/* ===== CSS変数（ライトモード） ===== */
:root {
  --color-bg: #fbfbfc;
  --color-bg-block: #fff;
  --color-bg-secondary: #fcfcfc;
  --color-text: #555;
  --color-text-secondary: #666;
  --color-text-muted: #999;
  --color-accent: #89c1ee;
  --color-accent-hover: #a3d2f8;
  --color-accent-visited: #40799e;
  --color-border: #d9d9d9;
  --color-input-bg: #fff;
  --color-input-border: #d9d9d9;
  --color-input-placeholder: #aaa;
  --color-input-focus-border: #c4c4c4;
  --color-replaced-bg: #b8e3c3;
  --color-replaced-text: #555;
  --color-replaced-blink: #5bc98a;
  --color-confirm-bg: #fff3cd;
  --color-confirm-text: #856404;
  --color-confirm-blink: #ffd54f;
  --color-tooltip-bg: #555;
  --color-tooltip-text: #f0f5fa;
  --color-btn-secondary-text: #888;
  --color-btn-secondary-bg: #f5f5f5;
  --color-btn-secondary-hover: #efefef;
  --color-btn-delete-hover: #c0392b;
  --color-table-even-bg: #f8f8f8;
  --color-settings-title: #555;
  --color-hint-text: #c4c4c4;
  --color-header-title: #555;
  --color-header-description: #888;
  --color-text-footer: #888;
  --color-bg-copyright: #444;
  --color-warning-text: #b8860b;
  --color-warning-icon: #d4a017;
  --color-error: #e74c3c;
  --color-toast-bg: #3a9e6e;
  --color-promo-bg: #fffbeb;
  --color-promo-feature-list-bg: #fff;
  --color-promo-border: #e8c84a;
  --color-promo-border-feature: #edd878;
  --color-promo-badge-bg: #c8960a;
  --color-promo-icon: #c8960a;
  --color-promo-title: #8a6800;
  --color-promo-text: #5c4600;
  --color-promo-price: #8a6800;
  --color-promo-check-icon: #c8960a;
  --color-btn-purchase-bg: #c8960a;
  --color-btn-purchase-hover: #a07808;
  --color-legal-accent: #50a6eb;
}

/* ===== ダークモード ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #101a24;
    --color-bg-block: #162030;
    --color-bg-secondary: #0e1a28;
    --color-text: #e0e8f0;
    --color-text-secondary: #7396b4;
    --color-text-muted: #6a8298;
    --color-accent: #1e8fcf;
    --color-accent-hover: #3da6e2;
    --color-accent-visited: #5096b8;
    --color-border: #283848;
    --color-input-bg: #1f2b3d;
    --color-input-border: #283848;
    --color-input-placeholder: #5e7588;
    --color-input-focus-border: #68b8da;
    --color-replaced-bg: #162e1e;
    --color-replaced-text: #7ed99a;
    --color-replaced-blink: #3a7a3a;
    --color-confirm-bg: #2e2a16;
    --color-confirm-text: #e8c95a;
    --color-confirm-blink: #7a6a30;
    --color-tooltip-bg: #243444;
    --color-tooltip-text: #e0e8f0;
    --color-btn-secondary-text: #fff;
    --color-btn-secondary-bg: #035583;
    --color-btn-secondary-hover: #09689d;
    --color-btn-delete-hover: #e74c3c;
    --color-settings-title: #1e8fcf;
    --color-hint-text: #88a0b4;
    --color-header-title: #68b8da;
    --color-header-description: #6787a2;
    --color-text-footer: #88a0b4;
    --color-bg-copyright: #162030;
    --color-warning-text: #c8a030;
    --color-warning-icon: #a07820;
    --color-error: #e74c3c;
    --color-toast-bg: #3a9e6e;
    --color-promo-bg: #1e1a08;
    --color-promo-feature-list-bg: #393016;
    --color-promo-border: #6a5518;
    --color-promo-border-feature: #4a3c10;
    --color-promo-badge-bg: #7a5c0a;
    --color-promo-icon: #a07820;
    --color-promo-title: #c8a030;
    --color-promo-text: #b69634;
    --color-promo-price: #c8a030;
    --color-promo-check-icon: #a07820;
    --color-btn-purchase-bg: #8a6800;
    --color-btn-purchase-hover: #705606;
    --color-legal-accent: #50a6eb;
  }
}

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

body {
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", "Meiryo", sans-serif;
}

[contenteditable],
input[type="text"] {
  -webkit-user-select: text;
  user-select: text;
}

a {
  color: var(--color-accent);
}

a:hover {
  color: var(--color-accent-hover);
}


/* ===== ヘッダー ===== */
.header {
  text-align: center;
  padding-top: 64px;
  padding-bottom: 56px;
}

@media (max-width: 767px) {
  .header {
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 40px;
    padding-bottom: 36px;
  }
}

.header-title {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  line-height: 1.5;
  letter-spacing: 0.12em;
  color: var(--color-header-title);
  font-weight: 700;
}

@media (max-width: 767px) {
  .header-title {
    font-size: 18px;
  }
}

.header-title span {
  font-size: 12px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 5px;
  padding: 0.2rem 0.6rem;
  margin-left: 0.5rem;
}

.header-description {
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--color-header-description);
  margin-top: 1.2rem;
}

@media (max-width: 767px) {
  .header-description {
    font-size: 11px;
    margin-top: 10px;
  }
}

.contents-wrap {
  width: 100%;
  background: var(--color-bg-block);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  padding-left: 36px;
  padding-right: 36px;
  padding-top: 40px;
  padding-bottom: 40px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .contents-wrap {
    max-width: 1000px;
    border-radius: 10px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .contents-wrap {
    margin-left: 20px;
    margin-right: 20px;
  }
}

@media (max-width: 767px) {
  .contents-wrap {
    border-radius: 0;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 28px;
    padding-bottom: 28px;
  }
}

/* ===== ボタン共通 ===== */
.btn-icon {
  margin-right: 6px;
}

/* ボタン：プライマリ共通 */
.btn-primary {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--color-accent);
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
}

@media (min-width: 768px) {
  .btn-primary {
    transition: background 0.2s;
  }
}

@media (min-width: 768px) {
  .btn-primary:hover {
    background: var(--color-accent-hover);
  }
}

/* ボタン：セカンダリ共通 */
.btn-secondary {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-btn-secondary-text);
  background: var(--color-btn-secondary-bg);
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
}

@media (min-width: 768px) {
  .btn-secondary {
    transition: background 0.2s;
  }
}

@media (min-width: 768px) {
  .btn-secondary:hover {
    background: var(--color-btn-secondary-hover);
  }
}

.btn-group {
  display: flex;
  gap: 20px;
  margin-top: 28px;
}

@media (max-width: 767px) {
  .btn-group {
    margin-top: 20px;
  }
}

.link-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--color-accent);
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  padding-left: 24px;
  padding-right: 24px;
  margin-top: 28px;
}

@media (min-width: 768px) {
  .link-btn-primary {
    transition: background 0.2s;
  }
}

@media (min-width: 768px) {
  .link-btn-primary:hover {
    color: #fff;
    background: var(--color-accent-hover);
  }
}

.link-btn-icon {
  margin-left: 6px;
}


/* ===== ボタン：サンプル ===== */
.btn-sample {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-header-description);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  padding-left: 20px;
  padding-right: 20px;
  padding-top: 8px;
  padding-bottom: 8px;
  margin-top: 20px;
}

@media (max-width: 767px) {
  .btn-sample {
    font-size: 12px;
    margin-top: 16px;
  }
}

@media (min-width: 768px) {
  .btn-sample {
    transition: border-color 0.2s, color 0.2s;
  }
}

@media (min-width: 768px) {
  .btn-sample:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
  }
}

/* ===== フッター ===== */
.attention {
  text-align: center;
  padding-left: 20px;
  padding-right: 20px;
  padding-top: 56px;
  padding-bottom: 56px;
}

@media (max-width: 767px) {
  .attention {
    padding-top: 40px;
    padding-bottom: 40px;
  }
}

.attention-text {
  font-size: 12px;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--color-text-footer);
}

@media (max-width: 767px) {
  .attention-text {
    font-size: 10px;
  }
}

.attention-text--brand {
  margin-top: 20px;
  letter-spacing: 0.1em;
}

.attention-text--brand::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--color-text);
  margin: 2rem auto 1rem;
}

.footer {
  text-align: center;
  background: var(--color-bg-copyright);
  padding-top: 20px;
  padding-bottom: 20px;
}

.footer-link {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 5px;
}

.footer-link a {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: #fff;
}

.footer-link a:hover {
  opacity: 0.7;
}

.footer-copyright {
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #fff;
}

@media (max-width: 767px) {
  .footer-copyright {
    font-size: 10px;
  }
}

/* ===== カスタムチェックボックス共通 ===== */
.custom-checkbox {
  display: inline-block;
  width: 20px;
  height: 20px;
  position: relative;
  background: var(--color-input-bg);
  border: 1.5px solid var(--color-input-border);
  border-radius: 4px;
  -webkit-appearance: none;
  appearance: none;
  vertical-align: middle;
  cursor: pointer;
}

@media (min-width: 768px) {
  .custom-checkbox {
    transition: background 0.2s, border-color 0.2s;
  }
}

@media (max-width: 767px) {
  .custom-checkbox {
    width: 18px;
    height: 18px;
  }
}

.custom-checkbox:hover {
  border-color: var(--color-accent);
}

.custom-checkbox:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.custom-checkbox:checked::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg);
}

@media (max-width: 767px) {
  .custom-checkbox:checked::after {
    left: 5px;
    top: 2px;
  }
}