@charset "UTF-8";
:root{--paper:#f5f1e8;--ink:#273a3b;--muted:#6b7470;--line:#d9d4c8;--red:#95524a;--cream:#eae2cf;--serif:"Yu Mincho","Hiragino Mincho ProN",Georgia,serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.9 "Yu Gothic",Meiryo,sans-serif}a{color:inherit;text-underline-offset:5px}button{font:inherit;cursor:pointer}button:disabled{cursor:default;opacity:.5}a,button,summary{touch-action:manipulation}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--red);outline-offset:5px}.skip{position:absolute;top:-100px}.skip:focus{top:0;background:#fff;padding:10px;z-index:10}.site-header,footer{max-width:1320px;margin:auto;padding:25px 48px;display:flex;align-items:center;justify-content:space-between;gap:25px}.site-header{border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:16px;font-weight:bold;white-space:nowrap}.brand-seal{display:grid;place-items:center;width:35px;height:38px;border:1px solid var(--red);color:var(--red);font:22px var(--serif)}.site-header nav{display:flex;gap:28px;font-size:13px}.site-header nav a{text-decoration:none}main{max-width:1224px;padding:0 48px;margin:auto}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:70px;padding:78px 0 66px;align-items:center}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.16em;color:var(--red);margin:0 0 18px}h1,h2,h3{font-family:var(--serif);font-weight:500}h1{font-size:clamp(36px,4.3vw,62px);line-height:1.65;letter-spacing:.04em;margin:0 0 26px}.intro{font-size:16px;color:var(--muted);margin:0 0 32px}.primary{display:inline-flex;align-items:center;justify-content:space-between;gap:32px;border:1px solid var(--ink);background:var(--ink);color:#fff;padding:12px 24px;text-decoration:none;font-size:15px;border-radius:2px}.primary:hover{background:#405654}.hero-art{height:410px;position:relative;overflow:hidden;background:#e9e2d1;border:1px solid #d4c8b1}.hero-art:before{content:"";position:absolute;inset:16px;border:1px solid #d1c5af}.moon{position:absolute;left:17%;top:64px;width:190px;height:190px;background:#f7f3e9;border-radius:50%;box-shadow:inset -20px 0 0 #d5c8a9}.vertical-title{position:absolute;writing-mode:vertical-rl;right:18%;top:36px;font:30px/1.5 var(--serif);letter-spacing:.2em}.art-caption{position:absolute;bottom:27px;left:32px;font-size:12px;letter-spacing:.12em}.art-number{position:absolute;left:32px;bottom:80px;color:#95524a;font:54px var(--serif);letter-spacing:.15em}.calendar-note{display:grid;grid-template-columns:250px 1fr;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:24px 0;font-size:13px}.calendar-note strong{font-weight:600}.calendar-note p{margin:0;color:var(--muted)}.calendar-note a{white-space:nowrap}.month-index,.tips,.about{padding-top:76px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:24px}.section-heading h2,.quiz h2{font-size:32px;margin:0;line-height:1.6}.section-heading .eyebrow{margin-bottom:10px}.section-intro{font-size:14px;color:var(--muted);margin:18px 0 30px}#reading-toggle{font-size:13px;background:transparent;border:1px solid var(--line);padding:9px 14px;border-radius:3px}.month-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}.month-card{position:relative;padding:20px 24px 23px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-decoration:none;display:grid;grid-template-columns:1fr auto;transition:background .16s}.month-card:hover,.month-card:focus-visible{background:#e9e2d1}.month-no{font:22px Georgia,serif;color:var(--red)}.month-no small{font:11px sans-serif;margin-left:6px}.month-name{grid-column:1/-1;font:32px/1.6 var(--serif);margin-top:12px}.month-reading{grid-column:1;font-size:12px;letter-spacing:.16em;color:var(--muted)}.card-arrow{position:absolute;right:20px;top:18px;color:#87918c}.hide-readings .month-reading{visibility:hidden}.reading-layout{display:grid;grid-template-columns:164px minmax(0,1fr);gap:70px;margin-top:96px}.month-nav{position:sticky;top:26px;align-self:start;font-size:14px}.month-nav nav{display:grid;grid-template-columns:1fr 1fr;gap:4px}.month-nav nav a{text-decoration:none;padding:9px 5px;border-bottom:1px solid var(--line);border-radius:2px}.month-nav nav a span{font:11px Georgia;color:var(--muted);margin-right:6px}.month-nav nav a.current{background:var(--ink);color:white}.month-nav nav a.current span{color:#dbdfd6}.small-link{display:block;font-size:12px;margin-top:20px}.month-article{padding:38px 0;border-bottom:1px solid var(--line)}.month-article header{display:flex;gap:25px;align-items:center}.article-number{font:48px/1 Georgia;color:#b5a591}.month-article .eyebrow{margin:0 0 4px}.month-article h2{font-size:34px;margin:0;line-height:1.4}.month-article h2 small{display:inline-block;font:13px/1.7 sans-serif;color:var(--muted);margin-left:20px;letter-spacing:.12em}.memory-line{font:24px/1.8 var(--serif);margin:25px 0 3px}.memory-label{font-size:11px;color:var(--red);margin:0 0 24px}.original{border:1px solid var(--line);background:#f9f7f0}.original>summary{padding:13px 18px;font-size:14px}.original-body{padding:0 24px 20px;font-size:17px;overflow-wrap:anywhere}.original-body p{margin:1.2em 0}ruby rt{font-size:.55em}.editor-note{border-left:2px solid #b3a387;padding:10px 16px;font-size:13px;margin:20px 0;color:#62675f}.editor-note p{margin:4px 0}.editor-note strong{font-size:12px}summary{cursor:pointer}.source-note{margin:20px 0;padding:12px;border-top:1px solid var(--line)}.tip-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:28px}.tip-grid article{background:#ece7da;padding:30px}.tip-number{color:var(--red);font:16px Georgia}.tip-grid h3{font-size:25px;margin:12px 0}.tip-grid p,.tip-grid details{font-size:15px}.tip-grid .fine{font-size:12px;color:var(--muted)}.important{border-left:2px solid var(--red);padding-left:14px}.quiz{margin:80px 0 50px;padding:40px;background:#273a3b;color:#fff;display:grid;grid-template-columns:1fr 1.1fr;gap:48px}.quiz .eyebrow{color:#dcc3a8}.quiz p{font-size:14px;color:#d1d7cf}.quiz-box{background:#f7f4ec;color:var(--ink);padding:26px}.quiz-box #quiz-progress{color:var(--red);margin:0;font:13px Georgia}.quiz-box h3{font-size:27px;margin:12px 0 22px}.quiz-box #quiz-choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}.quiz-box #quiz-choices button{font:19px var(--serif);padding:14px;border:1px solid var(--line);background:transparent;color:var(--ink)}.quiz-box #quiz-choices button:disabled{opacity:1}.quiz-box #quiz-choices .correct{background:#dce8d6;border-color:#527350}.quiz-box #quiz-choices .wrong{background:#eed9d2;border-color:#a55d50}.quiz-box #quiz-feedback{min-height:54px;color:var(--ink);font-size:13px}.quiz-box .primary{font-size:13px;padding:10px 18px}.extras{font-size:16px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0}.extras p{font-size:15px}.about{padding-bottom:60px;font-size:14px;color:var(--muted)}.about h2{font-size:23px;color:var(--ink)}.about li{margin:8px 0}footer{border-top:1px solid var(--line);font-size:12px}footer p{color:var(--muted)}
@media(max-width:900px){.hero{gap:30px}.hero-art{height:360px}.moon{width:140px;height:140px;left:14%;top:72px}.vertical-title{right:14%;font-size:26px}.reading-layout{gap:30px;grid-template-columns:140px minmax(0,1fr)}.calendar-note{grid-template-columns:1fr;gap:8px}.site-header nav{gap:16px}.quiz{gap:25px;padding:28px}}
@media(max-width:650px){body{font-size:17px}.site-header,footer{padding:18px 22px;flex-wrap:wrap;gap:16px}.site-header nav{font-size:12px;gap:18px;flex-wrap:wrap}main{padding:0 22px}.hero{grid-template-columns:1fr;padding:44px 0 34px;gap:30px}h1{font-size:36px}.hero-art{height:210px}.moon{width:120px;height:120px;top:38px;left:17%}.vertical-title{writing-mode:horizontal-tb;right:20px;top:16px;font-size:23px}.art-number{font-size:34px;left:auto;right:30px;bottom:52px}.art-caption{font-size:11px;bottom:16px;left:25px}.calendar-note{font-size:12px}.month-index,.tips,.about{padding-top:48px}.section-heading{align-items:flex-start;flex-direction:column;gap:15px}.section-heading h2,.quiz h2{font-size:27px}.month-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.month-card{padding:15px 10px}.month-name{font-size:25px}.month-no{font-size:18px}.month-reading{font-size:10px;letter-spacing:0}.card-arrow{right:10px;top:12px;font-size:13px}.reading-layout{display:block;margin-top:56px}.month-nav{position:static;margin-bottom:32px}.month-nav nav{grid-template-columns:repeat(4,1fr)}.month-nav .small-link{display:none}.month-article{padding:30px 0}.article-number{font-size:37px}.month-article h2{font-size:30px}.month-article h2 small{display:block;margin:8px 0 0}.memory-line{font-size:22px}.original-body{padding:0 17px 16px;font-size:17px}.tip-grid{grid-template-columns:1fr;gap:18px}.tip-grid article{padding:24px}.quiz{grid-template-columns:1fr;margin-top:50px;padding:24px 18px;gap:20px}.quiz-box{padding:20px}.quiz-box #quiz-choices button{font-size:18px}footer p{margin:0}.about ul{padding-left:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.month-card{transition:none}}
@media print{.site-header nav,.month-nav,#reading-toggle,.quiz,.primary{display:none}main{max-width:none;padding:0}.reading-layout{display:block}.hero-art{display:none}.hero{display:block;padding:20px 0}.month-article{break-inside:avoid}}
.explanation-heading{font-family:inherit;font-size:15px;font-weight:600;line-height:1.7;margin:0 0 14px}.original>.explanation-heading{padding:16px 24px 0;margin-bottom:0}.original-body{padding-top:1px}.source-note>.explanation-heading{font-size:14px}.tip-grid section{font-size:15px}

.ad{position:static;display:block;clear:both;min-width:0;width:100%;max-width:100%;margin:40px auto;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.ad-label{font-size:12px;color:var(--muted);margin-bottom:10px}.adsbygoogle{min-height:100px;max-width:100%}footer nav{display:flex;gap:16px;flex-wrap:wrap}@media print{.ad{display:none}}

/* Private review placeholder; follows normal document flow. */
.ad.ad-preview{position:static;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;box-sizing:border-box;width:100%;max-width:100%;min-width:0;min-height:180px;margin:32px auto;padding:24px 16px;border:2px dashed #9b641b;border-radius:12px;background:#fff4d9;color:#654311;text-align:center;box-shadow:none;transform:none}.ad-preview strong{font-size:20px}.ad-preview span{font-size:15px}.ad-preview small{font-size:13px;line-height:1.7}@media(max-width:600px){.ad.ad-preview{min-height:150px;margin:24px auto;padding:20px 12px}}

/* Compact overview with an independent ad rail; full explanations stay expanded. */
.calendar-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;max-width:1360px;padding:0 32px;align-items:start}
.calendar-content{min-width:0}
.calendar-ad-rail{position:sticky;top:24px;align-self:start;padding-top:24px;width:300px;max-width:100%}
.calendar-ad-rail .ad.ad-preview{width:300px;max-width:100%;min-height:250px;margin:0;padding:24px 16px}
.calendar-content .hero{grid-template-columns:minmax(0,1fr) 160px;gap:24px;padding:24px 0 18px}
.calendar-content h1{font-size:32px;line-height:1.4;margin:0 0 10px}
.calendar-content h1 br{display:none}
.calendar-content .hero .eyebrow{margin-bottom:8px}
.calendar-content .intro{font-size:14px;line-height:1.7;margin:0 0 12px}
.calendar-content .primary{padding:8px 16px;font-size:14px}
.calendar-content .hero-art{height:166px}
.calendar-content .hero-art:before{inset:8px}
.calendar-content .moon{width:74px;height:74px;left:20px;top:23px;box-shadow:inset -10px 0 0 #d5c8a9}
.calendar-content .vertical-title{right:17px;top:16px;font-size:16px;letter-spacing:.1em;writing-mode:vertical-rl}
.calendar-content .art-number{font-size:25px;left:20px;right:auto;bottom:22px}
.calendar-content .art-caption{display:none}
.calendar-content .month-index{padding-top:16px}
.calendar-content .section-heading h2{font-size:26px}
.calendar-content .section-heading .eyebrow{margin-bottom:4px}
.calendar-content .section-intro{margin:8px 0 14px}
.calendar-content .month-card{padding:10px 14px;min-height:96px}
.calendar-content .month-no{font-size:16px}
.calendar-content .month-name{font-size:27px;line-height:1.35;margin-top:2px}
.calendar-content .month-reading{font-size:12px;letter-spacing:.04em}
.calendar-content .card-arrow{right:12px;top:8px;font-size:13px}
.calendar-content .calendar-note{grid-template-columns:1fr;gap:6px;margin-top:24px;padding:16px 0}
.calendar-content .reading-layout{display:block;margin-top:40px}
.calendar-content .month-nav{position:static;margin-bottom:32px}
.calendar-content .month-nav nav{grid-template-columns:repeat(6,minmax(0,1fr))}
.calendar-content .month-nav .small-link{margin-top:10px}
.calendar-content .tip-grid{grid-template-columns:1fr;gap:20px}
.calendar-content .quiz{grid-template-columns:1fr;gap:20px}
@media(max-width:1000px){
 .calendar-layout{display:flex;flex-direction:column;gap:0;max-width:850px;padding:0 22px}
 .calendar-content{display:contents}
 .calendar-layout>*,.calendar-content>*{min-width:0;max-width:100%;width:100%}
 .calendar-content .hero{order:0}.calendar-content .month-index{order:1}
 .calendar-ad-rail{order:2;position:static;width:100%;padding:24px 0 0}
 .calendar-ad-rail .ad.ad-preview{width:100%;min-height:150px}
 .calendar-content .calendar-note{order:3}.calendar-content .reading-layout{order:4}
 .calendar-content .tips{order:5}.calendar-content .quiz{order:6}.calendar-content .about{order:7}
}
@media(max-width:650px){
 .calendar-layout{padding:0 16px}.calendar-content .hero{grid-template-columns:1fr;padding:22px 0 8px}
 .calendar-content .hero-art{display:none}.calendar-content h1{font-size:28px}
 .calendar-content .section-heading{flex-direction:row;align-items:center;flex-wrap:wrap;gap:8px}
 .calendar-content .section-heading h2{font-size:24px}
 .calendar-content .month-card{padding:10px;min-height:92px}
 .calendar-content .month-name{font-size:26px}
 .calendar-content .month-nav nav{grid-template-columns:repeat(3,minmax(0,1fr))}
 .calendar-content .month-article header{gap:14px}.calendar-content .original-body{padding-left:14px;padding-right:14px}
 footer nav{flex-wrap:wrap}
}
@media print{.calendar-layout{display:block}.calendar-content{display:block}.calendar-ad-rail{display:none}}

@media(max-width:1000px){.calendar-content .extras{order:7}.calendar-content .about{order:8}}

/* The overview teaches each month directly rather than duplicating a name-only index. */
.calendar-content .hero{display:block;padding:14px 0 10px}.calendar-content .hero-art,.calendar-content .hero .intro,.calendar-content .hero .primary{display:none}.calendar-content .hero h1{font-size:28px;margin:0}.calendar-content .hero .eyebrow{margin-bottom:4px}
.month-lessons h2{font-size:24px;margin:8px 0 4px}.lesson-guide{font-size:13px;color:var(--muted);margin:0 0 12px}
.month-lesson-table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:16px;line-height:1.5;background:#faf8f1}
.month-lesson-table caption{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.month-lesson-table th,.month-lesson-table td{padding:8px 14px;border:1px solid var(--line);vertical-align:middle;text-align:left}
.month-lesson-table th{width:190px;font-weight:500;background:#eee8da}.lesson-number{display:inline-block;width:38px;font-size:13px;color:var(--red)}
.month-lesson-table th a{font:21px/1.4 var(--serif);text-decoration:none;display:inline-flex;align-items:baseline;gap:8px}.month-lesson-table small{font:12px/1.4 sans-serif;color:var(--muted)}
.month-lesson-table tr:hover td{background:#f4eedf}
@media(max-width:1000px){.calendar-content .month-lessons{order:1}}
@media(max-width:650px){.calendar-content .hero h1{font-size:25px}.month-lessons h2{font-size:22px}.month-lesson-table th{width:116px}.month-lesson-table th,.month-lesson-table td{padding:9px 8px}.month-lesson-table{font-size:15px}.lesson-number{display:block;width:auto;font-size:12px}.month-lesson-table th a{display:flex;flex-direction:column;gap:1px;font-size:21px}.month-lesson-table td{overflow-wrap:anywhere}}