/* =====================================================
   Document Page Styles — Supplements styles.css
   Used on reading / activity pages that live inside
   the main site shell (header, footer, theme toggle).
   ===================================================== */

/* ---------- content-specific variables ---------- */
:root {
  --doc-tip-bg: #eaf6fb;
  --doc-tip-border: var(--primary-color, #4ad);
  --doc-warn-bg: #fff8e1;
  --doc-warn-border: #f0c040;
  --doc-code-bg: #f0f0f0;
  --doc-card-bg: #fff;
  --doc-border: #ddd;
  --doc-muted: #666;
  --doc-radius: 0.75rem;
}

body.dark-mode {
  --doc-tip-bg: #1a2a35;
  --doc-warn-bg: #2a2510;
  --doc-code-bg: #2a2a2a;
  --doc-card-bg: #252525;
  --doc-border: #444;
  --doc-muted: #aaa;
}

/* ---------- Back to course link ---------- */
.back-link {
  display: inline-block;
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--link-hover-color);
  text-decoration: underline;
}

/* ---------- Document header ---------- */
.doc-header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 3px solid var(--primary-color, #4ad);
}

.doc-header h1 {
  font-family: "Poppins", sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--secondary-color, #228);
  margin-bottom: 0.3rem;
}

body.dark-mode .doc-header h1 {
  color: var(--primary-color, #4ad);
}

.doc-header .subtitle {
  font-size: 1.1rem;
  color: var(--doc-muted);
  font-weight: 400;
  max-width: none;
}

.course-tag {
  display: inline-block;
  background: var(--primary-color, #4ad);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  margin-bottom: 0.5rem;
}

/* ---------- remove h2 gradient underline on doc pages ---------- */
.doc-content h2::after,
main:has(.doc-header) h2::after {
  display: none;
}

main:has(.doc-header) h2 {
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--doc-border);
}

body.dark-mode main:has(.doc-header) h2 {
  color: var(--tertiary-color, #fe9);
}

/* ---------- h4 for doc pages ---------- */
main:has(.doc-header) h4 {
  font-family: "Poppins", sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.2rem 0 0.4rem;
}

/* ---------- list marker accent ---------- */
main:has(.doc-header) li::marker {
  color: var(--primary-color, #4ad);
}

/* ---------- Code blocks ---------- */
pre {
  background: var(--doc-code-bg);
  padding: 1rem 1.25rem;
  border-radius: var(--doc-radius);
  overflow-x: auto;
  margin: 1rem 0;
  border-left: 4px solid var(--primary-color, #4ad);
  font-size: 0.95rem;
  line-height: 1.6;
}

pre code {
  background: none;
  padding: 0;
  margin: 0;
  font-weight: normal;
  color: inherit;
}

/* ---------- Cards ---------- */
.card {
  background: var(--doc-card-bg);
  border: 1px solid var(--doc-border);
  border-radius: var(--doc-radius);
  padding: 1.25rem 1.5rem;
  margin: 1rem 0;
}

/* ---------- Tip / Info callouts ---------- */
.tip {
  background: var(--doc-tip-bg);
  border-left: 4px solid var(--doc-tip-border);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--doc-radius) var(--doc-radius) 0;
  margin: 1.25rem 0;
}

.tip::before {
  content: "\1F4A1 Tip";
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
  color: var(--primary-color, #4ad);
}

/* ---------- Warning / Note callouts ---------- */
.warning {
  background: var(--doc-warn-bg);
  border-left: 4px solid var(--doc-warn-border);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--doc-radius) var(--doc-radius) 0;
  margin: 1.25rem 0;
}

.warning::before {
  content: "\26A0\FE0F Note";
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
  color: #c09000;
}

/* ---------- Keyboard shortcuts ---------- */
kbd {
  display: inline-block;
  background: var(--doc-card-bg);
  border: 1px solid var(--doc-border);
  border-radius: 4px;
  padding: 0.1rem 0.45rem;
  font-family: "Poppins", sans-serif;
  font-size: 0.85em;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  white-space: nowrap;
}

/* ---------- Tables ---------- */
main:has(.doc-header) table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

main:has(.doc-header) th,
main:has(.doc-header) td {
  padding: 0.6rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--doc-border);
}

main:has(.doc-header) th {
  background: var(--primary-color, #4ad);
  color: #fff;
  font-weight: 600;
}

main:has(.doc-header) tr:nth-child(even) {
  background: var(--doc-code-bg);
}

/* ---------- Two-column grid ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

@media (max-width: 700px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* ---------- Activity / checkpoint boxes ---------- */
.activity {
  background: linear-gradient(135deg, var(--doc-tip-bg), var(--doc-card-bg));
  border: 2px solid var(--primary-color, #4ad);
  border-radius: var(--doc-radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.activity::before {
  content: "\1F3AF Activity";
  display: block;
  font-family: "Poppins", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--secondary-color, #228);
}

body.dark-mode .activity::before {
  color: var(--primary-color, #4ad);
}

/* ---------- Document footer ---------- */
.doc-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--doc-border);
  text-align: center;
  color: var(--doc-muted);
  font-size: 0.85rem;
}

/* ---------- Images in doc pages ---------- */
main:has(.doc-header) img {
  display: block;
  max-width: min(100%, 700px);
  height: auto;
  border-radius: var(--doc-radius);
  margin: 1rem auto;
}

/* ---------- Print styles ---------- */
@media print {
  .back-link,
  header,
  .footer,
  .theme-toggle-container {
    display: none !important;
  }
  main {
    box-shadow: none !important;
    max-width: none !important;
  }
  .doc-header {
    border-color: #000;
  }
  .tip, .warning, .activity {
    border-color: #999;
    background: #f5f5f5;
  }
}