:root{color-scheme:dark;--bg:#090a14;--surface:#121526;--surface2:#1a1e34;--line:#333854;--ink:#f5f3ff;--muted:#b8b6cb;--gold:#ffc857;--ember:#ff866e;--cyan:#55d8df;--violet:#a58aff;--green:#71dda1;--danger:#ff8092;--shadow:0 18px 55px rgba(0,0,0,.34);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;color:var(--ink);background:var(--bg)}button,input{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.ambient{position:fixed;inset:0;pointer-events:none;background:radial-gradient(circle at 10% 10%,rgba(85,216,223,.1),transparent 28rem),radial-gradient(circle at 86% 22%,rgba(165,138,255,.11),transparent 34rem),radial-gradient(circle,rgba(255,255,255,.38) 1px,transparent 1.4px);background-size:auto,auto,83px 83px;mask-image:linear-gradient(#000,transparent 88%)}
.offline-banner{position:sticky;top:0;z-index:20;padding:8px;text-align:center;color:#111;background:var(--gold);font-weight:700;font-size:.82rem}.app-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;min-height:68px;padding:10px max(16px,env(safe-area-inset-left));border-bottom:1px solid rgba(255,255,255,.08);background:rgba(9,10,20,.9);backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:10px;border:0;background:none;text-align:left;cursor:pointer}.brand span:last-child{display:grid}.brand small{color:var(--muted);font-size:.7rem}.brand-orb{width:30px;height:30px;border:7px solid var(--cyan);border-radius:50%;box-shadow:0 0 22px rgba(85,216,223,.45)}.header-actions{display:flex;align-items:center;gap:9px}.avatar{width:40px;height:40px;border:1px solid var(--line);border-radius:50%;background:var(--surface2);font-weight:800;cursor:pointer}
main{position:relative;z-index:1;width:min(1160px,calc(100% - 28px));margin:auto;padding:30px 0 calc(92px + env(safe-area-inset-bottom))}.view{display:none}.view.active{display:block;animation:enter .25s ease}@keyframes enter{from{opacity:0;transform:translateY(6px)}}.eyebrow{margin:0 0 9px;color:var(--cyan);font-size:.73rem;font-weight:850;letter-spacing:.17em}h1,h2,h3,p{overflow-wrap:anywhere}h1{margin:0;font-size:clamp(2.35rem,10vw,5.4rem);line-height:.98;letter-spacing:-.045em}h2,h3{line-height:1.15}p{line-height:1.58}.button,.back-button,.answer{min-height:46px;padding:11px 16px;border:1px solid transparent;border-radius:12px;font-weight:760;cursor:pointer;transition:transform .16s ease,border-color .16s ease,background .16s ease}.button:hover,.back-button:hover,.answer:hover{transform:translateY(-2px)}.button.primary{color:#090b14;background:linear-gradient(135deg,var(--cyan),#a7f0dc);box-shadow:0 10px 24px rgba(85,216,223,.17)}.button.secondary,.button.subtle,.back-button{border-color:var(--line);background:var(--surface2)}.button.subtle,.back-button{color:var(--muted);background:transparent}.button.compact{min-height:38px;padding:8px 12px}.button.danger{border-color:rgba(255,128,146,.45);color:var(--danger);background:rgba(255,128,146,.08)}.back-button{margin-bottom:24px}
.hero{display:grid;gap:34px;align-items:center;min-height:530px;padding:28px 0 50px}.hero h1 span{color:var(--violet)}.hero-copy{max-width:610px;color:var(--muted);font-size:1.05rem}.hero-actions,.module-actions,.result-actions,.dialog-actions{display:flex;gap:11px;flex-wrap:wrap}.hero-orbit{position:relative;width:min(84vw,380px);aspect-ratio:1;margin:auto}.hero-sun{position:absolute;left:50%;top:50%;width:70px;height:70px;transform:translate(-50%,-50%);border-radius:50%;background:var(--gold);box-shadow:0 0 55px rgba(255,200,87,.54)}.orbit-line{position:absolute;left:50%;top:50%;border:1px solid rgba(165,138,255,.43);border-radius:50%;transform:translate(-50%,-50%) rotate(-18deg)}.orbit-line.one{width:46%;height:28%}.orbit-line.two{width:72%;height:45%}.orbit-line.three{width:100%;height:63%}.orbit-line span{position:absolute;right:-7px;top:50%;width:13px;height:13px;border-radius:50%;background:var(--cyan);box-shadow:0 0 18px var(--cyan)}.campaign-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:12px 0 18px}.campaign-head h2{margin:0;font-size:2rem}.campaign-head>span{color:var(--muted);font-size:.9rem}.mission-grid{display:grid;gap:14px}.mission-card{display:grid;gap:18px;min-height:290px;padding:22px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(155deg,rgba(255,255,255,.045),rgba(255,255,255,.012));box-shadow:var(--shadow)}.mission-card.mastered{border-color:rgba(113,221,161,.6)}.mission-top,.mission-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}.mission-number{color:var(--muted);font-size:.76rem;letter-spacing:.14em}.mission-icon{display:grid;place-items:center;width:55px;height:55px;border-radius:50%;font-size:1.8rem;background:rgba(255,255,255,.05)}.mission-card h3{margin:5px 0 0;font-size:1.42rem}.mission-subtitle{margin:0;color:var(--muted);font-size:.85rem}.mission-meta{padding-top:12px;border-top:1px solid rgba(255,255,255,.07);color:var(--muted);font-size:.78rem}.mission-button{width:100%;border-color:var(--line);background:var(--surface2)}.accent-gold .mission-icon,.accent-gold .eyebrow{color:var(--gold)}.accent-ember .mission-icon,.accent-ember .eyebrow{color:var(--ember)}.accent-cyan .mission-icon,.accent-cyan .eyebrow{color:var(--cyan)}.accent-violet .mission-icon,.accent-violet .eyebrow{color:var(--violet)}.accent-green .mission-icon,.accent-green .eyebrow{color:var(--green)}.exam-card{border-color:rgba(165,138,255,.42);background:linear-gradient(145deg,rgba(165,138,255,.14),rgba(85,216,223,.04))}.calm-mode{display:flex;gap:14px;margin-top:20px;padding:18px;border-left:3px solid var(--cyan);background:rgba(85,216,223,.055)}.calm-mode>span{color:var(--cyan);font-size:1.6rem}.calm-mode strong{display:block}.calm-mode p{margin:4px 0 0;color:var(--muted)}
.module-hero{max-width:830px;margin-bottom:30px}.module-hero h1{font-size:clamp(2.6rem,10vw,5rem)}.module-hero>p:last-child,.page-head>p:last-child{color:var(--muted);font-size:1.06rem}.concept-list{display:grid;gap:10px;margin:28px 0}.concept-list article{display:grid;grid-template-columns:38px 1fr;gap:12px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.09)}.concept-list article>span{color:var(--cyan);font-size:.75rem}.concept-list h2{margin:0;font-size:1.25rem}.concept-list p{margin:7px 0 0;color:var(--muted)}.memory-key{display:flex;gap:14px;margin:28px 0;padding:20px;border-radius:16px;background:linear-gradient(90deg,rgba(165,138,255,.14),rgba(85,216,223,.07))}.memory-key>span{color:var(--gold);font-size:1.7rem}.memory-key strong{display:block}.memory-key p{margin:5px 0 0}.solar-map{display:flex;align-items:flex-end;gap:15px;min-height:225px;padding:32px 14px 22px;overflow-x:auto;border-bottom:2px solid rgba(255,255,255,.12)}.sun-dot{flex:0 0 76px;width:76px;height:76px;border-radius:50%;background:var(--gold);box-shadow:0 0 40px rgba(255,200,87,.5)}.planet-node{display:grid;justify-items:center;min-width:58px;gap:8px;color:var(--muted);font-size:.7rem}.planet-node i{display:block;width:var(--s,18px);height:var(--s,18px);border-radius:50%;background:var(--c,#aaa);box-shadow:0 0 15px color-mix(in srgb,var(--c) 34%,transparent)}.p1{--s:13px;--c:#aaa}.p2{--s:20px;--c:#d9a45b}.p3{--s:21px;--c:#5aa8df}.p4{--s:17px;--c:#c7664d}.p5{--s:48px;--c:#d2a575}.p6{--s:41px;--c:#e3c57d}.p7{--s:31px;--c:#73cbd2}.p8{--s:30px;--c:#5e80d9}.world-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:28px 0}.world-strip>div{display:grid;justify-items:center;gap:6px;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.world-strip span{color:var(--muted);font-size:.78rem}.world{display:block;width:62px;height:62px;border-radius:50%;background:var(--c)}.w1{--c:#aaa}.w2{--c:#d9a45b}.w3{--c:#5aa8df}.w4{--c:#c7664d}.w5{--c:#d2a575}.w6{--c:#e3c57d;box-shadow:0 0 0 8px rgba(227,197,125,.15)}.w7{--c:#73cbd2}.w8{--c:#5e80d9}.kepler-lab,.gravity-lab{margin:30px 0;padding:20px;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:var(--shadow)}.ellipse{position:relative;width:min(100%,620px);height:220px;margin:auto;border:2px solid rgba(165,138,255,.55);border-radius:50%}.lab-sun{position:absolute;left:27%;top:50%;width:50px;height:50px;transform:translate(-50%,-50%);border-radius:50%;background:var(--gold);box-shadow:0 0 30px rgba(255,200,87,.5)}.empty-focus{position:absolute;right:27%;top:50%;width:9px;height:9px;transform:translate(50%,-50%);border-radius:50%;background:var(--violet)}.orbiting-planet{position:absolute;width:20px;height:20px;transform:translate(-50%,-50%);border-radius:50%;background:var(--cyan);box-shadow:0 0 17px var(--cyan)}.lab-readout{display:flex;justify-content:center;gap:9px;margin:15px 0;color:var(--muted)}.lab-readout strong{color:var(--ink)}.kepler-lab input,.lab-controls input{width:100%;accent-color:var(--cyan)}.gravity-stage{display:flex;align-items:center;justify-content:center;gap:var(--distance-gap,70px);min-height:170px}.mass{flex:0 0 auto;width:var(--mass-size,62px);height:var(--mass-size,62px);border-radius:50%}.mass-a{background:var(--violet);box-shadow:0 0 30px rgba(165,138,255,.36)}.mass-b{background:var(--cyan);box-shadow:0 0 30px rgba(85,216,223,.36)}.force-line{width:85px;height:3px;background:linear-gradient(90deg,var(--violet),var(--cyan))}.lab-controls{display:grid;gap:16px}.lab-controls label{display:grid;grid-template-columns:1fr auto;gap:8px;color:var(--muted)}.lab-controls input{grid-column:1/-1}.force-value{text-align:center;margin-top:20px;color:var(--muted)}.force-value strong{display:block;color:var(--gold);font-size:1.7rem}
.practice-wrap{max-width:820px;margin:auto}.practice-header{display:flex;align-items:end;justify-content:space-between;gap:16px}.practice-header h1{font-size:clamp(2.1rem,9vw,4rem)}.fragment-counter{color:var(--gold);text-align:center}.fragment-counter span{display:block;font-size:1.8rem;font-weight:850}.fragment-counter small{font-size:.7rem}.progress-track{height:7px;margin:22px 0;overflow:hidden;border-radius:99px;background:rgba(255,255,255,.09)}.progress-track>div{height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--violet));transition:width .3s ease}.question-card{padding:22px;border:1px solid var(--line);border-radius:20px;background:rgba(18,21,38,.94);box-shadow:var(--shadow)}.question-number,.question-context{color:var(--muted);font-size:.78rem}.question-card h2{min-height:56px;font-size:clamp(1.3rem,6vw,2rem)}.answer-list{display:grid;gap:10px;margin:20px 0}.answer{text-align:left;border-color:var(--line);background:var(--surface2)}.answer.correct{border-color:var(--green);color:var(--green);background:rgba(113,221,161,.08)}.answer.wrong{border-color:var(--danger);color:var(--danger);background:rgba(255,128,146,.06)}.answer:disabled{cursor:default;transform:none}.question-hint{min-height:25px;color:var(--gold)}.feedback{min-height:50px;color:var(--muted)}.feedback.correct-text{color:var(--green)}.question-actions{display:flex;justify-content:space-between;gap:10px}.result-panel{max-width:680px;margin:4vh auto;padding:28px;text-align:center;border:1px solid var(--line);border-radius:24px;background:var(--surface);box-shadow:var(--shadow)}.result-symbol{display:grid;place-items:center;width:100px;height:100px;margin:0 auto 22px;border-radius:50%;color:var(--gold);background:rgba(255,200,87,.08);font-size:3rem;box-shadow:0 0 36px rgba(255,200,87,.16)}.result-panel h1{font-size:clamp(2.3rem,9vw,4rem)}.result-panel>p:not(.eyebrow){color:var(--muted)}.result-breakdown{margin:24px 0;text-align:left}.result-breakdown>strong{display:block;margin-bottom:8px}.result-breakdown>div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.08)}.result-breakdown b{color:var(--muted);font-size:.78rem}.result-actions{justify-content:center}
.page-head{max-width:720px;margin-bottom:28px}.page-head h1{font-size:clamp(2.6rem,10vw,5rem)}.progress-overview{display:grid;gap:12px;margin-bottom:25px}.progress-overview article{padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}.progress-overview span,.progress-overview p{color:var(--muted)}.progress-overview strong{display:block;margin:8px 0;font-size:2.1rem}.progress-overview p{margin:0;font-size:.8rem}.progress-list{display:grid;gap:9px}.progress-list>article,.danger-zone{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px;border-bottom:1px solid rgba(255,255,255,.09)}.progress-list>article>div:first-child{display:flex;align-items:center;gap:12px}.progress-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--surface2)}.progress-list h3,.progress-list p,.danger-zone p{margin:0}.progress-list p,.danger-zone p{color:var(--muted);font-size:.78rem}.module-score{text-align:right}.module-score strong,.module-score span{display:block}.module-score span{color:var(--muted);font-size:.7rem}.danger-zone{margin-top:28px;border:1px solid rgba(255,128,146,.2);border-radius:16px;background:rgba(255,128,146,.03)}dialog{max-width:min(440px,calc(100% - 28px));padding:24px;border:1px solid var(--line);border-radius:18px;color:var(--ink);background:var(--surface);box-shadow:var(--shadow)}dialog::backdrop{background:rgba(0,0,0,.7)}dialog p{color:var(--muted)}
.bottom-nav{position:fixed;z-index:12;left:12px;right:12px;bottom:max(10px,env(safe-area-inset-bottom));display:grid;grid-template-columns:1fr 1fr;padding:7px;border:1px solid var(--line);border-radius:17px;background:rgba(18,21,38,.94);backdrop-filter:blur(14px);box-shadow:var(--shadow)}.bottom-nav button{display:grid;justify-items:center;gap:2px;min-height:48px;border:0;border-radius:12px;color:var(--muted);background:transparent;font-size:.7rem;cursor:pointer}.bottom-nav button span{font-size:1.15rem}.bottom-nav button.active{color:var(--ink);background:var(--surface2)}
@media(min-width:700px){main{padding-top:52px}.hero{grid-template-columns:1.2fr .8fr}.mission-grid{grid-template-columns:repeat(2,1fr)}.world-strip{grid-template-columns:repeat(4,1fr)}.lab-controls{grid-template-columns:repeat(3,1fr)}.answer-list{grid-template-columns:repeat(2,1fr)}.question-card,.result-panel{padding:38px}.progress-overview{grid-template-columns:repeat(3,1fr)}.bottom-nav{display:none}.app-header{padding-inline:max(28px,calc((100vw - 1160px)/2))}}
@media(min-width:1020px){.mission-grid{grid-template-columns:repeat(3,1fr)}.concept-list{grid-template-columns:repeat(2,1fr)}.concept-list article{padding:22px}.mission-card{min-height:305px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.hero-orbit{width:min(84vw,340px)}
.hero{overflow:hidden}