:root{--bg:#fff3f7;--surface:#fff;--ink:#493d49;--muted:#806f7d;--accent:#df477b;--line:#efdbe4;--soft:#fbe3ec;--green:#377d68;font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button,input,textarea,select{font:inherit}button,.button{border:1px solid var(--line);border-radius:9px;padding:10px 16px;background:white;color:var(--ink);cursor:pointer;display:inline-block}button:hover{border-color:var(--accent)}button:disabled{opacity:.55;cursor:wait}.primary{background:var(--accent);border-color:var(--accent);color:white}.subtle{background:transparent}.site-header{display:flex;align-items:center;gap:35px;padding:22px 5%;border-bottom:1px solid var(--line);background:#fffafd}.brand{font-size:21px;font-weight:700;white-space:nowrap}.site-header nav{display:flex;gap:23px;flex:1;font-size:14px}.site-header nav a{color:var(--muted)}.site-header nav [aria-current]{color:var(--accent);font-weight:700}#account{font-size:13px;display:flex;gap:14px;align-items:center}.layout{max-width:1250px;margin:auto;display:grid;grid-template-columns:190px minmax(0,1fr);gap:42px;padding:42px 30px 70px}.module-title span{font:32px "Yu Mincho","Noto Serif JP",serif;color:var(--accent)}.module-title small{display:block;color:var(--muted);font-size:12px;margin:9px 0 28px}.study-nav{display:flex;flex-direction:column;gap:8px}.study-nav a{color:var(--muted);padding:12px 14px;border-radius:9px;font-size:14px}.study-nav a.active{background:var(--soft);color:var(--accent);font-weight:700}.sidebar-note{font-size:12px;color:var(--muted);line-height:1.9;margin:40px 14px}.page-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:28px}h1{font-size:29px;margin:0 0 10px;font-weight:650}h2{font-size:20px;margin:0 0 15px}h3{font-size:17px;margin:0 0 10px}p{line-height:1.8;margin:8px 0 16px;max-width:680px}small,.muted{color:var(--muted);font-size:13px}.hero{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:30px;position:relative;margin-bottom:24px}.hero .jp{font:26px/1.8 "Yu Mincho","Noto Serif JP",serif;margin:15px 0}.hero .actions{margin-top:24px}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.progress{height:5px;background:var(--soft);border-radius:5px;overflow:hidden;margin:20px 0 8px}.progress span{display:block;height:100%;background:var(--accent)}.task-list{border-top:1px solid var(--line)}.task{display:grid;grid-template-columns:44px minmax(0,1fr) auto;align-items:center;gap:16px;padding:23px 5px;border-bottom:1px solid var(--line)}.task-mark{font:24px "Yu Mincho",serif;color:var(--accent)}.task p{margin:3px 0 0}.task.done .task-mark{color:var(--green)}.task.done h3{color:var(--muted)}.mini-stats{display:flex;gap:35px;margin:25px 0;color:var(--muted);font-size:13px}.mini-stats b{font-size:19px;color:var(--ink);margin-right:5px}.panel{background:white;border:1px solid var(--line);padding:25px;border-radius:14px;margin:18px 0}.lesson-row{padding:19px 0;display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.lesson-row:last-child{border-bottom:0}.credit{font-size:12px;line-height:1.8;color:var(--muted);margin-top:25px}.flashcard{text-align:center;min-height:280px;display:flex;flex-direction:column;justify-content:center;align-items:center}.word{font:46px/1.5 "Yu Mincho","Noto Serif JP",serif}.reading{font:17px/1.8 "Yu Mincho",serif;color:var(--muted)}.meaning{font-size:20px;margin:16px}.example{font:20px/1.8 "Yu Mincho",serif}.rating{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:24px}label{display:block;font-size:14px;margin:18px 0 8px}input,select,textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:white;color:var(--ink)}input[type=checkbox]{width:auto;margin-right:10px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.empty{padding:35px;background:white;border:1px solid var(--line);border-radius:15px}.empty p{max-width:600px}.notice{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;border-radius:10px;padding:14px 24px;z-index:20;max-width:90vw;line-height:1.7}dialog{border:1px solid var(--line);border-radius:18px;width:min(850px,94vw);max-height:91vh;padding:32px;color:var(--ink)}dialog::backdrop{background:rgba(50,35,45,.4)}.close{position:absolute;right:14px;top:10px;border:0;font-size:27px;padding:3px 10px}.steps{padding-left:24px;line-height:2}.grammar{border-left:3px solid var(--accent);padding:5px 18px;margin:22px 0;background:var(--bg)}.quiz{margin:24px 0}.quiz button{display:block;text-align:left;width:100%;margin:9px 0}.answer{color:var(--green);line-height:1.8}.audio-list{display:grid;gap:10px;margin-top:16px}.audio-list label{margin:5px 0}.audio-list audio{width:100%;height:38px}.pdf-frame{width:100%;height:480px;border:1px solid var(--line);border-radius:8px;margin-top:15px}.material-text{white-space:pre-wrap;overflow-wrap:anywhere;font:20px/2 "Yu Mincho","Noto Serif JP",serif}.error{color:#a62c53}.loading{padding:50px;text-align:center;color:var(--muted)}:focus-visible{outline:3px solid #b92967;outline-offset:3px}.history-row{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line)}.file-input{border:0;padding:0}.timer{color:var(--accent);font-variant-numeric:tabular-nums;margin-left:auto}.pill{font-size:12px;color:var(--green)}
@media(max-width:800px){.site-header{padding:18px;gap:15px;flex-wrap:wrap}.site-header nav{gap:17px;order:3;width:100%;font-size:13px}.site-header #account{margin-left:auto}.layout{display:block;padding:22px 18px}.module-title,.sidebar-note{display:none}.study-nav{flex-direction:row;overflow:auto;gap:5px;margin-bottom:25px;white-space:nowrap}.study-nav a{padding:9px 12px}.hero{padding:23px}.hero .jp{font-size:23px}.task{grid-template-columns:26px 1fr;gap:10px}.task>button{grid-column:2;justify-self:start}.form-grid{grid-template-columns:1fr}.mini-stats{gap:20px;flex-wrap:wrap}dialog{padding:27px 20px}.pdf-frame{height:350px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

.reader-text{margin:25px 0}.reader-paragraph{padding:18px 15px;border-left:3px solid transparent;border-bottom:1px solid var(--line)}.reader-paragraph.current{border-left-color:var(--accent);background:var(--bg)}.reader-paragraph p{margin:0 0 10px}.reader-paragraph button{font-size:12px;padding:6px 10px}.panel>summary{cursor:pointer;line-height:1.8}.lesson-row>div:first-child{min-width:0}.lesson-row .actions{justify-content:flex-end;flex-shrink:0}.lesson-row h3{line-height:1.8;overflow-wrap:anywhere}@media(max-width:600px){.lesson-row{flex-direction:column}.lesson-row .actions{justify-content:flex-start}.reader-paragraph{padding:15px 10px}.material-text{font-size:19px}}