/* 色はすべて CSS 変数で定義（後でブランドカラーに差し替える） */
:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-surface-muted: #eef1f5;
  --color-text: #1f2328;
  --color-text-muted: #59636e;
  --color-primary: #1f5fa8;
  --color-primary-contrast: #ffffff;
  --color-border: #d9dee5;
  --color-chip-bg: #e8f0fb;
  --color-chip-text: #163f70;
  --color-link: #1f5fa8;

  --radius: 12px;
  --max-width: 760px;
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", Meiryo, system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1216;
    --color-surface: #171b21;
    --color-surface-muted: #1e242c;
    --color-text: #e6e9ee;
    --color-text-muted: #9aa5b1;
    --color-primary: #5b9bea;
    --color-primary-contrast: #0f1216;
    --color-border: #2a313b;
    --color-chip-bg: #1d2b3d;
    --color-chip-text: #bcd4f3;
    --color-link: #7fb3f0;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  /* 右下のウィジェットと本文が重ならないよう余白を確保 */
  padding-bottom: 120px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

a { color: var(--color-link); }

.site-header {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1.3;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
  padding-left: 12px;
  border-left: 4px solid var(--color-primary);
}

.lead {
  margin: 0;
  color: var(--color-text-muted);
}

main { padding: 24px 0; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 20px 16px;
  margin-bottom: 16px;
}

.card--muted { background: var(--color-surface-muted); }

.steps { margin: 0; padding-left: 1.4em; }
.steps li { margin-bottom: 6px; }

.plain { margin: 0; padding-left: 1.2em; }
.plain li { margin-bottom: 6px; }

.note {
  margin: 12px 0 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chips li {
  background: var(--color-chip-bg);
  color: var(--color-chip-text);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.95rem;
}

.site-footer {
  padding: 16px 0 32px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}
.site-footer p { margin: 0; }

/* agent_id 未設定でビルドしたときの「準備中」表示 */
.pending-notice {
  position: fixed;
  right: 16px;
  bottom: 16px;
  max-width: 320px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.9rem;
}