;
  font-size: 0.88rem;
  border-top: 1px solid #eee;
  margin-top: 1rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  header { padding: 1.5rem 1rem; }
  header h1 { font-size: 1.5rem; }
  main { padding: 1.5rem 1rem; }
  pre { font-size: 0.8rem; }
  th, td { padding: 0.5rem 0.6rem; }
}