/* A compact, single-row masthead. Uses the visitor's system font. */
.masthead{position:relative;z-index:30;background:var(--paper);border-bottom:1px solid var(--line);font-family:inherit}
.masthead-main{max-width:1160px;margin:auto;padding:16px 32px;display:flex;align-items:center;gap:30px;min-height:76px}
.masthead .masthead-brand{gap:9px;color:var(--ink);text-decoration:none}
.masthead .masthead-brand img{width:34px;height:34px;flex-shrink:0}
.masthead-brand>span{font-size:21px;font-weight:700;letter-spacing:-.8px;line-height:1.1;white-space:nowrap}
.masthead .top-nav{display:flex;align-items:center;gap:3px;margin:0 auto}
.masthead .top-nav>a,.masthead .nav-dropdown>.nav-menu-button{position:relative;display:flex;align-items:center;justify-content:center;gap:6px;padding:11px 10px;border:0;border-radius:8px;background:transparent;color:var(--muted);font:500 13px/1.4 var(--font-sans);letter-spacing:-.15px;white-space:nowrap;cursor:pointer;transition:background .15s,color .15s}
.masthead .top-nav>a[aria-current=page],.masthead .nav-current>.nav-menu-button{color:var(--ink);font-weight:600}
.masthead .top-nav>a[aria-current=page]:after,.masthead .nav-current>.nav-menu-button:after{content:"";position:absolute;bottom:1px;left:10px;right:10px;height:2px;border-radius:2px;background:var(--accent)}
.masthead .top-nav>a:hover,.masthead .nav-dropdown>.nav-menu-button:hover,.masthead .nav-dropdown.is-open>.nav-menu-button{background:var(--soft);color:var(--accent)}
.masthead .nav-dropdown>.nav-menu-button>svg{width:13px;height:13px;transition:transform .16s}
.masthead .nav-dropdown.is-open>.nav-menu-button>svg{transform:rotate(180deg)}
.masthead-actions{display:flex;align-items:center;gap:9px;margin-left:auto}
.masthead-search{height:38px;display:flex;align-items:center;gap:8px;padding:0 11px;border:1px solid transparent;border-radius:9px;background:var(--soft);color:var(--muted);font:400 12px/1 var(--font-sans);white-space:nowrap;cursor:pointer;transition:background .15s,border-color .15s}
.masthead-search svg{width:17px;height:17px;flex-shrink:0}
.masthead-search kbd{margin-left:10px;padding:3px 4px;font:400 10px/1 var(--font-sans);border:1px solid var(--line);border-radius:4px;background:var(--paper);color:var(--muted)}
.masthead-search:hover{border-color:#b4c5f8;color:var(--accent)}
.masthead .nav-account>.masthead-account-toggle{width:38px;height:38px;padding:0;border:1px solid var(--line);border-radius:50%;color:var(--ink)}
.masthead .nav-account>.masthead-account-toggle>svg{width:18px;height:18px;transform:none}
.masthead-write{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:38px;padding:0 14px;border:1px solid var(--ink);border-radius:20px;background:var(--ink);color:var(--paper);font-size:12px;line-height:1.4;font-weight:500;white-space:nowrap;transition:background .15s,border-color .15s}
.masthead-write:hover{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}
.masthead-write svg{width:15px;height:15px}
.masthead-menu-toggle{display:none}
.masthead .nav-flyout,.masthead .nav-writers .nav-flyout{top:calc(100% + 12px);left:0;width:230px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 110px);overflow-y:auto;padding:7px;background:var(--paper);border:1px solid var(--line);border-radius:13px;box-shadow:0 8px 30px #18253b16;display:block;animation:nav-reveal .12s ease-out}
.masthead .nav-dropdown.is-open:before{content:"";position:absolute;top:100%;left:0;right:0;height:14px}
.masthead .nav-flyout[hidden]{display:none!important}
.nav-menu-label{display:block;padding:9px 11px 7px;color:var(--muted);font-size:10px;font-weight:500;letter-spacing:.2px}
.masthead .nav-simple-menu>a,.masthead .nav-writers .nav-simple-menu>a,.masthead .account-logout button,.masthead .nav-theme-toggle{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 11px;border-radius:7px;font-size:13px;font-weight:400;line-height:1.45;letter-spacing:0;color:var(--ink);text-align:left;transition:background .14s,color .14s;overflow-wrap:anywhere}
.masthead .nav-simple-menu>a:hover,.masthead .nav-simple-menu>a:focus-visible,.masthead .nav-theme-toggle:hover{background:var(--soft);color:var(--accent)}
.masthead .nav-simple-menu .nav-menu-all{margin-top:6px;border-top:1px solid var(--line);border-radius:0;padding-top:13px;padding-bottom:11px;color:var(--accent);font-weight:500}
.nav-menu-all svg{width:14px;height:14px}
.masthead .nav-account .nav-flyout{left:auto;right:0;width:220px}
.account-logout{margin:5px 0 0;padding-top:5px;border-top:1px solid var(--line)}
.masthead .account-logout button{width:100%;background:none;border:0;color:#a8383b;cursor:pointer}
.masthead .account-logout button:hover,.masthead .account-logout button:focus-visible{background:#fff0f0;color:#8b2528}
.masthead .nav-theme-toggle{width:100%;justify-content:flex-start;background:transparent;border:0;border-top:1px solid var(--line);border-radius:0;margin-top:5px;padding-top:13px;color:var(--muted);font-size:12px;cursor:pointer}
.nav-theme-toggle svg{width:15px;height:15px;flex-shrink:0}
.public-mobile-menu{position:relative;z-index:29;font-family:inherit}
.mobile-account-links{display:grid;border-top:1px solid var(--line);margin-top:12px;padding-top:17px}
.mobile-account-label{font-size:12px;color:var(--muted);padding:0 8px 7px;font-weight:500}
.mobile-account-links>a,.mobile-account-links .account-logout button{display:block;width:100%;text-align:left;padding:11px 8px;font-size:14px;color:var(--ink);font-weight:400;border:0;background:none;border-radius:7px}
.mobile-account-links>a:hover{background:var(--soft);color:var(--accent)}
.mobile-account-links .account-logout button{color:#a8383b}
.mobile-account-links .account-logout button:hover{background:#fff0f0}
.mobile-menu-theme{display:flex;gap:9px;align-items:center;background:transparent;border:0;border-top:1px solid var(--line);padding:16px 6px 3px;margin-top:12px;font-size:12px;color:var(--muted)}
.mobile-menu-theme svg{width:16px;height:16px}
.mobile-primary-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.mobile-primary-links>a{display:flex;align-items:center;gap:9px;padding:14px 12px;background:var(--soft);border-radius:10px;color:var(--ink);font-size:13px;font-weight:500;min-height:48px}
.mobile-primary-links svg{width:18px;height:18px;flex-shrink:0;color:var(--accent)}
.mobile-primary-links a:hover,.mobile-primary-links a[aria-current=page]{color:var(--accent)}.mobile-primary-links a[aria-current=page]{box-shadow:inset 0 0 0 1px #b4c5f8;background:#eef3ff}body.dark .mobile-primary-links a[aria-current=page]{background:var(--soft)}
.mobile-topic-links{padding:17px 3px 4px}.mobile-menu-label{display:block;margin-bottom:10px;color:var(--muted);font-size:12px;font-weight:500}.mobile-topic-links>div{display:flex;flex-wrap:wrap;gap:8px}.mobile-topic-links a{padding:9px 12px;border:1px solid var(--line);border-radius:20px;font-size:13px;color:var(--ink);line-height:1.3}.mobile-topic-links a:hover{border-color:var(--accent);background:var(--soft);color:var(--accent)}
.masthead a:focus-visible,.masthead button:focus-visible,.public-mobile-menu a:focus-visible,.public-mobile-menu button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
body.dark .account-logout button{color:#ffb3b3}body.dark .account-logout button:hover{background:#452b36;color:#ffd2d2}
/* The trail is a quiet navigation row, separate from the article heading. */
.public-body .page-trail{display:block;margin:0;padding:22px 0 24px;font-size:12px;line-height:1.4}
.page-trail ol{display:flex;align-items:center;gap:6px;min-width:0;list-style:none;margin:0;padding:0}
.page-trail li{display:flex;align-items:center;gap:6px;min-width:0}
.page-trail li:last-child{flex:0 1 auto}
.page-trail a{display:inline-flex;align-items:center;white-space:nowrap;color:var(--muted);padding:5px 3px;border-radius:5px}
.page-trail a:hover{color:var(--accent)}
.page-trail a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.page-trail .trail-home a{display:grid;place-items:center;width:29px;height:29px;padding:0;background:var(--soft);border-radius:8px;color:var(--ink)}
.page-trail .trail-home svg{width:14px;height:14px}
.page-trail .trail-chevron{width:13px;height:13px;flex-shrink:0;color:#929ba6}
.page-trail .trail-current{min-width:0;padding:5px 9px;border-radius:6px;background:#eef3ff;color:#3659b2;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
body.dark .page-trail .trail-current{background:#253655;color:#adc1ff}
@keyframes nav-reveal{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1100px){.masthead-main{gap:23px;padding-inline:25px}.masthead-search kbd{display:none}.masthead-brand>span{font-size:20px}.masthead .top-nav>a,.masthead .nav-dropdown>.nav-menu-button{padding-inline:9px}.masthead-actions{gap:8px}}
@media(max-width:1000px){.masthead-search{width:36px;justify-content:center;padding:0}.masthead-search>span{display:none}.masthead-main{gap:18px}.masthead-write{padding-inline:12px}}
@media(max-width:900px){.masthead-main{padding:15px 25px;min-height:68px;justify-content:space-between}.masthead .top-nav,.masthead-write,.masthead .nav-account{display:none}.masthead-actions{gap:8px}.masthead-search{width:38px;height:38px}.masthead .masthead-menu-toggle{display:grid;width:38px;height:38px;border:1px solid var(--line);border-radius:9px;background:var(--paper)}.masthead-menu-toggle[aria-expanded=true]{background:var(--soft);color:var(--accent);border-color:var(--accent)}.public-mobile-menu:not([hidden]){display:block!important}.public-mobile-menu .mobile-menu-inner{padding:8px 25px 22px}}
@media(max-width:760px){.masthead-main{padding:13px 20px;min-height:66px}.masthead .masthead-brand img{width:31px;height:31px}.masthead-brand>span{font-size:20px}.masthead .masthead-search,.masthead .masthead-menu-toggle{width:36px;height:36px}.public-mobile-menu .mobile-menu-inner{padding-inline:20px}.public-body .page-trail{padding:18px 0 20px;font-size:12px}.page-trail ol,.page-trail li{gap:4px}.page-trail .trail-current{padding-inline:7px}}
@media(max-width:390px){.masthead-main{padding-inline:16px}.masthead-brand>span{font-size:19px}.masthead-actions{gap:6px}.masthead .masthead-brand{gap:7px}.page-trail a{max-width:112px;overflow:hidden;text-overflow:ellipsis}.page-trail li:not(:last-child) a{flex-shrink:0}.page-trail li{flex-shrink:1}}
@media(prefers-reduced-motion:reduce){.masthead .nav-flyout{animation:none}.masthead *{transition:none!important}}