/* 作业鸽 shared tokens and base styles */
:root{
  --sky:#E8EDF2; --paper:#FFFFFF; --kidbg:#F5F8FB; --ink:#1C2433; --muted:#5D6A7C; --line:#D4DCE5;
  --teal:#0E8577; --teal-soft:#DDF1EE; --plum:#6646B0; --plum-d:#4E3391; --plum-soft:#ECE6F8;
  --gold:#D9900B; --gold-soft:#FCF0D6; --good:#1F8A4C; --warn:#B4541A; --chip:#EEF2F6;
  --pg-body:#9EAABA; --pg-head:#AEB9C7; --pg-wing:#8693A5; --pg-bar:#3B4250; --pg-neck1:#2E9C8C; --pg-neck2:#7B5BC4;
  --pg-eye:#F08A24; --pg-beak:#3A3F4A; --pg-feet:#D9757A;
  --f-display:"ZCOOL KuaiLe","PingFang SC","Hiragino Sans GB",sans-serif;
  --f-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --f-num:"Baloo 2","SF Pro Rounded",ui-rounded,system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root{
  --sky:#11151B; --paper:#1A2029; --kidbg:#161B23; --ink:#E7ECF2; --muted:#9AA6B6; --line:#2B3441;
  --teal:#3BC0AF; --teal-soft:#16302D; --plum:#9E82E8; --plum-d:#7458C9; --plum-soft:#272040;
  --gold:#F0B444; --gold-soft:#33291A; --good:#4CC57F; --warn:#F0965A; --chip:#232B36; color-scheme:dark}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--kidbg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.55;-webkit-tap-highlight-color:transparent}
button{font:inherit}
button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--plum);outline-offset:2px}
.hint{color:var(--muted);font-size:15px;margin:0}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.coin{width:18px;height:18px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#FFE39A,var(--gold) 70%);box-shadow:inset 0 0 0 2px rgba(0,0,0,.08);display:inline-block;flex:none}
.btn{font-weight:700;font-size:19px;border:0;border-radius:16px;padding:14px 28px;cursor:pointer;background:var(--teal);color:#fff;transition:transform .12s;text-decoration:none;display:inline-block}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.35;cursor:default;transform:none}
.btn.ghost{background:var(--chip);color:var(--ink)}
.btn.plum{background:var(--plum)}
.btn.sm{font-size:15px;padding:9px 16px;border-radius:12px}
.toast{background:var(--plum);color:#fff;padding:10px 18px;border-radius:99px;font-weight:700;font-size:16px;box-shadow:0 8px 24px -8px rgba(0,0,0,.4);animation:pop .4s}
@keyframes pop{from{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}
.conn{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.conn i{width:8px;height:8px;border-radius:50%;background:var(--good)}
.conn.off i{background:var(--warn)}
.conn.off{color:var(--warn)}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}