:root{--ink:#162f50;--muted:#52687c;--blue:#eaf3f9;--line:#d7e2eb;--accent:#f5cf88;--paper:#f7f9fc;--white:#fff;--error:#912c26}*{box-sizing:border-box}html{scroll-padding-top:24px}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.8}a{color:#175a8b;text-underline-offset:4px}a:hover{color:#102e4f}button,input,textarea{font:inherit}button,a,input,summary,textarea{touch-action:manipulation}button,summary{cursor:pointer}button:disabled{opacity:.65;cursor:wait}button{border:0}a,button{ -webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #b27312;outline-offset:4px}input:focus,textarea:focus{border-color:#326f9d}[hidden]{display:none!important}.skip{position:absolute;left:12px;top:-90px;background:white;padding:10px;z-index:5}.skip:focus{top:10px}.site-header{max-width:1160px;margin:auto;min-height:100px;display:flex;align-items:center;justify-content:space-between;padding:20px 28px;gap:20px}.brand{color:var(--ink);font-size:18px;font-weight:800;text-decoration:none;display:flex;gap:12px;align-items:center;line-height:1.5}.brand small{display:block;font-size:9px;letter-spacing:2px;color:var(--muted);font-weight:500}.brand-mark{font-family:serif;display:grid;place-items:center;background:var(--ink);border-radius:12px;color:var(--accent);width:42px;height:44px;font-size:31px}.site-header nav{display:flex;align-items:center;gap:25px;font-size:14px}.site-header nav a{text-decoration:none}.free{border:1px solid var(--line);border-radius:20px;padding:4px 13px;font-size:12px;white-space:nowrap}main{max-width:1104px;margin:0 auto;padding:0 24px}.hero{display:grid;grid-template-columns:1.4fr 1fr;align-items:center;gap:24px;padding:36px 8px 40px}.eyebrow{font-size:13px;letter-spacing:1.6px;font-weight:700;color:#496a87;margin:0 0 16px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,4vw,47px);line-height:1.5;letter-spacing:1px;margin-bottom:20px}h1 span{box-shadow:inset 0 -.25em 0 #e3bf7c66}.hero-lead{color:#425c74;line-height:2;font-size:16px;margin-bottom:20px}.hero-tags{display:flex;gap:8px;flex-wrap:wrap;font-size:11px;font-weight:700}.hero-tags span{padding:3px 10px;border-radius:5px;background:#e7eef5}.night-art{position:relative;height:245px;border-radius:50% 50% 16px 16px;background:linear-gradient(160deg,#e1ebf5,#eff5fa 80%);overflow:hidden;margin-left:15px}.moon{position:absolute;background:#f7dba4;width:57px;height:57px;border-radius:50%;right:61px;top:30px;box-shadow:0 0 0 12px #f9e9c859}.star{position:absolute;color:#748fa9}.s1{top:37px;left:60px;font-size:20px}.s2{top:80px;left:120px}.s3{top:100px;right:30px}.bus{position:absolute;bottom:63px;left:18%;width:235px;height:86px;background:#27486b;border-radius:18px 29px 7px 7px;border-bottom:6px solid #183652;transform:rotate(-2deg)}.windows{display:flex;gap:6px;padding:11px 13px 0}.windows i{display:block;background:#b6cfe0;width:40px;height:24px;border-radius:3px}.windows i:last-child{border-radius:2px 16px 2px 2px}.bus-stripe{height:3px;background:var(--accent);margin-top:10px}.bus>span{font-size:8px;color:white;letter-spacing:2px;position:absolute;left:17px;bottom:6px}.wheel{position:absolute;bottom:-13px;background:#203448;border:5px solid #718a9e;width:25px;height:25px;border-radius:50%}.w1{left:28px}.w2{right:28px}.road{height:2px;position:absolute;bottom:49px;width:85%;left:8%;background:#b2c4d3}.art-caption{position:absolute;bottom:12px;width:100%;text-align:center;font-size:11px;letter-spacing:2px;color:#617e96}.important-intro{display:flex;gap:12px;margin:0 0 24px;background:#eaf0f7;padding:15px 19px;border-radius:9px;font-size:13px;color:#3d5971}.important-intro>span{font-size:20px}.important-intro p{margin:0}.workspace{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.panel{border:1px solid var(--line);border-radius:16px;background:white;padding:29px;box-shadow:0 8px 30px #162f5005}.result-panel{background:#f0f5fa;min-height:628px}.section-heading{display:flex;align-items:center;gap:12px;margin-bottom:16px}.section-heading h2{font-size:19px;margin:0;letter-spacing:.2px}.step{border-radius:8px;background:var(--ink);color:#fff;padding:4px 9px;font-size:12px;font-weight:700}.step.light{background:#dce7f1;color:var(--ink)}.muted{color:var(--muted);font-size:13px}.input-panel>.muted{margin-bottom:24px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:14px;font-weight:700;padding:0;margin:0 0 15px}.required{font-size:11px;color:#72501e;background:#faefd9;margin-left:8px;padding:2px 6px;border-radius:3px}.field{margin-bottom:21px}label{display:block;font-weight:700;font-size:15px;margin-bottom:8px}input,textarea{width:100%;border:1px solid #aebfcf;border-radius:8px;background:#fff;color:var(--ink);padding:13px 14px;font-size:18px;line-height:1.5;min-height:54px}input::placeholder{color:#6f7d8b;font-size:16px}input[aria-invalid=true]{border:2px solid var(--error)}.field small{display:block;font-size:12px;color:var(--muted);line-height:1.7;margin-top:7px}.text-button{background:none;padding:8px 0;color:#175a8b;text-decoration:underline;text-underline-offset:4px;font-size:13px;min-height:44px}.sample-line{margin-top:-7px;margin-bottom:20px}.sample-line span{display:block;font-size:12px;color:#815514}.optional{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:24px}.optional summary{padding:18px 0;font-size:14px;font-weight:700}.optional summary span{font-size:11px;font-weight:400;background:#e9eef4;padding:3px 6px;margin-left:4px}.optional fieldset{padding-top:8px}.optional-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:12px}.optional-grid input{font-size:16px;padding:12px 9px}.optional-grid input::placeholder{font-size:13px}.optional-grid label{font-size:12px}.primary,.copy{display:block;width:100%;background:var(--ink);color:#fff;border-radius:9px;padding:15px;font-size:16px;font-weight:700;min-height:56px}.primary:hover,.copy:hover{background:#234e76}.primary span{margin-left:20px}.reset{display:block;padding:8px 10px;background:none;color:var(--muted);font-size:12px;min-height:44px;margin:5px auto 0}.local-note{margin:12px 0 0;text-align:center;color:var(--muted);font-size:11px}.empty-result{text-align:center;padding-top:27px}.calendar-icon{width:81px;border:1px solid #b3c8d9;border-radius:10px;overflow:hidden;margin:0 auto 20px;background:white}.calendar-icon span{display:block;background:#d6e5f1;padding:4px;font-size:8px;letter-spacing:1px}.calendar-icon b{display:block;font-size:34px;font-weight:400;padding:0 0 5px}.empty-result h3{font-size:19px;margin-bottom:10px}.empty-result>p{font-size:14px;color:var(--muted)}.example{border-top:1px dashed #b9cddd;margin:28px 20px 0;padding-top:24px;display:flex;flex-direction:column;gap:8px;font-size:14px}.example small{font-size:11px;color:var(--muted)}.example-arrow{color:#617d95;line-height:1}.example strong{font-size:19px}.result-input{font-size:12px;color:var(--muted);border-bottom:1px solid #d3dfeb;padding-bottom:16px}.result-input strong{display:block;color:var(--ink);font-size:17px;margin-top:5px}.actual{padding:9px 0 22px}.rollover{display:inline-block;background:var(--accent);padding:2px 9px;font-size:12px;font-weight:700;border-radius:4px;margin-bottom:12px}.actual h3{font-size:12px;font-weight:500;color:var(--muted);margin-bottom:5px}.actual-date{font-size:clamp(22px,2.5vw,31px);line-height:1.6;font-weight:800;letter-spacing:-.5px}.actual-time{font-size:36px;font-weight:800;line-height:1.6}.actual p{color:#4b6581;font-size:12px;margin:5px 0 0}.prep{padding:19px;background:white;border-radius:9px;margin-bottom:20px;border-left:4px solid #7197b8}.prep h3,.schedule h3{font-size:14px;margin:0 0 8px}.prep p{font-size:15px;font-weight:700;margin-bottom:8px}.prep small,.schedule small{display:block;font-size:12px;color:var(--muted);line-height:1.8}.warning{background:#fff8e9;border:1px solid #ead7b2;border-radius:8px;padding:17px;color:#65481f;font-size:13px;margin:18px 0}.warning>strong{font-size:14px}.warning p{margin:8px 0 0;line-height:1.9}.schedule{background:white;padding:18px;border-radius:9px}.schedule dl{font-size:13px;margin:8px 0}.schedule dt{font-size:11px;color:var(--muted)}.schedule dd{margin:0 0 12px;font-weight:700}.gap{padding-top:10px;border-top:1px solid var(--line);font-size:16px;font-weight:800}.copy{font-size:14px}.memo-button{display:block;margin:3px auto}#copy-status{font-size:13px;margin:10px 0 0}textarea{font-size:14px}#copy-fallback{margin-top:15px}.error{background:#fff0ef;border-left:4px solid var(--error);padding:14px;color:var(--error);font-size:14px;margin-bottom:20px}.reading{padding:70px 0 45px}.reading h2,.sources h2{font-size:25px;letter-spacing:.4px;margin-bottom:25px}.reading .eyebrow{font-size:10px;letter-spacing:2px;margin-bottom:10px}.guide-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.guide-cards article{padding:15px 0}.guide-num{font-size:12px;color:#69879e;display:block;border-bottom:1px solid #c7d6e2;padding-bottom:12px;margin-bottom:20px}.guide-cards h3{font-size:18px}.guide-cards p{font-size:14px;color:var(--muted)}.guide-cards a{font-size:12px;font-weight:700}.sources{padding:28px 30px;margin-bottom:60px;background:#edf2f7;border-radius:12px}.sources h2{font-size:20px;margin-bottom:10px}.sources p{font-size:13px;color:var(--muted)}.source-links{display:flex;flex-wrap:wrap;gap:12px 22px;font-size:12px}footer{border-top:1px solid var(--line);max-width:1104px;margin:0 auto;padding:30px 24px 35px}.footer-brand{color:var(--ink);font-size:15px;font-weight:700;text-decoration:none}footer nav{display:flex;flex-wrap:wrap;gap:10px 25px;margin:16px 0;font-size:12px}footer small{font-size:10px;color:var(--muted)}.document{max-width:850px;padding-top:30px;padding-bottom:45px}.document h1{font-size:32px;margin-top:28px}.back{font-size:13px}.lead{font-size:18px;line-height:2;color:var(--muted)}.document section{padding-top:30px}.document h2{font-size:24px;border-bottom:1px solid var(--line);padding-bottom:12px}.document p,.document li{font-size:16px;line-height:2}.document li{margin-bottom:10px}.document details{border-bottom:1px solid var(--line);padding:16px 0}.document summary{font-weight:700}.document details p{padding:14px 0 0;margin:0}.toc{display:flex;gap:10px 18px;flex-wrap:wrap;background:var(--blue);padding:20px;border-radius:10px;font-size:13px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:14px;background:white}caption{text-align:left;padding-bottom:12px}th,td{padding:12px;border:1px solid var(--line);text-align:left}th{background:var(--blue)}.about-list{display:grid;grid-template-columns:120px 1fr;gap:10px;font-size:14px}.about-list dt{font-weight:700}.about-list dd{margin:0}.primary-link{display:inline-block;background:var(--ink);color:white;padding:13px 20px;border-radius:9px;text-decoration:none}.primary-link:hover{color:white;background:#234e76}.updated{margin-top:40px;color:var(--muted);font-size:12px!important}
@media(max-width:760px){.site-header{padding:17px 20px;min-height:80px}.brand{font-size:15px;gap:9px}.brand-mark{width:35px;height:38px;font-size:27px}.brand small{font-size:7px;letter-spacing:1.5px}.site-header nav>a{display:none}.site-header nav{gap:0}.free{font-size:10px;padding:3px 8px}main{padding:0 18px}.hero{grid-template-columns:1fr;padding:24px 3px 27px;position:relative}.hero>div:first-child{position:relative;z-index:1}.hero h1{font-size:34px}.hero-lead{font-size:14px;line-height:2}.hero .eyebrow{font-size:11px;letter-spacing:1px}.night-art{display:none}.hero-tags{font-size:10px}.important-intro{font-size:12px;padding:13px;margin-bottom:18px}.workspace{grid-template-columns:1fr;gap:20px}.panel{padding:23px 20px;border-radius:12px}.result-panel{min-height:0}.section-heading h2{font-size:17px}.empty-result{padding:18px 0}.example{margin:20px 10px 0}.actual-date{font-size:26px}.actual-time{font-size:34px}.reading{padding-top:44px}.reading h2{font-size:22px}.guide-cards{grid-template-columns:1fr;gap:10px}.guide-cards article{padding:7px 0}.guide-num{margin-bottom:12px;padding-bottom:8px}.guide-cards h3{margin-bottom:8px}.sources{padding:23px 20px;margin-bottom:35px}.sources h2{font-size:18px}.source-links{flex-direction:column;font-size:13px}.document{padding-top:20px}.document h1{font-size:27px}.document h2{font-size:22px}.document p,.document li{font-size:15px}.document th,.document td{padding:9px;font-size:12px}.optional-grid{grid-template-columns:1fr}.optional-grid label{font-size:14px}.optional-grid input,.optional-grid input::placeholder{font-size:16px}.about-list{grid-template-columns:95px 1fr}footer{padding:24px 20px}footer nav{gap:13px 20px}.primary-link{font-size:14px}.hero-tags{gap:6px}}
@media(max-width:360px){.free{display:none}.hero h1{font-size:31px}.actual-date{font-size:23px}.section-heading{gap:8px}.section-heading h2{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}