:root {
  --bg: #fdfdfd;
  --fg: #1a1d23;
  --muted: #5a6273;
  --accent: #1f6feb;
  --accent-hover: #1158c7;
  --card-bg: #ffffff;
  --card-border: #e4e7ec;
  --ok: #2da44e;
  --soon: #bf8700;
  --code-bg: #f1f3f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --card-bg: #161b22;
    --card-border: #30363d;
    --code-bg: #21262d;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 56px;
  text-align: center;
  border-bottom: 1px solid var(--card-border);
}
.hero .logo {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}
.hero h1 {
  margin: 16px 0 4px;
  font-size: 3rem;
  letter-spacing: -0.02em;
}
.tagline {
  font-size: 1.25rem;
  color: var(--muted);
  margin: 0 0 24px;
}
.lede {
  max-width: 640px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
}
.platforms {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
}
.platforms span {
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 4px 12px;
}
.cta { margin: 0; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  margin: 0 6px;
  border: 1.5px solid transparent;
}
.btn.primary {
  background: var(--accent);
  color: #fff;
}
.btn.primary:hover { background: var(--accent-hover); color: #fff; text-decoration: none; }
.btn.ghost {
  background: transparent;
  border-color: var(--card-border);
  color: var(--fg);
}
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
/* ---------- Language switch ---------- */
.lang-switch {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 100;
  display: flex;
  gap: 4px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  line-height: 1;
}
.lang-switch button:hover { color: var(--fg); }
.lang-switch button.active {
  background: var(--accent);
  color: #fff;
}

.lang-content { display: none; }
html[data-lang="ja"] .lang-content[lang="ja"] { display: block; }
html[data-lang="en"] .lang-content[lang="en"] { display: block; }

/* ---------- Sections ---------- */
section {
  padding: 56px 0;
  border-bottom: 1px solid var(--card-border);
}
section h2 {
  font-size: 1.7rem;
  margin: 0 0 28px;
  letter-spacing: -0.01em;
}

/* ---------- Feature grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 20px;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}
.card p { margin: 0; color: var(--muted); }

/* ---------- Gallery ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}
.gallery img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--card-border);
}
.shot-group {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--muted);
  margin: 28px 0 14px;
}
.shot-group:first-of-type { margin-top: 0; }
.gallery-desktop {
  grid-template-columns: 1fr;
  max-width: 760px;
}
.shot-placeholder {
  border: 1px dashed var(--card-border);
  border-radius: 8px;
  padding: 56px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
  background: var(--card-bg);
}

/* ---------- Checklist ---------- */
.checklist {
  list-style: none;
  padding: 0;
  margin: 0;
}
.checklist li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--card-border);
}
.checklist li:last-child { border-bottom: 0; }
.ok { color: var(--ok); font-weight: bold; margin-right: 8px; }
.soon { color: var(--soon); font-weight: bold; margin-right: 8px; }
.note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Download ---------- */
.dl-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.dl-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 20px 22px;
}
.dl-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}
.dl-card p { margin: 0; }

/* ---------- Legal / policy pages ---------- */
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 28px;
  font-size: 0.95rem;
}
.legal th,
.legal td {
  border: 1px solid var(--card-border);
  padding: 8px 12px;
  text-align: left;
  vertical-align: top;
}
.legal th {
  background: var(--card-bg);
  font-weight: 600;
}
.legal h2 {
  font-size: 1.35rem;
  margin: 40px 0 12px;
}
.legal h2:first-child { margin-top: 0; }
.legal ul { padding-left: 1.3em; margin: 12px 0; }
.legal li { margin: 4px 0; color: var(--fg); }
.legal p { margin: 12px 0; }
.hero.legal-hero { padding: 56px 0 40px; }
.hero.legal-hero h1 { font-size: 2.2rem; }

/* ---------- Footer ---------- */
footer {
  padding: 32px 0 40px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }

@media (max-width: 600px) {
  .hero { padding: 40px 0; }
  .hero h1 { font-size: 2.2rem; }
  .tagline { font-size: 1.1rem; }
  .btn { display: block; margin: 8px auto; max-width: 280px; }
}

@media (min-width: 720px) {
  .dl-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .container { max-width: 1080px; }
  .hero { padding: 80px 0 64px; }
  .hero h1 { font-size: 3.4rem; }
  .lede { font-size: 1.12rem; max-width: 680px; }
}