:root {
  --bg: #eef2f6;
  --surface: #ffffff;
  --ink: #15202b;
  --muted: #3d4f61;
  --line: #d5dee8;
  --primary: #0f4c81;
  --primary-hover: #0c3d68;
  --accent: #0f6b4c;
  --danger: #9b1c1c;
  --danger-bg: #fdecec;
  --ok: #0f6b4c;
  --ok-bg: #e7f6ef;
  --focus: #0f4c81;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(21, 32, 43, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--primary);
  color: #fff;
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  z-index: 10;
}

.skip-link:focus {
  top: 0.75rem;
}

.skip-link:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 2px;
}

.wrap {
  width: min(1080px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  background: linear-gradient(160deg, #0f4c81 0%, #1565a8 55%, #0f6b4c 140%);
  color: #fff;
  padding: 2.4rem 0 2.1rem;
}

.brand {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.tagline {
  margin: 0.55rem 0 0;
  max-width: 38rem;
  font-size: 1.12rem;
  color: #e7f0f8;
}

.generator-section {
  margin-top: -1.2rem;
  padding-bottom: 1rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}

.generator-form {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1rem 1.5rem;
  min-width: 0;
}

.generator-form > .field,
.generator-form > .actions,
.generator-form > .options {
  grid-column: 1;
}

.preview-column {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
  grid-column: 2;
  grid-row: 1 / span 4;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

label,
legend {
  font-weight: 650;
  color: var(--ink);
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

input[type="text"],
select {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid #b7c4d3;
  border-radius: 10px;
  font: inherit;
  font-size: 1.05rem;
  background: #fff;
  color: var(--ink);
}

input[type="text"]:focus,
select:focus,
input[type="range"]:focus-visible,
input[type="color"]:focus-visible,
input[type="checkbox"]:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

input[type="text"][aria-invalid="true"] {
  border-color: var(--danger);
  box-shadow: 0 0 0 1px var(--danger);
}

input[type="range"] {
  width: 100%;
  min-height: 2.75rem;
  margin: 0;
}

input[type="color"] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.2rem;
  border: 1px solid #b7c4d3;
  border-radius: 8px;
  background: #fff;
}

.checkbox-field {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.6rem;
}

.checkbox-field input {
  width: 1.35rem;
  height: 1.35rem;
}

.actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 10px;
  min-height: 2.85rem;
  padding: 0.65rem 1rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-secondary {
  background: #e8eef5;
  color: var(--ink);
}

.btn-secondary:hover:not(:disabled) {
  background: #d9e3ee;
}

.options {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem 1rem;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem 1rem;
}

.preview-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  padding: 1rem;
  border: 1px dashed #b7c4d3;
  border-radius: 12px;
  background: repeating-conic-gradient(#f7f9fb 0% 25%, #fff 0% 50%) 50% / 20px 20px;
  overflow: auto;
}

#barcode-svg {
  max-width: 100%;
  height: auto;
}

.status {
  min-height: 1.4rem;
  font-size: 0.98rem;
}

.status.error {
  color: var(--danger);
  background: var(--danger-bg);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
}

.status.ok {
  color: var(--ok);
  background: var(--ok-bg);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
}

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

.content {
  padding: 1.5rem 0 3rem;
  display: grid;
  gap: 1.8rem;
}

.content article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem 1.3rem;
}

.content h2 {
  margin: 0 0 0.7rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.content p,
.content li,
.content dd {
  color: var(--muted);
}

.content ul,
.content ol {
  padding-left: 1.2rem;
}

.type-list {
  display: grid;
  gap: 0.7rem;
}

.faq dt {
  font-weight: 700;
  margin-top: 0.9rem;
}

.faq dt:first-child {
  margin-top: 0;
}

.faq dd {
  margin: 0.25rem 0 0;
}

.site-footer {
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer a {
  color: inherit;
  text-underline-offset: 0.18em;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 860px) {
  .generator-form,
  .options-grid {
    grid-template-columns: 1fr;
  }

  .preview-column {
    grid-column: 1;
    grid-row: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  @page {
    margin: 12mm;
  }

  .skip-link,
  .site-header,
  .generator-form > .field,
  .generator-form > .actions,
  .generator-form > .options,
  .download-actions,
  .preview-note,
  .status,
  .content,
  .site-footer {
    display: none !important;
  }

  body {
    background: #fff;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  .generator-section,
  .panel,
  .generator-form,
  .preview-column,
  .preview-frame,
  .wrap {
    display: block;
    width: auto;
    margin: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: #fff;
  }

  .preview-frame {
    min-height: 0;
  }

  #barcode-svg {
    max-width: none;
  }
}