/* ========================================
   株式会社サンプル5 - Web3ベンチャー企業サイト
   編集: 色・フォント・背景画像はここで変更可能
   ======================================== */

:root {
  --color-bg: #0a0b0f;
  --color-bg-sub: #111318;
  --color-surface: #16181f;
  --color-border: #252830;
  --color-text: #e8eaed;
  --color-text-muted: #9ca3af;
  --color-accent: #00d4aa;
  --color-accent-hover: #00f0c0;
  --color-accent-dim: rgba(0, 212, 170, 0.15);
  --font-en: 'Outfit', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  --container: min(92%, 1120px);
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 11, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
  padding: 0;
}
.nav-toggle::before,
.nav-toggle::after {
  content: '';
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.2s;
}
.nav-toggle::before { top: 14px; }
.nav-toggle::after { bottom: 14px; }
.nav-toggle[aria-expanded="true"]::before {
  transform: translateY(5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"]::after {
  transform: translateY(-5px) rotate(-45deg);
}
.nav-list {
  display: flex;
  gap: 32px;
}
.nav-list a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s;
}
.nav-list a:hover,
.nav-list a.is-current { color: var(--color-accent); }

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: calc(var(--header-h) + 48px) 24px 48px;
  background: var(--color-bg)
    url("../images/hero-bg.svg") center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg,
    rgba(10, 11, 15, 0.92) 0%,
    rgba(0, 212, 170, 0.06) 50%,
    rgba(10, 11, 15, 0.95) 100%);
  pointer-events: none;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 20%, var(--color-accent-dim) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
}
.hero-label {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.hero-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.25;
  margin: 0 0 20px;
  letter-spacing: 0.02em;
}
.hero-lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin: 0 0 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  min-height: 48px;
  line-height: 1.2;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  cursor: pointer;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border: 2px solid var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-bg);
}
.btn-outline-light {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-text-muted);
}
.btn-outline-light:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.container {
  width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 80px 0;
}
.section-label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin: 0 0 20px;
  line-height: 1.35;
}
.section-lead {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin: 0 0 40px;
  max-width: 560px;
}

.section-about { background: var(--color-bg-sub); }
.about-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 28px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
.card-icon {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-accent);
  opacity: 0.9;
  margin-bottom: 12px;
}
.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 10px;
}
.card-text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0;
}

.section-cta {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  text-align: center;
}
.section-title-light { color: var(--color-text); }
.section-lead-light { color: var(--color-text-muted); margin-left: auto; margin-right: auto; }

.page-head {
  padding: calc(var(--header-h) + 80px) 0 60px;
  background: var(--color-bg-sub);
  border-bottom: 1px solid var(--color-border);
}
.page-head .container { max-width: var(--container); }
.page-title {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 8px;
}
.page-lead {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0;
}
.page-head-sub { padding-top: calc(var(--header-h) + 60px); }

.business-block {
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}
.business-block:last-of-type { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.company-dl {
  max-width: 560px;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px 24px;
  align-items: baseline;
}
.company-dl dt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}
.company-dl dd { margin: 0; font-size: 1rem; }

.message-content { max-width: 640px; }
.message-lead {
  font-size: 1.2rem;
  font-weight: 500;
  margin: 0 0 24px;
  color: var(--color-accent);
}
.message-body p { margin: 0 0 1em; }
.message-body p:last-child { margin-bottom: 0; }
.message-sign {
  margin-top: 32px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.contact-block { max-width: 520px; }
.contact-lead { margin: 0 0 16px; }
.contact-note {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 32px;
}
.contact-email-wrap {
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}
.contact-email-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 0 8px;
}
.contact-email {
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  word-break: break-all;
}
.contact-email:hover { color: var(--color-accent-hover); text-decoration: underline; }

.terms-content {
  max-width: 720px;
  font-size: 0.95rem;
}
.terms-content h2 {
  font-size: 1.35rem;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}
.terms-content h2:first-child { margin-top: 0; }
.terms-content h3 { font-size: 1.1rem; margin: 24px 0 12px; }
.terms-content ul { padding-left: 1.2em; margin: 0 0 1em; }
.terms-content li { list-style: disc; margin-bottom: 6px; }
.terms-content p { margin: 0 0 1em; }
.terms-update { margin-top: 32px; font-size: 0.85rem; color: var(--color-text-muted); }

.footer {
  padding: 48px 0 32px;
  background: var(--color-bg-sub);
  border-top: 1px solid var(--color-border);
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 0.95rem;
  margin: 0 0 16px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-links a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.footer-links a:hover { color: var(--color-accent); }
.footer-copy {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* ---------- タブレット（PCとスマホの中間） ---------- */
@media (max-width: 1024px) {
  .section { padding: 56px 0; }
  .page-head { padding: calc(var(--header-h) + 56px) 0 48px; }
  .about-cards { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
}

/* ---------- スマートフォン（PCと別レイアウト） ---------- */
@media (max-width: 768px) {
  :root { --header-h: 56px; }
  .header-inner { padding: 0 16px; }
  .logo { font-size: 0.95rem; }
  .nav-toggle {
    display: block;
    min-width: 44px;
    min-height: 44px;
  }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg-sub);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom, 0));
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s, opacity 0.2s;
  }
  .nav.is-open {
    max-height: 320px;
    opacity: 1;
  }
  .nav-list { flex-direction: column; gap: 0; }
  .nav-list li { border-bottom: 1px solid var(--color-border); }
  .nav-list a {
    display: flex;
    align-items: center;
    padding: 16px 0;
    min-height: 48px;
    line-height: 1.4;
    width: 100%;
  }
  .hero {
    padding: calc(var(--header-h) + 32px) 20px 40px;
    padding-bottom: calc(40px + env(safe-area-inset-bottom, 0));
  }
  .hero-title { font-size: clamp(1.5rem, 6vw, 2rem); margin-bottom: 16px; }
  .hero-lead { font-size: 0.95rem; margin-bottom: 28px; }
  .btn { min-height: 48px; padding: 16px 24px; }
  .container { padding: 0 20px; }
  .section { padding: 48px 0; }
  .section-lead { margin-bottom: 28px; }
  .section-title { font-size: clamp(1.4rem, 5vw, 1.75rem); }
  .card { padding: 20px; }
  .page-head {
    padding: calc(var(--header-h) + 48px) 0 40px;
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
  }
  .page-title { font-size: clamp(1.5rem, 5vw, 1.85rem); }
  .business-block { margin-bottom: 36px; padding-bottom: 36px; }
  .contact-email {
    font-size: 1rem;
    word-break: break-all;
    padding: 4px 0;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .contact-email-wrap { padding: 20px; }
  .footer {
    padding: 32px 16px 24px;
    padding-bottom: calc(24px + env(safe-area-inset-bottom, 0));
  }
  .footer-links { flex-direction: column; gap: 8px; }
  .company-dl {
    grid-template-columns: 1fr;
    gap: 4px 0;
  }
  .company-dl dt { margin-top: 16px; }
  .company-dl dt:first-child { margin-top: 0; }
}

/* ---------- 小型スマートフォン ---------- */
@media (max-width: 375px) {
  .hero { padding-left: 16px; padding-right: 16px; }
  .container { padding: 0 16px; }
  .btn { width: 100%; max-width: 280px; }
}