@charset "UTF-8";
:root{--paper:#fff;--ink:#181a1e;--muted:#787e87;--line:#eceef0;--accent:#2563eb;--blue:#2563eb;--sans:Inter,-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.85;-webkit-font-smoothing:antialiased}a{color:var(--blue);text-decoration:none;transition:color .15s}a:hover{color:#1743a5}button,input{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:5px}img{max-width:100%;display:block}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:700;line-height:1.55}button{color:inherit}.wrap{width:min(1080px,calc(100% - 80px));margin:auto}
.site-header{height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{color:var(--ink);display:inline-flex;align-items:center;gap:10px;white-space:nowrap}.brand-name{font-size:21px;font-weight:750;letter-spacing:-.8px}.brand-period{color:var(--accent)}.brand-dot{display:none}.nav{display:flex;gap:30px;align-items:center}.nav a{font-size:12px;color:#686d76}.nav a:hover,.nav a[aria-current=page]{color:var(--ink)}
.hero{padding:76px 0 68px;max-width:850px}.intro-label{font-size:12px;color:#777f88;display:flex;gap:9px;align-items:center}.intro-label span{height:6px;width:6px;background:var(--accent);border-radius:50%}.hero h1{font-size:48px;line-height:1.5;letter-spacing:-1.9px;margin:20px 0}.hero-description{color:#737a84;font-size:14px;line-height:2}.hero-topics{display:flex;gap:10px;margin-top:28px}.hero-topics a{display:flex;gap:26px;align-items:center;background:#f5f6f8;color:#3f4650;border:1px solid #f0f1f3;border-radius:7px;padding:9px 16px;font-size:12px}.hero-topics a:hover{background:#edf2fc}.hero-topics span{color:#8d94a0}
.section{padding:44px 0 56px}.latest{border-top:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px;gap:20px}.section-heading h2{font-size:21px;letter-spacing:-.5px}.section-heading a{font-size:12px;color:#747b84}.section-heading a span{margin-left:10px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.card-image{overflow:hidden;aspect-ratio:16/9;background:#f5f6f8;border-radius:9px;margin-bottom:18px}.card-image img{width:100%;height:100%;object-fit:cover;transition:transform .2s}.card:hover img{transform:scale(1.025)}.category{display:inline-block;color:#526278;background:#f0f4f8;font-size:10px;border-radius:4px;padding:2px 8px;font-weight:500}.meta{display:flex;gap:12px;align-items:center;font-size:10px;color:#8c929b}.card h3{font-size:17px;line-height:1.8;margin:10px 0;color:var(--ink);letter-spacing:-.2px}.card p{font-size:12px;color:#818791;line-height:1.9}.read-time{font-size:10px;color:#9298a1;margin-top:13px;display:block}
.topic-section{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:6px 0 50px}.topic-section>a{display:flex;justify-content:space-between;align-items:center;padding:25px 28px;border:1px solid var(--line);border-radius:9px;color:var(--ink)}.topic-section>a:hover{background:#fafbfc}.topic-label{font-size:9px;letter-spacing:1.1px;color:#9097a1}.topic-section h2{font-size:19px;margin:6px 0}.topic-section p{color:#888f99;font-size:12px}.topic-arrow{color:#8c949f;font-size:21px}.about{padding:34px 0 52px;display:flex;gap:20px;border-top:1px solid var(--line);align-items:center}.avatar{width:42px;height:42px;border-radius:50%;background:#f1f3f6;color:#687381;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex-shrink:0}.about h2{font-size:14px;margin-bottom:7px}.about p{color:#858b94;font-size:12px;line-height:1.9}.site-footer{border-top:1px solid var(--line);padding:30px 0 24px}.footer-top{display:flex;align-items:center;gap:24px}.footer-top .brand-name{font-size:17px}.footer-top>span{font-size:11px;color:#9499a2}.footer-top>a:last-child{margin-left:auto;font-size:11px;color:#6f7782}.footer-bottom{display:flex;justify-content:space-between;gap:20px;font-size:9px;color:#9b9fa7;margin-top:25px}
.breadcrumb{font-size:10px;color:#979da6;display:flex;gap:12px;padding-top:25px}.breadcrumb a{color:#717985}.page-heading{padding:48px 0 35px}.page-heading h1{font-size:34px;letter-spacing:-1px;margin:0 0 12px}.page-heading p{font-size:13px;color:var(--muted)}.filter-bar{display:flex;justify-content:space-between;gap:24px;padding:17px 0;border-block:1px solid var(--line);align-items:center}.filters{display:flex;gap:7px;flex-wrap:wrap}.filters button{border:0;background:none;padding:8px 15px;border-radius:6px;font-size:12px;color:#787e89}.filters button.active{background:#202329;color:white}.search{position:relative;min-width:230px}.search input{border:1px solid #e9ebef;background:#fafbfc;border-radius:6px;padding:9px 34px 9px 12px;width:100%;font-size:12px;appearance:none}.search span{position:absolute;right:13px;top:8px;color:#959ca6}.results-meta{font-size:11px;color:#979da6;padding:24px 0}.archive-grid{row-gap:45px;padding-bottom:55px;min-height:350px}.empty{grid-column:1/-1;padding:40px 0;text-align:center;color:var(--muted)}.archive-bottom{border-top:1px solid var(--line);padding:25px 0 55px;text-align:center;color:#9a9fa8;font-size:11px}.paper-art{height:100%;background:#edf2f8;display:flex;flex-direction:column;justify-content:center;padding:25px;color:#56708e}.paper-art span{font-size:10px;letter-spacing:1px}.paper-art strong{font-size:24px;margin-top:10px}
.article-heading{max-width:760px;margin:48px auto 34px}.article-heading h1{font-size:35px;line-height:1.65;letter-spacing:-.9px;margin:17px 0}.dek{font-size:14px;color:#848b95;line-height:2}.byline{margin-top:22px;display:flex;gap:12px;align-items:center;font-size:11px;color:#959ba4}.byline .avatar{height:29px;width:29px;font-size:11px}.article-cover{max-width:880px;margin:0 auto 42px}.article-cover img{width:100%;aspect-ratio:16/9;object-fit:contain;border-radius:10px}.article-cover>.paper-art{height:320px;border-radius:10px}.article-cover figcaption{font-size:10px;color:#a0a5ad;margin-top:8px}.article-layout{display:grid;grid-template-columns:minmax(0,670px) 200px;gap:66px;max-width:936px;margin:auto}.article-body{font-size:15px;line-height:2.2}.article-body p{margin-bottom:25px}.sample-note{font-size:11px;color:#959ba4;border-left:2px solid #dce3ed;padding-left:15px;margin-bottom:27px}.takeaway{background:#f7f9fc;padding:24px 28px;margin:28px 0 42px;border:1px solid #edf0f5;border-radius:8px}.eyebrow{font-size:12px;font-weight:600;letter-spacing:0;color:#535e70}.takeaway .eyebrow{margin-bottom:10px}.takeaway ul{padding-left:20px;margin:0;font-size:14px}.article-body h2{font-size:24px;margin:43px 0 21px;padding-bottom:15px;border-bottom:1px solid var(--line);letter-spacing:-.5px}.article-body h3{font-size:17px;margin:28px 0 15px}.article-body blockquote{font-size:17px;padding:14px 21px;border-left:3px solid #c9d8f0;margin:30px 0;color:#697689;background:#fafbfd}.article-body table{width:100%;border-collapse:collapse;font-size:12px;margin:25px 0}.article-body th,.article-body td{text-align:left;border-bottom:1px solid var(--line);padding:14px 12px}.article-body th{background:#f6f7f9;font-weight:500}.toc{position:sticky;top:30px;height:fit-content;font-size:11px;border-left:1px solid var(--line);padding-left:21px}.toc-label{font-size:12px;font-weight:600;margin-bottom:18px}.toc a{display:block;margin:16px 0;line-height:1.9;color:#858e9b}.toc a:hover{color:var(--accent)}.toc small{display:none}.video-callout{border:1px solid var(--line);border-radius:8px;padding:23px;margin:35px 0;display:flex;gap:20px;align-items:center}.play-icon{background:#f4f6f9;border-radius:50%;width:42px;height:42px;flex-shrink:0;display:grid;place-items:center;color:#60738d}.video-callout p{font-size:13px;margin:0}.video-callout small{color:#9a9faa;font-size:10px}.article-end{border-top:1px solid var(--line);padding:25px 0;margin-top:42px;display:flex;justify-content:space-between;align-items:center;font-size:12px;gap:15px;flex-wrap:wrap}.copy-button{background:white;border:1px solid var(--line);padding:8px 14px;border-radius:6px;font-size:11px}.related{margin-top:40px;border-top:1px solid var(--line)}#copy-status:empty{display:none}.skip{position:absolute;left:20px;top:-70px;background:white;z-index:10;padding:10px}.skip:focus{top:10px}.text-link{display:inline-block;padding:10px 0;font-size:13px}
@media(max-width:850px){.wrap{width:calc(100% - 48px)}.nav{gap:20px}.hero{padding:58px 0}.hero h1{font-size:40px}.cards{gap:20px}.card h3{font-size:16px}.article-layout{grid-template-columns:1fr;gap:20px;max-width:670px}.toc{position:static;grid-row:1;padding:20px;border:1px solid var(--line);border-radius:8px}.toc a{margin:9px 0}.topic-section>a{padding:21px}.topic-section p{font-size:11px}.footer-top>span{display:none}}
@media(max-width:600px){.wrap{width:calc(100% - 40px)}.site-header{height:73px}.brand-name{font-size:19px}.nav{gap:14px}.nav a{font-size:10px}.nav a:first-child{display:none}.hero{padding:44px 0 42px}.intro-label{font-size:11px}.hero h1{font-size:31px;letter-spacing:-1.3px;line-height:1.65;margin:18px 0}.hero-description{font-size:12px;line-height:2.1}.hero-topics{margin-top:23px}.hero-topics a{padding:8px 14px;font-size:11px}.section{padding:30px 0 38px}.section-heading{margin-bottom:22px}.section-heading h2{font-size:19px}.section-heading a{font-size:10px}.cards{grid-template-columns:1fr;gap:30px}.card-image{margin-bottom:14px}.card h3{font-size:18px;margin:10px 0 7px}.card p{font-size:12px}.read-time{margin-top:9px}.topic-section{grid-template-columns:1fr;gap:12px;padding-bottom:34px}.topic-section>a{padding:20px 23px}.topic-section h2{font-size:18px}.about{align-items:flex-start;padding:27px 0 35px;gap:15px}.about h2{font-size:13px}.about p{font-size:11px}.about p br{display:none}.footer-bottom{flex-direction:column;gap:6px;margin-top:22px}.page-heading{padding:32px 0 26px}.page-heading h1{font-size:28px}.page-heading p{font-size:12px}.filter-bar{align-items:stretch;flex-direction:column;gap:15px;padding:15px 0}.filters{gap:5px}.filters button{padding:7px 12px;font-size:11px}.search{width:100%}.archive-grid{padding-bottom:35px}.article-heading{margin:30px auto}.article-heading h1{font-size:26px;letter-spacing:-.7px}.dek{font-size:13px}.article-cover{margin-bottom:25px}.article-body{font-size:14px}.article-body h2{font-size:21px}.article-body blockquote{font-size:15px}.takeaway{padding:22px}.takeaway ul{font-size:13px}.article-body table{font-size:11px}.article-body th,.article-body td{padding:10px 7px}.video-callout{padding:18px;gap:13px}.byline{font-size:10px;gap:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Sotogurashi identity and editorial layout */
:root{--ink:#172b35;--accent:#247681;--blue:#23658a}.site-header{height:96px}.brand{gap:10px}.brand-symbol{display:grid;place-items:center;width:38px;height:42px;color:#247681}.brand-symbol svg{width:35px;height:35px}.brand-name{font-size:25px;font-weight:750;letter-spacing:1.5px;line-height:1.4}.brand-english{display:block;font-size:8px;font-weight:500;letter-spacing:2.1px;color:#849299;margin-top:2px}.nav a{position:relative}.nav a[aria-current=page]:after{content:"";position:absolute;bottom:-12px;width:16px;height:2px;background:var(--accent);left:calc(50% - 8px)}
.hero-editorial{max-width:none;display:grid;grid-template-columns:1.14fr 1fr;gap:56px;align-items:center;padding:62px 0 49px}.hero-copy{min-width:0}.intro-label{font-size:10px;letter-spacing:.05em}.hero h1{font-size:40px;line-height:1.65;letter-spacing:-1.7px;margin:23px 0}.headline-emphasis{position:relative;white-space:nowrap;z-index:0}.headline-emphasis:after{content:"";position:absolute;bottom:3px;left:0;width:100%;height:9px;background:#d7eddf;z-index:-1}.hero-description{font-size:12px;line-height:2.1;color:#76858d}.hero-topics{align-items:center;gap:18px;margin-top:26px}.hero-topics a{color:white;background:#214e59;border:0;padding:11px 19px;gap:33px;border-radius:5px}.hero-topics a:hover{background:#173b44}.hero-topics a span{color:white}.hero-note{font-size:9px;color:#96a0a5}.hero-bottom{margin-top:35px;display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:.1em;color:#91a0a6}.tiny-arrow{font-size:18px;color:#75929c;padding-right:16px}
.featured-story{background:#f4f7f7;border-radius:12px;position:relative;overflow:hidden;border:1px solid #edf1f1}.featured-story>a{display:block;color:var(--ink)}.featured-image{aspect-ratio:16/9;position:relative;overflow:hidden}.featured-image img{width:100%;height:100%;object-fit:cover;transition:transform .25s}.featured-story:hover img{transform:scale(1.025)}.featured-label{position:absolute;top:15px;left:15px;background:white;padding:6px 12px;border-radius:4px;font-size:9px;letter-spacing:.09em;color:#31555e;display:flex;gap:28px;align-items:center}.featured-content{padding:22px 25px 18px}.featured-content h2{font-size:19px;line-height:1.8;letter-spacing:-.4px;margin:11px 0 8px}.featured-content p{font-size:11px;color:#809095}.featured-read{display:flex;justify-content:space-between;margin-top:17px;padding-top:12px;border-top:1px solid #dfe7e7;color:#4d777f;font-size:10px}.featured-read>span{font-size:17px;line-height:1}.category{background:#eaf3f2;color:#427578}.topic-rail{display:flex;align-items:center;border-block:1px solid var(--line);padding:18px 0;gap:29px}.topic-rail>span{font-size:10px;color:#8c989f;margin-right:auto}.topic-rail a{display:flex;gap:9px;align-items:center;color:#4c606b;font-size:11px}.topic-rail a>span:last-child{font-size:9px;color:#9ba7ad;margin-left:10px}.topic-dot{width:7px;height:7px;display:inline-block;border-radius:50%}.life-dot{background:#55958f}.english-dot{background:#a19bc4}.latest{border-top:0}.section-heading h2{display:flex;align-items:center;gap:10px;font-size:20px}.section-dot{height:7px;width:7px;border-radius:2px;background:var(--accent)}.cards{gap:25px}.card-image{border-radius:8px}.card[data-topic="英語学習"] .category{background:#f0eef7;color:#7d719a}.card h3{color:#213640}.card a:hover h3{color:var(--accent)}.topic-section>a:first-child{background:#f5f9f8;border-color:#eaf1ef}.topic-section>a:last-child{background:#f8f7fa;border-color:#eeedf2}.topic-section>a{position:relative;overflow:hidden;border-radius:8px}.topic-section h2{font-size:20px}.topic-label{font-size:8px;letter-spacing:1.5px}.topic-arrow{border:1px solid #d8e3e1;border-radius:50%;width:34px;height:34px;display:grid;place-items:center;font-size:17px}.about .avatar{background:#edf4f2;color:#43817c;border-radius:12px;width:49px;height:49px;font-size:24px}.footer-top .brand-name{font-size:20px}.footer-top .brand-english{font-size:7px}.footer-top .brand-symbol{width:28px}.footer-top .brand-symbol svg{width:28px}.page-heading{position:relative}.page-heading:before{content:"";display:block;width:24px;height:3px;background:#55958f;margin-bottom:17px}.filters button.active{background:#214e59}.article-heading h1{color:#203640}.article-body h2{border-left:3px solid #7ea6a3;padding-left:15px;border-bottom:0}.takeaway{background:#f4f8f7;border-color:#e6eeeb}.toc{border-left-color:#dbe6e3}.toc-label{color:#3b6468}.paper-art{background:#edf3f1;color:#527772}
@media(min-width:1200px){.hero h1{font-size:43px}.hero-editorial{gap:75px}}@media(max-width:850px){.hero-editorial{gap:26px;padding:44px 0 35px}.hero h1{font-size:31px;letter-spacing:-1.5px}.hero-description{font-size:11px}.hero-note{display:none}.featured-content{padding:17px}.featured-content h2{font-size:16px}.featured-content p{font-size:10px}.hero-bottom{margin-top:25px}.intro-label{font-size:9px}.brand-name{font-size:23px}}@media(max-width:600px){.site-header{height:83px}.brand-symbol{width:29px;height:33px}.brand-symbol svg{width:29px;height:29px}.brand-name{font-size:22px;letter-spacing:1px}.brand-english{font-size:7px;letter-spacing:1.5px}.nav{gap:13px}.nav a{font-size:10px}.hero-editorial{grid-template-columns:1fr;gap:31px;padding:32px 0}.hero h1{font-size:33px;margin:20px 0 16px;letter-spacing:-1.3px}.hero-description{font-size:12px}.hero-bottom{display:none}.hero-note{display:block;font-size:9px}.hero-topics{margin-top:23px}.featured-content{padding:18px 20px}.featured-content h2{font-size:18px}.featured-label{top:12px;left:12px}.featured-content p{font-size:11px}.topic-rail{gap:18px;flex-wrap:wrap;padding:15px 0}.topic-rail>span{width:100%;font-size:9px}.topic-rail a{font-size:11px}.topic-rail a>span:last-child{margin-left:4px}.section-heading h2{font-size:19px}.about .avatar{width:43px;height:43px;font-size:21px}.footer-top{gap:12px}.footer-top .brand-name{font-size:18px}.article-heading h1{font-size:26px}}
/* Subtle finishing details */
.hero-editorial{position:relative}.hero-copy{position:relative}.hero-copy:before{content:"";display:block;width:36px;height:3px;background:linear-gradient(90deg,#387e83 0 62%,#c3ded1 62%);border-radius:2px;margin-bottom:22px}.intro-label{letter-spacing:.08em}.hero h1{letter-spacing:-1.2px}.headline-emphasis:after{height:10px;bottom:2px;border-radius:2px;transform:rotate(-1deg)}.hero-bottom{padding-top:18px;border-top:1px solid #edf1ef;max-width:300px}.hero-topics a{box-shadow:0 3px 0 #153b4520;transition:background .2s,transform .2s}.hero-topics a:hover{transform:translateY(-2px)}.featured-story{box-shadow:0 9px 28px #18394308;transform:rotate(.6deg);transition:transform .25s,box-shadow .25s}.featured-story:hover{transform:rotate(0deg) translateY(-3px);box-shadow:0 14px 32px #18394312}.featured-label{font-weight:600;border:1px solid #ffffffa6;box-shadow:0 2px 8px #102f3610}.featured-content{background:linear-gradient(125deg,#f7faf9,#f0f6f5)}.featured-read>span{width:24px;height:24px;border:1px solid #d7e4e1;display:grid;place-items:center;border-radius:50%;font-size:13px}.featured-read{align-items:center}.topic-rail{background:#fafcfb;border:1px solid #edf2ef;border-radius:8px;padding:17px 20px}.topic-rail a{transition:color .2s}.topic-rail a:hover{color:#225b61}.topic-rail a>span:last-child{font-variant-numeric:tabular-nums;border:1px solid #e1e9e6;border-radius:4px;padding:0 5px;color:#809b95}.section-heading h2{gap:12px}.section-dot{position:relative;width:6px;height:13px;border-radius:2px;background:#497e81}.section-heading a{border-bottom:1px solid #dde6e4;padding-bottom:3px}.card{padding:10px 10px 15px;margin:-10px -10px -15px;border:1px solid transparent;border-radius:12px;transition:background .2s,border-color .2s,transform .2s}.card:hover{background:#fbfdfc;border-color:#e5ede9;transform:translateY(-3px)}.card-image{border:1px solid #153e4008}.category{position:relative;padding-left:17px;border-radius:4px}.category:before{content:"";position:absolute;left:7px;top:calc(50% - 2px);width:4px;height:4px;border-radius:50%;background:#679c94}.card[data-topic="英語学習"] .category:before{background:#9b8bb8}.read-time{display:flex;align-items:center;gap:8px}.read-time:before{content:"";display:inline-block;width:8px;height:8px;border:1px solid #a7b6b9;border-radius:50%;background:linear-gradient(90deg,transparent 45%,#a7b6b9 45% 55%,transparent 55%) center top/100% 50% no-repeat}.topic-section>a{transition:transform .2s,border-color .2s}.topic-section>a:hover{transform:translateY(-2px);border-color:#b8ceca}.topic-section>a:after{content:"";position:absolute;right:59px;bottom:-22px;width:88px;height:88px;border:1px solid #dfeae5;border-radius:50%;pointer-events:none}.topic-section>a:last-child:after{border-color:#e8e2ef;border-radius:14px;transform:rotate(30deg)}.topic-section .topic-arrow{z-index:1;background:#ffffffb0}.about{position:relative}.about .avatar{border:1px solid #dfeae5;box-shadow:4px 4px 0 #f4f7f5}.page-heading h1{letter-spacing:-.6px}.page-heading:before{border-radius:3px;width:34px;background:linear-gradient(90deg,#387e83 0 65%,#c3ded1 65%)}.article-cover{padding:8px;border:1px solid #e8eeeb;border-radius:14px}.article-cover figcaption{padding:0 5px}.takeaway{position:relative;border-left:3px solid #6a9790}.article-body blockquote{background:#f7faf9;border-left-color:#b1d0c6;border-radius:0 6px 6px 0}.site-footer{border-top:2px solid #eaf0ed}.footer-top .brand-symbol{color:#628e8e}
@media(max-width:600px){.hero-copy:before{margin-bottom:17px;width:30px}.hero-editorial{gap:29px}.featured-story{transform:none}.featured-story:hover{transform:none}.topic-rail{padding:15px 17px;gap:12px 22px}.card{margin:0;padding:0;border:0;border-radius:0}.card:hover{background:transparent;transform:none}.topic-section>a:after{width:76px;height:76px;right:70px}.article-cover{padding:5px;border-radius:10px}}