:root {
  --bg: #fbfaf7;
  --panel: #ffffff;
  --ink: #1d1b19;
  --muted: #5f5a54;
  --line: #e6e1d9;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --code: #f2eee7;
  --radius: 14px;
  --max: 1080px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141312;
    --panel: #1c1a18;
    --ink: #eeeae4;
    --muted: #a8a197;
    --line: #2e2b27;
    --accent: #fb923c;
    --accent-ink: #1a1007;
    --code: #24211e;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 20px; }
.brand img { width: 30px; height: 30px; }
nav.top { display: flex; gap: 18px; align-items: center; font-size: 15px; }
nav.top a { color: var(--muted); text-decoration: none; }
nav.top a:hover { color: var(--ink); }
nav.top .lang { border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; color: var(--ink); }

.hero { padding: 72px 0 40px; text-align: center; }
.hero h1 { font-size: clamp(32px, 5.4vw, 54px); line-height: 1.15; margin: 0 0 18px; letter-spacing: -0.01em; }
.hero p.lede { font-size: clamp(17px, 2.2vw, 21px); color: var(--muted); max-width: 720px; margin: 0 auto 30px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 22px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid var(--line); color: var(--ink); background: var(--panel); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.note { font-size: 14px; color: var(--muted); margin-top: 14px; }

.shot { margin: 28px auto 0; max-width: 960px; }
.shot img { width: 100%; height: auto; display: block; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: 0 10px 40px rgba(0,0,0,.08); }
.shot figcaption { font-size: 14px; color: var(--muted); text-align: center; margin-top: 10px; }

section.block { padding: 56px 0; border-top: 1px solid var(--line); }
section.block h2 { font-size: 28px; margin: 0 0 24px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.pair figure { margin: 0; }
.pair img { width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--line); display: block; }
.pair figcaption { font-size: 14px; color: var(--muted); margin-top: 8px; }
ol.steps { padding-left: 1.3em; margin: 0; }
ol.steps li { margin: 0 0 14px; }
kbd { font: 14px/1 ui-monospace, Consolas, monospace; background: var(--code); border: 1px solid var(--line); border-radius: 5px; padding: 2px 6px; }
code { font-family: ui-monospace, Consolas, monospace; background: var(--code); border-radius: 5px; padding: 1px 5px; }

.prose { max-width: 760px; padding: 48px 0 64px; }
.prose h1 { font-size: 34px; margin: 0 0 6px; }
.prose h2 { font-size: 21px; margin: 34px 0 8px; }
.prose .updated { color: var(--muted); font-size: 15px; margin: 0 0 24px; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; gap: 18px; flex-wrap: wrap; justify-content: space-between; }
footer a { color: var(--muted); }

@media (max-width: 760px) {
  .grid, .pair { grid-template-columns: 1fr; }
  nav.top a.hide-sm { display: none; }
  .hero { padding: 48px 0 28px; }
}

.plan { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.plan li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; display: grid; grid-template-columns: 150px 1fr; gap: 18px; align-items: baseline; }
.plan .when { font-weight: 700; color: var(--accent); }
.plan h3 { margin: 0 0 4px; font-size: 18px; }
.plan p { margin: 0; color: var(--muted); font-size: 16px; }
.badge { display: inline-block; font-size: 14px; font-weight: 600; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 3px 12px; margin-bottom: 18px; }
@media (max-width: 760px) { .plan li { grid-template-columns: 1fr; gap: 4px; } }

.signup { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; max-width: 560px; margin: 0 auto; }
.signup input[type=email] { flex: 1 1 260px; min-width: 0; font: inherit; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); }
.signup input[type=email]:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.signup button { font: inherit; font-weight: 600; cursor: pointer; }
.signup button:disabled { opacity: .6; cursor: default; }
.signup .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.signup-msg.ok { color: var(--ink); font-weight: 600; font-size: 16px; }
.signup-msg.bad { color: var(--accent); }