/* Global documentation styles for AGISystem2 */

:root {
  --bg: #f7f9fc;
  --fg: #14213d;
  --accent: #0f4c81;
  --accent-soft: #e1ecf7;
  --border-soft: #ccd6e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.page {
  max-width: 960px;
  margin: 2.5rem auto 3rem auto;
  padding: 2rem 2.5rem;
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(15, 31, 60, 0.09);
}

h1 {
  margin-top: 0;
  font-size: 2.1rem;
  letter-spacing: 0.02em;
  color: var(--fg);
}

h2 {
  margin-top: 2.2rem;
  font-size: 1.5rem;
  color: var(--fg);
}

h3 {
  margin-top: 1.6rem;
  font-size: 1.2rem;
  color: var(--fg);
}

p {
  margin: 0 0 1rem 0;
  line-height: 1.7;
  text-align: justify;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #0b365d;
  background: var(--accent-soft);
}

pre {
  background: #f6f8fb;
  padding: 0.9rem 1.1rem;
  border-radius: 6px;
  border: 1px solid var(--border-soft);
  overflow-x: auto;
  font-size: 0.9rem;
}

code {
  background: #f6f8fb;
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
  border: 1px solid #e0e6f2;
  font-size: 0.9em;
}

.nav-header {
  margin-bottom: 1.8rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-soft);
}

.nav-header small {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--accent);
}

.sub-nav {
  display: block;
  margin-top: 0.75rem;
  padding: 0.5rem 0;
  border-top: 1px solid var(--border-soft);
  font-size: 0.8rem;
  color: var(--fg);
}

.sub-nav strong {
  color: var(--accent);
  font-weight: 600;
}

.sub-nav a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 0.5rem;
}

.sub-nav a:hover {
  text-decoration: underline;
}

.section-intro {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 0.9rem 1.1rem;
  border-radius: 4px;
  margin-bottom: 1.4rem;
}

.footer-nav {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-soft);
  font-size: 0.92rem;
  color: #5f6b88;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-nav a {
  margin-right: 0.8rem;
}

.nav-header a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 0.4rem;
}

.nav-header a:hover {
  text-decoration: underline;
}

.footer-nav a {
  color: var(--accent);
  text-decoration: none;
}

.footer-nav a:hover {
  text-decoration: underline;
}

.table-concept-index {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.2rem;
  margin-bottom: 1.2rem;
  font-size: 0.95rem;
}

.table-concept-index th,
.table-concept-index td {
  border: 1px solid var(--border-soft);
  padding: 0.6rem 0.7rem;
  text-align: left;
}

.table-concept-index th {
  background: #eef3fb;
  font-weight: 600;
}

.table-concept-index tr:nth-child(even) td {
  background: #fafbff;
}

.concept-link-button {
  cursor: pointer;
  color: var(--accent);
  text-decoration: underline;
}

.concept-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 20, 40, 0.45);
  display: none;
  z-index: 900;
}

.concept-modal-backdrop.is-visible {
  display: block;
}

.concept-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 720px;
  width: 90%;
  max-height: 80vh;
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 18px 45px rgba(10, 20, 40, 0.35);
  padding: 1.6rem 1.8rem;
  overflow-y: auto;
  display: none;
  z-index: 1000;
}

.concept-modal.is-visible {
  display: block;
}

.concept-modal h3 {
  margin-top: 0;
}

.concept-modal-close {
  margin-top: 1.2rem;
  display: inline-block;
  padding: 0.4rem 0.9rem;
  border-radius: 4px;
  border: 1px solid var(--border-soft);
  background: #f6f8fb;
  color: var(--fg);
  cursor: pointer;
}

.concept-modal-close:hover {
  background: var(--accent-soft);
}

.diagram {
  margin: 1.6rem 0 1.4rem 0;
  padding: 1rem 1.2rem;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  background: #f6f8fb;
}

.diagram svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto 0.75rem auto;
}

.diagram-caption {
  font-size: 0.96rem;
  color: #4a5670;
}

  margin-right: 0.8rem;
}