/* ==========================================================================
   チリツモ逆算シミュレーター スタイルシート v2 (KatakataLab)
   ========================================================================== */

:root {
  --c-bg: #fffdf7;
  --c-surface: #ffffff;
  --c-surface-hover: #fef9e7;
  --c-text: #1c1917;
  --c-text-muted: #57534e;
  --c-text-light: #78716c;
  --c-border: #fcd34d;

  /* アクセントカラー（アンバー／ゴールド／エメラルド） */
  --c-primary: #b45309;
  --c-primary-light: #fef3c7;
  --c-primary-hover: #92400e;
  --c-gold: #d97706;
  --c-green: #047857;
  --c-green-light: #d1fae5;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

/* ダークモード */
body.dark-mode {
  --c-bg: #141210;
  --c-surface: #262220;
  --c-surface-hover: #38332f;
  --c-text: #fafaf9;
  --c-text-muted: #d6d3d1;
  --c-text-light: #a8a29e;
  --c-border: #78350f;
  --c-primary: #f59e0b;
  --c-primary-light: #451a03;
  --c-green: #10b981;
  --c-green-light: #064e3b;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Outfit", "M PLUS Rounded 1c", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background-color: var(--c-bg);
  color: var(--c-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  padding-top: max(0.5rem, env(safe-area-inset-top, 0px));
  padding-right: max(1rem, env(safe-area-inset-right, 0px));
  padding-bottom: calc(6.5rem + env(safe-area-inset-bottom, 0px)); /* Stickyバー分の下部余白 + セーフエリア */
  padding-left: max(1rem, env(safe-area-inset-left, 0px));
  position: relative;
}

:focus-visible {
  outline: 3px solid var(--c-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(180, 83, 9, 0.2);
}

/* スクリーンリーダー専用ユーティリティ */
.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;
}

.tool-wrapper {
  max-width: 860px;
  margin: 0 auto;
}

/* パンくずリスト */
.breadcrumbs-tool {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 0.5rem;
}
.breadcrumbs-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.breadcrumbs-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.bc-home {
  color: #ff7675;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.bc-sep { opacity: 0.4; }
.bc-current { font-weight: 700; color: var(--c-text); }
.bc-all-tools, .bc-other-tool {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-text-muted);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  background: var(--c-surface-hover);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.bc-other-tool {
  color: #4338ca;
  background: #e0e7ff;
}
body.dark-mode .bc-other-tool {
  background: #2e1065;
  color: #c7d2fe;
}
.bc-all-tools:hover, .bc-other-tool:hover {
  filter: brightness(0.95);
}

/* ヒーローヘッダー */
.hero-header {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
}
.hero-badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: var(--c-primary-light);
  color: var(--c-primary);
  font-size: 0.82rem;
  font-weight: 700;
  border-radius: 20px;
  margin-bottom: 0.75rem;
  border: 1px solid var(--c-border);
}
.hero-title {
  font-size: clamp(1.6rem, 4.5vw, 2.2rem);
  font-weight: 850;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--c-text);
}
.hero-subtitle {
  font-size: 1rem;
  color: var(--c-text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* 共通カード */
.card-container, .article-guide, .cross-promo-card {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  contain: layout style;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.card-header-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.step-num {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  background: var(--c-primary);
  color: #fff;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  letter-spacing: 0.05em;
}
.card-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--c-text);
}
.card-desc {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  margin-bottom: 1.25rem;
}
.sub-link-btn {
  background: transparent;
  border: none;
  color: var(--c-primary);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  text-decoration: underline;
}

/* 出費グリッド */
.expense-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.expense-item {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}
.expense-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.expense-item.active {
  border-color: var(--c-gold);
  background: linear-gradient(180deg, var(--c-surface) 0%, rgba(217, 119, 6, 0.05) 100%);
  animation: bounceMini 0.25s ease-out;
}
@keyframes bounceMini {
  0% { transform: scale(0.98); }
  60% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

.expense-item-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}
.expense-item-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  padding-right: 0.5rem;
}
.expense-icon {
  font-size: 1.6rem;
  line-height: 1;
}
.expense-name {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--c-text);
  word-break: break-word;
}

.expense-controls-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}
.stepper-wrap {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  height: 42px;
}
.step-btn {
  background: var(--c-surface-hover);
  border: none;
  font-size: 1.15rem;
  font-weight: 750;
  color: var(--c-text);
  width: 38px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.15s;
}
.step-btn:hover { background: var(--c-border); }
.expense-amount-input {
  width: 75px;
  height: 100%;
  border: none;
  font-size: 0.98rem;
  font-weight: 800;
  text-align: right;
  padding: 0 6px;
  color: var(--c-text);
  background: transparent;
  outline: none;
  font-variant-numeric: tabular-nums;
}
.expense-amount-input:focus-visible {
  outline: 2px solid var(--c-primary);
  border-radius: 4px;
}

.expense-freq-select {
  height: 42px;
  min-height: 42px;
  padding: 0 0.6rem;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-text);
  background: var(--c-surface);
  cursor: pointer;
  outline: none;
}
.expense-freq-select:focus-visible {
  outline: 2px solid var(--c-primary);
}
.expense-del-btn {
  background: transparent;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  opacity: 0.6;
  border-radius: var(--radius-sm);
  transition: opacity 0.2s, background-color 0.2s;
}
.expense-del-btn:hover {
  opacity: 1;
  background: rgba(239, 68, 68, 0.1);
}

.expense-monthly-preview {
  font-size: 0.85rem;
  font-weight: 750;
  color: var(--c-primary);
  margin-top: 0.6rem;
  text-align: right;
}

/* トグルスイッチ */
.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 32px;
  flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.switch input:focus-visible + .slider {
  outline: 2.5px solid var(--c-primary);
  outline-offset: 3px;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 4px; left: 2px; right: 2px; bottom: 4px;
  background-color: #cbd5e1;
  transition: .3s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .3s;
}
input:checked + .slider { background-color: var(--c-gold); }
input:checked + .slider:before { transform: translateX(20px); }
.slider.round { border-radius: 34px; }
.slider.round:before { border-radius: 50%; }

/* カスタム追加フォーム */
.custom-expense-box {
  border-top: 1px dashed var(--c-border);
  padding-top: 1rem;
}
.toggle-custom-btn {
  background: transparent;
  border: 1px dashed var(--c-primary);
  color: var(--c-primary);
  font-weight: 700;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
  min-height: 40px;
}
.toggle-custom-btn:hover { background: var(--c-primary-light); }
.custom-form {
  margin-top: 1rem;
  background: var(--c-surface-hover);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--c-border);
}
.custom-input-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}
.input-text {
  flex: 2;
  min-width: 160px;
  min-height: 44px;
  height: 44px;
  padding: 0 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  background: var(--c-surface);
  color: var(--c-text);
  outline: none;
}
.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}
.input-number {
  width: 100px;
  min-height: 44px;
  height: 44px;
  padding: 0 1.5rem 0 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  text-align: right;
  background: var(--c-surface);
  color: var(--c-text);
  outline: none;
}
.unit-label {
  position: absolute;
  right: 0.5rem;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  pointer-events: none;
}
.select-freq {
  min-height: 44px;
  height: 44px;
  padding: 0 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  background: var(--c-surface);
  color: var(--c-text);
  outline: none;
}
.add-btn {
  background: var(--c-primary);
  color: #fff;
  border: none;
  font-weight: 700;
  min-height: 44px;
  height: 44px;
  padding: 0 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.add-btn:hover { background: var(--c-primary-hover); }

/* Step 2: サマリーカード */
.summary-card {
  border: 2px solid var(--c-gold);
  background: linear-gradient(180deg, var(--c-surface) 0%, rgba(217, 119, 6, 0.05) 100%);
}
.summary-hero {
  text-align: center;
  padding: 1.5rem 1rem 1rem;
}
.summary-period-label {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--c-primary);
  margin-bottom: 0.35rem;
}
.summary-amount-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}
.currency-mark {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--c-primary);
}
.summary-amount {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--c-text);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
@media (max-width: 500px) {
  .summary-amount { font-size: 2.6rem; }
  .currency-mark { font-size: 1.7rem; }
}
.summary-sub-stats {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.stat-pill {
  font-size: 0.85rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  color: var(--c-text-muted);
}
.stat-pill strong { color: var(--c-text); }

/* 期間タブ */
.period-tabs {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  margin: 1.5rem 0 1.25rem;
  flex-wrap: wrap;
}
.period-tab {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  color: var(--c-text-muted);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.period-tab:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.period-tab.active {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #ffffff;
}

/* 投資トグル */
.invest-toggle-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
}
.invest-toggle-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.invest-icon { font-size: 1.6rem; }
.invest-title {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--c-text);
}
.invest-desc {
  font-size: 0.8rem;
  color: var(--c-text-muted);
}

.invest-result-banner {
  margin-top: 1rem;
  background: #fffbeb;
  border: 1.5px solid #d97706;
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
}
body.dark-mode .invest-result-banner { background: #451a03; }
.invest-banner-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.35rem;
}
.invest-badge {
  font-size: 0.75rem;
  font-weight: 800;
  background: #d97706;
  color: #fff;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}
.invest-banner-text {
  font-size: 0.95rem;
  color: var(--c-text);
}
.highlight-gold {
  color: #d97706;
  font-size: 1.15rem;
}

/* 視覚的比較バー */
.invest-compare-bar-wrap {
  margin: 0.85rem 0 0.5rem;
}
.invest-compare-labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  margin-bottom: 0.4rem;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}
.compare-label-savings strong {
  color: var(--c-primary);
}
.compare-label-profit strong {
  color: #b45309;
}
body.dark-mode .compare-label-profit strong {
  color: #fbbf24;
}
.invest-compare-track {
  height: 14px;
  background: var(--c-border);
  border-radius: 999px;
  overflow: hidden;
  display: flex;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}
.invest-bar-savings {
  height: 100%;
  background: var(--c-primary);
  transition: width var(--transition-fast);
}
.invest-bar-profit {
  height: 100%;
  background: linear-gradient(90deg, #f59e0b, #d97706);
  transition: width var(--transition-fast);
}

.invest-note {
  font-size: 0.78rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* サウンド切り替えボタン */
.sound-toggle-btn {
  background: var(--c-surface-hover);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.4rem 0.85rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--c-text);
  cursor: pointer;
  transition: all 0.2s;
}
.sound-toggle-btn:hover {
  background: var(--c-border);
}
.sound-toggle-btn.muted {
  opacity: 0.85;
  border-style: dashed;
}

/* Step 3: ご褒美グリッド */
.reward-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.1rem;
  margin-bottom: 1.5rem;
}
.reward-card-item {
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  background: var(--c-surface);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
.reward-card-item.locked {
  opacity: 0.55;
  filter: grayscale(0.7);
}
.reward-card-item.unlocked {
  border-color: #059669;
  background: linear-gradient(180deg, var(--c-surface) 0%, rgba(5, 150, 105, 0.06) 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.reward-badge-status {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
}
.status-unlocked {
  background: #d1fae5;
  color: #064e3b;
}
.status-locked {
  background: #e2e8f0;
  color: #475569;
}
body.dark-mode .status-locked {
  background: #334155;
  color: #cbd5e1;
}

.reward-icon {
  font-size: 2.4rem;
  margin-bottom: 0.5rem;
}
.reward-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: 0.25rem;
}
.reward-cost {
  font-size: 0.88rem;
  font-weight: 750;
  color: var(--c-primary);
  margin-bottom: 0.5rem;
}
.reward-desc {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

/* プログレスバー */
.reward-progress-wrap {
  background: var(--c-surface-hover);
  border-radius: 6px;
  height: 8px;
  overflow: hidden;
  position: relative;
}
.reward-progress-bar {
  background: #10b981;
  height: 100%;
  border-radius: 6px;
  transition: width 0.4s ease;
}
.reward-progress-label {
  font-size: 0.72rem;
  color: var(--c-text-muted);
  margin-top: 0.3rem;
  text-align: right;
}

/* かたかたアドバイス */
.katakata-advice-box {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--c-primary-light);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.advice-avatar {
  font-size: 2.2rem;
  background: #ffffff;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
body.dark-mode .advice-avatar { background: #262220; }
.advice-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-primary);
  margin-bottom: 0.35rem;
}
.advice-text {
  font-size: 0.9rem;
  color: var(--c-text);
  line-height: 1.7;
}

/* シェアボタン */
.share-row {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.share-btn {
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 750;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: none;
  min-height: 44px;
}
.copy-btn {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  color: var(--c-text);
}
.copy-btn:hover { background: var(--c-surface-hover); }
.share-native-btn {
  background: #059669;
  color: #fff;
}
.x-btn {
  background: #000000;
  color: #ffffff;
}
.x-btn:hover { background: #262626; }
.print-btn {
  background: var(--c-surface-hover);
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
}

/* クロスプロモカード */
.cross-promo-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: #eef2ff;
  border: 1.5px solid #c7d2fe;
}
body.dark-mode .cross-promo-card {
  background: #1e1b4b;
  border-color: #4338ca;
}
.cross-promo-icon { font-size: 2.5rem; flex-shrink: 0; }
.cross-promo-content h4 {
  font-size: 1rem;
  font-weight: 750;
  color: #3730a3;
  margin-bottom: 0.25rem;
}
body.dark-mode .cross-promo-content h4 { color: #c7d2fe; }
.cross-promo-content p {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.5;
  margin-bottom: 0.6rem;
}
.cross-promo-btn {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: #4338ca;
  text-decoration: underline;
}
body.dark-mode .cross-promo-btn { color: #a5b4fc; }

/* Sticky 追従バー */
.sticky-summary-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--c-surface);
  border-top: 2px solid var(--c-gold);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
  padding: 0.6rem 1rem calc(0.6rem + env(safe-area-inset-bottom, 0px));
  z-index: 999;
  display: block;
  will-change: transform;
}
.sticky-bar-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.sticky-bar-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.sticky-period-badge {
  font-size: 0.72rem;
  font-weight: 800;
  background: var(--c-primary-light);
  color: var(--c-primary);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}
.sticky-amount {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--c-text);
  font-variant-numeric: tabular-nums;
}
.sticky-reward-preview {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #059669;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
@media (max-width: 580px) {
  .sticky-reward-preview { display: none; }
}
.sticky-jump-btn {
  background: var(--c-primary);
  color: #fff;
  border: none;
  font-size: 0.82rem;
  font-weight: 750;
  padding: 0.45rem 0.85rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.sticky-jump-btn:active {
  transform: scale(0.97);
}

/* 読み物・ガイド */
.article-guide { margin-top: 2rem; }
.guide-heading {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  color: var(--c-text);
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}
.guide-item h3 {
  font-size: 0.98rem;
  font-weight: 750;
  margin-bottom: 0.4rem;
  color: var(--c-text);
}
.guide-item p {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.sound-toggle-btn {
  background: var(--c-surface-hover);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  color: var(--c-text);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}
.sound-toggle-btn:hover {
  background: var(--c-primary-light);
  border-color: var(--c-primary);
}

.hidden { display: none !important; }

/* 極小スマートフォン向け調整 (<= 380px) */
@media (max-width: 380px) {
  body {
    padding-left: max(0.5rem, env(safe-area-inset-left, 0px));
    padding-right: max(0.5rem, env(safe-area-inset-right, 0px));
  }
  .tool-wrapper {
    padding-left: 0;
    padding-right: 0;
  }
  .card-container, .article-guide, .cross-promo-card {
    padding: 1.1rem 0.75rem;
  }
  .summary-card {
    padding: 1.2rem 0.75rem;
  }
  .summary-amount {
    font-size: 2.1rem;
  }
  .currency-mark {
    font-size: 1.4rem;
  }
  .stepper-wrap {
    height: 44px;
  }
  .step-btn {
    width: 36px;
  }
  .expense-amount-input {
    width: 62px;
    font-size: 0.9rem;
  }
  .period-tabs {
    gap: 0.25rem;
  }
  .period-tab {
    padding: 0.4rem 0.65rem;
    font-size: 0.78rem;
    min-height: 40px;
  }
  .invest-compare-labels {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
  }
  .custom-input-row {
    flex-direction: column;
    align-items: stretch;
  }
  .custom-input-row .input-text,
  .custom-input-row .input-with-unit,
  .custom-input-row .input-number,
  .custom-input-row .select-freq,
  .custom-input-row .add-btn {
    width: 100%;
  }
  .share-row {
    flex-direction: column;
  }
  .share-btn {
    width: 100%;
    justify-content: center;
  }
  .sticky-summary-bar {
    padding-left: max(0.5rem, env(safe-area-inset-left, 0px));
    padding-right: max(0.5rem, env(safe-area-inset-right, 0px));
  }
  .sticky-amount {
    font-size: 1.1rem;
  }
  .sticky-jump-btn {
    padding: 0.35rem 0.65rem;
    font-size: 0.75rem;
  }
}

/* 視覚刺激低減 (prefers-reduced-motion) */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 印刷スタイル */
@media print {
  body { background: #fff; color: #000; padding: 0; }
  .breadcrumbs-tool, .sticky-summary-bar, .custom-expense-box, .period-tabs, .invest-toggle-box, .share-row, .cross-promo-card, .tool-footer {
    display: none !important;
  }
  .card-container {
    border: 1px solid #ccc;
    box-shadow: none;
    page-break-inside: avoid;
  }
}

/* ハイコントラストモード対応（Windows / 支援技術） */
@media (forced-colors: active) {
  :focus-visible {
    outline: 3px solid Highlight !important;
    outline-offset: 3px !important;
  }
  .period-tab.active, .add-btn, .sticky-jump-btn, .share-native-btn {
    forced-color-adjust: none;
    background-color: Highlight !important;
    color: HighlightText !important;
    border: 2px solid HighlightText !important;
  }
  .period-tab, .step-btn, .toggle-custom-btn, .sound-toggle-btn, .sub-link-btn, .share-btn, .expense-del-btn {
    border: 1.5px solid ButtonBorder !important;
  }
  .card-container, .expense-item, .reward-card-item, .article-guide, .cross-promo-card, .katakata-advice-box, .sticky-summary-bar, .breadcrumbs-tool {
    border: 2px solid CanvasText !important;
  }
  .input-text, .input-number, .select-freq, .expense-amount-input, .expense-freq-select {
    border: 1.5px solid CanvasText !important;
  }
  .reward-progress-wrap {
    border: 1px solid CanvasText !important;
  }
  .reward-progress-bar {
    background: Highlight !important;
  }
  .slider {
    border: 1px solid ButtonBorder !important;
  }
  input:checked + .slider {
    background-color: Highlight !important;
  }
}