/* ── GLOBAL ── */
  .container { max-width: 960px; margin: 0 auto; padding: 0 24px; }

  /* ── HEADER (via include-html.js) ── */
  header {
    padding: 20px 0;
    background: rgba(10,14,26,0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
  }
  header .container { display: flex; justify-content: space-between; align-items: center; }
  .logo { font-size: 22px; font-weight: 700; text-decoration: none; color: var(--text); letter-spacing: -0.02em; transition: opacity 0.2s; }
  .logo:hover { opacity: 0.8; }
  .logo span { background: linear-gradient(135deg, #00c9a7, #00e5c0); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
  .header-right { display: flex; align-items: center; gap: 20px; }
  #main-nav { display: flex; gap: 22px; align-items: center; }
  #main-nav a { color: var(--text-muted); text-decoration: none; font-weight: 500; font-size: 0.95em; transition: color 0.2s; position: relative; }
  #main-nav a:hover, #main-nav a.active { color: var(--text); }
  #main-nav a::after { content: ""; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: linear-gradient(135deg, #00c9a7, #00e5c0); transition: width 0.2s; }
  #main-nav a:hover::after, #main-nav a.active::after { width: 100%; }
  .lang-switcher { display: flex; gap: 4px; }
  .lang-link { color: var(--text-muted); font-weight: 600; font-size: 0.88em; text-decoration: none; padding: 5px 11px; border-radius: 6px; transition: all 0.2s; }
  .lang-link img { width: 20px; height: 15px; display: block; border-radius: 2px; }
  @media (max-width: 640px) { .lang-link img { width: 24px; height: 18px; } }
  .lang-link:hover { color: var(--text); background: rgba(255,255,255,0.07); }
  .lang-link.active { color: var(--text); background: var(--accent-glow); }

  /* ── HAMBURGER ── */
  .menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px; height: 36px;
    padding: 6px;
    background: none;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 7px;
    cursor: pointer;
    transition: border-color 0.2s;
    flex-shrink: 0;
  }
  .menu-toggle::before,
  .menu-toggle::after,
  .menu-toggle span {
    content: "";
    display: block;
    height: 2px;
    width: 100%;
    background: rgba(255,255,255,0.7);
    border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
  }
  .menu-toggle:hover { border-color: rgba(0,201,167,0.4); }

  @media (max-width: 640px) {
    .menu-toggle { display: flex; }
    #main-nav {
      display: none;
      position: absolute;
      top: 100%;
      left: 0; right: 0;
      background: rgba(10,14,26,0.97);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 16px 24px;
      flex-direction: column;
      gap: 0;
      z-index: 99;
    }
    #main-nav.open { display: flex; }
    #main-nav a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.06); font-size: 1em; }
    #main-nav a:last-child { border-bottom: none; }
  }

  /* ── FOOTER ── */
  footer { padding: 28px 0; border-top: 1px solid var(--border); text-align: center; }
  footer p { font-size: 0.85em; color: var(--text-dim); margin-bottom: 10px; }
  footer a { color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
  footer a:hover { color: var(--text); }
  .footer-links { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
  .footer-sep { color: var(--text-dim); }

  /* ── PAGE HEADER (konsistent auf allen Seiten) ── */
  .tool-header, .page-header {
    text-align: left;
    margin-bottom: 40px;
  }
  .tool-header h1, .page-header h1, main > .container > h1, .article-hero h1 {
    font-size: clamp(2em, 5vw, 3em);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #00c9a7, #00e5c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .tool-header p, .page-header p {
    font-size: 1.1em;
    color: var(--text-muted);
    margin-bottom: 8px;
  }

  /* ── LOGO IMAGE ── */
  .logo img { height: 50px; width: auto; display: block; }
  @media (max-width: 640px) {
    .logo img { height: 30px; }
  }