:root{--ink:#142953;--sub:#4d6081;--line:#dce4ef;--blue:#2466ce}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;color:var(--ink);background:#edf2f7;font-family:'Hiragino Kaku Gothic ProN','Hiragino Sans','Noto Sans JP',Meiryo,sans-serif;font-size:14px;line-height:1.8;-webkit-font-smoothing:antialiased}.wrap{width:100%;max-width:560px;margin:auto;min-height:100vh;background:#fbfdff;border-inline:1px solid #e3eaf2}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}header{display:flex;align-items:center;justify-content:space-between;padding:25px 24px;gap:12px}.brand{font-size:19px;font-weight:800;display:inline-flex;align-items:center;gap:10px;letter-spacing:.015em}.nav{font-size:11px;font-weight:700;white-space:nowrap}.mark{width:25px;height:26px;position:relative;display:inline-block}.mark:before{content:'';position:absolute;left:6px;top:10px;width:16px;height:1px;background:var(--ink);transform:rotate(-35deg)}.mark i{position:absolute;width:10px;height:10px;border-radius:50%;background:#fa767a;top:10px;left:0}.mark i:nth-child(2){background:#4285f4;top:0;left:15px}.mark i:nth-child(3){background:#7ad3c7;top:19px;left:16px}.hero{padding:24px 25px 30px}.intro{font-size:11px;color:var(--sub);margin-bottom:18px;line-height:1.7}h1{font-size:31px;line-height:1.55;letter-spacing:-.035em;font-weight:800}.lead{font-size:14px;margin-top:15px;line-height:1.9}.hero-bottom{display:flex;align-items:center;gap:13px;margin-top:14px}.primary{background:#e7646d;color:white;display:inline-flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;border-radius:26px;font-size:13px;font-weight:700;flex-shrink:0}.primary:hover{background:#ca4b56}.thought{width:210px;height:108px;min-width:0;flex:1}.try{margin:0 24px 34px;padding:22px 20px 14px;border:1.5px solid #233969;border-radius:16px;background:white;scroll-margin-top:20px}.try-heading{display:flex;gap:12px;align-items:center}.step{width:36px;height:36px;border-radius:50%;background:#173966;color:white;display:grid;place-items:center;font:700 16px ui-monospace,monospace;flex-shrink:0}.eyebrow{font-size:10px;color:var(--sub)}h2{font-size:17px;line-height:1.6;font-weight:750}.try-desc{font-size:12px;color:var(--sub);margin:14px 0}.flow{display:flex;list-style:none;margin:0 0 18px;padding:0;gap:8px}.flow li{font-size:11px;background:#f1f5fa;border-radius:5px;padding:5px 9px}.flow li+li:before{content:'→';margin-right:8px;color:var(--sub)}.lesson-link{border:1px solid #d5e0ef;border-radius:8px;padding:13px 15px;display:flex;align-items:center;justify-content:space-between;background:#fff9df;gap:10px}.lesson-link>span{display:flex;flex-direction:column}.lesson-link small{font-size:10px;color:var(--sub)}.lesson-link strong{font-size:16px;margin:2px 0}.lesson-link span span{font-size:11px;color:var(--sub)}.lesson-link b{font-size:20px;color:var(--blue)}.lesson-link:hover{border-color:var(--blue)}.note{font-size:10px;color:var(--sub);margin-top:10px;text-align:right}.courses{padding:0 17px}.section-heading{display:flex;align-items:baseline;gap:12px;padding:0 7px}.section-heading h2{font-size:19px}.section-heading>span{font-size:10px;color:var(--sub)}.course-guide{font-size:11px;color:var(--sub);padding:7px 7px 14px}.course{padding:16px;border-radius:12px;margin-bottom:12px;background:#fff8d8}.c1{background:#e8f1fc}.c2{background:#e6f8fc}.c3{background:#f0f0f2}.course-label{display:flex;gap:12px;align-items:center;margin-bottom:13px}.badge{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;font:bold 20px Arial,sans-serif;color:#171717;background:#f7df1e}.c1 .badge{background:#3178c6;color:white}.c2 .badge{background:#61dafb}.c3 .badge{background:#171717;color:white}h3{font-family:Arial,sans-serif;font-size:21px;line-height:1.3}.course-label p{font-size:11px;color:var(--sub);margin-top:4px}.course-paths{display:grid;grid-template-columns:1fr 1fr;gap:9px}.course-paths a{display:flex;align-items:center;gap:9px;padding:10px;background:#ffffffeb;border:1px solid #cedbed;border-radius:8px}.course-paths a:hover{border-color:var(--blue);background:white}.path-icon{font-size:25px;color:var(--blue);line-height:1}.course-paths a>span:nth-child(2){display:flex;flex-direction:column;flex:1}.course-paths strong{font:700 14px/1.5 Arial,sans-serif}.course-paths span span{font-size:10px}.course-paths small{font-size:9px;color:var(--sub);margin-top:3px}.arrow{color:var(--blue)}.start-guide{margin:28px 25px;padding:18px 0;border-top:1px dashed #c9d6e7}.start-guide h2{font-size:15px}.start-guide p{font-size:12px;color:var(--sub);margin:8px 0 12px}.start-guide a{font-size:11px;font-weight:700;color:var(--blue)}footer{margin:0 24px;padding:26px 0;border-top:2px dotted #d4e2f4;text-align:center}footer .closing{font-size:15px;font-weight:700;margin-bottom:20px}footer .brand{font-size:16px}footer p:not(.closing){font-size:10px;color:var(--sub);margin-top:8px}.footer-links{display:flex;justify-content:center;gap:20px;font-size:11px;margin:18px 0}footer small{font-size:9px;color:var(--sub)}a:focus-visible{outline:3px solid #2466ce;outline-offset:4px}@media(max-width:380px){header{padding:20px 18px}.brand{font-size:17px}.hero{padding:20px 19px 26px}h1{font-size:27px}.primary{font-size:11px;padding:11px 12px}.thought{height:94px}.try{margin-inline:17px;padding:17px 14px}.try h2{font-size:15px}.section-heading{display:block}.course-paths a{gap:6px;padding:9px 7px}.path-icon{font-size:20px}.course-label p{font-size:10px}.course{padding:14px}.note{font-size:9px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* A single descriptive heading replaces repeated slogans. */
.hero h1.site-description{font-size:18px;line-height:1.8;letter-spacing:0;font-weight:500;text-wrap:pretty}


.hero-bottom .start-guide{margin:0;padding:0;border:0;flex:1;min-width:0}
.hero-bottom .start-guide p{margin:8px 0 0}
.hero-bottom .thought{flex:0 1 160px}
@media(max-width:420px){.hero-bottom{flex-wrap:wrap}.hero-bottom .start-guide{flex-basis:100%}.hero-bottom .thought{margin-left:auto}}

.site-tagline{font-size:18px;font-weight:700;line-height:1.8;margin-bottom:12px;color:var(--ink)}
.hero .site-tagline + h1.site-description{font-size:14px;font-weight:400;line-height:1.9;color:var(--sub)}

/* Supplied brand artwork; text alongside provides the accessible site name. */
.site-logo{display:block;width:48px;height:48px;object-fit:contain;flex:0 0 48px}

/* Allow the longer site name to wrap naturally on narrow screens. */
header{flex-wrap:wrap}header .brand{min-width:0;max-width:100%;font-size:16px;line-height:1.5}header .nav{margin-left:auto}footer .brand{max-width:100%;font-size:15px;line-height:1.6;text-align:left}

/* Release notes sit above the course list without competing with it. */
.announcements{margin:0 24px 26px;padding:15px 16px;background:#f1f4f8;border:1px solid var(--line);border-radius:8px}
.announcements h2{font-size:14px;color:var(--ink);line-height:1.6;margin-bottom:6px}
.announcements-empty,.announcement-list{font-size:12px;color:#344764;line-height:1.8}
.announcement-list{list-style:none;margin:0;padding:0}
.announcement-list li{padding:10px 0;border-top:1px solid var(--line);overflow-wrap:anywhere}
.announcement-list li:first-child{border-top:0;padding-top:0}
.announcement-list li:last-child{padding-bottom:0}
.announcement-list time{display:block;font-size:11px;color:var(--sub);font-variant-numeric:tabular-nums}
.announcement-list a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
@media(max-width:380px){.announcements{margin-inline:17px;padding:13px 14px}}

/* Policy page uses the site shell while keeping the text easy to scan. */
.privacy-main{padding:22px 25px 34px}
.privacy-main h1{font-size:25px;line-height:1.5;letter-spacing:-.02em}
.privacy-main>p{font-size:13px;color:var(--sub);margin-top:14px}
.privacy-main section{padding:20px 0;border-top:1px solid var(--line);margin-top:20px}
.privacy-main section h2{font-size:16px}
.privacy-main section p{font-size:13px;color:#344764;margin-top:8px}
.privacy-main section a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.privacy-updated{font-size:11px!important}