:root {
  --bg: #f4f4f4;
  --card: #fff;
  --text: #333;
  --muted: #707070;
  --border: #ddd;
  --accent: #e5322d;
  --accent-hover: #c92824;
  --radius: 10px;
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  --font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  min-height: 100vh;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.site-header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent-hover);
}

.page-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page-wrap--wide {
  max-width: 900px;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 600;
  text-align: center;
  margin: 0 0 0.5rem;
  color: #222;
}

.page-lead {
  text-align: center;
  color: var(--muted);
  margin: 0 0 1.75rem;
  font-size: 1rem;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: #222;
}

.hint {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0.35rem 0 0;
}

.error,
.errorlist {
  color: var(--accent);
  font-size: 0.875rem;
}

.upload-zone {
  display: block;
  border: 2px dashed #c8c8c8;
  border-radius: var(--radius);
  background: #fafafa;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: #fff8f8;
}

.upload-zone input[type="file"] {
  display: block;
  width: 100%;
  max-width: 16rem;
  margin: 0.75rem auto 0;
  font-size: 0.9rem;
}

.upload-zone-label {
  font-size: 1.05rem;
  font-weight: 600;
  color: #222;
  display: block;
}

.upload-zone-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.form-row {
  margin-bottom: 1rem;
}

.form-row:last-child {
  margin-bottom: 0;
}

.form-row label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.35rem;
  color: #444;
}

.form-row select,
.form-row input[type="number"] {
  width: 100%;
  max-width: 20rem;
  font: inherit;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
}

.form-row input[type="number"] {
  max-width: 6rem;
}

.form-row--check label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-weight: 500;
  max-width: 28rem;
  cursor: pointer;
}

.form-row--check input[type="checkbox"] {
  margin-top: 0.2rem;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.form-row--check .hint {
  margin-left: 1.5rem;
}

.form-actions {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.btn {
  font: inherit;
  font-weight: 600;
  padding: 0.65rem 1.5rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  line-height: 1.2;
}

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

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

.btn-secondary {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: #bbb;
  background: #fafafa;
}

.meta-line {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 1rem;
}

.assembly-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 8px;
  margin-top: 0.5rem;
}

.assembly-corner {
  width: 1.75rem;
}

.assembly-cols {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: 4px;
  text-align: center;
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 600;
}

.assembly-row-label {
  text-align: right;
  padding-right: 6px;
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 600;
}

.assembly-row {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), 1fr);
  gap: 2px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--border);
}

.assembly-cell {
  margin: 0;
  background: var(--card);
}

.assembly-cell img {
  display: block;
  width: 100%;
  height: auto;
}

.assembly-cell figcaption {
  padding: 4px 6px;
  font-size: 0.7rem;
  text-align: center;
  background: #fafafa;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.page-num {
  font-weight: 700;
  color: var(--text);
}

.cell-pos::before {
  content: " · ";
}

.download-bar {
  text-align: center;
  padding-top: 0.5rem;
}

.error-banner {
  background: #fff5f5;
  border: 1px solid #f5c2c0;
  color: var(--accent);
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

#preview-results.is-loading {
  opacity: 0.55;
  pointer-events: none;
}

.site-footer {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.cookie-banner {
  position: sticky;
  bottom: 0;
  z-index: 20;
  margin: 0 auto;
  max-width: 960px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.85rem 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  justify-content: space-between;
}

.cookie-banner[hidden],
.cookie-banner.cookie-banner--dismissed {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.cookie-banner p {
  margin: 0;
  color: #444;
  font-size: 0.88rem;
}

.cookie-banner-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.cookie-banner a {
  color: var(--accent);
  text-decoration: underline;
}

.legal-card p,
.legal-card li {
  margin: 0 0 0.75rem;
}

.legal-card p:last-child,
.legal-card li:last-child {
  margin-bottom: 0;
}

.legal-list {
  margin: 0;
  padding-left: 1.25rem;
}

.legal-card code {
  font-size: 0.9em;
  background: #f5f5f5;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

.legal-back {
  text-align: center;
  margin-top: 0.5rem;
}

.legal-back a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.legal-back a:hover {
  text-decoration: underline;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
  margin-left: 0.5rem;
}

.site-footer a:hover {
  text-decoration: underline;
}