* {
  box-sizing: border-box;
}

body {
  font-family: 'Helvetica Neue', Helvetica, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  background: linear-gradient(160deg, #f5f7fa 0%, #e4e8ec 100%);
  color: #333;
  margin: 0;
  min-height: 100vh;
  padding: 2rem 1rem;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}

h2 {
  font-size: 1rem;
  margin: 1.5rem 0 0.5rem;
  color: #666;
}

p {
  margin: 0.5rem 0;
  line-height: 1.6;
}

.info {
  color: #666;
  font-size: 0.9rem;
}

a {
  color: #06c755;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* LINEログインボタン（LINE公式ガイドラインに近い緑） */
.line-login-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 1.5rem 0;
  padding: 12px 24px;
  background: #06c755;
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}

.line-login-btn:hover {
  background: #05b04c;
  text-decoration: none;
}

.line-icon {
  font-size: 1.2rem;
  font-weight: 700;
}

/* 結果ページ */
.profile {
  margin: 1rem 0;
  padding: 1rem;
  background: #f8f9fa;
  border-radius: 8px;
}

.profile .avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: block;
  margin-bottom: 0.5rem;
}

.profile code {
  font-size: 0.85em;
  word-break: break-all;
  background: #e9ecef;
  padding: 2px 6px;
  border-radius: 4px;
}

.token-info {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #666;
}

.error {
  color: #c00;
  font-weight: 500;
}

pre {
  background: #f1f3f5;
  padding: 1rem;
  border-radius: 8px;
  overflow: auto;
  font-size: 0.85rem;
}

.notes {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid #eee;
  font-size: 0.9rem;
}

.notes ol {
  margin: 0.5rem 0;
  padding-left: 1.2rem;
}

.notes li {
  margin: 0.25rem 0;
}

.notes code {
  background: #f1f3f5;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}