:root{
  --bg:#f6f7f9;
  --surface:#ffffff;
  --text:#16181d;
  --muted:#6b7280;
  --line:#e6e8ec;
  --accent:#2563eb;
  --tile:#e8ebf1;
  --tile-hover:#dfe4ec;
  --radius:14px;
  --shadow:0 1px 2px rgba(15,23,42,.05), 0 6px 20px rgba(15,23,42,.06);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#0f1115;
    --surface:#171a20;
    --text:#e8eaee;
    --muted:#9aa3b2;
    --line:#262b34;
    --accent:#6395ff;
    --tile:#1e222b;
    --tile-hover:#262b36;
  }
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{margin:0;padding:0}

body{
  background:var(--bg);
  color:var(--text);
  font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}

a{color:inherit;text-decoration:none}
code{
  font:13px/1 ui-monospace,SFMono-Regular,Menlo,monospace;
  background:var(--surface);border:1px solid var(--line);
  padding:2px 6px;border-radius:6px;
}

.wrap{width:100%;max-width:960px;margin:0 auto;padding:0 20px}

/* ── ① 顶栏：会随页面滚走 ── */
.topbar{padding:18px 0 6px}

.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}

.brand{font-size:17px;font-weight:700;letter-spacing:.2px}

.account{display:flex;align-items:center;gap:10px}

.btn{
  font:inherit;font-size:14px;font-weight:500;
  height:38px;padding:0 18px;border-radius:10px;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .15s,border-color .15s,filter .15s;
}
.btn.ghost{background:var(--surface);border-color:var(--line);color:var(--text)}
.btn.ghost:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}
.btn.solid{background:var(--accent);color:#fff}
.btn.solid:hover{filter:brightness(1.08)}
.btn.block{width:100%;height:44px;margin-top:4px}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* 登录之后，右上角显示邮箱和退出 */
.who{
  display:flex;align-items:center;gap:10px;
  padding:4px 4px 4px 14px;border:1px solid var(--line);
  border-radius:999px;background:var(--surface);max-width:260px;
}
.who-mail{
  font-size:13.5px;color:var(--muted);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.who .btn{height:30px;padding:0 12px;font-size:13px}

/* ── ② 固定区：搜索栏 + 分组标签，滚动时停在顶部 ── */
.sticky{
  position:sticky;
  top:0;
  z-index:40;
  padding:16px 0 14px;
  background:color-mix(in srgb,var(--bg) 86%,transparent);
  backdrop-filter:saturate(160%) blur(12px);
  transition:box-shadow .18s,border-color .18s;
  border-bottom:1px solid transparent;
}
/* 页面滚动到下方时加一层阴影，视觉上「吸住」了 */
.sticky.stuck{
  border-bottom-color:var(--line);
  box-shadow:0 6px 18px rgba(15,23,42,.07);
}

.searchbox{
  position:relative;display:flex;align-items:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  height:52px;
  box-shadow:var(--shadow);
  transition:border-color .15s,box-shadow .15s;
}
.searchbox:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 15%,transparent);
}
.glyph{
  position:absolute;left:20px;font-size:19px;color:var(--muted);pointer-events:none;
}
.searchbox input{
  flex:1;height:100%;border:0;background:transparent;outline:none;
  padding:0 52px;font:inherit;font-size:16px;color:var(--text);
}
.searchbox input::-webkit-search-cancel-button{display:none}
.clear{
  position:absolute;right:16px;
  width:26px;height:26px;border-radius:50%;border:0;
  background:var(--line);color:var(--muted);font-size:12px;cursor:pointer;
}

/* 分组标签：一行五个 */
.tabs{
  display:grid;
  grid-template-columns:repeat(5, minmax(0, 1fr));
  gap:9px;
  margin-top:13px;
}
.tab{
  height:38px;padding:0 10px;
  font:inherit;font-size:14px;
  border:1px solid var(--line);
  border-radius:11px;
  background:var(--surface);
  color:var(--muted);
  cursor:pointer;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  transition:background .15s,border-color .15s,color .15s;
}
.tab:hover{color:var(--text);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.tab.on{
  background:var(--text);border-color:var(--text);color:var(--bg);
  font-weight:600;
}

/* ── ③ 内容区 ── */
.content{padding-top:18px;padding-bottom:80px}

.status{
  margin:0 0 14px;font-size:13px;font-weight:600;
  letter-spacing:.3px;color:var(--muted);
}

/* 一行四个入口 */
.grid{
  display:grid;
  grid-template-columns:repeat(4, minmax(0, 1fr));
  gap:10px;
}

.entry{
  display:flex;align-items:baseline;gap:9px;
  padding:15px 16px;
  background:var(--tile);
  border-radius:12px;
  min-width:0;
  transition:background .15s,transform .15s;
}
.entry:hover{background:var(--tile-hover);transform:translateY(-1px)}
.entry .nm{
  font-weight:600;font-size:14px;
  flex:0 0 auto;max-width:55%;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.entry .u{
  color:var(--muted);font-size:12.5px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  flex:1 1 auto;min-width:0;
}

.nothing{
  text-align:center;padding:56px 20px;
  color:var(--muted);font-size:14.5px;margin:0;
}

.hint{
  text-align:center;padding:70px 24px;
  background:var(--surface);border:1px dashed var(--line);border-radius:18px;margin:0;
}
.hint-icon{font-size:34px;margin-bottom:14px}
.hint h2{margin:0 0 8px;font-size:17px}
.hint p{margin:0;color:var(--muted);font-size:14px}

mark{background:color-mix(in srgb,#f59e0b 34%,transparent);color:inherit;border-radius:3px}

/* ── ④ 弹窗 ── */
.backdrop{
  position:fixed;inset:0;z-index:60;
  background:rgba(12,14,18,.5);
  backdrop-filter:blur(3px);
  display:grid;place-items:center;padding:20px;
}
.modal{
  position:relative;width:100%;max-width:390px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:18px;padding:28px 26px 22px;
  box-shadow:0 24px 60px rgba(0,0,0,.28);
}
.modal-close{
  position:absolute;top:13px;right:13px;
  width:30px;height:30px;border-radius:9px;border:0;
  background:transparent;color:var(--muted);cursor:pointer;font-size:13px;
}
.modal-close:hover{background:var(--bg)}
.modal-title{margin:0 0 5px;font-size:20px}
.modal-sub{margin:0 0 20px;font-size:13.5px;color:var(--muted)}

.form{display:flex;flex-direction:column;gap:15px}
.field{display:flex;flex-direction:column;gap:7px}
.field span{font-size:13px;font-weight:600;color:var(--muted)}
.field input{
  height:44px;padding:0 14px;font:inherit;color:var(--text);
  background:var(--bg);border:1px solid var(--line);
  border-radius:11px;outline:none;
  transition:border-color .15s,box-shadow .15s;
}
.field input:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 15%,transparent);
}
.msg{margin:0;font-size:13px;padding:10px 12px;border-radius:10px}
.msg.err{background:color-mix(in srgb,#ef4444 14%,transparent);color:#dc2626}
.msg.ok{background:color-mix(in srgb,#10b981 16%,transparent);color:#059669}
@media (prefers-color-scheme: dark){
  .msg.err{color:#fca5a5}
  .msg.ok{color:#6ee7b7}
}

.modal-foot{
  display:flex;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
}
.link{border:0;background:transparent;padding:0;cursor:pointer;font:inherit;font-size:13px;color:var(--muted)}
.link:hover{color:var(--accent)}

.toast{
  position:fixed;left:50%;bottom:30px;transform:translateX(-50%);
  z-index:80;max-width:calc(100% - 40px);
  background:var(--text);color:var(--bg);
  padding:12px 20px;border-radius:11px;font-size:14px;
  box-shadow:0 12px 32px rgba(0,0,0,.3);
}

/* ── 窄屏 ── */
@media (max-width:600px){
  .wrap{padding:0 15px}
  .topbar{padding-top:14px}
  .brand{font-size:15.5px}
  .btn{height:36px;padding:0 15px;font-size:13.5px}
  .searchbox{height:48px}
  .searchbox input{padding:0 46px;font-size:15.5px}
  .glyph{left:17px;font-size:17px}
  .tabs{grid-template-columns:repeat(3, minmax(0,1fr));gap:7px}
  .grid{grid-template-columns:repeat(2, minmax(0,1fr));gap:8px}
  .entry{padding:13px 13px;gap:7px}
  .hint{padding:52px 18px}
}

/* 平板：一行三个，标签一行四个 */
@media (min-width:601px) and (max-width:900px){
  .grid{grid-template-columns:repeat(3, minmax(0,1fr))}
  .tabs{grid-template-columns:repeat(5, minmax(0,1fr))}
}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important}
}