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img{width:40px;height:40px}.cost strong{font-size:1.7rem}.cost span{color:#69817c}.section-title{margin:40px 0 18px}.prize-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.prize-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:22px}.prize-card>img{width:100%;aspect-ratio:1.2;object-fit:cover;background:#e7f1e7}.prize-card>div{padding:22px}.prize-card h2,.prize-card h3{margin:8px 0}.history-list{display:grid;gap:8px}.history-item{display:grid;grid-template-columns:2fr repeat(3,1fr);align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;color:var(--ink)}.inline-form,.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:end}.inline-form{grid-template-columns:1fr auto}.form-grid label,.inline-form label,.settings-grid label{font-size:.8rem;font-weight:800}.form-grid input,.inline-form input,.settings-grid input,.login-form 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0}.login-form{padding:clamp(35px,6vw,80px);display:flex;flex-direction:column;justify-content:center}.login-form .brand{position:absolute;top:34px}.login-form h2{font-size:2.5rem;margin:12px 0 0}.login-form form{display:grid;gap:18px;margin:30px 0 18px}.login-form label{font-size:.85rem;font-weight:800}.login-form .hint{text-align:center;font-size:.8rem}.teacher-shell{background:#f4f5f1}.teacher-shell #main{max-width:1300px}.teacher-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}.teacher-stats.compact{grid-template-columns:repeat(3,1fr);margin:10px 0}.teacher-stats article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.teacher-stats article span,.teacher-stats article small{font-size:.78rem;color:#697d79}.teacher-stats article strong{display:block;font-size:2.2rem}.panel{margin-bottom:20px}.panel-head{display:flex;align-items:center;justify-content:space-between}.teacher-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.teacher-cards a{display:flex;flex-direction:column;background:var(--deep);color:#fff;border-radius:18px;padding:22px}.teacher-cards a:nth-child(2){background:#fff;color:var(--ink);border:1px solid var(--line)}.teacher-cards a:nth-child(3){background:#e6ae52;color:#243d38}.teacher-cards span,.teacher-cards small{font-size:.75rem;opacity:.8}.teacher-cards strong{font-size:1.3rem;margin:7px 0}.table-wrap{width:100%;overflow:auto;border:1px solid var(--line);border-radius:16px;background:#fff}.table-wrap table{width:100%;border-collapse:collapse;min-width:720px}.table-wrap th,.table-wrap td{text-align:left;border-bottom:1px solid #e7ece7;padding:13px 15px}.table-wrap th{font-size:.72rem;text-transform:uppercase;color:#617873;background:#f5f7f2}.table-wrap td{font-size:.88rem}.table-wrap td small{display:block}.settings-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.metric-row{display:grid;grid-template-columns:1fr 130px 42px;align-items:center;gap:10px;border-bottom:1px solid var(--line);padding:10px 0;font-size:.8rem}.metric-row progress{margin:0}.mistake{border-bottom:1px solid var(--line);padding:11px 0}.mistake p{margin:3px 0;font-size:.86rem}.empty{text-align:center;color:#6d817d;padding:30px}#toast{position:fixed;right:22px;bottom:22px;z-index:90;max-width:380px;background:var(--deep);color:#fff;padding:14px 18px;border-radius:14px;box-shadow:var(--shadow);transform:translateY(120px);opacity:0;transition:.25s}#toast.show{transform:none;opacity:1}[aria-busy=true]{opacity:.6;pointer-events:none}
@media(max-width:900px){.layout{grid-template-columns:1fr}.navigation{order:2;position:fixed;bottom:0;left:0;right:0;z-index:30;min-height:0;padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:#f8faf4f5;border:0;border-top:1px solid var(--line);flex-direction:row;overflow:auto}.navigation a{flex:1;min-width:max-content;text-align:center;padding:9px 12px;font-size:.8rem}.student-shell #main,.teacher-shell #main{padding-bottom:115px}.hero-card{grid-template-columns:1fr;min-height:620px}.hero-copy{padding:40px 32px 0}.hero-image{min-height:340px;mask-image:linear-gradient(180deg,transparent 0,#000 20%)}.difficulty-grid,.prize-grid{grid-template-columns:repeat(2,1fr)}.challenge-layout{grid-template-columns:1fr}.mission-side{display:grid;grid-template-columns:170px 1fr}.side-tip{display:none}.result-card{grid-template-columns:1fr}.result-art{min-height:360px;max-height:470px}.gacha-stage{grid-template-columns:1fr 1fr}.machine{height:470px}.gacha-controls{padding:30px}.login-page{grid-template-columns:1fr}.login-art{display:none}.login-form .brand{position:static;margin-bottom:60px}.teacher-stats{grid-template-columns:repeat(2,1fr)}.teacher-cards,.settings-grid{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:1fr}}
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/* Playful, inclusive adventure palette and reward-station interaction */
:root{--ink:#20275b;--deep:#3d3a9d;--teal:#3979e8;--mint:#deebff;--pale:#f7f8ff;--cream:#fff;--coral:#ff6b64;--line:#d9e1ff;--yellow:#ffd45a;--purple:#7655df;--shadow:0 18px 50px #4c49a62b}
body{background:radial-gradient(circle at 92% 4%,#fff0bd 0,transparent 25%),radial-gradient(circle at 6% 25%,#dceaff 0,transparent 30%),linear-gradient(180deg,#f8f9ff 0,#eef3ff 100%)}
.topbar{background:#fffffff0}.brand-symbol{background:linear-gradient(135deg,#ff786b,#7655df);box-shadow:0 8px 18px #6253b74d}.navigation a{color:#58628b}.navigation a:hover{background:#eef0ff;color:var(--deep)}.navigation a.active{background:linear-gradient(135deg,#dfe8ff,#f4e5ff);color:var(--deep)}
.eyebrow{color:#4a55bb}.primary{background:linear-gradient(135deg,#ff7467,#fa4f9a);box-shadow:0 11px 24px #f3557b40}.primary:hover{background:linear-gradient(135deg,#fa6256,#e9408a);transform:translateY(-2px)}.secondary{background:#fff0ad;color:#553d8e}.tag,.pill{background:#e6ecff;color:#3f4297}.hero-card{background:linear-gradient(135deg,#3141ad,#7853dc)}.hero-card:before{content:'';position:absolute;width:320px;height:320px;border-radius:50%;right:-130px;top:-145px;background:#ffd75d33;box-shadow:-280px 400px 0 #ff98ca1f}.hero-copy p{color:#e7e9ff}.hero-copy .small-note{color:#d4d7ff}.stats-card,.mini-feature,.panel,.center-card,.question-card,.prize-card{border-color:#dce3ff}.difficulty:hover,.difficulty:focus-visible{border-color:#7655df;box-shadow:0 20px 40px #6154b62b}.option:hover:not(:disabled),.option:focus-visible{border-color:#7655df;background:#f3f0ff}.option-letter{background:#e9edff;color:#4b4eb1}.teacher-shell{background:#f4f6ff}.teacher-cards a{background:linear-gradient(135deg,#3e43ad,#7753d8)}.teacher-cards a:nth-child(3){background:linear-gradient(135deg,#ffd45e,#ff9a61);color:#563553}.login-art:after{background:linear-gradient(90deg,#34379bbd,transparent 70%)}
.site-footer{background:linear-gradient(135deg,#24133f,#3a1c60);color:#f4edff;text-align:center;padding:24px 20px 30px!important;font-size:.78rem;position:relative;overflow:hidden}.site-footer:before{content:'';position:absolute;width:340px;height:340px;border-radius:50%;background:#b788ff22;top:-250px;left:50%;transform:translateX(-50%)}.site-footer>*{position:relative}.footer-brand{display:inline-flex;align-items:center;gap:8px;border:1px solid #d9c2ff70;background:#ffffff10;border-radius:999px;padding:8px 18px;font-size:1.15rem;font-weight:900;color:#fff;transition:transform .25s ease,box-shadow .25s ease,background .25s ease;cursor:default}.footer-brand:hover,.footer-brand:focus-visible{transform:translateY(-4px) rotate(-1deg) scale(1.04);background:#ffffff23;box-shadow:0 12px 28px #12052378;outline:none}.site-footer p{margin:11px 0 7px;font-weight:700;color:#ded1f8}.footer-links{color:#c9bde7}.site-footer a{color:#ffe489;font-weight:800;margin-left:8px}
.gacha-stage{border-color:#d9dfff;background:#fff}.machine-wrap{position:relative;isolation:isolate;overflow:hidden;display:grid;place-items:center;min-height:600px;background:linear-gradient(145deg,#a9d9ff,#e5d8ff 54%,#ffe4a9)}.gacha-backdrop{position:absolute;inset:0;z-index:-1;background:radial-gradient(circle at 21% 26%,#fff 0 3px,transparent 4px),radial-gradient(circle at 79% 15%,#fff9e5 0 5px,transparent 6px),radial-gradient(circle at 76% 80%,#fff 0 3px,transparent 4px);background-size:150px 150px,210px 210px,180px 180px;animation:sky-drift 12s linear infinite}.machine-button{position:relative;display:block;width:min(100%,550px);padding:0;border:0;background:transparent;filter:drop-shadow(0 22px 18px #47327a38);transition:transform .28s ease,filter .28s ease}.machine-button:not(:disabled):hover,.machine-button:not(:disabled):focus-visible{transform:translateY(-10px) scale(1.035);filter:drop-shadow(0 30px 24px #513a8b5a);outline:none}.machine-button .machine{position:relative;z-index:2;width:100%;height:540px;object-fit:contain;transition:transform .28s ease}.machine-button:not(:disabled):hover .machine{animation:machine-float 1.25s ease-in-out infinite}.machine-glow{position:absolute;z-index:1;inset:19% 15% 17%;border-radius:50%;background:radial-gradient(circle,#fffde9a8 0,transparent 64%);opacity:.2;transform:scale(.8);transition:opacity .25s ease,transform .25s ease}.machine-button:not(:disabled):hover .machine-glow{opacity:1;transform:scale(1.22)}.capsule{position:absolute;z-index:3;width:28px;height:28px;border-radius:50%;border:3px solid #fff9;background:linear-gradient(135deg,#ff687d 0 48%,#ffe16b 49%);box-shadow:0 6px 10px #5a347744;opacity:0}.capsule-a{left:29%;top:37%}.capsule-b{right:24%;top:44%;background:linear-gradient(135deg,#58b9ff 0 48%,#d9f4ff 49%)}.capsule-c{right:37%;bottom:21%;background:linear-gradient(135deg,#8559ef 0 48%,#ffc9ec 49%)}.machine-button:not(:disabled):hover .capsule{opacity:1;animation:capsule-bob 1.2s ease-in-out infinite}.machine-button:not(:disabled):hover .capsule-b{animation-delay:.25s}.machine-button:not(:disabled):hover .capsule-c{animation-delay:.48s}.machine-hint{position:absolute;bottom:14px;margin:0;z-index:4;background:#ffffffd9;border:1px solid #ffffff;border-radius:999px;padding:7px 13px;color:#4b4b90;font-size:.78rem;font-weight:800;box-shadow:0 8px 16px #58477922}.gacha-stage.is-drawing .machine-button{animation:machine-shake .65s ease-in-out}.gacha-stage.is-drawing .capsule{opacity:1;animation:capsule-launch .65s cubic-bezier(.2,.8,.4,1) both}.gacha-stage.is-drawing .capsule-b{animation-delay:.08s}.gacha-stage.is-drawing .capsule-c{animation-delay:.16s}.gacha-stage.is-drawing .machine-glow{opacity:1;transform:scale(1.5);transition:.1s}
@keyframes sky-drift{to{background-position:150px 150px,-210px 210px,180px -180px}}@keyframes machine-float{50%{transform:translateY(-7px) rotate(1deg)}}@keyframes capsule-bob{50%{transform:translateY(-11px) rotate(14deg)}}@keyframes machine-shake{20%,60%{transform:translateX(-10px) rotate(-2deg)}40%,80%{transform:translateX(11px) rotate(2deg)}}@keyframes capsule-launch{0%{transform:translate(0,25px) scale(.2);opacity:0}42%{opacity:1}100%{transform:translate(24px,-100px) rotate(210deg) scale(1.2);opacity:0}}
@media(max-width:900px){.machine-wrap{min-height:480px}.machine-button .machine{height:440px}.machine-hint{font-size:.7rem;bottom:8px}}@media(max-width:600px){.machine-wrap{min-height:400px}.machine-button .machine{height:380px}.machine-button:not(:disabled):hover{transform:none}.machine-hint{max-width:calc(100% - 22px);text-align:center}.site-footer{padding-bottom:102px!important}.footer-brand{font-size:1rem}.site-footer p{font-size:.72rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}.machine-button{transition:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}.primary:hover,.difficulty:hover{transform:none}}