/* One identity and one accessible, native menu across all three pages. */
.site-header{max-width:1200px;margin:auto;padding:12px 32px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);position:relative;z-index:30}
.site-header .brand{display:inline-flex;align-items:center;gap:9px;flex:none;white-space:nowrap;font:800 22px/1.2 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-.7px;text-decoration:none;color:var(--ink)}
.site-header .brand em{font-style:normal;font-weight:400;color:var(--muted)}
.site-header .brand img{display:block;width:30px;height:30px}
.site-menu{position:relative;font:13px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}
.site-menu>summary{min-height:44px;display:flex;align-items:center;gap:18px;padding:8px 12px;border:1px solid var(--line);border-radius:9px;cursor:pointer;list-style:none;color:var(--ink);background:var(--card)}
.site-menu>summary::-webkit-details-marker{display:none}
.site-menu>summary::after{content:'+';font-size:19px;color:var(--green)}
.site-menu[open]>summary::after{content:'−'}
.site-menu nav{position:absolute;right:0;top:calc(100% + 8px);width:260px;max-width:calc(100vw - 36px);display:grid;gap:0;padding:8px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px #183c2d18}
.site-header .site-menu nav a,.site-header .site-menu nav a:last-child{display:flex;align-items:center;min-height:48px;padding:10px 12px;text-decoration:none;font-size:13px;color:var(--ink);border-radius:6px}
.site-menu nav a:hover,.site-menu nav a[aria-current=page]{background:var(--paper)}
[hidden]{display:none!important}
@media(max-width:760px){.site-header{padding:8px 18px}.site-header .brand{font-size:20px}.site-header .brand img{width:28px;height:28px}.site-menu>summary{font-size:12px;gap:12px}}
@media(max-width:355px){.site-header{padding-inline:12px}.site-menu>summary{padding-inline:9px;gap:8px}}