/* 認証まわりの最低限のスタイル。サイトのデザインは後で差し替える前提 */
:root {
  --bg: #fbfbf9;
  --fg: #1d1d1b;
  --muted: #6b6b66;
  --line: #e2e1dc;
  --panel: #ffffff;
  --accent: #2f5d50;
  --accent-fg: #ffffff;
  --danger: #b3261e;
  --members: #8a5a00;
  --members-bg: #fbf0d9;
  --draft: #4a4a8a;
  --draft-bg: #e8e8f6;
  --notice-bg: #eaf3ef;
  --error-bg: #fbeae8;
  --radius: 8px;
  --font: system-ui, -apple-system, 'Hiragino Sans', 'Noto Sans JP', 'Yu Gothic UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --fg: #ecebe6;
    --muted: #9c9b95;
    --line: #34342f;
    --panel: #1e1e1c;
    --accent: #7fc2ab;
    --accent-fg: #10201b;
    --danger: #f2a39c;
    --members: #f0c46a;
    --members-bg: #3a2e14;
    --draft: #b8b8f0;
    --draft-bg: #2a2a44;
    --notice-bg: #1d2e28;
    --error-bg: #3a1f1c;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.8;
  font-size: 16px;
}
a { color: var(--accent); text-underline-offset: 0.2em; }
.mono { font-family: var(--mono); font-size: 0.92em; }
.muted { color: var(--muted); }

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 1rem;
  border-bottom: 1px solid var(--line);
}
.site-title { font-weight: 600; color: var(--fg); text-decoration: none; letter-spacing: 0.02em; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; flex: 1; }
.site-nav a { color: var(--fg); text-decoration: none; }
.site-nav a[aria-current='page'] { text-decoration: underline; }
.user-menu { display: flex; align-items: baseline; gap: 1rem; font-size: 0.9rem; }
.user-menu form { margin: 0; }

.site-main { max-width: 64rem; margin: 0 auto; padding: 2rem 1rem 4rem; }
.site-footer {
  display: flex;
  justify-content: space-between;
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}
.site-footer a { color: var(--muted); }

h1 { font-size: 1.6rem; line-height: 1.4; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.75rem; }

.page { max-width: 42rem; }
.page-meta { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; font-size: 0.9rem; }
.prose img { max-width: 100%; height: auto; }
.prose pre { overflow-x: auto; padding: 1rem; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.prose code { font-family: var(--mono); font-size: 0.92em; }

.tag {
  display: inline-block;
  margin-left: 0.4em;
  padding: 0 0.5em;
  border-radius: 999px;
  font-size: 0.72rem;
  line-height: 1.7;
  vertical-align: 0.1em;
  white-space: nowrap;
}
.tag-public { background: var(--notice-bg); color: var(--accent); }
.tag-members { background: var(--members-bg); color: var(--members); }
.tag-draft { background: var(--draft-bg); color: var(--draft); }

.button {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--fg);
  font: inherit;
  font-size: 0.95rem;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { border-color: var(--muted); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.button.danger { color: var(--danger); border-color: currentColor; background: transparent; }
.button:disabled { opacity: 0.55; cursor: progress; }
button.link {
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}
button.link.danger { color: var(--danger); }

input[type='text'], input[type='number'], select, textarea {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--fg);
  font: inherit;
}
textarea { line-height: 1.6; resize: vertical; }
input:focus, select:focus, textarea:focus, .button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: block; margin-bottom: 1rem; font-size: 0.9rem; }
label > input, label > textarea, label > .slug-input { margin-top: 0.3rem; }
fieldset { margin: 0 0 1rem; padding: 0.75rem 1rem; border: 1px solid var(--line); border-radius: var(--radius); }
legend { font-size: 0.9rem; padding: 0 0.3rem; }
label.radio { display: flex; align-items: baseline; gap: 0.5rem; margin: 0.25rem 0; }
label.radio input { width: auto; }

.auth-box { max-width: 26rem; margin: 2rem auto; }
.auth-box form { margin: 1.5rem 0 0.5rem; }
.auth-box .button.primary { width: 100%; padding: 0.75rem; font-size: 1rem; }
.status { min-height: 1.8em; margin: 0.75rem 0; font-size: 0.9rem; }
.status[data-kind='error'] { color: var(--danger); }
.status[data-kind='info'] { color: var(--muted); }
.hint { color: var(--muted); font-size: 0.85rem; }
.notice { padding: 0.6rem 0.9rem; border-radius: var(--radius); background: var(--notice-bg); font-size: 0.9rem; }
.notice.error { background: var(--error-bg); color: var(--danger); }
.message { max-width: 32rem; margin: 3rem auto; text-align: center; }

.admin { max-width: 52rem; }
.panel { margin-bottom: 1.5rem; padding: 1.25rem 1.5rem; background: var(--panel); border: 1px solid var(--line); border-radius: calc(var(--radius) * 1.5); }
.panel h2:first-child, .panel-head h2 { margin-top: 0; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 0.75rem; }
.table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.table th, .table td { padding: 0.5rem 0.6rem 0.5rem 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: baseline; }
.table th { color: var(--muted); font-weight: 500; }
.table form { margin: 0; }
.inline-form { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0 1rem; }
.inline-form input[type='text'] { flex: 1 1 14rem; width: auto; }
.inline-form select { flex: 0 0 auto; width: auto; }
.inline-form form { margin: 0; }
.invite-result { margin: 0.75rem 0 1rem; padding: 0.9rem 1rem; border-radius: var(--radius); background: var(--notice-bg); font-size: 0.9rem; }
.copy-row { display: flex; gap: 0.5rem; }
.copy-row input { flex: 1; }

.breadcrumb { font-size: 0.85rem; color: var(--muted); }
.editor-row { display: grid; grid-template-columns: 1fr 8rem; gap: 1rem; }
.slug-input { display: flex; align-items: center; gap: 0.25rem; }
.editor-actions { display: flex; gap: 0.5rem; }
.danger-zone { margin-top: 1rem; text-align: right; }

@media (max-width: 40rem) {
  .editor-row { grid-template-columns: 1fr; }
  .table { display: block; overflow-x: auto; white-space: nowrap; }
  .panel { padding: 1rem; }
}