:root{--ink:#10162f;--paper:#f7f3dd;--yellow:#fec71e;--blue:#2c8cf4;--white:#fff;--shadow:#080b19;--accent:#ff4d62;--step-color:#ff5265}
*{box-sizing:border-box}
html{width:100%;height:100%;scroll-behavior:smooth}
body{margin:0;width:100%;height:100vh;height:100dvh;min-height:100vh;overflow:hidden;display:grid;grid-template-rows:72px minmax(0,1fr) 78px 30px;background:linear-gradient(#3199ff 0 48%,#1d6bc0 48% 55%,#142042 55%);color:var(--white);font-family:"Trebuchet MS","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
button,a{font:inherit}.scanlines{position:fixed;inset:0;z-index:20;pointer-events:none;opacity:.12;background:repeating-linear-gradient(0deg,transparent 0 3px,#02040a 4px)}
.sky-pixels{position:fixed;inset:0;pointer-events:none;background:radial-gradient(circle at 12% 18%,#fff 0 2%,transparent 2.2%),radial-gradient(circle at 82% 15%,#ffe169 0 7%,transparent 7.2%),linear-gradient(90deg,transparent 48%,rgba(255,255,255,.08) 49% 51%,transparent 52%);background-size:360px 220px,100% 100%,24px 24px;opacity:.55}
.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(18px,4vw,64px);position:relative;z-index:30;background:rgba(12,18,43,.88);border-bottom:4px solid #050817;box-shadow:0 4px 0 rgba(255,255,255,.12)}
.brand{display:flex;align-items:center;gap:12px;color:#fff;text-decoration:none;font-weight:900;letter-spacing:.08em;font-size:.9rem}.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:var(--yellow);color:var(--ink);border:3px solid #fff;box-shadow:4px 4px 0 #000}.top-actions{display:flex;align-items:center;gap:12px}.level-label{font-weight:900;color:var(--yellow);letter-spacing:.1em}.icon-btn,.nav-btn{border:3px solid #fff;background:#222d55;color:#fff;box-shadow:4px 4px 0 #060913;cursor:pointer}.icon-btn{width:44px;height:42px;font-size:1.2rem}.icon-btn[aria-pressed="false"]{opacity:.5}
.game-shell{position:relative;width:100%;height:100%;max-width:none;margin:0;min-height:0;z-index:5}.stage{position:absolute;inset:0;display:grid;align-items:center;padding:clamp(18px,3vw,46px);opacity:0;visibility:hidden;transform:translateX(70px) scale(.98);transition:opacity .38s ease,transform .55s cubic-bezier(.2,.85,.25,1),visibility .38s}.stage.is-active{opacity:1;visibility:visible;transform:none}.stage.exit-left{transform:translateX(-70px) scale(.98)}
.cover-stage{grid-template-columns:minmax(0,1.15fr) minmax(340px,.85fr);gap:clamp(24px,4vw,64px)}.pixel-frame{border:6px solid #090d20;box-shadow:0 0 0 4px #fff,12px 12px 0 rgba(7,10,25,.7);background:#11182f}.cover-art{position:relative;overflow:hidden;transform:rotate(-1deg)}.cover-art img,.lesson-art img{width:100%;height:auto;display:block}.floating-coin{position:absolute;display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--yellow);color:#6b3b00;border:4px solid #fff;box-shadow:4px 4px 0 #000;font-size:1.25rem;animation:float 1.8s ease-in-out infinite}.coin-one{top:12%;right:5%}.coin-two{left:6%;bottom:10%;animation-delay:.7s}.eyebrow,.level{font-weight:900;letter-spacing:.12em;color:var(--yellow);margin:0 0 12px}.cover-copy h1{font-size:clamp(2.5rem,5.5vw,5.7rem);line-height:.98;margin:0;text-shadow:6px 6px 0 #111}.cover-copy h1 span{color:var(--yellow)}.cover-copy>p:not(.eyebrow){font-size:clamp(1rem,1.4vw,1.25rem);line-height:1.75;max-width:650px;color:#e6ecff}.pixel-btn{display:inline-flex;align-items:center;justify-content:space-between;gap:26px;min-width:230px;padding:16px 18px;margin-top:14px;border:4px solid #fff;text-decoration:none;cursor:pointer;font-weight:900;box-shadow:7px 7px 0 #080b18;transition:transform .15s,box-shadow .15s}.pixel-btn:hover,.pixel-btn:focus-visible{transform:translate(-2px,-2px);box-shadow:10px 10px 0 #080b18}.pixel-btn:active{transform:translate(5px,5px);box-shadow:2px 2px 0 #080b18}.primary{background:var(--yellow);color:var(--ink)}.secondary{background:#29365f;color:#fff}.course-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.course-meta span{padding:8px 10px;background:rgba(10,15,35,.75);border:2px solid rgba(255,255,255,.35);font-size:.88rem;font-weight:800}
.lesson-stage{--step-color:#ff5265}.lesson-card{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);align-items:center;gap:clamp(30px,5vw,80px);width:min(1220px,100%);margin:auto}.lesson-art{overflow:hidden;position:relative}.lesson-art:after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 4px var(--step-color);pointer-events:none}.lesson-copy{background:rgba(12,18,43,.92);border:5px solid var(--step-color);box-shadow:10px 10px 0 #050817;padding:clamp(25px,4vw,50px);position:relative}.lesson-copy:before{content:"";position:absolute;width:20px;height:20px;right:16px;top:16px;background:var(--step-color);box-shadow:-28px 0 0 var(--step-color)}.lesson-copy h2{font-size:clamp(1.44rem,3vw,3rem);line-height:1.03;margin:0 0 18px;text-shadow:5px 5px 0 #050817}.lesson-copy>p:not(.level){font-size:clamp(1rem,1.5vw,1.2rem);line-height:1.7;color:#e4eaff}.lesson-copy ul{padding:0;margin:22px 0 0;list-style:none;display:grid;gap:10px}.lesson-copy li{background:#1e294f;padding:11px 14px;border-left:6px solid var(--step-color);font-weight:800}.theme-red{--step-color:#f0525f}.theme-blue{--step-color:#338dea}.theme-green{--step-color:#36b85f}.theme-orange{--step-color:#ec8733}.theme-purple{--step-color:#8851e9}.theme-yellow{--step-color:#f5b915}.theme-cyan{--step-color:#29c6c9}.theme-pink{--step-color:#eb4b97}.theme-sky{--step-color:#3aa8e5}.theme-final{--step-color:#27c776}.theme-final .lesson-copy h2{font-size:clamp(1.29rem,2.52vw,2.52rem)}
.course-link-grid{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:22px}.course-link{min-width:0;margin-top:0;padding:11px 12px;gap:10px;font-size:.8rem}.course-link b{white-space:nowrap}.course-link-gold{background:var(--yellow);color:var(--ink)}.course-link-blue{background:#2c8cf4;color:#fff}.course-link-green{background:#27c776;color:#071b15}.finish-course-links{margin:12px auto 8px;max-width:760px}
.finish-stage{padding:0;text-align:center;overflow:hidden}.finish-panel{width:100%;height:100%;margin:0;padding:clamp(18px,2.4vh,30px) clamp(18px,4vw,64px);border:0;box-shadow:inset 0 0 0 5px #090d20;background:linear-gradient(145deg,#16214c,#0b1028);position:relative;overflow-y:auto;display:flex;flex-direction:column;align-items:center;justify-content:center}.finish-panel:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 15%,rgba(254,199,30,.18) 0 3%,transparent 3.4%);background-size:80px 80px}.finish-panel>.level{position:relative;margin-bottom:8px}.trophy{position:relative;margin:0 auto 10px;display:grid;place-items:center;width:68px;height:68px;flex:0 0 auto;background:var(--yellow);color:#9a5700;border:5px solid #fff;box-shadow:6px 6px 0 #000;font-size:2.3rem;animation:float 1.6s ease-in-out infinite}.finish-panel h2{position:relative;font-size:clamp(2rem,3.6vw,3.8rem);line-height:1;margin:8px 0}.finish-panel>p:not(.level){position:relative;max-width:720px;margin:10px auto;line-height:1.5;color:#e8edff}.price-tag{position:relative;display:inline-grid;gap:0;background:var(--yellow);color:var(--ink);border:4px solid #fff;box-shadow:6px 6px 0 #000;padding:7px 24px;margin:4px auto 8px}.price-tag small{font-weight:900;letter-spacing:.15em}.price-tag strong{font-size:1.8rem;line-height:1}.price-tag span{font-size:.76rem;font-weight:800}.finish-actions{position:relative;display:flex;justify-content:center;flex-wrap:wrap;gap:12px}.finish-actions .pixel-btn{margin-top:8px;padding-top:11px;padding-bottom:11px}
.game-nav{height:78px;position:relative;z-index:30;display:grid;grid-template-columns:auto minmax(150px,660px) auto;align-items:center;justify-content:center;gap:20px;padding:10px clamp(16px,4vw,60px);background:#10162f;border-top:5px solid #070a18}.nav-btn{height:48px;min-width:54px;padding:0 18px;font-weight:900}.nav-btn:disabled{opacity:.28;cursor:not-allowed}.next-btn{background:var(--yellow);color:var(--ink);border-color:#fff}.progress-wrap{display:grid;gap:8px}.progress-track{height:14px;background:#050817;border:3px solid #fff;box-shadow:3px 3px 0 #000}.progress-track span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--yellow),#ff5e64);transition:width .45s ease}.step-dots{display:flex;justify-content:space-between;gap:5px}.step-dots button{width:11px;height:11px;padding:0;border:2px solid #dbe4ff;background:#33416d;cursor:pointer}.step-dots button.is-done{background:var(--yellow)}.step-dots button.is-current{transform:scale(1.5);background:#ff5e64}
.site-footer{position:relative;z-index:30;display:grid;place-items:center;height:30px;padding:0 14px;background:#070a18;color:#cbd5f5;border-top:2px solid rgba(255,255,255,.12);font-size:.72rem;font-weight:700;letter-spacing:.035em;text-align:center;white-space:nowrap}
.toast{position:fixed;z-index:50;left:50%;top:82px;transform:translate(-50%,-120px);background:var(--yellow);color:var(--ink);padding:11px 24px;border:4px solid #fff;box-shadow:6px 6px 0 #000;font-weight:1000;letter-spacing:.14em;transition:transform .35s cubic-bezier(.2,1.5,.4,1)}.toast.show{transform:translate(-50%,0)}#confetti{position:fixed;inset:0;pointer-events:none;z-index:40;width:100%;height:100%}
@keyframes float{50%{transform:translateY(-12px) rotate(3deg)}}
@media(max-width:900px){body{height:100dvh;min-height:100dvh;overflow:hidden;grid-template-rows:64px minmax(0,1fr) 74px 32px}.topbar{height:64px}.brand span:last-child{display:none}.game-shell{height:100%;min-height:0}.stage{overflow-y:auto;padding:22px 18px 32px}.lesson-card{grid-template-columns:1fr}.cover-stage{display:block;padding:20px 18px 32px}.cover-art{width:min(94%,560px);max-width:560px;margin:auto;position:relative;z-index:1}.coin-two{display:none}.cover-copy{position:relative;z-index:3;width:min(100%,620px);margin:22px auto 0;overflow:visible;text-align:center}.cover-copy>p{margin-left:auto;margin-right:auto}.cover-copy>p:not(.eyebrow){display:block;width:100%;font-size:1.2rem;line-height:1.45;margin-top:16px;padding:12px;background:rgba(12,18,43,.78)}.course-meta{justify-content:center}.lesson-card{gap:22px;align-content:center}.lesson-art{width:min(100%,620px);margin:auto}.lesson-copy{width:min(100%,620px);margin:auto;padding:25px}.lesson-copy h2,.theme-final .lesson-copy h2{font-size:clamp(1.14rem,4.8vw,1.32rem);white-space:nowrap;letter-spacing:-.025em}.course-link-grid{grid-template-columns:1fr}.course-link{font-size:.92rem}.game-nav{position:fixed;left:0;right:0;bottom:32px;height:74px;grid-template-columns:auto 1fr auto;gap:10px}.progress-wrap{max-width:none}.next-btn{font-size:0;min-width:54px}.next-btn:after{content:"▶";font-size:1rem}.step-dots{display:none}.toast{display:none}.site-footer{position:fixed;left:0;right:0;bottom:0;height:32px;font-size:.68rem}}
@media(max-width:900px),(max-height:820px){.finish-panel{justify-content:flex-start}}
@media(max-width:520px){.cover-stage{display:block;padding:16px 18px 24px}.cover-art{width:94%}.cover-copy{margin-top:20px}.cover-copy .eyebrow{margin-bottom:8px}.cover-copy h1{font-size:2rem;line-height:1.02}.cover-copy>p:not(.eyebrow){font-size:1.1rem;line-height:1.45;margin-top:14px;padding:10px}.cover-copy .pixel-btn{margin-top:10px}.course-meta{gap:8px;margin-top:16px}.course-meta span{font-size:.75rem}.lesson-copy{border-width:4px}.lesson-copy h2,.theme-final .lesson-copy h2{font-size:clamp(1.14rem,4.8vw,1.32rem);letter-spacing:-.025em}.lesson-copy>p:not(.level){font-size:1rem}.lesson-copy li{font-size:.9rem}.finish-panel{padding:20px 14px}.finish-panel h2{font-size:2rem}.finish-actions{display:grid;width:100%}.pixel-btn{width:100%}.level-label{font-size:.75rem}.site-footer{padding:0 8px;font-size:.59rem;letter-spacing:0}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}