/* ========== DESIGN TOKENS ========== */
:root {
  --primary: #66BB6A;
  --primary-light: #A5D6A7;
  --primary-pale: #E8F5E9;
  --primary-bg: #F1F8E9;
  --accent: #2E7D32;
  --text-dark: #2D2D2D;
  --text-mid: #555;
  --text-light: #777;
  --text-muted: #999;
  --white: #FFFFFF;
  --bg-base: #FFFFFF;
  --bg-gray: #F8F8F8;
  --border: #E8E8E8;
  --border-light: #F0F0F0;
  --danger: #E74C3C;
  --success: #27AE60;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --max-w: 1080px;
  --header-h: 64px;
  --transition: 0.2s ease;
}

/* ========== RESET ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', sans-serif;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dark);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; height: auto; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ========== LAYOUT ========== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== HEADER ========== */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-logo img {
  height: 32px;
  width: auto;
  border-radius: 0;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-mid);
  transition: color var(--transition);
  white-space: nowrap;
}

.header-nav a:hover {
  color: var(--primary);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dark);
  margin: 5px 0;
  transition: var(--transition);
}

/* ========== HERO ========== */
.hero {
  background: linear-gradient(170deg, #F5FBF6 0%, #E8F5E9 40%, #C8E6C9 100%);
  padding: 64px 24px 72px;
  text-align: center;
}

.hero h1 {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 16px;
  color: var(--text-dark);
}

.hero h1 em {
  font-style: normal;
  color: var(--primary);
}

.hero p {
  font-size: 15px;
  color: var(--text-mid);
  max-width: 560px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: var(--white);
  font-size: 16px;
  font-weight: 700;
  padding: 14px 40px;
  border-radius: 50px;
  transition: background var(--transition), transform var(--transition);
}

.hero-cta:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

/* ========== FEATURES ========== */
.features {
  padding: 64px 24px;
  background: var(--bg-base);
}

.section-title {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 40px;
  color: var(--text-dark);
}

.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--primary);
  margin: 12px auto 0;
  border-radius: 2px;
}

.features-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius-lg);
  background: var(--primary-pale);
  border: 1px solid #D0E8D2;
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========== PRODUCT CARDS ========== */
.products-section {
  padding: 64px 24px;
  background: var(--bg-gray);
}

.products-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: contain;
  background: var(--primary-pale);
  padding: 24px;
}

.product-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card-body h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-card-body p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
  flex: 1;
}

.product-card-price {
  font-size: 14px;
  color: var(--text-mid);
  margin-bottom: 12px;
}

.product-card-price strong {
  font-size: 18px;
  color: var(--danger);
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-pale);
}

.btn-lg {
  padding: 14px 40px;
  font-size: 16px;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* ========== PRODUCT LIST PAGE ========== */
.page-header {
  background: var(--primary-pale);
  padding: 40px 24px;
  text-align: center;
  border-bottom: 1px solid #D0E8D2;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
}

.page-header p {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 8px;
}

.category-section {
  padding: 48px 24px;
}

.category-section:nth-child(even) {
  background: var(--bg-gray);
}

.category-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 24px;
}

.category-layout {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  align-items: start;
}

.category-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--primary-pale);
}

.category-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
  margin-top: 16px;
}

.sku-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.sku-grid--single {
  grid-template-columns: 1fr;
  max-width: 280px;
}

.sku-grid--double {
  grid-template-columns: repeat(2, 1fr);
}

.sku-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.sku-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.sku-face-value {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.sku-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.sku-price small {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
}

.sku-note {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* ========== PURCHASE PAGE ========== */
.purchase-page {
  padding: 48px 24px 80px;
  background: var(--bg-gray);
}

.purchase-container {
  max-width: 640px;
  margin: 0 auto;
}

.form-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.form-card h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-pale);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-dark);
}

.form-group label .required {
  color: var(--danger);
  font-size: 12px;
  margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102,187,106,0.1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.radio-group {
  display: flex;
  gap: 12px;
}

.radio-option {
  flex: 1;
  position: relative;
}

.radio-option input {
  position: absolute;
  opacity: 0;
}

.radio-option label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.radio-option input:checked + label {
  border-color: var(--primary);
  background: var(--primary-pale);
  color: var(--accent);
}

.order-summary {
  background: var(--primary-pale);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}

.order-summary-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 14px;
}

.order-summary-row.total {
  border-top: 1px solid #A5D6A7;
  margin-top: 8px;
  padding-top: 12px;
  font-size: 18px;
  font-weight: 700;
}

.order-summary-row.total .price {
  color: var(--danger);
}

/* ========== THANKS PAGE ========== */
.thanks-page {
  padding: 80px 24px 120px;
  text-align: center;
}

.thanks-icon {
  margin-bottom: 24px;
  line-height: 1;
}

.thanks-page h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.thanks-page p {
  font-size: 15px;
  color: var(--text-mid);
  max-width: 480px;
  margin: 0 auto 32px;
}

.thanks-box {
  background: var(--primary-pale);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 480px;
  margin: 0 auto 40px;
  text-align: left;
}

.thanks-box h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.thanks-box p {
  font-size: 14px;
  margin-bottom: 0;
  text-align: left;
}

/* ========== LEGAL / PRIVACY PAGES ========== */
.legal-page {
  padding: 48px 24px 80px;
}

.legal-container {
  max-width: 720px;
  margin: 0 auto;
}

.legal-container h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.legal-container h2:first-child {
  margin-top: 0;
}

.legal-container p,
.legal-container li {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.9;
}

.legal-container ul {
  padding-left: 24px;
  list-style: disc;
}

.legal-container li {
  margin-bottom: 4px;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.legal-table th,
.legal-table td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  font-size: 14px;
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  background: var(--bg-gray);
  font-weight: 600;
  width: 30%;
  white-space: nowrap;
}

.legal-table td {
  color: var(--text-mid);
}

/* ========== FOOTER ========== */
.site-footer {
  background: #2D2D2D;
  color: #CCC;
  padding: 48px 24px 24px;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-logo img {
  height: 28px;
  width: auto;
  border-radius: 0;
  filter: brightness(1.5);
}

.footer-brand p {
  font-size: 12px;
  color: #888;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.footer-links a {
  display: block;
  font-size: 13px;
  color: #AAA;
  padding: 3px 0;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--primary-light);
}

.footer-payment {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.footer-payment img {
  height: 24px;
  width: auto;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.footer-payment img:hover {
  opacity: 1;
}

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: 16px;
  text-align: center;
  font-size: 12px;
  color: #666;
}

/* ========== MOBILE ========== */
@media (max-width: 768px) {
  .header-nav { display: none; }
  .hamburger { display: block; }

  .header-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
  }

  .hero { padding: 40px 20px 48px; }
  .hero h1 { font-size: 22px; }

  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .products-grid { grid-template-columns: 1fr; }
  .category-layout { grid-template-columns: 1fr; }
  .category-image img { max-width: 320px; }
  .sku-grid { grid-template-columns: 1fr; gap: 12px; }
  .sku-grid--single { max-width: none; }
  .sku-grid--double { grid-template-columns: repeat(2, 1fr); }

  .form-row { grid-template-columns: 1fr; }
  .form-card { padding: 20px; }
  .radio-group { flex-direction: column; }

  .footer-inner { flex-direction: column; gap: 24px; }
}

@media (max-width: 480px) {
  .sku-grid { grid-template-columns: 1fr; }
}