:root {
  --fb-bg-url: url('/fb-wallpaper/frappe.webp?v=20260306w');
  --fb-accent: #8caaee;
  --fb-accent-2: #ca9ee6;
  --fb-text: #c6d0f5;
  --fb-subtext: #a5adce;
  --fb-base: #303446;
  --fb-mantle: #292c3c;
  --fb-crust: #232634;
  --fb-surface: rgba(48, 52, 70, 0.78);
  --fb-surface-strong: rgba(41, 44, 60, 0.92);
  --fb-border: rgba(198, 208, 245, 0.20);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  color: var(--fb-text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.bg {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--fb-accent-2) 28%, transparent), transparent 45%),
    radial-gradient(circle at 80% 15%, color-mix(in srgb, var(--fb-accent) 24%, transparent), transparent 40%),
    var(--fb-bg-url) center/cover no-repeat;
  opacity: 0.36;
  z-index: 0;
}

.overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, color-mix(in srgb, var(--fb-crust) 82%, transparent), color-mix(in srgb, var(--fb-crust) 92%, transparent));
  z-index: 0;
}

.topbar, .layout {
  position: relative;
  z-index: 1;
}

.topbar {
  height: 68px;
  display: grid;
  grid-template-columns: 220px 1fr 120px;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--fb-border);
  background: var(--fb-surface-strong);
  backdrop-filter: blur(10px);
}

.brand {
  font-size: 16px;
  font-weight: 700;
}

.search-form {
  display: flex;
  gap: 8px;
}

.search-form input {
  flex: 1;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--fb-border);
  background: color-mix(in srgb, var(--fb-base) 72%, transparent);
  color: var(--fb-text);
  padding: 0 12px;
  outline: none;
}

.search-form button,
.back-link {
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--fb-border);
  padding: 0 14px;
  color: var(--fb-text);
  background: color-mix(in srgb, var(--fb-base) 72%, transparent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.search-form button:hover,
.back-link:hover {
  background: color-mix(in srgb, var(--fb-accent) 20%, transparent);
}

.layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 14px;
  padding: 14px;
  height: calc(100% - 68px);
}

.left-panel,
.right-panel {
  border: 1px solid var(--fb-border);
  border-radius: 12px;
  background: var(--fb-surface);
  backdrop-filter: blur(8px);
  overflow: hidden;
  min-height: 0;
}

.panel-title {
  height: 46px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-bottom: 1px solid var(--fb-border);
  font-size: 14px;
  font-weight: 700;
}

.hint {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--fb-subtext);
}

.tree,
.results {
  height: calc(100% - 78px);
  overflow: auto;
  padding: 0 8px 10px;
}

.tree ul {
  list-style: none;
  margin: 0;
  padding: 0 0 0 14px;
}

.tree-row {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  border-radius: 8px;
  padding: 0 8px;
  cursor: pointer;
}

.tree-row:hover { background: color-mix(in srgb, var(--fb-accent) 16%, transparent); }

.tree-toggle {
  width: 16px;
  text-align: center;
  color: var(--fb-subtext);
  font-size: 11px;
}

.tree-icon { width: 16px; text-align: center; }

.tree-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-item {
  margin: 8px 8px 0;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--fb-border);
  background: color-mix(in srgb, var(--fb-base) 56%, transparent);
}

.result-item a {
  color: var(--fb-accent);
  text-decoration: none;
}

.result-item a:hover { color: var(--fb-accent-2); text-decoration: underline; }

.result-path {
  margin-top: 4px;
  font-size: 12px;
  color: var(--fb-subtext);
  word-break: break-all;
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr;
    height: auto;
  }
  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }
  .left-panel, .right-panel {
    min-height: 320px;
  }
}