/* 地と強調はアイコン (design/icon.svg) の藍と空色から取る。
   席を外していた間の帯は、アプリの履歴の帯と同じく青紫に寄せ、ほかの通知と見分ける */
:root {
  --paper: #f2f5f9;
  --card: #ffffff;
  --ink: #121a26;
  --muted: #3d4a5c;
  --faint: #5b6878;
  --line: #c9d4e2;
  --brand: #1f3a5f;
  --on-brand: #ffffff;
  --brand-muted: #d3deec;
  --away: #e4e9f7;
  --away-ink: #33417a;
  --link: #1f3a5f;
  font-family: "Zen Kaku Gothic New", "Yu Gothic UI", Meiryo, system-ui, sans-serif;
  /* 和文の約物の空きを詰め、見出しの字間を揃える */
  font-feature-settings: "palt";
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f151e;
    --card: #18212d;
    --ink: #e6ebf2;
    --muted: #b3bdca;
    --faint: #94a0af;
    --line: #2b3747;
    --brand: #7fb3e6;
    --on-brand: #0f151e;
    --brand-muted: #b3bdca;
    --away: #1f2742;
    --away-ink: #bcc6f2;
    --link: #9cc5ee;
  }
  /* 暗い地では、藍の帯は空色にせず、地より一段明るい面にする */
  .facts {
    --band-bg: #16263c;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.8;
}
a {
  color: var(--link);
}
:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
h1,
h2,
h3 {
  line-height: 1.3;
  font-weight: 900;
}

.bar {
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: center;
  justify-content: space-between;
}
.bar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
}
.bar nav a {
  color: var(--muted);
  text-decoration: none;
}
.bar nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}
footer.bar {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.cta {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 0 28px;
  border-radius: 10px;
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 700;
  font-size: 17px;
  text-decoration: none;
}
.cta:hover {
  filter: brightness(1.12);
}

/* トップ */
.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 32px 96px;
  display: flex;
  flex-wrap: wrap;
  gap: 64px;
  align-items: center;
}
.hero-copy {
  flex: 1 1 420px;
  min-width: 0;
}
.hero h1 {
  margin: 0;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.18;
  letter-spacing: -0.01em;
}
.lead {
  margin: 28px 0 0;
  max-width: 28em;
  font-size: 19px;
  color: var(--muted);
}
.cta-row {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  color: var(--muted);
  font-size: 15px;
}

/* タイムラインの見本。左に時刻、縦の線、右に通知を並べる */
.timeline {
  flex: 1 1 460px;
  min-width: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 71px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}
.tl-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}
.tl-row time {
  padding-top: 12px;
  text-align: right;
  font-size: 14px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.toast {
  position: relative;
  background: var(--card);
  border-radius: 10px;
  padding: 10px 16px;
  box-shadow: 0 1px 2px rgba(18, 26, 38, 0.08);
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}
.toast strong {
  font-size: 15px;
}
.toast span {
  font-size: 14px;
  color: var(--muted);
}
.toast .toast-app {
  font-size: 13px;
  color: var(--faint);
}
.tl-away {
  position: relative;
  margin-left: 64px;
  padding: 16px;
  border-radius: 14px;
  background: var(--away);
  color: var(--away-ink);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
}
.tl-away > strong {
  font-size: 14px;
}
.tl-stopped {
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--faint);
  background: var(--paper);
  position: relative;
}

.section-title {
  margin: 0;
  font-size: 32px;
}

/* 機能。文と画面を 1 行ずつ、左右を入れ替えて並べる */
.features {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 32px 64px;
}
.feature {
  margin-top: 56px;
  display: flex;
  flex-wrap: wrap;
  gap: 32px 56px;
  align-items: center;
}
.feature:nth-of-type(even) {
  flex-direction: row-reverse;
}
.feature-copy {
  flex: 1 1 300px;
  min-width: 0;
}
.feature h3 {
  margin: 0;
  font-size: clamp(24px, 3vw, 30px);
}
.feature p {
  margin: 16px 0 0;
  font-size: 17px;
  color: var(--muted);
}
.feature img {
  flex: 2 1 560px;
  min-width: 0;
  border-radius: 12px;
  box-shadow:
    0 0 0 1px var(--line),
    0 16px 40px rgba(18, 26, 38, 0.14);
}
/* 最近の通知は縦長の小さな窓なので、窓の大きさに近い幅で見せる */
.feature-panel img {
  flex: 0 1 360px;
}

/* 買う前に気になることを、藍の帯に一行で並べる */
.facts {
  background: var(--band-bg, #1f3a5f);
  color: #ffffff;
}
.facts ul {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 32px;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 16px 32px;
  font-size: 18px;
  font-weight: 700;
}
.facts li {
  padding-left: 16px;
  border-left: 3px solid #7fb3e6;
}

.faq {
  max-width: 760px;
  margin: 0 auto;
  padding: 96px 32px 0;
}
.faq dl {
  margin: 24px 0 0;
  border-top: 1px solid var(--line);
}
.faq dt {
  padding-top: 20px;
  font-size: 18px;
  font-weight: 700;
}
.faq dd {
  margin: 4px 0 0;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.closing {
  max-width: 1120px;
  margin: 0 auto;
  padding: 96px 32px 0;
  text-align: center;
}
.closing h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
}
.closing p {
  margin: 16px 0 28px;
  color: var(--muted);
  font-size: 17px;
}

.help {
  max-width: 1120px;
  margin: 0 auto;
  padding: 96px 32px 64px;
}
.help h2 {
  margin: 0;
  font-size: 32px;
}

/* ガイドの一覧。トップでは 2 列、記事の下と一覧のページでは 1 列 */
.guide-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  column-gap: 48px;
}
.doc .guide-list {
  grid-template-columns: minmax(0, 1fr);
}
.guide-list li {
  border-bottom: 1px solid var(--line);
}
.guide-list li > a {
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  color: var(--ink);
  text-decoration: none;
}
.guide-list strong {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
}
.guide-list span {
  margin-top: 4px;
  font-size: 15px;
  color: var(--faint);
}
.guide-list a:hover strong {
  text-decoration: underline;
}

/* ガイドとプライバシーポリシー */
.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 32px 0;
}
.doc h1 {
  margin: 16px 0 0;
  font-size: clamp(28px, 4vw, 36px);
}
.doc article h2 {
  margin-top: 48px;
  font-size: 24px;
}
.doc section h2 {
  margin-top: 64px;
  font-size: 22px;
}
.doc code {
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--card);
  box-shadow: 0 0 0 1px var(--line);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}
.crumbs,
.meta {
  color: var(--faint);
  font-size: 14px;
}
.app-box {
  margin-top: 56px;
  padding: 24px;
  border-radius: 14px;
  background: var(--card);
  box-shadow: 0 0 0 1px var(--line);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.app-box p {
  margin: 4px 0 16px;
  color: var(--muted);
}