:root{--bg:#09151b;--bg2:#10242b;--panel:#142a30;--panel2:#193239;--ink:#eff7ef;--muted:#aac1bc;--line:#345057;--mint:#7ee1b1;--aqua:#7bd3dd;--gold:#f5d88a;--red:#ff8787;--shadow:0 22px 70px #020a0e70;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:radial-gradient(circle at 88% 5%,#184b52 0,transparent 27%),radial-gradient(circle at 5% 34%,#12382e 0,transparent 35%),linear-gradient(180deg,#0b1c22,var(--bg) 70%);color:var(--ink)}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}p{line-height:1.75}h1,h2,h3{letter-spacing:.02em}h1{font-size:clamp(2rem,4vw,3.2rem);line-height:1.22;margin:.18em 0 .28em}h2{font-size:1.55rem;margin:.2em 0 .65em}h3{margin:.2em 0 .5em}small,.small{font-size:.82rem}.muted{color:var(--muted)}.eyebrow{font-size:.74rem;font-weight:800;letter-spacing:.22em;color:var(--mint);text-transform:uppercase}.container{width:min(1220px,calc(100% - 48px));margin:0 auto;padding:36px 0 90px}.container.narrow{max-width:720px}.site-header{height:76px;padding:0 max(24px,calc((100vw - 1220px)/2));display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #ffffff16;background:#0a1a20c9;backdrop-filter:blur(16px);position:relative;z-index:20}.brand{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:900;white-space:nowrap}.brand small{font-size:.66rem;color:var(--muted);font-weight:500;letter-spacing:.08em;display:block;margin-top:-3px}.brand-mark{color:var(--mint);font-size:1.8rem;line-height:1}.site-header nav{display:flex;align-items:center;gap:22px;font-size:.88rem;color:#d0e0d9}.site-header nav a:hover,.nav-logout button:hover{color:var(--mint)}.site-header .nav-cta{padding:9px 18px;background:#25483e;border:1px solid #70b89174;border-radius:9px;color:#dbffe7}.nav-user{padding-left:12px;border-left:1px solid var(--line);color:var(--gold)}.nav-logout{margin:0}.nav-logout button{background:none;border:0;color:inherit;padding:0}.site-footer{border-top:1px solid #ffffff18;padding:26px 24px;text-align:center;font-size:.8rem;color:#a2b7b1}.site-footer span{opacity:.55;margin-left:12px}.flash{width:min(820px,calc(100% - 32px));margin:20px auto -15px;padding:13px 18px;border-radius:12px;position:relative;z-index:30}.flash.success,.notice{background:#1c493b;color:#d8ffe6;border:1px solid #6bc39370}.flash.error{background:#542d32;color:#ffe7e7;border:1px solid #ff969678}.notice{border-radius:10px;padding:12px 14px;margin:20px 0;font-size:.87rem;line-height:1.7}
.btn{border:1px solid transparent;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:11px 20px;font-weight:800;transition:transform .18s,background .18s,border-color .18s,box-shadow .18s;white-space:nowrap}.btn:hover{transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn.primary{color:#08231e;background:linear-gradient(135deg,#b5f8cc,#78dfb4);box-shadow:0 8px 25px #57d69b36}.btn.primary:hover{box-shadow:0 12px 28px #57d69b70}.btn.secondary{color:#dffff0;background:#275c50;border-color:#68b9966b}.btn.ghost{color:#e3f4eb;background:#ffffff0c;border-color:#ffffff37}.btn.danger{color:#ffe2e2;background:#a53e4860;border-color:#f47b7b70}.btn.large{padding:14px 23px;font-size:1rem}.btn.full{width:100%}.btn.small-btn{padding:6px 10px;font-size:.75rem;border-radius:7px}.text-link{color:var(--mint);font-weight:800;display:inline-flex;gap:10px}.text-link:hover{gap:16px}
input,select,textarea{width:100%;color:var(--ink);background:#0b2027;border:1px solid #42636a;border-radius:9px;padding:11px 13px;outline:none;transition:border-color .2s,box-shadow .2s}input:focus,select:focus,textarea:focus{border-color:var(--mint);box-shadow:0 0 0 3px #7ee1b126}input::placeholder,textarea::placeholder{color:#78938f}select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--mint) 50%),linear-gradient(135deg,var(--mint) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px;background-repeat:no-repeat;padding-right:35px}textarea{resize:vertical;line-height:1.6}.form-grid{display:grid;gap:16px}.form-grid label{display:grid;gap:7px;font-size:.87rem;color:#d9e9e2;font-weight:700}.form-grid label small{color:var(--muted);font-weight:400}.form-grid button{justify-self:start}.form-grid .full{justify-self:stretch}.inline-form{display:inline-flex;align-items:center;gap:8px}.check-label{display:flex!important;align-items:center;gap:9px}.check-label input{width:auto}.panel{background:linear-gradient(150deg,#1a343aef,#12292ff2);border:1px solid #ffffff1d;border-radius:20px;padding:25px;box-shadow:var(--shadow)}.panel-heading{display:flex;justify-content:space-between;align-items:start;gap:24px;margin-bottom:20px}.panel-heading h2{margin:0}.panel-heading p{margin:.3em 0}.panel h3{font-size:1.08rem}.page-intro{display:flex;justify-content:space-between;align-items:end;gap:28px;margin:25px 0 32px}.page-intro p{max-width:650px;color:var(--muted);margin:0}.page-intro.compact{margin-top:14px}.intro-badge{background:#ffffff0c;border:1px solid #ffffff26;border-radius:14px;padding:14px 22px;min-width:170px;text-align:right}.intro-badge span{display:block;color:var(--muted);font-size:.8rem}.intro-badge strong{font-size:1.2rem;color:var(--gold)}
.landing{overflow:hidden}.landing-hero{min-height:650px;width:min(1440px,100%);margin:0 auto;position:relative;display:grid;grid-template-columns:1fr 1fr;align-items:center;padding:80px max(35px,calc((100vw - 1220px)/2)) 100px;gap:40px}.landing-copy{position:relative;z-index:2}.landing-copy h1{font-size:clamp(3.2rem,5.8vw,6rem);font-weight:900;line-height:1.16;letter-spacing:-.045em;margin:18px 0 25px}.landing-copy h1 em{font-style:normal;color:var(--mint)}.landing-copy>p{font-size:1.1rem;color:#c4d8ce;max-width:580px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:34px 0}.hero-points{display:flex;flex-wrap:wrap;gap:15px;color:#99bbb0;font-size:.8rem}.glow-orb{position:absolute;border-radius:50%;filter:blur(25px);pointer-events:none}.glow-orb.one{width:350px;height:350px;background:#2f937b36;right:10%;top:10%}.glow-orb.two{width:240px;height:240px;background:#bdb15e1e;left:-7%;bottom:1%}.hero-illustration{height:490px;position:relative;overflow:hidden;border-radius:50% 50% 30px 30px;background:linear-gradient(180deg,#204d50 0,#163d46 53%,#0d2b39 54%,#102d35);box-shadow:inset 0 0 80px #102c42,0 30px 80px #0008;border:1px solid #92d9af45}.hero-moon{position:absolute;width:140px;height:140px;border-radius:50%;top:60px;right:80px;background:radial-gradient(circle,#f7edba,#d6e4b896 53%,#d6e4b800 72%);box-shadow:0 0 90px #f2eab470}.hero-hill{position:absolute;width:120%;height:200px;border-radius:50% 50% 0 0}.hill-back{background:#18423f;left:-30%;top:210px;transform:rotate(8deg)}.hill-front{background:#102d32;right:-30%;top:250px;transform:rotate(-8deg)}.hero-river{position:absolute;bottom:0;left:0;width:100%;height:200px;background:linear-gradient(145deg,#0c3d4b,#145968 45%,#0c3545)}.hero-river i{position:absolute;height:2px;width:32%;background:#9cebd970;left:14%;top:25%;border-radius:50%;animation:ripple 5s linear infinite}.hero-river i:nth-child(2){left:58%;top:54%;width:25%;animation-delay:-2s}.hero-river i:nth-child(3){left:30%;top:78%;width:41%;animation-delay:-3s}.hero-runner{position:absolute;bottom:92px;left:49%;font-size:5rem;color:#f0d789;text-shadow:0 6px 1px #072027,0 0 30px #e0d783;animation:bob 1.3s ease-in-out infinite}.hero-stone{position:absolute;width:44px;height:44px;right:30%;top:125px;border-radius:39% 43% 50% 40%;background:linear-gradient(135deg,#a9b7a6,#637980);box-shadow:7px 10px 1px #031e2b70;animation:stonehover 3s ease-in-out infinite}.hero-caption{position:absolute;bottom:21px;right:20px;padding:9px 12px;border:1px solid #ffffff40;background:#09232aae;border-radius:6px;font-size:.73rem;color:#dcf8e8}.feature-strip{width:min(1220px,calc(100% - 48px));margin:-40px auto 85px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;position:relative}.feature-strip article{background:#173039;border:1px solid #ffffff20;border-radius:18px;padding:25px 28px}.feature-strip article span{color:var(--mint);font-weight:900}.feature-strip article h3{font-size:1.3rem;margin:10px 0}.feature-strip article p{color:var(--muted);font-size:.87rem;margin:0}@keyframes ripple{0%{transform:translateX(-30px);opacity:0}30%{opacity:1}100%{transform:translateX(100px);opacity:0}}@keyframes bob{50%{transform:translateY(-12px)}}@keyframes stonehover{50%{transform:translateY(20px) rotate(20deg)}}
.auth-shell{min-height:calc(100vh - 145px);display:grid;grid-template-columns:minmax(280px,.9fr) minmax(420px,1fr);max-width:1180px;margin:0 auto;padding:48px 24px;gap:35px;align-items:stretch}.auth-art{background:linear-gradient(150deg,#1e594f,#102b38 75%);border:1px solid #88d4a533;border-radius:22px;overflow:hidden;position:relative;min-height:560px}.auth-art-inner{padding:65px 55px;position:relative;z-index:1}.auth-art h2{font-size:clamp(2.2rem,4vw,3.8rem);line-height:1.3;margin:26px 0 14px}.auth-art p{color:#c9e6d4}.auth-art-river{height:220px;background:radial-gradient(ellipse at 70% 0,#95c6a85a,transparent 45%),repeating-linear-gradient(173deg,#5cabb85c 0 3px,transparent 3px 25px),linear-gradient(135deg,#174d5f,#0b2f3b);position:absolute;bottom:-55px;left:-10%;width:120%;border-radius:50% 50% 0 0;transform:rotate(-7deg)}.auth-card{align-self:center;background:#183039f2;border:1px solid #ffffff20;border-radius:22px;padding:40px;box-shadow:var(--shadow)}.auth-card h1{font-size:2.3rem}.auth-card>.muted{margin-bottom:28px}.auth-links{display:flex;justify-content:space-between;margin-top:20px;font-size:.88rem;color:var(--mint)}.switch-auth{text-align:center;color:var(--muted)}.switch-auth a{color:var(--mint)}
.dashboard .wave{color:var(--gold);font-size:.7em}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:42px}.metric-card{min-height:137px;padding:22px;background:linear-gradient(145deg,#1a353a,#11272d);border:1px solid #ffffff1e;border-radius:18px;position:relative;overflow:hidden}.metric-card:after{content:"";position:absolute;width:100px;height:100px;border:1px solid #ffffff0c;border-radius:50%;right:-35px;top:-35px}.metric-card span{display:block;color:#afc9be;font-size:.87rem}.metric-card strong{display:inline-block;font-size:2.55rem;margin-top:11px;line-height:1}.metric-card small{color:var(--muted);margin-left:5px}.metric-card.accent{background:linear-gradient(130deg,#2f6759,#17483f)}.metric-card.accent strong{color:#c1ffdc}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:36px 0 18px}.section-heading h2{margin:2px 0 0}.section-heading>span{color:var(--muted);font-size:.8rem}.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.subject-card{border:1px solid #ffffff24;border-radius:19px;min-height:245px;padding:27px;position:relative;overflow:hidden;background:linear-gradient(145deg,#1d4d4e,#112c36)}.subject-card:before{content:"";position:absolute;width:170px;height:170px;border:1px solid #ffffff12;border-radius:50%;right:-65px;top:-58px}.subject-1{background:linear-gradient(145deg,#3b4952,#172b3a)}.subject-2{background:linear-gradient(145deg,#4c4934,#292d27)}.subject-3{background:linear-gradient(145deg,#3f3d56,#1d283b)}.subject-icon{font-size:2.2rem;color:#c5f9d8}.subject-meta{text-transform:uppercase;letter-spacing:.12em;font-size:.69rem;color:#a9c4bf;margin:12px 0 4px}.subject-card h3{font-size:1.5rem}.subject-card p{color:#bdd1cf;font-size:.85rem;min-height:50px}.insight-grid{display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:16px}.donut-row{display:flex;align-items:center;gap:20px;min-height:190px}.donut{width:150px;height:150px;flex:none;border-radius:50%;display:grid;place-items:center;background:conic-gradient(#31505a 0 100%);position:relative}.donut:before{content:"";position:absolute;inset:26px;border-radius:50%;background:#172e35}.donut span{position:relative;text-align:center;color:#b5d5c9;font-size:.8rem}.donut b{display:block;font-size:1.4rem;color:white}.chart-legend{display:grid;gap:8px;font-size:.76rem}.legend-row{display:flex;align-items:center;gap:7px;line-height:1.4}.legend-row i{width:8px;height:8px;border-radius:50%;flex:none}.accuracy-bars{display:grid;gap:14px;padding-top:8px}.accuracy-row>div{display:flex;justify-content:space-between;font-size:.8rem}.accuracy-row>div b{color:var(--mint)}.accuracy-row i{display:block;width:100%;height:7px;background:#0a1c22;border-radius:20px;margin:8px 0;overflow:hidden}.accuracy-row i:before{content:"";display:block;width:var(--amount);height:100%;background:linear-gradient(90deg,#5dc7b6,#d5ec9d);border-radius:20px}.accuracy-row small{color:#7fa19b;font-size:.7rem}.empty-small{color:#829c96;font-size:.85rem}.ai-panel{display:grid;grid-template-columns:1fr 1.15fr;gap:32px;margin-top:22px;align-items:center}.ai-panel p{color:var(--muted)}.ai-report{min-height:160px;background:#0e232a;border:1px dashed #75bc9b55;border-radius:15px;padding:20px;white-space:normal;line-height:1.85}.ai-report p{margin:8px 0;color:#d8eadd}.ai-placeholder{text-align:center;color:var(--mint);font-size:2rem;padding-top:12px}.ai-placeholder span{display:block;color:var(--muted);font-size:.85rem}
.game-layout{display:grid;grid-template-columns:310px minmax(0,1fr);gap:20px;align-items:start}.game-setup{display:grid;gap:17px}.game-setup h2{margin:-12px 0 0}.game-setup>label:not(.switch-row){display:grid;gap:7px;font-size:.86rem;font-weight:800}.game-setup label small{font-size:.73rem;color:var(--muted);font-weight:400}.switch-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:15px 0;border-top:1px solid #ffffff1b;border-bottom:1px solid #ffffff1b;cursor:pointer}.switch-row span{display:grid;gap:5px;font-size:.82rem}.switch-row input{position:absolute;opacity:0;width:1px}.switch-row i{width:45px;height:26px;flex:none;border-radius:20px;background:#5b6d6b;position:relative;transition:background .2s}.switch-row i:before{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;background:white;border-radius:50%;transition:transform .2s}.switch-row input:checked+i{background:#50b887}.switch-row input:checked+i:before{transform:translateX(19px)}.setup-help,.stage-footnote{font-size:.73rem;color:#89a7a2;text-align:center;line-height:1.6;margin:0}.game-stage-wrap{min-width:0}.game-toolbar{height:43px;display:flex;align-items:center;gap:8px;color:#cbe0d3;font-size:.83rem}.game-toolbar>div{margin-left:auto;display:flex;gap:12px}.game-toolbar button{background:none;color:#cce4d9;border:0;font-size:.8rem}.game-toolbar button:hover{color:var(--mint)}.live-dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint)}.game-stage{aspect-ratio:16/9;width:100%;position:relative;overflow:hidden;border:1px solid #84d9b755;border-radius:18px;background:#08171e;box-shadow:0 25px 80px #0009}.game-stage canvas{width:100%;height:100%;image-rendering:pixelated;display:block}.game-stage:fullscreen{border:0;border-radius:0;display:grid;place-items:center;background:#07161b}.game-stage:fullscreen canvas{width:min(100vw,177.78vh);height:auto;aspect-ratio:16/9}.game-stage:fullscreen .game-hud,.game-stage:fullscreen .question-modal,.game-stage:fullscreen .result-modal,.game-stage:fullscreen .feedback{left:50%;transform:translateX(-50%);width:min(95vw,800px)}.game-hud{position:absolute;top:14px;left:16px;right:16px;display:flex;justify-content:space-between;gap:8px;pointer-events:none}.game-hud span{background:#092128d9;border:1px solid #9adabb55;border-radius:8px;padding:6px 10px;font-size:clamp(.6rem,1vw,.85rem);font-weight:800;color:#e6ffed}.game-splash,.result-modal{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:#061c2494;backdrop-filter:blur(3px);padding:20px}.game-splash span{font-size:3rem;color:var(--mint)}.game-splash h2{font-size:clamp(1.4rem,3vw,2.4rem);margin:8px 0}.game-splash p{color:#c5d9d5}.question-modal{position:absolute;left:50%;top:50%;transform:translate(-50%,-46%);width:min(88%,650px);max-height:86%;overflow-y:auto;background:#102932f2;border:1px solid #a5e5c598;border-radius:17px;box-shadow:0 24px 75px #000c;padding:clamp(13px,2vw,24px);scrollbar-width:thin}.question-top{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--mint);font-weight:800}.timer-pill{background:#234c45;color:#d2ffe4;padding:5px 9px;border-radius:8px;min-width:75px;text-align:center}.timer-pill.urgent{background:#713c40;color:#ffe8e3}.timer-track{height:5px;background:#0a1d25;border-radius:5px;margin:10px 0 13px;overflow:hidden}.timer-track i{display:block;height:100%;width:100%;background:linear-gradient(90deg,#63d5b0,#d3e795);transition:width .08s linear}.timer-track i.urgent{background:linear-gradient(90deg,#f6a560,#ff7777)}.question-modal h2{font-size:clamp(.86rem,1.55vw,1.15rem);line-height:1.45;margin:0 0 10px;font-weight:800;letter-spacing:0}.options{display:grid;gap:6px}.option-btn{display:flex;align-items:flex-start;text-align:left;gap:10px;width:100%;background:#1b3b42;color:#e6f6eb;border:1px solid #ffffff27;border-radius:9px;padding:7px 10px;font-size:clamp(.72rem,1.18vw,.92rem);line-height:1.38;transition:background .16s,border-color .16s}.option-btn:hover{background:#2e5e57;border-color:#8cdbad}.option-btn b{flex:none;color:var(--mint)}.option-btn.correct{background:#26734e;border-color:#a5f3b4}.option-btn.wrong{background:#793f43;border-color:#ffacac}.option-btn:disabled{cursor:default}.question-hint{color:#9ebfba;text-align:center;font-size:.69rem;line-height:1;margin:9px 0 0}.feedback{position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);background:#102c2c;border:1px solid #adf0cb;padding:20px 28px;border-radius:15px;font-size:1.45rem;font-weight:900;text-align:center;white-space:nowrap;box-shadow:var(--shadow)}.feedback.bad{background:#5a2e35;border-color:#ff9999}.result-modal{z-index:4;background:#071a20e8}.result-modal .result-icon{font-size:2.8rem;color:var(--gold)}.result-modal h2{font-size:clamp(1.5rem,3vw,2.5rem);margin:8px 0}.result-modal p{color:#bdd8cb}.result-score{font-size:clamp(2rem,5vw,4rem);font-weight:900;color:var(--mint);line-height:1.2}.result-actions{display:flex;gap:10px;margin-top:12px}.hidden{display:none!important}.stage-footnote{margin-top:12px}
.leaderboard{padding:12px 22px 25px}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.85rem}th{text-align:left;color:#a4c9ba;font-size:.75rem;letter-spacing:.05em;font-weight:800;white-space:nowrap}th,td{padding:14px 12px;border-bottom:1px solid #ffffff16}tbody tr:hover{background:#ffffff0a}td{color:#d9e9e1;white-space:nowrap}.rank-medal{font-size:1.2rem}.rank-1{background:#cfaa4221}.rank-2{background:#a9c6ce16}.rank-3{background:#cd976c16}.leaderboard>p{padding:0 12px}.profile-facts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:28px}.profile-facts span{color:var(--muted);font-size:.8rem}.profile-facts strong{display:block;color:var(--ink);font-size:1rem;margin-top:4px}
.admin-page .metric-grid{margin-top:20px}.admin-badge{background:#c3ab6530;color:var(--gold);border:1px solid #d9bc7770;border-radius:20px;padding:9px 15px;font-size:.8rem}.admin-tabs{display:flex;gap:7px;overflow-x:auto;border-bottom:1px solid var(--line);margin:0 0 25px;padding-bottom:8px}.admin-tabs a{padding:10px 14px;color:var(--muted);font-size:.83rem;white-space:nowrap;border-radius:8px}.admin-tabs a.active,.admin-tabs a:hover{background:#2a5549;color:#e6ffee}.status-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0}.status-list span{padding:18px;background:#0c2128;border-radius:10px;color:var(--muted);font-size:.8rem}.status-list b{display:block;color:var(--ink);font-size:1.25rem;margin-top:6px}.search-form{display:flex;gap:8px}.search-form input{min-width:235px}.admin-two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start;margin-bottom:20px}.admin-item-list{display:grid;gap:8px;margin-top:19px}.admin-item{background:#0d252b;border:1px solid #ffffff16;border-radius:11px;padding:12px;display:flex;align-items:center;flex-wrap:wrap;justify-content:space-between;gap:9px}.admin-item strong{display:block;font-size:.86rem}.admin-item small{display:block;color:var(--muted);margin-top:4px}.admin-item>a{color:var(--mint);font-size:.75rem}.admin-item details{width:100%;font-size:.78rem}.admin-item details form{margin-top:10px}.admin-item summary{cursor:pointer;color:var(--muted)}.tag-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}.tag{border:1px solid #8dd0ad65;background:#234a3c;color:#d9fce8;border-radius:22px;padding:7px 10px;font-size:.75rem}.tag.inactive{background:#233136;color:#95aaa5;border-color:#60716e}.upload-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.upload-row input{flex:1;min-width:230px}.question-admin-list{display:grid;gap:8px;margin-top:16px}.question-editor{background:#0b232a;border:1px solid #ffffff1b;border-radius:11px;padding:12px 15px}.question-editor summary{cursor:pointer;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.86rem}.question-editor summary span{color:var(--mint);margin-right:8px}.question-editor form{margin:17px 0}.question-edit-form{grid-template-columns:1fr 1fr}.question-edit-form label:first-of-type{grid-column:1/-1}.narrow-panel{max-width:720px}.warn-text{color:var(--red)}code{background:#0b2228;border:1px solid #ffffff1d;padding:2px 5px;border-radius:4px}.empty-state{padding:40px;text-align:center;color:#a7c1b8}
.pager{display:flex;justify-content:flex-end;align-items:center;gap:10px;margin-top:18px;color:var(--muted);font-size:.8rem}
.game-stage:fullscreen .question-modal{left:50%;top:50%;transform:translate(-50%,-50%);width:min(90vw,760px);max-height:85vh}
@media(max-width:1000px){.insight-grid{grid-template-columns:1fr 1fr}.accuracy-panel{grid-column:1/-1}.game-layout{grid-template-columns:270px minmax(0,1fr)}.subject-grid{grid-template-columns:repeat(2,1fr)}.landing-hero{padding:70px 32px}.landing-copy h1{font-size:clamp(3rem,5vw,4.4rem)}}
@media(max-width:720px){.site-header{height:auto;min-height:65px;padding:10px 18px;align-items:flex-start;gap:10px}.site-header nav{gap:9px;flex-wrap:wrap;justify-content:flex-end;font-size:.72rem}.nav-user{display:none}.container{width:min(100% - 28px,1220px);padding-top:22px}.page-intro{align-items:flex-start;flex-direction:column}.intro-badge{text-align:left}.metric-grid{grid-template-columns:repeat(2,1fr);gap:10px}.metric-card{min-height:115px;padding:17px}.metric-card strong{font-size:2rem}.landing-hero{grid-template-columns:1fr;padding:60px 23px 75px}.landing-copy h1{font-size:3.3rem}.hero-illustration{height:350px}.feature-strip{grid-template-columns:1fr;margin-top:0}.auth-shell{grid-template-columns:1fr;padding:18px 14px}.auth-art{display:none}.auth-card{padding:28px}.subject-grid,.insight-grid,.ai-panel,.admin-two-col,.game-layout{grid-template-columns:1fr}.accuracy-panel{grid-column:auto}.donut-row{justify-content:center}.game-setup{order:2}.game-stage-wrap{order:1}.game-stage{border-radius:12px}.game-stage .question-modal{width:93%;max-height:90%;padding:10px}.game-hud{top:7px;left:7px;right:7px}.game-hud span{padding:3px 5px}.question-modal h2{font-size:.78rem;margin-bottom:6px}.option-btn{font-size:.68rem;padding:5px 7px}.question-hint{display:none}.timer-track{margin:6px 0}.status-list{grid-template-columns:1fr 1fr}.panel{padding:18px}.panel-heading{flex-direction:column}.search-form{width:100%}.search-form input{min-width:0}.question-edit-form{grid-template-columns:1fr}.profile-facts{grid-template-columns:1fr}.section-heading{align-items:flex-start;flex-direction:column}}
@media(max-width:720px){.game-stage{aspect-ratio:auto;min-height:420px}.game-stage canvas{position:absolute;top:50%;left:0;transform:translateY(-50%);width:100%;height:auto;aspect-ratio:16/9}.game-stage .question-modal{max-height:84%;width:94%}.game-stage:fullscreen canvas{position:static;transform:none}.game-stage:fullscreen{min-height:100vh}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}