:root{
  --bg:#070b16; --panel:#10182a; --panel2:#151f35; --line:#2a3854;
  --ink:#f7f9ff; --muted:#8f9bb3; --yellow:#ffd93d; --cyan:#2ed9ff;
  --green:#2ed573; --red:#ff5c6c; --purple:#9b7bff; --shadow:0 22px 70px #0008;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; min-height:100vh; color:var(--ink); background:
  radial-gradient(circle at 8% 0%,#152350 0,transparent 30%),
  radial-gradient(circle at 94% 18%,#183b46 0,transparent 28%),var(--bg);
  font-family:"Noto Sans TC","Microsoft JhengHei","Segoe UI",sans-serif;
}
body::after{
  content:""; position:fixed; inset:0; z-index:-2; opacity:.16; pointer-events:none;
  background-image:linear-gradient(#7ca0d512 1px,transparent 1px),linear-gradient(90deg,#7ca0d512 1px,transparent 1px);
  background-size:42px 42px; mask-image:linear-gradient(to bottom,#000,transparent 82%);
}
#gridCanvas{position:fixed;inset:0;z-index:-1;pointer-events:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}
.notice{
  position:relative;z-index:20;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;
  padding:9px 18px;background:var(--yellow);color:#10131d;font-size:.88rem
}
.topbar{
  position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  min-height:72px;padding:12px clamp(18px,4vw,64px);background:#070b16df;
  border-bottom:1px solid #43516a80;backdrop-filter:blur(16px)
}
.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}
.brand-mark{
  display:grid;place-items:center;width:48px;height:48px;border:2px solid var(--yellow);
  color:var(--yellow);font:900 .84rem/1 monospace;box-shadow:4px 4px 0 #ffd93d33
}
.brand-mark span{animation:blink .9s steps(1) infinite}
.brand b{display:block;font-size:1.06rem}
.brand small{display:block;margin-top:4px;color:var(--muted);font:700 .61rem/1 monospace;letter-spacing:1.5px}
.top-actions,.lang-toggle,.input-row{display:flex;align-items:center;gap:10px}
.mode-badge{font:800 .69rem/1 monospace;letter-spacing:1px;padding:8px 11px;border:1px solid;border-radius:99px}
.mode-badge.demo{color:var(--yellow);background:#ffd93d12}
.mode-badge.live{color:var(--green);background:#2ed57312}
.lang-toggle{gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.lang-toggle button{border:0;background:transparent;color:var(--muted);padding:8px 11px;font-weight:800}
.lang-toggle button.active{background:var(--cyan);color:#07101d}
.icon-btn,.text-btn{
  border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);
  padding:9px 13px;font-weight:800
}
.icon-btn:hover,.text-btn:hover{border-color:var(--cyan);color:var(--cyan)}
main{width:min(1180px,calc(100% - 36px));margin:0 auto}
.hero{
  min-height:310px;display:flex;align-items:center;justify-content:space-between;gap:40px;
  padding:52px 0 34px
}
.eyebrow,.kicker{color:var(--cyan);font:800 .72rem/1.2 monospace;letter-spacing:2.6px}
h1,h2,p{margin-top:0}
h1{max-width:750px;margin-bottom:15px;font-size:clamp(2.3rem,6vw,5.1rem);line-height:1.02;letter-spacing:-.05em}
h1 em{color:var(--yellow);font-style:normal;text-shadow:0 0 32px #ffd93d44}
.hero p:last-child{max-width:720px;color:#b7c1d3;font-size:1.04rem;line-height:1.75}
.hero-orbit{
  flex:0 0 240px;aspect-ratio:1;position:relative;display:grid;place-items:center;border:1px solid #2ed9ff55;
  border-radius:50%;box-shadow:inset 0 0 60px #2ed9ff13,0 0 70px #2ed9ff0c;animation:float 4s ease-in-out infinite
}
.hero-orbit::before{content:"";position:absolute;inset:24px;border:1px dashed #ffd93d77;border-radius:50%;animation:spin 18s linear infinite}
.hero-orbit strong{font-size:2.4rem;filter:drop-shadow(0 0 14px #ffd93d88)}
.hero-orbit span{position:absolute;background:var(--bg);padding:5px;color:var(--cyan);font:800 .65rem monospace}
.hero-orbit span:first-child{left:-13px}.hero-orbit span:last-child{right:-35px}
.panel,.overview,.lessons{
  background:linear-gradient(145deg,#121b2eeb,#0d1424eb);border:1px solid var(--line);
  border-radius:18px;box-shadow:var(--shadow)
}
.settings-panel{padding:26px;margin-bottom:28px;animation:slideDown .28s ease both}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
.section-head h2{margin:4px 0 0;font-size:1.5rem}
.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px;color:#d6ddec;font-weight:750}
.field.wide{grid-column:1/-1}
.field small,.manual-box p{color:var(--muted);font-size:.8rem;font-weight:500}
input,select,textarea{
  width:100%;border:1px solid var(--line);border-radius:9px;background:#070d19;color:var(--ink);
  padding:12px 13px;outline:none
}
input:focus,select:focus,textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px #2ed9ff16}
select option{background:#0d1424}
.input-row input{flex:1}
.secondary-btn,.publish-btn{
  border:1px solid var(--cyan);border-radius:9px;background:#2ed9ff13;color:var(--cyan);
  padding:11px 15px;font-weight:850;white-space:nowrap
}
.secondary-btn:hover{background:var(--cyan);color:#07101d}
.secondary-btn:disabled{cursor:wait;opacity:.6}
.test-btn{border-color:var(--line);color:#d6ddec;background:#ffffff08}
.connection-status{min-height:1.2em;color:var(--muted);font-size:.82rem;font-weight:650}
.connection-status.success{color:var(--green)}
.connection-status.warning{color:var(--yellow)}
.connection-status.pending{color:var(--cyan)}
.manual-box{margin-top:20px;border-top:1px solid var(--line);padding-top:18px}
.manual-box summary{cursor:pointer;color:var(--yellow);font-weight:800}
.manual-box textarea{margin:12px 0;font:500 .78rem/1.45 Consolas,monospace;resize:vertical}
.inline-status{margin-left:10px;color:var(--green);font-size:.82rem}
.overview{padding:26px;margin-bottom:28px}
.total-count{font:900 1.7rem monospace;color:var(--yellow)}
.progress-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.progress-card{padding:17px;border:1px solid var(--line);border-radius:12px;background:#09101e}
.progress-meta{display:flex;justify-content:space-between;margin-bottom:11px;font-weight:850}
.progress-meta span:last-child{color:var(--muted);font:800 .8rem monospace}
.progress-track{height:8px;border-radius:9px;background:#222d43;overflow:hidden}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--green));box-shadow:0 0 14px #2ed9ff88;transition:width .5s ease}
.lessons{padding:26px;margin-bottom:55px}
.lesson-toolbar{display:flex;justify-content:space-between;gap:16px;margin-bottom:23px}
.tabs{display:flex;gap:7px}
.tabs button{
  border:1px solid var(--line);border-radius:9px;background:#0a111f;color:var(--muted);
  padding:10px 17px;font-weight:850
}
.tabs button.active{background:var(--yellow);border-color:var(--yellow);color:#10131d;box-shadow:0 0 24px #ffd93d25}
.search{width:min(290px,100%);position:relative}
.search span{position:absolute;left:12px;top:7px;color:var(--cyan);font-size:1.4rem}
.search input{padding-left:36px}
.table-head,.lesson-row{
  display:grid;grid-template-columns:90px minmax(250px,1fr) 125px minmax(160px,230px);
  gap:15px;align-items:center
}
.table-head{padding:0 15px 10px;color:var(--muted);font:750 .68rem monospace;letter-spacing:1.5px}
.lesson-list{display:grid;gap:9px}
.lesson-row{
  position:relative;padding:14px 15px;border:1px solid #26324a;border-radius:11px;background:#0a111f;
  animation:rowIn .36s both;animation-delay:var(--delay)
}
.lesson-row::before{content:"";position:absolute;left:-1px;top:25%;width:3px;height:50%;background:var(--cyan);opacity:.5}
.lesson-id{color:var(--cyan);font:900 .83rem monospace}
.lesson-title b{display:block;margin-bottom:3px}
.lesson-title small{color:var(--muted)}
.status{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:.8rem;font-weight:800}
.status::before{content:"";width:8px;height:8px;border-radius:50%;background:#59647a}
.status.done{color:var(--green)}.status.done::before{background:var(--green);box-shadow:0 0 10px #2ed573}
.actions{display:flex;align-items:center;justify-content:flex-end;gap:8px}
.publish-btn{background:var(--yellow);border-color:var(--yellow);color:#111522}
.publish-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ffd93d33}
.publish-btn:disabled{cursor:wait;opacity:.6;transform:none}
.result-links{display:flex;gap:5px}
.result-links a{
  display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);
  border-radius:8px;color:var(--cyan);text-decoration:none;font-size:.75rem;font-weight:900
}
.result-links a:hover{border-color:var(--cyan);background:#2ed9ff15}
.empty{text-align:center;padding:45px;color:var(--muted)}
footer{
  width:min(1180px,calc(100% - 36px));margin:0 auto 35px;display:flex;justify-content:space-between;
  gap:15px;color:#68758e;font:700 .68rem monospace;letter-spacing:1px
}
.toast{
  position:fixed;right:22px;bottom:22px;z-index:30;max-width:min(420px,calc(100% - 44px));
  padding:14px 17px;border:1px solid var(--cyan);border-radius:10px;background:#111b2e;
  box-shadow:var(--shadow);transform:translateY(30px);opacity:0;pointer-events:none;transition:.25s
}
.toast.show{transform:none;opacity:1}.toast.error{border-color:var(--red)}
@keyframes spin{to{transform:rotate(360deg)}}@keyframes blink{50%{opacity:0}}
@keyframes float{50%{transform:translateY(-10px)}}@keyframes slideDown{from{opacity:0;transform:translateY(-14px)}}
@keyframes rowIn{from{opacity:0;transform:translateX(-12px)}}
@media(max-width:800px){
  .brand small,.mode-badge{display:none}.topbar{padding-inline:14px}.hero{min-height:250px}
  .hero-orbit{display:none}.settings-grid,.progress-grid{grid-template-columns:1fr}.field.wide{grid-column:auto}
  .lesson-toolbar{flex-direction:column}.search{width:100%}.table-head{display:none}
  .lesson-row{grid-template-columns:70px 1fr}.lesson-row .status{grid-column:1/2}.actions{grid-column:2/3}
}
@media(max-width:520px){
  main{width:min(100% - 22px,1180px)}.brand b{font-size:.88rem}.icon-btn span{display:none}
  h1{font-size:2.25rem}.hero{padding-top:38px}.panel,.overview,.lessons{padding:18px;border-radius:13px}
  .tabs{width:100%}.tabs button{flex:1;padding-inline:6px}.input-row{align-items:stretch;flex-direction:column}
  .lesson-row{grid-template-columns:1fr}.lesson-row>*{grid-column:1!important}.actions{justify-content:flex-start;flex-wrap:wrap}
  footer{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important;transition:none!important}}