/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: #F4F4F4;
  color: #111111;
  font-size: 14px;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.hidden { display: none !important; }

.container {
  max-width: 672px;
  margin: 0 auto;
}

/* ===== Header ===== */
.site-header {
  background: #111111;
  color: white;
  padding: 16px;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.back-link {
  color: white;
  font-size: 14px;
  font-weight: 500;
  opacity: 0.7;
  transition: opacity 0.15s;
}
.back-link:hover { opacity: 1; }

.header-badge {
  font-size: 10px;
  opacity: 0.4;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* ===== Hero ===== */
.hero {
  background: white;
  border-bottom: 1px solid #E5E7EB;
  padding: 20px 16px 16px;
}

.hero .container { padding: 0; }

.hero-eyebrow {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #9CA3AF;
  margin-bottom: 8px;
}

.hero h1 {
  font-size: 20px;
  font-weight: 700;
  color: #111827;
  letter-spacing: -0.025em;
  margin-bottom: 4px;
}

.hero p {
  font-size: 12px;
  color: #9CA3AF;
}

/* ===== Main ===== */
main {
  max-width: 672px;
  margin: 0 auto;
  padding: 0 12px 32px;
}

/* ===== Privacy badge ===== */
.privacy-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 11px;
  color: #9CA3AF;
  margin: 12px 0;
}

.privacy-badge svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ===== Main card ===== */
.main-card {
  background: white;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  margin-bottom: 16px;
}

/* ===== Tab navigation ===== */
.tab-nav {
  display: flex;
  overflow-x: auto;
  gap: 4px;
  padding: 8px;
  border-bottom: 1px solid #E5E7EB;
  scrollbar-width: none;
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.15s, color 0.15s;
  white-space: nowrap;
  background: transparent;
  color: #9CA3AF;
}

.tab-btn:hover { color: #374151; }

.tab-btn.tab-active {
  background: #111111;
  color: white;
}

/* ===== Result banner ===== */
.result-banner {
  padding: 12px 16px;
  background: #111111;
  border-bottom: 1px solid #E5E7EB;
}

.result-label {
  font-size: 10px;
  color: #6B7280;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.result-text {
  font-size: 16px;
  font-weight: 700;
  color: white;
  line-height: 1.375;
}

/* ===== Search box ===== */
.search-wrap {
  position: sticky;
  top: 0;
  z-index: 20;
  background: white;
  padding: 8px 12px;
  border-bottom: 1px solid #E5E7EB;
}

.search-input {
  width: 100%;
  font-size: 14px;
  font-family: inherit;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #E5E7EB;
  background: #F9FAFB;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}

.search-input:focus {
  border-color: #9CA3AF;
  background: white;
}

/* ===== Table ===== */
.table-wrap { overflow-x: auto; }

.size-table {
  width: 100%;
  font-size: 14px;
  table-layout: fixed;
  border-collapse: collapse;
}

.size-table th {
  padding: 10px 8px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: #111111;
  color: white;
  position: sticky;
  top: 3.25rem;
  z-index: 10;
}

.size-table tbody tr {
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 0.1s, transform 0.08s;
  position: relative;
}

.size-table tbody tr.even-row { background: #F7F7F7; }
.size-table tbody tr:hover { background: #F0F0F0; }
.size-table tbody tr:active {
  transform: scale(0.99);
  background: #E5E5E5 !important;
}

.size-table tbody tr::after {
  content: '›';
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: #111;
  opacity: 0.15;
  font-size: 20px;
  line-height: 1;
  pointer-events: none;
}

.size-table tbody tr.selected-row {
  background: #EBEBEB !important;
  border-left: 3px solid #111111;
}

.size-table tbody tr.selected-row::after { opacity: 0.5; }

.size-table td {
  padding: 14px 8px;
  font-size: 14px;
  text-align: center;
}

/* ===== Bra cup section ===== */
.bra-cup-section {
  border-bottom: 1px solid #E5E7EB;
  padding: 12px;
}

.bra-cup-label {
  font-size: 11px;
  font-weight: 600;
  color: #9CA3AF;
  margin-bottom: 8px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.cup-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.cup-btn {
  padding: 8px 0;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid #E5E7EB;
  color: #4B5563;
  background: white;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
  font-family: inherit;
}

.cup-btn.cup-active {
  background: #111111;
  color: white;
  border-color: #111111;
}

/* ===== Bra note ===== */
.bra-note {
  font-size: 12px;
  color: #6B7280;
  background: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 16px;
}

.bra-note strong { color: #374151; }

/* ===== Section card ===== */
.section-card {
  background: white;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.section-heading {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #9CA3AF;
  margin-bottom: 16px;
  border-left: 2px solid #111827;
  padding-left: 12px;
}

/* ===== How to measure ===== */
.measure-list { display: flex; flex-direction: column; gap: 16px; }

.measure-item h3 {
  font-size: 13px;
  font-weight: 600;
  color: #1F2937;
  margin-bottom: 4px;
}

.measure-item p {
  font-size: 14px;
  color: #4B5563;
  line-height: 1.625;
}

/* ===== FAQ ===== */
.faq-list { display: flex; flex-direction: column; gap: 8px; }

details.faq-item {
  border: 1px solid #F3F4F6;
  border-radius: 8px;
  overflow: hidden;
}

details.faq-item summary {
  padding: 12px 16px;
  font-weight: 600;
  font-size: 14px;
  color: #374151;
  background: #F9FAFB;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
}
details.faq-item summary::-webkit-details-marker { display: none; }

.faq-toggle {
  color: #D1D5DB;
  font-size: 16px;
  line-height: 1;
  margin-left: 12px;
  flex-shrink: 0;
}

.faq-answer {
  padding: 12px 16px;
  font-size: 14px;
  color: #6B7280;
  line-height: 1.625;
}

/* ===== About section ===== */
details.about-card {
  background: white;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
}

details.about-card summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 14px;
  color: #4B5563;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
}
details.about-card summary::-webkit-details-marker { display: none; }

.about-toggle { color: #D1D5DB; font-size: 14px; }

.about-body {
  padding: 0 20px 20px;
  font-size: 14px;
  color: #6B7280;
  line-height: 1.625;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.about-body strong { color: #374151; }

/* ===== Related tools ===== */
.related-section { margin-bottom: 16px; }

.related-heading {
  font-size: 11px;
  font-weight: 600;
  color: #9CA3AF;
  margin-bottom: 12px;
  padding: 0 4px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.related-link {
  background: white;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  transition: border-color 0.15s;
  display: block;
}

.related-link:hover { border-color: #9CA3AF; }

.related-icon { font-size: 24px; margin-bottom: 4px; }

.related-label {
  font-size: 12px;
  font-weight: 600;
  color: #4B5563;
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 24px 16px;
  font-size: 12px;
  color: #9CA3AF;
  border-top: 1px solid #E5E7EB;
  background: white;
}

.site-footer p {
  margin-bottom: 12px;
  letter-spacing: 0.15em;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  column-gap: 16px;
  row-gap: 4px;
}

.footer-nav a { transition: color 0.15s; }
.footer-nav a:hover { color: #374151; }
.footer-nav a.current {
  font-weight: 600;
  color: #4B5563;
}