/* Shared navigation, matching the gear calculator. */
.masthead{height:76px;display:flex;align-items:center;justify-content:flex-start;gap:40px;padding:0 max(24px,calc((100vw - 1420px)/2));background:var(--color-paper);color:var(--color-ink);border-bottom:1px solid var(--color-rule);font-size:14px;line-height:1.5}
.masthead .brand{flex:none;font-family:'Arial Black','Apple SD Gothic Neo','Malgun Gothic',sans-serif;font-size:34px;font-weight:900;letter-spacing:-3px;line-height:1;text-decoration:none}
.masthead .site-tabs{display:flex;gap:28px;height:100%;align-items:stretch;min-width:0;margin:0;overflow-x:auto}
.masthead .site-tabs a{display:flex;align-items:center;flex:none;height:100%;padding:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;color:var(--color-muted);text-decoration:none;white-space:nowrap;font-size:14px;line-height:1.5}
.masthead .site-tabs a[aria-current="page"]{color:var(--color-ink);border-bottom-color:var(--color-ink);font-weight:700}
.masthead .site-tabs a:hover{color:var(--color-ink)}
.masthead .language-control{display:flex;align-items:center;margin-left:auto;flex:none;min-width:0}
.masthead .language-control select{width:auto;max-width:170px;min-height:42px;padding:8px 10px;border:1px solid var(--color-rule);border-radius:4px;background:var(--color-surface);color:var(--color-ink);font-size:13px}
@media(max-width:650px){.masthead{height:auto;min-height:76px;flex-wrap:wrap;gap:0 20px;padding:14px 16px 0}.masthead .brand{font-size:30px}.masthead .language-control{order:1}.masthead .language-control select{max-width:170px}.masthead .site-tabs{order:2;flex-basis:100%;height:48px;gap:24px;margin-top:6px}.masthead .site-tabs a{font-size:13px}}

.copy-team,#copy-link,#marker-share{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none;touch-action:manipulation}