/* MX Stage の販売サイト。外のフォントや解析のタグは読まない（プライバシーのため）。色は IBM Carbon の White テーマに合わせる。 */
:root {
  --text: #161616;
  --text-2: #525252;
  --bg: #ffffff;
  --layer: #f4f4f4;
  --border: #e0e0e0;
  --accent: #0f62fe;
  --accent-hover: #0050e6;
  --ok: #198038;
  --warn: #8e6a00;
  --err: #da1e28;
  --radius: 0;
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  line-height: 1.6;
  background: var(--bg);
}
a {
  color: var(--accent);
}
a:hover {
  color: var(--accent-hover);
}
code,
.mono {
  font-family: "IBM Plex Mono", Consolas, "SFMono-Regular", monospace;
  font-size: 0.92em;
}
.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}
header.site {
  border-bottom: 1px solid var(--border);
}
header.site .wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 56px;
  flex-wrap: wrap;
}
.brand {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}
nav.main {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-left: auto;
  font-size: 0.95rem;
}
nav.main a {
  color: var(--text);
  text-decoration: none;
}
nav.main a:hover,
nav.main a[aria-current="page"] {
  color: var(--accent);
}
main {
  padding: 40px 0 64px;
}
h1 {
  font-size: 2.2rem;
  line-height: 1.25;
  font-weight: 400;
  margin: 0 0 16px;
}
h2 {
  font-size: 1.5rem;
  font-weight: 400;
  margin: 48px 0 12px;
}
h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 24px 0 8px;
}
.lead {
  font-size: 1.2rem;
  color: var(--text-2);
  max-width: 760px;
}
.muted {
  color: var(--text-2);
}
.small {
  font-size: 0.9rem;
}
.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.card {
  background: var(--layer);
  padding: 20px;
  border-radius: var(--radius);
}
.card h3 {
  margin-top: 0;
}
.button {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  text-decoration: none;
  border: 0;
  font: inherit;
  cursor: pointer;
}
.button:hover {
  background: var(--accent-hover);
  color: #fff;
}
.button.secondary {
  background: transparent;
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}
.button[disabled] {
  background: #c6c6c6;
  color: #8d8d8d;
  cursor: not-allowed;
}
.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0;
}
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
}
.steps li {
  counter-increment: step;
  padding-left: 40px;
  position: relative;
  margin: 12px 0;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  background: var(--text);
  color: #fff;
  text-align: center;
  line-height: 28px;
  font-size: 0.9rem;
}
table {
  border-collapse: collapse;
  width: 100%;
}
th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  font-weight: 600;
  background: var(--layer);
}
.price {
  font-size: 2.6rem;
  font-weight: 300;
}
form.buy label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-2);
  margin: 16px 0 4px;
}
form.buy input {
  width: 100%;
  max-width: 520px;
  padding: 10px 12px;
  font: inherit;
  border: 0;
  border-bottom: 1px solid #8d8d8d;
  background: var(--layer);
}
form.buy input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.notice {
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: #edf5ff;
  margin: 16px 0;
}
.notice.error {
  border-color: var(--err);
  background: #fff1f1;
}
.notice.ok {
  border-color: var(--ok);
  background: #defbe6;
}
.keybox {
  font-family: "IBM Plex Mono", Consolas, monospace;
  word-break: break-all;
  background: var(--layer);
  padding: 16px;
  font-size: 0.85rem;
}
details {
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
summary {
  cursor: pointer;
  font-weight: 600;
}
.legal h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 32px;
}
footer.site {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  font-size: 0.9rem;
  color: var(--text-2);
}
footer.site nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
@media (max-width: 640px) {
  h1 {
    font-size: 1.7rem;
  }
  nav.main {
    margin-left: 0;
  }
}