:root{--ink:#272322;--muted:#726d68;--red:#a13732;--deep-red:#842723;--paper:#f7f5f0;--line:#ddd8ce;--white:#fff;--soft:#eeeae2;--jp:'Noto Sans JP',sans-serif;--display:'Cormorant Garamond',Georgia,serif;--body:'Libre Baskerville',Georgia,serif}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);line-height:1.65}button,select{font:inherit}button{cursor:pointer}button:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #c75e55;outline-offset:3px}[hidden]{display:none!important}
.site-shell{max-width:1400px;margin:auto;min-height:100vh;padding:0 clamp(22px,4vw,64px)}.topbar{height:92px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:14px;font-family:var(--display);font-weight:700;font-size:25px;letter-spacing:.11em;line-height:1}.brand-mark{width:38px;height:38px;border:1px solid var(--red);border-radius:50%;display:grid;place-items:center;color:var(--red);font-family:var(--jp);font-size:21px;font-weight:500;letter-spacing:0}.brand small{display:block;font-family:var(--body);font-size:9px;letter-spacing:.035em;color:var(--muted);font-weight:400;margin-top:5px}.edition,.eyebrow,.example-label{font-family:var(--jp);font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--red)}.edition span{padding:0 7px;color:#a4a09a}
.main-layout{display:grid;grid-template-columns:minmax(275px,350px) minmax(0,1fr);gap:clamp(40px,7vw,110px);padding:clamp(34px,5vw,70px) 0 50px}.settings{max-width:355px}.eyebrow-line{display:inline-block;width:18px;height:1px;background:var(--red);vertical-align:middle;margin-right:8px}.settings h1{font-family:var(--display);font-size:clamp(48px,5.5vw,72px);line-height:.94;letter-spacing:-.035em;font-weight:600;margin:22px 0 23px}.settings h1 em{color:var(--red);font-weight:500}.intro{color:#625d57;font-size:14px;line-height:1.8;margin:0 0 42px}.control-block{margin:0 0 29px;padding:0;border:0}.control-block>label,.control-block legend{font-family:var(--jp);font-size:14px;font-weight:700;display:block;margin-bottom:12px}.select-wrap{position:relative}.select-wrap:after{content:'⌄';position:absolute;right:17px;top:10px;font-size:24px;line-height:1;pointer-events:none;color:var(--red)}select{width:100%;appearance:none;border:1px solid #c9c2b7;background:#fff;border-radius:3px;padding:14px 39px 14px 15px;color:var(--ink);font-family:var(--jp);font-size:14px}.field-help,.radio-row small,.privacy,.micro-tip{color:var(--muted);font-size:12px;line-height:1.65}.field-help{margin:7px 0 0}.radio-row{display:flex;align-items:flex-start;gap:11px;padding:12px 0;border-bottom:1px solid var(--line);font-family:var(--jp);cursor:pointer}.radio-row input{accent-color:var(--red);width:16px;height:16px;margin:4px 0 0;flex:none}.radio-row b{font-size:14px;font-weight:700}.radio-row small{display:block;margin-top:2px}.sidebar-stats{display:flex;gap:36px;margin:34px 0 19px}.sidebar-stats div{display:flex;flex-direction:column}.sidebar-stats strong{font:600 33px var(--display);line-height:1}.sidebar-stats span{font-size:11px;color:var(--muted);margin-top:7px}.new-session{border:0;background:none;border-bottom:1px solid var(--red);padding:5px 0;color:var(--red);font-family:var(--jp);font-size:13px;font-weight:700}.new-session span{font-size:17px;margin-left:6px}.new-session:hover{color:var(--deep-red);border-color:var(--deep-red)}.privacy{margin:24px 0 0}
.study-area{min-width:0;max-width:800px}.study-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:0 0 19px}.study-head h2{font:600 clamp(29px,3.1vw,39px)/1.05 var(--display);margin:7px 0 0}.session-count{color:var(--muted);font-size:13px;white-space:nowrap}.progress-track{height:3px;background:#dedbd4;margin-bottom:28px}.progress-track span{display:block;width:0;height:100%;background:var(--red);transition:width .28s ease}
.flashcard{background:var(--white);min-height:490px;border:1px solid #e4dfd6;box-shadow:0 20px 55px rgba(35,27,23,.055);display:flex;flex-direction:column;padding:clamp(24px,4vw,42px);position:relative}.flashcard:before{content:'';height:4px;background:var(--red);position:absolute;left:-1px;top:-1px;right:-1px}.card-top,.card-footer{display:flex;justify-content:space-between;gap:15px;font-family:var(--jp);font-size:11px;letter-spacing:.11em;color:var(--muted)}.card-top span:last-child{color:var(--red)}.question-label{font-family:var(--jp);font-size:14px;color:var(--muted);text-align:center;margin-top:75px}.word{font:500 clamp(44px,6.3vw,76px)/1.35 var(--jp);text-align:center;overflow-wrap:anywhere;margin:12px 0 15px}.answer{text-align:center;animation:enter .25s ease}.reading{font:500 21px/1.5 var(--jp);color:var(--red)}.meaning{font-size:17px;line-height:1.6;margin:8px 0 19px}.example-wrap{border-top:1px solid var(--line);padding:20px 2px 0;text-align:left;max-width:550px;margin:auto}.example-wrap p{font:400 16px/1.8 var(--jp);margin:7px 0 0;overflow-wrap:anywhere}.card-footer{margin-top:auto;padding-top:30px;letter-spacing:0}.card-number{font-family:var(--display);font-size:22px;line-height:1}.card-actions{min-height:88px;display:flex;align-items:flex-start;margin-top:18px}.reveal{border:0;background:var(--red);color:#fff;min-height:54px;padding:13px 27px;font-family:var(--jp);font-size:15px;font-weight:700;border-radius:3px;transition:background .2s,transform .2s}.reveal:hover{background:var(--deep-red);transform:translateY(-1px)}.ratings{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:100%;gap:10px}.ratings button{min-height:54px;background:#fff;border:1px solid var(--line);border-radius:3px;font-family:var(--jp);font-size:13px;font-weight:700;color:var(--ink);padding:9px;white-space:nowrap}.ratings button span{display:inline-block;margin-right:4px;color:var(--red);font-size:18px;vertical-align:-1px}.ratings button:hover{border-color:var(--red);background:#fff9f8}.ratings button:last-child{background:#e9eee8;border-color:#d6e0d3}.ratings button:last-child:hover{background:#dce9d8}.micro-tip{margin:8px 0 0;max-width:650px}.session-result{text-align:center;border:1px solid var(--line);background:#fff;padding:50px 20px;margin-top:20px}.result-symbol{font:38px var(--jp);color:var(--red)}.session-result h3{font:600 35px var(--display);margin:14px 0}.session-result p{font-size:14px;color:var(--muted)}.session-result button{margin-top:14px}.error{padding:15px;border:1px solid var(--red);color:var(--red);font-family:var(--jp)}.footer{border-top:1px solid var(--line);padding:20px 0 28px;display:flex;justify-content:space-between;gap:16px;font-family:var(--jp);font-size:11px;color:var(--muted)}
@keyframes enter{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media(max-width:800px){.main-layout{grid-template-columns:1fr;gap:34px;padding-top:35px}.settings{max-width:none}.settings h1{font-size:54px;margin:15px 0}.intro{margin-bottom:26px}.control-block{margin-bottom:20px}.sidebar-stats{margin:20px 0 12px}.privacy{margin-top:14px}.flashcard{min-height:440px}.question-label{margin-top:55px}}@media(max-width:500px){.site-shell{padding:0 18px}.topbar{height:75px}.brand{font-size:21px}.brand small{font-size:8px}.brand-mark{width:31px;height:31px;font-size:17px}.edition{font-size:9px;max-width:95px;text-align:right;line-height:1.5}.settings h1{font-size:50px}.study-head h2{font-size:31px}.flashcard{min-height:430px;padding:24px}.question-label{margin-top:54px}.word{font-size:48px}.ratings{gap:5px}.ratings button{font-size:11px;padding:6px 4px;white-space:normal}.ratings button span{display:block;margin:0 auto;line-height:1}.footer{font-size:10px}.intro,.example-wrap p{font-size:15px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}
.brand-logo{display:block;width:58px;height:58px;object-fit:contain;flex:none}
@media(max-width:500px){.brand{gap:7px;font-size:17px;letter-spacing:.06em}.brand-logo{width:48px;height:48px}.brand small{font-size:7px;letter-spacing:0}}

.header-links{display:flex;align-items:center;gap:24px}.header-links>a{font:500 14px var(--jp);color:var(--red);text-decoration:none;border-bottom:1px solid var(--red);padding:6px 0}.header-links>a:focus-visible{outline:3px solid var(--red);outline-offset:4px}@media(max-width:500px){.header-links{flex-direction:column;align-items:flex-end;gap:5px}.header-links>a{font-size:12px;padding:3px 0}}