.learning-scorebar{grid-template-columns:repeat(3,1fr)}.learning-shell{--cube-size:clamp(170px,45vw,250px)}
.lesson-guide{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px;margin-bottom:8px;border:1px solid #705a2c;border-radius:15px;padding:11px 13px;background:linear-gradient(120deg,#171d29,#090c13 72%);box-shadow:inset 0 1px #fff1}.lesson-guide h2{margin:0;color:#f4dda0;font:normal 21px Georgia,serif}.lesson-guide p:not(.eyebrow){margin:5px 0 0;color:#bdb29e;font-size:11px;line-height:1.45}.lesson-next-move{display:grid;min-width:78px;justify-items:center;border-left:1px solid #4f4022;padding-left:13px}.lesson-next-move span{color:#9e927c;font-size:7px;font-weight:900;letter-spacing:.12em}.lesson-next-move strong{margin-top:3px;color:#ffe5a0;font:normal 28px Georgia,serif}.learning-stage{min-height:550px}.learning-message{position:absolute;z-index:7;top:8px;left:50%;width:min(calc(100% - 28px),560px);margin:0;transform:translateX(-50%);color:#d9cda9;font-size:11px;line-height:1.35;text-align:center}.lesson-control-focus{animation:lesson-control-pulse .9s ease-in-out infinite;border-color:#fff1aa!important;background:linear-gradient(145deg,#b9862d,#efd77d)!important;color:#080705!important;box-shadow:0 0 18px #ffd665aa!important}@keyframes lesson-control-pulse{50%{transform:scale(.9);filter:brightness(1.18)}}.lesson-list{display:grid;gap:8px}.lesson-choice{display:grid;grid-template-columns:38px 1fr auto;align-items:center;gap:10px;width:100%;border:1px solid #554521;border-radius:12px;padding:10px;background:#090d15;color:#eee0b6;text-align:left}.lesson-choice.current{border-color:#efd88f;background:#211a0e}.lesson-choice-number{display:grid;width:32px;height:32px;place-items:center;border:1px solid #80662f;border-radius:50%;color:#ffe5a0}.lesson-choice b,.lesson-choice small{display:block}.lesson-choice small{margin-top:3px;color:#9f9583;font-size:9px}.lesson-choice-state{color:#d4b65f;font-size:16px}.learning-back-link{width:100%;margin-top:14px}.learning-complete{color:#fff0a7!important}.learning-complete+.lesson-next-move strong{font-size:20px}
@media(max-width:520px){.learning-shell{--cube-size:clamp(158px,49vw,192px)}.lesson-guide{margin-inline:0;padding:7px 8px 7px 10px}.lesson-guide h2{font-size:17px}.lesson-next-move{min-width:60px;padding-left:8px}.lesson-explain-button{width:32px;height:32px}.learning-stage{min-height:475px}.learning-stage .cube-viewport{--cube-center-y:33%;height:450px}.learning-message{top:4px;font-size:9px}}
.reset-progress-button{width:100%;margin-top:12px}
.lesson-guide{position:relative;padding-block:8px}.lesson-guide p:not(.eyebrow){display:none}.lesson-guide-actions{display:flex;align-items:center;gap:9px}.lesson-explain-button{width:34px;height:34px;font:italic bold 16px Georgia,serif}.learning-stage{min-height:500px}.learning-stage .cube-viewport{--cube-center-y:34%;height:475px}.lesson-guide .learning-message{display:block;position:absolute;z-index:20;bottom:calc(100% + 9px);top:auto;left:50%;width:max-content;max-width:min(290px,calc(100vw - 32px));margin:0;padding:9px 14px;transform:translate(-50%,7px) scale(.96);border:1px solid #e0bd63;border-radius:13px;background:linear-gradient(145deg,#2a2111,#100d08);box-shadow:0 8px 24px #000a,0 0 18px #d7a93644;color:#fff0ba;font-size:13px;font-weight:800;line-height:1.25;text-align:center;opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease}.lesson-guide .learning-message::after{content:"";position:absolute;top:100%;left:50%;width:10px;height:10px;transform:translate(-50%,-5px) rotate(45deg);border-right:1px solid #e0bd63;border-bottom:1px solid #e0bd63;background:#171006}.lesson-guide .learning-message.is-visible{transform:translate(-50%,0) scale(1);opacity:1}.lesson-guide .learning-message[hidden]{display:none}.lesson-control-focus{animation-duration:.72s}@keyframes lesson-control-pulse{0%,100%{filter:brightness(.88);box-shadow:0 0 6px #ffd66555}50%{transform:scale(.9);filter:brightness(1.38);box-shadow:0 0 24px #ffe58aee}}.lesson-explanation-card p,.lesson-explanation-card li{color:#c9bfac;font-size:13px;line-height:1.65}.lesson-explanation-card ol{display:grid;gap:9px;margin:0;padding-left:22px}.notation-sequence{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}.notation-token{display:grid;min-width:38px;height:38px;place-items:center;border:1px solid #a98539;border-radius:9px;background:linear-gradient(145deg,#222b3b,#090c12);color:#ffe4a0;font:normal 20px Georgia,serif}.lesson-tip{border-color:#96743a;background:#161207cc}.explanation-close{width:100%;margin-top:14px}
@media(max-width:520px){.learning-stage{min-height:475px}.learning-stage .cube-viewport{--cube-center-y:33%;height:450px}}
.lesson-guide .learning-message{display:block!important}.lesson-guide .learning-message[hidden]{display:none!important}
.lesson-guide .learning-message{max-width:min(340px,calc(100vw - 28px));padding:12px 19px;border-color:#fff;border-radius:16px;background:#fff;box-shadow:0 9px 28px #000b,0 0 14px #ffffff55;color:#08090c!important;font-size:16px!important;font-weight:900!important;line-height:1.25!important}.lesson-guide .learning-message::after{border-color:#fff;background:#fff}
.lesson-explanation-card .notation-sequence{display:grid;gap:7px}.lesson-explanation-card .notation-token{display:grid;grid-template-columns:30px minmax(0,1fr);width:100%;height:auto;min-height:42px;padding:7px 10px;text-align:left}.lesson-explanation-card .notation-token b{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;background:#d7b85f;color:#090a0d;font:900 12px Arial,sans-serif}.lesson-explanation-card .notation-token span{align-self:center;color:#f5e5b5;font:700 13px Arial,sans-serif;line-height:1.35}