/* Bright, readable activity colors. */
:root{--ink:#233357;--accent:#7041c7;--edge:#b29ae4;--wash:#eee6ff;--sun:#ffe479}
body{background:#fff9ed;background-image:radial-gradient(circle at 8% 18%,#ffdce8 0,transparent 26%),radial-gradient(circle at 93% 48%,#d2f2ff 0,transparent 28%);color:var(--ink)}
body[data-subject="math"]{--accent:#175cbd;--edge:#7bb5fa;--wash:#e0efff}
body[data-subject="ela"]{--accent:#9a2670;--edge:#e88fca;--wash:#ffe2f3}
body[data-subject="studies"]{--accent:#096b68;--edge:#5ec5b3;--wash:#d9f8ec}
body[data-subject="name-spelling"]{--accent:#7835ba;--edge:#bb90ea;--wash:#f0dfff}
body[data-subject="brain-games"]{--accent:#9a4310;--edge:#f7a450;--wash:#fff0cf}
.hero,main>header{position:relative;overflow:hidden;background:linear-gradient(115deg,var(--wash),#fff1b4);border:3px solid var(--edge);border-radius:28px;box-shadow:0 7px 0 #23335712;padding:28px}
.hero:after{content:"";position:absolute;width:130px;height:130px;right:-48px;top:-48px;border:22px solid #ffffff7a;border-radius:50%;pointer-events:none}
.subject-stamp{display:inline-flex;align-items:center;justify-content:center;min-width:74px;height:74px;font-size:44px;background:#fff;border-radius:23px;border:3px solid var(--edge);margin-bottom:10px;box-shadow:4px 4px 0 #23335712}
h1,h2{color:var(--ink)}.eyebrow{color:var(--accent)}
.subjectnav a{background:#fff;border:2px solid var(--edge);border-radius:14px;padding:10px 14px;text-decoration:none;color:var(--accent);box-shadow:0 3px 0 #23335712}
.subjectnav a[aria-current="page"]{background:var(--accent);color:#fff;border-color:var(--accent)}
.rtbar{border-bottom:4px solid #ffc94c;background:#fff}.rtbar a{color:#57309b}.rtbar nav{display:block}
.rtsettings{background:#fff4cf;border:2px solid #e8c05b}.rtsettings summary{color:#634811}
.grid{gap:20px}.topic{position:relative;min-height:168px;border:3px solid #ab8be3;background:#eee3ff;box-shadow:0 6px 0 #ad91d0;text-align:left;padding:22px;transition:transform .15s}
.topic:nth-child(6n+2){background:#d9efff;border-color:#6eafe5;box-shadow:0 6px 0 #88b4d6}
.topic:nth-child(6n+3){background:#ffe3eb;border-color:#e489ac;box-shadow:0 6px 0 #d29aaf}
.topic:nth-child(6n+4){background:#fff1ba;border-color:#d1aa32;box-shadow:0 6px 0 #ccba6a}
.topic:nth-child(6n+5){background:#d5f6e7;border-color:#50af93;box-shadow:0 6px 0 #88bca8}
.topic:nth-child(6n+6){background:#ffe3c8;border-color:#e59c56;box-shadow:0 6px 0 #d4ac84}
.topic-icon{font-size:37px;line-height:1.2}.topic .tag{color:#3b465d}.topic strong{color:#233357}
.panel,.board{border:3px solid var(--edge);background:#fff;border-radius:26px;box-shadow:0 7px 0 #23335710}
.lesson{background:var(--wash);border-left:7px solid var(--accent);color:#233357;padding:22px}
button,select,input{border-color:var(--edge);color:#233357}button{box-shadow:0 3px 0 #23335715}button:not(:disabled):hover{filter:brightness(.97)}
.primary,#next,#gameNext{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 4px 0 #23335725}
.choices .answer,.choices .choice,#choices>.choice{background:#e2edff;border:3px solid #75a6ec;box-shadow:0 5px 0 #9bb9e4;min-height:110px;color:#233357}
.choices .answer:nth-child(3n+2),.choices .choice:nth-child(3n+2),#choices>.choice:nth-child(3n+2){background:#ffe1ee;border-color:#de80ad;box-shadow:0 5px 0 #dca5bf}
.choices .answer:nth-child(3n+3),.choices .choice:nth-child(3n+3),#choices>.choice:nth-child(3n+3){background:#fff0ac;border-color:#c9a22b;box-shadow:0 5px 0 #cdbc79}
.visual:not(:empty),#scene:not(:empty){padding:22px;border-radius:21px;background:var(--wash);border:2px solid var(--edge);line-height:1.8;letter-spacing:3px;text-align:center;font-size:32px}
.feedback,#feedback,#gameFeedback,#nameFeedback{background:#fff4c9;border:2px solid #e4c55e;border-radius:16px;padding:16px;color:#4d421f;line-height:1.5}
progress{accent-color:var(--accent);height:20px;border-radius:20px;overflow:hidden}progress::-webkit-progress-bar{background:#eee8fa;border-radius:20px}progress::-webkit-progress-value{background:linear-gradient(90deg,#8160ce,#248ca9);border-radius:20px}
.tile{background:#e1eaff;border:3px solid #7e9de0;color:#223861;box-shadow:0 4px 0 #abc0eb;min-width:54px;border-radius:14px}
.tile:nth-child(5n+2){background:#ffe0ee;border-color:#da80a9}.tile:nth-child(5n+3){background:#fff0ad;border-color:#c6a234}.tile:nth-child(5n+4){background:#d4f5e6;border-color:#58a98c}.tile:nth-child(5n+5){background:#f0deff;border-color:#ad83cf}
.slot{background:#f3eaff;border:3px dashed #9d78c9;color:#442763;min-width:46px}.slot.active{outline:4px solid #e68b12;outline-offset:3px;background:#fff0a8}.slot.filled{background:#daf3e0;border:3px solid #39845a;color:#224c32}
.memory{gap:16px}.memory button{background:linear-gradient(135deg,#6844b5,#426cc5);border:3px solid #b0a0e4;color:white;box-shadow:0 5px 0 #b8a7d6;font-weight:bold;border-radius:20px;font-size:28px}.memory button:nth-child(even){background:linear-gradient(135deg,#0d797f,#2461b3);border-color:#7ecbc9}
.correct,.answer.correct,.memory button.correct{background:#d5f2dd!important;border:4px solid #247746!important;color:#164627!important;box-shadow:0 4px 0 #83bc91!important}.retry{outline:3px dashed #bb4c19;outline-offset:3px}
.number-trail{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;letter-spacing:0}.trail-step{display:inline-flex;align-items:center;justify-content:center;min-width:72px;min-height:72px;padding:10px;border-radius:22px;background:#fff;border:3px solid #7ca7e0;font-weight:bold;color:#233357}.trail-step:nth-of-type(3){background:#ffe0ee;border-color:#d68daf}.trail-step:nth-of-type(5){background:#dcf4dd;border-color:#6daf76}.trail-step:last-child{background:#ffed9b;border-color:#c2a134}.trail-arrow{color:var(--accent);font-size:28px}
.note,.tip{color:#3e4d64}.note{border:2px solid #ebbd59;background:#fff4cf}.rtsettings input[type=checkbox]{width:auto}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:4px solid #233357!important;outline-offset:4px}
html.rt-calm body{background:#f4f5ef!important;background-image:none!important}html.rt-calm .hero,html.rt-calm .topic,html.rt-calm .answer,html.rt-calm .choice,html.rt-calm .tile,html.rt-calm .slot,html.rt-calm .visual,html.rt-calm .memory button,html.rt-calm .lesson,html.rt-calm .trail-step{background:#edf2e9!important;border-color:#899e91!important;color:#233e3c!important}html.rt-calm .subject-stamp{background:#f4f5ef!important}html.rt-calm .feedback{background:#f4f0df!important}
@media(max-width:680px){.topic{min-height:135px}.subjectnav{gap:8px}.subjectnav a{font-size:15px;padding:8px 10px}.hero,.panel{padding:20px}.visual:not(:empty){font-size:25px;padding:14px}.memory{gap:10px}.trail-step{min-width:52px;min-height:58px;font-size:23px}.number-trail{gap:6px}.choices .answer{min-height:80px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

.topic{background:#ddc7ff}.topic:nth-child(6n+2){background:#b9e3ff}.topic:nth-child(6n+3){background:#ffc5df}.topic:nth-child(6n+4){background:#ffe477}.topic:nth-child(6n+5){background:#a9ecd2}.topic:nth-child(6n+6){background:#ffd0a2}.count-object{display:inline-block;font-size:1.25em;text-shadow:0 2px 0 #ffffff}.subject-stamp{display:flex;width:74px}.choices .answer{background:#cfe2ff}.choices .answer:nth-child(3n+2){background:#ffcde3}.choices .answer:nth-child(3n+3){background:#ffe783}