/* Suken eBook: phone-first styles. Colours follow the printed books. */
:root {
  --blue: #1b1fd6; --blue-d: #1216a0; --lav: #eef0ff; --lav2: #dfe3ff;
  --teal: #1ba1c5; --teal-l: #e3f5fa; --orange: #ff8000; --orange-l: #fff1e0; --sun: #ffcd3c; --sun-l: #fff6d8;
  --purple: #800080; --purple-l: #f6e9f6; --green: #14823c; --green-l: #e4f5ea; --red: #cc0000; --red-l: #fde8e8;
  --ink: #1d1d35; --muted: #5a5a78; --line: #dcdcec; --bg: #f6f7fb; --card: #ffffff;
  --gold: #d6a300; --silver: #8c91a0; --bronze: #b06e32;
  --r: 14px; --shadow: 0 1px 2px rgba(20,20,60,.06), 0 4px 14px rgba(20,20,60,.06);
  --font: 'Nunito', 'Kantumruy Pro', system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 17px; line-height: 1.5; }
body.km { font-family: 'Kantumruy Pro', 'Nunito', system-ui, sans-serif; line-height: 1.7; }
button { font: inherit; cursor: pointer; }
a { color: var(--blue); }
img.fig { max-width: 100%; height: auto; display: block; margin: 8px auto; }
.figwrap img.fig { width: auto; max-height: 260px; }
.ava-inline { height: 34px; vertical-align: middle; }
mjx-container { font-size: 108%; }
mjx-container[display="true"] { overflow-x: auto; overflow-y: hidden; }
.qdone { color: var(--green); } .qopen { color: var(--muted); }
.btn.arm { background: var(--red); }
.go.soon { font-size: 12px; font-weight: 700; color: var(--muted); white-space: nowrap; }

/* ---------- top bar ---------- */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--blue); color: #fff; padding-block: 10px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: flex; align-items: center; gap: 10px; box-shadow: 0 2px 8px rgba(0,0,60,.18); }
.top .back { background: none; border: 0; color: #fff; font-size: 24px; line-height: 1; padding: 4px 8px 4px 0; }
.top .t { flex: 1; min-width: 0; }
.top .t b { display: block; font-size: 16px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.top .t small { opacity: .85; font-size: 12.5px; }
.xpchip { background: rgba(255,255,255,.16); border-radius: 99px; padding: 3px 10px; font-weight: 800; font-size: 14px; white-space: nowrap; }
.lang { background: #fff; color: var(--blue); border: 0; border-radius: 99px; padding: 3px 10px; font-weight: 800; font-size: 13px; }
.bar { height: 5px; background: rgba(255,255,255,.25); border-radius: 9px; overflow: hidden; margin-top: 5px; }
.bar i { display: block; height: 100%; background: var(--sun); border-radius: 9px; }

main { max-width: 760px; margin: 0 auto; padding-block: 14px 120px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--blue); }
h1 { font-size: 24px; margin: 6px 0 4px; line-height: 1.25; }
h2 { font-size: 19px; margin: 22px 0 10px; color: var(--blue); }
h3 { font-size: 17px; margin: 0 0 6px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

/* ---------- home ---------- */
.hero { background: var(--blue); background-image: repeating-linear-gradient(0deg, rgba(255,255,255,.06) 0 1px, transparent 1px 22px), repeating-linear-gradient(90deg, rgba(255,255,255,.06) 0 1px, transparent 1px 22px); color: #fff; border-bottom: 5px solid var(--orange); border-radius: 20px; padding: 18px; box-shadow: var(--shadow); }
.hero .kyu { font-weight: 800; letter-spacing: .3px; opacity: .9; font-size: 14px; }
.hero h1 { color: #fff; font-size: 26px; margin: 2px 0 6px; }
.hero .stats { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.stat { background: rgba(255,255,255,.15); border-radius: 12px; padding: 8px 12px; min-width: 84px; }
.stat b { display: block; font-size: 20px; }
.stat span { font-size: 12.5px; opacity: .9; }
.chor { display: flex; gap: 6px; margin: 14px 0 0; flex-wrap: wrap; }
.chor span { background: #fff; color: var(--blue); border-radius: 10px; padding: 4px 9px; font-size: 13px; font-weight: 700; }
.chor span .kh { font-family: 'Kantumruy Pro'; }
.tiles { display: grid; grid-template-columns: 1fr; gap: 10px; }
.tile { display: flex; align-items: center; gap: 12px; background: var(--card); border-radius: var(--r); padding: 12px 14px; box-shadow: var(--shadow);
  border: 1px solid var(--line); text-decoration: none; color: var(--ink); text-align: left; width: 100%; }
.tile .num { width: 44px; height: 44px; border-radius: 12px; background: var(--lav); color: var(--blue); display: grid; place-items: center; font-weight: 800; flex: none; font-size: 15px; }
.tile .body { flex: 1; min-width: 0; }
.tile .body b { display: block; line-height: 1.3; }
.tile .body small { color: var(--muted); font-size: 13.5px; }
.tile .go { color: var(--blue); font-weight: 800; font-size: 20px; }
.tile.locked { opacity: .55; }
.tile.locked .go { color: var(--muted); font-size: 14px; }
.tile .ring { width: 38px; height: 38px; flex: none; }
.tile.mock .num { background: var(--purple-l); color: var(--purple); }
.tile.drill .num { background: var(--teal-l); color: var(--teal); }
.seg { display: flex; background: var(--lav); border-radius: 12px; padding: 4px; gap: 4px; margin: 16px 0 10px; }
.seg button { flex: 1; border: 0; background: none; border-radius: 9px; padding: 8px 4px; font-weight: 800; color: var(--blue); font-size: 14.5px; }
.seg button.on { background: #fff; box-shadow: var(--shadow); }

/* ---------- lesson home ---------- */
.lesson-hero { background: var(--card); border-radius: 18px; padding: 16px; box-shadow: var(--shadow); border-top: 6px solid var(--blue); }
.lesson-hero .lnum { color: var(--purple); font-weight: 800; font-size: 14px; letter-spacing: .5px; }
.strip { background: var(--lav); border-left: 4px solid var(--blue); border-radius: 10px; padding: 10px 12px; margin: 12px 0; font-size: 15px; }
.strip b.lab { color: var(--blue); }
.path { position: relative; margin: 14px 0; }
.stop { display: flex; gap: 12px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 11px 12px;
  margin-bottom: 9px; box-shadow: var(--shadow); text-decoration: none; color: var(--ink); width: 100%; text-align: left; }
.stop .dot { width: 34px; height: 34px; border-radius: 50%; border: 3px solid var(--lav2); display: grid; place-items: center; flex: none; font-weight: 800; font-size: 13px; color: var(--blue); background: #fff; }
.stop.done .dot { background: var(--green); border-color: var(--green); color: #fff; }
.stop.next .dot { border-color: var(--orange); color: var(--orange); }
.stop .body { flex: 1; min-width: 0; }
.stop .body b { display: block; line-height: 1.3; font-size: 15.5px; }
.tag5 { display: inline-block; font-size: 12px; font-weight: 800; border-radius: 6px; padding: 1px 7px; margin-top: 3px; }
.tag5 .kh { font-family: 'Kantumruy Pro'; font-weight: 700; }
.t-chol { background: var(--lav); color: var(--blue); } .t-chong { background: var(--orange-l); color: #b35a00; }
.t-cham { background: var(--teal-l); color: #0b7390; } .t-chenh { background: var(--purple-l); color: var(--purple); } .t-cheh { background: var(--sun-l); color: #8a6a00; }

/* ---------- blocks ---------- */
.blk { background: var(--card); border-radius: var(--r); padding: 14px; margin: 14px 0; box-shadow: var(--shadow); border: 1px solid var(--line); }
.blk > .head { display: flex; align-items: center; gap: 8px; margin: -14px -14px 12px; padding: 9px 14px; border-radius: var(--r) var(--r) 0 0; font-weight: 800; font-size: 14px; letter-spacing: .3px; }
.head .pill { margin-left: auto; font-size: 12px; font-weight: 800; background: rgba(255,255,255,.25); border-radius: 99px; padding: 1px 8px; }
.h-blue { background: var(--blue); color: #fff; } .h-teal { background: var(--teal); color: #fff; } .h-orange { background: var(--orange); color: #fff; }
.h-purple { background: var(--purple); color: #fff; } .h-green { background: var(--green); color: #fff; } .h-red { background: var(--red); color: #fff; }
.h-dark { background: #3b2a26; color: #fff; } .h-gold { background: var(--gold); color: #fff; }
.secttl { display: flex; align-items: baseline; gap: 10px; margin: 18px 0 6px; }
.secttl .n { background: var(--teal); color: #fff; font-weight: 800; border-radius: 8px; padding: 2px 9px; font-size: 15px; }
.secttl h2 { margin: 0; }

/* speech */
.say { display: flex; gap: 10px; align-items: flex-end; margin: 10px 0; }
.say.R { flex-direction: row-reverse; }
.say .ava { width: 54px; height: 54px; flex: none; }
.say .ava img { width: 100%; height: 100%; object-fit: contain; }
.bub { position: relative; background: var(--lav); border-radius: 16px; padding: 9px 12px; font-size: 15.5px; max-width: 100%; }
.say.L .bub { border-bottom-left-radius: 4px; } .say.R .bub { border-bottom-right-radius: 4px; }
.bub .nm { display: block; font-size: 12px; font-weight: 800; color: var(--muted); margin-bottom: 1px; }
.who-Dara .bub { background: #e3f4fa; } .who-Sophea .bub { background: #f1edfd; } .who-Bopha .bub { background: #fde9ef; }
.who-Kiri .bub { background: #fff3cf; } .who-Tokay .bub { background: #e5f6ea; }
.work { display: block; background: #fff; border: 1.5px solid var(--lav2); border-radius: 10px; padding: 8px 10px; margin: 6px 0; }
.note { display: block; color: var(--green); font-size: 14px; margin-top: 6px; }
.box { display: inline-block; width: 2.4em; height: 1.4em; border: 1.5px solid var(--ink); vertical-align: middle; border-radius: 3px; }
.tool { display: inline-block; background: var(--orange-l); color: #b35a00; border: 1px solid #ffcf9a; font-size: 12px; font-weight: 800; border-radius: 6px; padding: 0 6px; margin: 0 2px; }
.skill { font-style: italic; color: var(--muted); font-size: 14px; }
.center { text-align: center; }
table.tab { border-collapse: collapse; margin: 8px auto; font-size: 15px; }
table.tab td { border: 1px solid var(--line); padding: 5px 9px; text-align: center; }
table.tab tr:first-child td { background: var(--lav); font-weight: 700; }
.mp { display: block; }

/* example */
.ex-q { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.row { border-top: 1px dashed var(--line); padding-top: 6px; }
.row .workcol { margin: 2px 0 6px 64px; }
.say.R + .workcol, .row.R .workcol { margin: 2px 64px 6px 0; }
.ans { margin-top: 10px; background: var(--red-l); border-radius: 10px; padding: 8px 12px; font-weight: 700; }
.ans .lab { color: var(--red); margin-right: 6px; }

/* buttons */
.btn { border: 0; border-radius: 12px; padding: 11px 16px; font-weight: 800; background: var(--blue); color: #fff; font-size: 15.5px; }
.btn.ghost { background: var(--lav); color: var(--blue); }
.btn.ok { background: var(--green); } .btn.no { background: #8a8aa6; }
.btn.orange { background: var(--orange); } .btn.small { padding: 7px 12px; font-size: 14px; border-radius: 10px; }
.btn[disabled] { opacity: .45; cursor: default; }
.btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.btn.block { width: 100%; }

/* quiz items */
.item { border-top: 1px solid var(--line); padding: 12px 0 10px; }
.item:first-of-type { border-top: 0; padding-top: 2px; }
.item .qn { display: inline-block; min-width: 26px; color: var(--blue); font-weight: 800; }
.item .q { display: inline; }
.inrow { display: flex; gap: 8px; margin-top: 9px; align-items: stretch; }
.mathin { flex: 1; min-height: 44px; border: 2px solid var(--lav2); border-radius: 11px; padding: 8px 11px; font-size: 18px; background: #fff; display: flex; align-items: center;
  font-family: 'Nunito', sans-serif; font-weight: 700; overflow-x: auto; white-space: nowrap; cursor: text; }
.mathin.focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(27,31,214,.12); }
.mathin .ph { color: #a0a0bc; font-weight: 600; font-size: 15px; }
.mathin .caret { display: inline-block; width: 2px; height: 1.1em; background: var(--blue); animation: blink 1s steps(1) infinite; margin-left: 1px; }
@keyframes blink { 50% { opacity: 0; } }
.fb { margin-top: 8px; border-radius: 10px; padding: 8px 11px; font-size: 15px; }
.fb.ok { background: var(--green-l); color: #0c5a28; }
.fb.no { background: var(--red-l); color: #8a0000; }
.fb.show { background: var(--sun-l); color: #4a3a00; }
.fb .key { font-weight: 800; }
.mark { float: right; font-weight: 800; }
.mark.ok { color: var(--green); } .mark.no { color: var(--red); }
.star { color: var(--gold); }
.gold { border-left: 4px solid var(--gold); padding-left: 10px; }

/* memory card */
.card { background: var(--sun-l); border: 2px solid var(--orange); border-radius: 16px; overflow: hidden; margin: 14px 0; box-shadow: var(--shadow); }
.card .ch { display: flex; align-items: center; gap: 10px; padding: 10px 14px 4px; }
.card .ch img { width: 46px; height: 46px; }
.card .ch b { color: #a14c00; font-size: 17px; }
.card .lbl { font-size: 11.5px; font-weight: 800; letter-spacing: .6px; color: #b35a00; padding: 0 14px; text-transform: uppercase; }
.card .rules { padding: 4px 14px 10px; }
.card .rule { display: flex; gap: 8px; margin: 6px 0; }
.card .rule:before { content: ''; flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--orange); margin-top: 8px; }
.card .hooks { background: #e8f6fa; border-top: 2px dashed var(--orange); padding: 10px 14px 12px; }
.card .hooks .lbl { color: #0b7390; padding: 0 0 4px; }
.link { display: inline-flex; align-items: center; gap: 4px; background: var(--teal); color: #fff; font-size: 11.5px; font-weight: 800; border-radius: 6px; padding: 1px 7px; margin-right: 6px; letter-spacing: .3px; }
.hook { margin: 8px 0; }
.sayline { margin-top: 10px; background: #fff; border-radius: 10px; padding: 8px 10px; color: var(--purple); font-weight: 700; }
.covered .rules .rule span, .covered .hook .ht { filter: blur(6px); user-select: none; }
.more { background: #fff8e6; border: 1.5px solid var(--sun); border-radius: 14px; padding: 12px 14px; margin: 14px 0; display: flex; gap: 10px; }
.more img { width: 44px; height: 44px; flex: none; }
.more b { color: #8a6a00; }

/* trap */
.trap .wrong { background: var(--red-l); border-radius: 12px; padding: 10px 12px; }
.trap .right { background: var(--green-l); border-radius: 12px; padding: 10px 12px; margin-top: 8px; }
.trap .why { font-size: 14px; color: var(--muted); margin-top: 6px; }

/* story */
.panels { display: grid; grid-template-columns: 1fr; gap: 6px; }
.storyfig { background: #fff; border-radius: 12px; border: 1px solid var(--line); margin-top: 10px; padding: 6px; }

/* big picture */
.bp-core { text-align: center; background: var(--blue); color: #fff; border-radius: 14px; padding: 12px; font-weight: 800; }
.bp-grid { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 10px; }
.bp-item { border: 2px solid var(--lav2); border-radius: 14px; padding: 10px 12px; background: #fbfbff; }
.bp-item .tt { display: flex; align-items: center; gap: 8px; color: var(--blue); font-weight: 800; }
.bp-item .tt .tg { margin-left: auto; background: var(--orange); color: #fff; font-size: 12px; border-radius: 6px; padding: 1px 7px; white-space: nowrap; }
.score { display: grid; grid-template-columns: repeat(15, 1fr); gap: 3px; margin: 6px 0 2px; }
.score i { display: block; aspect-ratio: 1; border-radius: 4px; background: #e6e6ee; font-style: normal; font-size: 9.5px; text-align: center; line-height: 1.9; color: #777; }
.score i.on { background: var(--orange); color: #fff; font-weight: 800; }
.score2 { display: grid; grid-template-columns: repeat(9, 1fr); gap: 3px; }
.score2 i { font-style: normal; font-size: 10px; text-align: center; padding: 3px 0; border-radius: 4px; background: #e6e6ee; color: #777; }
.score2 i.on { background: var(--purple); color: #fff; }
.links { display: grid; grid-template-columns: 1fr; gap: 6px; }
.links div { display: flex; align-items: center; gap: 6px; font-size: 14px; }
.links .a { background: var(--lav); border-radius: 8px; padding: 3px 8px; flex: 1; }
.links .b { background: var(--purple-l); border-radius: 8px; padding: 3px 8px; flex: 1; }

/* blanks */
.blank { display: inline-block; min-width: 3.2em; border-bottom: 2px solid var(--orange); margin: 0 3px; vertical-align: baseline; }
.blank input { width: 5em; border: 0; background: var(--orange-l); border-radius: 6px 6px 0 0; font: inherit; font-weight: 800; padding: 1px 4px; text-align: center; color: var(--ink); }
.blank.ok input { background: var(--green-l); color: var(--green); }
.blank.no input { background: var(--red-l); color: var(--red); }
.stage { display: flex; align-items: center; gap: 8px; margin: 14px 0 4px; font-weight: 800; color: var(--purple); }
.stage .sn { background: var(--purple); color: #fff; border-radius: 50%; width: 26px; height: 26px; display: grid; place-items: center; font-size: 13px; }
.step { animation: up .25s ease; }
@keyframes up { from { transform: translateY(6px); } to { transform: none; } }

/* match */
.match { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px; }
.match .col { display: flex; flex-direction: column; gap: 6px; }
.match button { border: 2px solid var(--lav2); background: #fff; border-radius: 10px; padding: 7px 8px; text-align: left; min-height: 42px; }
.match button.sel { border-color: var(--blue); background: var(--lav); }
.match button.paired { border-color: var(--teal); }
.match button .pn { float: right; background: var(--teal); color: #fff; border-radius: 6px; font-size: 12px; padding: 0 6px; font-weight: 800; }

/* problems */
.prob .tags { font-size: 13px; color: var(--muted); font-weight: 700; }
.coach { background: var(--orange-l); border-left: 5px solid var(--orange); border-radius: 12px; padding: 10px 12px; margin: 14px 0; }
.coach b.lab { color: #b35a00; }
.cheat { display: grid; grid-template-columns: 1fr; gap: 8px; }
.cheat .cp { border: 1.5px solid var(--lav2); border-radius: 12px; padding: 9px 11px; }
.cheat .cp b { color: var(--blue); display: block; margin-bottom: 3px; }

/* page nav */
.pagenav { display: flex; gap: 10px; margin-top: 22px; }
.pagenav .btn { flex: 1; }

/* mock & drill */
.timer { font-variant-numeric: tabular-nums; font-weight: 800; background: rgba(255,255,255,.18); border-radius: 99px; padding: 3px 10px; }
.timer.low { background: var(--red); }
.qgrid { display: grid; grid-template-columns: repeat(10, 1fr); gap: 5px; margin: 10px 0; }
.qgrid button { border: 0; border-radius: 8px; background: #e8e8f2; font-weight: 800; font-size: 13px; padding: 7px 0; }
.qgrid button.has { background: var(--lav2); color: var(--blue); }
.qgrid button.cur { outline: 3px solid var(--orange); }
.qgrid button.ok { background: var(--green); color: #fff; } .qgrid button.no { background: var(--red); color: #fff; }
.big { font-size: 40px; font-weight: 800; line-height: 1.1; }
.result { text-align: center; }
.medal { display: inline-grid; place-items: center; width: 92px; height: 92px; border-radius: 50%; color: #fff; font-weight: 800; margin: 8px; box-shadow: var(--shadow); }
.medal.gold { background: var(--gold); } .medal.silver { background: var(--silver); } .medal.bronze { background: var(--bronze); } .medal.pass { background: var(--teal); } .medal.try { background: #9a9ab4; }
.secres { display: flex; gap: 10px; justify-content: center; margin: 10px 0; }
.secres div { background: var(--card); border-radius: 12px; padding: 10px 14px; box-shadow: var(--shadow); min-width: 120px; }
.secres .p { font-weight: 800; }
.secres .y { color: var(--green); } .secres .n { color: var(--red); }
.dq { font-size: 26px; text-align: center; padding: 26px 8px 18px; }
.stars { font-size: 30px; letter-spacing: 4px; }

/* keypad */
.keypad { position: fixed; left: 0; right: 0; bottom: 0; z-index: 50; background: #e9eaf3; border-top: 1px solid #cfd0e0; padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 18px rgba(0,0,40,.12); }
.keypad .rowk { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; max-width: 560px; margin: 0 auto 6px; }
.keypad button { border: 0; border-radius: 10px; background: #fff; font-size: 19px; font-weight: 700; padding: 10px 0; box-shadow: 0 1px 0 #c7c8d8; font-family: 'Nunito', sans-serif; }
.keypad button.op { background: #f3f3fb; color: var(--blue); }
.keypad button.go { background: var(--blue); color: #fff; }
.keypad button.del { background: #f3f3fb; }
.keypad .hint { text-align: center; font-size: 12.5px; color: var(--muted); margin-bottom: 6px; }

.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: 24px; background: #1d1d35; color: #fff; border-radius: 99px; padding: 9px 18px; font-weight: 800; z-index: 60; box-shadow: var(--shadow); }
.xpfly { color: var(--sun); }

@media (min-width: 640px) {
  .tiles { grid-template-columns: 1fr 1fr; }
  .bp-grid { grid-template-columns: 1fr 1fr; }
  .panels { grid-template-columns: 1fr 1fr; }
  .cheat { grid-template-columns: 1fr 1fr; }
  .links { grid-template-columns: 1fr 1fr; }
}
.work { overflow-x: auto; max-width: 100%; }
.nb { white-space: nowrap; }
/* every button sets its own text colour: phones in dark mode otherwise give white text on white keys */
button { color: var(--ink); }
.keypad button { color: var(--ink); }
.keypad button.op { color: var(--blue); }
.keypad button.go { color: #fff; }
.match button, .qgrid button { color: var(--ink); }
.qgrid button.has { color: var(--blue); }
.qgrid button.ok, .qgrid button.no { color: #fff; }
.seg button { color: var(--blue); }
.blank input { color: var(--ink); }
/* Khmer: lines break only between words (the words are marked in the content) */
.kw { white-space: nowrap; }
.head .ht, .stage > span:last-child { min-width: 0; }
/* full book (2026-10-26): highlights, boxes and inline arrows from the LaTeX, Explore cards */
.hl { background: #FFDEAA; border-radius: 3px; padding: 0 2px; }
.boxed { display: inline-block; border: 1.5px solid var(--ink); padding: 0 5px; min-width: 1.2em; text-align: center; line-height: 1.3; }
img.fig.inl { display: inline-block; height: 1.1em; width: auto; margin: 0 4px; vertical-align: middle; }
.stop.sub { margin-left: 26px; padding: 8px 12px; border-style: dashed; }
.stop.sub .dot { width: 26px; height: 26px; border-width: 2px; color: var(--teal); border-color: var(--teal-l); }
.blk.explore .simbody { min-height: 40px; }
.figwrap { text-align: center; }
/* long formulas on a phone: shrink to the width of their box instead of pushing the page sideways */
mjx-container[jax="SVG"] { max-width: 100%; }
mjx-container[jax="SVG"] > svg { max-width: 100%; height: auto; }
.nb mjx-container[jax="SVG"] { max-width: calc(100% - 0.9em); }
mjx-container[jax="SVG"][display="true"] { overflow-x: auto; overflow-y: hidden; }
@media (max-width: 430px) {
  .say .ava { width: 42px; height: 42px; }
  .say { gap: 7px; }
}
/* MathJax's hidden copy for screen readers keeps the formula's full width: keep it tiny so it cannot widen the page */
mjx-assistive-mml { max-width: 1px !important; overflow: hidden !important; }
/* wide tables scroll inside their own box on a phone */
.tabwrap { max-width: 100%; overflow-x: auto; }
@media (max-width: 430px) { table.tab td { padding: 4px 6px; font-size: 14px; } }

/* ---------- accounts, coach dashboard, assigned work (platform 2026-10-26; only seen with a server) ---------- */
.form .field { display: block; margin: 0 0 12px; }
.form .field > span { display: block; font-weight: 800; font-size: 14.5px; margin-bottom: 4px; color: var(--ink); }
.form input, .form select, .form textarea { width: 100%; font: inherit; font-size: 17px; color: var(--ink); background: #fff; border: 2px solid var(--lav2); border-radius: 11px; padding: 10px 12px; min-height: 46px; }
.form textarea { min-height: 150px; line-height: 1.5; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(27,31,214,.12); }
.form input.pinbox { font-size: 26px; letter-spacing: 12px; text-align: center; font-weight: 800; font-family: 'Nunito', sans-serif; }
.form .field[hidden] { display: none; }
.msg { border-radius: 10px; padding: 9px 12px; font-size: 15px; margin: 8px 0; }
.msg.err { background: var(--red-l); color: #8a0000; }
.msg.ok { background: var(--green-l); color: #0c5a28; }
.msg.warn { background: var(--sun-l); color: #5a4500; }
.signhero { margin-bottom: 4px; }
.acct { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 12px 0 4px; font-weight: 800; font-size: 15px; }
.acct a { text-decoration: none; }
div > .acct + .btn { margin-top: 6px; }
div > .btn.block + .btn.block { margin-top: 8px; }
.pend { background: var(--sun-l); color: #6a5200; border-radius: 99px; padding: 1px 9px; font-size: 13px; }
.late { color: var(--red) !important; font-weight: 800; }
.assigned .arow { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-top: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.assigned .arow:first-of-type { border-top: 0; }
.assigned .arow .tick { width: 30px; height: 30px; border-radius: 50%; background: var(--orange-l); color: #b35a00; display: grid; place-items: center; font-weight: 800; flex: none; }
.assigned .arow.done .tick { background: var(--green); color: #fff; }
.assigned .arow .body { flex: 1; min-width: 0; }
.assigned .arow .body b { display: block; line-height: 1.3; font-size: 15.5px; }
.assigned .arow .body small { color: var(--muted); font-size: 13.5px; }
.assigned .arow .go { color: var(--blue); font-weight: 800; font-size: 20px; }
.assigned .arow.done b { color: var(--muted); }
.sumrow { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 4px 0 12px; }
.sumrow div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 8px 10px; box-shadow: var(--shadow); }
.sumrow b { display: block; font-size: 20px; color: var(--blue); }
.sumrow span { font-size: 12.5px; color: var(--muted); }
.scard { display: block; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 11px 13px; margin-bottom: 9px; box-shadow: var(--shadow); text-decoration: none; color: var(--ink); }
.scard .sh { display: flex; align-items: center; gap: 8px; }
.scard .sh b { flex: 1; min-width: 0; font-size: 16px; }
.scard .xp { font-weight: 800; color: var(--blue); white-space: nowrap; }
.chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 6px; }
.chip { display: inline-block; font-size: 12.5px; font-weight: 700; border-radius: 99px; padding: 1px 8px; background: var(--lav); color: var(--blue); white-space: nowrap; }
.chip.m-gold { background: var(--gold); color: #fff; } .chip.m-silver { background: var(--silver); color: #fff; } .chip.m-bronze { background: var(--bronze); color: #fff; }
.chip.m-pass { background: var(--teal); color: #fff; } .chip.m-none { background: #ececf4; color: var(--muted); }
.chip.lockc { background: var(--red-l); color: var(--red); }
.chip.yes { background: var(--green-l); color: #0c5a28; } .chip.no { background: #f0f0f6; color: var(--muted); }
.who { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.witem { border-top: 1px solid var(--line); padding: 9px 0; }
.witem:first-of-type { border-top: 0; }
.witem .wl { display: flex; flex-direction: column; gap: 1px; }
.witem .wq { margin-top: 6px; background: #fafaff; border-radius: 8px; padding: 6px 9px; }
.witem .key { font-weight: 800; }
.wbar { height: 7px; border-radius: 9px; background: #ececf4; overflow: hidden; margin-top: 6px; }
.wbar i { display: block; height: 100%; background: var(--red); border-radius: 9px; }
.wbar.ok i { background: var(--green); }
.linkbox input { margin: 8px 0; width: 100%; font-size: 13px; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.mono { font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace; letter-spacing: .5px; }
.ctools { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; margin: 2px 0 6px; }
.staff .xpchip { display: none; }
.blk > .head .pill { white-space: nowrap; }
/* login slips: one per student, cut along the dashed lines */
.slips { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 12px; }
.slip { background: #fff; border: 2px dashed #9a9ab4; border-radius: 12px; padding: 12px 14px; break-inside: avoid; page-break-inside: avoid; }
.slip .sl-h { font-weight: 800; color: var(--blue); font-size: 14px; }
.slip .sl-c { font-size: 13px; color: var(--muted); }
.slip .sl-n { font-size: 19px; font-weight: 800; margin: 4px 0 6px; }
.slip .sl-row { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line); padding: 5px 0; }
.slip .sl-row span { font-size: 13px; color: var(--muted); }
.slip .sl-row b { font-size: 22px; }
.slip .sl-u { font-size: 13px; font-weight: 700; word-break: break-all; margin-top: 4px; }
.slip .sl-i { font-size: 12px; color: var(--muted); margin-top: 4px; line-height: 1.5; }
@media (min-width: 640px) { .slips { grid-template-columns: 1fr 1fr; } .sumrow { grid-template-columns: repeat(4, 1fr); } }
@media print {
  @page { margin: 10mm; }
  body { background: #fff; }
  body::before, .top, .msg, .btn, .toast, .keypad { display: none !important; }
  main { padding: 0; max-width: none; }
  .slips { grid-template-columns: 1fr 1fr; gap: 6mm; }
}
/* teach view: projector-friendly, everything larger (coaches only) */
body.teach main { max-width: 1180px; zoom: 1.35; }
body.teach .top .t b { font-size: 19px; }
@media (max-width: 700px) { body.teach main { zoom: 1.15; } }

/* ---------- roles brief 2026-10-26: fees, receipts, parent slips, school overview, personal bests, portfolio ---------- */
.seg.small button { font-size: 13.5px; padding: 6px 4px; }
.chip.paid { background: var(--green-l); color: #0c5a28; } .chip.unpaid { background: var(--sun-l); color: #6a5200; }
.chip.tg { background: #e3f1fb; color: #0b5c8a; }
.chip.st-tutor { background: var(--blue); color: #fff; } .chip.st-teacher { background: var(--teal-l); color: #0b6a84; } .chip.st-manager { background: var(--purple-l); color: var(--purple); } .chip.st-admin { background: #ececf4; color: var(--muted); }
.witem.voided { opacity: .62; } .witem.voided b { text-decoration: line-through; }
.payrow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; } .payrow .wl { flex: 1; min-width: 150px; } .payrow > div:last-child { flex-basis: 100%; }
.payform { background: #fafaff; border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin-top: 6px; }
.admintools { display: flex; flex-wrap: wrap; gap: 8px; align-items: flex-end; margin-top: 8px; border-top: 1px dashed var(--line); padding-top: 8px; }
.form.inline { display: flex; gap: 8px; align-items: flex-end; flex: 1; min-width: 220px; } .form.inline .field { flex: 1; margin: 0; }
.check { display: flex; gap: 8px; align-items: flex-start; margin: 4px 0 12px; font-size: 15px; } .check input { width: 22px; height: 22px; min-height: 0; flex: none; margin-top: 2px; }
/* receipt */
.receipt { background: #fff; border: 2px solid var(--lav2); border-radius: 14px; padding: 16px; margin-top: 12px; position: relative; overflow: hidden; }
.receipt .rc-h { display: flex; gap: 10px; align-items: center; border-bottom: 3px solid var(--blue); padding-bottom: 8px; }
.receipt .rc-h img { width: 40px; height: 40px; } .receipt .rc-h b { display: block; color: var(--blue); font-size: 18px; } .receipt .rc-h small { color: var(--muted); font-size: 12.5px; }
.receipt .rc-t { text-align: center; font-weight: 800; letter-spacing: 1px; margin: 10px 0 6px; font-size: 17px; }
.receipt .rc-row { display: flex; justify-content: space-between; gap: 10px; border-top: 1px solid var(--line); padding: 7px 0; }
.receipt .rc-row > span { color: var(--muted); font-size: 13px; flex: none; max-width: 45%; } .receipt .rc-row > b { text-align: right; }
.receipt .rc-amt { font-size: 22px; color: var(--green); }
.receipt .rc-f { text-align: center; margin-top: 12px; font-weight: 800; } .receipt .rc-f small { font-weight: 400; color: var(--muted); }
.receipt .rc-void { position: absolute; top: 42%; left: -10%; right: -10%; transform: rotate(-14deg); text-align: center; font-size: 34px; font-weight: 900; color: rgba(204,0,0,.55); border: 4px solid rgba(204,0,0,.45); background: rgba(255,255,255,.6); }
.receipt .rc-void small { display: block; font-size: 13px; font-weight: 700; }
/* parent slips */
.pslip .ps-b { display: flex; gap: 12px; align-items: center; margin: 4px 0; }
.pslip .qr { flex: none; width: 128px; height: 128px; } .pslip .qr svg { display: block; width: 128px; height: 128px; }
.pslip .ps-r { min-width: 0; flex: 1; } .pslip .ps-code { display: block; font-size: 24px; letter-spacing: 2px; margin: 2px 0 4px; }
/* personal bests */
.spark { flex: none; vertical-align: middle; margin-left: 6px; }
.tile .spark { margin-right: 4px; }
.medals { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.medal.honour { background: linear-gradient(135deg, #6b2fbf, #b0369a); color: #fff; }
.pb { margin: 10px auto 2px; max-width: 420px; background: var(--lav); border-radius: 12px; padding: 9px 12px; font-size: 15px; position: relative; }
.pb.new { background: linear-gradient(135deg, #fff1c2, #ffd76a); color: #5a3d00; display: flex; flex-wrap: wrap; gap: 4px 10px; justify-content: center; align-items: baseline; }
.pb.new b { font-size: 18px; flex-basis: 100%; } .pb .pbn { font-size: 22px; font-weight: 900; } .pb .gain { background: var(--green); color: #fff; border-radius: 99px; padding: 0 9px; font-weight: 800; }
.pb.first { background: var(--teal-l); } .pb.same { background: var(--green-l); }
.pb.anim { animation: pbpop .7s cubic-bezier(.2,1.6,.4,1) both; }
.pb .spk { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--orange); top: 50%; left: 50%; opacity: 0; }
.pb.anim .spk { animation: spark 1s ease-out .2s both; } .pb.anim .spk.s2 { background: var(--blue); animation-delay: .3s; --dx: -80px; } .pb.anim .spk.s3 { background: var(--green); animation-delay: .4s; --dx: 70px; --dy: 30px; }
@keyframes pbpop { 0% { transform: scale(.6); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
@keyframes spark { 0% { opacity: 1; transform: translate(0, 0) scale(1); } 100% { opacity: 0; transform: translate(var(--dx, 60px), var(--dy, -40px)) scale(.3); } }
@media (prefers-reduced-motion: reduce) { .pb.anim, .pb.anim .spk { animation: none; } }
.goal { color: #6a3d00; font-weight: 700; }
.pbline { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; background: #fafaff; border-radius: 10px; padding: 6px 10px; margin: 6px 0; }
.pbline.center { justify-content: center; }
.journey .medalrow, .sclass .medalrow { margin: 4px 0 6px; }
.medalrow { display: flex; flex-wrap: wrap; gap: 6px; }
.medalrow .md { border-radius: 99px; padding: 2px 10px; font-size: 14px; background: #f0f0f6; white-space: nowrap; }
.md.m-gold { background: #fff3c4; } .md.m-silver { background: #eceef3; } .md.m-bronze { background: #f6e3d2; } .md.m-honour { background: #efe3fb; }
.jbest { margin: 4px 0; }
/* rating card */
.stars5 { display: flex; gap: 6px; margin: 4px 0 8px; }
.stars5 .star { font-size: 30px; line-height: 1; background: none; border: 0; color: #c9c9d9; padding: 4px; min-width: 44px; min-height: 44px; }
.stars5 .star.on { color: var(--gold); }
.ratecm { width: 100%; font: inherit; font-size: 15px; border: 2px solid var(--lav2); border-radius: 10px; padding: 8px; margin-bottom: 8px; }
/* coach portfolio */
.pf { background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); padding: 0 0 12px; margin: 10px 0; overflow: hidden; }
.pf > *:not(.pf-band) { margin-left: 14px; margin-right: 14px; }
.pf-band { display: flex; align-items: center; gap: 8px; background: var(--blue); color: #fff; padding: 8px 14px; } .pf-band img { width: 26px; height: 26px; background: #fff; border-radius: 6px; }
.pf-band span { margin-left: auto; font-size: 13px; opacity: .9; }
.pf-id { display: flex; gap: 12px; align-items: center; margin-top: 12px; } .pf-id h2 { margin: 0 0 2px; font-size: 21px; }
.pf-photo { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; flex: none; border: 3px solid var(--lav2); }
.pf-initial { display: grid; place-items: center; font-size: 34px; font-weight: 900; color: var(--blue); background: var(--lav); }
.pf-cert { display: inline-block; margin-top: 4px; background: #fff3c4; color: #5a3d00; border-radius: 99px; padding: 2px 10px; font-size: 13px; font-weight: 800; }
.pf-bio { font-size: 15.5px; }
.pf-tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px; }
.pf-tiles > div { background: var(--lav); border-radius: 12px; padding: 9px 10px; }
.pf-tiles b { display: block; font-size: 24px; color: var(--blue); line-height: 1.2; } .pf-tiles b i { font-style: normal; color: var(--gold); font-size: 15px; }
.pf-tiles span { display: block; font-weight: 800; font-size: 13px; } .pf-tiles small { color: var(--muted); font-size: 12px; }
.pf-mock { margin-top: 10px; font-size: 13.5px; background: #fafaff; border: 1px dashed var(--lav2); border-radius: 10px; padding: 7px 10px; }
.pf-com { margin-top: 10px; } .pf-com blockquote { margin: 6px 0; background: #fafaff; border-left: 4px solid var(--orange); border-radius: 8px; padding: 6px 10px; }
.pf-com blockquote small { display: block; color: var(--muted); font-size: 12px; }
table.stats { border-collapse: collapse; font-size: 13.5px; min-width: 640px; } table.stats th, table.stats td { border-bottom: 1px solid var(--line); padding: 6px 7px; text-align: left; vertical-align: top; }
table.stats th { cursor: pointer; background: var(--lav); white-space: nowrap; } table.stats th.on { background: var(--lav2); }
@media (min-width: 640px) { .pf-tiles { grid-template-columns: repeat(4, 1fr); } }
@media print {
  .noprint { display: none !important; }
  .pf { box-shadow: none; border: 0; } .receipt { border: 0; }
  .pf-band, .pf-tiles > div, .pf-cert, .pb { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}
a.btn { display: inline-block; text-decoration: none; }