/* 明鏡アプリLP — 方向宣言(要約)
   レジスター: 主=静謐 副=精密(アプリ正典 meikyo-app/DESIGN_DIRECTION.md の移植)
   パレット: 地#e9f0f9 面#f6f9fd 墨#0b1424 水#0369a1(リンク/チップのみ)
             金#b7791f(細線の飾りのみ・面に塗らない) ヘアライン#d0dff0
   タイポ: display=Shippori Mincho B1(600) body=Zen Kaku Gothic New
   シグネチャー: 額装(動画・スクショは紙カードの余白の中に収める)
   禁じ手: 紙吹雪/グラデスープ/同型3カード/CTA乱立(DL 1種のみ) */

:root {
  --bg: #e9f0f9;
  --paper: #f6f9fd;
  --sumi: #0b1424;
  --sumi-2: rgba(11, 20, 36, 0.66);
  --mizu: #0369a1;
  --kin: #b7791f;
  --hairline: #d0dff0;
  --shadow: 0 1px 2px rgba(11, 20, 36, 0.08), 0 12px 24px rgba(11, 20, 36, 0.1);
  --mincho: "Shippori Mincho B1", "Hiragino Mincho ProN", serif;
  --gothic: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--sumi);
  font-family: var(--gothic);
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--mizu); }

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- ナビ ---- */
.site-nav {
  max-width: 1040px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--sumi);
  font-family: var(--mincho);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: 0.14em;
}

.brand img { border-radius: 9px; }

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  color: var(--sumi-2);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 2px;
}

.nav-links a:hover { color: var(--sumi); }

/* ---- ヒーロー ---- */
.hero-grid {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 20px 88px;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--mizu);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.12em;
}

h1 {
  margin: 0 0 20px;
  font-family: var(--mincho);
  font-weight: 600;
  font-size: clamp(56px, 9vw, 88px);
  letter-spacing: 0.22em;
  line-height: 1.1;
}

.lead {
  margin: 0 0 32px;
  max-width: 30em;
  font-size: 16px;
  color: var(--sumi);
}

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

.store-button {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 176px;
  padding: 12px 26px 14px;
  background: var(--sumi);
  color: var(--paper);
  text-decoration: none;
  border-radius: 14px;
  line-height: 1.35;
  transition: transform 200ms ease-out, box-shadow 200ms ease-out;
}

.store-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.store-button:focus-visible {
  outline: 3px solid var(--mizu);
  outline-offset: 3px;
}

.store-kicker {
  font-size: 11px;
  color: rgba(246, 249, 253, 0.72);
  letter-spacing: 0.08em;
}

.store-button span:last-child {
  font-family: var(--mincho);
  font-weight: 600;
  font-size: 20px;
}

.hero-note {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--sumi-2);
}

/* ---- 額装(シグネチャー): 実物は紙カードの余白の中に ---- */
.framed {
  margin: 0;
  background: var(--paper);
  border-radius: 20px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.framed video,
.framed img {
  border-radius: 10px;
}

.framed figcaption {
  padding: 10px 4px 2px;
  text-align: center;
  font-size: 13px;
  color: var(--sumi-2);
}

/* ---- セクション共通 ---- */
section { padding: 88px 0; }

.section-title {
  margin: 0 0 16px;
  font-family: var(--mincho);
  font-weight: 600;
  font-size: clamp(26px, 4.2vw, 36px);
  letter-spacing: 0.06em;
  line-height: 1.4;
}

.section-title::after {
  content: "";
  display: block;
  width: 72px;
  height: 2px;
  margin-top: 18px;
  background: var(--kin);
}

/* ---- 特徴 ---- */
.features { background: var(--paper); }

.features .section-title { margin-bottom: 48px; }

.feature h3 {
  margin: 0 0 10px;
  font-family: var(--mincho);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.04em;
}

.feature p {
  margin: 0;
  max-width: 34em;
  color: var(--sumi-2);
  font-size: 15px;
}

.feature-wide {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 48px;
}

.topic-chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.topic-chips li {
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--sumi);
}

.feature-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
}

/* ---- 画面 ---- */
.screens .section-title { margin-bottom: 48px; }

.screen-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.screen-card img {
  border: 1px solid var(--hairline);
}

/* ---- FAQ ---- */
.faq { background: var(--paper); }

.faq .section-title { margin-bottom: 32px; }

.faq details {
  border-bottom: 1px solid var(--hairline);
  padding: 4px 0;
}

.faq summary {
  cursor: pointer;
  padding: 16px 8px;
  font-weight: 500;
  font-size: 16px;
  list-style-position: outside;
}

.faq summary:hover { color: var(--mizu); }

.faq details p {
  margin: 0;
  padding: 0 8px 20px;
  color: var(--sumi-2);
  font-size: 15px;
  max-width: 40em;
}

/* ---- 締めCTA ---- */
.closing { text-align: center; }

.closing-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.closing-icon {
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.closing h2 {
  margin: 0;
  font-family: var(--mincho);
  font-weight: 600;
  font-size: clamp(24px, 4vw, 32px);
  letter-spacing: 0.08em;
}

.closing .cta-row { justify-content: center; }

/* ---- フッター ---- */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 40px 0 56px;
}

.footer-inner {
  font-size: 13px;
  color: var(--sumi-2);
}

.footer-inner p { margin: 0 0 8px; }

.footer-quiet a { color: var(--sumi-2); }

/* ---- レスポンシブ ---- */
@media (max-width: 880px) {
  .hero-grid {
    padding-top: 24px;
    padding-bottom: 64px;
    gap: 40px;
  }

  .feature-wide,
  .feature-pair {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  section { padding: 64px 0; }

  .screen-row {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 72%;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 12px;
    -webkit-overflow-scrolling: touch;
  }

  .screen-card { scroll-snap-align: center; }
}

@media (max-width: 520px) {
  .nav-links { display: none; }

  .cta-row { flex-direction: column; }

  .store-button { align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .store-button { transition: none; }
}