.brand-logo-cyber img{width:100%;height:100%;object-fit:cover;border-radius:13px}
.byte-hero-button{padding:0;border:1px solid #05d5b388;border-radius:32px;background:#0d1527;cursor:pointer;overflow:hidden;box-shadow:0 0 50px #05d5b322;max-width:100%}
.byte-hero{display:block;width:min(390px,100%);height:auto;aspect-ratio:1;object-fit:cover}
.byte-avatar{width:90px;height:90px;border-radius:20px;object-fit:cover;border:2px solid #05d5b3;max-width:100%}
.byte-demo{display:block;width:170px;height:170px;object-fit:cover;border-radius:24px;margin:0 auto 10px}
#demo-expression{display:block;font-size:1rem;color:#00f2fe}.byte-sprite{width:44px;height:44px;border-radius:12px;object-fit:cover;border:2px solid #00f2fe;vertical-align:middle}.byte-celebrate{animation:byte-pop .65s ease}
@keyframes byte-pop{50%{transform:scale(1.06);filter:brightness(1.2)}}
.progress-card{padding:24px;border:1px solid #05d5b355;background:linear-gradient(120deg,#132d38,#131f38);border-radius:20px;margin-bottom:24px;display:grid;gap:14px}.progress-card>div{display:flex;justify-content:space-between;gap:12px}.progress-card progress{width:100%;height:12px;accent-color:#05d5b3}.progress-card .quest-play-btn{max-width:230px}.quest-card.completed{border-color:#10b981}.quest-card.completed .quest-num::after{content:' ✓'}.nav-btn.completed{box-shadow:inset 0 -2px #10b981}
.stage-stack{display:flex;flex-direction:column;align-items:center;gap:14px;width:100%;text-align:center}.stage-track{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;direction:ltr}.maze-grid{direction:ltr}.maze-cell{position:relative}.maze-cell .byte-sprite{width:90%;height:90%;max-width:44px}.maze-cell .direction{position:absolute;bottom:-2px;right:0;font-size:14px;background:#070b14;border-radius:5px;color:#facc15}.stage-note{font-size:.85rem;color:#cbd5e1;line-height:1.8}.code-row{display:flex;align-items:center;gap:4px;margin:6px 0}.code-row>.scratch-block{flex:1;cursor:grab;white-space:normal}.code-tool{background:#1e293b;border:1px solid #475569;color:white;border-radius:7px;min-width:32px;min-height:32px;cursor:pointer}.executing{outline:3px solid #facc15;box-shadow:0 0 20px #facc1544}.nested{margin-inline-start:24px;border-inline-start:3px solid #ffab19;padding-inline-start:8px}.control-caption{font-size:.75rem;color:#94a3b8;margin:4px}.scratch-block{border:0;font:inherit;text-align:right}button:focus-visible,[tabindex]:focus-visible{outline:3px solid #facc15;outline-offset:4px}button:disabled{opacity:.45;cursor:not-allowed}.sim-stage{height:auto;min-height:260px;padding:20px;overflow:hidden}.gate-box{border:2px solid #f43f5e;padding:20px;border-radius:18px;min-width:130px;background:#132039}.gate-box.open{border-color:#10b981;box-shadow:0 0 25px #10b98144}.collected{opacity:.35;transform:scale(.8)}.jump-track{direction:ltr;display:flex;justify-content:space-between;align-items:end;width:min(360px,100%);height:140px;position:relative;border-bottom:3px solid #f43f5e}.jump-track::after{content:'⚡ ⚡ ⚡';position:absolute;left:30%;bottom:5px;color:#f43f5e}.jump-track .byte-sprite{width:60px;height:60px}.jump-track #ch6-bot{position:relative;z-index:1}.city-lit{box-shadow:0 0 35px #05d5b388}.energy-bar-wrap{max-width:45vw}.code-assembly-area{max-height:440px;overflow:auto}.arena-action-row{flex-wrap:wrap}.feedback-banner{line-height:1.8}
@media(max-width:600px){header{padding:10px;gap:10px;flex-wrap:wrap}.brand-names h1{font-size:1rem}.app-play-stage{padding:12px}.half-screen{min-width:0}.byte-avatar-card{flex-direction:column}.hero-robot-box{width:100%}.byte-hero{width:100%}.chapter-header-badge,.challenge-header{flex-wrap:wrap}.maze-cell{width:44px;height:44px}.maze-grid{grid-template-columns:repeat(5,44px)}.stage-track{gap:6px}.progress-card>div{flex-direction:column}.play-footer-nav{padding:10px;gap:8px;flex-wrap:wrap}.sound-toggle-btn{white-space:normal}.story-panel,.challenge-panel{padding:16px}.quest-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:600px){.main-nav-links{width:100%;display:flex;flex-wrap:wrap;justify-content:center;gap:6px}.main-nav-links .nav-btn{font-size:.78rem;padding:8px}}
[hidden]{display:none!important}
.byte-portrait{background-image:url('assets/byte-expressions.png');background-size:200% 200%;background-repeat:no-repeat;aspect-ratio:1;transition:box-shadow .2s ease;flex-shrink:0}
.byte-portrait[data-mood="happy"]{background-position:0 0}.byte-portrait[data-mood="curious"]{background-position:100% 0}.byte-portrait[data-mood="thinking"]{background-position:0 100%}.byte-portrait[data-mood="super"]{background-position:100% 100%;box-shadow:0 0 30px #00f2fe55}
.byte-demo{width:230px;height:230px;max-width:100%;border:1px solid #05d5b366}.byte-avatar{width:116px;height:116px}.byte-sprite{object-fit:contain;border:0;border-radius:0;width:58px;height:68px;filter:drop-shadow(0 0 5px #00f2fe55)}.maze-cell .byte-sprite{object-fit:contain;width:100%;height:100%;max-width:none}.jump-track .byte-sprite{height:80px;width:65px}
.skill-lesson{border:1px solid #05d5b355;border-radius:16px;padding:16px;background:linear-gradient(140deg,#102d33,#101b31);font-size:.93rem;line-height:1.9}.skill-lesson summary{cursor:pointer;font-weight:800;color:#7af5df;font-size:1.05rem}.skill-lesson p{margin-top:12px;color:#d9e6ef}.lesson-example{padding:12px;border-radius:10px;background:#070b1466;margin-top:14px;border-inline-start:3px solid #facc15}.lesson-example strong{color:#facc15}.lesson-example p{margin-top:3px}
.activity-heading{display:flex;justify-content:space-between;gap:8px;font-size:.9rem;color:#00f2fe}.activity-heading span{color:#94a3b8}.activity-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0 18px}.activity-tab{border:1px solid #334155;color:#bdcbdc;background:#101c31;border-radius:12px;padding:12px 8px;font:inherit;font-size:.82rem;line-height:1.6;cursor:pointer}.activity-tab.active{border-color:#05d5b3;background:#05d5b322;color:#8af4e1}.activity-count{font-size:.85rem;color:#00f2fe;margin:12px 0}.mini-game{width:100%;max-width:600px;display:grid;gap:14px}.mini-game-intro{display:flex;align-items:center;gap:16px;text-align:right;color:#f8fafc;font-weight:800}.mini-game-intro .byte-sprite{width:75px;height:85px}.mini-game-intro small{display:block;color:#94a3b8;font-weight:400;font-size:.8rem;margin-top:6px}.mini-order-list{display:grid;gap:8px}.mini-order-row{display:flex;gap:8px;align-items:center;background:#1b3048;border:1px solid #35516b;padding:12px;border-radius:12px;text-align:right}.mini-order-row span{flex:1}.field-label{display:grid;gap:8px;text-align:right;font-size:.9rem;color:#d7e5f4;line-height:1.7}.field-label input,.field-label select{width:100%;min-width:0;min-height:44px;padding:10px;background:#0e1b2e;border:1px solid #45617e;border-radius:10px;color:#f8fafc;font:inherit;font-size:.9rem}.field-label input:focus,.field-label select:focus{outline:2px solid #05d5b3}.mini-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.mini-output{padding:14px;background:#070b1488;border:1px solid #05d5b344;border-radius:12px;color:#9ce9d7;font-size:.86rem;line-height:1.9;max-height:340px;overflow:auto;text-align:right}.trace-item{padding:5px;border-bottom:1px solid #ffffff0c}.pattern-target{background:#182c45;padding:12px;border-radius:12px;font-size:.9rem}.pattern-target>div{display:flex;gap:8px;flex-wrap:wrap;direction:ltr;justify-content:center;font-size:1.3rem;margin-top:8px}.mini-game .stage-note{margin:0}.sim-stage:has(.mini-game){min-height:300px}.activity-tab:hover{border-color:#00f2fe}
@media(max-width:600px){.activity-tabs{grid-template-columns:1fr}.activity-tab{text-align:right;padding:10px}.mini-form-grid{grid-template-columns:1fr}.byte-avatar{width:130px;height:130px}.mini-order-row{padding:10px;gap:5px;font-size:.85rem}.skill-lesson{padding:14px}.sim-stage{padding:14px}.activity-heading{flex-wrap:wrap}}
.byte-demo{width:min(230px,100%);height:auto;aspect-ratio:1}.byte-card-showcase>*{min-width:0}
@media(max-width:600px){.byte-card-showcase{grid-template-columns:minmax(0,1fr);padding:16px}.byte-feature-pill{padding:12px}.byte-feature-pill>div:last-child{min-width:0}}