/* =====================================================================
   AI業務診断LP スタイル
   ブランド: .design-consultant/brand-guidelines/個人ブランド-v1.md
   ポートフォリオサイト（site/styles.css）と同じデザインシステムを使用
   ===================================================================== */

:root {
  --color-primary: #8B5E52;   /* テラコッタブラウン：見出し */
  --color-secondary: #4A4038; /* ダークウォームグレー：ナビ・CTA・フッター */
  --color-accent: #C98B6B;    /* テラコッタオレンジ：装飾専用（文字には使わない） */
  --color-bg: #FAF6F2;
  --color-bg-white: #FFFFFF;
  --color-text: #3A2E28;

  --font-heading: "Zen Old Mincho", "游明朝", YuMincho, serif;
  --font-body: "Noto Sans JP", "Inter", sans-serif;

  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 600;

  --container-narrow: 640px;
  --container-wide: 960px;
}

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

html {
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: inherit;
}

/* ---- ヘッダー ---- */
.site-header {
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-secondary);
}

.site-header__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-header__avatar {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.site-header__name {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  white-space: nowrap;
}

.site-header__tagline {
  font-size: 11px;
  font-weight: var(--weight-normal);
  color: var(--color-secondary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-nav__social {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: 4px;
  padding-left: 14px;
  border-left: 1px solid rgba(74, 64, 56, 0.22);
}

.site-nav__social a {
  font-size: 13px;
  font-weight: var(--weight-medium);
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-nav__social a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.site-nav__link {
  font-size: 13px;
  font-weight: var(--weight-medium);
  text-decoration: none;
  color: var(--color-secondary);
  background-color: var(--color-bg);
  border-radius: 999px;
  padding: 8px 16px;
  box-shadow: 0 1px 2px rgba(58, 46, 40, 0.08);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.site-nav__link:hover {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

/* ---- 共通：セクション見出し ---- */
.section-heading {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: var(--weight-bold);
  line-height: 1.3;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 28px;
}

.section-heading--left {
  text-align: left;
}

/* ---- 共通：カードグリッド ---- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

/* ---- 1. つかみ（ヒーロー） ---- */
.hero {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 72px 24px 56px;
  text-align: center;
}

.hero__headline {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: var(--weight-bold);
  line-height: 1.4;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.hero__subcopy {
  font-size: 16px;
}

/* ---- 今動いているもの ---- */
.now {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 48px 24px;
}

.agent-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-secondary);
  box-shadow: 0 1px 3px rgba(58, 46, 40, 0.06);
  border-radius: 4px;
  padding: 24px;
}

.agent-card__status {
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.agent-card__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  display: inline-block;
  margin-right: 6px;
}

.agent-card__name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: var(--weight-bold);
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.agent-card__desc {
  font-size: 15px;
}

.now__note {
  font-size: 14px;
  color: var(--color-secondary);
  text-align: center;
  margin-top: 24px;
}

/* ---- 3. 持ち帰れるエージェント ---- */
.gifts {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 48px 24px;
}

.gifts__lead {
  font-size: 15px;
  margin-bottom: 28px;
}

.gifts__lead-note {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-secondary);
}

.gift-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-secondary);
  box-shadow: 0 1px 3px rgba(58, 46, 40, 0.06);
  border-radius: 4px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.gift-card__name {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: var(--weight-bold);
  line-height: 1.35;
  color: var(--color-primary);
  margin-bottom: 8px;
  word-break: keep-all;
}

.gift-card__desc {
  font-size: 15px;
  margin-bottom: 16px;
}

.gift-flow {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 2px;
  margin-bottom: 20px;
  flex-grow: 1;
}

.gift-flow li {
  display: flex;
  align-items: center;
}

.gift-flow li span {
  font-size: 12.5px;
  font-weight: var(--weight-medium);
  color: var(--color-secondary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-secondary);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
}

.gift-flow li + li::before {
  content: "→";
  color: var(--color-secondary);
  margin: 0 6px;
  font-size: 12px;
}

.gift-flow__end {
  color: #FFFFFF !important;
  background-color: var(--color-secondary) !important;
}

.gift-card__cta {
  display: inline-block;
  align-self: flex-start;
  text-align: center;
  font-size: 14px;
  font-weight: var(--weight-medium);
  border-radius: 4px;
  padding: 11px 22px;
  background-color: var(--color-secondary);
  color: #FFFFFF;
  text-decoration: none;
}

.gift-card__cta:hover {
  background-color: #3A322B;
}

.gift-card__for {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: var(--weight-medium);
  color: var(--color-secondary);
  letter-spacing: 0.02em;
}

.gift-card__fine {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-secondary);
  margin-bottom: 16px;
}

.gifts__disclaimer {
  margin-top: 32px;
  padding: 20px 24px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-secondary);
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text);
}

.gifts__disclaimer-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 12px;
}

.gifts__disclaimer p + p {
  margin-top: 8px;
}

.gifts__disclaimer ul {
  padding-left: 1.2em;
}

.gifts__disclaimer li + li {
  margin-top: 6px;
}

.gifts__disclaimer ul ul {
  margin-top: 4px;
}

.gifts__disclaimer a {
  color: var(--color-secondary);
  text-decoration: underline;
  overflow-wrap: anywhere;
}

.gifts__note {
  font-size: 14px;
  color: var(--color-secondary);
  text-align: center;
  margin-top: 24px;
}

/* ---- 4. 無料AI業務診断 ---- */
.shindan {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 48px 24px;
  text-align: center;
}

.shindan__scope {
  text-align: center;
  font-size: 14px;
  color: var(--color-secondary);
  margin-top: -16px;
  margin-bottom: 24px;
}

.shindan__lead {
  font-size: 16px;
  margin-bottom: 28px;
  text-align: left;
}

.placeholder-box {
  border: 1px dashed var(--color-secondary);
  border-radius: 4px;
  background-color: var(--color-bg-white);
  padding: 40px 24px;
}

.placeholder-box__label {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: var(--weight-medium);
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.placeholder-box__text {
  font-size: 14px;
  color: var(--color-secondary);
}

/* ---- 4b. 診断ウィジェット ---- */
.shindan-app {
  text-align: left;
}

.sd-panel {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-secondary);
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(58, 46, 40, 0.06);
  padding: 28px 24px;
}

.sd-intro-text {
  font-size: 16px;
  margin-bottom: 12px;
}

.sd-note {
  font-size: 13px;
  color: var(--color-secondary);
  margin-bottom: 16px;
}

.sd-note--foot {
  margin-top: 20px;
  margin-bottom: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(74, 64, 56, 0.2);
}

.sd-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.sd-progress__track {
  height: 5px;
  border-radius: 999px;
  background-color: var(--color-bg);
  overflow: hidden;
}

.sd-progress__fill {
  height: 100%;
  border-radius: 999px;
  background-color: var(--color-primary);
  transition: width 0.25s ease;
}

.sd-progress__label {
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-secondary);
}

.sd-q-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: var(--weight-bold);
  line-height: 1.4;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.sd-q-title:focus-visible,
.sd-result__heading:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

.sd-options {
  border: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.sd-visually-hidden,
.sd-option input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.sd-option {
  display: block;
  position: relative;
  padding: 12px 16px 12px 44px;
  border: 1px solid var(--color-secondary);
  border-radius: 4px;
  font-size: 15px;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.sd-option::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  border: 1px solid var(--color-secondary);
  border-radius: 3px;
  background-color: var(--color-bg-white);
}

/* 単一選択（ラジオ）は丸チェックにする（複数選択の四角と区別） */
.sd-option:has(input[type="radio"])::before {
  border-radius: 50%;
}
.sd-option:has(input[type="radio"]:checked)::after {
  left: 21px;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border: none;
  border-radius: 50%;
  background-color: #FFFFFF;
  transform: none;
}

.sd-option:hover {
  background-color: var(--color-bg);
}

.sd-option:has(input:checked) {
  border-color: var(--color-primary);
  background-color: var(--color-bg);
}

.sd-option:has(input:checked)::before {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.sd-option:has(input:checked)::after {
  content: "";
  position: absolute;
  left: 21px;
  top: 50%;
  width: 5px;
  height: 9px;
  margin-top: -6px;
  border: solid #FFFFFF;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.sd-option:has(input:focus-visible) {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sd-error {
  color: #9A3B2C;
  font-size: 14px;
  min-height: 1.2em;
  margin-top: 10px;
}

.sd-nav {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.sd-btn {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: var(--weight-medium);
  border-radius: 4px;
  padding: 12px 24px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.sd-btn--primary {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

.sd-btn--primary:hover {
  background-color: #3A322B;
}

.sd-btn--ghost {
  background-color: var(--color-bg-white);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.sd-btn--ghost:hover {
  background-color: var(--color-bg);
}

.sd-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 結果 */
.sd-result__heading {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.sd-result__subheading {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin: 24px 0 10px;
}

.sd-type__bottleneck {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 4px;
  padding: 14px 16px;
  background-color: var(--color-bg);
  border-left: 3px solid var(--color-primary);
  border-radius: 4px;
}

.sd-pileup {
  margin-bottom: 20px;
  padding: 14px 16px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-primary);
  border-radius: 4px;
}

.sd-pileup__label {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.sd-pileup__text {
  font-size: 14px;
  line-height: 1.8;
}

.sd-top3 {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sd-top3__item {
  position: relative;
  padding: 16px 16px 16px 52px;
  background-color: var(--color-bg);
  border-left: 3px solid var(--color-primary);
  border-radius: 4px;
}

.sd-top3__rank {
  position: absolute;
  left: 14px;
  top: 14px;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  line-height: 1;
}

.sd-top3__cat {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.sd-top3__why {
  font-size: 14px;
  margin-bottom: 8px;
}

.sd-top3__how {
  font-size: 14px;
}

.sd-top3__how-label {
  display: inline-block;
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  margin-right: 8px;
}

.sd-top3__freq {
  font-size: 13px;
  color: var(--color-secondary);
  margin-top: 8px;
}

.sd-later,
.sd-steps {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
}

.sd-steps__item,
.sd-later__item {
  position: relative;
  padding-left: 18px;
  line-height: 1.85;
}

.sd-steps__item::before,
.sd-later__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.sd-later__item--detour {
  padding-left: 0;
}

.sd-later__item--detour::before {
  display: none;
}

.sd-later__tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  background-color: var(--color-bg);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 2px 10px;
  margin-right: 8px;
}

/* v3 結果ブロック */
.sd-block {
  margin-top: 22px;
}

.sd-block:first-child {
  margin-top: 0;
}

.sd-block__label {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: var(--weight-bold);
  letter-spacing: 0.08em;
  color: var(--color-secondary);
  margin-bottom: 8px;
  white-space: nowrap;
}

.sd-current {
  padding: 16px 18px;
  background-color: var(--color-bg);
  border-radius: 4px;
}

.sd-current__line {
  font-size: 15px;
  line-height: 1.8;
}

.sd-estimate {
  padding: 18px 18px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-primary);
  border-radius: 4px;
}

.sd-estimate__lead {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.sd-estimate__body {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 8px;
  white-space: pre-line;
}

.sd-why {
  font-size: 13px;
  line-height: 1.9;
  color: var(--color-secondary);
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid rgba(74, 64, 56, 0.15);
}

.sd-disclaimer {
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--color-secondary);
  margin-top: 10px;
}

.sd-cta__fallback {
  font-size: 12.5px;
  color: var(--color-secondary);
  margin-top: 4px;
}

.sd-cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
}

.sd-cta--compact {
  margin-top: 12px;
}

.sd-cta .sd-btn {
  text-align: center;
}

.sd-reclaim__nudge {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-top: 10px;
}

.sd-step-note {
  font-size: 13px;
  color: var(--color-secondary);
  margin-top: 10px;
  line-height: 1.8;
}

.sd-later__cat {
  font-weight: var(--weight-medium);
  color: var(--color-primary);
}

.sd-anxiety {
  font-size: 14px;
  margin-top: 12px;
  padding: 12px 16px;
  background-color: var(--color-bg);
  border-radius: 4px;
}

.sd-closing {
  margin-top: 24px;
  padding: 16px 20px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-accent);
  border-radius: 4px;
}

.sd-closing__lead {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.sd-closing__text {
  font-size: 14px;
}

/* 締め：取り戻した時間で何がしたいか */
.sd-reclaim {
  margin-top: 20px;
  padding: 20px;
  background-color: var(--color-bg);
  border-radius: 4px;
}

.sd-reclaim__q {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 12px;
}

.sd-reclaim__form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sd-reclaim__input {
  font-family: var(--font-body);
  font-size: 15px;
  padding: 10px 12px;
  border: 1px solid var(--color-secondary);
  border-radius: 4px;
  background-color: var(--color-bg-white);
  color: var(--color-text);
  width: 100%;
}

.sd-reclaim__input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sd-reclaim__btn {
  align-self: flex-start;
}

.sd-reclaim__reply {
  margin-top: 16px;
}

.sd-reclaim__echo {
  font-size: 14px;
  color: var(--color-secondary);
  margin-bottom: 6px;
}

.sd-reclaim__affirm {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
}

@media (min-width: 480px) {
  .sd-reclaim__form {
    flex-direction: row;
  }
  .sd-reclaim__btn {
    flex-shrink: 0;
  }
}

/* ---- 5. サブクラ ---- */
.subakura {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 48px 24px;
}

.subakura__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: var(--weight-medium);
  color: var(--color-secondary);
  border: 1px solid var(--color-secondary);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 12px;
}

.subakura__body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 16px;
  padding: 20px;
  background-color: var(--color-bg-white);
  border-left: 3px solid var(--color-accent);
}

/* ---- 6. 2つの入口 ---- */
.entry {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.entry-card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-secondary);
  border-radius: 4px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.entry-card__title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: 12px;
}

.entry-card__desc {
  font-size: 15px;
  margin-bottom: 20px;
  flex-grow: 1;
}

.entry-card__cta {
  display: inline-block;
  text-align: center;
  font-size: 15px;
  font-weight: var(--weight-medium);
  border-radius: 4px;
  padding: 12px 24px;
}

.entry-card__cta--pending {
  background-color: var(--color-bg);
  color: var(--color-secondary);
  border: 1px dashed var(--color-secondary);
  cursor: not-allowed;
}

.entry-card__cta--active {
  background-color: var(--color-secondary);
  color: #FFFFFF;
}

.entry-card__cta--active:hover {
  background-color: #3A322B;
}

/* ---- フッター ---- */
.site-footer {
  background-color: var(--color-secondary);
  color: #FFFFFF;
  padding: 32px 24px;
}

.site-footer__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.site-footer__name {
  font-family: var(--font-heading);
  font-size: 16px;
}

.site-footer__nav {
  display: flex;
  gap: 16px;
}

.site-footer__nav a {
  font-size: 13px;
  text-decoration: none;
  color: #FFFFFF;
  opacity: 0.85;
}

.site-footer__nav a:hover {
  opacity: 1;
  text-decoration: underline;
}

.site-footer__copy {
  font-size: 13px;
  opacity: 0.8;
}

/* ---- 先頭に戻るボタン ---- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 2px solid #FFFFFF;
  color: #FFFFFF;
  font-size: 20px;
  line-height: 1;
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(58, 46, 40, 0.35);
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.back-to-top:hover {
  background-color: var(--color-secondary);
  transform: translateY(-4px);
}

.site-nav__link:focus-visible,
.back-to-top:focus-visible,
.entry-card__cta:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---- PC幅（720px以上） ---- */
@media (min-width: 720px) {
  .site-header__inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .site-nav {
    justify-content: flex-end;
  }

  .hero {
    padding: 104px 24px 72px;
  }

  .hero__headline {
    font-size: 40px;
  }

  .section-heading {
    font-size: 32px;
  }

  .card-grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}