:root {
  --fg: #1f2430;
  --card: rgba(255, 255, 255, 0.78);
  --card-hover: rgba(255, 255, 255, 0.95);
  --accent: #4f6ef7;
  --accent-soft: #e8edff;
  --border: rgba(0, 0, 0, 0.08);
  --radius: 14px;
  --shadow: 0 8px 30px rgba(20, 30, 60, 0.12);
  --sidebar-w: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--fg);
  overflow: hidden;
}

/* ---- 壁纸与遮罩 ---- */
#wallpaper {
  position: fixed; inset: 0;
  background: url("https://images.unsplash.com/photo-1506905925346-21b146de94e7?w=1920&q=80") center/cover no-repeat;
  z-index: 0;
}
#overlay {
  position: fixed; inset: 0;
  background: #ffffff;
  opacity: 0.35;
  z-index: 1;
  pointer-events: none;
}

/* ---- 顶部栏 ---- */
.topbar {
  position: relative; z-index: 5;
  display: flex; align-items: center; gap: 12px;
  padding: 14px 20px;
  margin: 12px 16px 0;
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.topbar-title {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
  user-select: none;
}
.search-box {
  flex: 1;
  display: flex; align-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  max-width: 560px;
}
.search-box input {
  flex: 1;
  border: none; outline: none;
  padding: 10px 12px;
  font-size: 14px;
  background: transparent;
}
.icon-btn {
  border: none; background: transparent;
  font-size: 18px; cursor: pointer;
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px;
  color: var(--fg);
  transition: background 0.15s;
}
.icon-btn:hover { background: var(--accent-soft); }
.topbar-actions { display: flex; gap: 8px; margin-left: auto; }

.ghost-btn {
  border: 1px solid var(--border);
  background: #fff;
  padding: 8px 12px;
  border-radius: 9px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--fg);
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent); }
.ghost-btn.danger { color: #e05656; }
.ghost-btn.danger:hover { border-color: #e05656; background: #fdecec; }
.primary-btn {
  border: none;
  background: var(--accent);
  color: #fff;
  padding: 8px 18px;
  border-radius: 9px;
  font-size: 13px;
  cursor: pointer;
  transition: filter 0.15s;
}
.primary-btn:hover { filter: brightness(1.08); }

/* ---- 布局 ---- */
.layout {
  position: relative; z-index: 4;
  display: flex;
  height: calc(100% - 76px);
  margin: 12px 16px 16px;
}

/* ---- 侧边栏 ---- */
.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 auto;
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 12px;
  display: flex; flex-direction: column; gap: 18px;
  transition: margin-left 0.25s ease, opacity 0.2s ease;
  overflow-y: auto;
}
.sidebar.collapsed {
  margin-left: calc(-1 * var(--sidebar-w) - 16px);
  opacity: 0;
  pointer-events: none;
}
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; font-weight: 600;
  color: #6b7280;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.mini-btn {
  border: 1px solid var(--border);
  background: #fff;
  width: 22px; height: 22px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  color: var(--accent);
}
.mini-btn:hover { background: var(--accent-soft); }

#catList { list-style: none; }
#catList li {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  user-select: none;
}
#catList li:hover { background: rgba(0,0,0,0.04); }
#catList li.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
#catList li .cat-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#catList li .cat-count { font-size: 12px; color: #9aa1ad; }
#catList li .cat-edit {
  border: none; background: transparent; cursor: pointer;
  font-size: 12px; opacity: 0; color: #9aa1ad;
}
#catList li:hover .cat-edit { opacity: 1; }
#catList li .cat-edit:hover { color: #e05656; }

.field-label {
  display: block;
  font-size: 12px; color: #6b7280;
  margin: 8px 0 4px;
}
.sidebar input[type="text"], .modal input[type="text"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
  background: #fff;
}
.sidebar input[type="text"]:focus, .modal input[type="text"]:focus { border-color: var(--accent); }
.sidebar input[type="range"] { width: 100%; accent-color: var(--accent); }
.btn-row { display: flex; gap: 6px; margin-top: 10px; }
.btn-row .ghost-btn { flex: 1; text-align: center; font-size: 12px; padding: 6px 8px; }
.upload-btn { display: inline-block; }

.sidebar-foot { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border); display: flex; gap: 8px; }
.sidebar-foot .ghost-btn { flex: 1; text-align: center; font-size: 12px; }

/* ---- 主内容 ---- */
.main {
  flex: 1;
  margin-left: 12px;
  overflow-y: auto;
  padding: 6px 4px 20px;
}

.empty-tip {
  text-align: center;
  color: #8a91a0;
  margin-top: 60px;
  font-size: 15px;
}

/* 搜索无结果 */
.no-result {
  text-align: center;
  color: #8a91a0;
  margin-top: 40px;
}

/* ---- 网站卡片网格 ---- */
.site-group { margin-bottom: 22px; }
.group-title {
  font-size: 14px; font-weight: 700;
  color: #4a5160;
  margin: 0 6px 10px;
  display: flex; align-items: center; gap: 8px;
}
.group-title .count { font-weight: 400; font-size: 12px; color: #9aa1ad; }
.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 12px;
}
.site-card {
  position: relative;
  background: var(--card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 10px 12px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  cursor: pointer;
  text-decoration: none;
  color: var(--fg);
  transition: transform 0.15s ease, background 0.15s ease;
}
.site-card:hover { transform: translateY(-3px); background: var(--card-hover); }
.site-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  background: #fff;
  border: 1px solid var(--border);
  overflow: hidden;
}
.site-icon img { width: 100%; height: 100%; object-fit: cover; }
.site-name {
  font-size: 13px; font-weight: 600;
  max-width: 100%;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.site-url {
  font-size: 11px; color: #9aa1ad;
  max-width: 100%;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.site-actions {
  position: absolute; top: 6px; right: 6px;
  display: none; gap: 2px;
}
.site-card:hover .site-actions { display: flex; }
.site-actions button {
  border: none; background: rgba(255,255,255,0.9);
  width: 24px; height: 24px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}
.site-actions button:hover { background: var(--accent-soft); }
.site-actions button.del:hover { background: #fdecec; color: #e05656; }

/* ---- 弹窗 ---- */
.modal {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(3px);
  display: flex; align-items: center; justify-content: center;
}
.modal[hidden] { display: none; }
.modal-card {
  width: min(440px, 92vw);
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
  padding: 22px;
  animation: pop 0.18s ease;
}
.modal-card.small { width: min(320px, 92vw); }
@keyframes pop {
  from { transform: scale(0.95); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
.modal-card h3 { font-size: 16px; margin-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 4px; }
.modal select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  background: #fff;
  outline: none;
}
.req { color: #e05656; }
.modal-actions {
  display: flex; gap: 8px; align-items: center;
  margin-top: 18px;
}
.spacer { flex: 1; }

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.18); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---- 移动端 ---- */
@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; }
  .search-box { order: 3; max-width: 100%; flex-basis: 100%; }
  .sidebar { position: fixed; left: 16px; top: 84px; bottom: 16px; z-index: 50; }
  .main { margin-left: 12px; }
  .site-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}