/* Sky-Lab Junior - bright, friendly, touch-first */
:root{
  --bg:#f3f8ff; --card:#ffffff; --ink:#1b2a41; --mute:#5b6b82; --line:#d9e4f2;
  --sky:#2f80ed; --sky2:#e3efff; --sun:#ffb703; --sun2:#fff3d1; --leaf:#2bb673; --leaf2:#ddf6ea;
  --berry:#ef476f; --berry2:#fde3ea; --grape:#7b61ff; --grape2:#ece8ff;
  --r:18px; --shadow:0 2px 0 rgba(27,42,65,.06), 0 8px 24px rgba(27,42,65,.06);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.5 "Nunito","Segoe UI",system-ui,-apple-system,Roboto,sans-serif}
a{color:var(--sky)}
button{font:inherit}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:space-between;
  padding:10px 16px;background:#fff;border-bottom:2px solid var(--line)}
.logo{font-weight:900;font-size:21px;text-decoration:none;color:var(--ink);letter-spacing:.2px}
.logo span{color:var(--sky)} .logo small{font-size:12px;color:#fff;background:var(--sun);border-radius:8px;padding:1px 7px;margin-left:4px;vertical-align:3px}
.me{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.pill{background:var(--sun2);border-radius:999px;padding:5px 12px;font-weight:800;white-space:nowrap}
.pill.rank{background:var(--sky2);color:var(--sky)}
.wrap{max-width:1100px;margin:0 auto;padding:20px 16px 60px}
h1{font-size:clamp(28px,5vw,42px);line-height:1.15;margin:4px 0 8px}
h2{font-size:24px;margin:28px 0 10px}
h3{margin:0 0 6px}
.lead{font-size:19px;color:var(--mute);max-width:760px;margin:0 0 14px}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.real{border-left:8px solid var(--leaf);background:linear-gradient(90deg,var(--leaf2),#fff 55%)}
.learn{border-left:8px solid var(--sun);background:linear-gradient(90deg,var(--sun2),#fff 55%)}
.think{border-left:8px solid var(--grape);background:linear-gradient(90deg,var(--grape2),#fff 55%)}
.unplug{border-left:8px solid var(--berry);background:linear-gradient(90deg,var(--berry2),#fff 55%)}
.tag{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.4px;text-transform:uppercase;color:var(--mute);margin-bottom:4px}
.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;border:0;border-radius:14px;padding:12px 18px;
  font-weight:800;font-size:17px;cursor:pointer;background:var(--sky);color:#fff;text-decoration:none;min-height:48px;
  box-shadow:0 4px 0 #1c5fbf;transition:transform .05s}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 #1c5fbf}
.btn.go{background:var(--leaf);box-shadow:0 4px 0 #1e8a56}
.btn.warn{background:var(--berry);box-shadow:0 4px 0 #b8324f}
.btn.soft{background:#fff;color:var(--ink);border:2px solid var(--line);box-shadow:0 3px 0 var(--line)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.levels{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 12px}
.lv{border:2px solid var(--line);background:#fff;border-radius:14px;padding:8px 12px;cursor:pointer;font-weight:800;min-width:92px;text-align:left}
.lv small{display:block;color:var(--sun);font-size:15px;letter-spacing:1px}
.lv.on{border-color:var(--sky);background:var(--sky2)}
.lv:disabled{opacity:.45;cursor:not-allowed}
.goal{background:var(--sky2);border-radius:14px;padding:12px 14px;margin-bottom:12px;font-size:17px}
.goal b{color:var(--sky)}
canvas{display:block;width:100%;border-radius:14px;background:#cfe6ff;touch-action:none}
.result{display:none;margin-top:12px;border-radius:14px;padding:14px;background:var(--leaf2)}
.result.show{display:block}
.result.bad{background:var(--berry2)}
.bigstars{font-size:34px;letter-spacing:6px;color:var(--sun)}
.toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%,140px);background:var(--ink);color:#fff;padding:12px 18px;
  border-radius:14px;font-weight:800;z-index:50;transition:transform .35s;max-width:92vw;text-align:center}
.toast.show{transform:translate(-50%,0)}
.hint{color:var(--mute);font-size:15px}
.kbd{display:inline-block;border:2px solid var(--line);border-bottom-width:4px;border-radius:8px;padding:0 7px;font-weight:800;background:#fff}
input[type=range]{width:100%;accent-color:var(--sky);height:34px}
select,input[type=number],input[type=text],textarea{font:inherit;border:2px solid var(--line);border-radius:12px;padding:8px 10px;background:#fff;color:var(--ink)}
textarea{width:100%;min-height:70px}
.meter{height:16px;border-radius:9px;background:#e8eef7;overflow:hidden}
.meter>div{height:100%;border-radius:9px;transition:width .2s}
.quiz button{display:block;width:100%;text-align:left;margin:6px 0;background:#fff;border:2px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer;font-weight:700;color:var(--ink)}
.quiz button.right{background:var(--leaf2);border-color:var(--leaf)} .quiz button.wrong{background:var(--berry2);border-color:var(--berry)}
/* ---------- block coding ---------- */
.coder{display:grid;grid-template-columns:200px 1fr;gap:12px}
.palette{display:flex;flex-direction:column;gap:7px}
.palette .hint{margin:2px 0}
.blk{border:0;border-radius:12px;padding:9px 12px;color:#fff;font-weight:800;text-align:left;cursor:pointer;font-size:16px;
  box-shadow:0 3px 0 rgba(0,0,0,.18);display:flex;align-items:center;gap:8px;min-height:44px}
.blk:active{transform:translateY(2px)}
.prog{background:#f7faff;border:2px dashed var(--line);border-radius:14px;padding:10px;min-height:180px;display:flex;flex-direction:column;gap:6px}
.prog .empty{color:var(--mute);text-align:center;margin:auto}
.pblk{display:flex;align-items:center;gap:8px;border-radius:12px;padding:6px 8px 6px 12px;color:#fff;font-weight:800;min-height:42px;
  box-shadow:0 3px 0 rgba(0,0,0,.15);cursor:pointer;user-select:none}
.pblk .num{background:rgba(255,255,255,.3);border-radius:9px;padding:2px 10px;cursor:pointer}
.pblk .x{margin-left:auto;background:rgba(0,0,0,.18);border:0;color:#fff;border-radius:9px;width:32px;height:32px;cursor:pointer;font-weight:900}
.pblk.sel{outline:3px solid var(--sun);outline-offset:2px}
.pblk.run{outline:4px solid #fff;filter:brightness(1.15);transform:scale(1.02)}
.pblk.err{outline:4px solid var(--berry)}
.c-move{background:#2f80ed}.c-turn{background:#7b61ff}.c-loop{background:#f08c00}.c-act{background:#2bb673}.c-sense{background:#ef476f}
.count{font-weight:800;color:var(--mute);font-size:15px}
@media (max-width:820px){.grid2{grid-template-columns:1fr}.coder{grid-template-columns:1fr}.palette{flex-direction:row;flex-wrap:wrap}.palette .blk{flex:1 1 140px}}
@media print{.topbar,.noprint{display:none!important} body{background:#fff}}