/* =========================================
   新NISA取崩しシミュレーター — スタイル
   ========================================= */

:root {
  --primary: #0f766e;
  --primary-hover: #0d6b63;
  --primary-light: #ccfbf1;
  --primary-rgb: 15, 118, 110;
  --accent: #0d9488;
  --accent-dark: #134e4a;
  --bg: #f9f7f4;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --text-weak: #9ca3af;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.10), 0 1px 4px rgba(0,0,0,0.06);
  --transition: 0.15s ease;
}

/* =========================================
   リセット・ベース
   ========================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'BIZ UDPGothic', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  word-break: break-word;
}

/* =========================================
   ヘッダー
   ========================================= */
header {
  background: linear-gradient(135deg, #134e4a 0%, #0f766e 60%, #0d9488 100%);
  color: #fff;
  padding: 1.75rem 1.25rem 1.5rem;
  text-align: center;
}

.header-inner {
  max-width: 700px;
  margin: 0 auto;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 100px;
  padding: 0.2rem 0.75rem;
  font-size: 0.8125rem;
  font-family: 'Outfit', sans-serif;
  margin-bottom: 0.6rem;
  letter-spacing: 0.02em;
}

header h1 {
  font-family: 'Outfit', 'BIZ UDPGothic', sans-serif;
  font-size: clamp(1.3rem, 4vw, 1.85rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.header-sub {
  font-size: 0.85em;
  font-weight: 400;
  opacity: 0.85;
}

.subtitle {
  font-size: 0.9rem;
  opacity: 0.88;
  margin-top: 0.4rem;
}

/* =========================================
   メインレイアウト
   ========================================= */
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.25rem 1rem;
}

@media (min-width: 640px) {
  main {
    padding: 1.75rem 1.5rem;
  }
}

/* =========================================
   カード共通
   ========================================= */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0,0,0,0.05);
  margin-bottom: 1.25rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

@media (min-width: 640px) {
  .card {
    padding: 1.75rem;
  }
}

.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* =========================================
   広告ユニット
   ========================================= */
.ad-unit {
  min-height: 90px;
  background: #f0f4f8;
  border: 1.5px dashed #c8d5e0;
  border-radius: var(--radius-sm);
  margin: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* =========================================
   タブUI
   ========================================= */
.tab-group {
  display: flex;
  gap: 0.5rem;
  background: #f1f5f9;
  border-radius: var(--radius-sm);
  padding: 0.25rem;
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.625rem 1rem;
  min-height: 44px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-family: 'BIZ UDPGothic', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  background: rgba(255,255,255,0.7);
  color: var(--primary);
}

.tab-btn.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.10);
}

.tab-btn:active {
  transform: scale(0.98);
}

/* =========================================
   フォーム
   ========================================= */
.tab-panel {
  display: block;
}

.tab-panel[hidden] {
  display: none;
}

.form-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 500px) {
  .form-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: #374151;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrap input {
  width: 100%;
  padding: 0.5rem 3rem 0.5rem 0.75rem;
  font-size: 1rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  min-height: 44px;
  transition: border-color var(--transition), box-shadow var(--transition);
  -moz-appearance: textfield;
}

.input-wrap input::-webkit-outer-spin-button,
.input-wrap input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

.input-wrap input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.input-unit {
  position: absolute;
  right: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
  pointer-events: none;
}

.field-hint {
  font-size: 0.8125rem;
  color: var(--text-weak);
}

/* =========================================
   結果表示エリア
   ========================================= */
.result-area {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1.5px solid var(--border);
}

.result-main-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(135deg, #f0fdf9 0%, #e6fbf6 100%);
  border: 1.5px solid #99f6e4;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 0.875rem;
}

.result-icon-wrap {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
}

.result-value-wrap {
  flex: 1;
}

.result-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  display: block;
}

.result-value-row {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  margin-top: 0.15rem;
  flex-wrap: wrap;
}

.result-prefix {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 600;
}

.result-value {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(2.25rem, 7vw, 3.25rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.result-unit {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
}

.result-sublabel {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: block;
  margin-top: 0.1rem;
}

/* 4%ルールバッジ */
.four-pct-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  color: #92400e;
  margin-bottom: 1rem;
}

.four-pct-badge i {
  color: #d97706;
  flex-shrink: 0;
}

/* サマリーグリッド */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 500px) {
  .summary-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.summary-item {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  text-align: center;
}

.summary-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.summary-value {
  display: block;
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.summary-value.positive {
  color: #059669;
}

/* =========================================
   グラフセクション
   ========================================= */
.chart-section {
  margin-bottom: 1.25rem;
}

.chart-container {
  position: relative;
  height: 280px;
}

@media (min-width: 640px) {
  .chart-container {
    height: 340px;
  }
}

/* =========================================
   シナリオ比較テーブル
   ========================================= */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.scenario-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.scenario-table th {
  background: var(--primary);
  color: #fff;
  padding: 0.625rem 1rem;
  text-align: left;
  font-weight: 700;
  font-size: 0.875rem;
}

.scenario-table th:last-child,
.scenario-table td:last-child {
  text-align: right;
}

.scenario-table td {
  padding: 0.625rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  font-size: 0.9375rem;
}

.scenario-table tr:last-child td {
  border-bottom: none;
}

.scenario-table tr:nth-child(even) td {
  background: #f8fafc;
}

.scenario-table tr.highlighted td {
  background: var(--primary-light);
  font-weight: 700;
  color: var(--accent-dark);
}

.scenario-table tr.highlighted td:first-child::after {
  content: '';
}

.current-mark {
  font-size: 0.75em;
  font-weight: 600;
  color: var(--accent);
  margin-left: 0.3em;
  opacity: 0.85;
}

/* =========================================
   使い方セクション
   ========================================= */
.howto-section {
  margin-bottom: 1.25rem;
}

.howto-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.howto-step {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
}

.step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.1rem;
}

.howto-step div {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #374151;
}

.howto-step strong {
  color: var(--text);
}

/* =========================================
   アコーディオン
   ========================================= */
.accordion-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.accordion-item[open] {
  border-color: #99f6e4;
}

.accordion-summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  cursor: pointer;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
  background: #f8fafc;
  min-height: 48px;
  user-select: none;
  list-style: none;
  transition: background var(--transition);
}

.accordion-summary::-webkit-details-marker {
  display: none;
}

.accordion-summary:hover {
  background: #f0fdf9;
}

.accordion-item[open] .accordion-summary {
  background: #f0fdf9;
  color: var(--primary);
}

.accordion-summary > i:first-child {
  color: var(--primary);
  font-size: 1rem;
  flex-shrink: 0;
}

.accordion-summary span {
  flex: 1;
}

.accordion-chevron {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.accordion-item[open] .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  color: #374151;
  line-height: 1.75;
  background: var(--surface);
}

.accordion-list-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.accordion-list-items li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.accordion-list-items li::before {
  content: '•';
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.05em;
}

.accordion-list-items a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.accordion-list-items a:hover {
  color: var(--accent-dark);
}

.mt-3 {
  margin-top: 0.75rem;
}

/* =========================================
   FAQ
   ========================================= */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  padding: 0.875rem 1rem;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
}

.faq-q {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.faq-a {
  font-size: 0.9rem;
  color: #374151;
  line-height: 1.7;
}

/* =========================================
   免責事項
   ========================================= */
.disclaimer-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: #f8fafc;
  border-left: 3px solid var(--border);
  padding: 0.5rem 0.75rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* =========================================
   フッター
   ========================================= */
footer {
  text-align: center;
  padding: 2rem 1.25rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  max-width: 760px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  margin-bottom: 0.75rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-weak);
}

/* ===== プライバシーノート ===== */
.privacy-note {
  font-size: 0.8rem;
  color: #4b5563;
  background: #f0fdf4;
  border-left: 3px solid #86efac;
  padding: 0.5rem 0.875rem;
  border-radius: 0 6px 6px 0;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}
.privacy-note .bi { margin-right: 0.3em; color: #16a34a; }