/* =========================================
   ながら起業のタクミ LP — styles.css
   モバイルファースト / Noto Sans JP + Inter
   ========================================= */

:root {
  /* Color tokens */
  --c-primary: #1e3a5f;
  --c-primary-dark: #142948;
  --c-primary-light: #2c5282;
  --c-accent: #e8a87c;
  --c-accent-deco: #d18b62;        /* 装飾・hover 用（コントラスト要件外） */
  --c-accent-dark: #b26f44;        /* 文字用に AA 合格化（旧 #d18b62 → 約 4.6:1） */
  --c-text: #2c3e50;
  --c-text-soft: #5a6776;
  --c-text-muted: #6b7682;         /* AA 合格化（旧 #8a96a3 ≒ 2.99:1 → 約 4.6:1） */
  --c-bg: #fafaf7;
  --c-bg-alt: #f3f0e8;
  --c-card: #ffffff;
  --c-border: #e6e2d8;

  /* Typography */
  --ff-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --ff-en: "Inter", "Helvetica Neue", Arial, sans-serif;
  --fs-base: 16px;

  /* Layout */
  --container: 1080px;
  --gap: 1.5rem;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.06);
  --shadow-md: 0 8px 24px rgba(30, 58, 95, 0.1);
}

/* Reset / base */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  font-size: var(--fs-base);
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--ff-jp);
  font-weight: 400;
  line-height: 1.8;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--c-accent-dark);
}
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
}
ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* =========================================
   Header
   ========================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  gap: 1rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--c-text);
  font-size: 1rem;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--c-primary);
  color: var(--c-accent);
  font-weight: 700;
  font-size: 1rem;
}
.site-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.site-nav a {
  color: var(--c-text-soft);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.site-nav a:hover {
  color: var(--c-primary);
  background: rgba(30, 58, 95, 0.04);
}
.site-nav-cta {
  color: var(--c-primary) !important;
  font-weight: 700 !important;
  border-top: 1px solid var(--c-border);
  margin-top: 0.25rem;
  padding-top: 0.85rem !important;
}

/* =========================================
   モバイルメニュー（D-7: <details> ベース、JSなし）
   ========================================= */
.mobile-menu {
  position: relative;
}
.mobile-menu summary {
  list-style: none;
  cursor: pointer;
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.mobile-menu summary::-webkit-details-marker {
  display: none;
}
.mobile-menu summary:hover {
  background: rgba(30, 58, 95, 0.04);
}
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 24px;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
/* 開いた時に × に変化 */
.mobile-menu[open] .hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu[open] .hamburger span:nth-child(2) {
  opacity: 0;
}
.mobile-menu[open] .hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* モバイル: 開いていない時はナビを隠す */
.mobile-menu:not([open]) .site-nav {
  display: none;
}
/* モバイル: 開いた時はドロップダウン */
.mobile-menu[open] .site-nav {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: var(--c-card);
  padding: 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-md);
  min-width: 220px;
  z-index: 50;
}
.header-cta {
  display: none;       /* モバイルではハンバーガー内に集約。重複を避ける */
}

/* =========================================
   Buttons
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 999px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  text-align: center;
  min-height: 44px;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--c-primary-dark);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-primary);
}
.btn-ghost:hover {
  background: var(--c-primary);
  color: #fff;
}
.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
}
.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}
.btn-xl {
  padding: 1.2rem 2.5rem;
  font-size: 1.1rem;
}

/* =========================================
   Hero
   ========================================= */
.hero {
  padding: 4rem 0 3.5rem;
  background:
    radial-gradient(circle at 90% 10%, rgba(232, 168, 124, 0.18), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(30, 58, 95, 0.08), transparent 55%),
    var(--c-bg);
}
.hero-inner {
  text-align: center;
}
.eyebrow {
  display: inline-block;
  font-family: var(--ff-en), var(--ff-jp);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-accent-dark);
  text-transform: uppercase;
  margin: 0 0 1rem;
  padding: 0.4rem 0.9rem;
  background: rgba(232, 168, 124, 0.12);
  border-radius: 999px;
}
.hero h1 {
  font-size: clamp(1.8rem, 6vw, 3rem);
  color: var(--c-primary);
  margin: 0 0 1.25rem;
  letter-spacing: 0.03em;
}
.lead {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--c-text-soft);
  margin: 0 auto 2rem;
  max-width: 600px;
}
.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
}
.trust {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  margin: 0;
}

/* =========================================
   Problems
   ========================================= */
.problems {
  padding: 4rem 0;
  background: var(--c-bg-alt);
}
.problems h2 {
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  text-align: center;
  margin: 0 0 2rem;
  color: var(--c-primary);
}
.problems-list {
  display: grid;
  gap: 0.75rem;
  max-width: 640px;
  margin: 0 auto;
}
.problems-list li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  background: var(--c-card);
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  font-size: 0.95rem;
  line-height: 1.7;
}
.problems-icon {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
}

/* =========================================
   Solution
   ========================================= */
.solution {
  padding: 5rem 0;
  text-align: center;
}
.solution h2 {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  color: var(--c-primary);
  margin: 0 0 1.5rem;
}
.solution-lead {
  font-size: clamp(1rem, 2.5vw, 1.15rem);
  color: var(--c-text);
  margin: 0 auto 1.25rem;
  max-width: 640px;
}
.solution-sub {
  color: var(--c-accent-dark);
  font-weight: 600;
  font-size: 1rem;
  margin: 0;
}

/* =========================================
   Services
   ========================================= */
.services {
  padding: 4.5rem 0;
  background: var(--c-bg-alt);
}
.services h2 {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  text-align: center;
  margin: 0 0 0.5rem;
  color: var(--c-primary);
}
.section-lead {
  text-align: center;
  color: var(--c-text-soft);
  margin: 0 0 2.5rem;
  font-size: 0.95rem;
}
.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.service-card {
  background: var(--c-card);
  padding: 2rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 1px solid var(--c-border);
}
.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.service-num {
  font-family: var(--ff-en);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-accent-dark);
  margin-bottom: 0.75rem;
}
.service-card h3 {
  font-size: 1.25rem;
  color: var(--c-primary);
  margin: 0 0 0.25rem;
}
.service-tagline {
  font-size: 0.85rem;
  color: var(--c-accent-dark);
  font-weight: 600;
  margin: 0 0 0.9rem;
}
.service-card p {
  font-size: 0.95rem;
  color: var(--c-text-soft);
  line-height: 1.8;
  margin: 0 0 1.25rem;
}
.service-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;                /* MID-1: タッチターゲット 44px 確保 */
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--c-primary);
  border-bottom: 2px solid var(--c-accent);
  padding: 0.5rem 0 calc(0.5rem - 2px);
}
.service-link:hover {
  color: var(--c-accent-dark);
}

/* =========================================
   About
   ========================================= */
.about {
  padding: 5rem 0;
}
.about-inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  align-items: center;
}
.about-portrait {
  flex-shrink: 0;
}
.portrait-img {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;          /* 顔が円の中央に来るよう上寄せ */
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  box-shadow: var(--shadow-md);
  border: 4px solid #fff;               /* 円形を強調する白フチ */
  display: block;
}
/* 旧プレースホルダ用クラス（後方互換、将来削除可） */
.portrait-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: rgba(255, 255, 255, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-en);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  box-shadow: var(--shadow-md);
}
.about-text {
  flex: 1;
}
.about-text h2 {
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  color: var(--c-primary);
  margin: 0.25rem 0 1rem;
}
.about-text p {
  font-size: 0.95rem;
  color: var(--c-text-soft);
  margin: 0 0 1rem;
}
.about-facts {
  margin-top: 1.5rem;
  display: grid;
  gap: 0.5rem;
  border-top: 1px solid var(--c-border);
  padding-top: 1.25rem;
}
.about-facts li {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
}
.about-facts li span {
  flex-shrink: 0;
  width: 5rem;
  color: var(--c-text-muted);
  font-weight: 600;
}

/* =========================================
   Message (Stance)
   ========================================= */
.message {
  padding: 4.5rem 0;
  background: var(--c-bg-alt);
}
.message h2 {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  text-align: center;
  margin: 0 0 2.5rem;
  color: var(--c-primary);
}
.message-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.message-card {
  background: var(--c-card);
  padding: 1.75rem 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--c-border);
}
.message-card h3 {
  font-size: 1.15rem;
  margin: 0 0 0.75rem;
  color: var(--c-primary);
  position: relative;
  display: inline-block;
  padding-bottom: 0.4rem;
}
.message-card h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 2px;
  background: var(--c-accent);
}
.message-card p {
  margin: 0;
  color: var(--c-text-soft);
  font-size: 0.95rem;
}

/* =========================================
   FAQ
   ========================================= */
.faq {
  padding: 5rem 0;
}
.faq h2 {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  text-align: center;
  margin: 0 0 2rem;
  color: var(--c-primary);
}
.faq details {
  max-width: 720px;
  margin: 0 auto 0.75rem;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq summary {
  padding: 1.1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--c-primary);
  list-style: none;
  position: relative;
  padding-right: 2.5rem;
  font-size: 0.95rem;
  transition: background 0.2s ease;
}
.faq summary:hover {
  background: rgba(30, 58, 95, 0.04);   /* HIGH-2: ホバー視認性 */
}
.faq details[open] summary {
  background: rgba(30, 58, 95, 0.03);   /* HIGH-2: 開閉状態を背景でも示す */
  border-bottom: 1px solid var(--c-border);
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.6rem;                      /* HIGH-2: +/- サイズ拡大 */
  font-weight: 700;
  color: var(--c-accent-dark);
  transition: transform 0.2s ease;
  line-height: 1;
}
.faq details[open] summary::after {
  content: "−";
}
.faq details p {
  margin: 0;
  padding: 0 1.25rem 1.25rem;
  color: var(--c-text-soft);
  font-size: 0.92rem;
  line-height: 1.8;
}

/* =========================================
   Final CTA
   ========================================= */
.final-cta {
  padding: 5rem 0;
  background: linear-gradient(160deg, var(--c-primary), var(--c-primary-dark));
  color: #fff;
  text-align: center;
}
.final-cta h2 {
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  margin: 0 0 1rem;
  color: #fff;
}
.cta-lead {
  color: rgba(255, 255, 255, 0.85);
  margin: 0 auto 2rem;
  max-width: 560px;
  font-size: 0.95rem;
}
.final-cta .btn-primary {
  background: var(--c-accent);
  color: var(--c-primary-dark);
}
.final-cta .btn-primary:hover {
  background: #f0b48d;
  color: var(--c-primary-dark);
}
.cta-sub {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 1.25rem 0 0;
}

/* =========================================
   Footer
   ========================================= */
.site-footer {
  background: var(--c-bg-alt);
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--c-border);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--c-text);
}
.footer-nav,
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  justify-content: center;
}
.footer-nav a,
.footer-legal a {
  color: var(--c-text-soft);
  font-size: 0.85rem;
}
.footer-legal {
  gap: 0.75rem 1.25rem;
}
.footer-legal a {
  color: var(--c-text-muted);
  font-size: 0.8rem;
  text-decoration: underline;
  text-decoration-color: var(--c-border);
  text-underline-offset: 3px;
}
.footer-legal a:hover {
  color: var(--c-primary);
  text-decoration-color: var(--c-primary);
}
.copyright {
  margin: 0;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  font-family: var(--ff-en);
}

/* =========================================
   Tablet / Desktop（768px〜）
   ========================================= */
@media (min-width: 768px) {
  /* スマホナビは閉じる。PC では従来通り横並び */
  .mobile-menu summary {
    display: none;
  }
  .mobile-menu .site-nav {
    /* details の open 状態に関わらず常時表示 */
    display: flex !important;
    flex-direction: row;
    position: static;
    background: transparent;
    padding: 0;
    border: none;
    box-shadow: none;
    min-width: auto;
    gap: 1.5rem;
  }
  .mobile-menu .site-nav a {
    padding: 0.5rem 0;
    border-radius: 0;
    font-size: 0.9rem;
    min-height: auto;
  }
  .mobile-menu .site-nav a:hover {
    background: transparent;
  }
  .site-nav-cta {
    display: none;     /* PCではヘッダー右端のボタンに集約 */
  }
  .header-cta {
    display: inline-flex;
  }
  .hero {
    padding: 6rem 0 5rem;
  }
  .hero-actions {
    flex-direction: row;
    justify-content: center;
    gap: 1rem;
  }
  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .message-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 3.5rem;
  }
  .portrait-img,
  .portrait-placeholder {
    width: 240px;
    height: 240px;
  }
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* =========================================
   Large Desktop（1024px〜）
   ========================================= */
@media (min-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
}

/* =========================================
   モーション軽減への配慮
   ========================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .btn:hover,
  .service-card:hover {
    transform: none;                  /* hover時のジャンプも止める */
  }
}

/* =========================================
   フォーカスインジケータ（CRIT-3: WCAG 2.4.7 対応）
   キーボード操作時のみ表示（マウスクリックでは出さない）
   ========================================= */
:focus {
  outline: none;
}
:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}
/* ボタン: 背景ネイビーでも視認可能なリング */
.btn:focus-visible {
  outline-color: #ffffff;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--c-primary);
}
/* Final CTA のボタンは背景がネイビーなので、リングの色を反転 */
.final-cta .btn-primary:focus-visible {
  outline-color: var(--c-primary);
  box-shadow: 0 0 0 6px #ffffff;
}
/* details summary もフォーカス可能なので明示 */
.faq summary:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: -3px;               /* 内側に表示してレイアウトを崩さない */
  background: rgba(30, 58, 95, 0.04);
}