/* ===========================================================
   DX議員連盟 公式サイト スタイルシート
   Theme: Modern Black + Cyan accent
   =========================================================== */

:root {
  --bg: #050505;
  --bg-section: #0d0d0f;
  --bg-card: #14141a;
  --bg-elevated: #1a1a22;
  --border: #26262e;
  --border-strong: #3a3a44;
  --text: #ffffff;
  --text-sub: #b0b0bc;
  --text-mute: #7a7a86;
  --accent: #00d4ff;
  --accent-hover: #67e8f9;
  --accent-soft: rgba(0, 212, 255, 0.08);
  --gold: #fbbf24;
  --shadow: 0 12px 40px rgba(0, 212, 255, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.02em;
}

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

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

/* ---------- Layout ---------- */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 80px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  max-width: 1080px;
  margin: 0 auto;
}
.site-header .logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
}
.site-header .logo span { color: var(--accent); }
.site-header nav ul {
  display: flex;
  gap: 28px;
  list-style: none;
}
.site-header nav a {
  color: var(--text-sub);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
}
.site-header nav a:hover,
.site-header nav a.active { color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  padding: 120px 0 100px;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.12), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 212, 255, 0.06), transparent 50%),
    var(--bg);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hero .badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(32px, 5.5vw, 56px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero h1 .accent { color: var(--accent); }
.hero p.lead {
  font-size: clamp(15px, 1.8vw, 18px);
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto 40px;
}
.hero .cta {
  display: inline-flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.25);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---------- Section heading ---------- */
.section-title {
  text-align: center;
  margin-bottom: 56px;
}
.section-title .eyebrow {
  display: block;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 600;
}
.section-title h2 {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* ---------- Cards / grid ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-2px);
}
.card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--accent);
  font-weight: 700;
}
.card p {
  color: var(--text-sub);
  font-size: 15px;
}

/* ---------- Member card ---------- */
.member-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.2s, transform 0.2s;
}
.member-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-2px);
}
.member-card .photo {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-strong);
  margin-bottom: 12px;
  background: var(--bg-elevated);
  flex-shrink: 0;
}
.member-card .photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.member-card .photo-placeholder {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 2px dashed var(--border-strong);
  margin-bottom: 12px;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.member-card .role {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.15em;
  font-weight: 600;
  margin-bottom: 4px;
}
.member-card .name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.member-card .position {
  font-size: 14px;
  color: var(--text-sub);
}
.member-card .region {
  font-size: 13px;
  color: var(--text-mute);
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin-top: 8px;
}

/* ---------- Founder profile ---------- */
.founder-hero {
  display: grid;
  grid-template-columns: minmax(240px, 320px) 1fr;
  gap: 56px;
  align-items: center;
  padding: 80px 0 60px;
}
.founder-hero .photo {
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  background: var(--bg-card);
  overflow: hidden;
}
.founder-hero .meta .eyebrow {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.25em;
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
}
.founder-hero .meta h1 {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.founder-hero .meta .reading {
  font-size: 15px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}
.founder-hero .meta .titles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.founder-hero .meta .titles span {
  font-size: 12px;
  padding: 5px 12px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 4px;
  letter-spacing: 0.1em;
}
.founder-hero .meta p.bio-lead {
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.9;
}

@media (max-width: 768px) {
  .founder-hero {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
  .founder-hero .photo { max-width: 280px; margin: 0 auto; }
  .founder-hero .meta .titles { justify-content: center; }
}

/* ---------- Profile data table ---------- */
.profile-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.profile-table th,
.profile-table td {
  padding: 18px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.profile-table tr:last-child th,
.profile-table tr:last-child td { border-bottom: none; }
.profile-table th {
  width: 30%;
  background: var(--bg-elevated);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.profile-table td { color: var(--text-sub); }
@media (max-width: 600px) {
  .profile-table th, .profile-table td { display: block; width: 100%; }
  .profile-table th { padding-bottom: 4px; }
  .profile-table td { padding-top: 4px; padding-bottom: 16px; }
}

/* ---------- FAQ ---------- */
.faq {
  max-width: 820px;
  margin: 0 auto;
}
.faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq details[open] { border-color: rgba(0, 212, 255, 0.3); }
.faq summary {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "Q.";
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.05em;
}
.faq summary::after {
  content: "+";
  margin-left: auto;
  color: var(--accent);
  font-size: 22px;
  font-weight: 300;
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .answer {
  padding: 0 24px 22px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.9;
}
.faq .answer::before {
  content: "A. ";
  color: var(--accent);
  font-weight: 700;
}

/* ---------- Activity / list ---------- */
.activity-list {
  list-style: none;
  display: grid;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
}
.activity-list li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 18px 24px;
  border-radius: 6px;
  font-size: 15px;
  color: var(--text-sub);
}
.activity-list li strong { color: var(--text); display: block; margin-bottom: 4px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-section);
  padding: 56px 0 32px;
  text-align: center;
  border-top: 1px solid var(--border);
}
.site-footer .footer-nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 28px;
  flex-wrap: wrap;
  list-style: none;
}
.site-footer .footer-nav a {
  color: var(--text-sub);
  font-size: 14px;
}
.site-footer .copy {
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
}
.site-footer .domain {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-24 { margin-bottom: 24px; }
.divider {
  height: 1px;
  background: var(--border);
  margin: 56px 0;
}

/* small breakpoint */
@media (max-width: 640px) {
  section { padding: 56px 0; }
  .hero { padding: 80px 0 64px; }
  .site-header nav ul { gap: 16px; }
  .site-header nav a { font-size: 13px; }
  .site-header .logo { font-size: 16px; }
}