/* course.css — shared stylesheet for the "Reversible vs Irreversible Choices" course
   Audience: kids aged 5–7. English UI. Big, warm, playful, print-friendly. */

@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;600;700;800&family=Nunito:wght@600;700;800&display=swap');

:root{
  --ink:        #2b2140;   /* soft dark plum, easier on kids than pure black */
  --paper:      #fffdf7;   /* warm cream */
  --eraser:     #4aa3df;   /* blue = "you can fix it / do-over" */
  --eraser-bg:  #e8f4fc;
  --forever:    #f2762e;   /* orange = "stop & think" */
  --forever-bg: #fdeee2;
  --good:       #35b06a;
  --oops:       #e0567a;
  --sun:        #ffd23f;
  --shadow:     0 8px 0 rgba(43,33,64,.12), 0 14px 30px rgba(43,33,64,.10);
  --radius:     28px;
}

*{ box-sizing:border-box; }

body{
  margin:0;
  font-family:'Nunito', system-ui, -apple-system, sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1200px 600px at 15% -10%, #fff5d6 0%, transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, #e8f4fc 0%, transparent 55%),
    var(--paper);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

.wrap{ max-width:820px; margin:0 auto; padding:28px 20px 72px; }

h1,h2,h3,.big{ font-family:'Baloo 2', 'Nunito', system-ui, sans-serif; line-height:1.15; }

h1{ font-size:clamp(30px,7vw,46px); font-weight:800; margin:.2em 0 .1em; }
h2{ font-size:clamp(22px,5vw,30px); font-weight:700; margin:1.4em 0 .3em; }
.eyebrow{ font-weight:800; letter-spacing:.12em; text-transform:uppercase;
  font-size:14px; color:var(--forever); margin:0; }

.read{ font-size:clamp(18px,4vw,22px); }

/* ---- reusable pill / card ---- */
.card{
  background:#fff; border-radius:var(--radius); box-shadow:var(--shadow);
  padding:22px 24px; border:3px solid #fff;
}
.grid2{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
@media (max-width:620px){ .grid2{ grid-template-columns:1fr; } }

.type{ border-radius:var(--radius); padding:20px 22px; box-shadow:var(--shadow); }
.type h3{ font-size:26px; margin:.1em 0 .2em; display:flex; align-items:center; gap:10px; }
.type.eraser  { background:var(--eraser-bg);  border:3px solid var(--eraser); }
.type.forever { background:var(--forever-bg); border:3px solid var(--forever); }
.type .emojis{ font-size:34px; letter-spacing:6px; margin-top:10px; }
.type p{ font-size:19px; margin:.3em 0; }

.rule{
  text-align:center; background:var(--sun); color:var(--ink);
  border-radius:var(--radius); padding:18px; box-shadow:var(--shadow);
  font-family:'Baloo 2',sans-serif; font-weight:800; font-size:clamp(20px,4.5vw,26px);
  border:3px solid #fff;
}

/* ---- the sorting game ---- */
.game{ text-align:center; }
.stage{
  background:#fff; border-radius:var(--radius); box-shadow:var(--shadow);
  padding:30px 20px; margin:14px 0 18px; border:3px solid #fff;
  min-height:220px; display:flex; flex-direction:column; align-items:center; justify-content:center;
}
.stage .face{ font-size:76px; line-height:1; margin-bottom:8px; }
.stage .phrase{ font-family:'Baloo 2',sans-serif; font-weight:700; font-size:clamp(22px,5vw,30px); }
.buttons{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
@media (max-width:520px){ .buttons{ grid-template-columns:1fr; } }
.btn{
  font-family:'Baloo 2',sans-serif; font-weight:800; font-size:22px; color:#fff;
  border:none; border-radius:22px; padding:20px 12px; cursor:pointer;
  box-shadow:0 6px 0 rgba(0,0,0,.15); transition:transform .06s ease;
}
.btn:active{ transform:translateY(4px); box-shadow:0 2px 0 rgba(0,0,0,.15); }
.btn.eraser  { background:var(--eraser); }
.btn.forever { background:var(--forever); }
.btn:disabled{ opacity:.55; cursor:default; }

.feedback{
  font-family:'Baloo 2',sans-serif; font-weight:700; font-size:20px;
  min-height:64px; margin:16px 0 6px; padding:12px 16px; border-radius:18px;
}
.feedback.good{ background:#e4f7ec; color:var(--good); }
.feedback.oops{ background:#fdeaf0; color:var(--oops); }
.feedback.idle{ color:#8a80a0; }

.progress{ font-weight:800; color:#8a80a0; font-size:16px; }
.scorebar{ height:14px; background:#efe9df; border-radius:999px; overflow:hidden; margin:8px 0 2px; }
.scorebar > i{ display:block; height:100%; width:0; background:var(--good); transition:width .3s ease; }

.win{ text-align:center; }
.win .trophy{ font-size:90px; }

.shake{ animation:shake .4s; }
@keyframes shake{ 0%,100%{transform:translateX(0)} 20%{transform:translateX(-10px)}
  40%{transform:translateX(10px)} 60%{transform:translateX(-8px)} 80%{transform:translateX(8px)} }
.pop{ animation:pop .35s; }
@keyframes pop{ 0%{transform:scale(.7)} 60%{transform:scale(1.12)} 100%{transform:scale(1)} }

/* ---- grown-up note & footer ---- */
.grown{ background:#f4f0ff; border:2px dashed #b6a8e0; border-radius:20px;
  padding:16px 20px; font-family:'Nunito',sans-serif; font-size:15px; color:#5b5175; }
.grown h3{ font-family:'Nunito',sans-serif; font-size:15px; text-transform:uppercase;
  letter-spacing:.1em; margin:0 0 .4em; color:#7a6cae; }
.ask{ text-align:center; font-size:18px; color:#7a6cae; margin-top:26px; }
a{ color:var(--eraser); font-weight:700; }
.hidden{ display:none; }
footer.nav{ margin-top:30px; display:flex; gap:14px; flex-wrap:wrap; justify-content:center;
  font-family:'Baloo 2',sans-serif; }

/* ---- bilingual (中英双语) ---- */
.zh{ font-family:'Nunito','Baloo 2',"PingFang SC","Microsoft YaHei",sans-serif;
  color:#8a7fb0; font-weight:700; display:block; }
h1 .zh, h2 .zh, .type h3 .zh, .rule .zh, .stage .phrase .zh{ color:inherit; opacity:.7; }
.type .zh, .card .zh, .read .zh{ font-size:.8em; margin-top:2px; }
h1 .zh{ font-size:.55em; } h2 .zh{ font-size:.6em; }
.rule .zh{ font-size:.72em; opacity:.85; }
.stage .phrase .zh{ font-size:.7em; }

/* language modes set on <body> */
body.lang-en .zh{ display:none; }
body.lang-zh .en{ display:none; }

.langbar{ display:flex; gap:8px; justify-content:flex-end; margin:0 0 6px; }
.langbar button{
  font-family:'Baloo 2',sans-serif; font-weight:800; font-size:15px; cursor:pointer;
  border:2px solid var(--eraser); background:#fff; color:var(--eraser);
  border-radius:999px; padding:6px 14px; }
.langbar button.on{ background:var(--eraser); color:#fff; }

@media print{
  body{ background:#fff; }
  .btn,.stage{ box-shadow:none; }
  .buttons,.game .stage,.progress,.scorebar,.langbar{ display:none; }
}