/* MCP 사용 가이드 — split rail + code pane */

.gd-shell {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 24px;
}

/* Left rail */
.gd-rail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.gd-rail-item {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  text-align: left;
  border-radius: var(--r-md);
  position: relative;
  transition: background 160ms ease;
  border: 1px solid transparent;
}
.gd-rail-item:hover { background: var(--bg-card); }
.gd-rail-item[data-active="true"] {
  background: var(--bg-card);
  border-color: var(--line-strong);
}
.gd-rail-item[data-active="true"]::before {
  content: "";
  position: absolute;
  left: -1px; top: 16px; bottom: 16px;
  width: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.gd-rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  padding-top: 4px;
}
.gd-rail-item[data-active="true"] .gd-rail-num { color: var(--accent); }
.gd-rail-text { display: flex; flex-direction: column; gap: 4px; }
.gd-rail-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.gd-rail-title {
  font-size: 15px;
  color: var(--ink-2);
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.gd-rail-item[data-active="true"] .gd-rail-title { color: var(--ink); font-weight: 500; }
.gd-rail-time {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink-4);
  padding-top: 4px;
}
.gd-rail-cta {
  margin-top: 8px;
  padding: 14px 18px;
  font-size: 13.5px;
  color: var(--ink-2);
  border-top: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 160ms ease, gap 160ms ease;
}
.gd-rail-cta:hover { color: var(--ink); gap: 10px; }

/* Right pane */
.gd-pane {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.gd-pane-head { max-width: 580px; }
.gd-pane-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.gd-pane-head h3 {
  font-size: 28px;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.gd-pane-head p {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.6;
  margin: 0;
}

/* Code block */
.gd-code {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.gd-code-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--line);
}
.gd-code-lang {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.gd-code-body {
  padding: 20px 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  min-height: 220px;
}
.gd-code-line {
  display: flex;
  gap: 14px;
  color: var(--ink-2);
}
.gd-code-prefix {
  flex-shrink: 0;
  width: 18px;
  text-align: right;
  user-select: none;
}
.prefix-cmd { color: var(--accent); }
.prefix-out { color: #4ADE80; }
.prefix-com { color: var(--ink-4); }
.prefix-lang { color: var(--ink-4); }
.gd-code-comment { color: var(--ink-4); }
.gd-code-output { color: #4ADE80; }
.gd-code-body .key { color: #82AAFF; }
.gd-code-body .str { color: #C3E88D; }
.gd-code-body .kw { color: #C792EA; }
.gd-code-body .fn { color: #82AAFF; }
.gd-code-body .const { color: #F78C6C; }
.gd-code-body .pun { color: var(--ink-3); }

.gd-pane-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 4px;
}

@media (max-width: 980px) {
  .gd-shell { grid-template-columns: 1fr; padding: 16px; }
  .gd-pane { padding: 24px; }
  .gd-pane-head h3 { font-size: 24px; }
}