/* ===== 设计 token ===== */
:root{
  --bg:#F4F2ED;
  --surface:#FFFFFF;
  --surface-2:#EDEBE4;
  --surface-3:#E3E0D6;
  --border:#E2DFD6;
  --border-strong:#C9C5B8;
  --text:#1A1A1A;
  --text-2:#5C5C58;
  --text-3:#8E8E88;
  --accent:#0E7C6B;
  --accent-strong:#0A5F52;
  --accent-soft:#E3F0EC;
  --danger:#C0453A;
  --shadow:0 1px 2px rgba(20,20,15,.04), 0 4px 16px rgba(20,20,15,.04);
  --shadow-hover:0 2px 4px rgba(20,20,15,.06), 0 12px 28px rgba(20,20,15,.08);
  --radius:10px;
  --radius-sm:6px;
  --sidebar-w:232px;
  --sidebar-rail:56px;
  --topbar-h:64px;
}
[data-theme="dark"]{
  --bg:#14161B;
  --surface:#1C1F26;
  --surface-2:#242832;
  --surface-3:#2D323D;
  --border:#2A2E38;
  --border-strong:#3A404D;
  --text:#E8E9EC;
  --text-2:#A6ABB6;
  --text-3:#6E7380;
  --accent:#2DD4BF;
  --accent-strong:#5EEAD4;
  --accent-soft:rgba(45,212,191,.12);
  --danger:#F87171;
  --shadow:0 1px 2px rgba(0,0,0,.3);
  --shadow-hover:0 4px 16px rgba(0,0,0,.4);
}

/* ===== 基础 ===== */
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"Space Grotesk","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:14px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  transition:background .25s ease,color .25s ease;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit;font-size:inherit;color:inherit}
::selection{background:var(--accent-soft)}

/* ===== 布局 ===== */
.app{
  display:grid;
  grid-template-columns:var(--sidebar-w) 1fr;
  grid-template-rows:var(--topbar-h) 1fr;
  grid-template-areas:"brand topbar" "sidebar main";
  min-height:100vh;
  transition:grid-template-columns .22s ease;
}
/* 侧边栏收缩态（桌面端）：整列收成一条窄栏 */
.app.sb-collapsed{
  grid-template-columns:var(--sidebar-rail) 1fr;
}
.brand{
  grid-area:brand;
  display:flex;align-items:center;gap:10px;
  padding:0 20px;
  border-bottom:1px solid var(--border);
  border-right:1px solid var(--border);
}
.brand-mark{
  width:28px;height:28px;border-radius:7px;
  background:var(--accent);
  display:grid;place-items:center;
  color:#fff;flex-shrink:0;
}
.brand-mark svg{width:16px;height:16px}
.brand-name{font-weight:700;font-size:15px;letter-spacing:-.01em}
.brand-name small{display:block;font-weight:500;font-size:11px;color:var(--text-3);letter-spacing:.02em}

/* ===== 顶栏 ===== */
.topbar{
  grid-area:topbar;
  display:flex;align-items:center;gap:12px;
  padding:0 24px;
  border-bottom:1px solid var(--border);
}
.search{
  flex:1;max-width:560px;
  display:flex;align-items:center;gap:10px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:999px;
  padding:8px 16px;
  transition:border-color .15s, box-shadow .15s;
}
.search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.search svg{width:16px;height:16px;color:var(--text-3);flex-shrink:0}
.search input{
  flex:1;border:none;outline:none;background:transparent;
  font-size:14px;
}
.search kbd{
  font-family:"JetBrains Mono",monospace;font-size:11px;
  color:var(--text-3);background:var(--surface-2);
  padding:2px 6px;border-radius:4px;
  border:1px solid var(--border);
}
.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-btn{
  width:36px;height:36px;border-radius:8px;
  display:grid;place-items:center;
  color:var(--text-2);
  transition:background .15s,color .15s;
}
.icon-btn:hover{background:var(--surface-2);color:var(--text)}
.icon-btn svg{width:18px;height:18px}
.btn-primary{
  display:flex;align-items:center;gap:6px;
  background:var(--text);color:var(--bg);
  padding:9px 16px;border-radius:8px;
  font-weight:600;font-size:13px;
  transition:opacity .15s, transform .1s;
}
.btn-primary:hover{opacity:.88}
.btn-primary:active{transform:scale(.98)}
.btn-primary svg{width:15px;height:15px}

/* ===== 侧边栏 ===== */
.sidebar{
  grid-area:sidebar;
  padding:16px 12px;
  border-right:1px solid var(--border);
  overflow-y:auto;
  transition:padding .22s ease;
}
/* ---- 收缩态 ---- */
.app.sb-collapsed .sidebar{
  padding:12px 8px;
  overflow:hidden;
}
/* ⚠️ 不能整块隐藏 .sidebar-section —— #catList 就在它里面，
   藏掉会把分类圆点一起藏没，收缩后侧栏变成纯空白。
   只隐藏「标签」区块的文字标题与标签云本身。 */
.app.sb-collapsed .sidebar-title,
.app.sb-collapsed .tag-cloud{display:none}
.app.sb-collapsed .sidebar-section{margin-bottom:0}
/* 收缩后只留分类圆点，纵向居中排成一列 */
.app.sb-collapsed .cat-list{display:flex;flex-direction:column;align-items:center;gap:8px}
.app.sb-collapsed .cat-item{
  justify-content:center;padding:7px 0;width:100%;
  border-radius:var(--radius-sm);
}
.app.sb-collapsed .cat-item span:nth-child(2),
.app.sb-collapsed .cat-count{display:none}
.app.sb-collapsed .cat-dot{width:10px;height:10px;flex-shrink:0}
/* 收缩态圆点保留 hover 提示（用原生 title 属性） */
.app.sb-collapsed .brand-name{display:none}
.app.sb-collapsed .brand{justify-content:center;padding:0}

/* ---- 侧边栏收缩/展开按钮 ---- */
.sb-toggle{
  width:32px;height:32px;border-radius:8px;
  display:grid;place-items:center;
  color:var(--text-3);
  transition:background .15s,color .15s;
  flex-shrink:0;
}
.sb-toggle:hover{background:var(--surface-2);color:var(--text)}
.sb-toggle svg{width:18px;height:18px;transition:transform .22s ease}
.app.sb-collapsed .sb-toggle svg{transform:rotate(180deg)}
/* 收缩态下侧栏顶部用来放展开按钮 */
.sb-expand{
  display:none;width:100%;height:32px;border-radius:8px;
  place-items:center;color:var(--text-3);margin-bottom:14px;
  transition:background .15s,color .15s;
}
.app.sb-collapsed .sb-expand{display:grid}
.sb-expand:hover{background:var(--surface-2);color:var(--text)}
.sb-expand svg{width:18px;height:18px}
.sidebar-section{margin-bottom:20px}
.sidebar-title{
  font-size:11px;font-weight:600;
  color:var(--text-3);
  text-transform:uppercase;letter-spacing:.08em;
  padding:0 10px 8px;
}
.cat-list{display:flex;flex-direction:column;gap:1px}
.cat-item{
  display:flex;align-items:center;gap:10px;
  padding:8px 10px;border-radius:var(--radius-sm);
  color:var(--text-2);font-size:13.5px;font-weight:500;
  cursor:pointer;user-select:none;
  transition:background .12s,color .12s;
}
.cat-item:hover{background:var(--surface-2);color:var(--text)}
.cat-item.active{background:var(--accent-soft);color:var(--accent-strong)}
[data-theme="dark"] .cat-item.active{color:var(--accent)}
.cat-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.cat-count{
  margin-left:auto;font-size:11px;font-weight:500;
  color:var(--text-3);font-family:"JetBrains Mono",monospace;
}
.tag-cloud{padding:0 8px;display:flex;flex-wrap:wrap;gap:6px}
.tag-chip{
  font-size:11.5px;padding:3px 10px;border-radius:999px;
  background:var(--surface-2);color:var(--text-2);
  cursor:pointer;transition:all .12s;
  border:1px solid transparent;
}
.tag-chip:hover{color:var(--text);border-color:var(--border)}
.tag-chip.active{background:var(--text);color:var(--bg);border-color:var(--text)}

/* ===== 主区 ===== */
.main{
  grid-area:main;
  padding:24px 28px 48px;
  overflow-y:auto;
}
.main-header{
  display:flex;align-items:flex-end;justify-content:space-between;
  margin-bottom:20px;gap:16px;flex-wrap:wrap;
}
.main-title{font-size:22px;font-weight:700;letter-spacing:-.01em}
.main-sub{font-size:13px;color:var(--text-2);margin-top:4px}
.active-filters{
  display:flex;align-items:center;gap:6px;flex-wrap:wrap;
  font-size:12.5px;color:var(--text-2);
}
.filter-pill{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent-soft);color:var(--accent-strong);
  padding:4px 10px;border-radius:999px;font-weight:500;
}
[data-theme="dark"] .filter-pill{color:var(--accent)}
.filter-pill button{display:grid;place-items:center;color:inherit;opacity:.7}
.filter-pill button:hover{opacity:1}
.filter-pill svg{width:12px;height:12px}

/* ===== 书签网格 ===== */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:12px;
}
.card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:14px;
  display:flex;flex-direction:column;gap:10px;
  transition:border-color .15s, box-shadow .15s, transform .15s;
  cursor:pointer;
}
.card:hover{
  border-color:var(--border-strong);
  box-shadow:var(--shadow-hover);
  transform:translateY(-1px);
}
.card-top{display:flex;align-items:center;gap:10px}
.favicon{
  position:relative;
  width:28px;height:28px;border-radius:6px;
  display:grid;place-items:center;flex-shrink:0;
  overflow:hidden;
}
.favicon-bg{
  position:absolute;inset:0;
  display:grid;place-items:center;
  font-size:13px;font-weight:700;color:#fff;
  letter-spacing:-.02em;
}
.favicon img{
  position:relative;z-index:1;
  width:18px;height:18px;object-fit:contain;
  background:#fff;border-radius:4px;
}
.card-title{
  font-weight:600;font-size:14px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.card-url{
  font-family:"JetBrains Mono",monospace;
  font-size:11.5px;color:var(--text-3);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.card-tags{display:flex;flex-wrap:wrap;gap:4px;margin-top:2px}
.card-tag{
  font-size:10.5px;color:var(--text-2);
  background:var(--surface-2);
  padding:2px 7px;border-radius:4px;
}
.card-actions{
  position:absolute;top:8px;right:8px;
  display:flex;gap:2px;
  opacity:0;transition:opacity .15s;
}
.card:hover .card-actions{opacity:1}
.card-actions button{
  width:24px;height:24px;border-radius:5px;
  display:grid;place-items:center;
  color:var(--text-3);background:var(--surface);
  border:1px solid var(--border);
}
.card-actions button:hover{color:var(--danger);border-color:var(--danger)}
/* 编辑按钮：hover 走强调色，不用 danger 红 */
.card-actions .edit-btn:hover{color:var(--accent);border-color:var(--accent)}
.card-actions svg{width:13px;height:13px}

/* ===== 编辑弹窗 ===== */
.modal-head-edit{
  font-size:16px;font-weight:700;margin-bottom:14px;
  letter-spacing:-.01em;
}
/* 编辑弹窗里「当前标签」可点掉 */
.edit-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.edit-tag{
  display:inline-flex;align-items:center;gap:5px;
  font-size:11.5px;padding:3px 8px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-strong);
  border:1px solid transparent;
}
[data-theme="dark"] .edit-tag{color:var(--accent)}
.edit-tag button{
  display:grid;place-items:center;width:14px;height:14px;
  border-radius:50%;color:inherit;opacity:.7;
}
.edit-tag button:hover{opacity:1}
.edit-tag svg{width:9px;height:9px}
.edit-hint{font-size:11px;color:var(--text-3);margin-top:6px}

/* ===== 分类多选 chips（编辑弹窗） ===== */
.type-chips{
  display:flex;flex-wrap:wrap;gap:6px;
  margin-top:2px;
}
.type-chip{
  padding:5px 11px;border-radius:999px;
  font-size:12px;font-weight:500;
  background:var(--surface-2);color:var(--text-2);
  border:1px solid var(--border);
  transition:background .15s,color .15s,border-color .15s;
}
.type-chip:hover{border-color:var(--text-3)}
.type-chip.on{
  background:var(--accent-soft);color:var(--accent-strong);
  border-color:var(--accent);
}
[data-theme="dark"] .type-chip.on{color:var(--accent)}
/* 新建分类输入行 */
.cat-new-row{display:flex;gap:8px;margin-top:8px}
.cat-new-row input{
  flex:1;min-width:0;
  padding:7px 11px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:var(--surface);
  font-size:13px;
}
.cat-new-row input:focus{outline:none;border-color:var(--accent)}
.cat-new-row .btn-ghost{
  flex-shrink:0;padding:7px 13px;font-size:12.5px;
}

/* ===== 语言切换按钮 ===== */
.lang-toggle{
  font-size:12px;font-weight:700;
  letter-spacing:.02em;
  min-width:32px;
}
.lang-toggle:hover{background:var(--surface-2)}

/* 空态 */
.empty{
  text-align:center;padding:80px 20px;
  color:var(--text-3);
}
.empty-icon{
  width:56px;height:56px;margin:0 auto 16px;
  border-radius:14px;background:var(--surface-2);
  display:grid;place-items:center;
}
.empty-icon svg{width:26px;height:26px}
.empty h3{font-size:16px;color:var(--text-2);margin-bottom:6px;font-weight:600}
.empty p{font-size:13px}

/* ===== 弹窗 ===== */
.modal-mask{
  position:fixed;inset:0;
  background:rgba(15,15,15,.45);
  backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;
  z-index:100;padding:20px;
}
.modal-mask.show{display:flex}
.modal{
  background:var(--surface);
  border-radius:14px;
  width:100%;max-width:480px;
  padding:24px;
  box-shadow:0 20px 60px rgba(0,0,0,.2);
}
.modal h2{font-size:17px;font-weight:700;margin-bottom:18px}
.form-group{margin-bottom:14px}
.form-group label{
  display:block;font-size:12px;font-weight:600;
  color:var(--text-2);margin-bottom:6px;
}
.form-group input,.form-group select{
  width:100%;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:8px;
  padding:9px 12px;
  outline:none;
  transition:border-color .15s, box-shadow .15s;
}
.form-group input:focus,.form-group select:focus{
  border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.modal-footer{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}
.btn-ghost{
  padding:9px 16px;border-radius:8px;font-weight:500;
  color:var(--text-2);
}
.btn-ghost:hover{background:var(--surface-2)}

/* toast */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--text);color:var(--bg);
  padding:10px 18px;border-radius:8px;
  font-size:13px;font-weight:500;
  opacity:0;pointer-events:none;
  transition:opacity .2s, transform .2s;
  z-index:200;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== 移动端 ===== */
.menu-toggle{display:none}
@media (max-width:860px){
  :root{--sidebar-w:0px;--topbar-h:56px}
  body{font-size:15px}
  input,select,.search input{font-size:16px !important}
  .app{
    grid-template-columns:1fr;
    grid-template-areas:"topbar" "main";
  }
  .brand{display:none}
  .menu-toggle{display:grid}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;
    width:280px;max-width:85vw;
    background:var(--surface);
    z-index:90;
    transform:translateX(-100%);
    transition:transform .25s ease;
    padding-top:20px;
    box-shadow:2px 0 20px rgba(0,0,0,.1);
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar-backdrop{
    position:fixed;inset:0;background:rgba(0,0,0,.4);
    z-index:80;display:none;
  }
  .sidebar-backdrop.show{display:block}
  .main{padding:16px 16px 100px}
  .main-title{font-size:19px}
  .grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .card{padding:12px}
  .search kbd{display:none}
  .btn-label{display:none}
  .search{padding:7px 14px}
  /* 移动端分类横向条 */
  .mobile-cats{
    display:flex;gap:8px;overflow-x:auto;
    padding:4px 0 16px;
    margin:0 -16px;
    padding-left:16px;padding-right:16px;
    scrollbar-width:none;
  }
  .mobile-cats::-webkit-scrollbar{display:none}
  .mobile-cat{
    flex-shrink:0;
    padding:6px 14px;border-radius:999px;
    background:var(--surface);border:1px solid var(--border);
    font-size:13px;color:var(--text-2);font-weight:500;
    white-space:nowrap;
  }
  .mobile-cat.active{background:var(--text);color:var(--bg);border-color:var(--text)}
}
@media (min-width:861px){
  .mobile-cats{display:none}
}

/* 深色模式 favicon 适配 */
[data-theme="dark"] .favicon{background:#fff}