/* 共通の最小スタイル（ログイン・権限なし・仮トップ用）。各ページのデザイン確定後に整理する */
:root {
  --bg: #f4f5f8;
  --surface: #ffffff;
  --text: #1d2130;
  --muted: #646b80;
  --border: #dde0e8;
  --accent: #5865f2;       /* Discord */
  --accent-hover: #4752c4;
  --error-bg: #fdecec;
  --error-text: #a3261f;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11131a;
    --surface: #1b1e28;
    --text: #e8eaf2;
    --muted: #9aa0b4;
    --border: #2d3140;
    --error-bg: #3a1c1c;
    --error-text: #ffb4ab;
  }
}

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

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Hiragino Sans", "Yu Gothic UI", sans-serif;
  line-height: 1.7;
}

.card {
  width: 100%;
  max-width: 420px;
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-align: center;
}
.card__title { margin: 0 0 12px; font-size: 1.5rem; letter-spacing: .05em; }
.card__note { color: var(--muted); font-size: .85rem; margin-top: 24px; }
.card__actions { display: flex; flex-direction: column; gap: 8px; }

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.btn--discord { background: var(--accent); color: #fff; width: 100%; margin-top: 8px; }
.btn--discord:hover { background: var(--accent-hover); }
.btn--ghost { background: transparent; color: var(--muted); border-color: var(--border); padding: 4px 12px; font-weight: 400; font-size: .85rem; }
.btn--ghost:hover { color: var(--text); }

.notice { padding: 8px 12px; border-radius: 8px; background: var(--bg); font-size: .9rem; }
.notice--error { background: var(--error-bg); color: var(--error-text); }

.user { display: flex; align-items: center; justify-content: center; gap: 8px; margin: 16px 0; flex-wrap: wrap; }
.user__avatar { border-radius: 50%; }
.user__logout { margin: 0; }

.nav { display: grid; gap: 8px; margin-top: 16px; }
.nav__item {
  display: block;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}
.nav__item:hover { border-color: var(--accent); }