/* ==========================================================================
   E-Rechnung Generator — restyled to follow the main taxzeit theme
   (Inter, rounded corners, soft shadows, the site's navy/amber palette)
   ========================================================================== */

.gen-app {
  --font-gen: var(--font-sans);
  --radius-card: var(--radius-md);
  --color-danger: #dc2626;
  --color-success: #16a34a;
  --font-weight-regular: 400;
  --font-weight-semibold: 600;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  padding-block: var(--space-6);
}

.gen-app * {
  box-sizing: border-box;
}

.gen-page-header {
  max-width: 46rem;
  margin: 0 auto var(--space-6);
  text-align: center;
}

.gen-page-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-heading);
  margin: 0 0 var(--space-2);
}

.gen-page-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

@media (min-width: 640px) {
  .gen-page-title {
    font-size: 2.4rem;
  }
}

.gen-grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 1024px) {
  .gen-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .gen-preview-column {
    position: sticky;
    top: 5.5rem;
  }
}

/* Inline embed inside a narrow article column: always stack, never split
   into two columns based on viewport width (the container is narrow
   regardless of viewport). */
.gen-app--embedded .gen-grid {
  grid-template-columns: 1fr;
}

.gen-app--embedded .gen-preview-column {
  position: static;
}

@media (max-width: 1023px) {
  .gen-preview-column {
    display: none;
  }

  body.gen-show-preview .gen-preview-column {
    display: block;
  }

  body.gen-show-preview .gen-form-column {
    display: none;
  }

  .gen-mobile-fab {
    display: flex;
  }
}

/* ---------- Banners ---------- */
.gen-banners {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.gen-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-sm);
}

.gen-banner--error {
  border-color: var(--color-danger);
  color: var(--color-danger);
  background: color-mix(in srgb, var(--color-danger) 8%, white);
}

.gen-banner--success {
  border-color: var(--color-success);
  color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 8%, white);
}

.gen-banner-close {
  border: none;
  background: transparent;
  color: inherit;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 var(--space-1);
}

/* ---------- Preview panel ---------- */
.gen-preview-column {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0;
  background: var(--color-bg-alt);
  display: flex;
  justify-content: center;
  overflow: hidden;
}

.gen-preview-page {
  width: 100%;
  max-width: none;
  min-width: 0;
  aspect-ratio: 210 / 297;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-5);
  overflow-y: auto;
  overflow-x: hidden;
  font-size: 0.82rem;
  line-height: 1.5;
}

.gen-preview-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.gen-preview-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-heading);
}

.gen-preview-muted {
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.gen-preview-company {
  text-align: right;
}

.gen-preview-company p,
.gen-preview-client p {
  margin: 0 0 2px;
}

.gen-preview-bold {
  font-weight: var(--font-weight-semibold);
}

.gen-preview-client {
  margin-bottom: var(--space-5);
}

.gen-preview-dates {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.gen-preview-date {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.gen-preview-label {
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.gen-preview-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-4);
}

.gen-preview-table th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--color-primary);
  border-bottom: none;
  padding: var(--space-2);
}

.gen-preview-table td {
  padding: var(--space-2) var(--space-1);
  border-bottom: 1px solid var(--color-border);
}

.gen-preview-td-desc {
  width: 40%;
}

.gen-preview-td-center {
  text-align: center;
}

.gen-preview-td-right {
  text-align: right;
}

.gen-preview-td-bold {
  font-weight: var(--font-weight-semibold);
}

.gen-totals {
  margin-left: auto;
  width: 240px;
  border-top: 1px solid var(--color-heading);
  padding-top: var(--space-2);
  margin-bottom: var(--space-5);
}

.gen-totals-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-1) 0;
}

.gen-totals-row--grand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-heading);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-2);
  padding-top: var(--space-2);
}

.gen-preview-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}

.gen-preview-box h4 {
  margin: 0 0 var(--space-1);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.gen-preview-box p {
  margin: 0;
}

.gen-preview-italic {
  font-style: italic;
  margin-top: var(--space-1) !important;
}

.gen-preview-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.gen-preview-footer p {
  margin: 0 0 2px;
}

.gen-preview-footer-right {
  text-align: right;
}

/* ---------- Form panel ---------- */
.gen-form-column {
  min-width: 0;
}

.gen-form-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.gen-form-header h2 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-heading);
}

.gen-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}

.gen-card h3 {
  margin: 0 0 var(--space-3);
  font-size: 0.95rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-heading);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.gen-field-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 560px) {
  .gen-field-grid {
    grid-template-columns: 1fr 1fr;
  }

  .gen-field--full {
    grid-column: 1 / -1;
  }
}

.gen-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.gen-field label {
  font-size: 0.8rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
}

.gen-field input,
.gen-field select,
.gen-field textarea {
  font: inherit;
  font-family: var(--font-gen);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.gen-field input:disabled {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
}

.gen-field input:focus-visible,
.gen-field select:focus-visible,
.gen-field textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent);
}

.gen-field-error {
  margin: 0;
  font-size: 0.75rem;
  color: var(--color-danger);
}

.gen-help {
  margin: var(--space-1) 0 0;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.gen-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.88rem;
  margin-top: var(--space-3);
  cursor: pointer;
}

.gen-checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
}

.gen-checkbox--right {
  justify-content: flex-end;
}

/* Line items */
.gen-item-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr auto;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.gen-item-row--header {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-heading);
}

.gen-item-cell input,
.gen-item-cell select {
  font: inherit;
  font-family: var(--font-gen);
  width: 100%;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.gen-item-cell--total {
  font-weight: var(--font-weight-semibold);
  text-align: right;
  padding-right: var(--space-2);
}

.gen-item-remove {
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: var(--space-1);
}

.gen-item-remove:hover {
  color: var(--color-danger);
}

@media (max-width: 700px) {
  .gen-item-row {
    grid-template-columns: 1fr 1fr;
  }

  .gen-item-row--header {
    display: none;
  }

  .gen-item-cell--desc {
    grid-column: 1 / -1;
  }
}

/* Collapsible notes section */
.gen-collapse-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  padding: 0;
  font: inherit;
  font-family: var(--font-gen);
  font-size: 0.95rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-heading);
  cursor: pointer;
}

.gen-collapse-arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

.gen-collapse-arrow.is-open {
  transform: rotate(180deg);
}

.gen-collapse-body {
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Buttons */
.gen-btn {
  font: inherit;
  font-family: var(--font-gen);
  font-weight: var(--font-weight-semibold);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  cursor: pointer;
  background: var(--color-primary);
  color: #fff;
  transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.gen-btn:hover:not(:disabled) {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.gen-btn--ghost {
  background: transparent;
  color: var(--color-primary);
}

.gen-btn--ghost:hover:not(:disabled) {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.gen-btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.gen-btn--primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}

.gen-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.gen-submit {
  position: sticky;
  bottom: var(--space-3);
  display: flex;
  gap: var(--space-2);
  width: 100%;
  margin-top: var(--space-2);
}

.gen-submit .gen-btn {
  flex: 1;
  box-shadow: var(--shadow-lg);
}

.gen-submit .gen-btn--ghost {
  background: var(--color-bg);
  box-shadow: var(--shadow-md);
}

.gen-print-disclaimer {
  font-size: 0.76rem;
  color: var(--color-text-muted);
  margin: var(--space-3) 0;
}

/* Mobile floating action button */
.gen-mobile-fab {
  display: none;
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  z-index: 40;
  align-items: center;
  gap: var(--space-2);
  border-radius: 999px;
  border: none;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  font: inherit;
  font-family: var(--font-gen);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
}

/* ---------- Print ---------- */
@media print {
  body.gen-printing .site-header,
  body.gen-printing .site-footer,
  body.gen-printing .gen-intro,
  body.gen-printing .gen-page-header,
  body.gen-printing .gen-form-column,
  body.gen-printing .gen-mobile-fab,
  body.gen-printing .gen-banners,
  body.gen-printing .gen-explainer,
  body.gen-printing .faq,
  body.gen-printing .related,
  body.gen-printing .breadcrumbs {
    display: none !important;
  }

  body.gen-printing .gen-preview-column {
    display: flex !important;
    border: none;
    box-shadow: none;
    padding: 0;
  }

  body.gen-printing .gen-preview-page {
    max-width: none;
    width: 100%;
    border: none;
    box-shadow: none;
    aspect-ratio: auto;
  }
}