:root {
  color-scheme: light;
  font-family: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: #343e35;
  background: #fffcf5;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }
a { color: #315f50; text-underline-offset: .22em; }
:focus-visible { outline: 3px solid #315f50; outline-offset: 4px; }
.site-header, main { width: min(100% - 40px, 720px); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 24px; border-bottom: 1px solid #d9e2d6; font-size: 14px; }
.brand { font-size: 23px; font-weight: 700; text-decoration: none; }
main { padding-block: clamp(30px, 6vw, 54px); }
h1 { margin: 0; font-size: clamp(25px, 5vw, 34px); line-height: 1.5; }
.introduction { margin: 18px 0 28px; }
.status-panel { padding: clamp(20px, 4vw, 30px); border: 1px solid #d9e2d6; border-radius: 16px; background: #f2f6ee; }
h2 { margin: 0 0 8px; font-size: 16px; font-weight: 500; }
.status { margin: 0 0 10px; color: #315f50; font-size: 22px; font-weight: 700; }
.status-note { margin: 0 0 22px; color: #59675f; font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
button { min-height: 48px; padding: 10px 20px; border: 1px solid #315f50; border-radius: 24px; color: #fff; background: #315f50; font: inherit; font-weight: 600; cursor: pointer; }
button.secondary { color: #315f50; background: #fffcf5; }
button:hover:not(:disabled) { border-color: #25483d; background: #25483d; color: #fff; }
button:disabled { opacity: .5; cursor: default; }
.message, .error { margin: 16px 0 0; font-size: 14px; }
.message:empty { display: none; }
.error { color: #93352c; font-weight: 600; }
.notes { padding-left: 1.4em; margin: 28px 0 0; color: #59675f; font-size: 14px; }
.notes li + li { margin-top: 12px; }
@media (max-width: 480px) {
  .site-header, main { width: calc(100% - 36px); }
  .actions { flex-direction: column; }
  button { width: 100%; }
}