/* ログイン画面のスタイル */
.login-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.login-box {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.login-box h2 {
    color: #00d4ff;
    text-align: center;
    margin-bottom: 10px;
    font-size: 28px;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.login-box h3 {
    color: #fff;
    text-align: center;
    margin-bottom: 30px;
    font-size: 18px;
    opacity: 0.8;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: #fff;
    margin-bottom: 8px;
    font-size: 14px;
    opacity: 0.9;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #fff;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: #00d4ff;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.3);
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.4);
}

.login-btn:active {
    transform: translateY(0);
}

.error-message {
    color: #ff4444;
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
    min-height: 20px;
}

.login-info {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.login-info p {
    color: #fff;
    opacity: 0.7;
    font-size: 13px;
    margin: 5px 0;
}

.login-info p:first-child {
    font-weight: bold;
    opacity: 0.9;
    margin-bottom: 10px;
}

/* ユーザー情報表示 */
.user-info {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(0, 0, 0, 0.3);
    padding: 8px 16px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

#userDisplay {
    color: #00d4ff;
    font-size: 14px;
}

.logout-btn {
    background: rgba(255, 68, 68, 0.2);
    border: 1px solid rgba(255, 68, 68, 0.4);
    color: #ff4444;
    padding: 6px 16px;
    border-radius: 15px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: rgba(255, 68, 68, 0.3);
    border-color: rgba(255, 68, 68, 0.6);
    transform: translateY(-1px);
}

/* 管理者専用機能の表示制御 */
.admin-only {
    display: none;
}

/* レスポンシブ対応 */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }
    
    .login-box h2 {
        font-size: 24px;
    }
    
    .form-group input {
        font-size: 14px;
        padding: 10px 14px;
    }
    
    .login-btn {
        font-size: 14px;
        padding: 12px;
    }
}