/* ============================================================
   ZUGFeRD eRechnung – Main Stylesheet
   Design: Authoritative Dark Professional
   ============================================================ */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Core Colors */
  --c-bg:           #0a0f1e;
  --c-bg-2:         #0f172a;
  --c-bg-3:         #1a2642;
  --c-surface:      #162035;
  --c-surface-2:    #1e2d4a;
  --c-border:       rgba(99, 153, 255, 0.12);
  --c-border-strong: rgba(99, 153, 255, 0.25);

  /* Brand */
  --c-accent:       #3b82f6;
  --c-accent-light: #60a5fa;
  --c-accent-glow:  rgba(59, 130, 246, 0.3);
  --c-gold:         #f59e0b;
  --c-gold-light:   #fcd34d;
  --c-success:      #10b981;
  --c-danger:       #ef4444;

  /* Text */
  --c-text:         #e2e8f0;
  --c-text-muted:   #94a3b8;
  --c-text-faint:   #64748b;
  --c-heading:      #f8fafc;

  /* Typography */
  --font-display:   'Lato', sans-serif;
  --font-body:      'Lato', sans-serif;

  /* Spacing */
  --section-pad:    clamp(3rem, 7vw, 6rem);
  --radius:         0.75rem;
  --radius-lg:      1.25rem;

  /* Shadows */
  --shadow-card:    0 4px 32px rgba(0,0,0,0.4), 0 1px 0 rgba(99,153,255,0.08) inset;
  --shadow-glow:    0 0 40px rgba(59,130,246,0.2);
}

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

html.no-js .js-only { display: none; }

body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Skip Navigation ───────────────────────────────────────── */
.skip-nav {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--c-accent);
  color: #fff;
  border-radius: 0 0 var(--radius) var(--radius);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-nav:focus { top: 0; }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--c-heading);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 900; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.6rem); font-weight: 700; }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.2rem; }

p { font-size: 1rem; color: var(--c-text-muted); }

a {
  color: var(--c-accent-light);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: #fff; }
a:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ── Navigation ─────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
  transition: background 0.3s;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  padding-bottom: 0.875rem;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
}

.nav-brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--c-accent) 0%, #6366f1 100%);
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
}

.nav-brand-text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--c-heading);
  letter-spacing: -0.02em;
}

.nav-brand-text span { color: var(--c-accent-light); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.4rem 0.875rem;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--c-text-muted);
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--c-heading);
  background: var(--c-surface);
}

.nav-links a.active { font-weight: 700; }

.nav-cta {
  background: var(--c-accent) !important;
  color: #fff !important;
  font-weight: 700 !important;
  padding: 0.45rem 1.1rem !important;
}
.nav-cta:hover { background: var(--c-accent-light) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-border-strong);
  color: var(--c-text);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.25rem;
}

@media (max-width: 991px) {
  .nav-toggle { display: flex; align-items: center; }
  .nav-links-wrap {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-bg-2);
    border-bottom: 1px solid var(--c-border);
    padding: 1rem;
  }
  .nav-links-wrap.open { display: block; }
  .nav-links { flex-direction: column; align-items: flex-start; gap: 0.125rem; }
  .nav-links a { padding: 0.6rem 0.875rem; width: 100%; }
}

/* ── Hero Section ───────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 7vw, 6rem);
  background: var(--c-bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% -10%, rgba(59,130,246,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at -10% 80%, rgba(99,102,241,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,153,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,153,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.25);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--c-accent-light);
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-success);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.75); }
}

.hero h1 { margin-bottom: 1.25rem; letter-spacing: -0.03em; }
.hero h1 .accent { color: var(--c-accent-light); }
.hero h1 .underline-gold {
  position: relative;
  display: inline-block;
}
.hero h1 .underline-gold::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-accent));
  border-radius: 2px;
  opacity: 0.7;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--c-text-muted);
  max-width: 620px;
  margin-bottom: 2rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
}

.hero-stat .num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--c-heading);
  line-height: 1;
}
.hero-stat .num .accent { color: var(--c-accent-light); }
.hero-stat .label {
  font-size: 0.8rem;
  color: var(--c-text-faint);
  margin-top: 0.25rem;
}

.hero-visual {
  position: relative;
}

.hero-doc-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-doc-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), #6366f1, var(--c-gold));
}

.doc-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--c-border);
}

.doc-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--c-accent), #6366f1);
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  color: #fff;
  flex-shrink: 0;
}

.doc-meta { flex: 1; min-width: 0; }
.doc-meta strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--c-heading);
}
.doc-meta span { font-size: 0.75rem; color: var(--c-text-faint); }

.doc-badge {
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(16,185,129,0.15);
  color: var(--c-success);
  border: 1px solid rgba(16,185,129,0.25);
}

.doc-lines {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.doc-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.doc-line .key { color: var(--c-text-faint); }
.doc-line .val { color: var(--c-text); font-weight: 500; }

.doc-divider {
  height: 1px;
  background: var(--c-border);
  margin: 0.5rem 0;
}

.doc-total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-heading);
}

.doc-total .amount { color: var(--c-accent-light); font-size: 1rem; }

.doc-formats {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.format-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.format-chip.pdf { background: rgba(239,68,68,0.12); color: #f87171; border: 1px solid rgba(239,68,68,0.2); }
.format-chip.xml { background: rgba(59,130,246,0.12); color: var(--c-accent-light); border: 1px solid rgba(59,130,246,0.2); }
.format-chip.valid { background: rgba(16,185,129,0.12); color: var(--c-success); border: 1px solid rgba(16,185,129,0.2); }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn-primary-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: var(--c-accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary-brand:hover {
  background: var(--c-accent-light);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(59,130,246,0.35);
}
.btn-primary-brand:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

.btn-secondary-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: transparent;
  color: var(--c-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid var(--c-border-strong);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  text-decoration: none;
  white-space: nowrap;
}
.btn-secondary-brand:hover {
  background: var(--c-surface);
  border-color: var(--c-accent);
  color: var(--c-heading);
}

/* ── Section Utilities ──────────────────────────────────────── */
.section { padding: var(--section-pad) 0; }
.section-dark { background: var(--c-bg); }
.section-mid  { background: var(--c-bg-2); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.section-label::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--c-accent);
  border-radius: 1px;
}

.section-title { margin-bottom: 1rem; }
.section-lead {
  font-size: 1.1rem;
  color: var(--c-text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card-brand {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  height: 100%;
}
.card-brand:hover {
  border-color: var(--c-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}
.card-icon.blue  { background: rgba(59,130,246,0.12); color: var(--c-accent-light); }
.card-icon.gold  { background: rgba(245,158,11,0.12); color: var(--c-gold); }
.card-icon.green { background: rgba(16,185,129,0.12); color: var(--c-success); }
.card-icon.indigo { background: rgba(99,102,241,0.12); color: #a5b4fc; }

.card-brand h3, .card-brand h4 {
  margin-bottom: 0.625rem;
}
.card-brand p { font-size: 0.9rem; }

/* ── Timeline ────────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding: 0;
  list-style: none;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-accent), rgba(59,130,246,0.1));
}

.timeline-item {
  position: relative;
  padding-left: 56px;
  padding-bottom: 2.5rem;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: 10px;
  top: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--c-bg-2);
  border: 2px solid var(--c-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}
.timeline-dot.active {
  background: var(--c-accent);
  box-shadow: 0 0 12px var(--c-accent-glow);
}
.timeline-dot i { font-size: 0.6rem; color: #fff; }

.timeline-year {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--c-accent-light);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  padding: 0.1rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.timeline-item h4 { font-size: 1rem; margin-bottom: 0.375rem; }
.timeline-item p { font-size: 0.875rem; }

/* ── Advantages Grid ─────────────────────────────────────────── */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.advantage-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}
.advantage-item:hover { border-color: var(--c-border-strong); }

.adv-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  background: rgba(59,130,246,0.1);
  color: var(--c-accent-light);
}

.adv-body strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--c-heading);
  margin-bottom: 0.25rem;
}
.adv-body p { font-size: 0.8rem; margin: 0; }

/* ── Big Number Stats ────────────────────────────────────────── */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
}

.stat-block {
  background: var(--c-surface);
  padding: 2rem 1.5rem;
  text-align: center;
}

.stat-block .number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 900;
  color: var(--c-heading);
  line-height: 1;
  margin-bottom: 0.4rem;
}
.stat-block .number .highlight { color: var(--c-accent-light); }
.stat-block .stat-label { font-size: 0.8rem; color: var(--c-text-faint); }
.stat-block .stat-desc { font-size: 0.75rem; color: var(--c-text-faint); margin-top: 0.2rem; }

/* ── Profile Cards ───────────────────────────────────────────── */
.profile-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.profile-card:hover {
  border-color: var(--c-border-strong);
  transform: translateY(-2px);
}

.profile-card-header {
  padding: 1.5rem 1.5rem 1rem;
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.profile-card-header h3 { font-size: 1.1rem; margin: 0; }
.profile-level {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  white-space: nowrap;
}
.profile-level.basic { background: rgba(16,185,129,0.12); color: var(--c-success); border: 1px solid rgba(16,185,129,0.2); }
.profile-level.comfort { background: rgba(59,130,246,0.12); color: var(--c-accent-light); border: 1px solid rgba(59,130,246,0.2); }
.profile-level.extended { background: rgba(245,158,11,0.12); color: var(--c-gold); border: 1px solid rgba(245,158,11,0.2); }

.profile-card-body { padding: 1.25rem 1.5rem; }
.profile-card-body p { font-size: 0.875rem; margin-bottom: 1rem; }

.profile-features { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.profile-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--c-text-muted);
}
.profile-features li i { color: var(--c-success); font-size: 0.75rem; flex-shrink: 0; }

/* ── Comparison Table ────────────────────────────────────────── */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.compare-table th, .compare-table td {
  padding: 0.875rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--c-border);
}
.compare-table th {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--c-heading);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--c-surface-2);
}
.compare-table th:first-child { border-radius: var(--radius) 0 0 0; }
.compare-table th:last-child { border-radius: 0 var(--radius) 0 0; }
.compare-table td { color: var(--c-text-muted); }
.compare-table td:first-child { color: var(--c-text); font-weight: 500; }
.compare-table tr:hover td { background: rgba(99,153,255,0.04); }
.compare-table .check { color: var(--c-success); }
.compare-table .cross { color: var(--c-danger); }
.compare-table .neutral { color: var(--c-text-faint); }

/* ── Calculator Section ──────────────────────────────────────── */
.calc-box {
  background: var(--c-surface);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.calc-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.9rem;
}
.calc-row:last-child { border-bottom: none; }
.calc-row .label { color: var(--c-text-muted); }
.calc-row .amount { font-weight: 700; color: var(--c-heading); font-family: var(--font-display); }
.calc-row.total .label { font-size: 1rem; font-weight: 700; color: var(--c-heading); }
.calc-row.total .amount { font-size: 1.25rem; color: var(--c-accent-light); }

.form-brand label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.form-brand input,
.form-brand select {
  width: 100%;
  background: var(--c-bg-3);
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  color: var(--c-heading);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

.form-brand input:focus,
.form-brand select:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.form-brand input::placeholder { color: var(--c-text-faint); }
.form-brand select option { background: var(--c-bg-2); }

/* ── FAQ ─────────────────────────────────────────────────────── */
.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item.open { border-color: var(--c-border-strong); }

.faq-question {
  width: 100%;
  background: var(--c-surface);
  border: none;
  padding: 1.125rem 1.375rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  text-align: left;
  color: var(--c-heading);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  transition: background 0.2s;
}
.faq-question:hover { background: var(--c-surface-2); }
.faq-question i {
  color: var(--c-accent-light);
  transition: transform 0.25s;
  flex-shrink: 0;
}
.faq-item.open .faq-question i { transform: rotate(180deg); }

.faq-answer {
  display: none;
  padding: 0 1.375rem 1.125rem;
  background: var(--c-surface);
  color: var(--c-text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  border-top: 1px solid var(--c-border);
}
.faq-item.open .faq-answer { display: block; }

/* ── CTA Banner ──────────────────────────────────────────────── */
.cta-section {
  background: var(--c-bg-3);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 80% 50%, rgba(59,130,246,0.08) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Audience Cards (Für wen) ────────────────────────────────── */
.audience-card {
  position: relative;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.2s, transform 0.2s;
  overflow: hidden;
}

.audience-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}
.audience-card.business::before { background: linear-gradient(90deg, var(--c-accent), #6366f1); }
.audience-card.freelance::before { background: linear-gradient(90deg, var(--c-gold), #f472b6); }
.audience-card.tax::before { background: linear-gradient(90deg, var(--c-success), var(--c-accent)); }

.audience-card:hover { border-color: var(--c-border-strong); transform: translateY(-3px); }

.audience-card .audience-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.audience-card h3 { margin-bottom: 0.75rem; }
.audience-card p { font-size: 0.9rem; margin-bottom: 1.25rem; }

.audience-benefits { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; }
.audience-benefits li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.875rem;
  color: var(--c-text-muted);
}
.audience-benefits li i { color: var(--c-success); margin-top: 0.2rem; flex-shrink: 0; }

/* ── Tools Download Section ──────────────────────────────────── */
.tool-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: border-color 0.2s;
}
.tool-card:hover { border-color: var(--c-border-strong); }

.tool-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.tool-card-body { flex: 1; min-width: 0; }
.tool-card-body h4 { margin-bottom: 0.375rem; font-size: 1rem; }
.tool-card-body p { font-size: 0.85rem; margin-bottom: 1rem; }

.tag-list { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.tag {
  padding: 0.15rem 0.5rem;
  background: var(--c-bg-3);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--c-text-faint);
}

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--c-bg-2);
  border-top: 1px solid var(--c-border);
  padding: 4rem 0 2rem;
}

.footer-brand .nav-brand-text {
  font-size: 1.25rem;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--c-text-faint);
  max-width: 300px;
  line-height: 1.6;
  margin-top: 0.75rem;
}

.footer-col h5 {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  margin-bottom: 1rem;
}

.footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links a {
  font-size: 0.875rem;
  color: var(--c-text-faint);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--c-text); }

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--c-text-faint);
}

.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal a { color: var(--c-text-faint); }
.footer-legal a:hover { color: var(--c-text); }

/* ── Alert / Notice Boxes ────────────────────────────────────── */
.notice-box {
  display: flex;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
}
.notice-box.info {
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.2);
  color: var(--c-text-muted);
}
.notice-box.warning {
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.2);
  color: var(--c-text-muted);
}
.notice-box i { color: var(--c-accent-light); flex-shrink: 0; margin-top: 0.1rem; }
.notice-box.warning i { color: var(--c-gold); }

/* ── XML Preview ─────────────────────────────────────────────── */
.xml-preview {
  background: #0d1117;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.78rem;
  line-height: 1.7;
  color: #e2e8f0;
  overflow-x: auto;
  white-space: pre;
}
.xml-tag    { color: #79c0ff; }
.xml-attr   { color: #ff9f43; }
.xml-val    { color: #a5d6a7; }
.xml-comment { color: #6b7280; font-style: italic; }

/* ── Tabs ────────────────────────────────────────────────────── */
.brand-tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 2px solid var(--c-border);
  margin-bottom: 2rem;
  overflow-x: auto;
}

.brand-tab-btn {
  background: none;
  border: none;
  padding: 0.75rem 1.25rem;
  color: var(--c-text-muted);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.brand-tab-btn:hover { color: var(--c-text); }
.brand-tab-btn.active {
  color: var(--c-accent-light);
  border-bottom-color: var(--c-accent);
}

.brand-tab-panel { display: none; }
.brand-tab-panel.active { display: block; }

/* ── Progress / Steps ───────────────────────────────────────── */
.steps-list { list-style: none; counter-reset: steps; }
.step-item {
  counter-increment: steps;
  display: flex;
  gap: 1.25rem;
  padding-bottom: 2rem;
  position: relative;
}
.step-item:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 42px;
  bottom: 0;
  width: 2px;
  background: var(--c-border);
}
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--c-surface-2);
  border: 2px solid var(--c-border-strong);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.875rem;
  color: var(--c-accent-light);
  flex-shrink: 0;
}
.step-body h4 { font-size: 1rem; margin-bottom: 0.375rem; }
.step-body p { font-size: 0.875rem; }

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}
.fade-up.delay-1 { animation-delay: 0.1s; }
.fade-up.delay-2 { animation-delay: 0.2s; }
.fade-up.delay-3 { animation-delay: 0.3s; }
.fade-up.delay-4 { animation-delay: 0.4s; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero-stats { gap: 1.5rem; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
  .tool-card { flex-direction: column; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 576px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary-brand,
  .hero-actions .btn-secondary-brand { width: 100%; justify-content: center; }
  .stats-strip { grid-template-columns: 1fr; }
}

/* ── Utility Classes ─────────────────────────────────────────── */
.text-accent   { color: var(--c-accent-light) !important; }
.text-gold     { color: var(--c-gold) !important; }
.text-success  { color: var(--c-success) !important; }
.text-muted-brand { color: var(--c-text-muted) !important; }
.font-display  { font-family: var(--font-display) !important; }
.fw-800        { font-weight: 900 !important; }
.divider       { height: 1px; background: var(--c-border); margin: 2rem 0; }
.scrollbar-brand::-webkit-scrollbar { height: 4px; }
.scrollbar-brand::-webkit-scrollbar-track { background: var(--c-bg-3); }
.scrollbar-brand::-webkit-scrollbar-thumb { background: var(--c-accent); border-radius: 2px; }