/* ==========================================================================
   Seitenkopf langeatn.de, EINE Quelle fuer alle Seiten (11.10.2026)
   Quelle: 02 Projekte/langeatn.de/token-usage-site/inhalt/kopf.css (Struktur in nav.js)
   Kopien auf den Seiten nie von Hand aendern, sondern hier, dann Kopf-einbauen.js
   und Seiten-bauen.js laufen lassen. Referenz fuer Schrift, Farben und Knoepfe ist
   die Startseite, Hoehe fest 76 px, Breite hoechstens 1280 px.
   Alle Regeln haengen an .site-header oder .project-bar und bringen ihre Farben
   selbst mit, damit das CSS der jeweiligen Seite den Kopf nicht verschiebt.
   ========================================================================== */
.site-header,.project-bar,.kopf-fuss{
  --k-ink:#F2EFE8;--k-muted:#A8B9CA;--k-soft:#b3bccb;
  --k-gold:#C9A227;--k-gold-bright:#E8C457;--k-teal:#2DD4BF;--k-teal-bright:#5EEAD4;
  --k-navy:#081120;--k-line:rgba(242,239,232,.13);--k-line-strong:rgba(242,239,232,.22);
  --k-ease:cubic-bezier(.22,1,.36,1);
  --k-sans:'Inter',-apple-system,'Segoe UI',sans-serif;--k-serif:'Cormorant Garamond',Georgia,serif;
}
.site-header *,.site-header *::before,.site-header *::after,.project-bar *{box-sizing:border-box;}

/* Rahmen: mitlaufend, auf der Startseite fixiert (Hero liegt darunter) */
.site-header{position:sticky;top:0;z-index:900;padding:0 5vw;margin:0;font-family:var(--k-sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;border:0;}
.site-header.is-fixed{position:fixed;left:0;right:0;}
.site-header::before{content:"";position:absolute;inset:0;z-index:-1;opacity:0;background:rgba(8,17,32,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--k-line);transition:opacity .4s var(--k-ease);pointer-events:none;}
.site-header.scrolled::before{opacity:1;}
.site-header .site-header-inner{max-width:1280px;height:76px;margin:0 auto;padding:0;display:flex;align-items:center;justify-content:space-between;gap:24px;}

/* Logo */
.site-header .brand{font-family:var(--k-serif);font-size:1.3rem;font-weight:600;letter-spacing:.02em;line-height:1.2;color:var(--k-ink);text-decoration:none;white-space:nowrap;flex:none;}
.site-header .brand .light{font-weight:600;color:var(--k-gold);}

/* Rechte Seite: Menue, Sprachauswahl, Burger */
.site-header .nav-right{display:flex;align-items:center;gap:20px;margin:0;}
.site-header .site-nav{position:static;z-index:auto;display:block;margin:0;padding:0;}
.site-header .nav-links{display:flex;align-items:center;gap:28px;list-style:none;margin:0;padding:0;}
.site-header .nav-links li{list-style:none;margin:0;padding:0;}
.site-header .nav-links a,.site-header .nav-group{position:relative;display:inline-flex;align-items:center;gap:7px;margin:0;padding:4px 0;border:0;border-radius:0;background:none;font-family:var(--k-sans);font-size:.8rem;font-weight:500;letter-spacing:.08em;line-height:1.5;text-transform:uppercase;color:var(--k-muted);text-decoration:none;white-space:nowrap;cursor:pointer;transition:color .3s;}
.site-header .nav-links>li>a::after,.site-header .nav-group::after{content:"";position:absolute;left:0;right:100%;bottom:-4px;height:1px;background:var(--k-gold);transition:right .3s var(--k-ease);}
.site-header .nav-links a:hover,.site-header .nav-group:hover,.site-header .has-sub.open>.nav-group{color:var(--k-ink);}
.site-header .nav-links>li>a:hover::after,.site-header .nav-group:hover::after{right:0;}
/* Wo du gerade bist: Gold-Linie (E5). Startseite setzt .active per Abschnitts-Markierung */
.site-header .nav-links>li>a.active,.site-header .has-sub.active>.nav-group{color:var(--k-gold-bright);}
.site-header .nav-links>li>a.active::after,.site-header .has-sub.active>.nav-group::after{right:0;height:2px;background:var(--k-gold-bright);}

/* Knoepfe Blog und Kontakt */
.site-header .nav-links a.nav-cta,.site-header .nav-links a.nav-blog{border-radius:3px;font-weight:600;transition:background .3s,color .3s,box-shadow .3s,transform .3s var(--k-ease);}
.site-header .nav-links a.nav-cta::after,.site-header .nav-links a.nav-blog::after{display:none;}
.site-header .nav-links a.nav-cta{padding:8px 18px;background:var(--k-gold);color:var(--k-navy);}
.site-header .nav-links a.nav-cta:hover{background:var(--k-gold-bright);color:var(--k-navy);transform:translateY(-2px);box-shadow:0 8px 24px rgba(201,162,39,.35);}
.site-header .nav-links a.nav-blog{padding:7px 17px;border:1px solid rgba(45,212,191,.5);color:var(--k-teal);}
.site-header .nav-links a.nav-blog:hover{background:rgba(45,212,191,.14);color:var(--k-teal-bright);box-shadow:0 6px 18px rgba(45,212,191,.22);}
.site-header .nav-links a.nav-blog.active{background:var(--k-teal);border-color:var(--k-teal);color:var(--k-navy);}
.site-header .nav-links a.nav-blog.active:hover{background:var(--k-teal-bright);border-color:var(--k-teal-bright);color:var(--k-navy);}

/* Untermenues */
.site-header .caret{flex:none;transition:transform .25s var(--k-ease);}
.site-header .has-sub{position:relative;}
.site-header .has-sub.open .caret,.site-header .lang-menu.open .caret{transform:rotate(180deg);}
.site-header .subnav,.site-header .lang-list{position:absolute;z-index:950;list-style:none;margin:0;padding:8px;background:rgba(8,17,32,.97);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--k-line-strong);border-radius:8px;box-shadow:0 24px 50px -18px rgba(0,0,0,.7);}
.site-header .subnav{top:calc(100% + 18px);left:-18px;min-width:260px;}
.site-header .subnav[hidden],.site-header .lang-list[hidden]{display:none;}
.site-header .nav-links .subnav a{display:block;padding:11px 14px;border-radius:5px;font-size:.9rem;letter-spacing:.02em;text-transform:none;color:var(--k-muted);}
.site-header .nav-links .subnav a::after{display:none;}
.site-header .nav-links .subnav a:hover,.site-header .nav-links .subnav a.active{background:rgba(201,162,39,.1);color:var(--k-gold-bright);}

/* Sprachauswahl (E2, E3): ueberall gleich breit, Liste klappt nach unten auf */
.site-header .lang-menu{position:relative;flex:none;margin:0;}
.site-header .lang-btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;width:64px;height:32px;margin:0;padding:0 12px;border:1px solid var(--k-line-strong);border-radius:100px;background:rgba(8,17,32,.55);font-family:var(--k-sans);font-size:.72rem;font-weight:600;letter-spacing:.06em;line-height:1;color:var(--k-ink);cursor:pointer;transition:border-color .25s,color .25s;}
.site-header .lang-btn:hover,.site-header .lang-menu.open .lang-btn{border-color:var(--k-gold);color:var(--k-gold-bright);}
.site-header .lang-list{top:calc(100% + 12px);right:0;min-width:236px;}
.site-header .lang-list li{list-style:none;margin:0;padding:0;}
.site-header .lang-list a,.site-header .lang-list button,.site-header .lang-list span.on,.site-header .lang-list span.off{display:flex;flex-wrap:wrap;align-items:baseline;width:100%;margin:0;padding:10px 12px;border:0;border-radius:5px;background:none;font-family:var(--k-sans);font-size:.9rem;font-weight:500;letter-spacing:.01em;line-height:1.4;text-align:left;text-transform:none;color:var(--k-muted);text-decoration:none;cursor:pointer;outline-offset:-2px;}
.site-header .lang-list .lang-code{display:inline-block;width:34px;font-size:.7rem;font-weight:600;letter-spacing:.06em;}
.site-header .lang-list a:hover,.site-header .lang-list button:hover{background:rgba(201,162,39,.1);color:var(--k-gold-bright);}
.site-header .lang-list .on{color:var(--k-gold-bright);cursor:default;}
.site-header .lang-list .off{opacity:.5;cursor:not-allowed;}
.site-header .lang-list .off small{flex-basis:100%;padding-left:34px;font-size:.74rem;line-height:1.35;}

/* Burger */
.site-header #burger{display:none;position:relative;z-index:960;flex:none;width:32px;height:24px;margin:0;padding:0;border:0;background:none;cursor:pointer;}
.site-header #burger span{position:absolute;left:0;width:100%;height:2px;background:var(--k-ink);transition:all .3s var(--k-ease);}
.site-header #burger span:nth-child(1){top:0;}
.site-header #burger span:nth-child(2){top:11px;}
.site-header #burger span:nth-child(3){top:22px;}
.site-header #burger.open span:nth-child(1){top:11px;transform:rotate(45deg);}
.site-header #burger.open span:nth-child(2){opacity:0;}
.site-header #burger.open span:nth-child(3){top:11px;transform:rotate(-45deg);}

/* Tastatur */
.site-header a:focus-visible,.site-header button:focus-visible,.site-header [tabindex]:focus-visible,.project-bar a:focus-visible{outline:2px solid var(--k-gold-bright);outline-offset:4px;border-radius:2px;}
.site-header .sr-only,.project-bar .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* Handy und schmale Fenster: Menue im Burger, Sprachauswahl bleibt sichtbar */
@media (max-width:1100px){
  .site-header #burger{display:block;}
  .site-header .lang-menu{z-index:960;}
  .site-header .site-nav .nav-links{position:fixed;inset:0;z-index:940;flex-direction:column;justify-content:center;gap:20px;padding:100px 0 40px;overflow-y:auto;background:rgba(8,17,32,.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transform:translateX(100%);visibility:hidden;transition:transform .45s var(--k-ease),visibility 0s .45s;}
  .site-header .site-nav .nav-links.open{transform:none;visibility:visible;transition:transform .45s var(--k-ease);}
  .site-header .nav-links li{text-align:center;}
  .site-header .nav-links a,.site-header .nav-group{font-size:1rem;}
  .site-header .nav-group .caret{display:none;}
  .site-header .subnav{position:static;min-width:0;padding:6px 0 0;background:none;border:0;box-shadow:none;text-align:center;backdrop-filter:none;-webkit-backdrop-filter:none;}
  .site-header .subnav[hidden]{display:block;}
  .site-header .nav-links .subnav a{padding:8px 14px;font-size:.95rem;}
  body.menu-open{overflow:hidden;}
}

/* Projektleiste unter dem Kopf (Token Usage, Hilfeseiten, Buchseite), Titel buendig mit dem Logo */
.project-bar{position:relative;z-index:2;margin:0;padding:0 5vw;border-bottom:1px solid var(--k-line);background:rgba(8,17,32,.45);font-family:var(--k-sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;}
.project-bar .project-bar-inner{max-width:1280px;height:48px;margin:0 auto;padding:0;display:flex;align-items:center;gap:26px;overflow-x:auto;scrollbar-width:none;}
.project-bar .project-bar-inner::-webkit-scrollbar{display:none;}
.project-bar .pb-title{font-family:var(--k-serif);font-size:1.15rem;font-weight:700;line-height:1.2;color:var(--k-ink);white-space:nowrap;}
.project-bar nav{display:flex;gap:4px;margin:0;padding:0;}
.project-bar nav a{padding:6px 14px;border-radius:100px;font-size:.78rem;font-weight:500;letter-spacing:0;line-height:1.5;color:var(--k-soft);text-decoration:none;white-space:nowrap;transition:color .25s,background .25s;}
.project-bar nav a:hover{color:var(--k-ink);}
.project-bar nav a.active{background:rgba(201,162,39,.13);color:var(--k-gold-bright);}
.project-bar nav a[target="_blank"]::after{content:"\2197";margin-left:5px;font-size:.85em;opacity:.7;}

/* Fusszeile (11.10.2026): auf jeder Seite gleich, Impressum, Datenschutz und Kontakt immer dabei.
   Eigene Klasse kopf-fuss, damit alte Regeln der Seiten (footer, .site-footer, .foot-inner) nicht greifen. */
.kopf-fuss *{box-sizing:border-box;}
.kopf-fuss{position:relative;z-index:2;display:block;margin:0;padding:40px 5vw 44px;border:0;border-top:1px solid var(--k-line);background:rgba(8,17,32,.6);font-family:var(--k-sans);font-size:16px;line-height:1.5;color:var(--k-muted);text-align:left;-webkit-font-smoothing:antialiased;}
.kopf-fuss .kf-inner{max-width:1280px;margin:0 auto;padding:0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 40px;}
.kopf-fuss .kf-main{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 28px;margin:0;}
.kopf-fuss p{margin:0;padding:0;font-size:.84rem;line-height:1.5;color:var(--k-muted);}
.kopf-fuss .kf-motto{font-family:var(--k-serif);font-style:italic;font-size:1rem;color:var(--k-gold);}
.kopf-fuss .kf-links{display:flex;flex-wrap:wrap;gap:8px 24px;margin:0;padding:0;}
.kopf-fuss .kf-links a{font-family:var(--k-sans);font-size:.84rem;font-weight:500;letter-spacing:0;text-transform:none;color:var(--k-soft);text-decoration:none;border:0;margin:0;padding:0;transition:color .25s;}
.kopf-fuss .kf-links a:hover{color:var(--k-gold-bright);}
.kopf-fuss .kf-links a:focus-visible{outline:2px solid var(--k-gold-bright);outline-offset:4px;border-radius:2px;}
.kopf-fuss .kf-note{max-width:1280px;margin:16px auto 0;font-size:.78rem;}
@media (max-width:620px){.kopf-fuss .kf-inner{flex-direction:column;align-items:flex-start;}}

@media (prefers-reduced-motion:reduce){.site-header *,.site-header::before,.project-bar *,.kopf-fuss *{transition:none!important;}}
@media print{.site-header,.project-bar{display:none!important;}}