/* ==========================================================
   第3版のヘッダーとメニューを、site.css で組んだ古いページに載せるための CSS（2026-09-16）
   中身は assets/p.css のヘッダー・メガメニュー・ドロワーと同じ見た目。
   古いページの .btn や .wrap とぶつからないよう、すべて .hd／.drawer の下に閉じてある。
   HTML は ForClaude の .claude/renewal-build/propagate-kata/build.py の apply_shell() が差し込む。
   ========================================================== */

:root{--sh-head:88px;--sh-ink:#0b1220;--sh-ink2:#334155;--sh-muted:#526074;--sh-line:#e6ebf2;--sh-accent:#0d62ab;--sh-soft:#eaf3fd}
@media(max-width:1000px){:root{--sh-head:64px}}
html{scroll-padding-top:calc(var(--sh-head) + 8px)}

.hd{position:sticky;top:0;z-index:150;height:var(--sh-head);background:#fff;border-bottom:1px solid var(--sh-line);font-family:"Noto Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic Medium","Yu Gothic",Meiryo,system-ui,sans-serif;line-height:1.8;color:var(--sh-ink)}
.hd *,.drawer *{box-sizing:border-box}
.hd a,.drawer a{text-decoration:none;color:inherit}
.hd a:hover,.drawer a:hover{text-decoration:none}
.hd ul{list-style:none;padding:0;margin-top:0;margin-bottom:0}
.hd p{margin-top:0;margin-bottom:0}
.hd button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
.hd .wrap{width:min(1352px,calc(100% - 88px));margin-inline:auto;max-width:none;padding:0}
@media(max-width:700px){.hd .wrap{width:calc(100% - 40px)}}
.hd>.wrap{height:100%;display:flex;align-items:center;gap:28px}
.hd-logo{display:flex;align-items:center}
.hd-logo img{height:24px;width:auto;display:block}
.hd .hd-nav{display:flex;align-items:center;gap:30px;margin-left:auto;font-size:.84rem;font-weight:800;height:100%}
.hd-nav>li{height:100%;display:flex;align-items:center;position:relative}
.hd-nav>li>a,.hd-nav>li>button{display:flex;align-items:center;gap:6px;height:100%;font-weight:800;font-size:.84rem;transition:color .15s;white-space:nowrap}
.hd-nav>li>a:hover,.hd-nav>li>button:hover{color:var(--sh-accent)}
.hd-nav .caret{width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-2px) rotate(45deg);opacity:.55}

.hd .btn,.drawer .btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;width:auto;min-height:44px;padding:0 20px;border-radius:999px;border:0;font-weight:800;font-size:.8rem;line-height:1.3;text-align:center;white-space:nowrap;transition:transform .15s,background-color .15s,color .15s}
.hd .btn:hover,.drawer .btn:hover{transform:translateY(-1px)}
.hd .btn-main,.drawer .btn-main{background:linear-gradient(100deg,#1667b5 0%,#0f5ca3 45%,#0a3f73 100%);color:#fff;box-shadow:0 6px 18px rgba(18,114,196,.28)}
.hd .btn-lineapp,.drawer .btn-lineapp{background:#00853a;color:#fff;box-shadow:0 6px 18px rgba(0,133,58,.25)}
.hd .btn-lineapp:hover,.drawer .btn-lineapp:hover{background:#006e30;color:#fff}
.hd .btn-main:hover,.drawer .btn-main:hover{color:#fff}
.hd .btn-line,.drawer .btn-line{border:1px solid rgba(18,114,196,.45);color:var(--sh-accent);background:#fff}
.hd .btn svg,.drawer .btn svg{flex:none;display:block}
.drawer .btn-lg{min-height:56px;padding:0 22px;font-size:.92rem}
.hd .arw,.drawer .arw{display:inline-block;width:14px;height:10px;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 10'%3E%3Cpath d='M0 5h12M8 1l4 4-4 4' fill='none' stroke='%23000' stroke-width='1.8'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 10'%3E%3Cpath d='M0 5h12M8 1l4 4-4 4' fill='none' stroke='%23000' stroke-width='1.8'/%3E%3C/svg%3E") center/contain no-repeat}
.hd-btns{display:flex;gap:10px}
@media(max-width:1180px){.hd .hd-nav{gap:20px}.hd-btns .btn{padding:0 14px}}

.mega{position:fixed;left:0;right:0;top:var(--sh-head);background:#fff;border-top:1px solid var(--sh-line);box-shadow:0 30px 40px -24px rgba(11,18,32,.18);opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .18s,transform .18s,visibility .18s;cursor:default}
.hd-nav>li:hover .mega,.hd-nav>li:focus-within .mega,.hd-nav>li.open .mega{opacity:1;visibility:visible;transform:none}
.mega-in{display:grid;grid-template-columns:260px 1fr;gap:40px;padding:36px 0 40px}
.mega-ttl .en{display:block;font-family:"Sora","Manrope",system-ui,sans-serif;font-size:2rem;font-weight:800;line-height:1.1;letter-spacing:0}
.mega-ttl small{display:block;color:var(--sh-accent);font-size:.78rem;font-weight:800;margin-bottom:6px}
.hd .mega-ttl p{margin-top:12px;font-size:.8rem;color:var(--sh-muted);font-weight:500;line-height:1.8}
.mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.mega-grid a{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--sh-line);border-radius:9px;transition:border-color .15s,background-color .15s}
.mega-grid a:hover{border-color:rgba(18,114,196,.4);background:var(--sh-soft)}
.mega-grid b{display:block;font-size:.9rem;line-height:1.5}
.mega-grid small{display:block;font-size:.72rem;color:var(--sh-muted);font-weight:500;line-height:1.6}
.hd .mega-cat{grid-column:1/-1;font-size:.72rem;color:var(--sh-accent);font-weight:800;margin-top:6px}
.hd .mega-cat:first-child{margin-top:0}
.hd .circ{flex:none;display:grid;place-items:center;width:28px;height:28px;margin-left:auto;border-radius:50%;border:1px solid rgba(18,114,196,.35);color:var(--sh-accent);transition:background-color .15s,color .15s}
.hd a:hover .circ{background:var(--sh-accent);color:#fff}
.hd .circ svg{display:block}

.hd-menu{display:none;margin-left:auto;width:44px;height:44px;position:relative}
.hd-menu i,.hd-menu i::before,.hd-menu i::after{position:absolute;left:11px;width:22px;height:2px;background:var(--sh-ink);border-radius:2px;transition:transform .2s}
.hd-menu i{top:21px}
.hd-menu i::before{content:"";left:0;top:-7px}
.hd-menu i::after{content:"";left:0;top:7px}
.hd-menu[aria-expanded="true"] i{background:transparent}
.hd-menu[aria-expanded="true"] i::before{transform:translateY(7px) rotate(45deg)}
.hd-menu[aria-expanded="true"] i::after{transform:translateY(-7px) rotate(-45deg)}

.drawer{position:fixed;inset:var(--sh-head) 0 0 0;z-index:149;background:#fff;overflow-y:auto;padding:12px 20px 40px;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",Meiryo,system-ui,sans-serif;color:var(--sh-ink);line-height:1.6}
.drawer.open{opacity:1;visibility:visible}
.drawer h4{font-family:"Sora","Manrope",system-ui,sans-serif;font-size:.72rem;color:var(--sh-muted);letter-spacing:.06em;margin:24px 0 6px;font-weight:800}
.drawer>a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:13px 2px;border-bottom:1px solid var(--sh-line);font-weight:700;font-size:.95rem}
.drawer>a small{color:var(--sh-muted);font-weight:500;font-size:.72rem;text-align:right}
.drawer .btns{display:grid;gap:10px;margin-top:8px}
.drawer .btns a{width:100%}
.drawer .drawer-tel{justify-content:flex-start;gap:8px;margin-top:20px;border:0}
.drawer .drawer-tel small{margin-left:auto}

@media(max-width:1000px){
  .hd>.wrap{gap:12px}
  .hd-logo img{height:19px}
  .hd .hd-nav,.hd-btns{display:none}
  .hd-menu{display:block}
}