:root{color-scheme:light;--paper:#f6f5f0;--white:#fff;--ink:#24342e;--muted:#6e786f;--line:#dedfd5;--accent:#e9603b;--soft:#f9e9df;--green:#307251;--sage:#eaf0e4;--red:#b23d36;--radius:20px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;--surface:#fffdf9;--surface-alt:#fffdf8;--hover:#f6f8f1;--selected:#f1f5eb;--danger-bg:#fbede9;--danger-line:#efccc4;--warm:#f9e9df;--warm-text:#bd734f;--violet:#e8ebf6;--violet-text:#6f79a0;--success-line:#b8ccb0;--muted-line:#d3dec8;--art:#e8eedf;--art-line:#d7decf;--progress:#e5e7dd;--sticky:#f6f5f0f5;--action-accent:#e9603b;--action-green:#307251;--toast:#24342e;--toast-text:#fff}
:root[data-theme="dark"]{color-scheme:dark;--paper:#171d1a;--white:#232c26;--surface:#202823;--ink:#e6eee6;--muted:#a6b2a8;--line:#3a473d;--accent:#f28b68;--soft:#3d2b24;--green:#9dccad;--sage:#2c3c30;--red:#f1a295;--surface-alt:#2b352b;--hover:#29382d;--selected:#293b2f;--danger-bg:#3e2827;--danger-line:#7c4940;--warm:#3e3028;--warm-text:#e3ae88;--violet:#2e3246;--violet-text:#b6bce7;--success-line:#526e56;--muted-line:#495d48;--art:#354332;--art-line:#62775b;--progress:#354238;--sticky:#171d1af5;--action-accent:#bc4b2f;--action-green:#356b49;--toast:#e6eee6;--toast-text:#19241c}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:not-allowed;opacity:.45}button:focus:not(:focus-visible){outline:none}button{touch-action:manipulation}a{color:inherit}input,textarea,select{border:1px solid var(--line);background:var(--white);color:var(--ink);border-radius:10px;padding:12px 14px;font-size:16px;min-width:0}input:focus,textarea:focus,select:focus{border-color:var(--accent)}input[type=checkbox]{accent-color:var(--green);width:19px;height:19px;flex-shrink:0;cursor:pointer;padding:0}textarea{resize:vertical;min-height:78px}label{display:grid;gap:9px;font-size:13px;font-weight:600}button svg,.icon svg{width:20px;height:20px;display:block;flex-shrink:0}h1,h2,h3,p{margin:0}h1{font-size:clamp(32px,4.2vw,52px);letter-spacing:-1.8px;line-height:1.2;font-weight:650;white-space:pre-line}h2{font-size:24px;letter-spacing:-.6px}h3{font-size:18px;letter-spacing:-.3px}p{line-height:1.8}small,.muted{color:var(--muted)}.app-shell{min-height:100dvh;display:grid;grid-template-columns:230px 1fr}.sidebar{border-right:1px solid var(--line);padding:36px 24px;display:flex;flex-direction:column;gap:38px;position:sticky;top:0;height:100dvh}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:23px;font-weight:750;letter-spacing:-.8px}.brand-mark{display:grid;place-items:center;width:36px;height:36px;background:var(--accent);color:white;border-radius:12px}.brand-mark svg{width:26px;height:26px}.nav{display:grid;gap:8px}.nav a{display:flex;align-items:center;gap:13px;padding:13px 15px;text-decoration:none;color:var(--muted);border-radius:12px;font-size:14px;font-weight:600}.nav a.active{color:var(--green);background:var(--sage)}.sidebar-bottom{margin-top:auto;display:grid;gap:20px}.side-caption{font-size:12px;line-height:1.7;color:var(--muted);max-width:160px}.language{display:grid;gap:7px}.language label{font-size:11px;text-transform:uppercase;letter-spacing:1.2px;color:var(--muted)}.language select{padding:10px 12px;font-size:13px;background:transparent}.sound{display:flex;gap:10px;align-items:center;background:none;border:0;padding:6px 0;font-size:12px;color:var(--muted)}.main{max-width:1240px;width:100%;margin:auto;padding:40px 60px 24px;align-self:start}.topline{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);padding-bottom:34px}.status-dot{display:inline-block;width:7px;height:7px;background:#86a280;border-radius:50%;margin-right:7px}.pill{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border-radius:999px;background:var(--sage);color:var(--green);font-size:11px;font-weight:600}.hero{display:grid;grid-template-columns:1fr 180px;gap:24px;align-items:center;padding:28px 0 42px}.eyebrow{font-size:10px;letter-spacing:2.4px;font-weight:700;color:var(--accent);margin-bottom:18px}.hero p{font-size:13px;color:var(--muted);margin-top:18px;max-width:480px}.word-art{position:relative;height:160px;display:grid;place-items:center}.art-card{position:absolute;width:108px;height:134px;border:1px solid var(--line);background:var(--art);transform:rotate(-12deg);border-radius:16px;left:14px;top:18px}.art-card.front{background:var(--surface-alt);transform:rotate(9deg);left:52px;top:8px;box-shadow:0 10px 24px #35452b0d;display:grid;place-items:center}.art-card strong{font-family:Georgia,serif;font-size:50px;font-weight:400;color:var(--green)}.art-line{position:absolute;width:43px;height:3px;background:var(--art-line);bottom:26px;left:30px;border-radius:8px}.art-spark{position:absolute;right:0;top:0;color:var(--accent);font-size:34px}.section-bar,.toolbar,.row{display:flex;align-items:center;justify-content:space-between;gap:16px}.section-bar{margin:10px 0 20px}.section-heading{display:flex;align-items:center;gap:12px}.section-heading h2{font-size:19px}.count{color:var(--muted);font-size:11px}.btn{display:inline-flex;justify-content:center;align-items:center;gap:9px;min-height:44px;border:1px solid var(--line);border-radius:11px;background:var(--white);padding:11px 17px;font-size:13px;font-weight:600;text-decoration:none}.btn.primary{background:var(--action-accent);border-color:var(--action-accent);color:white}.btn.green{background:var(--action-green);border-color:var(--action-green);color:white}.btn.ghost{background:transparent}.btn.danger{color:var(--red);background:var(--danger-bg);border-color:var(--danger-line)}.btn.small{min-height:36px;padding:7px 11px;font-size:12px}.icon-btn{border:0;background:transparent;padding:9px;border-radius:9px;display:inline-grid;place-items:center;color:var(--muted)}.icon-btn:hover{background:var(--sage)}.search{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:10px;background:var(--white);padding-left:12px;max-width:320px;width:100%;color:var(--muted)}.search input{border:0;background:transparent;padding:10px 8px;width:100%;font-size:13px}.search input:focus{outline:none}.search:focus-within{border-color:var(--accent)}.toolbar{margin-bottom:18px;flex-wrap:wrap}.toolbar .actions,.actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.text-btn{font-size:12px;background:none;border:0;padding:7px 2px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.set-card{position:relative;border:1px solid var(--line);border-radius:var(--radius);padding:21px;background:var(--surface);min-height:190px;display:flex;flex-direction:column;gap:16px;transition:border-color .18s,transform .18s}.set-card:hover{border-color:var(--success-line);transform:translateY(-2px)}.set-card.selected{border-color:var(--green);background:var(--selected)}.card-head{display:flex;justify-content:space-between;align-items:center}.set-symbol{width:37px;height:40px;display:grid;place-items:center;background:var(--sage);border-radius:10px;color:var(--green)}.set-card:nth-child(3n+2) .set-symbol{background:var(--warm);color:var(--warm-text)}.set-card:nth-child(3n) .set-symbol{background:var(--violet);color:var(--violet-text)}.set-card h3{overflow-wrap:anywhere;line-height:1.5;font-size:16px}.card-open{border:0;background:transparent;padding:0;text-align:left;display:grid;gap:7px;width:100%}.card-open:after{content:"";position:absolute;inset:67px 16px 45px}.card-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:auto;color:var(--muted);font-size:11px;gap:12px}.card-bottom button{position:relative;z-index:1}.selected-bar{padding:14px 18px;border:1px solid var(--success-line);background:var(--sage);border-radius:13px;display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;font-size:13px}.footer{margin-top:64px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:10px;letter-spacing:.5px}.empty{border:1px dashed var(--line);border-radius:var(--radius);padding:48px 24px;text-align:center;display:grid;gap:14px;justify-items:center}.empty p{font-size:13px;color:var(--muted)}.flow{max-width:740px;margin:20px auto}.back{display:inline-flex;align-items:center;gap:7px;border:0;background:none;padding:4px 0;font-size:12px;color:var(--muted);margin-bottom:32px}.flow-title{margin-bottom:30px}.flow-title h1{font-size:35px;letter-spacing:-1px}.flow-title p{color:var(--muted);font-size:13px;margin-top:12px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.mode-card{padding:28px;border:1px solid var(--line);border-radius:20px;background:var(--surface);text-align:left;display:grid;gap:15px}.mode-card:hover{border-color:var(--accent)}.direction{font-size:30px;font-weight:650;letter-spacing:-1px}.direction .arrow{color:var(--accent);padding:0 9px}.mode-card p{font-size:12px;color:var(--muted)}.mode-card small{font-size:11px}.count-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:30px 0 20px}.count-btn{padding:20px 8px;border:1px solid var(--line);background:var(--surface);border-radius:14px;font-weight:650;font-size:18px}.count-btn.active{border-color:var(--green);background:var(--sage);color:var(--green)}.custom-count{max-width:260px;margin-bottom:22px}.flow-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:30px}.error{color:var(--red);font-size:13px;line-height:1.7;background:var(--danger-bg);padding:12px 15px;border-radius:10px;margin-top:16px}.notice{color:var(--muted);font-size:12px;line-height:1.8;margin-top:18px}.quiz{max-width:720px;margin:16px auto}.quiz-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);gap:12px}.progress{height:5px;background:var(--progress);border-radius:10px;margin:18px 0 30px;overflow:hidden}.progress span{display:block;height:100%;background:var(--green);border-radius:10px;transition:width .2s}.question-card{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:34px;min-height:200px;display:flex;flex-direction:column;justify-content:center;text-align:center}.question-card .eyebrow{color:var(--muted);margin-bottom:25px;letter-spacing:1.4px}.question-word{font-size:clamp(28px,5vw,46px);font-weight:650;letter-spacing:-1px;overflow-wrap:anywhere;line-height:1.35}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.option{display:flex;align-items:center;gap:12px;text-align:left;border:1px solid var(--line);border-radius:13px;padding:18px;background:var(--white);min-height:75px;font-size:15px;line-height:1.5}.option .letter{font-size:11px;flex-shrink:0;border:1px solid var(--line);border-radius:7px;width:25px;height:25px;display:grid;place-items:center;color:var(--muted)}.option:hover:enabled{border-color:var(--green);background:var(--hover)}.option.correct{border-color:var(--green);background:var(--sage);color:var(--green);opacity:1}.option.wrong{border-color:var(--danger-line);background:var(--danger-bg);color:var(--red);opacity:1}.typing-form{display:grid;grid-template-columns:1fr auto;gap:12px;margin-top:24px}.typing-form input{padding:17px;font-size:18px}.feedback{padding:20px 22px;border:1px solid var(--success-line);background:var(--sage);border-radius:14px;margin-top:24px;line-height:1.8}.feedback.wrong{background:var(--danger-bg);border-color:var(--danger-line)}.feedback h3{font-size:16px}.feedback p{font-size:13px;margin-top:8px;white-space:pre-line;overflow-wrap:anywhere}.feedback small{display:block;margin-top:12px}.quiz-actions{display:flex;justify-content:flex-end;margin-top:22px}.quiz-actions .skip{margin-right:auto}.result-hero{text-align:center;margin-bottom:34px}.result-medal{display:grid;place-items:center;margin:10px auto 24px;width:80px;height:80px;border:1px solid var(--muted-line);background:var(--sage);border-radius:50%;color:var(--green)}.result-medal svg{width:40px;height:40px}.result-hero h1{font-size:35px}.result-hero p{color:var(--muted);font-size:13px;margin-top:12px}.score-number{font-size:66px;letter-spacing:-3px;font-weight:650;margin:26px 0 4px}.score-number small{font-size:30px;letter-spacing:-1px}.review{margin-top:40px}.review h2{font-size:18px;margin-bottom:15px}.review-item{padding:18px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:23px 1fr;gap:10px;line-height:1.7}.review-item .verdict{font-size:19px;color:var(--green)}.review-item .verdict.bad{color:var(--red)}.review-item strong{font-size:14px;overflow-wrap:anywhere}.review-item p{font-size:13px;color:var(--muted);white-space:pre-line;overflow-wrap:anywhere}.center-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.login-card{max-width:460px;margin:48px auto;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:36px;display:grid;gap:24px}.login-card h1{font-size:30px;letter-spacing:-1px}.login-card p{font-size:13px;color:var(--muted)}.login-card form{display:grid;gap:18px}.edit-heading{margin:25px 0 30px}.edit-heading h1{font-size:36px;letter-spacing:-1px}.edit-heading p{font-size:13px;color:var(--muted);margin-top:12px}.editor-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:28px;margin-top:26px}.set-list{display:flex;flex-direction:column;gap:8px}.set-list button{text-align:left;border:1px solid transparent;background:transparent;border-radius:10px;padding:12px;font-size:13px;line-height:1.5;overflow-wrap:anywhere}.set-list button.active{background:var(--sage);border-color:var(--success-line);color:var(--green)}.set-list button small{display:block;margin-top:3px;font-size:10px}.editor-panel{display:grid;gap:20px;min-width:0}.editor-panel>.row{flex-wrap:wrap}.editor-words{display:grid;gap:14px}.word-row{border:1px solid var(--line);border-radius:16px;background:var(--surface);padding:18px;display:grid;gap:15px}.word-row-head{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted)}.word-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.word-fields .wide{grid-column:1/-1}.word-fields label{font-size:11px}.word-fields input,.word-fields textarea{padding:10px 12px;font-size:14px}.editor-actions{position:sticky;bottom:12px;display:flex;gap:10px;align-items:center;padding:13px;background:var(--sticky);border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 24px #24342e10;z-index:3}.editor-actions .muted{font-size:11px;margin-right:auto}.editor-actions .btn{white-space:nowrap}.import-list{max-height:280px;overflow:auto;margin:18px 0;display:grid;gap:10px}.import-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--paper);border-radius:10px}.import-item strong{font-size:13px;overflow-wrap:anywhere}.import-item small{font-size:11px;display:block;margin-top:4px}.import-item label{display:flex;align-items:center;gap:12px;width:100%}.file-picker{display:block;border:1px dashed var(--success-line);border-radius:14px;padding:24px;text-align:center;color:var(--green);margin:20px 0;background:var(--sage);cursor:pointer}.file-picker input{max-width:100%;font-size:12px;margin-top:14px;background:transparent;border:0}.file-picker small{display:block;margin-top:7px;font-size:11px;font-weight:400}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;clip:rect(0,0,0,0);overflow:hidden;border:0}dialog{border:1px solid var(--line);border-radius:22px;max-width:560px;width:calc(100% - 32px);padding:30px;color:var(--ink);background:var(--surface);box-shadow:0 24px 100px #20352c30}dialog::backdrop{background:#20352c70;backdrop-filter:blur(4px)}dialog h2{padding-right:28px;font-size:23px;line-height:1.4}dialog p{font-size:13px;color:var(--muted);margin-top:16px}dialog .modal-close{position:absolute;right:17px;top:16px}dialog .modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px;flex-wrap:wrap}#toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,18px);background:var(--toast);color:var(--toast-text);padding:13px 20px;border-radius:12px;font-size:13px;max-width:calc(100% - 32px);opacity:0;transition:opacity .18s,transform .18s;pointer-events:none;z-index:20}#toast.visible{opacity:1;transform:translate(-50%,0)}#confetti{position:fixed;inset:0;pointer-events:none;z-index:30;width:100%;height:100%}.busy{opacity:.65;pointer-events:none}.spinner{width:25px;height:25px;border:2px solid var(--line);border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite}.loading{display:grid;justify-items:center;gap:20px;padding:90px 20px;color:var(--muted);font-size:13px}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:1400px){.main{padding-top:50px}.hero{padding-top:50px;padding-bottom:60px}.grid{gap:22px}.set-card{min-height:215px}}
@media(max-width:1150px){.main{padding:30px 32px}.app-shell{grid-template-columns:190px 1fr}.sidebar{padding:30px 18px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.editor-layout{grid-template-columns:160px minmax(0,1fr);gap:18px}.word-fields{grid-template-columns:1fr}.word-fields .wide{grid-column:auto}}
@media(max-width:760px){.app-shell{display:block}.sidebar{position:relative;display:flex;flex-direction:row;height:auto;flex-wrap:wrap;padding:17px 20px;gap:14px;border-right:0;border-bottom:1px solid var(--line);align-items:center}.brand{font-size:20px}.brand-mark{width:31px;height:31px;border-radius:10px}.nav{display:flex;margin-left:auto;gap:3px}.nav a{padding:10px;font-size:12px;gap:7px}.nav a svg{width:17px;height:17px}.sidebar-bottom{display:flex;width:100%;justify-content:space-between;align-items:center;margin:0;padding-top:3px;gap:10px}.side-caption{display:none}.language{display:flex;align-items:center;gap:8px}.language label{font-size:9px}.language select{padding:6px 9px;font-size:12px}.sound{font-size:11px}.main{padding:25px 20px 24px}.topline{padding-bottom:8px;font-size:10px}.topline .pill{font-size:9px}.hero{padding:30px 0 34px;grid-template-columns:1fr 95px;gap:8px}h1{font-size:32px;letter-spacing:-1.3px}.hero p{font-size:12px;line-height:1.9}.word-art{height:130px;transform:scale(.7);transform-origin:center right;width:115px;margin-left:-20px}.eyebrow{font-size:9px;margin-bottom:15px;letter-spacing:1.8px}.grid{gap:12px}.set-card{padding:16px;min-height:190px;border-radius:16px}.set-card h3{font-size:14px}.set-symbol{width:30px;height:33px}.set-symbol svg{width:17px;height:17px}.section-heading h2{font-size:17px}.count{font-size:10px}.toolbar .actions{width:100%;justify-content:space-between}.search{max-width:none}.selection-help{display:none}.section-bar{gap:8px}.section-bar .btn{padding:9px 12px;font-size:11px}.selected-bar{padding:12px;font-size:11px;flex-wrap:wrap}.footer{margin-top:40px}.flow{margin-top:22px}.flow-title h1{font-size:29px}.mode-grid{gap:12px}.mode-card{padding:23px 17px}.direction{font-size:24px}.direction .arrow{padding:0 4px}.mode-card h3{font-size:16px}.count-grid{gap:7px}.count-btn{font-size:16px;padding:17px 4px}.flow-bottom{align-items:flex-start;flex-direction:column}.flow-bottom .btn{width:100%}.quiz{margin-top:20px}.question-card{padding:28px 20px;min-height:180px}.options{gap:10px;margin-top:18px}.option{padding:13px;gap:8px;font-size:14px;min-height:75px}.option .letter{width:22px;height:22px}.quiz-meta{font-size:10px}.typing-form{grid-template-columns:1fr}.typing-form input{font-size:18px}.result-hero h1{font-size:29px}.editor-layout{grid-template-columns:1fr}.set-list{flex-direction:row;overflow:auto;padding-bottom:8px;max-height:150px}.set-list button{min-width:140px;max-width:210px;flex-shrink:0}.edit-heading h1{font-size:29px}.editor-actions{bottom:10px;flex-wrap:wrap}.editor-actions .muted{width:100%}.word-fields{grid-template-columns:1fr 1fr}.word-fields .wide{grid-column:1/-1}.editor-toolbar{gap:10px}.editor-toolbar .actions{width:auto}.login-card{margin:25px auto;padding:26px}.login-card h1{font-size:27px}dialog{padding:26px}.modal-actions .btn{flex:1}.feedback{padding:18px}.flow-title .pill{margin-bottom:15px}}
@media(max-width:400px){.main{padding-left:15px;padding-right:15px}.sidebar{padding-left:15px;padding-right:15px}.hero{grid-template-columns:1fr}.word-art{display:none}.word-fields{grid-template-columns:1fr}.word-fields .wide{grid-column:auto}.options{grid-template-columns:1fr}.grid{gap:10px}.set-card{padding:13px}.count-grid{grid-template-columns:repeat(3,1fr)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.set-card:hover{transform:none}}

:focus,:focus-visible{outline:none!important;box-shadow:none!important;-webkit-focus-ring-color:transparent}
.settings-trigger{display:flex;align-items:center;gap:11px;width:100%;border:1px solid var(--line);border-radius:11px;padding:12px 14px;background:transparent;color:var(--muted);font-size:13px;text-align:left}
.settings-trigger:hover{color:var(--ink);background:var(--sage)}
.settings-section{display:grid;gap:18px;padding:23px 0;border-bottom:1px solid var(--line)}
.settings-section h3{font-size:14px}.settings-buttons{display:flex;gap:10px;flex-wrap:wrap}.settings-section .notice{margin-top:0}.settings-section select{width:100%}.settings-section>button{justify-self:start}
dialog{max-height:calc(100dvh - 40px);overflow-y:auto}.settings-section p{margin-top:0}
@media(max-width:760px){.sidebar-bottom{width:auto;margin-left:auto;padding-top:0}.settings-trigger{padding:9px;font-size:0;border:0;width:36px;height:36px}.settings-trigger svg{width:20px;height:20px}.sidebar{gap:7px}.nav{margin-left:auto}.settings-buttons .btn{flex:1}.side-caption{display:none}}
.activity-icon{display:grid;place-items:center;width:46px;height:46px;border-radius:13px;background:var(--sage);color:var(--green)}.activity-icon svg{width:24px;height:24px}.order-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:25px 0}.order-grid .mode-card{padding:22px 18px;gap:12px}.order-grid .mode-card.active{border-color:var(--green);background:var(--sage)}.order-grid .mode-card h3{font-size:16px}.flashcards-view{max-width:720px;margin:16px auto}.flashcard{display:block;position:relative;width:100%;height:clamp(270px,40dvh,380px);padding:0;border:0;border-radius:24px;background:transparent;perspective:1400px;touch-action:pan-y pinch-zoom;-webkit-user-select:none;user-select:none;transition:transform .16s ease-out}.flashcard-inner{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.2,.7,.25,1)}.flashcard.is-flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;padding:30px 24px;border:1px solid var(--line);border-radius:24px;background:var(--surface);backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden}.flashcard-front{transform:rotateY(0deg)}.flashcard-back{transform:rotateY(180deg);background:var(--sage);border-color:var(--success-line)}.flashcard-face .eyebrow{margin:0;color:var(--muted)}.flashcard-text{font-size:clamp(25px,4.5vw,45px);letter-spacing:-.8px;font-weight:650;line-height:1.5;overflow-wrap:anywhere;white-space:pre-line;max-width:100%;max-height:calc(100% - 95px);overflow-y:auto;flex-shrink:1}.flashcard-hint{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted);font-weight:400}.flashcard-hint svg{width:14px;height:14px}.flashcard-controls{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:22px}.swipe-hint{text-align:center;font-size:11px;line-height:1.9;color:var(--muted);margin-top:20px}.card-explanation{margin-top:24px;border:1px solid var(--line);border-radius:15px;background:var(--surface);padding:20px 22px}.card-explanation small{font-size:11px}.card-explanation p{font-size:13px;white-space:pre-line;overflow-wrap:anywhere;margin-top:9px}.cards-exit{margin-top:28px}.cards-exit .btn{font-size:12px}
@media(max-width:760px){.order-grid{grid-template-columns:1fr;gap:10px}.order-grid .mode-card{padding:17px 18px;gap:6px}.flashcards-view{margin-top:20px}.flashcard-face{padding:24px 20px}.flashcard-controls .btn{padding:11px 13px;font-size:12px}.flashcard-controls .count{font-size:10px}.swipe-hint{font-size:10px}.card-explanation{padding:17px}.order-grid+.flow-bottom{margin-top:24px}}
.manage-set-list{display:grid;gap:10px;max-height:45dvh;overflow-y:auto;margin:22px 0 8px}.manage-set-row{display:grid;grid-template-columns:23px minmax(0,1fr) auto;align-items:center;gap:10px;padding:13px 10px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}.manage-position{font-size:11px;color:var(--muted);text-align:center}.manage-set-title{font-size:13px;font-weight:600;overflow-wrap:anywhere;line-height:1.6}.manage-set-title small{display:block;font-weight:400;font-size:10px;margin-top:4px}.manage-controls{display:flex;gap:2px}.manage-controls .icon-btn{padding:8px}.manage-controls .icon-btn svg{width:17px;height:17px}.manage-delete{color:var(--red)}.manage-confirm{margin-top:24px;border-top:1px solid var(--line);padding-top:22px}.manage-confirm h3{font-size:17px}.manage-confirm p{overflow-wrap:anywhere}
@media(max-width:400px){.manage-set-row{grid-template-columns:18px minmax(0,1fr);gap:7px}.manage-controls{grid-column:2;justify-content:flex-end}.manage-set-list{max-height:40dvh}}