:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --line: #e5e7eb;
  --text: #111827;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-soft: #dbeafe;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.seo-section {
  width: min(100%, 1100px);
  margin: 0 auto 32px;
  padding: 0 16px;
}

.seo-inner {
  background: transparent;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.seo-inner h2 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 1.1rem;
}

.seo-inner p {
  margin: 0;
  line-height: 1.7;
}

.seo-keywords {
  margin-top: 8px;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.app {
  width: min(100%, 1100px);
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.panel {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 18px;
}

.app-header {
  align-items: center;
}

.section-header h1,
.section-header h2,
.block h2,
.discount-zone-card h3,
.share-card h3,
.image-modal-header h3 {
  margin: 0;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.lang-switch {
  display: inline-flex;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-soft);
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
}

.lang-btn.active {
  background: #fff;
  color: var(--text);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.form-layout,
.block,
.preview-card,
.preview-section,
.preview-items,
.share-card,
.share-section,
.share-items {
  display: grid;
  gap: 14px;
}

.block {
  padding: 16px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.grid {
  display: grid;
  gap: 12px;
}

.single-grid {
  grid-template-columns: 1fr;
}

.two-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field,
.check-field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.95rem;
  font-weight: 600;
}

.check-field {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
}

.check-field input {
  width: 18px;
  height: 18px;
  margin: 0;
}

.check-field span {
  font-weight: 600;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 12px 14px;
  color: var(--text);
}

textarea {
  resize: vertical;
  min-height: 92px;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--primary-soft);
  border-color: var(--primary);
}

.items-header,
.action-bar,
.discount-zone-header,
.compact-item-row,
.total-row,
.share-card-header,
.share-section-head,
.image-modal-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.inline-header {
  align-items: flex-start;
}

.primary-btn,
.ghost-btn,
.secondary-btn,
.icon-btn {
  border: none;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 700;
}

.primary-btn {
  background: var(--primary);
  color: white;
}

.secondary-btn {
  background: var(--primary-soft);
  color: var(--primary);
}

.ghost-btn {
  background: var(--danger-soft);
  color: var(--danger);
}

.discount-zone-card {
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  display: grid;
  gap: 12px;
}

.preview-panel {
  position: sticky;
  top: 16px;
  align-self: start;
}

.action-bar {
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.action-feedback {
  min-height: 20px;
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.9rem;
}

.preview-card,
.share-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px;
}

.preview-top {
  display: grid;
  gap: 14px;
}

.card-label {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.preview-top h3,
.share-card h3 {
  font-size: 1.45rem;
}

.meta-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.meta-pair p,
.share-date {
  margin: 0;
}

.compact-list {
  gap: 8px;
}

.compact-item-row,
.share-line-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fff;
}

.compact-item-main,
.share-line-item {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.compact-item-name,
.share-line-name {
  font-weight: 700;
  line-height: 1.3;
}

.compact-item-text,
.share-line-text {
  color: var(--muted);
  line-height: 1.35;
  word-break: break-word;
}

.empty {
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: 14px;
  color: var(--muted);
  text-align: center;
}

.grand-total-row,
.split-row {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.grand-total-row {
  font-size: 1.08rem;
}

.note-text {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.6;
}

.disclaimer {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.capture-stage {
  position: fixed;
  left: -99999px;
  top: 0;
  width: 420px;
  opacity: 1;
  pointer-events: none;
  z-index: -1;
}

.share-card {
  width: 420px;
  min-height: 1px;
  box-shadow: none;
}

.share-card-simple {
  border-radius: 20px;
  padding: 16px;
  gap: 12px;
}

.share-items {
  gap: 8px;
}

.share-line-item {
  padding: 8px 10px;
}

.share-date {
  color: var(--muted);
  font-size: 0.92rem;
}

.share-brand {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
  letter-spacing: 0.04em;
}

.image-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.image-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.58);
}

.image-modal-dialog {
  position: relative;
  width: min(100%, 520px);
  max-height: 90vh;
  overflow: auto;
  background: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 16px;
}

.image-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.icon-btn {
  background: var(--panel-soft);
  color: var(--text);
  width: 40px;
  height: 40px;
  padding: 0;
  font-size: 1rem;
}

.image-modal-body {
  display: grid;
  gap: 12px;
}

.preview-image {
  width: 100%;
  display: block;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.image-modal-hint {
  margin: 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

.hidden {
  display: none;
}

@media (min-width: 900px) {
  .app {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    align-items: start;
  }
}

@media (max-width: 899px) {
  .preview-panel {
    position: static;
  }
}

@media (max-width: 640px) {
  .panel {
    padding: 14px;
  }

  .block {
    padding: 14px;
  }

  .section-header,
  .items-header,
  .discount-zone-header,
  .compact-item-row,
  .total-row,
  .share-section-head,
  .share-card-header,
  .action-bar,
  .image-modal-actions,
  .app-header {
    display: grid;
    grid-template-columns: 1fr;
  }

  .lang-switch {
    width: 100%;
    justify-content: stretch;
  }

  .lang-btn {
    flex: 1;
  }

  .two-grid,
  .meta-pair {
    grid-template-columns: 1fr;
  }

  .primary-btn,
  .ghost-btn,
  .secondary-btn {
    width: 100%;
  }
}