/* 公開ページ全体の基本レイアウト。OAuth審査で読みやすい静的ページにする。 */
:root {
  --public-bg: #f9fafd;
  --public-surface: #ffffff;
  --public-surface-muted: #eef3f8;
  --public-border: #d8dee8;
  --public-text: #1f2937;
  --public-muted: #5f6875;
  --public-blue: #0957d0;
  --public-blue-dark: #0646a8;
  --public-grid: #cfd6df;
  --public-orange: #ff9800;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--public-bg);
  color: var(--public-text);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.65;
}

a {
  color: var(--public-blue);
}

/* 公開ページ共通のヘッダーとナビゲーション。 */
.public-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
  padding: 0 40px;
  border-bottom: 1px solid var(--public-border);
  background: rgba(255, 255, 255, 0.96);
}

.public-brand {
  color: var(--public-text);
  font-size: 20px;
  font-weight: 700;
  text-decoration: none;
}

.public-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.public-nav a {
  padding: 8px 12px;
  color: var(--public-muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.public-nav a[aria-current="page"] {
  color: var(--public-blue);
}

/* ホームページのファーストビュー。 */
.public-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 48px;
  align-items: center;
  max-width: 1120px;
  min-height: 560px;
  margin: 0 auto;
  padding: 72px 32px 56px;
}

.public-hero-copy h1,
.public-document h1 {
  margin: 0;
  font-size: clamp(40px, 8vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

.public-kicker {
  margin: 0 0 12px;
  color: var(--public-blue);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.public-lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: var(--public-muted);
  font-size: 20px;
}

.public-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.public-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--public-blue);
  background: var(--public-blue);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.public-button:hover,
.public-button:focus {
  background: var(--public-blue-dark);
}

.public-button-secondary {
  background: var(--public-surface);
  color: var(--public-blue);
}

.public-button-secondary:hover,
.public-button-secondary:focus {
  background: var(--public-surface-muted);
}

/* シフト表らしさを伝える軽量なHTMLプレビュー。 */
.public-sheet-preview {
  overflow: hidden;
  border: 1px solid var(--public-border);
  background: var(--public-surface);
  box-shadow: 0 18px 44px rgba(31, 41, 55, 0.12);
}

.public-sheet-toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  height: 40px;
  padding: 0 14px;
  border-bottom: 1px solid var(--public-border);
  background: var(--public-surface-muted);
}

.public-sheet-toolbar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--public-grid);
}

.public-sheet-preview table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.public-sheet-preview th,
.public-sheet-preview td {
  height: 52px;
  padding: 8px;
  border: 1px solid var(--public-grid);
  text-align: center;
  vertical-align: middle;
}

.public-sheet-preview thead th {
  background: var(--public-orange);
  color: #111827;
  font-weight: 700;
}

.public-sheet-preview tbody th {
  background: #d7ebf8;
  text-align: left;
}

/* コンテンツセクションと文書ページの本文。 */
.public-section,
.public-document {
  max-width: 1040px;
  margin: 0 auto;
  padding: 56px 32px;
}

.public-section h2,
.public-document h2 {
  margin: 0 0 18px;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: 0;
}

.public-section p,
.public-document p {
  color: var(--public-muted);
}

.public-section-muted {
  max-width: none;
  padding-right: max(32px, calc((100vw - 1040px) / 2 + 32px));
  padding-left: max(32px, calc((100vw - 1040px) / 2 + 32px));
  border-top: 1px solid var(--public-border);
  border-bottom: 1px solid var(--public-border);
  background: var(--public-surface);
}

.public-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.public-feature-grid article {
  padding: 24px;
  border: 1px solid var(--public-border);
  background: var(--public-surface);
}

.public-feature-grid h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.public-feature-grid p {
  margin: 0;
}

.public-document {
  max-width: 840px;
}

.public-document h1 {
  font-size: clamp(36px, 6vw, 56px);
}

.public-document section {
  padding: 28px 0;
  border-bottom: 1px solid var(--public-border);
}

.public-updated {
  margin: 16px 0 18px;
}

/* フッターには審査者が確認しやすい連絡先を常時表示する。 */
.public-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 40px;
  border-top: 1px solid var(--public-border);
  background: var(--public-surface);
  color: var(--public-muted);
}

.public-footer p {
  margin: 4px 0 0;
}

.public-footer address {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: flex-end;
  font-style: normal;
}

@media (max-width: 860px) {
  .public-header,
  .public-footer {
    align-items: flex-start;
    flex-direction: column;
    padding-right: 20px;
    padding-left: 20px;
  }

  .public-hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 48px 20px;
  }

  .public-feature-grid {
    grid-template-columns: 1fr;
  }

  .public-section,
  .public-document {
    padding-right: 20px;
    padding-left: 20px;
  }
}