@charset "UTF-8";

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #fff;
  color: #000;
  font-family: 'Helvetica Neue', sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ======== トップページレイアウト ======== */
.container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.content {
  max-width: 600px;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1rem;
  color: #333;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.login-button {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 9999px;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 2px solid #000;
  margin-top: 0.5rem;
}

/* 白背景・黒文字ボタン */
.login-button.white-style {
  background-color: #fff;
  color: #000;
}
.login-button.white-style:hover {
  background-color: #000;
  color: #fff;
}

/* 黒背景・白文字ボタン */
.login-button.black-style {
  background-color: #000;
  color: #fff;
}
.login-button.black-style:hover {
  background-color: #fff;
  color: #000;
}

/* ======== ログページ用レイアウト ======== */
.main {
  flex: 1;
  padding: 3rem 1rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.top-link {
  align-self: flex-start;
  margin-bottom: 2rem;
  margin-left: 1rem;
  font-size: 0.95rem;
}

.top-link a {
  color: #000;
  text-decoration: none;
  border-bottom: 1px solid #000;
}
.top-link a:hover {
  opacity: 0.7;
}

.page-title {
  font-size: 1.8rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
}

.log-box {
  background-color: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  padding: 2rem;
  max-width: 700px;
  width: 100%;
}

.log-entry {
  margin-bottom: 1.5rem;
}

.log-entry time {
  font-weight: bold;
  color: #555;
  display: block;
  margin-bottom: 0.3rem;
}


/* ======== フォーム用 ======== */
.message-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 各セクションの余白 */
.form-section {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 0.3rem;
  justify-content: flex-start;
}

/* ラジオボタンのスタイル */
.radio-group {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 1rem;
  border: 2px solid #000;
  border-radius: 9999px;
  padding: 0.3rem 0.7rem;
  transition: all 0.3s ease;
  background-color: #fff;
  color: #000;
  user-select: none;
}

.radio-group input[type="radio"] {
  display: none;
}

.radio-group span {
  display: inline-block;
  /* padding: 0.3rem 0.5rem; */
  transition: all 0.3s ease;
}

/* CSS :has()対応ブラウザ向け（Chrome, Edge, Safariなど） */
.radio-group:has(input[type="radio"]:checked) {
  background-color: #000;
  color: #fff;
}

.radio-group input[type="radio"]:checked ~ .radio-group {
  background-color: #000;
  color: #fff;
}


/* テキストエリア */
textarea {
  width: 100%;
  height: 200px;
  font-size: 1rem;
  padding: 1rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  resize: vertical;
  font-family: inherit;
}

/* 送信ボタン */
.submit-button {
  background-color: #000;
  color: #fff;
  border: none;
  border-radius: 9999px;
  padding: 0.5rem 2rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.submit-button:hover {
  background-color: #333;
}

hr {
  margin: 30px 0px;
}


/* ======== フッター共通 ======== */
footer {
  text-align: center;
  padding: 1rem;
  background-color: #f9f9f9;
  font-size: 0.9rem;
  border-top: 1px solid #ddd;
}

footer a {
  color: #000;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.footer-links {
  margin-bottom: 0.5rem;
}

/* ======== レスポンシブ対応 ======== */
@media (max-width: 600px) {
  h1 {
    font-size: 2rem;
  }
  .subtitle {
    font-size: 0.95rem;
  }
  .page-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
  }
  .log-box {
    padding: 1.5rem;
  }
  .top-link {
    font-size: 0.85rem;
  }
}