/* リセットと基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ボディのスタイル */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, 
                 "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* メインコンテナ */
.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 500px;
}

/* 見出し */
h1 {
    color: #333;
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
}

/* 入力グループ */
.input-group {
    position: relative;
    margin-bottom: 30px;
}

/* プライバシーの文言 */
.privacy-note {
    font-size: 0.85rem;
    color: #666;
    background-color: #f4f4f4;
    padding: 8px 12px;
    border-radius: 4px;
    margin-bottom: 16px;
    line-height: 1.5;
}

/* パスワード入力フィールド */
.password-input {
    width: 100%;
    padding: 15px 50px 15px 15px;
    font-size: 16px;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    transition: border-color 0.3s;
    font-family: monospace;
}

.password-input:focus {
    outline: none;
    border-color: #667eea;
}

/* パスワード表示切り替えボタン */
.toggle-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #666;
    font-size: 20px;
    user-select: none;
    transition: color 0.3s;
}

.toggle-password:hover {
    color: #667eea;
}

/* 強度メーター */
.strength-meter {
    height: 8px;
    background-color: #e1e8ed;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 20px;
}

.strength-meter-fill {
    height: 100%;
    width: 0%;
    transition: width 0.3s ease, background-color 0.3s ease;
    border-radius: 4px;
}

/* 強度テキスト */
.strength-text {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    min-height: 28px;
}

/* スコア表示 */
.score-display {
    text-align: center;
    font-size: 48px;
    font-weight: bold;
    margin: 20px 0;
    color: #666;
}

/* 評価基準リスト */
.criteria-list {
    background-color: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.criteria-item {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    font-size: 14px;
    color: #666;
    transition: color 0.3s;
}

.criteria-item:last-child {
    margin-bottom: 0;
}

.criteria-item.valid {
    color: #28a745;
}

.criteria-icon {
    margin-right: 10px;
    font-size: 16px;
}

/* 改善提案 */
.suggestions {
    background-color: #fff9c4;
    border-radius: 10px;
    padding: 15px;
    margin-top: 20px;
    font-size: 14px;
    color: #856404;
    display: none;
}

.suggestions.show {
    display: block;
}

.suggestions h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #856404;
}

.suggestions ul {
    list-style: none;
    padding-left: 20px;
}

.suggestions li:before {
    content: "▸ ";
    margin-right: 5px;
}

/* 強度レベルごとの色 */
.strength-very-weak { color: #dc3545; }
.strength-weak { color: #fd7e14; }
.strength-fair { color: #ffc107; }
.strength-good { color: #28a745; }
.strength-strong { color: #007bff; }

/* レスポンシブデザイン */
@media (max-width: 600px) {
    .container {
        padding: 30px 20px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .password-input {
        font-size: 14px;
        padding: 12px 45px 12px 12px;
    }
    
    .score-display {
        font-size: 36px;
    }
}