@charset "UTF-8";
:root { --paper:#f7f6f0; --white:#fffefa; --ink:#252f2b; --muted:#637068; --line:#d5dad1; --green:#254b40; --serif:"Hiragino Mincho ProN","Yu Mincho",serif; --sans:"Hiragino Sans","Yu Gothic",system-ui,sans-serif; }
* { box-sizing:border-box; }
html { scroll-padding-top:24px; }
body { margin:0; background:var(--paper); color:var(--ink); font:15px/1.9 var(--sans); -webkit-font-smoothing:antialiased; overflow-wrap:anywhere; }
a { color:inherit; text-underline-offset:4px; }
button,input,textarea { font:inherit; }
button,a,input,textarea,summary { -webkit-tap-highlight-color:transparent; }
button,summary { cursor:pointer; }
button { color:inherit; }
button,a { touch-action:manipulation; }
button:disabled { cursor:default; }
textarea,input { accent-color:var(--green); }
textarea { display:block; width:100%; padding:15px 16px; resize:vertical; border:1px solid #aeb9b0; border-radius:6px; background:var(--white); color:var(--ink); line-height:1.9; font-size:16px; }
textarea::placeholder { color:#737c73; }
textarea:focus { border-color:var(--green); }
:focus-visible { outline:3px solid #a77538; outline-offset:4px; }
main:focus { outline:none; }
[hidden] { display:none!important; }
h1,h2,h3,p { margin:0; }
h1,h2,h3 { text-wrap:pretty; }
ol,ul { margin:0; padding:0; }
input[type=radio],input[type=checkbox] { width:19px; height:19px; flex:0 0 19px; margin:4px 0 0; }
.sr-only { position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0; }
.skip { position:fixed; top:-80px; left:15px; z-index:100; background:var(--green); color:white; padding:12px; }
.skip:focus { top:12px; }
.site-header { min-height:94px; width:min(1240px,calc(100% - 96px)); margin:auto; display:flex; justify-content:space-between; align-items:center; gap:20px; border-bottom:1px solid var(--line); }
.brand { text-decoration:none; display:flex; align-items:center; gap:13px; }
.brand-mark { font:italic 48px/1 Georgia,serif; color:var(--green); position:relative; width:43px; }
.brand-mark span { font:25px/1 var(--serif); position:absolute; bottom:0; right:-7px; }
.brand strong { font:500 21px/1.5 Georgia,serif; letter-spacing:.045em; display:block; }
.brand small { display:block; font-size:10px; letter-spacing:.13em; }
.site-header nav { display:flex; gap:28px; font-size:12px; }
.site-header nav a { text-decoration:none; padding:14px 0; border-bottom:1px solid transparent; }
.site-header nav a[aria-current] { border-bottom-color:var(--green); }
.site-header nav a:hover { color:var(--green); text-decoration:underline; }
main { width:min(1180px,calc(100% - 96px)); margin:auto; min-height:70vh; }
.eyebrow { font-size:10px; font-weight:600; letter-spacing:.17em; line-height:1.8; }
.edition { margin-left:15px; font-weight:400; letter-spacing:.08em; border:1px solid var(--line); padding:3px 8px; border-radius:3px; }
.home-intro { padding:52px 0 45px; display:grid; grid-template-columns:1.45fr 1fr; align-items:center; gap:100px; }
.home-intro h1 { font:500 clamp(32px,3.7vw,49px)/1.55 var(--serif); letter-spacing:.1em; margin-top:15px; }
.serif-italic { color:var(--green); }
.intro-copy { font-size:14px; color:var(--muted); line-height:1.9; margin-top:18px; }
.button { min-height:48px; display:inline-flex; align-items:center; justify-content:center; gap:32px; border:1px solid transparent; border-radius:5px; padding:11px 21px; font-size:13px; font-weight:500; text-decoration:none; line-height:1.7; }
.button.primary { background:var(--green); color:#fff; }
.button.primary:hover { background:#17392f; }
.button.secondary { border-color:#a5b2a7; background:var(--white); }
.button.secondary:hover { background:#edf0e9; }
.home-intro .button { margin-top:23px; }
.learning-note { background:#edeedc; position:relative; padding:28px 33px 24px; border-radius:2px 20px 2px 2px; border:1px solid #dfe2cb; transform:rotate(1deg); max-width:360px; justify-self:end; width:100%; }
.learning-note:before { content:""; position:absolute; top:-9px; left:calc(50% - 23px); width:46px; height:17px; background:#d4dbbc; opacity:.65; transform:rotate(-6deg); }
.note-index { font-size:9px; letter-spacing:.16em; color:#586341; }
.note-title { font:500 24px/1.6 var(--serif); margin:15px 0 11px; }
.learning-note > p:not(.note-title) { font-size:12px; color:#55624b; line-height:1.9; }
.progress-line { display:flex; align-items:baseline; gap:13px; margin-top:21px; }
.progress-line strong { font:36px/1 Georgia,serif; }
.progress-line strong span { font-size:17px; color:#68705e; }
.progress-line > span { font-size:10px; }
progress { display:block; height:5px; width:100%; margin:12px 0 15px; appearance:none; border:0; background:#d6dcc4; border-radius:5px; overflow:hidden; }
progress::-webkit-progress-bar { background:#d6dcc4; }
progress::-webkit-progress-value { background:#486348; }
progress::-moz-progress-bar { background:#486348; }
.fine { font-size:11px; color:var(--muted); line-height:1.8; }
.section-heading { display:flex; justify-content:space-between; align-items:end; gap:16px; }
.section-heading h2 { font:500 23px/1.8 var(--serif); margin-top:5px; letter-spacing:.045em; }
.section-heading > p { color:var(--muted); font-size:11px; }
.separator { padding:0 9px; color:#8a9286; }
.catalogue { padding-top:20px; border-top:1px solid var(--line); }
.filter-row { display:flex; gap:7px; margin:21px 0; }
.filter { border:1px solid var(--line); background:transparent; border-radius:30px; padding:7px 19px; min-height:40px; font-size:12px; }
.filter[aria-pressed=true] { background:var(--ink); color:white; border-color:var(--ink); }
.filter:hover:not([aria-pressed=true]) { background:#e9ece5; }
.track-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.read { --accent:#355573; --tint:#e8eef2; --wash:#d7e3ea; }
.write { --accent:#94502f; --tint:#f4e9de; --wash:#ecdbc8; }
.check { --accent:#48613b; --tint:#e9eddf; --wash:#d9e1c9; }
.track-card { border:1px solid var(--line); background:var(--white); border-radius:8px; overflow:hidden; min-width:0; }
.track-art { position:relative; height:177px; background:var(--tint); padding:21px; color:var(--accent); overflow:hidden; }
.track-number { font:30px/1.2 Georgia,serif; }
.track-number span { display:block; font:12px/1.7 var(--sans); margin-top:4px; letter-spacing:.15em; }
.track-illustration { position:absolute; height:146px; width:165px; right:15px; top:10px; fill:none; stroke:currentColor; stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; }
.art-wash { fill:var(--wash); stroke:none; opacity:.7; }
.art-caption { position:absolute; left:21px; bottom:14px; font-size:8px; letter-spacing:.18em; }
.track-copy { padding:22px 23px 20px; }
.track-copy h3 { font:600 21px/1.6 var(--serif); letter-spacing:.015em; }
.track-subtitle { font-size:12px; color:var(--accent); margin:9px 0 10px; }
.track-description { color:var(--muted); font-size:12px; min-height:68px; }
.lesson-list { list-style:none; padding:0 21px 8px; }
.lesson-list li { border-top:1px solid var(--line); }
.lesson-list a { text-decoration:none; display:flex; align-items:center; gap:9px; min-height:72px; padding:12px 0; }
.lesson-list a:hover .lesson-list-title { text-decoration:underline; color:var(--accent); }
.lesson-index { font:11px/1.5 Georgia,serif; color:var(--accent); }
.lesson-list-title { font-size:12px; font-weight:500; flex:1; }
.lesson-time { font-size:10px; color:var(--muted); flex-shrink:0; }
.lesson-time span { padding-left:9px; font-size:17px; color:var(--accent); }
.lesson-status { font-size:9px; padding:3px 6px; border-radius:4px; max-width:5.5em; text-align:center; line-height:1.7; }
.finished { background:#e5eedf; color:#35532c; }
.in-progress { background:#f4ebd6; color:#775626; }
.how-to { margin:48px 0 60px; padding:27px 0; border-block:1px solid var(--line); display:flex; flex-wrap:wrap; justify-content:space-between; gap:25px; align-items:center; }
.how-to h2 { font:500 20px/1.8 var(--serif); margin-top:5px; }
.how-to ol { display:flex; gap:25px; list-style:none; }
.how-to li b { display:block; font:17px/1.7 Georgia,serif; color:#83907b; }
.how-to li span { font-size:11px; }
.text-link { font-size:12px; text-decoration:none; border-bottom:1px solid currentColor; padding:5px 0; }
.text-link:hover { color:var(--green); }
.text-button { border:0; background:transparent; padding:12px 0; font-size:12px; text-decoration:underline; text-underline-offset:5px; }
.site-footer { width:min(1240px,calc(100% - 96px)); margin:0 auto; padding:25px 0 30px; border-top:1px solid var(--line); display:flex; gap:20px; justify-content:space-between; color:var(--muted); font-size:10px; }
.footer-dot { margin:0 14px; color:#a3ac9e; }
.storage-alert { max-width:1180px; margin:16px auto; border:1px solid #be8c56; border-radius:5px; padding:12px 20px; background:#fff2dc; color:#623d23; font-size:13px; }
.lesson-topline { display:flex; justify-content:space-between; gap:15px; padding-top:25px; }
.lesson-header { padding:30px 0; border-bottom:1px solid var(--line); }
.lesson-header .eyebrow { color:var(--accent); font-size:11px; letter-spacing:.06em; }
.lesson-pill { background:var(--tint); padding:5px 9px; border-radius:3px; margin-left:8px; }
.lesson-header h1 { font:500 clamp(26px,3.2vw,39px)/1.6 var(--serif); margin:13px 0 8px; }
.lesson-header > p:not(.eyebrow) { color:var(--muted); font-size:14px; }
.lesson-meta { display:flex; flex-wrap:wrap; gap:20px; margin-top:16px; color:var(--muted); font-size:11px; }
.lesson-columns { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1.16fr); gap:45px; padding:35px 0 60px; align-items:start; }
.reading-panel { position:sticky; top:25px; }
.mini-guide { padding:22px 24px; background:var(--tint); border-radius:6px; }
.mini-guide h2 { font-size:14px; margin-bottom:9px; color:var(--accent); }
.mini-guide > p { font-size:13px; }
details summary { padding:10px 0; font-size:12px; font-weight:500; }
details[open] summary { margin-bottom:7px; }
.worked-example { margin-top:7px; border-top:1px solid color-mix(in srgb,var(--accent) 20%,transparent); }
.worked-example p { font-size:13px; padding-bottom:5px; }
.source-block { margin-top:22px; padding:25px; background:var(--white); border:1px solid var(--line); border-radius:6px; }
.small-label { font-size:10px; font-weight:600; letter-spacing:.1em; color:var(--accent,var(--green)); }
.passage { list-style:none; margin:16px 0; }
.passage li { display:flex; align-items:baseline; gap:13px; margin:0 0 17px; font:500 17px/2 var(--serif); }
.sentence-number { font:11px/1.9 var(--sans); color:var(--accent); flex:0 0 15px; }
.ai-passage li { font-size:17px; }
.source-note { font-size:11px; color:var(--muted); line-height:1.8; padding-top:15px; border-top:1px solid var(--line); }
.source-card { background:var(--tint); padding:17px; border-radius:4px; margin:20px 0; }
.source-card h3 { font-size:12px; margin-bottom:7px; color:var(--accent); }
.source-card p { font-size:13px; line-height:2; }
.form-intro { margin-bottom:24px; }
.form-intro h2 { font:500 21px/1.7 var(--serif); margin:5px 0 7px; }
.muted { color:var(--muted); font-size:12px; }
fieldset { margin:0 0 24px; padding:0; border:0; min-width:0; }
fieldset legend { display:block; width:100%; font-weight:600; font-size:14px; line-height:1.9; margin-bottom:13px; }
.question-index { display:inline-block; color:var(--accent); margin-right:10px; font:14px/1.5 Georgia,serif; }
.choices { display:grid; gap:9px; }
.choice { display:flex; align-items:flex-start; gap:11px; padding:15px 16px; background:var(--white); border:1px solid var(--line); border-radius:6px; font-size:13px; cursor:pointer; }
.choice:has(input:checked) { background:var(--tint); border-color:var(--accent); }
.choice.correct-choice { border-color:var(--accent); }
.choice:has(input:disabled) { cursor:default; }
.choice input:disabled { opacity:.9; }
.correct-tag { flex:0 0 auto; font-size:10px; color:var(--accent); background:var(--tint); padding:1px 5px; margin-left:auto; }
.hint { margin-top:9px; }
.hint summary { font-weight:400; color:var(--accent); }
.hint p { font-size:12px; padding:12px; border-left:2px solid var(--accent); background:var(--tint); }
.form-error { color:#953d27; font-size:12px; margin:12px 0; }
.form-error:empty { display:none; }
.feedback-section { margin-top:32px; padding-top:27px; border-top:2px solid var(--accent); }
.feedback-section:focus,.completion:focus { outline:none; }
.feedback-section h2 { font:500 23px/1.7 var(--serif); margin:5px 0 22px; }
.answer-note { padding:20px; background:var(--white); border:1px solid var(--line); border-radius:6px; margin-bottom:15px; }
.answer-note h3 { font-size:14px; margin-bottom:10px; }
.answer-symbol { color:var(--accent); margin-right:8px; }
.answer-note p { font-size:13px; }
.answer-note .your-answer { font-size:11px; color:var(--muted); margin-bottom:10px; }
.answer-explanation { border-top:1px solid var(--line); padding-top:12px; margin-top:12px; }
.takeaway { background:var(--tint); border-radius:5px; padding:19px 21px; margin:24px 0; }
.takeaway span { font-size:11px; color:var(--accent); font-weight:600; }
.takeaway p { font:500 18px/1.8 var(--serif); margin-top:6px; }
.reflection-form label { display:block; margin:0 0 12px; }
.reflection-form label strong { display:block; font-size:14px; margin-top:6px; }
.reflection-form .fine { margin:10px 0 18px; }
.completion { margin-top:30px; padding:25px; border:1px solid #b2c3ab; border-radius:6px; background:#edf2e8; }
.completion-check { display:inline-flex; align-items:center; justify-content:center; width:32px; height:32px; border-radius:50%; background:var(--green); color:white; margin-bottom:12px; }
.completion h2 { font:500 24px/1.7 var(--serif); margin:8px 0; }
.completion > p:not(.small-label) { font-size:12px; }
.completion-actions { display:flex; flex-wrap:wrap; align-items:center; gap:16px; margin-top:18px; }
.essay-prompt { font:500 20px/1.9 var(--serif); margin:15px 0; }
.writing-field { margin-bottom:22px; }
.writing-field label { font-size:14px; font-weight:600; }
.field-help { font-size:12px; color:var(--muted); margin:5px 0 9px; }
.draft-panel { padding:20px; background:var(--tint); border:1px solid #decbbb; border-radius:6px; }
.draft-panel > div { display:flex; justify-content:space-between; align-items:center; gap:12px; }
.draft-panel h3 { font-size:13px; }
#char-count { font-size:13px; color:var(--accent); }
#draft-preview { white-space:pre-wrap; line-height:2.1; font-size:14px; margin:15px 0; }
.save-note { font-size:11px; color:var(--muted); margin:14px 0; }
.model-answer { background:var(--white); border:1px solid var(--line); padding:22px; border-radius:6px; }
.model-answer .small-label span { display:block; color:var(--muted); font-weight:400; margin-top:3px; }
.model-answer > p:nth-child(2) { font:500 16px/2.2 var(--serif); margin:16px 0; }
.model-note { border-top:1px solid var(--line); padding-top:15px; font-size:12px; }
.self-check { margin-top:23px; }
.self-check label { display:flex; align-items:flex-start; gap:11px; font-size:13px; padding:14px 0; border-bottom:1px solid var(--line); }
.self-check .fine { margin-top:12px; }
.guide { max-width:900px; margin:25px auto 60px; }
.guide > .eyebrow { margin-top:35px; }
.guide h1 { font:500 clamp(27px,3.4vw,42px)/1.7 var(--serif); margin:16px 0; }
.guide-lead { color:var(--muted); font-size:14px; }
.guide > section { margin-top:35px; padding-top:30px; border-top:1px solid var(--line); }
.guide section > h2 { font:500 24px/1.7 var(--serif); margin-bottom:16px; }
.guide section > p { font-size:13px; margin:15px 0; }
.teaching-steps { list-style:none; margin:20px 0; }
.teaching-steps li { display:flex; gap:25px; padding:15px 0; border-bottom:1px solid var(--line); }
.teaching-steps li > strong { font:22px/1.5 var(--serif); color:var(--green); flex-shrink:0; }
.teaching-steps h3 { font-size:14px; }
.teaching-steps p { font-size:12px; color:var(--muted); }
.guide-track-list { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-top:24px; }
.guide-track { padding:20px; background:var(--tint); border-radius:5px; }
.track-label { color:var(--accent); font-size:11px; }
.guide-track h3 { font:600 19px/1.8 var(--serif); margin:5px 0 10px; }
.guide-track > p { font-size:12px; }
.guide-track ul { list-style:none; }
.guide-track li { border-top:1px solid #c4cbbf; margin-top:18px; padding-top:15px; }
.guide-track li a { font-size:12px; }
.guide-track li p { font-size:11px; color:var(--muted); margin-top:7px; }
.guide-points { margin-left:18px; font-size:13px; }
.guide-points li { margin:12px 0; }
.source-links { font-size:12px; padding-left:18px; }
.source-links li { margin:10px 0; }
.danger { color:#913b29; border:1px solid #ba9e8d; background:#fffaf4; }
dialog { border:1px solid var(--line); border-radius:8px; padding:28px; max-width:480px; width:calc(100% - 32px); background:var(--white); color:var(--ink); }
dialog::backdrop { background:#1d302b88; }
dialog h2 { font-size:20px; margin-bottom:12px; }
dialog p { font-size:13px; }
.dialog-actions { display:flex; justify-content:flex-end; gap:15px; margin-top:22px; }
@media (min-width:1450px) { .home-intro { gap:160px; } }
@media (max-width:1050px) { .site-header,main,.site-footer { width:calc(100% - 56px); } .home-intro { gap:50px; } .track-grid { gap:15px; } .track-copy { padding:20px 17px; } .track-copy h3 { font-size:19px; } .lesson-list { padding-inline:15px; } .lesson-list a { flex-wrap:wrap; column-gap:7px; } .lesson-list-title { flex-basis:calc(100% - 30px); } .lesson-time,.lesson-status { margin-left:20px; } .lesson-status { max-width:none; } .track-description { min-height:92px; } .lesson-columns { gap:25px; } .source-block { padding:19px; } .passage li { font-size:16px; } .learning-note { padding:25px; } }
@media (max-width:760px) {
  body { font-size:14px; }
  .site-header,main,.site-footer { width:calc(100% - 36px); }
  .site-header { min-height:82px; flex-wrap:wrap; padding:13px 0; gap:9px; }
  .brand-mark { font-size:38px; width:34px; }
  .brand strong { font-size:18px; }
  .brand small { font-size:9px; }
  .site-header nav { gap:16px; font-size:10px; }
  .site-header nav a { padding:10px 0; }
  .home-intro { grid-template-columns:1fr; gap:25px; padding:30px 0; }
  .home-intro h1 { font-size:36px; margin-top:13px; letter-spacing:.06em; }
  .intro-copy { margin-top:15px; }
  .learning-note { transform:none; max-width:none; padding:20px 23px; display:grid; grid-template-columns:1fr 1fr; column-gap:22px; align-items:start; }
  .learning-note .note-index { grid-column:1; }
  .learning-note .note-title { grid-column:1; font-size:20px; margin:8px 0; }
  .learning-note > p:not(.note-title):not(.fine) { grid-column:1; font-size:11px; }
  .progress-line { grid-column:2; grid-row:1/3; display:block; margin-top:8px; }
  .progress-line > span { display:block; margin-top:10px; font-size:9px; }
  .learning-note progress { grid-column:2; grid-row:3; margin-top:4px; }
  .learning-note .fine { grid-column:1/-1; border-top:1px solid #d1d7bd; padding-top:10px; margin-top:14px; font-size:10px!important; }
  .learning-note .fine br { display:none; }
  .learning-note { display:block; padding:17px 21px; }
  .learning-note .note-title,.learning-note > p:not(.fine) { display:none; }
  .learning-note .progress-line { display:flex; align-items:baseline; gap:15px; margin-top:9px; }
  .learning-note .progress-line > span { font-size:10px; margin-top:0; }
  .learning-note progress { margin:12px 0; }
  .learning-note .fine { padding-top:0; border:0; margin-top:8px; }
  .section-heading { align-items:start; flex-direction:column; gap:5px; }
  .section-heading h2 { font-size:23px; }
  .section-heading > p { font-size:10px; }
  .track-grid { grid-template-columns:1fr; gap:22px; }
  .track-art { height:154px; }
  .track-illustration { top:0; right:30px; }
  .track-number { font-size:32px; }
  .track-copy { padding:21px 23px 16px; }
  .track-copy h3 { font-size:24px; }
  .track-description { min-height:0; font-size:13px; }
  .track-subtitle { font-size:13px; }
  .lesson-list { padding:0 23px 9px; }
  .lesson-list a { flex-wrap:nowrap; min-height:68px; gap:9px; }
  .lesson-list-title { flex-basis:auto; font-size:13px; }
  .lesson-time,.lesson-status { margin-left:0; }
  .filter-row { margin:17px 0 20px; gap:6px; }
  .filter { padding:7px 17px; }
  .how-to { display:block; margin:30px 0; padding:25px 0; }
  .how-to ol { display:grid; grid-template-columns:1fr 1fr; margin:20px 0; gap:15px; }
  .how-to li b { display:inline-block; margin-right:13px; }
  .site-footer { display:block; line-height:2.4; padding:18px 0; }
  .site-footer > span { display:block; }
  .lesson-topline { padding-top:17px; align-items:center; }
  .lesson-topline .text-link { font-size:10px; }
  .lesson-header { padding:23px 0; }
  .lesson-header h1 { font-size:28px; }
  .lesson-header .eyebrow { font-size:9px; letter-spacing:0; }
  .lesson-header > p:not(.eyebrow) { font-size:13px; }
  .lesson-meta { font-size:10px; gap:12px; }
  .lesson-columns { grid-template-columns:1fr; gap:27px; padding:24px 0 40px; }
  .reading-panel { position:static; }
  .source-block { padding:21px; margin-top:17px; }
  .passage li { font-size:17px; }
  .mini-guide { padding:20px; }
  .form-intro h2 { font-size:22px; }
  .choice { font-size:14px; padding:15px; }
  .guide { margin-top:22px; }
  .guide-lead { font-size:13px; }
  .guide-track-list { grid-template-columns:1fr; }
  .guide .section-heading .button { margin-top:10px; }
  .storage-alert { margin:12px 18px; }
}
@media (max-width:370px) { .site-header { gap:8px; } .site-header nav { width:100%; justify-content:flex-end; } .home-intro h1 { font-size:31px; } .learning-note { column-gap:12px; padding:17px; } .note-title { font-size:18px!important; } .filter { padding-inline:13px; } .lesson-list-title { font-size:12px; } .lesson-pill { margin-left:3px; } .lesson-topline { gap:10px; } }
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { scroll-behavior:auto!important; transition:none!important; animation:none!important; } }

.self-check .check-item { margin: 18px 0; padding: 0; }
.self-check .check-item legend { font-size: 13px; }
.self-check .check-options { display:flex; flex-wrap:wrap; gap:12px; }
.self-check .check-options label { border:1px solid var(--line); border-radius:5px; padding:12px 16px; cursor:pointer; }
.next-practice { margin:24px 0; padding:20px; background:var(--paper); border-left:3px solid var(--green); font-size:13px; }
.next-practice h3 { font-size:16px; }
.recovery-download { display:block; margin:12px auto; }
.recovery-download[hidden] { display:none; }