:root{
  --paper:#F1F7F6; --grid:rgba(29,53,87,.07); --ink:#1D3557; --ink2:#50657A; --card:#FFFFFF; --line:#CCDFDB;
  --teal:#128F82; --tan:#EE8424; --berry:#D6456A; --sun:#E0A82A; --good:#2A9A58; --soft:#E3F1EE; --grape:#7B5CD6;
  --display:"Mitr",system-ui,sans-serif; --body:"Mali",system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#12202A; --grid:rgba(255,255,255,.045); --ink:#E8F2F0; --ink2:#A4B9BD; --card:#1A2A36; --line:#2C4351;
  --teal:#38C0B0; --tan:#F49B45; --berry:#EF7091; --sun:#F5CC5A; --good:#4CC27C; --soft:#1E3440; --grape:#A58BF0; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#12202A; --grid:rgba(255,255,255,.045); --ink:#E8F2F0; --ink2:#A4B9BD; --card:#1A2A36; --line:#2C4351;
  --teal:#38C0B0; --tan:#F49B45; --berry:#EF7091; --sun:#F5CC5A; --good:#4CC27C; --soft:#1E3440; --grape:#A58BF0; color-scheme:dark}
*{box-sizing:border-box}
html,body{min-height:100%;margin:0}
body{background-color:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.5;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:26px 26px}
a{color:var(--teal)}
h1,h2,h3{font-family:var(--display);line-height:1.35;margin:0;text-wrap:balance}
button,input,select{font:inherit;color:inherit}
button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--tan);outline-offset:3px}
.wrap{max-width:960px;margin:0 auto;padding:14px 16px 60px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:22px}
.brand{font-family:var(--display);font-weight:600;font-size:1.35rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px}
.brand b{background:var(--teal);color:#fff;border-radius:10px;padding:0 8px;transform:rotate(-4deg);display:inline-block}
.who{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-weight:700}
.pill{border:2px solid var(--line);background:var(--card);border-radius:999px;padding:4px 14px;font-weight:700;font-size:.95rem;text-decoration:none;color:var(--ink)}
.pill.dark{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.card{background:var(--card);border:2px solid var(--line);border-radius:18px;box-shadow:5px 5px 0 var(--line);padding:18px}
.lbl{font-family:var(--display);font-weight:700;letter-spacing:.06em;font-size:.82rem;color:var(--tan)}
.hero{margin:6px 0 30px}
.hero h1{font-size:clamp(2rem,6vw,3rem);font-weight:600}
.hero h1 span{color:var(--teal)}
.hero p{margin:6px 0 0;color:var(--ink2);max-width:56ch}
.grade{margin-bottom:30px}
.grade h2{font-size:1.45rem;display:flex;gap:10px;align-items:baseline;margin-bottom:12px}
.grade h2 small{font-family:var(--body);font-size:.85rem;color:var(--ink2);font-weight:400}
.lessons{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.lesson{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:var(--ink);background:var(--card);border:2px solid var(--line);border-radius:18px;box-shadow:5px 5px 0 var(--line);padding:16px;min-height:190px;position:relative}
a.lesson:hover{transform:translate(-1px,-1px);box-shadow:6px 6px 0 var(--c)}
.lesson .ic{font-size:2.2rem;width:58px;height:58px;border-radius:16px;display:grid;place-items:center;background:color-mix(in srgb,var(--c) 18%,var(--card));transform:rotate(-3deg)}
.lesson .sj{font-family:var(--display);font-weight:600;color:var(--c);font-size:.9rem}
.lesson h3{font-size:1.2rem}
.lesson p{margin:0;color:var(--ink2);font-size:.92rem;line-height:1.4}
.lesson .ft{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:8px;font-weight:700;font-size:.9rem}
.lesson .go{background:var(--c);color:#fff;border-radius:12px;padding:4px 12px;font-family:var(--display)}
.lesson.soon{opacity:.6;box-shadow:none;border-style:dashed}
.lesson.soon .go{background:var(--line);color:var(--ink2)}
.meter{height:10px;background:var(--soft);border-radius:999px;overflow:hidden;flex:1}
.meter i{display:block;height:100%;background:var(--c);border-radius:999px}
.c-teal{--c:var(--teal)}.c-berry{--c:var(--berry)}.c-tan{--c:var(--tan)}.c-sun{--c:var(--sun)}
.later{display:flex;gap:10px;flex-wrap:wrap}
.later span{border:2px dashed var(--line);border-radius:14px;padding:8px 14px;font-family:var(--display);font-weight:600;color:var(--ink2);background:var(--card)}
/* forms */
.narrow{max-width:440px;margin:0 auto}
.form{display:grid;gap:14px}
.form label{display:grid;gap:4px;font-weight:700}
.form label small{font-weight:400;color:var(--ink2)}
.form input,.form select{border:2px solid var(--line);border-radius:12px;padding:10px 14px;background:var(--card);font-size:1.1rem;width:100%}
.form input.pin{letter-spacing:.5em;font-family:var(--display);font-size:1.6rem;text-align:center}
.btn{border:0;background:var(--tan);color:#fff;font-family:var(--display);font-weight:600;font-size:1.2rem;border-radius:16px;padding:12px 22px;box-shadow:0 5px 0 color-mix(in srgb,var(--tan) 60%,#000);cursor:pointer;text-decoration:none;display:inline-block;text-align:center}
.btn:active{transform:translateY(3px);box-shadow:0 2px 0 color-mix(in srgb,var(--tan) 60%,#000)}
.btn.alt{background:var(--teal);box-shadow:0 5px 0 color-mix(in srgb,var(--teal) 60%,#000)}
.btn.sm{font-size:.95rem;padding:6px 14px;border-radius:12px;box-shadow:0 3px 0 color-mix(in srgb,var(--tan) 60%,#000)}
.ghost{border:2px solid var(--line);background:var(--card);border-radius:12px;padding:6px 14px;font-weight:700;cursor:pointer;text-decoration:none;color:var(--ink);display:inline-block}
.ghost.red{border-color:var(--berry);color:var(--berry)}
.msg{border-radius:14px;padding:10px 14px;font-weight:700}
.msg.err{background:color-mix(in srgb,var(--berry) 15%,var(--card));border:2px solid var(--berry)}
.msg.ok{background:color-mix(in srgb,var(--good) 15%,var(--card));border:2px solid var(--good)}
.center{text-align:center}
.muted{color:var(--ink2)}
/* tables (admin) */
.tw{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.95rem}
td,th{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-family:var(--display);font-size:.95rem}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.inline{display:inline-flex;gap:6px;align-items:center;flex-wrap:wrap}
.inline input{border:2px solid var(--line);border-radius:10px;padding:4px 8px;background:var(--card);width:90px}
footer{margin-top:40px;text-align:center;color:var(--ink2);font-size:.85rem}
.c-grape{--c:var(--grape)}

/* home: other grades folded away for logged-in children */
.others{margin:8px 0 24px}
.others>summary{cursor:pointer;font-family:Mitr,sans-serif;font-weight:600;font-size:1.15rem;padding:12px 16px;border:2px dashed rgba(0,0,0,.15);border-radius:16px;list-style:none}
.others>summary::-webkit-details-marker{display:none}
.others>summary small{font-family:inherit;font-weight:400;font-size:.85rem;opacity:.7;margin-left:6px}
.others[open]>summary{margin-bottom:18px}
/* app: "remember on this device" checkbox */
.form label.chk{display:flex;gap:10px;align-items:center;font-weight:600}
.form label.chk input{width:auto;transform:scale(1.4);accent-color:var(--teal)}
.apphint{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:-14px 0 22px;padding:12px 16px}
[hidden]{display:none!important}