/* ═══════════════════════════════════════
   SpicaLABO — shared.css
   全ページ共通スタイル
   ═══════════════════════════════════════ */

/* ── Design Tokens ── */
:root {
  --color-bg:            #ffffff;
  --color-bg-alt:        #f5f8fb;
  --color-text:          #16212e;
  --color-muted:         #4d5d6f;
  --color-subtle:        #7d8a99;
  --color-accent:        #2e6cad;
  --color-accent-dark:   #1f4f85;
  --color-accent-bright: #5b9fe0;
  --color-cyan:          #3cc5dc;
  --color-navy:          #0b1220;
  --color-navy-2:        #182c4a;
  --grad-accent:         linear-gradient(135deg, var(--color-accent-bright), var(--color-cyan));
  --color-line:          #e4eaf1;
  --radius-card:         16px;
  --shadow-card:         0 1px 2px rgba(11,18,32,.04), 0 12px 28px rgba(11,18,32,.06);
  --shadow-card-hover:   0 2px 4px rgba(11,18,32,.06), 0 24px 48px rgba(46,108,173,.16);
  --font-display:        'Inter', 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
}

/* ── Reset & Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-display);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Navigation ── */
/* デフォルトは白背景（サブページ用）。トップページは index.html で上書き */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(255,255,255,.95);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  box-shadow: 0 1px 0 var(--color-line);
  color: var(--color-text);
}
.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--color-text);
  text-decoration: none;
}
.nav-logo span { color: var(--color-accent); margin-right: .25rem; }
.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  align-items: center;
  font-size: .85rem;
  letter-spacing: 0.04em;
}
/* 通常リンク: .nav-contact を除外することで詳細度を上げ !important 不要に */
.nav-links a:not(.nav-contact) {
  color: var(--color-text);
  opacity: .7;
  transition: opacity .2s;
  text-decoration: none;
}
.nav-links a:not(.nav-contact):hover {
  opacity: 1;
  color: var(--color-accent);
  text-decoration: none;
}
/* お問い合わせボタン */
.nav-contact {
  padding: .5rem 1.1rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  font-size: .8rem;
  letter-spacing: 0.04em;
  transition: background .2s;
  text-decoration: none;
  white-space: nowrap;
}
.nav-contact:hover {
  background: var(--color-accent-bright);
  color: #fff;
  text-decoration: none;
}

/* モバイルメニュー（CSSのみ・checkbox hack） */
.nav-toggle { display: none; }
.nav-burger { display: none; }
@media (max-width: 860px) {
  .nav-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
  }
  .nav-burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform .25s ease, opacity .25s ease;
  }
  .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #ffffff;
    box-shadow: 0 16px 32px rgba(11,18,32,.12);
    padding: .25rem 1.5rem 1rem;
    display: none;
  }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .nav-links a:not(.nav-contact) {
    display: block;
    padding: .9rem 0;
    color: var(--color-text);
    opacity: 1;
    border-bottom: 1px solid var(--color-line);
    font-size: .95rem;
  }
}

/* ── Footer ── */
footer {
  padding: 3rem 1.5rem 2.5rem;
  border-top: 1px solid var(--color-line);
  text-align: center;
  color: var(--color-subtle);
  font-size: .8rem;
}
.footer-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  padding: 0;
}
.footer-links a {
  color: var(--color-muted);
  transition: color .2s;
  text-decoration: none;
}
.footer-links a:hover { color: var(--color-accent); text-decoration: none; }

/* ── Page Header（サブページ共通） ── */
.page-header {
  padding: 8rem 1.5rem 4rem;
  text-align: center;
  border-bottom: 1px solid var(--color-line);
  background: linear-gradient(180deg, #f5f9fd 0%, #ffffff 100%);
}
.eyebrow, .section-eyebrow {
  font-size: .72rem;
  letter-spacing: 0.32em;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: .8rem;
}
.page-header h1 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.page-header h1 small {
  display: block;
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--color-subtle);
  margin-top: .6rem;
}
.page-lead {
  max-width: 580px;
  margin: 1.5rem auto 0;
  color: var(--color-muted);
  font-size: 1rem;
}

/* ── Section 共通 ── */
section { padding: 4.5rem 1.5rem; }
.section-inner, .container { max-width: 760px; margin: 0 auto; }
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 1.25rem;
}
.section-title::before {
  content: "";
  position: absolute;
  left: 0; top: .35rem;
  width: 4px; height: 1.5rem;
  background: var(--grad-accent);
  border-radius: 2px;
}
.lead { font-size: 1rem; color: var(--color-muted); margin-bottom: 1rem; }

/* ── 汎用ボタン ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: 1rem 2rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1rem;
  transition: transform .2s, box-shadow .2s, background .2s;
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(46,108,173,.4);
  background: var(--color-accent-bright);
  text-decoration: none;
  color: #fff;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: 1rem 2rem;
  background: transparent;
  color: inherit;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 1rem;
  opacity: .85;
  transition: opacity .2s, transform .2s;
  text-decoration: none;
}
.btn-ghost:hover { opacity: 1; transform: translateY(-2px); text-decoration: none; }

/* ── 実績数値（トップページ） ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem 1rem;
  text-align: center;
}
.stat-value {
  font-family: 'Inter', var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--color-navy);
  line-height: 1.2;
}
.stat-value small {
  font-size: .55em;
  font-weight: 700;
  margin-left: .1em;
}
.stat-label {
  margin-top: .35rem;
  font-size: .78rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
}
@media (max-width: 700px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── 代表プロフィールカード ── */
.founder-card {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding: 2rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: #fff;
  box-shadow: var(--shadow-card);
}
/* モノグラム。顔写真支給時は中に <img> を入れるだけで差し替え可能 */
.founder-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-2) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  overflow: hidden;
}
.founder-avatar .avatar-star { color: var(--color-cyan); font-size: .9rem; margin-right: .15rem; }
.founder-avatar img { width: 100%; height: 100%; object-fit: cover; }
.founder-name { font-size: 1.15rem; font-weight: 700; letter-spacing: 0.04em; }
.founder-name small {
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--color-subtle);
  margin-left: .6rem;
  text-transform: uppercase;
}
.founder-bio { font-size: .9rem; color: var(--color-muted); margin-top: .4rem; }
.founder-link {
  display: inline-block;
  margin-top: .6rem;
  font-size: .85rem;
  font-weight: 600;
}
@media (max-width: 600px) {
  .founder-card { flex-direction: column; text-align: center; }
}

/* ── 提供形態カード（AI顧問・Web開発支援） ── */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
.plan {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: #fff;
  box-shadow: var(--shadow-card);
}
.plan.is-featured { border-color: var(--color-accent); }
.plan-badge {
  align-self: flex-start;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--color-accent);
  border-radius: 999px;
  padding: .15rem .7rem;
  margin-bottom: .6rem;
}
.plan-name { font-size: 1rem; font-weight: 700; letter-spacing: 0.04em; }
.plan-for { font-size: .8rem; color: var(--color-subtle); margin-top: .15rem; }
.plan-desc { font-size: .88rem; color: var(--color-muted); margin-top: .75rem; flex-grow: 1; }
.plan-price {
  margin-top: 1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--color-line);
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-text);
}
@media (max-width: 700px) {
  .plans-grid { grid-template-columns: 1fr; }
}

/* ── FAQ（details/summary・JS不要） ── */
.faq-list { margin-top: .5rem; }
.faq-item { border-bottom: 1px solid var(--color-line); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 1.15rem 2.25rem 1.15rem 0;
  font-size: .98rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: .25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform .2s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-a {
  padding: 0 .25rem 1.25rem 0;
  font-size: .92rem;
  color: var(--color-muted);
}

/* ── こんな企業に（AI顧問・Web開発支援で共用） ── */
.audience { background: var(--color-bg-alt); }
.audience-list { list-style: none; }
.audience-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-line);
  font-size: .95rem;
  color: var(--color-text);
  display: flex;
  align-items: flex-start;
  gap: .75rem;
}
.audience-list li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ── 提供内容グリッド（AI顧問・Web開発支援で共用） ── */
.offerings-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
.offering {
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow-card);
}
.offering-icon { font-size: 1.5rem; margin-bottom: .5rem; line-height: 1; }
.offering-title { font-size: .98rem; font-weight: 700; letter-spacing: 0.04em; margin-bottom: .4rem; }
.offering-desc { font-size: .88rem; color: var(--color-muted); }

/* ── 技術スタックチップ（Web開発支援） ── */
.stack { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1rem; }
.stack-chip {
  font-size: .78rem;
  padding: .35rem .8rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

/* ── ご利用の流れ（AI顧問・Web開発支援で共用） ── */
.flow { background: var(--color-bg-alt); }
.flow-list { list-style: none; counter-reset: step; }
.flow-list li {
  padding: 1.25rem 0 1.25rem 3.5rem;
  border-bottom: 1px solid var(--color-line);
  position: relative;
  counter-increment: step;
}
.flow-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 1.3rem;
  font-size: .75rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.06em;
}
.flow-step-title { font-size: 1rem; font-weight: 700; letter-spacing: 0.04em; margin-bottom: .2rem; }
.flow-step-desc { font-size: .9rem; color: var(--color-muted); }

/* ── ダーク CTA セクション（全ページ共用） ── */
.cta-dark {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-2) 100%);
  color: #fff;
  text-align: center;
}
.cta-dark .section-title { color: #fff; }
.cta-dark .section-title::before { background: var(--grad-accent); }
.cta-dark .cta-text {
  font-size: 1rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 2rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.cta-dark .cta-btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: 1rem 2rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1rem;
  transition: transform .2s, box-shadow .2s, background .2s;
  text-decoration: none;
}
.cta-dark .cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(46,108,173,.4);
  background: var(--color-accent-bright);
  text-decoration: none;
  color: #fff;
}
.cta-note {
  margin-top: 1.5rem;
  font-size: .8rem;
  color: rgba(255,255,255,.6);
}

/* ── フェードアップ（トップページで使用） ── */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .8s ease, transform .8s ease;
}
.fade-up.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; transition: none; }
}

/* ── Responsive ── */
@media (max-width: 600px) {
  section { padding: 3rem 1.25rem; }
  .page-header { padding: 5.5rem 1.25rem 3rem; }
  .offerings-grid { grid-template-columns: 1fr; }
}