/**
 * ======================================================
 *  デザイントークン & 共通スタイル（styles.css）
 *  Apex × クリーン ― 色・余白・フォントはここで一括管理
 * ======================================================
 */

/* ========== 1. デザイントークン（CSS変数） ========== */
:root {
  /* --- カラー --- */
  --color-bg:           #141826;
  --color-bg-alt:       #1a2030;
  --color-surface:      #232a3d;
  --color-surface-hover:#2b344c;
  --color-border:       #313a52;
  --color-border-accent:#3e4968;

  --color-text:         #e8eaf0;
  --color-text-muted:   #9096a8;
  --color-text-dim:     #5c6178;

  --color-accent:       #00e5ff;
  --color-accent-dim:   rgba(0, 229, 255, 0.15);
  --color-accent-hover: #33ecff;
  --color-accent-glow:  rgba(0, 229, 255, 0.25);

  --color-warning:      #ff9800;
  --color-warning-bg:   rgba(255, 152, 0, 0.10);
  --color-success:      #4caf50;
  --color-success-bg:   rgba(76, 175, 80, 0.10);
  --color-danger:       #f44336;

  /* --- タイポグラフィ --- */
  --font-heading: "Rajdhani", "Noto Sans JP", sans-serif;
  --font-body:    "Noto Sans JP", "Helvetica Neue", sans-serif;
  --font-mono:    "JetBrains Mono", monospace;

  /* --- H1 (Desktop) --- */
  --h1-size: 40px;
  --h1-line: 48px;
  /* --- H2 --- */
  --h2-size: 28px;
  --h2-line: 36px;
  /* --- H3 --- */
  --h3-size: 20px;
  --h3-line: 28px;
  /* --- Body --- */
  --body-size: 16px;
  --body-line: 28px;
  /* --- Small --- */
  --small-size: 13px;
  --small-line: 20px;

  /* --- レイアウト --- */
  --max-width:        1120px;
  --padding-x:        24px;
  --section-gap:      72px;
  --card-radius:      6px;
  --card-padding:     24px;
  --btn-radius:       4px;

  /* --- アニメーション --- */
  --ease-out:         cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast:    150ms;
  --duration-normal:  200ms;
  --duration-slow:    300ms;
}

/* ========== 2. リセット & ベース ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: var(--body-line);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}
a:hover {
  color: var(--color-accent-hover);
}
a:visited {
  color: var(--color-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ========== 3. レイアウト ========== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-x);
}

.section {
  padding-block: var(--section-gap);
}

/* ========== 4. タイポグラフィ ========== */
h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

h1 {
  font-size: var(--h1-size);
  line-height: var(--h1-line);
}

h2 {
  font-size: var(--h2-size);
  line-height: var(--h2-line);
}

h3 {
  font-size: var(--h3-size);
  line-height: var(--h3-line);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-dim {
  color: var(--color-text-dim);
}

.text-accent {
  color: var(--color-accent);
}

/* ========== 5. HUD装飾 ========== */
/* セクション見出しの左ライン */
.hud-heading {
  position: relative;
  padding-left: 16px;
}
.hud-heading::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 3px;
  height: calc(100% - 8px);
  background: var(--color-accent);
  border-radius: 2px;
}

/* 小バッジ（カード左上など） */
.hud-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  padding: 3px 10px;
  border-radius: 2px;
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.hud-badge--warning {
  color: var(--color-warning);
  background: var(--color-warning-bg);
  border-color: rgba(255, 152, 0, 0.2);
}

/* ========== 6. ボタン ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  padding: 14px 32px;
  border: none;
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

/* Disabled / aria-disabled */
.btn:disabled,
.btn[aria-disabled="true"],
.btn.is-disabled {
  cursor: not-allowed;
  pointer-events: none;
  opacity: 0.55;
  transform: none;
  box-shadow: none;
}
.btn-primary:disabled,
.btn-primary[aria-disabled="true"],
.btn-primary.is-disabled {
  background: #6b7280;
  color: #0f1117;
}
.btn-secondary:disabled,
.btn-secondary[aria-disabled="true"],
.btn-secondary.is-disabled {
  border-color: var(--color-border);
  background: transparent;
  color: var(--color-text-dim);
}

/* Primary */
.btn-primary {
  color: #0f1117;
  background: var(--color-accent);
  box-shadow: 0 0 0 0 var(--color-accent-glow);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 0 20px 0 var(--color-accent-glow);
  color: #0f1117;
}

/* Secondary */
.btn-secondary {
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border-accent);
}
.btn-secondary:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
}

/* FullWidth（Mobile用） */
.btn--full {
  width: 100%;
}

/* ========== 7. カード ========== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: var(--card-padding);
  transition:
    transform var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out);
}

/* Desktop hover only */
@media (hover: hover) {
  .card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
    border-color: var(--color-border-accent);
  }
}

.card--highlight {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent), 0 0 24px var(--color-accent-glow);
}

/* ========== 8. 注意ボックス ========== */
.notice {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--card-radius);
  border: 1px solid rgba(255, 152, 0, 0.2);
  background: var(--color-warning-bg);
}

.notice__icon {
  font-size: 20px;
  flex-shrink: 0;
  line-height: 28px;
}

.notice__title {
  font-weight: 700;
  font-size: 14px;
  color: var(--color-warning);
  margin-bottom: 4px;
}

.notice__text {
  font-size: var(--small-size);
  line-height: var(--small-line);
  color: var(--color-text-muted);
}

/* ========== 9. FAQ アコーディオン ========== */
.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: none;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--body-size);
  font-weight: 600;
  line-height: var(--body-line);
  text-align: left;
  cursor: pointer;
  min-height: 44px;
  transition: color var(--duration-fast);
}
.faq-question:hover {
  color: var(--color-accent);
}

.faq-question__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  transition: transform var(--duration-normal) var(--ease-out);
}

.faq-item.is-open .faq-question__icon {
  transform: rotate(45deg);
  color: var(--color-accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out);
}

.faq-answer__inner {
  padding: 0 0 20px;
  font-size: 15px;
  line-height: 26px;
  color: var(--color-text-muted);
}

/* ========== 10. ヘッダー ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(20, 24, 38, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.06em;
}
.header__logo:hover {
  color: var(--color-accent);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
}
.header__link:hover {
  color: var(--color-text);
}

.header__cta {
  font-size: 13px;
  padding: 8px 20px;
}

/* Mobile hamburger */
.header__menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(20, 24, 38, 0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 16px var(--padding-x);
  z-index: 99;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav a:last-child {
  border-bottom: none;
}

/* ========== 11. フッター ========== */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__link {
  font-size: var(--small-size);
  color: var(--color-text-dim);
}
.footer__link:hover {
  color: var(--color-text-muted);
}

.footer__copy {
  font-size: var(--small-size);
  color: var(--color-text-dim);
}

/* ========== 12. ヒーロー（トップ） ========== */
.hero {
  padding-top: calc(64px + 80px); /* header + 余白 */
  padding-bottom: var(--section-gap);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__subtitle {
  font-family: var(--font-mono);
  font-size: var(--small-size);
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero__title {
  margin-bottom: 20px;
}

.hero__desc {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero右側 — 抽象ビジュアル */
.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  max-height: 420px;
}

.hero__glow {
  position: absolute;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50%      { opacity: 0.8; transform: scale(1.1); }
}

.hero__shape {
  position: relative;
  width: 200px;
  height: 200px;
  border: 2px solid var(--color-accent);
  transform: rotate(45deg);
  opacity: 0.6;
}

.hero__shape::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid var(--color-accent);
  opacity: 0.4;
}

.hero__shape::after {
  content: "";
  position: absolute;
  inset: 36px;
  border: 1px solid var(--color-accent);
  opacity: 0.2;
}

/* ========== 13. Features ========== */
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.feature-card__icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.feature-card__title {
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 15px;
  line-height: 26px;
  color: var(--color-text-muted);
}

/* ========== 14. 3ステップ ========== */
.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.step-item {
  position: relative;
  padding-left: 0;
}

.step-item__number {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 12px;
}

.step-item__title {
  margin-bottom: 8px;
}

.step-item__desc {
  font-size: 15px;
  line-height: 26px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.step-item__note {
  font-size: var(--small-size);
  color: var(--color-warning);
}

/* ========== 15. プランカード ========== */
.plans__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
  max-width: 800px;
}

.plan-card {
  display: flex;
  flex-direction: column;
}

.plan-card__header {
  margin-bottom: 20px;
}

.plan-card__name {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  margin-top: 12px;
}

.plan-card__price {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 8px;
}

.plan-card__price span {
  font-size: 16px;
  font-weight: 400;
  color: var(--color-text-muted);
}

.plan-card__features {
  list-style: none;
  margin: 20px 0;
  flex-grow: 1;
}

.plan-card__features li {
  position: relative;
  padding-left: 24px;
  padding-block: 6px;
  font-size: 15px;
  color: var(--color-text-muted);
}

.plan-card__features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.plan-card .btn {
  margin-top: auto;
}

/* ========== 16. ページヘッダー（サブページ共通） ========== */
.page-header {
  padding-top: calc(64px + 48px);
  padding-bottom: 32px;
}

.page-header__title {
  margin-bottom: 8px;
}

.page-header__desc {
  color: var(--color-text-muted);
  max-width: 600px;
}

/* ========== 17. 長文ページ（規約等） ========== */
.prose {
  max-width: 760px;
  padding-bottom: var(--section-gap);
}

.prose h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  font-size: var(--h3-size);
}

.prose p {
  margin-bottom: 16px;
  color: var(--color-text-muted);
}

.prose ul {
  margin-bottom: 16px;
  padding-left: 20px;
  color: var(--color-text-muted);
}

.prose li {
  margin-bottom: 8px;
}

/* ========== 18. お問い合わせ ========== */
.contact-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
  max-width: 600px;
}

.contact-card {
  text-align: center;
  padding: 24px 16px;
}

.contact-card__title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.contact-card__desc {
  font-size: var(--small-size);
  color: var(--color-text-muted);
}

/* ========== 19. Fade-in アニメ ========== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 20. ステップ詳細（how-to用） ========== */
.steps-detail {
  max-width: 700px;
}

.step-detail {
  position: relative;
  padding: 32px 0;
  padding-left: 48px;
  border-left: 2px solid var(--color-border);
}

.step-detail:last-child {
  border-left-color: transparent;
}

.step-detail__marker {
  position: absolute;
  left: -18px;
  top: 32px;
  width: 34px;
  height: 34px;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
}

.step-detail__title {
  margin-bottom: 8px;
}

.step-detail__desc {
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.step-detail__screenshot {
  background: var(--color-surface);
  border: 1px dashed var(--color-border-accent);
  border-radius: var(--card-radius);
  padding: 40px;
  text-align: center;
  color: var(--color-text-dim);
  font-size: var(--small-size);
}

/* ========== 21. FAQ ページ — チェックリスト ========== */
.checklist {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  margin-bottom: 32px;
}

.checklist__title {
  font-weight: 700;
  margin-bottom: 16px;
}

.checklist__item {
  position: relative;
  padding-left: 28px;
  padding-block: 6px;
  color: var(--color-text-muted);
  font-size: 15px;
}

.checklist__item::before {
  content: "□";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

/* ========================================
   RESPONSIVE
   ======================================== */

/* --- Tablet --- */
@media (max-width: 1023px) {
  :root {
    --h1-size: 34px;
    --h1-line: 42px;
    --h2-size: 24px;
    --h2-line: 32px;
    --section-gap: 56px;
  }

  .hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 32px;
  }

  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-categories {
    grid-template-columns: 1fr;
  }
}

/* --- Mobile --- */
@media (max-width: 767px) {
  :root {
    --h1-size: 28px;
    --h1-line: 34px;
    --h2-size: 22px;
    --h2-line: 28px;
    --section-gap: 48px;
    --padding-x: 16px;
    --card-padding: 18px;
  }

  /* Header */
  .header__nav {
    display: none;
  }
  .header__menu-btn {
    display: flex;
  }

  /* Hero */
  .hero {
    padding-top: calc(64px + 40px);
    min-height: auto;
  }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero__visual {
    max-height: 200px;
    order: 1;
  }
  .hero__content {
    order: 0;
  }
  .hero__actions {
    flex-direction: column;
  }
  .hero__actions .btn {
    width: 100%;
  }

  /* Features */
  .features__grid {
    grid-template-columns: 1fr;
  }

  /* Steps */
  .steps__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Plans */
  .plans__grid {
    grid-template-columns: 1fr;
  }

  /* FAQ */
  .faq-wrap {
    max-width: 100%;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Notice — 縦積み */
  .notice {
    flex-direction: column;
    gap: 8px;
  }

  /* HUD装飾 — Mobileで控えめに */
  .hud-heading::before {
    height: calc(100% - 12px);
  }

  /* Card hover無効 */
  .card:hover {
    transform: none;
    box-shadow: none;
  }
}


/* ======================================================
   24. CLEAN PREMIUM OVERRIDES v4
   - 両プランを光らせる
   - 1年生だけ少し強め
   - FAQはdetails/summary前提
   ====================================================== */

:root {
  --color-bg: #0f1b31;
  --color-bg-alt: #13223b;
  --color-surface: #182842;
  --color-surface-hover: #1e3150;
  --color-border: #314766;
  --color-border-accent: #4d6c98;
  --color-text: #f2f6ff;
  --color-text-muted: #b3c0d7;
  --color-text-dim: #8292ae;
  --color-accent: #31d8ff;
  --color-accent-hover: #64e6ff;
  --color-accent-dim: rgba(49, 216, 255, 0.12);
  --color-accent-glow: rgba(49, 216, 255, 0.16);
  --card-radius: 14px;
  --btn-radius: 12px;
}

body {
  background:
    radial-gradient(circle at top center, rgba(49, 216, 255, 0.08), transparent 34%),
    linear-gradient(180deg, #0f1b31 0%, #11203a 100%);
}

a:visited { color: inherit; }
.text-dim:visited,
.footer__link:visited,
.notice a:visited,
.page-header__desc a:visited { color: var(--color-text-dim); }
.notice a,
.page-header__desc a { color: var(--color-accent); }
.notice a:hover,
.page-header__desc a:hover { color: var(--color-accent-hover); }

.header {
  background: rgba(15, 27, 49, 0.78);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 10px 30px rgba(0,0,0,0.16);
}
.mobile-nav { background: rgba(15, 27, 49, 0.96); }
.header__logo, .header__logo:visited { color: var(--color-text); }
.header__link, .header__link:visited { color: var(--color-text-muted); }
.header__link:hover { color: var(--color-text); }

.hero {
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(49,216,255,0.06), transparent 35%),
    linear-gradient(225deg, rgba(255,255,255,0.03), transparent 25%);
  pointer-events: none;
}
.hero__subtitle {
  color: var(--color-accent);
  letter-spacing: 0.14em;
  margin-bottom: 20px;
}
.hero__title {
  font-size: clamp(2.6rem, 7vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  text-wrap: balance;
}
.hero__desc {
  color: var(--color-text-muted);
  max-width: 32rem;
  font-size: 17px;
  line-height: 1.9;
}
.hero__shape {
  width: 260px;
  height: 260px;
  border-width: 2px;
  opacity: 0.86;
  box-shadow: 0 0 60px rgba(49,216,255,0.08);
}
.hero__shape::before { inset: 18px; }
.hero__shape::after { inset: 42px; }
.hero__glow {
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(49,216,255,0.16), transparent 62%);
  filter: blur(70px);
}

.card,
.notice,
.checklist,
.contact-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0)),
    var(--color-surface);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 12px 40px rgba(6, 14, 26, 0.14);
}
.card:hover {
  transform: translateY(-2px);
  border-color: rgba(49,216,255,0.24);
  box-shadow: 0 18px 50px rgba(6, 14, 26, 0.18);
}

.btn {
  min-height: 54px;
  border-radius: var(--btn-radius);
  font-weight: 800;
  letter-spacing: 0.02em;
}
.btn:visited { color: inherit; }
.btn-primary, .btn-primary:visited {
  color: #071320;
  background: linear-gradient(180deg, var(--color-accent) 0%, #26c3f0 100%);
  box-shadow: 0 12px 28px rgba(49,216,255,0.18);
}
.btn-primary:hover {
  color: #071320;
  background: linear-gradient(180deg, var(--color-accent-hover) 0%, var(--color-accent) 100%);
  box-shadow: 0 16px 34px rgba(49,216,255,0.22);
  transform: translateY(-1px);
}
.btn-secondary, .btn-secondary:visited {
  color: var(--color-text);
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(118, 159, 220, 0.38);
}
.btn-secondary:hover {
  color: var(--color-text);
  background: rgba(49,216,255,0.07);
  border-color: rgba(49,216,255,0.48);
}
.btn:disabled, .btn[aria-disabled="true"], .btn.is-disabled {
  opacity: 0.58;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
  transform: none;
}

.plan-card {
  gap: 0;
  position: relative;
}
.plan-card__header { margin-bottom: 24px; }
.plan-card__name { font-size: 22px; line-height: 1.25; }
.plan-card__price { font-size: 34px; }
.plan-card__features li {
  padding-block: 10px;
  color: var(--color-text-muted);
}

/* 両プラン共通の光り方 */
.card--highlight {
  border-color: rgba(49,216,255,0.34);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.03),
    0 12px 36px rgba(8,16,28,0.18),
    0 0 0 1px rgba(49,216,255,0.10);
}
.card--highlight::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, rgba(49,216,255,0.92) 28%, transparent 100%);
  border-top-left-radius: inherit;
  border-top-right-radius: inherit;
}
.card--highlight .hud-badge {
  border-color: rgba(49,216,255,0.24);
  background: rgba(49,216,255,0.10);
}

/* おすすめだけ少し強め */
.card--recommended {
  border-color: rgba(49,216,255,0.52);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.04),
    0 16px 42px rgba(8,16,28,0.22),
    0 0 0 1px rgba(49,216,255,0.16),
    0 0 28px rgba(49,216,255,0.10);
}
.card--recommended::before {
  background: linear-gradient(90deg, transparent 0%, rgba(49,216,255,1) 34%, transparent 100%);
}
.card--recommended .hud-badge {
  background: rgba(49,216,255,0.14);
}

.hud-badge {
  border-radius: 8px;
  padding: 8px 12px;
  border-color: rgba(49,216,255,0.22);
}
.hud-badge--warning {
  color: #ffb454;
  background: rgba(255,180,84,0.10);
  border-color: rgba(255,180,84,0.24);
}

.faq-item { border-bottom: 1px solid rgba(255,255,255,0.08); }
.faq-summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 22px 0;
  color: var(--color-text);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.7;
  cursor: pointer;
  list-style: none;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary:hover { color: var(--color-accent); }
.faq-summary__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 6px;
  color: var(--color-text-muted);
  transition: transform 180ms ease, color 180ms ease;
}
details.faq-item[open] .faq-summary__icon {
  transform: rotate(45deg);
  color: var(--color-accent);
}
.faq-answer { max-height: none; overflow: visible; }
.faq-answer__inner {
  padding: 0 0 24px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--color-text-muted);
}

.page-header {
  padding-top: calc(64px + 56px);
  padding-bottom: 28px;
}
.page-header__desc { color: var(--color-text-muted); }

.checklist__title,
.notice__title { color: #ffd089; }
.notice__text { color: var(--color-text-muted); }

.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer__link, .footer__link:visited { color: var(--color-text-dim); }
.footer__link:hover { color: var(--color-text); }

@media (max-width: 767px) {
  .hero__title { font-size: 52px; line-height: 1.06; }
  .hero__desc { font-size: 15px; line-height: 1.85; }
  .hero__shape { width: 210px; height: 210px; }
  .faq-summary { font-size: 16px; line-height: 1.75; padding: 20px 0; }
}