:root{--ink:#242426;--muted:#62666b;--paper:#fbfaf6;--white:#fff;--line:#d9d5cc;--wine:#8f1738;--blue:#176b87;--teal:#25756f;--gold:#a46212;--purple:#6552a3;--font:Inter,"Noto Sans","Noto Sans JP",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}html{color-scheme:light}body{margin:0;color:var(--ink);background:var(--paper);font:1rem/1.5 var(--font)}a{color:inherit;text-underline-offset:.18em}a:focus-visible{outline:.2rem solid #0879b5;outline-offset:.18rem}.skip-link{position:fixed;left:-9999px;top:.6rem;z-index:10;padding:.55rem .75rem;background:#fff}.skip-link:focus{left:.6rem}
.site-header{display:flex;justify-content:space-between;gap:1rem;padding:.72rem clamp(.8rem,4vw,3.5rem);border-bottom:1px solid var(--line)}.site-header nav{display:flex;gap:1rem}.brand,.site-header nav a{font-size:.84rem;font-weight:750;text-decoration:none}.reference-link{color:var(--wine)}
.hero{padding:1.85rem clamp(1rem,5vw,4.5rem) 1.55rem;border-bottom:1px solid var(--line)}.eyebrow{margin:0;color:var(--wine);font-size:.7rem;font-weight:850;letter-spacing:.11em;text-transform:uppercase}h1,h2{line-height:1.15;text-wrap:balance}h1{margin:.35rem 0 .6rem;font-size:clamp(1.75rem,3.5vw,2.75rem);letter-spacing:-.035em}.lead{max-width:72ch;margin:0;color:var(--muted);font-size:clamp(.94rem,1.5vw,1.06rem)}
.chapter-section{padding:1.2rem clamp(.75rem,3vw,2.5rem) 2.5rem}.week-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.65rem}.week-card{display:flex;flex-direction:column;min-width:0;min-height:9.1rem;padding:.8rem .85rem;background:var(--white);border:1px solid var(--line);border-left:.28rem solid var(--blue);border-radius:.45rem;text-decoration:none;transition:transform 120ms ease,box-shadow 120ms ease}.week-card:hover{transform:translateY(-.12rem);box-shadow:0 .45rem 1.15rem rgb(35 35 38/10%)}.week-card.classification{border-left-color:var(--wine)}.week-card.network{border-left-color:var(--teal)}.week-card.vision{border-left-color:var(--gold)}.week-card.sequence{border-left-color:var(--purple)}.week-card.transformer{border-left-color:#375f92}.week-card.pbl{border-left-color:#7a5b16;background:#fffdf5}.week-card.presentation{border-left-color:var(--wine);background:#fff8fa}.week-top{display:flex;justify-content:space-between;gap:.5rem;color:var(--muted);font-size:.63rem;font-weight:820;text-transform:uppercase;letter-spacing:.055em}.week-card h2{margin:.55rem 0 .35rem;font-size:clamp(1rem,1.35vw,1.18rem);letter-spacing:-.015em}.week-card p{margin:auto 0 0;color:#4f5256;font-size:.82rem;line-height:1.35}footer{padding:1.25rem clamp(1rem,4vw,3.5rem);color:#d4d2ce;background:#29292c;font-size:.78rem}footer p{margin:0}
@media(max-width:1100px){.week-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:760px){.week-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding-top:1.4rem}}@media(max-width:520px){.site-header{align-items:flex-start}.site-header nav{display:grid;gap:.25rem;text-align:right}.week-grid{grid-template-columns:1fr}.week-card{min-height:7.5rem}}@media(prefers-reduced-motion:reduce){.week-card{transition:none}}