:root{--bg:#FAFAF8;--bg2:#F1F0EC;--ink:#1B2330;--ink2:#4A5260;--line:#D9D7D0;--navy:#1E2F4D;--navy-ink:#FFFFFF;--seal:#B7282E}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#141820;--bg2:#1C2129;--ink:#ECEBE6;--ink2:#AEB3BC;--line:#2E3540;--navy:#0F1A2E;--navy-ink:#ECEBE6;--seal:#D8474D}}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:"Noto Sans JP",system-ui,sans-serif;font-size:16px;line-height:1.9;letter-spacing:.02em;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}a{color:inherit}
h1,h2,h3{font-family:"Noto Serif JP","Hiragino Mincho ProN",serif;font-weight:700;line-height:1.4;letter-spacing:.04em}
.wrap{max-width:1040px;margin:0 auto;padding:0 24px}.narrow{max-width:680px;margin:0 auto}
header{position:sticky;top:0;z-index:10;background:var(--bg);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-family:"Noto Serif JP",serif;font-weight:700;font-size:1.25rem;text-decoration:none;letter-spacing:.06em}
.brand img{width:44px;height:44px;border-radius:50%;object-fit:cover}
.brand small{display:block;font-family:"Noto Sans JP",sans-serif;font-weight:400;font-size:.7rem;color:var(--ink2);letter-spacing:.1em;line-height:1}
nav ul{list-style:none;display:flex;gap:22px;font-size:.9rem;font-weight:500}
nav a{text-decoration:none;color:var(--ink2)}nav a:hover,nav a:focus-visible{color:var(--ink)}
nav a[aria-current]{color:var(--ink);border-bottom:2px solid var(--seal)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:6px 12px;font:inherit;color:var(--ink);cursor:pointer}
.nav-drop{position:relative}.nav-drop>a::after{content:" \25BE";font-size:.7em}
.nav-drop ul{display:none;position:absolute;top:100%;left:-12px;flex-direction:column;gap:0;background:var(--bg);border:1px solid var(--line);min-width:160px;padding:6px 0}
.nav-drop:hover ul,.nav-drop:focus-within ul{display:flex}.nav-drop ul a{display:block;padding:8px 16px}
.page-hero{background:var(--navy);color:var(--navy-ink);padding:72px 0 64px}
.page-hero .wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.page-hero .kicker{font-size:.85rem;letter-spacing:.14em;opacity:.8;margin-bottom:10px}
.page-hero h1{font-size:clamp(1.9rem,3.6vw,2.6rem)}
.page-hero .sub{margin-top:18px;font-family:"Noto Serif JP",serif;font-size:1.15rem;line-height:1.7;opacity:.95}
.page-hero img{width:100%;max-height:420px;object-fit:cover;border:1px solid rgba(255,255,255,.15)}
section{padding:80px 0}section.alt{background:var(--bg2)}
.body p{margin-bottom:1.6em}.body p:last-child{margin-bottom:0}
.body .note{font-size:.93rem;color:var(--ink2)}
.body .quote{border-left:3px solid var(--seal);padding:8px 0 8px 20px;font-family:"Noto Serif JP",serif;font-size:1.15rem;margin:2em 0}
.body figure{margin:2em 0}.body figcaption{font-size:.85rem;color:var(--ink2);margin-top:8px}
.body .placeholder{aspect-ratio:16/9;background:var(--bg2);border:1px dashed var(--line);display:grid;place-items:center;color:var(--ink2);font-size:.9rem}
.cta-band{background:var(--bg2);padding:64px 0;text-align:center}
.cta-band h2{font-size:1.5rem;margin-bottom:10px}
.cta-band p{color:var(--ink2);margin-bottom:26px}
.btn{display:inline-block;background:var(--seal);color:#fff;text-decoration:none;font-weight:700;padding:15px 34px;border-radius:2px;letter-spacing:.08em}
.btn:hover,.btn:focus-visible{filter:brightness(1.12)}
.courses{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}
.courses a{display:block;border:1px solid var(--line);padding:16px 18px;text-decoration:none;font-weight:500;background:var(--bg)}
.courses a:hover{border-color:var(--navy)}
.courses a[aria-current]{border-color:var(--seal);color:var(--seal)}
footer{background:var(--navy);color:var(--navy-ink);padding:64px 0 32px}
.ft{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}.ft .brand{color:var(--navy-ink)}
.ft address{font-style:normal;line-height:2;font-size:.95rem}.ft address a{text-decoration:none}
.ft .btn2{display:inline-block;margin-top:12px;border:1px solid rgba(255,255,255,.5);color:var(--navy-ink);text-decoration:none;padding:12px 28px;border-radius:2px;font-weight:500}
.copy{margin-top:48px;font-size:.78rem;opacity:.6;text-align:center}
@media (max-width:820px){.menu-btn{display:block}nav{display:none;position:absolute;left:0;right:0;top:68px;background:var(--bg);border-bottom:1px solid var(--line);padding:12px 24px 20px}nav.open{display:block}nav ul{flex-direction:column;gap:0}nav li a{display:block;padding:10px 0}.nav-drop ul{position:static;display:flex;border:0;padding:0 0 0 16px}.nav-drop>a::after{content:""}
.page-hero{padding:48px 0}.page-hero .wrap,.ft{grid-template-columns:1fr}.page-hero h1{font-size:1.7rem}section{padding:52px 0}.courses{grid-template-columns:1fr 1fr}}
:focus-visible{outline:2px solid var(--seal);outline-offset:3px}