:root{color-scheme:dark;--bg:oklch(20% .009 150);--surface:oklch(24% .009 150);--ink:oklch(94% .012 100);--muted:oklch(74% .018 125);--blue:oklch(84% .09 125);--blue-deep:oklch(76% .095 125);--yellow:oklch(84% .09 125);--line:oklch(35% .012 150);--soft:oklch(28% .018 148);--green:oklch(85% .08 145);--green-bg:oklch(28% .035 150);--red:oklch(84% .07 35);--red-bg:oklch(28% .028 25)}body{background:var(--bg);color:var(--ink)}.shell{display:block}.shell>aside{display:none}.workspace{padding-bottom:0}.study-navigation{padding:20px 4vw;display:flex;gap:50px;align-items:center;border-bottom:1px solid var(--line);min-height:86px;background:var(--bg)}.study-navigation .brand{padding:0;flex-shrink:0}.study-navigation .brand img{width:138px}.study-navigation nav{display:flex;align-items:center;gap:8px;flex:1}.study-navigation nav a{display:flex;gap:8px;align-items:center;flex-direction:row;font-size:12px;padding:10px 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0}.btn{border-radius:5px;background:var(--blue);color:var(--bg)}.btn:hover{color:var(--bg);background:var(--blue-deep)}.btn.light{color:var(--ink)}button,select,input{border-radius:5px}.flash{border-radius:8px;background:var(--surface);box-shadow:0 15px 40px oklch(8% .008 150 / .14)}.flash .word{color:var(--blue)}.options button{background:var(--bg)}.options button[aria-pressed=true]{border-color:var(--blue)}.options button:disabled{color:var(--muted)}.account-art{border-radius:8px}.account-art img,.account-success-art,.finish-illustration,.alphabet+.letter-detail img{filter:grayscale(1) brightness(1.9);opacity:.8}.account-tabs{border-radius:7px}.account-tabs button{border-radius:4px}.account-tabs button[aria-pressed=true]{box-shadow:none}.account-art h2{font-family:Golos,sans-serif;font-size:27px}.account-preview-note,.password-field{border-radius:7px}.profile-avatar{background:var(--blue);color:var(--bg)}.chapter-number{border-radius:4px}.ratings button{background:var(--surface)}.audio-control[data-audio-state=playing]{background:var(--soft)}.feedback{border:1px solid var(--line)}footer{max-width:1370px;padding-left:4vw;padding-right:4vw}.book-credit{color:var(--muted)}.skip{background:var(--blue);color:var(--bg)}::selection{background:var(--blue);color:var(--bg)}#notice{background:var(--ink);color:var(--bg)}@media(max-width:1050px){.study-navigation{gap:22px}.study-navigation nav{gap:3px}.study-navigation nav a{padding:9px;font-size:11px}.study-navigation nav a .icon{display:none}.study-layout{gap:30px;grid-template-columns:minmax(0,1.4fr) minmax(250px,1fr)}.study-summary{gap:25px}.study-focus{padding:23px}.study-focus-bottom{gap:12px}.study-focus-bottom small{font-size:9px}}@media(max-width:800px){.study-navigation{justify-content:space-between;padding:18px 4vw}.study-navigation .brand img{width:122px}.study-navigation nav a{padding:9px 7px;font-size:10px}.study-navigation 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.count{display:none}header{position:absolute;top:0;right:0;height:68px;padding:0 16px;max-width:calc(100% - 145px)}header #breadcrumb,header .demo{display:none}.header-tools{gap:7px}.account-entry{padding:0 9px;font-size:10px}.language select{padding:0 6px;font-size:10px}main{padding:28px 20px 30px}.study-intro h1{font-size:32px}.study-intro{margin-bottom:25px}.study-focus{min-height:355px;padding:21px}.study-word{padding:40px 0}.study-word>span{font-size:72px}.study-focus-bottom{align-items:center}.study-focus-bottom .btn{font-size:11px;gap:13px;padding:12px 15px}.study-focus-bottom small{max-width:12ch}.study-side{display:block}.study-note{padding-top:27px}.study-summary{gap:20px;justify-content:space-between;margin-top:30px}.study-summary>div{display:block}.study-summary b{font-size:24px;display:block}.study-summary span{font-size:10px;display:block;margin-top:3px;max-width:11ch}.study-summary>.text-link{display:none}.study-footnote{font-size:10px}.account-layout .intro h1{font-size:31px}footer{padding:0 20px 25px}.book-credit{font-size:9px}}@media(max-width:350px){.study-navigation .brand img{width:100px}header{max-width:calc(100% - 125px)}.study-focus-bottom{display:block}.study-focus-bottom small{display:block;max-width:none;margin-top:12px}.study-word>span{font-size:65px}.study-summary{gap:14px}}
input::placeholder{color:var(--muted);opacity:1}
.flag{background:linear-gradient(#0057B7 50%,#FFD700 50%)}