/* Seiten-eigene Ergänzungen — Marken-Tokens (--color-*, inkl. --color-error*) kommen aus assets/site.css. */
    :root {
      --radius: 14px;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      font-weight: 400;
      line-height: 1.6;
      color: var(--color-text);
      background: var(--color-surface);
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    img, svg { display: block; max-width: 100%; }

    h1 {
      font-family: 'Archivo', Arial, Helvetica, sans-serif;
      font-size: clamp(2.2rem, 5vw, 3.2rem);
      font-weight: 600;
      line-height: 1.08;
      letter-spacing: -0.025em;
      color: var(--color-text);
    }
    h1 em {
      font-style: italic;
      font-weight: 600;
      color: var(--color-text);
    }
    p { color: var(--color-text-muted); line-height: 1.72; }

    .container {
      max-width: 1100px;
      margin-inline: auto;
      padding-inline: 32px;
    }
    .eyebrow {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.01em;
      color: var(--color-text);
      margin-bottom: 14px;
    }

    .nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 10px; color: var(--color-text); min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
    .nav-toggle svg { width: 24px; height: 24px; }
    @media (max-width: 900px) {
      .nav-toggle { display: inline-flex; }
    }

    /* ── Header-Section ─────────────────────────────────── */
    .checkout-hero {
      padding: 88px 0 48px;
      background:
        radial-gradient(ellipse 60% 50% at 50% 0%, rgba(150, 220, 20,0.12) 0%, transparent 60%),
        linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
      text-align: center;
      border-bottom: 1px solid var(--color-border);
    }
    .checkout-hero-sub {
      max-width: 540px;
      margin: 20px auto 0;
      font-size: 1.05rem;
      line-height: 1.65;
    }

    /* ── Form-Bereich ───────────────────────────────────── */
    .checkout-main {
      padding: 56px 0 96px;
      background: var(--color-bg);
    }
    .checkout-grid {
      display: grid;
      grid-template-columns: 1fr 340px;
      gap: 32px;
      align-items: start;
    }
    .checkout-card {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    }

    .section-title {
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.01em;
      color: var(--color-text);
      margin: 0 0 18px;
    }
    .section-title + .form-row,
    .section-title + .form-group { margin-top: 0; }
    .checkout-card .section-title:not(:first-child) { margin-top: 32px; }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }
    .form-group { display: flex; flex-direction: column; gap: 7px; margin-bottom: 20px; }
    .form-group:last-child { margin-bottom: 0; }
    .form-group label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--color-text);
    }
    .form-group .form-hint {
      font-weight: 400;
      color: var(--color-text-muted);
      font-size: 0.82rem;
      margin-left: 6px;
    }
    .form-group input,
    .form-group textarea {
      font-family: inherit;
      font-size: 0.95rem;
      color: var(--color-text);
      background: var(--color-bg);
      border: 1.5px solid var(--color-border);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      line-height: 1.5;
      width: 100%;
      transition: border-color 0.2s, background 0.2s;
    }
    .form-group input:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--color-primary);
      background: var(--color-surface);
    }
    .form-group textarea { resize: vertical; min-height: 100px; font-family: inherit; }

    .radio-group {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .radio-card {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 14px 16px;
      border: 1.5px solid var(--color-border);
      border-radius: var(--radius-sm);
      background: var(--color-surface);
      cursor: pointer;
      transition: border-color 0.15s, background 0.15s;
    }
    .radio-card:hover { background: var(--color-primary-soft); }
    .radio-card input[type="radio"] {
      accent-color: var(--color-primary);
      width: 18px; height: 18px;
      flex-shrink: 0;
      cursor: pointer;
    }
    .radio-card-text { display: flex; flex-direction: column; gap: 2px; }
    .radio-card-name {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--color-text);
    }
    .radio-card-price {
      font-size: 0.82rem;
      color: var(--color-text-muted);
    }

    /* ── Summary-Karte (sticky) ─────────────────────────── */
    .summary-card {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      position: sticky;
      top: 96px;
    }
    .summary-product {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--color-text);
      margin-bottom: 4px;
    }
    .summary-plan {
      font-size: 0.9rem;
      color: var(--color-text-muted);
      margin-bottom: 20px;
    }
    .summary-row {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      font-size: 0.95rem;
      color: var(--color-text-muted);
      margin-bottom: 10px;
    }
    .summary-row strong {
      color: var(--color-text);
      font-weight: 700;
    }
    .summary-divider {
      border: none;
      border-top: 1px solid var(--color-border);
      margin: 18px 0;
    }
    .summary-row-main {
      font-size: 1rem;
      color: var(--color-text);
      align-items: baseline;
    }
    .summary-row-main strong {
      font-size: 1.5rem;
      color: var(--color-primary);
      letter-spacing: -0.02em;
    }
    .summary-note {
      font-size: 0.82rem;
      color: var(--color-text-muted);
      margin-top: 18px;
      line-height: 1.55;
    }
    .submit-row {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .submit-btn {
      width: 100%;
      padding: 16px 24px;
      background: var(--color-accent);
      color: var(--color-on-accent);
      border: none;
      border-radius: var(--radius-sm);
      font-family: inherit;
      font-size: 1.05rem;
      font-weight: 700;
      line-height: 1;
      cursor: pointer;
      box-shadow: var(--shadow-accent);
      transition: background 0.2s, box-shadow 0.2s, transform 80ms;
    }
    .submit-btn:hover:not(:disabled) {
      background: var(--color-accent-hover);
      transform: translateY(-2px);
    }
    .submit-btn:active:not(:disabled) { transform: scale(0.98); }
    .submit-btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }  /* Ink-Ring wie überall — auf dem Lime-Button auch besser sichtbar als ein Lime-Ring */
    .submit-btn:disabled { opacity: 0.55; cursor: not-allowed; box-shadow: none; }

    .submit-fine {
      font-size: 0.78rem;
      color: var(--color-text-muted);
      text-align: center;
      line-height: 1.5;
    }

    .error-msg {
      padding: 12px 14px;
      background: var(--color-error-bg);
      border: 1px solid var(--color-error-border);
      border-radius: var(--radius-sm);
      color: var(--color-error);
      font-size: 0.88rem;
      line-height: 1.45;
    }
    .error-msg[hidden] { display: none; }

    @media (max-width: 900px) {
      .checkout-grid { grid-template-columns: 1fr; }
      .summary-card { position: static; }
    }
    @media (max-width: 640px) {
      .container { padding-inline: 20px; }
      .checkout-hero { padding: 56px 0 36px; }
      .checkout-main { padding: 36px 0 64px; }
      .checkout-card { padding: 24px; }
      .form-row { grid-template-columns: 1fr; }
      .radio-group { grid-template-columns: 1fr; }
    }