/* 햄버거 드로어 사이드바 + 문서 검색 */

.drawer-scrim {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 16, .42);
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s var(--ease);
  z-index: 60;
}
.drawer-scrim.open { opacity: 1; pointer-events: auto; }

.drawer {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: min(330px, 88vw);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  transform: translateX(-102%);
  transition: transform .2s var(--ease);
  z-index: 61;
  display: flex;
  flex-direction: column;
}
.drawer.open { transform: translateX(0); }

.drawer-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.drawer-head strong { font-size: .95rem; letter-spacing: -0.02em; }

.drawer-search { padding: 12px 16px 10px; }
.drawer-search input {
  width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--fg);
  font: inherit;
  font-size: .9rem;
}
.drawer-search input::placeholder { color: var(--fg-subtle); }
.drawer-search input:focus { border-color: var(--accent); background: var(--bg-elevated); }

.drawer-body {
  overflow-y: auto;
  padding: 0 10px 22px;
  flex: 1 1 auto;
}

.nav-group { margin: 4px 0 8px; }
.nav-group > button {
  width: 100%;
  display: flex; align-items: center; gap: 8px;
  background: none;
  border: 0;
  color: var(--fg-muted);
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 8px 8px;
  cursor: pointer;
  border-radius: 8px;
}
.nav-group > button:hover { background: var(--bg-subtle); color: var(--fg); }
.nav-group > button .chev { transition: transform .15s var(--ease); font-size: .7rem; }
.nav-group.collapsed > button .chev { transform: rotate(-90deg); }
.nav-group.collapsed .nav-items { display: none; }

.nav-items { display: block; }
.nav-item {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--fg);
  font-size: .89rem;
  line-height: 1.45;
}
.nav-item:hover { background: var(--accent-soft-bg); color: var(--accent-soft-fg); text-decoration: none; }
.nav-item small { display: block; color: var(--fg-subtle); font-size: .76rem; }
.nav-item:hover small { color: var(--accent-soft-fg); opacity: .8; }

.nav-empty {
  padding: 18px 12px;
  color: var(--fg-subtle);
  font-size: .87rem;
}

@media (min-width: 1280px) {
  /* 넓은 화면에서도 드로어는 오버레이로 유지합니다. 본문 폭을 흔들지 않기 위해서입니다. */
}