*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  line-height: 1.7;
  color: #1f2937;
  background: #f9fafb;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  padding: 16px 0;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.logo {
  display: block;
}

.hero {
  padding: 64px 0;
  text-align: center;
}

.hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

.hero h1 {
  margin: 32px 0 8px;
  font-size: 2rem;
}

.button {
  margin-top: 16px;
  padding: 12px 28px;
  font-size: 1rem;
  color: #fff;
  background: #0f766e;
  border: none;
  border-radius: 999px;
  cursor: pointer;
}

.button:hover {
  background: #115e59;
}

.check-result {
  min-height: 1.7em;
  color: #0f766e;
  font-weight: bold;
}

.status {
  padding: 32px 0 64px;
}

.status-list {
  max-width: 320px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.status-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #e5e7eb;
}

.status h2 {
  text-align: center;
}

.ok {
  color: #15803d;
  font-weight: bold;
}

.ng {
  color: #b91c1c;
  font-weight: bold;
}

/* CSS が読み込まれていれば NG → OK に置き換わる */
.css-check {
  font-size: 0;
}

.css-check::after {
  content: "OK";
  font-size: 1rem;
  color: #15803d;
  font-weight: bold;
}

.site-footer {
  padding: 24px 0;
  text-align: center;
  color: #6b7280;
  background: #fff;
  border-top: 1px solid #e5e7eb;
}