/* 全体のリセットと基本スタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f7f6;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

/* ナビゲーションバー */
.navbar {
    background-color: #28a745; /* Green */
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    font-size: 1.8em;
    font-weight: bold;
}

.navbar nav a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    font-size: 1.1em;
    transition: color 0.3s ease;
}

.navbar nav a:hover {
    color: #e2e6ea;
}

/* フォーム共通スタイル */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1em;
}

.form-group input[type="file"] {
    padding: 5px 0;
}

/* ボタン共通スタイル */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease;
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: #007bff; /* Blue */
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-success {
    background-color: #28a745; /* Green */
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: #dc3545; /* Red */
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-social {
    width: 100%;
    margin-bottom: 10px;
    padding: 12px;
    font-weight: bold;
}

.btn-apple { background-color: #000; color: white; }
.btn-google { background-color: #ea4335; color: white; }
.btn-line { background-color: #00c300; color: white; }

.btn-apple:hover { background-color: #333; }
.btn-google:hover { background-color: #d93025; }
.btn-line:hover { background-color: #00a800; }

/* メッセージエリア */
.message-area {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    text-align: center;
}

.message-area.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message-area.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ログイン・登録画面 */
.login-container, .register-container {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    max-width: 450px;
    margin: 50px auto;
    text-align: center;
}

.login-container h1, .register-container h1 {
    margin-bottom: 25px;
    color: #333;
}

.login-container p, .register-container p {
    margin-top: 20px;
}

.login-container a, .register-container a {
    color: #007bff;
    text-decoration: none;
}

.login-container a:hover, .register-container a:hover {
    text-decoration: underline;
}

.social-login-options {
    margin-top: 20px;
    border-top: 1px solid #eee;
    padding-top: 20px;
}

/* タイムライン画面 */
.timeline-container {
    padding-top: 30px;
    flex-grow: 1; /* フッターを下に固定するため */
}

.timeline-container h1 {
    margin-bottom: 20px;
    text-align: center;
    color: #333;
}

.post-card, .ad-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    margin-bottom: 20px;
    padding: 20px;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
}

.post-username {
    font-weight: bold;
    color: #28a745;
}

.post-timestamp {
    font-size: 0.85em;
    color: #888;
}

.post-content p {
    margin-bottom: 15px;
    line-height: 1.8;
    white-space: pre-wrap; /* 改行を反映 */
    word-wrap: break-word; /* 長い単語の折り返し */
}

.post-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 10px auto;
    border-radius: 5px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.ad-card {
    background-color: #f0f8ff; /* Light blue for ads */
    border: 1px dashed #aed6f1;
    text-align: center;
    padding: 25px;
}

.ad-card h3 {
    color: #1a73e8; /* Google blue-like */
    margin-bottom: 10px;
}

.ad-image {
    max-width: 80%;
    height: auto;
    margin: 15px auto;
    display: block;
    border-radius: 4px;
}

.ad-link {
    display: inline-block;
    background-color: #1a73e8;
    color: white;
    padding: 8px 15px;
    border-radius: 4px;
    text-decoration: none;
    margin-top: 10px;
    transition: background-color 0.3s ease;
}

.ad-link:hover {
    background-color: #0c62c2;
}

/* モーダル（投稿ポップアップ） */
.modal {
    display: none; /* JavaScriptで制御するため、デフォルトでは非表示 */
    position: fixed; /* Stay in place */
    z-index: 1000; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
    /* display: flex; <== この行を削除するかコメントアウトしてください！ */
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fefefe;
    margin: auto;
    padding: 30px;
    border: 1px solid #888;
    width: 90%;
    max-width: 600px;
    border-radius: 10px;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.modal-content .close-button {
    color: #aaa;
    position: absolute;
    top: 15px;
    right: 25px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.modal-content .close-button:hover,
.modal-content .close-button:focus {
    color: black;
    text-decoration: none;
}

/* 管理画面 */
.admin-container {
    padding-top: 30px;
    flex-grow: 1;
}

.admin-container h1 {
    margin-bottom: 20px;
    text-align: center;
    color: #333;
}

.user-verification-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
    margin-bottom: 20px;
    padding: 20px;
}

.user-verification-card h3 {
    color: #007bff;
    margin-bottom: 10px;
}

.user-verification-card p {
    margin-bottom: 5px;
}

.verification-images {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 15px;
    justify-content: center;
}

.image-wrapper {
    flex: 1 1 calc(50% - 20px); /* 2カラム表示 (20pxはgap分) */
    text-align: center;
    min-width: 250px; /* 最小幅 */
}

.image-wrapper h4 {
    margin-bottom: 10px;
    color: #555;
}

.verification-image {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.admin-actions {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

.admin-actions textarea {
    flex-grow: 1;
    min-height: 80px;
    margin-bottom: 10px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        text-align: center;
    }
    .navbar nav {
        margin-top: 10px;
    }
    .navbar nav a {
        margin: 0 10px;
    }

    .login-container, .register-container {
        margin: 20px auto;
        padding: 20px;
    }

    .image-wrapper {
        flex: 1 1 100%; /* スマートフォンでは1カラム表示 */
    }

    .admin-actions {
        flex-direction: column;
    }
    .admin-actions button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .navbar .logo {
        font-size: 1.5em;
    }
    .navbar nav a {
        font-size: 1em;
    }
    .btn {
        padding: 8px 15px;
        font-size: 0.9em;
    }
    .modal-content {
        padding: 20px;
    }
    .modal-content h2 {
        font-size: 1.5em;
    }
}