/* Cursus — phone-first, system fonts only (no third-party hosts: works in WeChat and on school Wi-Fi). */
:root{
  --bg:#F3F4F2; --panel:#fff; --ink:#1E2226; --muted:#5B6470; --hair:#D5D9D6;
  --accent:#2F7A66; --accent-soft:#E3EFEA; --warn:#A33A2E; --warn-soft:#F4E4E1; --gold:#8A6B1F;
}
/* Theme: light unless the user chooses otherwise. The system's dark setting applies only with data-theme="system";
   an explicit data-theme="dark" applies always. The codebook colours have a dark-ground set. */
:root{ --fg:var(--ink); --fg-soft:var(--muted); --card:var(--panel);
  --cb-verb:#c0212a; --cb-subj-bg:#111; --cb-subj-fg:#fff; --cb-inf:#00843d; --cb-part:#d17a00; --cb-conn:#f3d645aa; --cb-subject:#7030a0; --cb-phrase:#e9e3d0; --cb-line:#b9b9b9; color-scheme:light }
html[data-theme="dark"]{ --bg:#15181B; --panel:#1C2024; --ink:#E6E8E4; --muted:#9AA3AA; --hair:#2C3236;
  --accent:#5FB39A; --accent-soft:#1F332D; --warn:#E07160; --warn-soft:#3A2521; --gold:#D3B25C;
  --cb-verb:#ff6b6b; --cb-subj-bg:#ece7da; --cb-subj-fg:#15181B; --cb-inf:#5fd08a; --cb-part:#ffb04d; --cb-conn:#c9b021aa; --cb-subject:#c99cf0; --cb-phrase:#4a4028; --cb-line:#777; color-scheme:dark }
@media (prefers-color-scheme:dark){
  html[data-theme="system"]{ --bg:#15181B; --panel:#1C2024; --ink:#E6E8E4; --muted:#9AA3AA; --hair:#2C3236;
    --accent:#5FB39A; --accent-soft:#1F332D; --warn:#E07160; --warn-soft:#3A2521; --gold:#D3B25C;
    --cb-verb:#ff6b6b; --cb-subj-bg:#ece7da; --cb-subj-fg:#15181B; --cb-inf:#5fd08a; --cb-part:#ffb04d; --cb-conn:#c9b021aa; --cb-subject:#c99cf0; --cb-phrase:#4a4028; --cb-line:#777; color-scheme:dark }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.5 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif}
main{max-width:640px;margin:0 auto;padding:1.2rem clamp(.6rem,2vw,1.4rem) 4rem;box-sizing:border-box;width:100%}
body{overflow-x:hidden}
body.wide main{max-width:min(1440px,100%)}
*,*::before,*::after{box-sizing:border-box}
img,svg,video{max-width:100%;height:auto}
h1{font-size:1.6rem;margin:.2rem 0 .6rem;font-weight:600;letter-spacing:-.01em}
h2{font-size:1.15rem;margin:1.6rem 0 .5rem;font-weight:600}
p{margin:.5rem 0}
a{color:var(--accent)}
.muted{color:var(--muted);font-size:.92rem}
.card{background:var(--panel);border:1px solid var(--hair);border-radius:10px;padding:1rem 1.1rem;margin:.8rem 0}
label{display:block;font-size:.85rem;color:var(--muted);margin:.7rem 0 .25rem}
input,select,textarea{width:100%;font:inherit;padding:.65rem .75rem;border:1px solid var(--hair);border-radius:8px;background:var(--panel);color:var(--ink)}
input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
button{font:inherit;font-weight:600;padding:.7rem 1rem;border-radius:8px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer;margin-top:.9rem}
button.ghost{background:transparent;color:var(--accent)}
button.small{padding:.35rem .7rem;font-size:.85rem;margin:0}
button:disabled{opacity:.5;cursor:default}
.row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}
.pill{display:inline-block;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;font-weight:600;padding:.1rem .5rem;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
.pill.warn{background:var(--warn-soft);color:var(--warn)}
.msg{padding:.6rem .8rem;border-radius:8px;margin:.6rem 0;font-size:.95rem}
.msg.err{background:var(--warn-soft);color:var(--warn)}
.msg.ok{background:var(--accent-soft);color:var(--accent)}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:.45rem .5rem;border-bottom:1px solid var(--hair);vertical-align:top}
th{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
.tablewrap>table{min-width:640px}
.tablewrap.narrow>table{min-width:0}
th{white-space:nowrap}
details>summary{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem .8rem;cursor:pointer;list-style:none}
details>summary::-webkit-details-marker{display:none}
details>summary::before{content:"▸";width:1em;color:var(--muted);flex:none}
details>summary>[data-en],details>summary>[data-zh]{display:inline}
html[lang=zh] details>summary>[data-en],html[lang=en] details>summary>[data-zh]{display:none}
details[open]>summary::before{content:"▾"}
.gactions{margin-left:auto;display:flex;flex-wrap:wrap;align-items:center;gap:.3rem}
.gactions button,.gactions label{margin:0}
@media (max-width:640px){
  html,body{font-size:16px}
  .card{padding:.8rem .8rem}
  .topbar{flex-wrap:wrap}
  .row>*{min-width:0}
  input,select,textarea{max-width:100%}
  .gactions{margin-left:0;width:100%}
  .tablewrap>table{min-width:560px}
  .tablewrap.narrow>table{min-width:0}
  h1{font-size:1.5rem}
}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:.6rem;font-size:.9rem;margin-bottom:.6rem}
.strip{position:sticky;top:0;z-index:20;background:var(--panel);border:1px solid var(--hair);border-radius:10px;padding:.35rem .6rem;margin:0 0 .9rem;justify-content:flex-start;flex-wrap:wrap;gap:.5rem}
.strip .brand{font-weight:700;letter-spacing:.02em;text-decoration:none;color:var(--ink)}
.strip .crumb{color:var(--muted);font-size:.85rem}
.strip .right{margin-left:auto;display:flex;align-items:center;gap:.5rem}
.strip .right .who{max-width:12rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.strip .right button{margin:0}
.side-btn{border:1px solid var(--hair);background:var(--panel);color:var(--ink);border-radius:8px;padding:.15rem .5rem;font-size:1rem;cursor:pointer;line-height:1.4;margin:0}
.side-btn.menu{padding:.35rem .7rem;min-height:2.4rem;min-width:2.6rem}
details>summary{flex-wrap:nowrap}
details>summary>*{min-width:0}
.side{position:fixed;top:0;bottom:0;width:15.5rem;background:var(--panel);border-right:1px solid var(--hair);overflow-y:auto;z-index:30;padding:.6rem .5rem 1rem;display:flex;flex-direction:column;gap:.4rem;transition:width .15s}
body.side-left .side{left:0;right:auto}
body.side-right .side{right:0;left:auto;border-right:0;border-left:1px solid var(--hair)}
body.side-left main{margin-left:15.5rem}
body.side-right main{margin-right:15.5rem}
main{transition:margin .15s}
.side-head{display:flex;align-items:center;justify-content:space-between;padding:.1rem .4rem .3rem}
.side-head .brand{font-weight:700}
.side-ctl{display:flex;gap:.25rem}
.side-sec{display:flex;flex-direction:column;gap:.05rem}
.side-t{font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:.5rem .6rem .15rem}
.side-a{display:flex;align-items:center;gap:.55rem;padding:.4rem .6rem;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.95rem;white-space:nowrap}
.side-a:hover{background:var(--accent-soft)}
.side-a.on{background:var(--accent);color:#fff}
.side-a .ic{width:1.4rem;text-align:center;flex:none}
.side-a .lb{overflow:hidden;text-overflow:ellipsis}
.side-a .n{margin-left:auto;min-width:1.4em;padding:0 .4em;border-radius:999px;background:var(--warn,#aa6a2a);color:#fff;font-size:.75em;text-align:center}
.side-a .n:empty{display:none}
.side-sub{display:flex;flex-direction:column;margin-left:.6rem;border-left:2px solid var(--hair)}
.side-a.sub{font-size:.85rem;padding:.25rem .5rem;color:var(--muted)}
.side-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:.4rem;padding:.5rem .4rem 0;border-top:1px solid var(--hair);flex-wrap:wrap}
.theme{display:inline-flex;border:1px solid var(--hair);border-radius:8px;overflow:hidden}
.theme button{border:0;background:transparent;color:var(--ink);padding:.15rem .45rem;margin:0;font-size:.8rem;cursor:pointer}
.theme button.on{background:var(--accent);color:#fff}
body.side-fold .theme{display:none}
body.side-fold .side{width:3.4rem;padding:.6rem .3rem 1rem}
body.side-fold.side-left main{margin-left:3.4rem}
body.side-fold.side-right main{margin-right:3.4rem}
body.side-fold .side .lb,body.side-fold .side .side-t,body.side-fold .side .n,body.side-fold .side .brand,body.side-fold .side .side-sub,body.side-fold .side-foot .lang{display:none}
body.side-fold .side-head{justify-content:center}
body.side-fold .side-a{justify-content:center;padding:.5rem .2rem}
body.side-fold .side-foot{justify-content:center}
body.side-fold .side-foot #logout{font-size:.7rem;padding:.2rem .3rem}
.side-back{display:none}
.strip .menu{display:none}
@media (max-width:800px){
  body.side-left main,body.side-right main,body.side-fold.side-left main,body.side-fold.side-right main{margin-left:0;margin-right:0}
  .side,body.side-fold .side{width:min(18rem,85vw);padding:.6rem .5rem 1rem;transform:translateX(-105%);transition:transform .2s}
  body.side-right .side{transform:translateX(105%)}
  body.side-open .side{transform:none}
  body.side-fold .side .lb,body.side-fold .side .side-t,body.side-fold .side .n,body.side-fold .side .brand,body.side-fold .side .side-sub,body.side-fold .side-foot .lang{display:revert}
  body.side-fold .side-a{justify-content:flex-start;padding:.4rem .6rem}
  body.side-open .side-back{display:block;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:25}
  .strip .menu{display:inline-block}
  .side-ctl [data-side="fold"]{display:none}
}
@media (max-width:640px){
  html,body{font-size:16px}
  .card{padding:.8rem .8rem}
  .topbar{flex-wrap:wrap}
  .row>*{min-width:0}
  input,select,textarea{max-width:100%}
  .gactions{margin-left:0;width:100%}
  .tablewrap>table{min-width:560px}
  .tablewrap.narrow>table{min-width:0}
  h1{font-size:1.5rem}
}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:.6rem;font-size:.9rem;margin-bottom:.6rem}
.strip{position:sticky;top:0;z-index:20;background:var(--panel);border:1px solid var(--hair);border-radius:10px;padding:.35rem .6rem;margin:0 0 .9rem;justify-content:flex-start;flex-wrap:wrap}
.strip .brand{font-weight:700;letter-spacing:.02em;text-decoration:none;color:var(--ink);margin-right:.3rem}
.strip .fn{display:flex;gap:.15rem;flex-wrap:wrap;align-items:center}
.strip .fn a{padding:.3rem .65rem;border-radius:8px;text-decoration:none;color:var(--ink);white-space:nowrap}
.strip .fn a:hover{background:var(--accent-soft)}
.strip .fn a.on{background:var(--accent);color:#fff}
.strip .fn a .n{display:inline-block;min-width:1.3em;padding:0 .35em;border-radius:999px;background:var(--warn,#aa6a2a);color:#fff;font-size:.75em;text-align:center;vertical-align:middle}
.strip .fn a .n:empty{display:none}
.strip .right{margin-left:auto;display:flex;align-items:center;gap:.5rem}
.strip .right .who{max-width:12rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.strip .right button{margin:0}
@media (max-width:640px){
  .strip{border-radius:0;margin:0 calc(-1 * clamp(.6rem,2vw,1.4rem)) .8rem;padding:.3rem .5rem}
  .strip .fn{order:3;width:100%;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding:.2rem 0}
  .strip .right .who{display:none}
}
.topbar a{color:var(--accent);text-decoration:none}
.lang{display:inline-flex;border:1px solid var(--hair);border-radius:999px;overflow:hidden}
.lang button{margin:0;border:0;border-radius:0;padding:.25rem .6rem;font-size:.8rem;background:transparent;color:var(--muted)}
.lang button.on{background:var(--accent);color:#fff}
[data-zh]{display:none} html[lang="zh"] [data-en]{display:none} html[lang="zh"] [data-zh]{display:revert}
.code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.4rem;letter-spacing:.15em;font-weight:600}
.hidden{display:none !important}
.rank{font-size:1.3rem;font-weight:600}