function Header({ page, onNavigate }) {
  const links = ['Behandlung', 'Preise', 'Über uns'];
  const goToContact = (e) => {
    e.preventDefault();
    if (page !== 'Home') onNavigate('Home');
    setTimeout(() => document.getElementById('kontakt')?.scrollIntoView({ behavior: 'smooth' }), page !== 'Home' ? 50 : 0);
  };
  const goToTreatments = (e) => {
    e.preventDefault();
    if (page !== 'Home') onNavigate('Home');
    setTimeout(() => document.getElementById('behandlungen')?.scrollIntoView({ behavior: 'smooth' }), page !== 'Home' ? 50 : 0);
  };
  return (
    <header
      style={{
        position: 'sticky',
        top: 0,
        zIndex: 10,
        background: 'var(--surface-card)',
        borderBottom: '1px solid var(--border-subtle)',
      }}
    >
      <div
        style={{
          maxWidth: 'var(--container-max)',
          width: '100%',
          boxSizing: 'border-box',
          margin: '0 auto',
          padding: '10px var(--space-6)',
          display: 'flex',
          alignItems: 'center',
          justifyContent: 'space-between',
          gap: 'var(--space-3)',
          flexWrap: 'nowrap',
        }}
      >
        <div
          onClick={() => onNavigate('Home')}
          style={{ cursor: 'pointer', display: 'flex', alignItems: 'center', flexShrink: 1, minWidth: 0 }}
        >
          <img src="data:image/svg+xml;base64,<?xml version="1.0"?>
<svg id="Ebene_1" xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 313.9 121.3">
  
  <path fill="#FFFFFF" d="M276.1,97.9v-3.6l2.2-2.3,4.5,5.9h1.3l-5.1-6.6,4.8-5.2h-1.3l-6.5,6.9v-6.9h-1.1v11.8h1.1ZM267.8,86.1h-1.1v11.8h1.1v-11.8ZM258.5,97.9h1v-11.8h-1.1v9.8l-7.8-9.8h-.9v11.8h1.1v-9.7l7.7,9.7ZM241.4,86.1v5.3h-7v-5.3h-1.1v11.8h1.1v-5.5h7v5.5h1.2v-11.8h-1.2ZM217.2,94.1c.3.7.7,1.4,1.1,1.9.5.6,1.1,1,1.7,1.4.7.4,1.4.5,2.2.5s.9,0,1.4-.2c.5-.1.9-.3,1.3-.5.4-.2.8-.5,1.1-.9.3-.3.6-.7.8-1.2l-1-.5c-.2.4-.4.7-.7,1-.3.3-.6.5-.9.7-.3.2-.7.3-1,.4-.3,0-.7.1-1,.1-.6,0-1.2-.1-1.8-.4-.5-.3-1-.6-1.4-1.1-.4-.5-.7-1-.9-1.6-.2-.6-.3-1.2-.3-1.9s0-1.2.3-1.8c.2-.6.5-1.1.8-1.6.4-.5.8-.8,1.4-1.1.5-.3,1.2-.4,1.9-.4s.6,0,1,.1c.3,0,.7.2,1,.4.3.2.6.4.9.6.3.3.5.6.7,1l.9-.6c-.4-.8-.9-1.4-1.7-1.9-.7-.5-1.6-.7-2.7-.7s-1.7.2-2.4.5-1.3.8-1.8,1.4c-.5.6-.8,1.2-1.1,1.9-.2.7-.4,1.4-.4,2.1s.1,1.5.4,2.2M204.4,96.9v-4.5h5.8v-1h-5.8v-4.3h6.6v-1h-7.8v11.8h7.9v-1h-6.8ZM197.3,86.1h-9.6v1h4.2v10.8h1.2v-10.8h4.2v-1ZM156.9,97.9v-11.8h-1.2l-4.6,8.1-4.6-8.1h-1.2v11.8h1.1v-9.7l4.3,7.5h.7l4.3-7.5v9.7h1.1ZM131.5,96.5c-.5-.3-.9-.6-1.2-1.1-.3-.5-.5-1-.6-1.6-.1-.6-.2-1.2-.2-1.8v-6h-1.1v6c0,.8,0,1.5.2,2.2.2.7.4,1.3.8,1.9.4.6.9,1,1.5,1.3.6.3,1.4.5,2.4.5s1.7-.2,2.3-.5c.6-.3,1.1-.8,1.5-1.3.4-.5.7-1.2.9-1.9.2-.7.3-1.5.3-2.3v-6h-1.2v6c0,.6,0,1.2-.2,1.8-.1.6-.3,1.1-.6,1.6-.3.5-.7.8-1.2,1.1-.5.3-1.1.4-1.9.4s-1.3-.1-1.8-.4M114.8,96.5c-.5-.3-.9-.6-1.2-1.1-.3-.5-.5-1-.6-1.6-.1-.6-.2-1.2-.2-1.8v-6h-1.1v6c0,.8,0,1.5.2,2.2.2.7.4,1.3.8,1.9.4.6.9,1,1.5,1.3.6.3,1.4.5,2.4.5s1.7-.2,2.3-.5c.6-.3,1.1-.8,1.5-1.3.4-.5.7-1.2.9-1.9.2-.7.3-1.5.3-2.3v-6h-1.2v6c0,.6,0,1.2-.2,1.8-.1.6-.3,1.1-.6,1.6-.3.5-.7.8-1.2,1.1-.5.3-1.1.4-1.9.4s-1.3-.1-1.8-.4M98.2,97.9v-3.6l2.2-2.3,4.5,5.9h1.3l-5.1-6.6,4.8-5.2h-1.3l-6.5,6.9v-6.9h-1.1v11.8h1.1ZM88.1,93.3h-4.8l2.4-5.8,2.4,5.8ZM81.5,97.9l1.5-3.7h5.3l1.5,3.7h1.2l-4.9-11.8h-.9l-4.9,11.8h1.2ZM65.8,86.1l4.9,11.8h1l4.9-11.8h-1.2l-4.2,10.4-4.2-10.4h-1.2Z"></path>
  <path fill="#FFFFFF" d="M245.6,76.5c1.2,0,1.6-1.3,1.8-2.1,2.3-6.7,11.8-30.2,17.1-30.2.2.4,0,.9,0,1.2,0,1.2,0,2.2-.2,3.3-.9,5.6-1.8,11.4-3,17v1c0,.5.8.8,1.2.8s.8-.3,1.1-.6c1.6-3.1,3.3-6,6.1-8.2.4-.4,1-.9,1.5-.9,1.3,0,2.5,4.4,3.2,5.4,1,1.2,2.4,2,4,2,4.9,0,8.9-4,12.3-7,.2,0,1.6-1.5,1.8-1.7.5-.5,1.3-.8,1.3-1.6s-.5-1.2-1.1-1.2-1.5.8-1.9,1.3c-.2,0-1.6,1.5-1.7,1.6l-2.5,2.1c-2.2,1.9-4.9,4.1-8.1,4.1s-2.5-1.9-3.2-3.5c-.8-1.6-1.9-3.9-4.1-3.9s-4.7,3.1-6.2,4.6v-.2c0-1,.9-5.4,1.1-6.4.4-2.5,1-5.3,1-8.1s-.5-3.6-2.4-3.6c-4,0-8.8,8-10.4,11.2-1.9,3.7-3.7,7.4-5.4,11.3h0c0-.3,1.6-7.5,2.3-10.4.7-3.2,1.6-6.3,2.3-9.4,0-.3,0-.4,0-.6,0-.8-.5-1.3-1.3-1.3s-1,.4-1.1,1c-2,7.8-4.1,15.7-5.5,23.7,0,.4-.8,4.9-1,6.4,0,.6-.2,1.1-.2,1.7v.5c0,.4.6.8,1.1.8M219.2,78.3c.7,0,1.3-.5,1.5-1.1,2.1-6.5,4.6-12.9,7.9-18.9.7-1.2,3.7-6.1,4.3-6.1v.4c.7,3.9.9,9,6,9s5.8-1.8,8.2-3.5c.5-.3,2.7-1.8,3.2-2.2.3-.2.4-.5.4-.9,0-.7-.4-1.2-1.1-1.2s-1.4.6-1.8,1c-2.4,1.7-5.8,4.5-8.9,4.5s-1.3,0-1.7-.4c-2.2-1.7-.9-9.6-3.8-9.6-4.2,0-10.8,16.2-12.1,19.6v.2c.4-3.2,1.3-6.4,2.2-9.3l4.8-13.9c0-.7-.2-1.6-1.1-1.6s-1.1.5-1.3,1.1l-4.5,13.1c-1.8,5.1-3.4,11.6-3.4,17.2s0,2.6,1.3,2.6M197.8,69.9c-.9,0-1.1-2.5-1.1-3v-1.4c0-4.7,2.8-11.9,6.4-15.2.2,1.4.5,2.5,1.2,3.8,0,3.4-2.1,15.8-6.5,15.8M197.8,72.2c5,0,7.2-8.1,8.1-11.7.3-1.2.4-2.4.8-3.6,2,1.6,4.7,2.6,7.3,2.6s8.7-1.8,10.8-4.2c.2-.2.2-.4.2-.6,0-.7-.5-1.2-1.2-1.2-1,0-1.8,1-2.7,1.5-2.2,1.2-4.5,2-7.1,2s-5-1.1-6.8-3.1c-.7-.8-.5-2-.6-3.1-.2-1.2-.9-3.8-2.5-3.8s-1.7.8-2.4,1.5c-4.1,3.8-7.3,11.4-7.3,17s.2,6.7,3.5,6.7M173.4,95.9c-2.1-2.7-2.4-8.8-2.4-12.2s0-6.9.7-10.2h.2c0,0,.7,1.4.7,1.4,1.7,3,2.5,11,2.5,14.3s-.2,4.7-1.4,6.6c0,0-.2.2-.3.2M176.1,53.4c.3-1.7,1.7-5.5,2.4-7.2.7-1.5,3.2-7.4,3.6-8.3,3.3-7.5,8.2-16.5,14.1-22.2.4-.4,1.1-.9,1.7-.9,0,4.5-5.5,15.5-7.8,19.4-3.2,5.8-9.3,14.8-14,19.2M173.5,98.5c3.4,0,3.9-7.3,3.9-9.6,0-4.1-.7-9.9-2.2-13.9-.4-1.2-1.1-2.1-1.6-3.2,8.5-2.2,12.1-4.8,18.8-10,.2,0,.8-.6,1-.8l5.8-5.8c0,0,0-.5,0-.7,0-.7-.5-1.1-1.1-1.1s-1.3.6-1.6,1.1c-.8.7-4.2,4.1-4.9,4.9-5.7,4.9-10.5,7.6-17.8,9.9l-1.7.5c.5-3.7,1.6-9.3,2.8-12.9,3.3-1.6,5.5-4.8,7.8-7.6,5.6-6.6,11.3-16.9,14.6-24.7,1-2.3,2.8-7.1,2.8-9.6s-.6-2.6-2.2-2.6c-7.7,0-19.8,27.8-22.8,36.3-3.7,10.6-6.5,23.8-6.5,35.1s.8,14.7,4.9,14.7M128.7,53.9c-.6,0-1.6-.6-1.6-1.2s.4-.6.5-.8c.8-.8,2.6-3.1,4.1-3.1s.3.2.4.4v.5c0,1.7-1.6,4.2-3.4,4.2M126.3,77c4.7,0,10.7-6.1,13.8-9.5,1.3-1.4,10.2-11.4,10.2-12.7s-.5-1.1-1.2-1.1-1.2.7-1.6,1.2c-.9,1.4-2,2.9-3.2,4.1-2.2,2.6-4.7,5.6-7.2,8.2-2,2.1-7.5,7.5-10.8,7.5s-3.8-4.6-3.8-7.1c0-4.3,1.2-8.2,3-12.1,0,0,.2-.3.2-.3.9.8,1.7,1.3,2.9,1.3,3.2,0,5.7-3.6,5.7-6.6s-.9-3.2-2.7-3.2c-2.6,0-5.6,3.4-7,5.4-2.7,4.2-4.6,10.5-4.6,15.4s.3,5.9,3,8.4c.8.8,2,1.2,3.1,1.2M94.2,78.3c.7,0,1.3-.5,1.5-1.1,2.1-6.5,4.6-12.9,7.9-18.9.7-1.2,3.7-6.1,4.3-6.1v.4c.7,3.9.9,9,6,9s5.8-1.8,8.2-3.5c.5-.3,2.7-1.8,3.2-2.2.3-.2.4-.5.4-.9,0-.7-.4-1.2-1.1-1.2s-1.4.6-1.8,1c-2.4,1.7-5.8,4.5-8.9,4.5s-1.3,0-1.7-.4c-2.2-1.7-.9-9.6-3.8-9.6-4.2,0-10.8,16.2-12.1,19.6v.2c.4-3.2,1.3-6.4,2.2-9.3l4.8-13.9c0-.7-.2-1.6-1.1-1.6s-1.1.5-1.3,1.1l-4.5,13.1c-1.8,5.1-3.4,11.6-3.4,17.2s0,2.6,1.3,2.6M79.5,75.3c3.3,0,5.7-2.5,8.1-4.5,4.5-3.9,7.7-9,11-13.8.4-.6,1.3-1.5,1.3-2.2s-.5-1.1-1.2-1.1-1.3.8-1.6,1.5c-2.8,4-5.5,8.2-8.9,11.7-1.6,1.9-5.9,5.9-8.4,5.9h-.6c-1.6-.5-1.5-3.2-1.5-4.6,0-5.9,2.1-11.7,4.3-17.2.3-.7.7-1.4.7-2s-.6-1.4-1.4-1.4-.5,0-.7.2c-.7.6-1.3,1.4-1.8,2l-8,10c-.9,1.2-4.1,4.8-5.1,4.8s-.4-.9-.4-1.1v-.9c0-4.9,2.1-9.8,4.4-14.2.2-.4.3-.5.3-1s-.4-1.1-1.1-1.1-1.2.6-1.5,1.2c-2.2,4.8-4.6,9.8-4.6,15s.5,4.3,2.7,4.3,5.9-4.2,7.4-5.9l4.9-6.3.2-.2v.2c-1.5,4.4-2.8,8.8-2.8,13.5s.5,7,4.4,7M35.3,78.2c0-3,4.9-7.8,6.9-9.7,0-.2.6-.6.6-.6h0c0,0-1.1,2.1-1.1,2.1-.9,1.6-4.7,7.4-6.5,8.2M18.4,106.2c.7,0,1.2-.4,1.4-1,1.4-4.1,2.1-8.2,3.5-12.3,2.4-6.9,4.7-13.8,7.4-20.5,1.9-4.8,11.3-24.1,16-24.1s.9,1.2.9,1.7v1c0,4-1,7.7-2.3,11.3-.2.5-.3.8-.7,1.1-.2.2-2,1.6-2.2,1.7-3.7,3-9.5,8.7-9.5,13.6s.6,2.1,1.9,2.1c4,0,9.5-9.9,11.1-13.6l.9-2.3c.3-.5.6-.6,1-.9,4.4-3.1,8.4-5.3,13.5-7,.2,0,1.5-.4,1.6-.5.2,0,1.7-.6,1.9-.6.8-.3,1.7-.2,1.7-1.5s-.4-1.2-1.2-1.2-.4,0-.7,0c-6.6,2-10.2,3.3-16.2,7.1,0-.9.5-2,.7-2.9.5-2.1.9-4.4.9-6.6s-.6-5-3.4-5-6.8,4.6-8.4,7.2c-4,5.8-8.6,15.3-11.1,21.8l-5.2,14.7-.8,2.1v-.4l.6-2.7,3.7-15.2,1-3.6,7.8-25.5.6-2.3c.3-1,.9-2.3.9-3.5s-.4-1.2-1.1-1.2c-1,0-1.2,1-1.4,1.7l-9,29.9-4.4,17.8c-1.3,5-2.4,11.8-2.4,17.1s0,2.3,1.2,2.3"></path>
</svg>" alt="pure form" style={{ height: 56, maxWidth: '100%', display: 'block' }} />
        </div>
        <nav style={{ display: 'flex', gap: 'var(--space-3)', marginLeft: 'var(--space-9)', marginRight: 'var(--space-3)', flexShrink: 0, flexWrap: 'nowrap' }}>
          {links.map((l) => (
            <a
              key={l}
              onClick={l === 'Behandlung' ? goToTreatments : (e) => { e.preventDefault(); onNavigate(l); }}
              href="#"
              style={{
                fontFamily: 'var(--font-sans-body)',
                fontSize: '0.75rem',
                letterSpacing: 'var(--tracking-eyebrow)',
                textTransform: 'uppercase',
                whiteSpace: 'nowrap',
                color: page === l ? 'var(--brand-primary)' : 'var(--text-primary)',
              }}
            >
              {l}
            </a>
          ))}
          <a
            onClick={goToContact}
            href="#kontakt"
            style={{
              fontFamily: 'var(--font-sans-body)',
              fontSize: '0.75rem',
              letterSpacing: 'var(--tracking-eyebrow)',
              textTransform: 'uppercase',
              whiteSpace: 'nowrap',
              color: 'var(--text-primary)',
            }}
          >
            Kontakt
          </a>
        </nav>
        <button
          onClick={() => onNavigate('Buchung')}
          style={{
            marginLeft: 'calc(-1 * var(--space-8))',
            flexShrink: 0,
            background: 'var(--cta-bg)',
            color: 'var(--cta-text)',
            border: 'none',
            borderRadius: 'var(--radius-pill)',
            padding: '12px 18px',
            fontFamily: 'var(--font-sans-body)',
            fontSize: '0.75rem',
            fontWeight: 500,
            letterSpacing: 'var(--tracking-button)',
            textTransform: 'uppercase',
            cursor: 'pointer',
            whiteSpace: 'nowrap',
          }}
        >
          Termin buchen
        </button>
      </div>
    </header>
  );
}

window.Header = Header;