:root {
  --bg-color: #fef9ef;
  --text-color: #4a3728;
  --primary-color: #c4925e;
  --primary-hover-color: #b07a4a;
  --secondary-color: #8b6f50;
  --border-color: #e8ddd0;
  --card-bg-color: #ffffff;
  --shadow-color: rgba(180, 130, 80, 0.08);
  --label-color: #8b6f50;
  --accent-color: #d4a373;
  --font-family: "Noto Sans JP", "Yu Gothic", "游ゴシック", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  --border-radius: 10px;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 16px;
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

header h1 {
  font-size: 2rem;
  color: var(--primary-color);
  margin: 0;
  font-weight: 700;
  letter-spacing: 3px;
}

.main-layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 24px;
  align-items: start;
}

.form-section, .preview-section {
  background-color: var(--card-bg-color);
  border-radius: var(--border-radius);
  padding: 20px 24px;
  box-shadow: 0 2px 16px var(--shadow-color);
}

h2 {
  font-size: 1.15rem;
  margin-top: 0;
  margin-bottom: 18px;
  color: var(--text-color);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 10px;
  letter-spacing: 1px;
}

.form-group {
  margin-bottom: 14px;
}

#dateNumeralGroup {
  margin-top: -8px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--label-color);
  font-size: 0.78rem;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
  background-color: #fff;
  color: var(--text-color);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(196, 146, 94, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 65px;
}

.template-sets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tpl-group-label {
  width: 100%;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin: 8px 0 4px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-color);
}

.tpl-set {
  background-color: #faf5ee;
  color: var(--secondary-color);
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 16px;
  font-size: 0.8rem;
  transition: all 0.2s;
}

.tpl-set:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: translateY(-1px);
}

.tpl-set-child {
  background-color: #f0f3ef;
}

.form-fieldset {
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 14px;
  margin-top: 14px;
}

.form-fieldset legend {
  font-weight: 600;
  padding: 0 10px;
  margin-left: 5px;
  color: var(--primary-color);
  font-size: 0.88rem;
}

.form-row {
  display: flex;
  gap: 12px;
}

.stamp-control {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: #faf5ee;
  padding: 8px 12px;
  border-radius: 8px;
}

.stamp-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-weight: normal !important;
  font-size: 0.92rem !important;
  color: var(--text-color) !important;
}

.stamp-selector {
  flex-grow: 1;
}

.stamp-control input[type="checkbox"] {
  margin-right: 6px;
  width: 1.1em;
  height: 1.1em;
  accent-color: var(--primary-color);
}

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

.form-actions {
  margin-top: 22px;
  display: flex;
  gap: 8px;
}

.btn {
  flex: 1;
  padding: 11px;
  border: none;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover-color);
  box-shadow: 0 3px 12px rgba(196, 146, 94, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: #faf5ee;
  color: var(--secondary-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: #f0e8dc;
  transform: translateY(-1px);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.preview-toolbar h2 {
  margin: 0;
  padding: 0;
  border: none;
}

.paper-size-label {
  background-color: #faf5ee;
  color: var(--secondary-color);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.82rem;
  display: inline-block;
}

.certificate-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #f5f0e8;
  padding: 20px;
  border-radius: 8px;
  overflow: auto;
}

.certificate {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1 / 1.414;
  padding: 16px;
  position: relative;
}

.cert-bg {
  position: absolute;
  top: 16px;
  left: 16px;
  right: 16px;
  bottom: 16px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: 4px;
  z-index: 0;
  pointer-events: none;
  transition: all 0.3s ease;
}

.cert-border {
  width: 100%;
  height: 100%;
  padding: 12px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

.cert-inner {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  gap: 5px;
  position: relative;
  z-index: 2;
}

.border-classic .cert-border {
  border: 4px double var(--primary-color);
  background: rgba(255, 253, 250, 0.95);
}
.border-classic .cert-inner {
  border: 2px solid #e0d0c0;
}

.border-golden .cert-border {
  border: 5px solid #c9a84c;
  background: linear-gradient(135deg, rgba(255,248,231,0.95) 0%, rgba(250,240,220,0.95) 100%);
  box-shadow: inset 0 0 20px rgba(201,168,76,0.15);
}
.border-golden .cert-inner {
  border: 2px solid #e6c47c;
}

.border-modern .cert-border {
  border: 3px solid var(--primary-color);
  background: rgba(255,255,255,0.95);
  box-shadow: 0 0 0 5px #f0e8dc, 0 0 0 7px #e0d0c0;
}
.border-modern .cert-inner {
  border: none;
}

.border-elegant .cert-border {
  border: 2px solid #b8a898;
  background: linear-gradient(135deg, rgba(253,252,251,0.95) 0%, rgba(245,242,238,0.95) 100%);
  box-shadow: 0 0 24px rgba(184,168,152,0.12);
}
.border-elegant .cert-inner {
  border: 1px dashed #b8a898;
}

.border-formal .cert-border {
  border: 3px solid #9a9090;
  background: rgba(250, 248, 248, 0.97);
  box-shadow: inset 0 0 30px rgba(70,60,60,0.05);
}
.border-formal .cert-inner {
  border: 1px solid #b0a8a8;
}

.border-cute .cert-border {
  border: 4px dotted #e0b8b0;
  background: rgba(255,249,247,0.95);
  border-radius: 20px;
}
.border-cute .cert-inner {
  border: 2px solid #e8d0c8;
  border-radius: 12px;
}

.border-nature .cert-border {
  border: 4px solid #8aa878;
  background: rgba(248,252,244,0.95);
  box-shadow: inset 0 0 20px rgba(138,168,120,0.1);
}
.border-nature .cert-inner {
  border: 2px solid #aac898;
}

.paper-portrait .certificate {
  aspect-ratio: 1 / 1.414;
}
.paper-landscape .certificate {
  aspect-ratio: 1.414 / 1;
}

.layout-horizontal {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  height: 100%;
  gap: 5px;
}

.cert-title {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 5px;
  color: var(--primary-color);
  margin-bottom: 8px;
  font-family: "Yu Mincho", "游明朝", "Hiragino Mincho ProN", "MS Mincho", serif;
}

.cert-recipient {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-color);
  margin: 4px 0;
  letter-spacing: 3px;
}

.cert-award-label {
  font-size: 0.82rem;
  color: var(--label-color);
  letter-spacing: 2px;
}

.cert-award-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 3px;
  padding: 2px 12px;
  border-bottom: 1.5px solid var(--accent-color);
  display: inline-block;
}

.cert-reason {
  font-size: 0.78rem;
  color: #7a6a5a;
  line-height: 1.5;
  max-width: 88%;
  margin: 4px 0;
}

.cert-date {
  font-size: 0.78rem;
  color: var(--label-color);
  margin-top: 4px;
}

.cert-issuer {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.cert-issuer-title {
  font-size: 0.78rem;
  color: var(--label-color);
}

.cert-issuer-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-color);
  letter-spacing: 2px;
}

.cert-stamp {
  font-size: 1.6rem;
  color: #b84848;
  opacity: 0.7;
  margin-top: 4px;
  transition: opacity 0.2s;
}

.cert-stamp.hidden {
  opacity: 0;
}

.layout-vertical {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  gap: 5px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.vert-title {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 3px;
  color: var(--primary-color);
  font-family: "Yu Mincho", "游明朝", "Hiragino Mincho ProN", "MS Mincho", serif;
  margin-bottom: 6px;
}

.vert-body {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 2px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.vert-recipient {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: 3px;
  text-orientation: upright;
}

.vert-text {
  font-size: 0.88rem;
  color: var(--label-color);
  letter-spacing: 1px;
}

.vert-award-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 2px;
  padding: 0 6px;
  text-orientation: upright;
  border-right: 1.5px solid var(--accent-color);
}

.vert-reason {
  font-size: 0.78rem;
  color: #7a6a5a;
  line-height: 1.6;
  margin: 4px 0;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  flex-shrink: 1;
  overflow: hidden;
}

.vert-footer {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 8px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.vert-date {
  font-size: 0.78rem;
  color: var(--label-color);
  text-orientation: upright;
}

.vert-issuer {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 4px;
}

.vert-issuer-title {
  font-size: 0.78rem;
  color: var(--label-color);
  text-orientation: upright;
}

.vert-issuer-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-color);
  letter-spacing: 1px;
  text-orientation: upright;
}

.vert-stamp {
  font-size: 1.4rem;
  color: #b84848;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.vert-stamp.hidden {
  opacity: 0;
}

@media print {
  body {
    background: #fff !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  header,
  .form-section,
  .preview-toolbar,
  .form-actions {
    display: none !important;
  }
  .main-layout {
    display: block !important;
    grid-template-columns: none !important;
    gap: 0 !important;
  }
  .preview-section {
    box-shadow: none !important;
    padding: 0 !important;
    background: none !important;
    border: none !important;
    margin: 0 !important;
    width: 100% !important;
    height: 100vh !important;
    page-break-after: avoid !important;
    page-break-inside: avoid !important;
  }
  .certificate-wrapper {
    padding: 0 !important;
    background: none !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    height: 100% !important;
    min-height: 0 !important;
    overflow: hidden !important;
  }
  .certificate {
    max-width: 100% !important;
    width: 100% !important;
    height: 100% !important;
    padding: 0 !important;
    aspect-ratio: auto !important;
    box-sizing: border-box !important;
    flex: none !important;
  }
  .cert-bg,
  .cert-border,
  .cert-inner {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }
  @page {
    margin: 0;
    size: A4 portrait;
  }
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 20px;
  color: var(--label-color);
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.site-footer a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

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

@media (max-width: 1200px) {
  .main-layout {
    grid-template-columns: 340px 1fr;
  }
}

@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  .preview-section {
    margin-top: 20px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 12px;
  }
  header h1 {
    font-size: 1.5rem;
  }
  .form-section, .preview-section {
    padding: 16px;
  }
  .form-row {
    flex-direction: column;
    gap: 0;
  }
  .form-actions {
    flex-direction: column;
  }
  .cert-title {
    font-size: 1.4rem;
    letter-spacing: 3px;
  }
  .cert-recipient {
    font-size: 1.15rem;
  }
  .cert-award-title {
    font-size: 1.05rem;
  }
  .vert-title {
    font-size: 1.3rem;
  }
  .vert-recipient {
    font-size: 1.05rem;
  }
  .vert-award-title {
    font-size: 0.95rem;
  }
  .certificate {
    max-width: 100%;
    padding: 8px;
  }
  .certificate-wrapper {
    min-height: 0;
  }
}