:root{--background: oklch(99% .003 90);--foreground: oklch(18% .01 60);--card: oklch(100% 0 0);--muted: oklch(96% .003 90);--muted-foreground: oklch(52% .01 60);--border: oklch(91% .005 80);--primary: oklch(35% .1 155);--primary-foreground: oklch(98% 0 0);--accent: oklch(62% .12 70);--secondary: oklch(96% .005 90);--font-sans: "Noto Sans JP", ui-sans-serif, system-ui, sans-serif;--font-serif: "Noto Serif JP", serif;--font-display: "DM Serif Display", var(--font-serif)}*{box-sizing:border-box}html{font-family:var(--font-sans);background:var(--background);color:var(--foreground);line-height:1.7;-webkit-font-smoothing:antialiased}body{margin:0;font-size:15px}a{color:inherit}.container{max-width:1120px;margin:0 auto;padding:0 20px}.site-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:10px;padding-bottom:10px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none}.brand-mark{width:36px;height:36px;background:var(--primary);color:var(--primary-foreground);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:18px}.brand-name{font-weight:700;font-size:16px;line-height:1.2}.brand-sub{font-size:11px;color:var(--muted-foreground)}.header-count{font-size:12px;color:var(--muted-foreground);text-align:right}.header-count strong{font-size:22px;color:var(--foreground);font-family:var(--font-display);margin:0 3px}.hero{position:relative;border-bottom:1px solid var(--border);background-color:var(--muted);background-image:url(/assets/hero-bg-v2.webp);background-size:cover;background-position:center}.hero:before{content:"";position:absolute;inset:0;background:#fcfcf9d1}.hero .container{position:relative;padding-top:48px;padding-bottom:40px}.eyebrow{display:flex;align-items:center;gap:10px;color:var(--primary);font-size:12px;font-weight:600;letter-spacing:.12em}.eyebrow:before{content:"";width:28px;height:2px;background:var(--primary)}.hero h1{font-family:var(--font-serif);font-weight:700;font-size:clamp(24px,4vw,34px);line-height:1.4;margin:14px 0 12px}.hero h1 .accent{color:var(--primary)}.hero-lead{max-width:640px;color:var(--muted-foreground);font-size:14px;margin:0 0 24px}.hero-stats{display:flex;gap:40px}.hero-stats .num{font-family:var(--font-display);font-size:28px;color:var(--primary);line-height:1.2}.hero-stats .label{font-size:12px;color:var(--muted-foreground)}.toolbar{padding:24px 0 8px}.search-box{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--border);padding:10px 14px}.search-box svg{flex:none;color:var(--muted-foreground)}.search-box input{border:0;outline:0;width:100%;font:inherit;font-size:14px;background:transparent;color:inherit}.filter-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px}.filter-label{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--muted-foreground);margin-right:4px}.chip{font:inherit;font-size:12px;padding:5px 12px;background:var(--card);border:1px solid var(--border);cursor:pointer;color:var(--foreground)}.chip:hover{border-color:var(--primary)}.chip.active{background:var(--primary);border-color:var(--primary);color:var(--primary-foreground)}.select-wrap select{font:inherit;font-size:12px;padding:5px 8px;background:var(--card);border:1px solid var(--border);color:var(--foreground)}.sort-wrap{margin-left:auto}.result-note{font-size:12px;color:var(--muted-foreground);margin-top:14px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:16px 0 32px}@media(max-width:900px){.cards{grid-template-columns:repeat(2,1fr)}}@media(max-width:620px){.cards{grid-template-columns:1fr}}.case-card{background:var(--card);border:1px solid var(--border);padding:18px 18px 16px;display:flex;flex-direction:column;gap:10px;text-decoration:none;transition:border-color .15s,box-shadow .15s}.case-card:hover{border-color:var(--primary);box-shadow:0 2px 10px oklch(35% .1 155 / .08)}.card-top{display:flex;justify-content:space-between;align-items:center;font-size:11px}.badge{background:var(--secondary);color:var(--primary);font-weight:600;padding:3px 8px;font-size:11px}.year{color:var(--muted-foreground)}.card-company{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted-foreground)}.card-company .co{font-weight:600;color:var(--foreground)}.card-company .divider{color:var(--border)}.case-card h2,.case-card h3{font-family:var(--font-serif);font-size:16px;font-weight:700;line-height:1.5;margin:0}.card-summary{font-size:12.5px;color:var(--muted-foreground);margin:0;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}.card-learning{border-top:1px solid var(--border);padding-top:10px;font-size:12px}.card-learning .kl-label{font-family:var(--font-display);font-size:10.5px;letter-spacing:.14em;color:var(--accent);display:block;margin-bottom:4px}.card-learning p{margin:0;color:var(--muted-foreground);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}.tag{font-size:10.5px;color:var(--muted-foreground);background:var(--muted);padding:2px 8px}.pagination{display:flex;justify-content:center;align-items:center;gap:6px;padding-bottom:48px}.pagination button{font:inherit;font-size:13px;min-width:34px;padding:6px 10px;background:var(--card);border:1px solid var(--border);cursor:pointer;color:var(--foreground)}.pagination button.current{background:var(--primary);border-color:var(--primary);color:var(--primary-foreground)}.pagination button:disabled{opacity:.4;cursor:default}.detail-hero{background:var(--primary);color:var(--primary-foreground)}.detail-hero .container{padding-top:34px;padding-bottom:30px}.detail-hero .meta-row{display:flex;align-items:center;gap:10px;font-size:12px}.detail-hero .badge{background:#ffffff26;color:var(--primary-foreground)}.detail-hero h1{font-family:var(--font-serif);font-size:clamp(20px,3vw,28px);line-height:1.5;margin:14px 0 10px}.detail-hero .company-row{font-size:13px;opacity:.9;display:flex;gap:10px;align-items:center}.detail-hero .company-row .co{font-weight:600}.breadcrumb{font-size:12px;color:var(--muted-foreground);padding:14px 0 0}.breadcrumb a{color:var(--muted-foreground);text-decoration:none}.breadcrumb a:hover{color:var(--primary)}.detail-body{padding:30px 0 40px;display:grid;grid-template-columns:1fr 280px;gap:32px}@media(max-width:820px){.detail-body{grid-template-columns:1fr}}.section{margin-bottom:26px}.section-title{display:flex;align-items:center;gap:8px;font-family:var(--font-serif);font-size:15px;font-weight:700;margin:0 0 10px}.section-title .icon{width:26px;height:26px;flex:none;display:flex;align-items:center;justify-content:center;background:var(--secondary);color:var(--primary)}.section p{margin:0;font-size:14px}.summary-block{background:var(--card);border:1px solid var(--border);border-left:3px solid var(--primary);padding:16px 18px;font-size:14px}.learning-block{background:#fef3e7;border:1px solid oklch(88% .06 70);padding:16px 18px}.learning-block .kl-label{font-family:var(--font-display);letter-spacing:.14em;font-size:12px;color:var(--accent);display:block;margin-bottom:6px}.learning-block p{margin:0;font-size:14px}.side-panel{font-size:13px}.side-box{background:var(--card);border:1px solid var(--border);padding:16px 18px;margin-bottom:16px}.side-box h2{font-size:12px;font-weight:600;color:var(--muted-foreground);margin:0 0 10px;letter-spacing:.08em}.side-box .row{display:flex;justify-content:space-between;gap:10px;padding:5px 0;border-bottom:1px dashed var(--border)}.side-box .row:last-child{border-bottom:0}.side-box .row .k{color:var(--muted-foreground);flex:none}.side-box .row .v{text-align:right}.side-box .tags{display:flex;flex-wrap:wrap;gap:6px}.out-link{display:block;border:1px solid var(--border);padding:9px 12px;text-decoration:none;font-size:12.5px;margin-top:8px;color:var(--primary);word-break:break-all}.out-link:hover{border-color:var(--primary)}.related{padding-bottom:48px}.related h2{font-family:var(--font-serif);font-size:18px;border-top:1px solid var(--border);padding-top:28px;margin:0 0 16px}.back-link{display:inline-block;margin-top:6px;font-size:13px;color:var(--primary)}.prose{max-width:760px;padding:36px 0 56px}.prose h1{font-family:var(--font-serif);font-size:24px}.prose 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