/* Derived from the live homepage; scoped to preserve the photo form. */
.yt-site-header{--ink:#173f3c;--dark:#112f2c;--text:#273b37;--muted:#65706a;--paper:#f7f6f2;--line:#dce1da;--accent:#bd451f;--soft:#eaf0e9;--font:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-family:var(--font);font-size:16px;line-height:1.85;letter-spacing:normal;color:var(--text);-webkit-font-smoothing:antialiased}
.yt-site-header *{box-sizing:border-box}.yt-site-header a{color:inherit;text-decoration:none;touch-action:manipulation}.yt-site-header summary{touch-action:manipulation}.yt-site-header :is(a,summary):focus-visible{outline:3px solid #e5823e;outline-offset:5px}
.yt-shell{width:min(1240px,calc(100% - 96px));margin-inline:auto}
.yt-button{display:inline-flex;align-items:center;justify-content:center;gap:32px;padding:19px 27px;background:var(--accent);color:white;font-size:15px;font-weight:800;border:1px solid transparent;border-radius:7px;min-height:58px;line-height:1.4;transition:background .18s,transform .18s}
.yt-button:hover{background:#a23717;transform:translateY(-2px)}
.yt-button>span{font-size:23px;font-weight:400}
.yt-button-small{font-size:13px;min-height:46px;padding:12px 20px;gap:22px}
.yt-site-header{background:rgba(247,246,242,.97);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.yt-header-inner{min-height:90px;display:flex;align-items:center;gap:30px;justify-content:space-between}
.yt-brand{display:inline-flex;flex-direction:column;line-height:1.15;flex-shrink:0}
.yt-brand-name{font-family:Arial,sans-serif;font-size:30px;font-weight:900;letter-spacing:-1.5px;color:var(--ink)}
.yt-brand-dot{color:var(--accent)}
.yt-brand-tag{font-size:10px;letter-spacing:.04em;margin-top:6px;font-weight:700;color:var(--muted)}
.yt-desktop-nav{display:flex;gap:26px;margin-left:auto;align-items:center}
.yt-desktop-nav a{font-size:12px;font-weight:700;padding:12px 0}
.yt-desktop-nav a:hover{color:var(--accent)}
.yt-header-actions{display:flex;align-items:center;gap:16px}
.yt-mobile-menu{display:none}
.yt-sr-only{position:absolute;clip:rect(0,0,0,0);width:1px;height:1px;overflow:hidden;white-space:nowrap}
@media(max-width:1150px){.yt-shell{width:calc(100% - 64px)}
.yt-desktop-nav{gap:17px}
.yt-desktop-nav a{font-size:11px}
.yt-header-inner{gap:22px}}
@media(max-width:920px){.yt-desktop-nav{display:none}
.yt-mobile-menu{display:block}
.yt-mobile-menu summary{display:flex;flex-direction:column;justify-content:center;gap:7px;width:42px;height:44px;padding:8px}
.yt-mobile-menu summary>span:not(.yt-sr-only){height:2px;background:var(--ink);width:24px}
.yt-mobile-menu nav{position:absolute;left:0;right:0;top:100%;background:var(--paper);padding:15px 32px 25px;box-shadow:0 12px 17px #182c2420;display:grid;grid-template-columns:1fr 1fr;gap:2px 24px;border-bottom:1px solid var(--line)}
.yt-mobile-menu nav a{padding:12px 0;font-size:13px;border-bottom:1px solid var(--line)}}
@media(max-width:680px){.yt-shell{width:calc(100% - 40px)}
.yt-header-inner{min-height:74px;gap:10px}
.yt-brand-name{font-size:26px}
.yt-brand-tag{font-size:8px;margin-top:4px}
.yt-header-actions{gap:7px}
.yt-header-actions .yt-button-small{font-size:11px;min-height:39px;padding:10px 11px;gap:8px}
.yt-header-actions .yt-button-small>span{font-size:16px}
.yt-mobile-menu summary{width:32px;padding:5px}
.yt-mobile-menu summary>span:not(.yt-sr-only){width:22px}
.yt-mobile-menu nav{padding:12px 20px 22px}}
@media(max-width:360px){.yt-shell{width:calc(100% - 32px)}
.yt-brand-name{font-size:23px}
.yt-brand-tag{font-size:7px}
.yt-header-actions .yt-button-small{font-size:10px;padding:10px 8px;gap:5px}
.yt-header-actions{gap:3px}}
.yt-header-actions .yt-button-small{white-space:nowrap}


.yt-button{
  max-width: 100%;
  overflow-wrap: anywhere;
}
.yt-button > span{ flex-shrink: 0; }
@media (max-width: 920px){.yt-mobile-menu summary{ width: 44px; min-height: 44px; }
.yt-mobile-menu nav{
    max-height: calc(100vh - 90px);
    max-height: calc(100dvh - 90px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
.yt-mobile-menu nav a{ min-height: 44px; font-size: 14px; }}
@media (max-width: 680px){.yt-header-actions .yt-button-small{ min-height: 44px; font-size: 12px; }
.yt-mobile-menu summary{ width: 44px; }
.yt-mobile-menu nav{
    max-height: calc(100vh - 74px);
    max-height: calc(100dvh - 74px);
  }}
@media (max-width: 360px){.yt-header-actions .yt-button-small{ padding-inline: 8px; gap: 5px; }}
html{scroll-padding-top:110px}@media(max-width:680px){html{scroll-padding-top:90px}}

.yt-site-header .yt-button{color:white}.yt-mobile-menu summary{list-style:none;cursor:pointer}.yt-mobile-menu summary::-webkit-details-marker{display:none}