/* 画面中央配置 */
.center-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: #fafafa;
  margin: 0;
}

/* カード風コンテナ */
.card {
  background: white;
  width: 360px;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  text-align: center;
}

.title {
  font-size: 28px;
  margin-bottom: 4px;
  color: #4285f4;
}

.subtitle {
  color: #555;
  margin-bottom: 24px;
}

.input-group {
  text-align: left;
  margin-bottom: 18px;
}

.input-group label {
  font-size: 14px;
  color: #555;
}

.input-group input {
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 16px;
}

.btn-primary {
  width: 100%;
  padding: 12px;
  background: #4285f4;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
}

.btn-primary:hover {
  background: #357ae8;
}

.error {
  color: red;
  margin-top: 12px;
}

/* ホーム画面 */
.top-bar {
  background: #4285f4;
  color: white;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 20px;
  font-weight: bold;
}

.logout {
  background: white;
  color: #4285f4;
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
}

.home-container {
  padding: 40px;
  text-align: center;
}

.button-list {
  margin-top: 30px;
}

.btn-menu {
  display: block;
  width: 280px;
  padding: 14px;
  margin: 12px auto;
  font-size: 18px;
  background: white;
  border: 2px solid #4285f4;
  color: #4285f4;
  border-radius: 6px;
  cursor: pointer;
}

.btn-menu:hover {
  background: #4285f4;
  color: white;
}

.hidden {
  display: none;
}