:root {
  --fg: #1a1a1a;
  --fg-muted: #666;
  --bg: #fafafa;
  --accent: #06c755; /* LINE ブランドカラー */
  --border: #e5e5e5;
  --border-strong: #cfcfcf;
  --error: #c0392b;
  --radius: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
               "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); }
a:hover { text-decoration: underline; }

/* ---- Auth page ---- */
.auth-container {
  max-width: 420px;
  margin: 3rem auto;
  padding: 1.5rem;
}
.auth-container h1 {
  font-size: 1.35rem;
  margin: 0 0 0.6rem;
}
.auth-container .subtitle {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin: 0 0 1.8rem;
}
.loading {
  font-size: 0.9rem;
  color: var(--fg-muted);
}
.auth-container label {
  display: block;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
}
.auth-container input[type=password] {
  width: 100%;
  padding: 0.7rem;
  font-size: 1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: white;
  margin-top: 0.3rem;
}
.auth-container input[type=password]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.auth-container button {
  margin-top: 1.2rem;
  width: 100%;
  padding: 0.8rem;
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
.auth-container button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.error {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 0.8rem;
}

/* ---- Summary page ---- */
.summary-header {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0.8rem;
  border-bottom: 1px solid var(--border);
}
.summary-header h1 {
  font-size: 1.3rem;
  margin: 0;
}
.updated {
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin: 0.3rem 0 0;
}
.summary-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem;
}
.summary-body h1 { font-size: 1.5rem; }
.summary-body h2 {
  font-size: 1.15rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2rem;
  margin-top: 2rem;
}
.summary-body h3 { font-size: 1.0rem; margin-top: 1.5rem; }
.summary-body code {
  background: #f0f0f0;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.9em;
}
.summary-body pre {
  background: #f0f0f0;
  padding: 0.8rem;
  border-radius: var(--radius);
  overflow-x: auto;
}
.summary-body pre code { background: transparent; padding: 0; }
.summary-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.9rem;
}
.summary-body th, .summary-body td {
  border: 1px solid var(--border);
  padding: 0.5rem;
  text-align: left;
}
.summary-body th { background: #f5f5f5; }
.summary-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--fg-muted);
  margin: 1rem 0;
}

/* ---- Doc pages (privacy, terms) ---- */
.doc-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}
.doc-container h1 { font-size: 1.5rem; margin-top: 0; }
.doc-container h2 {
  font-size: 1.1rem;
  margin-top: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2rem;
}
.doc-container ul { padding-left: 1.2rem; }
.doc-container li { margin: 0.3rem 0; }

/* ---- Footer ---- */
footer {
  margin-top: 3rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--fg-muted);
}
footer a {
  color: var(--fg-muted);
  margin: 0 0.4rem;
}