:root {
  --purple: #4b247a;
  --purple-dark: #28153f;
  --teal: #0a8c8c;
  --ink: #202029;
  --muted: #666674;
  --line: #d9d6e4;
  --bg: #f7f6fa;
  --panel: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

.topbar {
  background: var(--purple-dark);
  border-bottom: 4px solid var(--teal);
  color: white;
}

.topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 22px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  color: white;
  text-decoration: none;
}

.brand-title {
  font-size: 2rem;
  letter-spacing: 0.02em;
  font-weight: bold;
}

.brand-subtitle {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.9rem;
  color: #ddd6ee;
}

.layout {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 28px;
  padding: 24px 22px 34px;
}

.sidebar {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 10px 0;
  height: fit-content;
  font-family: Arial, Helvetica, sans-serif;
}

.sidebar a {
  display: block;
  padding: 9px 16px;
  color: var(--purple-dark);
  text-decoration: none;
  border-left: 4px solid transparent;
}

.sidebar a:hover {
  background: #f0edf7;
  border-left-color: var(--teal);
}

.content {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 26px 34px;
  min-height: 620px;
}

h1, h2, h3 {
  color: var(--purple-dark);
  line-height: 1.25;
}

h1 {
  margin-top: 0;
  font-size: 2.1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

h2 {
  margin-top: 30px;
  font-size: 1.45rem;
}

h3 { font-size: 1.1rem; }

a { color: var(--purple); }
a:hover { color: var(--teal); }

.lead {
  font-size: 1.08rem;
  color: #343442;
}

.notice, .codebox, .download-item {
  border: 1px solid var(--line);
  background: #fbfafc;
  padding: 14px 16px;
  margin: 16px 0;
}

.notice {
  border-left: 4px solid var(--teal);
}

.codebox {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  color: #222;
}

.section-list {
  list-style: none;
  padding-left: 0;
}

.section-list li {
  margin: 10px 0;
}

.section-list a {
  font-weight: bold;
}

.download-item h3 { margin-top: 0; }

.button {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--purple);
  background: var(--purple);
  color: white;
  text-decoration: none;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.92rem;
}

.button:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: white;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
}

.media-card {
  border: 1px solid var(--line);
  background: #fbfafc;
  padding: 12px;
}

.placeholder {
  aspect-ratio: 16 / 10;
  border: 1px dashed #aaa2bd;
  background: linear-gradient(135deg, #f1eef7, #e5f7f7);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.9rem;
}

.footer {
  max-width: 1120px;
  margin: 0 auto 30px;
  padding: 0 22px;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 780px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: grid; grid-template-columns: repeat(2, 1fr); }
  .content { padding: 22px; }
}
table { border-collapse: collapse; width: 100%; margin: 16px 0; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
th { background: #f0edf7; color: var(--purple-dark); }